LED Driver s for LCD Backlights
Mulitifunction Backlight LED Driver for Small LCD Panels (Charge Pump Type)
BD6088GUL
●Description BD6088GUL is “Intelligent LED Driver” that is the most suitable for the cellular phone. It has 6LED driver for LCD Backlight and GPO 4 port. It has ALC function, that is “Low Power Consumption System” realized. It can be developed widely from the model high End to the model Low End. As it has charge pump circuit for DCDC, it is no need to use coils, and it contributes to small space. VCSP50L3(3.50mm×3.50mm 0.5mm space) It adopts the very thin CSP package that is the most suitable for the slim phone. ●Functions 1) Total 6LEDs driver for LCD Backlight It have 4LEDs (it can select 4LED or 3LED) for exclusire use of Main and 2LEDs which can chose independent control or a main allotmert by resister setting. “Main Group” can be controlled by Auto Luminous Control (ALC) system. “Main Group” can be controlled by external PWM signal. ON/ off and a setup of electric current are possible at the time of the independent control by the independence. 2) Ambient Light sensor interface Main backlight can be controlled by ambient brightness. Photo Diode, Photo Transistor, Photo IC(Linear/Logarithm) can be connected. Bias source for ambient light sensor, gain and offset adjustment are built in. LED driver current as ambient level can be customized. 3) Charge Pump DC/DC for LED driver It has x1/x1.5/ x2 mode that will be selected automatically. The most suitable voltage up magnification is controlled automatically by LED port voltage. Output voltage fixed mode function loading (3.9V/4.2V/4.5V/4.8V) Soft start functions, Over voltage protection (Auto-return type), Over current protection (Auto-return type) Loading 4) GPO 4 Port Open Drain output and slope control loading 5) Thermal shutdown 6) I2C BUS FS mode(max 400kHz)
*This chip is not designed to protect itself against radioactive rays. *This material may be changed on its way to designing. *This material is not the official specification.
No.11040EAT29
●Absolute Maximum Ratings (Ta=25 oC) Parameter Maximum voltage Power Dissipation Operating Temperature Range Storage Temperature Range Symbol VMAX Pd Topr Tstg Ratings 7 1380
(note
Unit V mW ℃ ℃
-30 ～ +85 -55 ～ +150
note) Power dissipation deleting is 11.04mW/ oC, when it’s used in over 25 oC. (It’s deleting is on the board that is ROHM’s standard)
o ●Operating conditions (VBAT≥VIO, Ta=-35~85 C)
Parameter VBAT input voltage VIO pin voltage
Symbol VBAT VIO
Ratings 2.7 ～ 5.5 1.65 ～ 3.3
Unit V V
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●Electrical Characteristics (Unless otherwise specified, Ta=25°C, VBAT=3.6V, VIO=2.6V) Parameter 【Circuit Current】 VBAT Circuit current 1 VBAT Circuit current 2 VBAT Circuit current 3 VBAT Circuit current 4 VBAT Circuit current 5 VBAT Circuit current 6 【LED Driver】 LED current Step (Setup) LED current Step (At slope) LED Maximum setup current LED current accuracy LED current Matching LED OFF Leak current 【DC/DC(Charge Pump)】 Output Voltage 1 VoCP1
-
Technical Note
Symbol
Limits Min. Typ. Max.
Unit
Condition
IBAT1 IBAT2 IBAT3 IBAT4 IBAT5 IBAT6
-
0.1 0.5 61 92 123 0.25
3.0 3.0 65 102 140 1.0
μA μA mA mA mA mA
RESETB=0V, VIO= 0V RESETB=0V, VIO=2.6V DC/DC x1 mode, Io=60mA VBAT=4.0V DC/DC x1.5 mode, Io=60mA VBAT=3.6V DC/DC x2 mode, Io=60mA VBAT=2.7V ALC Operating ALCEN=1, AD cycle=0.5s setting Except sensor current LED1~6 LED1~6 LED1~6 ILED=15mA setting, VLED=1.0V Between LED1~6 at VLED=1.0V, ILED=15mA VLED=4.5V
ILEDSTP1 ILEDSTP2 IMAXWLED IWLED ILEDMT ILKLED -7% -
128 256 25.6 15 +7% 4 1.0
Step Step mA mA % μA
Vf+0.2 Vf+0.25 3.9 4.2 4.5 4.8 1.0 6.0 250 4.095 4.41 4.725 5.04 150 1.2 6.5 375
V V V V V mA MHz V mA
Vf is forward direction of LED Fixation Voltage Output ModeIo=60mA VBAT≧3.2V VBAT≥3.2V, VOUT=3.9V
3.705 Output Voltage 2 VoCP2 3.99 4.275 4.56 Drive ability Switching frequency Over Voltage Protection detect voltage Over Current Protection detect Current 【Sensor Interface】 SBIAS Output Voltage SBIAS Maximum Output current SBIAS Discharge resister at OFF SSENS Input range ADC resolution ADC integral calculus non-linearity ADC differential calculus non-linearity VoS IomaxS ROFFS VISS ADRES ADINL ADDNL -3 -1 2.85 2.47 30 0 IOUT fosc OVP OCP 0.8 -
VOUT=0V
3.0 2.6 1.0 8 -
3.15 2.73 1.5
VoS× 255/256
V V mA kΩ V bit
Io=200µA Io=200µA Vo=2.6V setting
+3 +1
LSB LSB
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●Electrical Characteristics (Unless otherwise specified, Ta=25°C, VBAT=3.6V, VIO=2.6V) Parameter 【SDA, SCL】 (I2C Interface) L level input voltage H level input voltage Hysteresis of Schmitt trigger input L level output voltage Input current 【RESETB】 (CMOS Input Pin) L level input voltage H level input voltage Input current 【WPWMIN】 (NMOS Input Pin) L level input voltage H level input voltage Input Current PWM input minimum High pulse width L level input voltage H level input voltage Input Current VILA VIHA IinA PWmin -0.3 1.4 80 0.3 VBAT +0.3 1 V V μA μs VILR VIHR IinR -0.3 0.75 × VIO 0.25 × VIO VBAT +0.3 1 V V μA VILI VIHI VhysI VOLI linI -0.3 0.75 × VIO 0.05 × VIO 0 0.25 × VIO VBAT +0.3 0.3 1 V V V V μA Symbol Limits Min. Typ. Max. Unit
Technical Note
Condition
SDA Pin, IOL=3 mA Input Voltage = 0.1×VIO～0.9×VIO
Input Voltage = 0.1×VIO～0.9×VIO
Input Voltage = 0.1×VBAT～0.9×VBAT WPWMIN Pin
【OUTCNT】 (Pull-down resistance NMOS Input Pin) VILA VIHA IinA -0.3 1.4 3.6 0.3 VBAT +0.3 10 V V μA Vin=1.8V
【OUT1～4】 ( NMOS Open Drain Output Pin) L level output voltage Output Leak current VOLG ILKG 0.3 1.0 V μA IOL=10mA Vout=3.6V
【GC1, GC2】 (Sensor Gain Control CMOS Output Pin) L level output voltage H level output voltage VOLS VOHS VoS -0.2 VIO -0.2 0.2 V V IOL=1mA IOH=1mA
【KBLT】 (Key Back Light Control CMOS Output Pin) L level output voltage H level output voltage Pull-downregistance VOLK VOHK RPUDK 1.0 0.2 2.0 V V MΩ IOL=1mA IOH=1mA Vin=3.3V
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●Block Diagram / Application Circuit example 1
1 μF 1μF
Technical Note
VBAT VBATCP VBAT1
CPGND
C1N
C2N
C1P
C2P
Charge Pump x1 / x1.5 / x2
VOUT
1μF
10µF
LED1
Charge Pump Mode Control
OVP
LED terminal voltage feedback
LED2
LED3
VIO
LED4
Main Back Light
(
)(
)(
)
RESETB SCL
LED5
LED6
SDA
Level I/O Shift
I C interface Digital Control
2
TSD
LEDGND VBAT Key Pad LED
W PWMIN
IREF
・・ OUTCNT
VREF
Photo IC VDD GC1 GC2 GND IOUT BH1600FVC SSENS 1μF SBIAS
Key Control
KBLT
VBAT
Sensor I/F
LED control GPO
OUT1
Slope Control Slope Control Slope Control Slope Control
SGND
OUT2 OUT3 OUT4
GC2 GC1
ALC
T3 (Open) GND1 T1 T2 T4
Fig.1
Block Diagram / Application Circuit example 1
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●Block Diagram / Application Circuit example 2
1 μF 1μF
Technical Note
VBAT VBATCP VBAT1
CPGND
C1N
C2N
C1P
C2P
Charge Pump x1 / x1.5 / x2
VOUT
1μF
10µF
LED1
Charge Pump Mode Control
OVP
LED terminal voltage feedback
LED2
LED3
4ch Main Back Light
VIO
LED4
(
)(
)(
)
RESETB LED5 SCL
SDA
Level I/O Shift
I C interface Digital Control
2
TSD
LED6
2ch Sub Back Light
LEDGND VBAT Key Pad LED
W PWMIN
IREF
・・ OUTCNT
VREF
Photo IC VDD GC1 GC2 GND IOUT BH1600FVC SSENS 1μF SBIAS
Key Control
KBLT
VBAT
Sensor I/F
LED control GPO
OUT1
Slope Control Slope Control Slope Control Slope Control
SGND
OUT2 OUT3 OUT4
GC2 GC1
ALC
T3 (Open) GND1 T1 T2 T4
Fig.2
Block Diagram / Application Circuit example 2
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●Pin Arrangement ［Bottom View］
Technical Note
T3 F T4 SSENS SGND VBAT1 VIO 6 x 6 Ball
E
SBIAS
GC1
GC2
SDA
OUT2
OUT4
D
LED5
LED6
SCL
OUT1
OUT3
VOUT
C
LEDGND
LED4
OUTCNT WPWMIN
C1P
C2P
B
LED2
LED3
RESETB
KBLT
C2N
VBATCP
A
INDEX
T1
LED1
GND1
C1N
CPGND
T2
○
1 2 3 4 5 6
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BD6088GUL
●Package VCSP50L3 CSP small package SIZE : 3.50mm×3.50mm(A difference in public：X,Y Both ±0.05mm) 2 A ball pitch : 0.5 mm
Technical Note
Height : 0.55mm max
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●Pin Functions No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Ball No. Pin Name B6 F4 A1 A6 F6 F1 F5 B3 E4 D3 A5 A3 C1 A4 C5 B5 C6 D6 A2 B1 B2 C2 D1 D2 E1 F2 E2 E3 F3 D4 E5 D5 E6 C4 C3 B4 VBATCP VBAT1 T1 T2 T3 T4 VIO RESETB SDA SCL CPGND GND1 LEDGND C1N C1P C2N C2P VOUT LED1 LED2 LED3 LED4 LED5 LED6 SBIAS SSENS GC1 GC2 SGND OUT1 OUT2 OUT3 OUT4 WPWMIN OUTCNT KBLT I/O I I O I I I/O I I/O I/O I/O I/O O I I I I I I O I O O O O O O I I O ESD Diode For Power For Ground GND GND VBAT VBAT GND VBAT GND VBAT GND VBAT GND VBAT GND VBAT GND VBAT GND VBAT VBAT VBAT VBAT GND GND VBAT GND GND GND GND GND GND GND GND GND VBAT GND VBAT GND VBAT GND VBAT GND VBAT GND GND GND GND VBAT GND VBAT GND VBAT GND Functions Battery is connected Battery is connected Test Ground Pin(short to Ground) Test Input Pin (short to Ground) Test Output Pin(Open) Test Input Pin (short to Ground) I/O Power supply is connected Reset input (L: reset, H: reset cancel) I2C data input / output I2C clock input Ground Ground Ground Charge Pump capacitor is connected Charge Pump capacitor is connected Charge Pump capacitor is connected Charge Pump capacitor is connected Charge Pump output pin LED is connected 1 for LCD Back Light LED is connected 2 for LCD Back Light LED is connected 3 for LCD Back Light LED is connected 4 for LCD Back Light LED is connected 5 for LCD Back Light LED is connected 6 for LCD Back Light Bias output for the Ambient Light Sensor Ambient Light Sensor input Ambient Light Sensor gain control output 1 Ambient Light Sensor gain control output 2 Ground General Output Port 1 General Output Port 1 General Output Port 1 General Output Port 1 External PWM input for Back Light * OUT1,2,3,4 Output Control (L:OFF) * Key Back Light Control Output
Technical Note
Equivalent Circuit A A B S M S C H I H B B B F G F G A E E E E E E Q N X X B U U U U V L W
* A setup of a register is separately necessary to make it effective.
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●Equivalent Circuit
Technical Note
A
B
VBAT
C
VBAT
E
F
VBAT
G
H
VBAT
VIO
I
VBAT
VIO
J
VBAT
VIO
L
VBAT
VBAT
M
VBAT
VBAT
N
VBAT
Q
VBAT
VBAT
R
VBAT
VBAT
S
VBAT
VBAT
U
V
VBAT
VBAT
W
VBAT
VIO
X
VoS
VBAT
Y
VIO
VBAT
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BD6088GUL
●I2C BUS format 2 The writing/reading operation is based on the I C slave standard. ・Slave address A7 A6 A5 A4 A3 A2 A1 R/W 1 1 1 0 1 1 0 1/0
Technical Note
・Bit Transfer SCL transfers 1-bit data during H. SCL cannot change signal of SDA during H at the time of bit transfer. If SDA changes while SCL is H, START conditions or STOP conditions will occur and it will be interpreted as a control signal.
SDA
SCL SDA a state of stability： SDA It can change Data are effective
・START and STOP condition When SDA and SCL are H, data is not transferred on the I2C- bus. This condition indicates, if SDA changes from H to L while SCL has been H, it will become START (S) conditions, and an access start, if SDA changes from L to H while SCL has been H, it will become STOP (P) conditions and an access end.
SDA
SCL
S START condition
P STOP condition
・Acknowledge It transfers data 8 bits each after the occurrence of START condition. A transmitter opens SDA after transfer 8bits data, and a receiver returns the acknowledge signal by setting SDA to L.
DATA OUTPUT BY TRANSMITTER not acknowledge DATA OUTPUT BY RECEIVER acknowledge SCL 1 2 8 clock pulse for acknowledgement 9
S START condition
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Technical Note
・Writing protocol A register address is transferred by the next 1 byte that transferred the slave address and the write-in command. The 3rd byte writes data in the internal register written in by the 2nd byte, and after 4th byte or, the increment of register address is carried out automatically. However, when a register address turns into the last address, it is set to 00h by the next transmission. After the transmission end, the increment of the address is carried out.
*1 *1
S X X X X X X X 0 A A 7 A 6 A 5 A 4 A 3 A 2 A 1 A 0 A D7 D6 D5 D4 D3 D2 D1 D0 A slave address R /W=0(write) from master to slave from slave to master register address D ATA
D7 D 6 D 5 D 4 D 3 D 2 D1 D0 A P DATA
register address increment A =acknowledge(SD A LOW) A =not acknowledge(SDA HIGH) S=START condition P=STOP condition *1: Write Timing
register address increment
・Reading protocol It reads from the next byte after writing a slave address and R/W bit. The register to read considers as the following address accessed at the end, and the data of the address that carried out the increment is read after it. If an address turns into the last address, the next byte will read out 00h. After the transmission end, the increment of the address is carried out.
SXXXXXXX slave address R/W=1(read) 1 A D7 D6 D5 D4 D3 D2 D1 D0 A DATA register address increment A=acknowledge(SDA LOW) A=not acknowledge(SDA HIGH) S=START condition P=STOP condition D7 D6 D5 D4 D3 D2 D1 D0 A P DATA register address increment
from master to slave from slave to master
・Multiple reading protocols After specifying an internal address, it reads by repeated START condition and changing the data transfer direction. The data of the address that carried out the increment is read after it. If an address turns into the last address, the next byte will read out 00h. After the transmission end, the increment of the address is carried out.
S X X X X X X X 0 A A7 A6 A5 A4 A3 A2 A1 A0 A Sr X X X X X X X 1 A slave address R/W=0(write) register address slave address R/W=1(read)
D7 D6 D5 D4 D3D2 D1D0 A DATA register address increment from master to slave from slave to master
D7D6 D5D4D3D2D1D0 A P DATA register address increment A=acknowledge(SDA LOW) A=not acknowledge(SDA HIGH) S=START condition P=STOP condition Sr=repeated START condition
As for reading protocol and multiple reading protocols, please do A(not acknowledge) after doing the final reading operation. It stops with read when ending by A(acknowledge), and SDA stops in the state of Low when the readingdata of that time is 0. However, this state returns usually when SCL is moved, data is read, and A(not acknowledge)is done.
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BD6088GUL
●Timing diagram
SDA
Technical Note
t BUF t LOW t SU;DAT t HD;STA
SCL t SU;STO P S
t HD;STA S
t HD;DAT t HIGH Sr
t SU;STA
●Electrical Characteristics(Unless otherwise specified, Ta=25 oC, VBAT=3.6V, VIO=2.6V)
Parameter
【I2C BUS format】
Symbol
Standard-mode Min. Typ. Max. Min.
Fast-mode Typ. Max.
Unit
SCL clock frequency LOW period of the SCL clock HIGH period of the SCL clock
Hold time (repeated) START condition After this period, the first clock is generated
fSCL tLOW tHIGH tHD;STA tSU;STA tHD;DAT tSU;DAT tSU;STO tBUF
0 4.7 4.0 4.0 4.7 0 250 4.0 4.7
-
100 3.45 -
0 1.3 0.6 0.6 0.6 0 100 0.6 1.3
-
400 0.9 -
kHz μs μs μs μs μs ns μs μs
Set-up time for a repeated START condition Data hold time Data set-up time Set-up time for STOP condition Bus free time between a STOP and START condition
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BD6088GUL
●Register List
Register data
Address W/R
Technical Note
Function D7 D6 VOUT(0) D5 DCDCMD IMLED(5) IW5(5) IW6(5) THL (1) GAIN (1) SOFS (1) IU0 (5) IU1 (5) IU2 (5) IU3 (5) IU4 (5) IU5 (5) IU6 (5) IU7 (5) IU8 (5) IU9 (5) IUA (5) IUB (5) IUC (5) IUD (5) IUE (5) IUF (5) CHYS (1) D4 DCDCFON IMLED(4) IW5(4) IW6(4) THL (0) GAIN(0) SOFS (0) IU0 (4) IU1 (4) IU2 (4) IU3 (4) IU4 (4) IU5 (4) IU6 (4) IU7 (4) IU8 (4) IU9 (4) IUA (4) IUB (4) IUC (4) IUD (4) IUE (4) IUF (4) CHYS (0) KBMD KBEN D3 W6MD ALCEN IMLED(3) IW5(3) IW6(3) TLH (3) STYPE SGAIN (3) AMB (3) IU0 (3) IU1 (3) IU2 (3) IU3 (3) IU4 (3) IU5 (3) IU6 (3) IU7 (3) IU8 (3) IU9 (3) IUA (3) IUB (3) IUC (3) IUD (3) IUE (3) IUF (3) CTH (3) OUT4MD OUT4EN KBSLP(1) D2 W5MD W6EN IMLED(2) IW5(2) IW6(2) TLH (2) VSB SGAIN (2) AMB (2) IU0 (2) IU1 (2) IU2 (2) IU3 (2) IU4 (2) IU5 (2) IU6 (2) IU7 (2) IU8 (2) IU9 (2) IUA (2) IUB (2) IUC (2) IUD (2) IUE (2) IUF (2) CTH (2) OUT3MD OUT3EN KBSLP(0) D1 W4MD W5EN IMLED(1) IW5(1) IW6(1) TLH (1) MDCIR SGAIN (1) AMB (1) IU0 (1) IU1 (1) IU2 (1) IU3 (1) IU4 (1) IU5 (1) IU6 (1) IU7 (1) IU8 (1) IU9 (1) IUA (1) IUB (1) IUC (1) IUD (1) IUE (1) IUF (1) CTH (1) OUT2MD OUT2EN D0 SFTRST MLEDMD MLEDEN IMLED(0) IW5(0) IW6(0) TLH (0) SBIASON Software Reset DC/DC function setting LED Pin function setting Power Control Main group current setting LED5 current setting LED6 current setting Main Current transition Measurement mode setting
00h 01h 02h 03h 04h 05h 06h 07h 08h 09h 0Ah 0Bh 0Ch 0Dh 0Eh 0Fh 10h 11h 12h 13h 14h 15h 16h 17h 18h 19h 1Ah 1Bh 1Ch 1Dh
W W W/R W W W W W W R W W W W W W W W W W W W W W W W W W W/R W
VOUT(1)
WPWMEN WPWMPOL THL (3) ADCYC (1) SOFS (3) FPWM IMLED(6) IW5(6) IW6(6) THL (2) ADCYC (0) SOFS (2) IU0 (6) IU1 (6) IU2 (6) IU3 (6) IU4 (6) IU5 (6) IU6 (6) IU7 (6) IU8 (6) IU9 (6) IUA (6) IUB (6) IUC (6) IUD (6) IUE (6) IUF (6) -
SGAIN (0) Measurement data adjustment AMB (0) IU0 (0) IU1 (0) IU2 (0) IU3 (0) IU4 (0) IU5 (0) IU6 (0) IU7 (0) IU8 (0) IU9 (0) IUA (0) IUB (0) IUC (0) IUD (0) IUE (0) IUF (0) CTH (0) OUT1MD OUT1EN Ambient level LED Current at Ambient level 0h LED Current at Ambient level 1h LED Current at Ambient level 2h LED Current at Ambient level 3h LED Current at Ambient level 4h LED Current at Ambient level 5h LED Current at Ambient level 6h LED Current at Ambient level 7h LED Current at Ambient level 8h LED Current at Ambient level 9h LED Current at Ambient level Ah LED Current at Ambient level Bh LED Current at Ambient level Ch LED Current at Ambient level Dh LED Current at Ambient level Eh LED Current at Ambient level Fh
Key driver 2 Value judging control setup
OUT, KBLT Output Mode setting OUT, KBLT Output Control
OUTSLP(1) OUTSLP(0) OUT, KBLT Slope setting
Input "0” for "-". A free address has the possibility to assign it to the register for the test. Access to the register for the test and the undefined register is prohibited.
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●Register Map Address 00h
Address 00h Initial Value
Technical Note
< Software Reset , DC/DC function setting >
R/W W 00h Bit7 VOUT(1) 0 Bit6 VOUT(0) 0 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 SFTRST 0 DCDCMD DCDCFON 0 0
Bit [7:6] : VOUT (1:0) VOUT Output Voltage setting “00” : VOUT Output Voltage 3.9V “01” : VOUT Output Voltage 4.2V “10” : VOUT Output Voltage 4.5V “11” : VOUT Output Voltage 4.8V Bit [5:4] : DCDCMD, DCDCFON DC/DC setting “00” : LED Pin Return “01” : LEDPin Return “10” : Output Voltage Fixation “11” : Output Voltage Fixation Bit [3:1] : (Not used) Bit0 : SFTRST Software Reset “0” : Reset cancel Reset(All register initializing) “1” : Refer to “The explanation of Reset” for detail.
Depend on LED ON/OFF Depend on LED ON/OFF Depend on LED ON/OFF Compulsion ON
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Technical Note
Address 01h < LED Pin function setting>
Address 01h Initial Value R/W W 42h Bit7 Bit6 Bit5 Bit4 Bit3 W6MD 0 Bit2 W5MD 0 Bit1 W4MD 1 Bit0 MLEDMD 0 WPWMEN WPWMPOL 0 1
Bit7 :
WPWMEN External PWM Input “WPWMIN” terminal Enable Control (Valid/Invalid) “0” : External PWM input invalid “1” : External PWM input valid Refer to “(11) Current Adjustment” of “The explanation of ALC” for detail. WPWMPOL Polarity setting of External PWM input "WPWMIN" terminal “0” : External PWM ’L’ drive “1” : External PWM ’H’ drive Refer to “(11) Current Adjustment” of “The explanation of ALC” for detail.
Bit6 :
Bit [5:4] : (Not used) Bit3 : W6MD LED6 control setting (individual / Main group) “0” : LED6 individual control “1” : LED6 Main group control Refer to “LED Driver” for detail. W5MD LED5 control setting (individual / Main group) “0” : LED5 individual control “1” : LED5 Use (Main group) Refer to “LED Driver” for detail. W4MD LED4 movement setting (unuse / use) “0” : LED4 unuse “1” : LED4 use (Main group Control) Refer to “LED Driver” for detail. MLEDMD Main group setting (Normal / ALC) “0” : Main group Normal Mode(ALCNon-reflection) “1” : Main group ALC Mode Refer to “(1) Auto Luminous Control ON/OFF” of “The explanation of ALC” for detail.
Bit2 :
Bit1 :
Bit0 :
Set up a fixation in every design because it isn't presumed W*PW that it is changed dynamically. And, do the setup of W*PW when each LED is Off.
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Technical Note
Address 02h < Power Control>
Address 02h Initial Value R/W W/R 00h Bit7 Bit6 Bit5 Bit4 Bit3 ALCEN 0 Bit2 W6EN 0 Bit1 W5EN 0 Bit0 MLEDEN 0
Bit [7:4] : (Not used) Bit3 : ALCEN “0” : “1” : W6EN “0” : “1” : W5EN “0” : “1” : ALC function Control (ON/OFF) ALC block OFF ALC block ON (Ambient Measurement) LED6 Control (ON/OFF) LED6 OFF LED6 ON(individual control) LED5 Control (ON/OFF) LED5 OFF LED5 ON(individual control)
Bit2 :
Bit1 :
Bit0 :
MLEDEN Main group LED Control (ON/OFF) “0” : Main group OFF “1” : Main group ON
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2011.04 - Rev.A
BD6088GUL
Technical Note
Address 03h < Main group LED Current setting(Normal Mode) >
Address 03h Initial Value R/W W 00h Bit7 Bit6 IMLED(6) 0 Bit5 IMLED(5) 0 Bit4 IMLED(4) 0 Bit3 IMLED(3) 0 Bit2 IMLED(2) 0 Bit1 IMLED(1) 0 Bit0 IMLED(0) 0
Bit7 :
(Not used) Main Group LED Current Setting at non-ALC mode
0.2 mA 0.4 mA 0.6 mA 0.8 mA 1.0 mA 1.2 mA 1.4 mA 1.6 mA 1.8 mA 2.0 mA 2.2 mA 2.4 mA 2.6 mA 2.8 mA 3.0 mA 3.2 mA 3.4 mA 3.6 mA 3.8 mA 4.0 mA 4.2 mA 4.4 mA 4.6 mA 4.8 mA 5.0 mA 5.2 mA 5.4 mA 5.6 mA 5.8 mA 6.0 mA 6.2 mA 6.4 mA 6.6 mA 6.8 mA 7.0 mA 7.2 mA 7.4 mA 7.6 mA 7.8 mA 8.0 mA 8.2 mA 8.4 mA 8.6 mA 8.8 mA 9.0 mA 9.2 mA 9.4 mA 9.6 mA 9.8 mA 10.0 mA 10.2 mA 10.4 mA 10.6 mA 10.8 mA 11.0 mA 11.2 mA 11.4 mA 11.6 mA 11.8 mA 12.0 mA 12.2 mA 12.4 mA 12.6 mA 12.8 mA “1000000” : “1000001” : “1000010” : “1000011” : “1000100” : “1000101” : “1000110” : “1000111” : “1001000” : “1001001” : “1001010” : “1001011” : “1001100” : “1001101” : “1001110” : “1001111” : “1010000” : “1010001” : “1010010” : “1010011” : “1010100” : “1010101” : “1010110” : “1010111” : “1011000” : “1011001” : “1011010” : “1011011” : “1011100” : “1011101” : “1011110” : “1011111” : “1100000” : “1100001” : “1100010” : “1100011” : “1100100” : “1100101” : “1100110” : “1100111” : “1101000” : “1101001” : “1101010” : “1101011” : “1101100” : “1101101” : “1101110” : “1101111” : “1110000” : “1110001” : “1110010” : “1110011” : “1110100” : “1110101” : “1110110” : “1110111” : “1111000” : “1111001” : “1111010” : “1111011” : “1111100” : “1111101” : “1111110” : “1111111” : 13.0 mA 13.2 mA 13.4 mA 13.6 mA 13.8 mA 14.0 mA 14.2 mA 14.4 mA 14.6 mA 14.8 mA 15.0 mA 15.2 mA 15.4 mA 15.6 mA 15.8 mA 16.0 mA 16.2 mA 16.4 mA 16.6 mA 16.8 mA 17.0 mA 17.2 mA 17.4 mA 17.6 mA 17.8 mA 18.0 mA 18.2 mA 18.4 mA 18.6 mA 18.8 mA 19.0 mA 19.2 mA 19.4 mA 19.6 mA 19.8 mA 20.0 mA 20.2 mA 20.4 mA 20.6 mA 20.8 mA 21.0 mA 21.2 mA 21.4 mA 21.6 mA 21.8 mA 22.0 mA 22.2 mA 22.4 mA 22.6 mA 22.8 mA 23.0 mA 23.2 mA 23.4 mA 23.6 mA 23.8 mA 24.0 mA 24.2 mA 24.4 mA 24.6 mA 24.8 mA 25.0 mA 25.2 mA 25.4 mA 25.6 mA
Bit [6:0] : IMLED (6:0)
“0000000” : “0000001” : “0000010” : “0000011” : “0000100” : “0000101” : “0000110” : “0000111” : “0001000” : “0001001” : “0001010” : “0001011” : “0001100” : “0001101” : “0001110” : “0001111” : “0010000” : “0010001” : “0010010” : “0010011” : “0010100” : “0010101” : “0010110” : “0010111” : “0011000” : “0011001” : “0011010” : “0011011” : “0011100” : “0011101” : “0011110” : “0011111” : “0100000” : “0100001” : “0100010” : “0100011” : “0100100” : “0100101” : “0100110” : “0100111” : “0101000” : “0101001” : “0101010” : “0101011” : “0101100” : “0101101” : “0101110” : “0101111” : “0110000” : “0110001” : “0110010” : “0110011” : “0110100” : “0110101” : “0110110” : “0110111” : “0111000” : “0111001” : “0111010” : “0111011” : “0111100” : “0111101” : “0111110” : “0111111” :
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17/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 04h < LED5 Current setting(Independence control) >
Address 04h Initial Value R/W W 00h Bit7 Bit6 IW5(6) 0 Bit5 IW5(5) 0 Bit4 IW5(4) 0 Bit3 IW5(3) 0 Bit2 IW5(2) 0 Bit1 IW5(1) 0 Bit0 IW5(0) 0
Bit7 :
(Not used) LED5 Current setting
“0000000” : “0000001” : “0000010” : “0000011” : “0000100” : “0000101” : “0000110” : “0000111” : “0001000” : “0001001” : “0001010” : “0001011” : “0001100” : “0001101” : “0001110” : “0001111” : “0010000” : “0010001” : “0010010” : “0010011” : “0010100” : “0010101” : “0010110” : “0010111” : “0011000” : “0011001” : “0011010” : “0011011” : “0011100” : “0011101” : “0011110” : “0011111” : “0100000” : “0100001” : “0100010” : “0100011” : “0100100” : “0100101” : “0100110” : “0100111” : “0101000” : “0101001” : “0101010” : “0101011” : “0101100” : “0101101” : “0101110” : “0101111” : “0110000” : “0110001” : “0110010” : “0110011” : “0110100” : “0110101” : “0110110” : “0110111” : “0111000” : “0111001” : “0111010” : “0111011” : “0111100” : “0111101” : “0111110” : “0111111” : 0.2 mA 0.4 mA 0.6 mA 0.8 mA 1.0 mA 1.2 mA 1.4 mA 1.6 mA 1.8 mA 2.0 mA 2.2 mA 2.4 mA 2.6 mA 2.8 mA 3.0 mA 3.2 mA 3.4 mA 3.6 mA 3.8 mA 4.0 mA 4.2 mA 4.4 mA 4.6 mA 4.8 mA 5.0 mA 5.2 mA 5.4 mA 5.6 mA 5.8 mA 6.0 mA 6.2 mA 6.4 mA 6.6 mA 6.8 mA 7.0 mA 7.2 mA 7.4 mA 7.6 mA 7.8 mA 8.0 mA 8.2 mA 8.4 mA 8.6 mA 8.8 mA 9.0 mA 9.2 mA 9.4 mA 9.6 mA 9.8 mA 10.0 mA 10.2 mA 10.4 mA 10.6 mA 10.8 mA 11.0 mA 11.2 mA 11.4 mA 11.6 mA 11.8 mA 12.0 mA 12.2 mA 12.4 mA 12.6 mA 12.8 mA “1000000” : “1000001” : “1000010” : “1000011” : “1000100” : “1000101” : “1000110” : “1000111” : “1001000” : “1001001” : “1001010” : “1001011” : “1001100” : “1001101” : “1001110” : “1001111” : “1010000” : “1010001” : “1010010” : “1010011” : “1010100” : “1010101” : “1010110” : “1010111” : “1011000” : “1011001” : “1011010” : “1011011” : “1011100” : “1011101” : “1011110” : “1011111” : “1100000” : “1100001” : “1100010” : “1100011” : “1100100” : “1100101” : “1100110” : “1100111” : “1101000” : “1101001” : “1101010” : “1101011” : “1101100” : “1101101” : “1101110” : “1101111” : “1110000” : “1110001” : “1110010” : “1110011” : “1110100” : “1110101” : “1110110” : “1110111” : “1111000” : “1111001” : “1111010” : “1111011” : “1111100” : “1111101” : “1111110” : “1111111” : 13.0 mA 13.2 mA 13.4 mA 13.6 mA 13.8 mA 14.0 mA 14.2 mA 14.4 mA 14.6 mA 14.8 mA 15.0 mA 15.2 mA 15.4 mA 15.6 mA 15.8 mA 16.0 mA 16.2 mA 16.4 mA 16.6 mA 16.8 mA 17.0 mA 17.2 mA 17.4 mA 17.6 mA 17.8 mA 18.0 mA 18.2 mA 18.4 mA 18.6 mA 18.8 mA 19.0 mA 19.2 mA 19.4 mA 19.6 mA 19.8 mA 20.0 mA 20.2 mA 20.4 mA 20.6 mA 20.8 mA 21.0 mA 21.2 mA 21.4 mA 21.6 mA 21.8 mA 22.0 mA 22.2 mA 22.4 mA 22.6 mA 22.8 mA 23.0 mA 23.2 mA 23.4 mA 23.6 mA 23.8 mA 24.0 mA 24.2 mA 24.4 mA 24.6 mA 24.8 mA 25.0 mA 25.2 mA 25.4 mA 25.6 mA
Bit [6:0] : IW5 (6:0)
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18/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 05h < LED6 Current setting(Independence control) >
Address 05h Initial Value R/W W 00h Bit7 Bit6 IW6(6) 0 Bit5 IW6(5) 0 Bit4 IW6(4) 0 Bit3 IW6(3) 0 Bit2 IW6(2) 0 Bit1 IW6(1) 0 Bit0 IW6(0) 0
Bit7 :
(Not used) LED6 Current setting
“0000000” : “0000001” : “0000010” : “0000011” : “0000100” : “0000101” : “0000110” : “0000111” : “0001000” : “0001001” : “0001010” : “0001011” : “0001100” : “0001101” : “0001110” : “0001111” : “0010000” : “0010001” : “0010010” : “0010011” : “0010100” : “0010101” : “0010110” : “0010111” : “0011000” : “0011001” : “0011010” : “0011011” : “0011100” : “0011101” : “0011110” : “0011111” : “0100000” : “0100001” : “0100010” : “0100011” : “0100100” : “0100101” : “0100110” : “0100111” : “0101000” : “0101001” : “0101010” : “0101011” : “0101100” : “0101101” : “0101110” : “0101111” : “0110000” : “0110001” : “0110010” : “0110011” : “0110100” : “0110101” : “0110110” : “0110111” : “0111000” : “0111001” : “0111010” : “0111011” : “0111100” : “0111101” : “0111110” : “0111111” : 0.2 mA 0.4 mA 0.6 mA 0.8 mA 1.0 mA 1.2 mA 1.4 mA 1.6 mA 1.8 mA 2.0 mA 2.2 mA 2.4 mA 2.6 mA 2.8 mA 3.0 mA 3.2 mA 3.4 mA 3.6 mA 3.8 mA 4.0 mA 4.2 mA 4.4 mA 4.6 mA 4.8 mA 5.0 mA 5.2 mA 5.4 mA 5.6 mA 5.8 mA 6.0 mA 6.2 mA 6.4 mA 6.6 mA 6.8 mA 7.0 mA 7.2 mA 7.4 mA 7.6 mA 7.8 mA 8.0 mA 8.2 mA 8.4 mA 8.6 mA 8.8 mA 9.0 mA 9.2 mA 9.4 mA 9.6 mA 9.8 mA 10.0 mA 10.2 mA 10.4 mA 10.6 mA 10.8 mA 11.0 mA 11.2 mA 11.4 mA 11.6 mA 11.8 mA 12.0 mA 12.2 mA 12.4 mA 12.6 mA 12.8 mA “1000000” : “1000001” : “1000010” : “1000011” : “1000100” : “1000101” : “1000110” : “1000111” : “1001000” : “1001001” : “1001010” : “1001011” : “1001100” : “1001101” : “1001110” : “1001111” : “1010000” : “1010001” : “1010010” : “1010011” : “1010100” : “1010101” : “1010110” : “1010111” : “1011000” : “1011001” : “1011010” : “1011011” : “1011100” : “1011101” : “1011110” : “1011111” : “1100000” : “1100001” : “1100010” : “1100011” : “1100100” : “1100101” : “1100110” : “1100111” : “1101000” : “1101001” : “1101010” : “1101011” : “1101100” : “1101101” : “1101110” : “1101111” : “1110000” : “1110001” : “1110010” : “1110011” : “1110100” : “1110101” : “1110110” : “1110111” : “1111000” : “1111001” : “1111010” : “1111011” : “1111100” : “1111101” : “1111110” : “1111111” : 13.0 mA 13.2 mA 13.4 mA 13.6 mA 13.8 mA 14.0 mA 14.2 mA 14.4 mA 14.6 mA 14.8 mA 15.0 mA 15.2 mA 15.4 mA 15.6 mA 15.8 mA 16.0 mA 16.2 mA 16.4 mA 16.6 mA 16.8 mA 17.0 mA 17.2 mA 17.4 mA 17.6 mA 17.8 mA 18.0 mA 18.2 mA 18.4 mA 18.6 mA 18.8 mA 19.0 mA 19.2 mA 19.4 mA 19.6 mA 19.8 mA 20.0 mA 20.2 mA 20.4 mA 20.6 mA 20.8 mA 21.0 mA 21.2 mA 21.4 mA 21.6 mA 21.8 mA 22.0 mA 22.2 mA 22.4 mA 22.6 mA 22.8 mA 23.0 mA 23.2 mA 23.4 mA 23.6 mA 23.8 mA 24.0 mA 24.2 mA 24.4 mA 24.6 mA 24.8 mA 25.0 mA 25.2 mA 25.4 mA 25.6 mA
Bit [6:0] : IW6 (6:0)
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19/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 06h < Main Current slope time setting >
Address 06h Initial Value R/W W C7h Bit7 THL(3) 1 Bit6 THL(2) 1 Bit5 THL(1) 0 Bit4 THL(0) 0 Bit3 TLH(3) 0 Bit2 TLH(2) 1 Bit1 TLH(1) 1 Bit0 TLH(0) 1
Bit [7:4] : THL (3:0) Main LED current Down transition per 0.2mA step “0000” : 0.256 ms “0001” : 0.512 ms “0010” : 1.024 ms “0011” : 2.048 ms “0100” : 4.096 ms “0101” : 8.192 ms “0110” : 16.38 ms “0111” : 32.77 ms “1000” : 65.54 ms “1001” : 131.1 ms “1010” : 196.6 ms “1011” : 262.1 ms “1100” : 327.7 ms (Initial value) “1101” : 393.2 ms “1110” : 458.8 ms “1111” : 524.3 ms Setting time is counted based on the switching frequency of Charge Pump. The above value becomes the value of the Typ (1MHz) time. Refer to “(9) Slope Process” of “The explanation of ALC” for detail.
Bit [3:0] : TLH (3:0) Main LED current Up transition per 0.2mA step “0000” : 0.256 ms “0001” : 0.512 ms “0010” : 1.024 ms “0011” : 2.048 ms “0100” : 4.096 ms “0101” : 8.192 ms “0110” : 16.38 ms “0111” : 32.77 ms (Initial value) “1000” : 65.54 ms “1001” : 131.1 ms “1010” : 196.6 ms “1011” : 262.1 ms “1100” : 327.7 ms “1101” : 393.2 ms “1110” : 458.8 ms “1111” : 524.3 ms Setting time is counted based on the switching frequency of Charge Pump. The above value becomes the value of the Typ (1MHz) time. Refer to “(9) Slope Process” of “The explanation of ALC” for detail.
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20/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 07h
Address 07h Initial Value
< ALC mode setting >
R/W W 81h Bit7 Bit6 Bit5 GAIN(1) 0 Bit4 GAIN(0) 0 Bit3 STYPE 0 Bit2 VSB 0 Bit1 MDCIR 0 Bit0 SBIASON 1 ADCYC(1) ADCYC(0) 1 0
Bit [7:6] : ADCYC(1:0) ADC Measurement Cycle “00” : 0.52 s “01” : 1.05 s “10” : 1.57 s (Initial value) “11” : 2.10 s Refer to “(4) A/D conversion” of “The explanation of ALC” for detail. Bit [5:4] : GAIN(1:0) Sensor Gain Switching Function Control (This is effective only at STYPE=“0”.) “00” : Auto Change (Initial value) “01” : High “10” : Low “11” : Fixed Refer to “(3) Gain control” of “The explanation of ALC” for detail. Bit3 : STYPE Ambient Light Sensor Type Select (Linear/Logarithm) “0” : For Linear sensor (Initial value) “1” : For Log sensor Refer to “(7) Ambient level detection” of “The explanation of ALC” for detail. VSB SBIAS Output Voltage Control “0” : SBIAS output voltage 3.0V (Initial value) “1” : SBIAS output voltage 2.6V Refer to “(2) I/V conversion” of “The explanation of ALC” for detail. MDCIR LED Current Reset Select by Mode Change “0” : LED current non-reset when mode change (Initial value) “1” : LED current reset when mode change Refer to “(10) LED current reset when mode change” of “The explanation of ALC” for detail. SBIASON “0” : Measurement cycle synchronous “1” : Usually ON (at ALCEN=1) (Initial value) Refer to “(4) A/D conversion” of “The explanation of ALC” for detail.
Bit2 :
Bit1 :
Bit0 :
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21/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 08h < ADC Data adjustment >
Address 08h Initial Value R/W W 00h Bit7 SOFS(3) 0 Bit6 SOFS(2) 0 Bit5 SOFS(1) 0 Bit4 SOFS(0) 0 Bit3 SGAIN(3) 0 Bit2 SGAIN(2) 0 Bit1 SGAIN(1) 0 Bit0 SGAIN(0) 0
Bit [7:4] : SOFS (3:0) “1000” : “1001” : “1010” : “1011” : “1100” : “1101” : “1110” : “1111” : “0000” : “0001” : “0010” : “0011” : “0100” : “0101” : “0110” : “0111” :
ADC Data Offset adjustment -8 LSB -7 LSB -6 LSB -5 LSB -4 LSB -3 LSB -2 LSB -1 LSB no adjustment +1 LSB +2 LSB +3 LSB +4 LSB +5 LSB +6 LSB +7 LSB
Offset adjust is performed to ADC data. Refer to “(5) ADC data Gain/offset adjustment” of “The explanation of ALC” for detail.
Bit [3:0] : SGAIN (3:0) ADC Data Inclination adjustment “1000” : reserved “1001” : reserved “1010” : -37.50% “1011” : -31.25% “1100” : -25.00% “1101” : -18.75% “1110” : -12.50% “1111” : -6.25% “0000” : no adjustment “0001” : +6.25% “0010” : +12.50% “0011” : +18.75% “0100” : +25.00% “0101” : +31.25% “0110” : +37.50% “0111” : reserved Gain adjust is performed to ADC data. The data after adjustment are round off by 8-bit data. Refer to “(5) ADC data Gain/offset adjustment” of “The explanation of ALC” for detail.
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22/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 09h < Ambient level (Read Only) >
Address 09h Initial Value R/W R (00h) Bit7 Bit6 Bit5 Bit4 Bit3 AMB(3) (0) Bit2 AMB(2) (0) Bit1 AMB(1) (0) Bit0 AMB(0) (0)
Bit [7:4] : (Not used) Bit [3:0] : AMB (3:0) “0000” : “0001” : “0010” : “0011” : “0100” : “0101” : “0110” : “0111” : “1000” : “1001” : “1010” : “1011” : “1100” : “1101” : “1110” : “1111” : Ambient Level 0h 1h 2h 3h 4h 5h 6h 7h 8h 9h Ah Bh Ch Dh Eh Fh
It begins to read Ambient data through I2C, and possible. To the first AD measurement completion, it is AMB(3:0)=0000. Refer to “(7) Ambient level detection” of “The explanation of ALC” for detail.
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23/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 0Ah~19h < Ambient LED Current setting >
Address 0Ah~19h Initial Value R/W W Bit7 IU*(7) Bit6 IU*(6) Bit5 IU*(5) Bit4 IU*(4) Bit3 IU*(3) Bit2 IU*(2) Bit1 IU*(1) Bit0 IU*(0)
Refer to after page for initial table.
“*” means 0~F. Bit7 : (Not used) Main Current at Ambient Level for 0h~Fh
“0000000” : “0000001” : “0000010” : “0000011” : “0000100” : “0000101” : “0000110” : “0000111” : “0001000” : “0001001” : “0001010” : “0001011” : “0001100” : “0001101” : “0001110” : “0001111” : “0010000” : “0010001” : “0010010” : “0010011” : “0010100” : “0010101” : “0010110” : “0010111” : “0011000” : “0011001” : “0011010” : “0011011” : “0011100” : “0011101” : “0011110” : “0011111” : “0100000” : “0100001” : “0100010” : “0100011” : “0100100” : “0100101” : “0100110” : “0100111” : “0101000” : “0101001” : “0101010” : “0101011” : “0101100” : “0101101” : “0101110” : “0101111” : “0110000” : “0110001” : “0110010” : “0110011” : “0110100” : “0110101” : “0110110” : “0110111” : “0111000” : “0111001” : “0111010” : “0111011” : “0111100” : “0111101” : “0111110” : “0111111” : 0.2 mA 0.4 mA 0.6 mA 0.8 mA 1.0 mA 1.2 mA 1.4 mA 1.6 mA 1.8 mA 2.0 mA 2.2 mA 2.4 mA 2.6 mA 2.8 mA 3.0 mA 3.2 mA 3.4 mA 3.6 mA 3.8 mA 4.0 mA 4.2 mA 4.4 mA 4.6 mA 4.8 mA 5.0 mA 5.2 mA 5.4 mA 5.6 mA 5.8 mA 6.0 mA 6.2 mA 6.4 mA 6.6 mA 6.8 mA 7.0 mA 7.2 mA 7.4 mA 7.6 mA 7.8 mA 8.0 mA 8.2 mA 8.4 mA 8.6 mA 8.8 mA 9.0 mA 9.2 mA 9.4 mA 9.6 mA 9.8 mA 10.0 mA 10.2 mA 10.4 mA 10.6 mA 10.8 mA 11.0 mA 11.2 mA 11.4 mA 11.6 mA 11.8 mA 12.0 mA 12.2 mA 12.4 mA 12.6 mA 12.8 mA “1000000” : “1000001” : “1000010” : “1000011” : “1000100” : “1000101” : “1000110” : “1000111” : “1001000” : “1001001” : “1001010” : “1001011” : “1001100” : “1001101” : “1001110” : “1001111” : “1010000” : “1010001” : “1010010” : “1010011” : “1010100” : “1010101” : “1010110” : “1010111” : “1011000” : “1011001” : “1011010” : “1011011” : “1011100” : “1011101” : “1011110” : “1011111” : “1100000” : “1100001” : “1100010” : “1100011” : “1100100” : “1100101” : “1100110” : “1100111” : “1101000” : “1101001” : “1101010” : “1101011” : “1101100” : “1101101” : “1101110” : “1101111” : “1110000” : “1110001” : “1110010” : “1110011” : “1110100” : “1110101” : “1110110” : “1110111” : “1111000” : “1111001” : “1111010” : “1111011” : “1111100” : “1111101” : “1111110” : “1111111” : 13.0 mA 13.2 mA 13.4 mA 13.6 mA 13.8 mA 14.0 mA 14.2 mA 14.4 mA 14.6 mA 14.8 mA 15.0 mA 15.2 mA 15.4 mA 15.6 mA 15.8 mA 16.0 mA 16.2 mA 16.4 mA 16.6 mA 16.8 mA 17.0 mA 17.2 mA 17.4 mA 17.6 mA 17.8 mA 18.0 mA 18.2 mA 18.4 mA 18.6 mA 18.8 mA 19.0 mA 19.2 mA 19.4 mA 19.6 mA 19.8 mA 20.0 mA 20.2 mA 20.4 mA 20.6 mA 20.8 mA 21.0 mA 21.2 mA 21.4 mA 21.6 mA 21.8 mA 22.0 mA 22.2 mA 22.4 mA 22.6 mA 22.8 mA 23.0 mA 23.2 mA 23.4 mA 23.6 mA 23.8 mA 24.0 mA 24.2 mA 24.4 mA 24.6 mA 24.8 mA 25.0 mA 25.2 mA 25.4 mA 25.6 mA
Bit [6:0] : IU* (6:0)
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24/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 1Ah < Key Driver 2 value decision control setting >
Address 1Ah Initial Value R/W W 2Ah Bit7 Bit6 Bit5 CHYS(1) 1 Bit4 CHYS(0) 0 Bit3 CTH(3) 1 Bit2 CTH(2) 0 Bit1 CTH(1) 1 Bit0 CTH(0) 0
Bit [7:6] : (Not used) Bit [5:4] : CHYS(1:0) Key DriverON Brightness hysteresis “00” : Ambient 1h Width “01” : Ambient 2h Width “10” : Ambient 3h Width (initial) “11” : Ambient 4h Width Refer to “(12) Key back light value decision” of “The explanation of ALC” for detail. Bit [3:0] : CTH (3:0) Key DriverOFF Brightness threshold “0000” : Ambient level 0h OFF “0001” : Ambient level 1h OFF “0010” : Ambient level 2h OFF “0011” : Ambient level 3h OFF “0100” : Ambient level 4h OFF “0101” : Ambient level 5h OFF “0110” : Ambient level 6h OFF “0111” : Ambient level 7h OFF “1000” : Ambient level 8h OFF “1001” : Ambient level 9h OFF “1010” : Ambient level Ah OFF (initial) “1011” : Ambient level Bh OFF “1100” : Ambient level Ch OFF “1101” : Ambient level Dh OFF “1110” : Ambient level Eh OFF “1111” : Ambient level Fh OFF Refer to “(12) Key back light value decision” of “The explanation of ALC” for detail.
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Technical Note
Address 1Bh < OUT KEY Output Mode setting >
Address 1Bh Initial Value R/W W 00h Bit7 Bit6 Bit5 Bit4 KBMD 0 Bit3 OUT4MD 0 Bit2 OUT3MD 0 Bit1 OUT2MD 0 Bit0 OUT1MD 0
Bit [7:5] : (Not used) Bit4 : KBMD Key back light mode choice (ALC/ Individual) “0” : KBLT ALC Control “1” : KBLT Individual Control Refer to “(13) Key back light PWM control” of “The explanation of “ ALC” for detail. OUT4MD OUTCNT External Control setting “0” : OUTCNT invalid, OUT4 output depends on output control by OUT4EN. “1” : OUT4 output depends on output control by OUT4EN with OUTCNT=H. With OUTCNT=L, OUT4=Hi-z (compulsory off). Refer to “The explanation of OUTPWM control” for detail. OUT3MD OUTCNT External Control setting “0” : OUTCNT invalid, OUT3 output depends on output control by OUT3EN. “1” : OUT3 output depends on output control by OUT3EN with OUTCNT=H. With OUTCNT=L, OUT3=Hi-z (compulsory off). Refer to “The explanation of OUTPWM control” for detail. OUT2MD OUTCNT External Control setting “0” : OUTCNT invalid, OUT2 output depends on output control by OUT2EN. “1” : OUT2 output depends on output control by OUT2EN with OUTCNT=H. With OUTCNT=L, OUT2=Hi-z (compulsory off). Refer to “The explanation of OUTPWM control” for detail. OUT1MD OUTCNT External Control setting “0” : OUTCNT invalid, OUT1 output depends on output control by OUT1EN. “1” : OUT1 output depends on output control by OUT1EN with OUTCNT=H. With OUTCNT=L, OUT1=Hi-z (compulsory off). Refer to “The explanation of OUTPWM control” for detail.
Bit3 :
Bit2 :
Bit1 :
Bit0 :
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Technical Note
Address 1Ch < OUT KEY Output level setting >
Address 1Ch Initial Value R/W W/R 00h Bit7 Bit6 Bit5 Bit4 KBEN 0 Bit3 OUT4EN 0 Bit2 OUT3EN 0 Bit1 OUT2EN 0 Bit0 OUT1EN 0
Bit [7:5] : (Not used) Bit4 : KBEN KBLT output level setting (non-ALC mode) “0” : KBLT L 出力 “1” : KBLT H 出力 Refer to “(13) Key back light PWM control” of “The explanation of ALC” for detail. OUT4EN OUT4 Output level setting “0” : OUT4 Hi-Z Output “1” : OUT4 L Output Refer to “The explanation of OUTPWM control” for detail. OUT3EN OUT3 Output level setting “0” : OUT3 Hi-Z Output “1” : OUT3 L Output Refer to “The explanation of OUTPWM control” for detail. OUT2EN OUT2 Output level setting “0” : OUT2 Hi-Z Output “1” : OUT2 L Output Refer to “The explanation of OUTPWM control” for detail.. OUT1EN OUT1Output level setting “0” : OUT1 Hi-Z Output “1” : OUT1 L Output Refer to “The explanation of OUTPWM control” for detail.
Bit3 :
Bit2 :
Bit1 :
Bit0 :
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Technical Note
Address 1Dh
Address 1Dh Initial Value
< OUT KEY Output Mode setting >
R/W W 00h Bit7 FPWM 0 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 KBSLP (1) KBSLP (0) OUTSLP(1) OUTSLP(0) 0 0 0 0
Bit7 :
FPWM Key Driver, OUT1～4 PWM cycle setting “0” : 2.048 ms “1” : 4.096 ms Refer to “(13) Key back light PWM control” of “The explanation of ALC” and “The explanation of OUTPWM control” for detail.
Bit [6:4] : (未使用) Bit [3:2] : KBSLP(1:0) The slope time of around 1step for Key Driver PWM FPWM=0 FPWM=1 “00” : 0.00 ms 0.00 ms “01” : 16.38 ms 32.77 ms “10” : 32.77 ms 65.54 ms “11” : 65.54 ms 131.08 ms Refer to “(13) Key back light PWM control” of “The explanation of ALC” for detail. Bit [1:0] : OUTSLP(1:0) The slope time of around 1step for OUT1～4 PWM FPWM=0 FPWM=1 “00” : 0.00 ms 0.00 ms “01” : 16.38 ms 32.77 ms “10” : 32.77 ms 65.54 ms “11” : 65.54 ms 131.08 ms Refer to “The explanation of OUTPWM control” for detail.
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●Reset
Technical Note
There are two kinds of reset, software reset and hardware reset (1) Software reset ・All the registers are initialized by SFTRST="1". ・SFTRST is an automatically returned to "0". (Auto Return 0). (2) Hardware reset ・It shifts to hardware reset by changing RESETB pin “H” → “L”. ・The condition of all the registers under hardware reset pin is returned to the initial value, and it stops accepting all address. ・It’s possible to release from a state of hardware reset by changing RESETB pin “L” → “H”. ・RESETB pin has delay circuit. It doesn’t recognize as hardware reset in “L” period under 5μs. (3) Reset Sequence ・When hardware reset was done during software reset, software reset is canceled when hardware reset is canceled. (Because the initial value of software reset is “0”)
●VIODET The decline of the VIO voltage is detected, and faulty operation inside the LSI is prevented by giving resetting to Levelsift block Image Block Diagram
VIO VBAT
DEToutput
Inside reset
2.6V
VBAT
Reset by VIODET
(typ)1.0V
VIO
VIODET
RESETB R Digital pin I/O LEVEL SHIFT
RESETB
DET output
Inside reset
When the VIO voltage becomes more than typ1.0V(Vth of NMOS in the IC), VIODET is removed. On the contrary, when VIO is as follows 1.0V, it takes reset.(The VBAT voltage being a prescribed movement range)
●thermal shutdown A thermal shutdown function is effective in the following block. DC/DC (Charge Pump) LED Driver SBIAS The thermal shutdown function is detection temperature that it works is about 195℃. o Detection temperature has a hysteresis, and detection release temperature is about 175 C. (Design reference value)
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Technical Note
●DC/DC Explanation for operate Start DC/DC circuit operates when any LED turns ON. (DCDCFON=0) When the start of theDC/DC circuit is done, it has the soft start function to prevent a rush current. Force of VBAT and VIO is to go as follows. DCDCMD=1 must be set in the fixed voltage mode and DCDCMD=DCDCFON=1 must be set when DCDC output takes place regardless of LEDs.
V BAT
V IO T VIOON=min 0.1ms RESETB T RSTB=min 0.1ms T RST=min 0ms E N (*) T SO FT V OUT T VIOOFF=min 0.1ms
LEDcurrent
(*) An EN signal means the following in the upper figure. EN = “MLEDEN” or “W＊EN” (= LED The LED lighting control of a setup of connection VOUT) But, as for Ta > TTSD (typ : 195° C), a protection function functions, and an EN signal doesn't become effective. TSOFT changes by the capacitor connected to VOUT and inside OSC. TSOFT is Typ 200μs (when the output capacitor of VOUT =1.0μF).
Over Voltage protection / Over Current protection DC/DC circuit output (VOUT) is equipped with the over-voltage protection and the over current protection function. A VOUT over-voltage detection voltage is about 6.0V(typ). (VOUT at the time of rise in a voltage) A detection voltage has a hysteresis, and a detection release voltage is about 5.1V(typ). And, when VOUT output short to ground, input current of the battery terminal is limited by an over current protection function.
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Technical Note
Mode transition The transition of boosts multiple transits automatically by VBAT Voltage and the VOUT Pin Voltage.
STANDBY
1 condition○
ALL off MLEDEN=”1” or W*EN=”1”
1 ○
and Ta1.5V(typ), 128us(typ) wait
X1.0
CP x1.0 mode
mode down=”H”
mode up=”H”
X1.5
CP x1.5 mode
mode down=”H”
mode up=”H”
X2.0
CP x2.0 mode
The mode transition of the charge pump works as follows.
＜x1.0→x1.5→x2.0 Mode transition＞ The transition of the mode is done when VOUT was compared with VBAT and the next condition was satisfied.
x1.0→x1.5 Mode transition VBAT ≤ VOUT + (Ron10×Iout) (LED Pin feedback：VOUT = Vf+0.2(Typ)) x1.5→x2.0 Mode transition VBAT×1.5 ≤ VOUT +(Ron15×Iout) (LED Pin feedback：VOUT = Vf+0.2(Typ)) Ron10: x1 Charge pump on resistance 1.2Ω(Typ) Ron15: x1.5 Charge pump on resistance 7.1Ω(Typ)
＜x2.0→x1.5→x1.0 Mode transition＞ The transition of the mode is done when the ratio of VOUT and VBAT is detected and it exceeds a fixed voltage ratio.
x1.5→x1.0 Mode transition VBAT / VOUT =1.16(Design value) x2.0→x1.5 Mode transition VBAT / VOUT =1.12(Design value)
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Technical Note
●LED Driver The LED driver of 6ch is constructed as the ground plan. Equivalence control is possible with LED1 - 4(LED4 can choose use/un-use with a register W4MD.). LED5, LED6 is controllable individually. As for LED5, LED6, grouping setting to the main control is possible, and main control becomes effective for the main group in the allotment. LED5 and LED6 are setups of grouping to the main control. When LED5 and LED6 are used by the individual control, a slope time setup (register THL and TLH) doesn't become effective.
LED1
IMLED[6:0] MLEDEN MLEDMD WPWMIN
LED2
LED3
LED4
W4MD
1
LED5
IW5[6:0] W5EN
0
W5MD
1
LED6
IW6[6:0] W6EN
0
W6MD
●General-purpose Output Ports General-purpose Output Ports 4ch is constructed as the ground plan.
VGPO
GPO Slope Control GPO Slope Control
VLED
Vf
OUT*
OUT*
When OUT* is used with Pull Up.
When OUT* is used with LED.
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Technical Note
●The explanation of ALC (Auto Luminous Control) LCD backlight current adjustment is possible in the basis of the data detected by external ambient light sensor. ・Extensive selection of the ambient light sensors (Photo Diode, Photo Transistor, Photo IC(linear/logarithm)) is possible by building adjustment feature of Sensor bias, gain adjustment and offset adjustment. ・Ambient data is changed into ambient level by digital data processing, and it can be read through I2C I/F. ・Register setting can customize a conversion to LED current. (Initial value is pre-set.) ・ Natural dimming of LED driver is possible with the adjustment of the current transition speed. ・ON/ off of the key back light can be controlled automatically by the brightness.
Usually ON / intermittent
PWM enabling
PWM Polarity switching
Sensor Offset Correction
WPWMIN
Slope Timer LIN/LOG Conversion Mode Select
SBIAS
SBIAS
Sensor Gain Correction
LED* LCD Backlight
Sensor SSENS ADC
Data Correction
Average Logarithmic Conv. Ambient Level
Current Conversion
Slope process
VBAT
DC current setup
Main Group
setup
・・
GC1 GC2
Gain Control
2 value decision
Threshold Hysteresis
PWM process
Mode Select Slope Timer PWM Cycle
KBLT Key Backlight
Gain Control ON/OFF
Ambient Level
: Effective also in ALC functional the case of not using it
(1) Auto Luminous Control ON/OFF ・ALC block can be independent setting ON/OFF. ・It can use only to measure the Ambient level. Register : ALCEN Register : MLEDEN Register : MLEDMD ・Refer to under about the associate ALC mode and Main LED current. ALCEN 0 0 0 1 1 1 MLEDEN 0 1 1 0 1 1 MLEDMD x 0 1 x 0 1 Sensor I/F OFF ( AMB(3:0)=0h ) ON LED control OFF ON OFF ON ALC mode Mode OFF Non ALC mode Main LED current IMLED(6:0) IU0(6:0) (*1) IMLED(6:0) ALC mode (*2)
(*1) At this mode, because Sensor I/F is OFF, AMB(3:0)=0h. So, Main LED current is selected IU0(6:0). (*2) At this mode, Main LED current is selected IU0(6:0)~IUF(6:0) It becomes current value corresponding to each brightness.
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(2) I/V conversion ・The bias voltage and external resistance for the I-V conversion (Rs) are adjusted with adaptation of sensor characteristic ・The bias voltage is selectable by register setup. Register : VSB “0” : SBIAS output voltage 3.0V “1” : SBIAS output voltage 2.6V
Technical Note
Sensor Current (Iout)
Ambient
SBIAS
SSENS voltage VCC
SBIAS
VSSENS Iout
IOUT
SSENS Voltage (=Iout x Rs)
Sensor IC
A/D
SSENS
Rs is large
GND
Rs
SGND
BD6088GUL
Rs : Sense resistance (A sensor output current is changed into the voltage value.) SBIAS : Bias power supply terminal for the sensor (3.0V / 2.6V by register setting) SSENS : Sense voltage input terminal
Rs is small
Ambient
SSENS Voltage = Iout x Rs
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(3) Gain control ・Sensor gain switching function is built in to extend the dynamic range. ・It is controlled by register setup. ・When automatic gain control is off, the gain status can be set upin the manual. Register : GAIN(1:0) ・GC1 and GC2 are outputted corresponding to each gain status.
Technical Note
SSENS Voltage
High Gain mode
Low Gain mode
Ambient
SSENS Voltage
Auto Gain mode
Ambient
Example 1 (Use BH1600FVC) Example 2 Example 3
SBIAS
SBIAS
SBIAS
VCC IOUT
SSENS
SSENS
SSENS
9.5 (*1)
Applicationexample
BH1600
GC1 GC2 GC1 GC2 SGND
１
GC1 GC2 SGND
GC1 GC2 SGND
GND
Resister values are relative
Operating mode GAIN(1:0) setting Gain status GC1 output GC2 output
(*1)
Auto 00 High Low L L
Manual High Low 01 10 High Low L L
Auto 00 High Low L L
Manual High Low 01 10 High Low L L
Fixed 11 L
: This means that it becomes High with A/D measurement cycle synchronously. : Set up the relative ratio of the resistance in the difference in the brightness change of the High Gain mode and the Low Gain mode carefully.
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Technical Note
(4) A/D conversion ・The detection of ambient data is done periodically for the low power. ・SBIAS and ADC are turned off except for the ambient measurement. ・The sensor current may be shut in this function, it can possible to decrease the current consumption. ・SBIAS pin and SSENS pin are pull-down in internal when there are OFF. ・SBIAS circuit has the two modes. (Usually ON mode or intermittent mode) Register : ADCYC(1:0) Register : SBIASON
ALCEN ADCYC(1:0)
16 times
ADC Cycle
SBIAS Output
Twait= 64ms(typ)
ADC Movement
(Wait time)
W hen SBIASON=1
TAD= 16.4ms(typ)
(A/D conversion time)
AD start signal
GC1, GC2=00
GC1, GC2
TADone= 1.024ms(typ)
AMB(3:0) AMB(3:0)
16 times measurement
Toprt= 80.4ms(typ)
(Operate time)
(5) ADC data Gain / offset adjustment ・To correct the characteristic dispersion of the sensor, Gain and offset adjustment to ADC output data is possible. ・They are controlled by register setup. Register : SGAIN(3:0) Register : SOFS(3:0) < Gain Adjustment >
SSENS Voltage SSENS Voltage SSENS Voltage Ambient
Gain adjustment SGAIN(3:0)
Ambient
Ambient
< Offset Adjustment >
SSENS Voltage SSENS Voltage SSENS Voltage
Offset adjustment SOFS(3:0)
Ambient
Ambient
Ambient
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Technical Note
(6) Average filter ・Average filter is built in to rid noise or flicker. ・Average is 16 times
(7) Ambient level detection ・Averaged A/D value is converted to Ambient level corresponding to Gain control and sensor type. ・Ambient level is judged to rank of 16 steps by ambient data. ・The type of ambient light sensor can be chosen by register. (Linear type sensor / Logarithm type sensor) Register : STYPE “0” : For Linear sensor “1” : For Log sensor ・Ambient level is output through I2C. Register : AMB(3:0) STYPE GAIN(1:0) GAIN Ambient Level 0h 1h 2h 3h 4h 5h 6h 7h 8h 9h Ah Bh Ch Dh Eh Fh VoS×0/256 VoS×1/256 VoS×2/256 VoS×3/256 VoS×4/256 VoS×6/256 VoS×7/256 VoS×11/256 VoS×12/256 VoS×20/256 VoS×21/256 VoS×36/256 VoS×37/256 VoS×64/256 VoS×65/256 VoS×114/256 VoS×115/256 VoS×199/256 VoS×200/256 VoS×255/256 VoS×0/256 VoS×1/256 VoS×2/256 VoS×3/256 VoS×4/256 VoS×5/256 VoS×7/256 VoS×8/256 VoS×12/256 VoS×13/256 VoS×21/256 VoS×22/256 VoS×37/256 VoS×38/256 VoS×65/256 VoS×66/256 VoS×113/256 VoS×114/256 VoS×199/256 VoS×200/256 VoS×255/256 Low 00 High 0 10 Low 01 High 11 1 xx -
SSENS Voltage VoS×0/256 VoS×1/256 VoS×2/256 VoS×3/256 VoS×4/256 VoS×5/256 VoS×7/256 VoS×8/256 VoS×12/256 VoS×13/256 VoS×21/256 VoS×22/256 VoS×37/256 VoS×38/256 VoS×65/256 VoS×66/256 VoS×113/256 VoS×114/256 VoS×199/256 VoS×200/256 VoS×255/256 VoS×0/256 VoS×1/256 VoS×2/256 VoS×3/256 VoS×4/256 VoS×5/256 VoS×6/256 VoS×7/256 VoS×9/256 VoS×10/256 VoS×13/256 VoS×14/256 VoS×19/256 VoS×20/256 VoS×27/256 VoS×28/256 VoS×38/256 VoS×39/256 VoS×53/256 VoS×54/256 VoS×74/256 VoS×75/256 VoS×104/256 VoS×105/256 VoS×144/256 VoS×145/256 VoS×199/256 VoS×200/256 VoS×255/256 VoS×0/256 VoS×17/256 VoS×18/256 VoS×26/256 VoS×27/256 VoS×36/256 VoS×37/256 VoS×47/256 VoS×48/256 VoS×59/256 VoS×60/256 VoS×71/256 VoS×72/256 VoS×83/256 VoS×84/256 VoS×95/256 VoS×96/256 VoS×107/256 VoS×108/256 VoS×119/256 VoS×120/256 VoS×131/256 VoS×132/256 VoS×143/256 VoS×144/256 VoS×155/256 VoS×156/256 VoS×168/256 VoS×169/256 VoS×181/256 VoS×182/256 VoS×255/256
VoS×0/256 VoS×1/256 VoS×2/256 VoS×3/256 VoS×4/256 VoS×6/256 VoS×7/256 VoS×11/256 VoS×12/256 VoS×20/256 VoS×21/256 VoS×36/256 VoS×37/256 VoS×64/256 VoS×65/256 VoS×114/256 VoS×115/256 VoS×199/256 VoS×200/256 VoS×255/256
・This is in case of not adjustments of the gain/offset control. ・In the Auto Gain control mode, sensor gain changes in gray-colored ambient level. ・“ ⁄ ” : This means that this zone is not outputted in this mode.
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Technical Note
Main LED current
(8) LED current assignment ・LED current can be assigned as each of 16 steps of the ambient level. ・Setting of a user can do by overwriting, though it prepares for the table setup in advance. Register : IU*(6:0)
Conversion table can be changed
Ambient Level Conversion Table (initial value) Ambient Level 0h 1h 2h 3h 4h 5h 6h 7h Setting data 11h 13h 15h 18h 1Eh 25h 2Fh 3Bh Current value 3.6mA 4.0mA 4.4mA 5.0mA 6.2mA 7.6mA 9.6mA 12.0mA Ambient Level 8h 9h Ah Bh Ch Dh Eh Fh Setting data 48h 56h 5Fh 63h 63h 63h 63h 63h Current value 14.6mA 17.4mA 19.2mA 20.0mA 20.0mA 20.0mA 20.0mA 20.0mA
Main LED current
(9) Slope process ・Slope process is given to LED current to dim naturally. ・LED current changes in the 256Step gradation in sloping. ・Up(dark→bright),Down(bright→dark) LED current transition speed are set individually. Register : THL(3:0) Register : TLH(3:0) ・Main LED current changes as follows at the time as the slope. TLH (THL) is setup of time of the current step 2/256.
Current Data which is set LED Current
TLH(3:0)
THL (3:0)
TLH
Up/Down transition Speed is set individually
25.6mA =0.1mA 256
THL
time Zoom
Main LED current
TLH(3:0)
time
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(10) LED current reset when mode change ・When mode is changed (ALC↔Non ALC), it can select the way to sloping. Register : MDCIR “0” : LED current non-reset when mode change “1” : LED current reset when mode change
Technical Note
NonALC mode
ALC mode
NonALC mode
NonALC mode
ALC mode
NonALC mode
IMLED(6:0)
Main LED current
IU*(6:0)
Main LED current
IMLED(6:0)
IMLED(6:0)
IMLED(6:0) IU*(6:0)
MDCIR= “0”
MDCIR= “1”
0mA
0mA
time
time
(11) Current adjustment ・When the register setting permits it, PWM drive by the external terminal (WPWMIN) is possible. B it Name : WPWMEN ・It is suitable for the intensity correction by external control, because PWM based on Main LED current of register setup or ALC control. WPWMEN (Register) 0 1 WPWMIN(External Pin) WPWMPOL=H WPWMPOL=L (Register) (Register) L H H L L H H L Main group LED current Normal operation Normal operation Forced OFF Normal operation
" Normal operation " depends on the setup of each register.
E N (* ) I n te r n a l S o ft-S ta rt T im e
D C /D C
O u tp u t
W P W M IN
in p u t
W PW M E N
L E D C u rre n t
E N (* ) :
it m e a n s “M L E D E N ” o r “W *E N ”.
It is p o s s ib le to m a k e it a W P W M IN in p u t a n d W P W M E N = 1 in fr o n t o f E N (*) . A P W M d r iv e b e c o m e s e ffe c tiv e a fte r th e tim e o f a n L E D c u rr e n t s ta n d u p . W h e n r is in g d u rin g P W M o p e ra tio n , a s fo r th e s ta n d u p tim e o f a D C /D C o u tp u t, o n ly th e ra te o f P W M D u ty b e c o m e s la te . A p p e a r a n c e m a y b e in flu e n c e d w h e n e x tr e m e ly la te fre q u e n c y a n d e x tre m e ly lo w D u ty a r e in p u tte d . P le a s e s e c u r e 8 0 μ s o r m o r e o f H s e c tio n s a t th e tim e o f P W M p u ls e F o rc e .
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Technical Note
Key Back Light ON/OFFControl
(12) Key back light 2-value decision ・Capable of comparing luminosity factor data with judgment threshold value with a hysteresis to determine binary judgment for illumination intensity. ・Available for key backlight ON/OFF control based on illumination intensity. ・Sets a threshold value and a hystresis via the registers. Bit Name : CTH(3:0) Bit Name : CHYS(1:0) The threshold value and hystresis must meet the following condition: CTH setting CHYS setting
ON
Detect threshold level, Hysteresis setup is possible OFF
Example: The backlight turns on with an illumination intensity of 7 and turns off with an illumination intensity of 5. Ambient Level CTH[3:0]=7h CHYS[1:0]=1h (13) Key back light PWM control ・Outputs ON or OFF for binary judgment via the KBLT terminal after PWM processing. ・Allows a slope time to be set in the register via PWM. 32 levels of duties prepared as MAX Duty are sequentially stepped at KBSLP time intervals. Bit name: KBSLP(1:0) ・A PWM cycle can choose 2 value. Bit name: FPWM ・It can be changed to the single control by the following setup of a register. The KBSLP(1:0), FPWM setting is effective. KBMD 0 1 KBEN 0 1 KBLT output Depend on ALC setting 0 1
・32 levels Duty ratio (H level section) becomes the following set point. Step Duty(%) Step Duty(%) 0 16 0.00 25.00 1 17 1.56 28.13 2 18 3.13 31.25 3 19 4.69 34.38 4 20 6.25 37.50 5 21 7.81 40.63 6 22 9.38 45.31 7 23 10.94 50.00 8 24 12.50 56.25 9 25 14.06 62.50 10 26 15.63 68.75
100 90 80 70 Dut y r at i o ( %) 60 50 40 30 20 10 0 0 5 10 15 20 25 30 The number of s t ep' s
11 12 13 14 15
17.19 18.75 20.31 21.88 23.44
27 28 29 30 31
75.00 81.25 87.50 93.75 100.00
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BD6088GUL
Technical Note
KBEN
KBLT DUTY
Expansion
t= time per 1step×32
ｔ
KBEN D uty=1.56%(At the time of step 1)
Duty=93.75%(At the time of step 30) FPWM Expansion
KBLT
Step OUTSLP(1:0) OFF 0 1
･･････
301
31
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BD6088GUL
●OUT PWM Control ・PWM A fixed signal is output from OUT1 ~ 4 terminal. ・Allows a slope time to be set in the register via PWM. 32 levels of duties prepared as MAX Duty are sequentially stepped at OUTSLP time intervals. Bit name: OUTSLP(1:0) ・A PWM cycle can choose 2 value. Bit name: FPWM ・Forced OFF is made with an OUTCNT terminal. Bit name: OUT*MD
Technical Note
OUT*MD 0
OUT*EN 0 1 0
OUTCNT 0 1 0 1
OUT*出力 After the PWM slope, Hi-z (Duty 0%) After the PWM slope, L (Duty 100%) Hi-z (LED is compulsory lights off) Hi-z(Duty0%) *1 Hi-z (LED is compulsory lights off L (Duty100%) *
1 1
*1 But, Duty in the middle of the PWM slope is output at the time as the PWM slope by OUT*EN.
OUT* OUT*EN PWM Slope circuit OUTCNT OUT*MD
0 1
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BD6088GUL
①Setup of a slope (Except for OUTSLP [1:0] =00h)
1 OUT*MD 0 1 OUT*EN 0 1 OUTCNT 0 Duty(100%) OUT*DUTY Duty(0%) Lights off (Hi-z) OUT* terminal Lights on(L)
PWM operate
OUT*DUTY show the H section of the output step NMOS gate. (Duty 0%~100 %)
Technical Note
Slope by OUTCNT is nothing. (It is done ON/OFF promptly.)
②Slope setup nothing (OUTSLP[1:0]=00h)
1 OUT*MD 0 1 OUT*EN 0 1 OUTCNT 0 Duty(100%) OUT*DUTY Duty(0%) Light off (Hi-z) OUT* terminal Light on(L)
OUT*DUTY shows the H section of the output step NMOS gate. (Duty 0%~100%)
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BD6088GUL
Technical Note
・32 levels Duty ratio (H level section) becomes the following set point.
Step 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Duty(%) 0.00 1.56 3.13 4.69 6.25 7.81 9.38 10.94 12.50 14.06 15.63 17.19 18.75 20.31 21.88 23.44
Step 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Duty(%) 25.00 28.13 31.25 34.38 37.50 40.63 45.31 50.00 56.25 62.50 68.75 75.00 81.25 87.50 93.75 100.00
100 90 80 70 Dut y r at i o ( %) 60 50 40 30 20 10 0 0 5 10 15 20 25 30 The number of s t ep' s
O UT*E N
O UT*D UTY
E xpansion
t= tim e per 1step×32
ｔ
O UT*E N D uty=1.56%(A t the time of step 1)
Duty=93.75%(At the time of step 32) FPW M E xpansion
OUT*
OUTSLP(1:0) Step OFF 0 1 ･･････ 30 31
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2011.04 - Rev.A
BD6088GUL
Technical Note
●I/O When the RESETB pin is Low, the input buffers (SDA and SCL) are disabling for the Low consumption power.
When RESETB=L, output is fixed at “H.”
SCL (SDA)
Level shifter EN Logic
RESETB
Special care should be taken because a current path may be formed via a terminal protection diode, depending on an I/O power-on sequence or an input level.
●About the pin management of the function that isn't used and test pins Setting it as follows is recommended with the test pin and the pin which isn't used. Set up pin referring to the “Equivalent circuit diagram” so that there may not be a problem under the actual use. T1 Short to GND because pin for test GND
T2, T4 T3 Non-used LED Pin WPWMIN, OUTCNT OUT1～4 KBLT
Short to GND because pin for test input OPEN because pin for test output Short to GND (Must) But, the setup of a register concerned with LED that isn’t used is prohibited. Short to ground (A Pull-Down resistance built-in terminal is contained, too.) It opens for an output Although Pull-Down is built in, it opens for an output.
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BD6088GUL
●Operation Settings (Flow Example) 1. Backlight: Auto luminous Mode
Apply supply voltage.
Technical Note
Cancel reset.
Luminous control: Various settings Backlight: Various settings
The backlight settings can be made at any timing so long as it precedes MLEDEN=1. MLEDMD=1 is mandatory.
ALCEN=1
ALC block operation takes place for Illumination Intensity measurement.
Wait for 80.4 ms or more Time required for initial Illumination Intensity acquisition.
MLEDEN=1
The backlight turns on. MLEDEN=0 must be set first when the backlight is off.
A LC EN A D C Y C (1:0)
A D C C ycle
S B IA S
O utput
T wait= 64m s(typ)
A D C M ovem ent
W hen SB IA SO N =1
T AD = 16.4m s(typ)
G C 1, G C 2
G C 1, G C 2=00
A M B (3:0)
A M B (3:0)
T A M B= 80.4m s(typ)
V O UT
L ED current
① T SO FT
When It cannot wait for the first illumination measurement, backlight lighting is possible with ALCEN. But the extremely short case of slope rise time, a shoulder may be done like ① for an LED electric current. (To the first illumination measurement for AMB(3:0)=00h) 2. Backlight: Fade-in/Fade-out
Apply supply voltage.
Cancel reset.
Backlight: Various settings
Backlight setting. Slow time setting.
MLEDEN=1
The backlight turns on. (Rise at designated slope time)
Set the minimum current.
(Rise at designated slope time)
MLEDEN=0
The backlight turns off.
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BD6088GUL
3. Backlight: Un-auto luminous Mode
Apply supply voltage.
Technical Note
Cancel reset.
Backlight: Various settings
The backlight settings can be made at any timing so long as it precedes MLEDEN=1. MLEDMD=0 is mandatory.
MLEDEN=1
The backlight turns on. MLEDEN=0 must be set first when the backlight is off.
M LE D EN
V O UT
L ED current
T SO FT
T he rise time depends on TLH(3:0) setting
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BD6088GUL
●PCB pattern of the Power dissipation measuring board
Technical Note
st 1 layer(component)
2nd layer
3rd layer
4th layer
5th layer
6th layer
th 7 layer
8th layer(solder)
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BD6088GUL
Technical Note
●Notes for use (1) Absolute Maximum Ratings An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down devices, thus making impossible to identify breaking mode such as a short circuit or an open circuit. If any special mode exceeding the absolute maximum ratings is assumed, consideration should be given to take physical safety measures including the use of fuses, etc.
(2) Power supply and ground line Design PCB pattern to provide low impedance for the wiring between the power supply and the ground lines. Pay attention to the interference by common impedance of layout pattern when there are plural power supplies and ground lines. Especially, when there are ground pattern for small signal and ground pattern for large current included the external circuits, please separate each ground pattern. Furthermore, for all power supply pins to ICs, mount a capacitor between the power supply and the ground pin. At the same time, in order to use a capacitor, thoroughly check to be sure the characteristics of the capacitor to be used present no problem including the occurrence of capacity dropout at a low temperature, thus determining the constant. (3) Ground voltage Make setting of the potential of the ground pin so that it will be maintained at the minimum in any operating state. Furthermore, check to be sure no pins are at a potential lower than the ground voltage including an actual electric transient. (4) Short circuit between pins and erroneous mounting In order to mount ICs on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can break down the ICs. Furthermore, if a short circuit occurs due to foreign matters entering between pins or between the pin and the power supply or the ground pin, the ICs can break down. (5) Operation in strong electromagnetic field Be noted that using ICs in the strong electromagnetic field can malfunction them. (6) Input pins In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the parasitic element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of the input pin. Therefore, pay thorough attention not to handle the input pins, such as to apply to the input pins a voltage lower than the ground respectively, so that any parasitic element will operate. Furthermore, do not apply a voltage to the input pins when no power supply voltage is applied to the IC. In addition, even if the power supply voltage is applied, apply to the input pins a voltage lower than the power supply voltage or within the guaranteed value of electrical characteristics. (7) External capacitor In order to use a ceramic capacitor as the external capacitor, determine the constant with consideration given to a degradation in the nominal capacitance due to DC bias and changes in the capacitance due to temperature, etc. (8) Thermal shutdown circuit (TSD) This LSI builds in a thermal shutdown (TSD) circuit. When junction temperatures become detection temperature or higher, the thermal shutdown circuit operates and turns a switch OFF. The thermal shutdown circuit, which is aimed at isolating the LSI from thermal runaway as much as possible, is not aimed at the protection or guarantee of the LSI. Therefore, do not continuously use the LSI with this circuit operating or use the LSI assuming its operation. (9) Thermal design Perform thermal design in which there are adequate margins by taking into account the permissible dissipation (Pd) in actual states of use. (10) LDO Use each output of LDO by the independence. Don’t use under the condition that each output is short-circuited because it has the possibility that an operation becomes unstable. (11) About the pin for the test, the un-use pin Prevent a problem from being in the pin for the test and the un-use pin under the state of actual use. Please refer to a function manual and an application notebook. And, as for the pin that doesn't specially have an explanation, ask our company person in charge. (12) About the rush current For ICs with more than one power supply, it is possible that rush current may flow instantaneously due to the internal powering sequence and delays. Therefore, give special consideration to power coupling capacitance, power wiring, width of ground wiring, and routing of wiring. (13) About the function description or application note or more. The function description and the application notebook are the design materials to design a set. So, the contents of the materials aren't always guaranteed. Please design application by having fully examination and evaluation include the external elements.
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2011.04 - Rev.A
BD6088GUL
●Power dissipation (On the ROHM’s standard board)
Technical Note
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0 25 50 75 Ta（℃） 100 125 150 1380mW
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Power Dissipation Pd （W)
Information of the ROHM’s standard board Material : glass-epoxy Size : 50mm×58mm×1.75mm(8th layer) Wiring pattern figure Refer to after page.
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BD6088GUL
●Ordering part number
Technical Note
B
D
6
Part No. 6088
0
8
8
G
U
L
-
E
2
Part No.
Package GUL : VCSP50L3
Packaging and forming specification E2: Embossed tape and reel
VCSP50L3(BD6088GUL)
3.50± 0.05
1PIN MARK
Tape Quantity
0.1± 0.05 0.55MAX
Embossed carrier tape 2500pcs E2
The direction is the 1pin of product is at the upper left when you hold
3.50± 0.05
S
Direction of feed
( reel on the left hand and you pull out the tape on the right hand
)
0.06 S 36- φ 0.25± 0.05 0.05 A B
F E D C B A 123456
A B
(φ0.15)INDEX POST
P=0.50× 5
0.50± 0.05
0.50± 0.05
P=0.50× 5
1pin
Direction of feed
(Unit : mm)
Reel
∗ Order quantity needs to be multiple of the minimum quantity.
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Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. The Products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices). The Products specified in this document are not designed to be radiation tolerant. While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or malfunction for a variety of reasons. Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law.
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