LDS9003 / 9001
High Power LED Temperature and PWM Controller
with LED-Sense TM In-Situ LED TJ Sensing
FEATURES
High temperature LED current de-rating and
TM
thermal control using the LED-Sense
algorithm that directly monitors LED Tjunction
No external thermal sensor is required
Up to three temperature sensing and control
channels on LDS9003 supports multi-point
thermal monitoring or multi-color LED
applications; LDS9001 is a single channel
Programmable Temp vs. PWM Duty Cycle
profiles (3 for LDS9003; 1 for LDS9001)
Integrated PWM for dimming control of high
brightness (HB) LED Drivers in logarithmic
duty cycle steps from 0% to 100% (~ 0.17 dB /
step)
PWM Dimming Control range of 256:1
2
I C compatible serial programming interface
Interfaces to available high side HB LED
drivers and low cost microcontrollers
LDS9003 is available in a small footprint
2
3 mm x 3 mm 16-pin TQFN
2
LDS9001 is in a 3 x 2 mm 8-pin DFN
The LDS9003/9001 utilizes the LED-Sense™
sensing and control algorithm that directly measures
the LED junction and controls the temperature by
closed loop adjustment of the LED Driver current via
PWM duty cycle corrections.
The control loop real-time adjusts the LED current via
PWM correction codes in user programmed Look up
Tables (LUTs) assigned to each sensing channel.
The user programs desired correction profiles for
every 5ºC increment from -35ºC to 120ºC. A single
sensing channel and correction LUT is available in
the LDS900, whereas three correction profiles are
available in LDS9003 to support multi-point
temperature sensing or multi-color LED applications.
APPLICATIONS
HB LED General Illumination Lighting
Automotive LED Lighting
Architectural LED Lighting
DESCRIPTION
Integrated PWM generators support dimming and
LED temperature vs. current compensation. The
2
PWM duty cycle is programmable via the I C serial
interface from 0% to 100%. User-programmed 8-bit
codes are converted to 12-bit logarithmic steps of ~
0.17 dB per step. The PWM frequency is ~280 Hz to
minimize noise generation.
The LDS9003 is a 3-channel and LDS9001 is a 1channel LED junction temperature monitor and
control device intended for use in high power LED
solid state lighting applications. It connects directly to
a LED anode and the PWM input of available high
power HB drivers to real-time adjust LED current to
2
meet maximum LED temperature. A two wire I C
interface allows communication to a local low cost
microcontroller or other remote host processor
device.
The EN logic input functions as a chip enable. A logic
HIGH applied at the EN pin allows the LDS9003 /
2
LDS9001 to respond to I C communications. An
optional external serial interface address pin is
available for use in multi-target applications.
LDS9003 / 9001 can improve thermal management
of high power LED systems by controlling reliable
LED junction temperature levels to meet maximum
operating lifetimes. In addition, it can reduce cost by
allowing operation at optimal LED current/luminance
levels minimizing the number HB LED lamps per
fixture required to meet illumination targets.
© 2009 IXYS Corp.
Characteristics subject to change without notice
The device operates from 2.5 to 5.5V.
2
The LDS9001 is available in an 8-lead 3 x 2 mm
DFN package. The LDS9003 is in a 16-lead 3 x 3
2
mm TQFN package.
1
Doc. No. 9003/9001DS, Rev. N1.0
LDS9003 / 9001
TYPICAL APPLICATION CIRCUITS
Using LDS9003 for 3 x 3 series WLEDs
Using LDS9003 for HB RGB for Projector
Using LDS9001 for series WLEDs
© 2009 IXYS Corp.
Characteristics subject to change without notice
2
Doc. No. 9003/9001DS, Rev. N1.0
LDS9003 / 9001
ABSOLUTE MAXIMUM RATINGS
Parameter
VIN, IPWMX, TSENSEx
EN, SDAT, SCLK, SADD voltage
Storage Temperature Range
Junction Temperature Range
Soldering Temperature
HBM
ESD Protection Level
MM
Rating
6
V IN + 0.7V
-65 to +160
-40 to +125
300
2
200
Unit
V
V
°C
°C
°C
kV
V
RECOMMENDED OPERATING CONDITIONS
Parameter
VIN
IPWMx
Junction Temperature Range
Rating
2.5 to 5.5
1
-40 to +125
Unit
V
mA
°C
Typical application circuit with external components is shown on page 1.
ELECTRICAL OPERATING CHARACTERISTICS
(Over recommended operating conditions unless specified otherwise) Vin = 3.6V, Cin = 0.1 µF, EN = High, TAMB = 25°C
Name
IPWMx Channel DC Current Level
Quiescent Current
EN = VIN
Shutdown Current
PWM Frequency
# of PWM duty cycle steps
Conditions
2
Standby (no I C clock)
VEN = 0V
240
Log Mode steps
Minimum PWM On Time
PWM resolution
PWM Step Size
of
PWM Steps for current adjust
Temperature Compensation Adjust Steps
Input current
EN Pin
High
Logic Level
Low
Thermal Shutdown
Thermal Hysteresis
Wake-up/Shutdown Delay Time from EN
Raising/Falling Edge
© 2009 IXYS Corp.
Characteristics subject to change without notice
Min
0.8
60
10
Log Mode
Log Mode
1-x Scale Mode
2-x Scale Mode
Typ
1
100
0.5
285
256
13.7
12
0.17
-7
-14
Max
1.2
140
1
320
Units
mA
µA
µA
Hz
20
µs
bits
dB/step
PWM
0
Steps/5 C
0
C
µA
0
0
5
Active mode, EN = VIN
Active Mode or Normal
Standby Mode
Soft ramp disabled
Soft ramp enabled
3
-1
1.2
1
0.4
150
20
10
250
V
°C
ms
ms
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
I 2C CHARACTERISTICS
Over recommended operating conditions unless otherwise specified for 2.5 VIN 5.5V, over full ambient temperature range -40 to +85ºC.
Symbol
fSCL
tHD:STA
tLOW
tHIGH
tSU:STA
tHD:DAT
tSU:DAT
tR
tF
tSU:STO
tBUF
tAA
tDH
Parameter
SCL Clock Frequency
Hold Time (repeated) START condition
LOW period of the SCL clock
HIGH period of the SCL clock
Set-up Time for a repeated START condition
Data In Hold Time
Data In Set-up Time
Rise Time of both SDAT and SCLK signals
Fall Time of both SDAT and SCLK signals
Set-up Time for STOP condition
Bus Free Time between a STOP and START condition
SCLK Low to SDAT Data Out and ACK Out
Data Out Hold Time
Min
0
0.6
1.3
0.6
0.6
0
100
Max
400
Unit
kHz
µs
µs
µs
µs
ns
ns
ns
ns
µs
µs
µs
ns
0.9
300
300
0.6
1.3
0.9
300
2
Figure 1: I C Bus Timing Diagram
READ OPERATION:
Option 1: Standard protocol sequential read:
S
Slave Address
R
A
Data 0
A
Data 1
A
From: Reg. m
Reg. m+1
where Reg. m is the last addressed in the write operation register
Data 2
Data n
A*
Reg. m+2
Reg. m+n,
P
Option 2: Random access:
S
Slave Address
R
A
Data m
A*
P
From reg. m, where Reg. m is the last addressed in the write operation register
Option 3: Random access with combined (extended) protocol:
S
Slave Address
W
A
Register Address m
A
Sr
Slave Address
R
A
Data m
A*
P
WRITE OPERATION:
Option 1: Standard protocol sequencial write:
S
Slave Address
W
A
Register Address m
A
Data 0
To: Reg. m
© 2009 IXYS Corp.
Characteristics subject to change without notice
4
A
Data 1
Reg. m+1
A
Data 2
Reg. m+2
Data k
A*
P
Reg. m+k
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
Option 2: Combined (extended) protocol:
S
Slave Address
W
A
Register Address m
A
Sr
Slave Address
W
A
Data
A*
P
To: Reg. m
S: Start Condition
Sr Start Repeat Condition
R, W: Read bit (1), Write bit (0)
A: Acknowledge (SDAT high)
A*: Not Acknowledge (SDAT low)
P: Stop Condition
Slave Address: Device address 7 bits (MSB first).
Register Address: Device register address 8 bits
Data: Data to read or write 8 bits
- send by master
- send by slave
I2 C BUS PROTOCOL
Standard protocol
Combined protocol:
WRITE INSTRUCTION SEQUENCE
Standard protocol:
© 2009 IXYS Corp.
Characteristics subject to change without notice
5
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
Write Instruction Example - Setting 20mA Current in LEDB1 and LEDB2
LDS9003 / 9001 REGISTERS DEFINITION AND PROGRAMMING
Note: Unlisted register addresses are for factory use only; For proper operation write only to registers defined.
ADDRESS
DESCRIPTION
IPWM1 Current setting
IPWM (9001)
IPWM2 Current setting
(Not used for 9001)
IPWM3 Current setting
(Not used for 9001)
IPWMx and TSENSEx
Channel Enable
BITS
04h
Global PWM Dimming
8
05h
IPWM1 User Duty Cycle
IPWM (9001)
8
00h
01h
02h
03h
06h
07h
19h
IPWM2 User Duty Cycle
IPWM (9001)
IPWM3 User Duty Cycle
IPWM (9001)
LED Diagnostics Test
1Eh
1Fh
LED Faults Status
( shorted to GND)
LED Faults Status
(shorted to VIN/open)
Configuration register
Software reset, Standby
49h
Ta-Tj Temperature Offset
1Ch
1Dh
© 2009 IXYS Corp.
Characteristics subject to change without notice
NOTES
8
8
User Loads code 08h ( 8 decimal) for 1 mA peak current
For PWM control current output.
This is only valid user code.
8
6
User loads 2Ah for 9003.
User loads 02h for 9001.
Log mode: (default)
Simultaneously decreases PWM duty cycle for IPWMx
Data Code 00h = 0 dB dimming, FEh = – 72 dB FFh = OFF
Example: 50% brightness reduction ( – 6dB) requires:
– 6dB / – 0.17dB = 35 (decimal) = 23h steps
Linear Mode:
Simultaneously decreases ILED in banks A – C by subtracting
Global Dimming Code (Reg04h data) from PWM Duty Cycle
Code (Reg05h – Reg07h data)
Data Code 00h = 0 dimming, If Global Dimming Code is
equal or exceeds PWM Duty Cycle Code, ILED = 0 mA.
Log Mode:
~ – 0.17dB dimming per LSB for currents > 300 µA; Refer to
8 to 12 bit conversion curve (Figure 3 and Table 10) for
resolution in range 0 – 300 µA
Data Code 00h = 0% Duty Cycle, FFh = 100% Duty Cycle
Example: 50% brightness reduction ( – 6dB) requires: 255 –
(– 6 dB / – 0.17 dB) = 255 – 35 = 220 (decimal) = DCh steps
8
Same as above for reg 05h
8
Same as above for reg 05h
8
5
5
8
8
8
See Table 2; Bit 5 = 1 sets user-initiated LED short/open
diagnostic
Bits from bit 5 to bit 0 represent LED status for sensed LEDs
Bit =1 LED short to GND
Bits from bit 5 to bit 0 represent LED status for sensed LEDs
respectively. Bit = 1 represents LED shorted to VIN/open
See Table 3
See Table 4
Since LED junction temperature is measured, the values
loaded here allow an offset to account for Tj – Ta gradient.
This allows correction tables to be referenced to ~ Ta levels.
Two 4 bit offsets value for the LED and the Si Diode;
Bit [7:4] = Tj-Ta offset for the LEDs
6
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
ADDRESS
DESCRIPTION
BITS
4Ah
LED Shutdown
Temperature
5
4Bh
2-x Table enable and
breakpoint (T-code)
6
50h – 5Fh
60h – 6Fh
70h – 7Fh
A0h
Temp vs IPWM1 DC LUT
-35C to 120C
(one 5C step every
nibble)
(IPWM LUT for 9001)
ΔPWM code1[7:4],
ΔPWM code0[3:0] –
ΔPWM code 31[7:4],
ΔPWM code 30[3:0]
Temp vs IPWM2 DC LUT
-35C to 120C
(one 5C step every
nibble)
ΔPWM code1[7:4],
ΔPWM code0[3:0] –
ΔPWM code 31[7:4],
ΔPWM code 30[3:0]
Temp vs IPWM3 DC LUT
-35C to 120C
(one 5C step every
nibble)
ΔPWM code1[7:4],
ΔPWM code0[3:0] –
ΔPWM code 31[7:4],
ΔPWM code 30[3:0]
Silicon diode dV F/dT [7:0]
2
8
A4h
(connected to TSENSE1;
TSENSE for 9001)
LED2 dVF/dT [7:0]
(connected to TSENSE2)
© 2009 IXYS Corp.
Characteristics subject to change without notice
Two LUT words per I C address.
Each word contains two 4-bit numbers representing of ΔPWM
codes. See
Table 6 and Appendix 1 for LUT programming.
Same as above for regs 50h-5Fh
8
Not used for 9001
Same as above for regs 50h -5Fh
8
8
LED1 dV F/dT [7:0]
A2h
NOTES
Bit [3:0] = Tj-Ta offset for the Si diode.
Typically should set both offsets to be equal.
See Table 5 & 6
Defines T-code, at which IPWMs channels are shut down
(i.e. 0% duty cycle) per LED vendor reliability and de-rating
specification (see Table 5); Factory default value = 11100
0
(bin) = 1Ch represents 105 C Tj
Bit 5 = 1 enables 2-x s cale LUT ΔPWM code correc tion (derating) starting at the breakpoint set by T-code (bits 4:0)
Bit 5 = 0 ; 1x scale (default) for entire temperature range
Bit [4:0] defines T-code, where temperature de-rating starts,
or where 2x scaling begins (see Table 6)
8
8
Not used for 9001
Silicon diode VF temperature coefficient (K factor) :
Factory recommended loaded value is 36h = -1.71 mV/°C
= 001 10110 (bin),
where bits from bit 7 to bit 5 represent integer part
[1(decimal) = 001 (bin)], and bits from bit 4 to bit 0 – fractional
part [0.710 / 0.03125 = 22 (decimal) = 10110 (bin)]
User-loaded VF temperature coefficient @ 1mA for LEDs
used at TSENSE1 (TSENSE for 9001)
Negative tracking is assumed with temperature;
Bits from bit 7 to bit 5 represent integer part and
bits from bit 4 to bit 0 - fractional part of the coefficient
0
Example: Temperature coefficient = -2.26 mV/ C;
Bit 7 – bit 6 = 2 (decimal) = 010 (bin), and
Bit 4 – bit 0 = INT{0.26 / 0.03125} = 8 (decimal) = 01000 (bin)
User loads 010 01000 (bin) = 48h = -2.25 (closest setting)
Same as above reg A2h
Not used for 9001
\
7
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
ADDRESS
DESCRIPTION
LED3 dV F/dT [7:0]
(connected to TSENSE3)
A6h
BITS
NOTES
Same as above for reg A2h
Not used for 9001
Silicon diode η(eta, or non-ideality factor):
Factory recommended loaded value is default is 1.00 =
01000000(bin) = 40h
Bits from bit 7 to bit 5 represent integer part and
bits from bit 4 to bit 0 - fractional part (resolution = 0.015625
per LSB)
Ex ample: η= 1.00;
Bit 7 – bit 6 = 1 (decimal) = 01 (bin), and
Bit 5 – bit 0 = INT{0.00 / 0.015625} = 0 (dec) = 000000 (bin)
User loads 01 000000 = 40h = 1.00
Silicon diode series resistance offset
Factory recommended loaded value = 04h = ~ 68 ohms
-6
Formula (decimal) = 8192 x [(68 ohms x 8 x 10 A)/1.14 V]
LED Rs offset (user-loaded) for LED sensing channels 1, 2,
and 3 for specific LEDs used
8
Silicon diode η[7:0]
8
D4h
Silicon diode Rs offset
[7:0]
8
D6h
LED1 Rs offset [7:0]
8
C0h
LED2 Rs offset [7:0]
(not used for 9001)
LED2 Rs offset [7:0]
(not used for 9001)
D8h
DAh
User loads per LED used. (1/slope of high current region of
LED I-V characteristic).
-4
Formula (decimal) = 8192 x [(Rs Ωx 8 x 10 A) / 1.14V]
8
Same as above for reg D6h. Not use for 9001
8
Same as above for reg D6h. Not used for 9001
Table 1
Register
Address
03h
(9003)
(9001)
Bit 7
LED
OT
Flag
Same
Channel Enable Register
Bit 4
Bit 3
Bit 2
Bit 6
Bit 5
N/A
1
0
1
N/A
0
0
0
Bit 1
Bit 0
0
1
0
0
1
0
Note: User must load shown values upon “boot” or after reset; all POR bit values are 0
Table 2
Register
Address
Bit 7
Bit 6
Bit 5
Digital Test Modes Register
Bit 4
Bit 3
Bit 2
19h
Factory
Only
Factory
Only
Diagnostics
Request
Slow Ramp
Bypass = 1
Fast PWM
adjust =1
Factory
Only
0*
0*
0*
0*
Normal = 0*
0*
Bit 1
Post ADC
Filter Enable
=1
Filter Off=0*
Bit 0
Factory
Only
0*
Note: *) Value by default
Table 3
Register
Address
1Eh (9003)
1Eh (9001)
Bit 7
1
0
Bit 6
0
0
Bit 5
0
0
Configuration Register
Bit 4
Bit 3
0
1
0
0
Bit 2
0
0
Bit 1
0
0
Bit 0
0
0
Note: User must load shown values upon “boot” or after reset; all POR bit values are 0
© 2009 IXYS Corp.
Characteristics subject to change without notice
8
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
Table 4
Register
Address
Bit 7
Software
reset = 1
1Fh
Note:
Normal
operation
= 0*
Bit 6
Standby
mode =
1
Bit 5
Temperature
request = 1
Normal
operatio
n = 0*
Normal
operation
= 0*
Control Register
Bit 4
Bit 3
Custom
Calibration
OSC
request = 1
trim = 1
Factory
Normal
preset
operation
value =
= 0*
0*
Bit 2
Bit 1
Bit 0
Osc trim
2
**
Osc trim
1
**
Osc trim
0
**
*) Value by default
**) Trim code defined by customer
Bit 7 = 1 — Software reset: resets device, all registers reset/cleared.
Bit 6 = 1 — Standby (oscillator disabled, all registers retain programmed values.)
Table 5: Ta-Tj Temperature Gradient Offset
( set offset code to match reference De-rate point in LUT from LED Tj to Ta. Typically LED and Si are equal)
Register
Address
49h
Note:
Bit 7
LED
Offset 3
0*
Bit 6
LED
Offset 2
0*
Bit 5
LED
Offset 1
0*
Control Register
Bit 4
Bit 3
LED
Si Diode
Offset 0
Offset 3
0*
0*
Bit 2
Si Diode
Offset 2
0*
Bit 1
Si Diode
Offset 1
0*
Bit 0
Si Diode
Offset 0
0*
*) Value by default
Table 6: Offset Codes for Tj-Ta Temperature Gradient Offset (both LED and Si per Table 5).
Temperature
0
Offset C
(Ta-Tj)
-40
-35
-30
-25
Bit3– Bit
0
1000
1001
1010
1011
Temperature
0
Offset C
(Ta-Tj)
-20
-15
-10
-5
Bit3– Bit
0
1100
1101
1110
1111
Temperature
0
Offset C
(Ta-Tj)
0
5
10
15
Temperature
0
Offset C
(Ta-Tj)
20
25
30
35
Bit3–
Bit 0
0000
0001
0010
0011
Bit3–
Bit 0
0100
0101
0110
0111
Table 7: T-code values vs. Temperature (for registers 4Ah and 4Bh)
Temperature,
0
C
-35
-30
-25
-20
-15
-10
-5
0
Bit4 – Bit 0
00000
00001
00010
00011
00101
00101
00110
00111
Temperature,
0
C
5
10
15
20
25
30
35
40
© 2009 IXYS Corp.
Characteristics subject to change without notice
Bit4 – Bit 0
01000
01001
01010
01011
01100
01101
01110
01111
9
Temperature,
0
C
45
50
55
60
65
70
75
80
Bit4 – Bit 0
10000
10001
10010
10011
10100
10101
10110
10111
Temperature,
0
C
85
90
95
100
105
110
115
120
Bit4 – Bit
0
11000
11001
11010
11011
11100
11101
11110
11111
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
Table 8: ΔPWM CorrectionCode Allocation
Register
Address
50h, 60h, 70h
51h, 61h, 71h
52h, 62h, 72h
53h, 63h, 73h
54h, 64h, 74h
55h, 65h, 75h
56h, 66h, 76h
57h, 67h, 77h
Data bits
7– 4
3–0
ΔPWM code for
0
temperature, C
-30
-35
-20
-25
-10
-15
0
-5
10
5
20
15
30
25
40
35
Data bits
7 –4
3– 0
ΔPWM code for
0
temperature, C
50
45
60
55
70
65
80
75
90
85
100
95
110
105
120
115
Register
Address
58h, 68h, 78h
59h, 69h, 79h
5Ah, 6Ah, 7Ah
5Bh, 6Bh, 7Bh
5Ch, 6Ch, 7Ch
5Dh, 6Dh, 7Dh
5Eh, 6Eh, 7Eh
5Fh, 6Fh, 7Fh
Table 9: ΔPWM Codes Codes vs. Number of Adjustment Steps
Number of
steps
Not Valid
-7
-6
-5
Binary
Code
1000
1001
1010
1011
Number of
steps
-4
-3
-2
-1
Binary
Code
1100
1101
1110
1111
Number of
steps
0
1
2
3
Binary
Code
0000
0001
0010
0011
Number of
steps
4
5
6
7
Binary
Code
0100
0101
0110
0111
PROGRAMMING EXAMPLES
Operation
Disable Temperature De-rating (DT_Adjust_disable)
Re-Enable Temperature De-rating
Short/open LED diagnostic request
Read out LED short to GND status
Read out LED short to VIN /open status
Set Standby Mode
Resume normal operation from standby mode
Calibration request (conduct temperature calibration)
0
Set LEDs in shutdown mode at junction temperature above 100 C
Set Ta-Tj offset for LED and Si Diode to -20ºC
Software Reset (to default values) and/or clear of all registers
Note:
Register
Address
1Eh
1Eh
19h
1Ch
1Dh
1Fh
1Fh
1Fh
4Ah
49h
1Fh
Register Data
04h
00h
20h
40h
00h
10h
1Bh
CCh
80h
Command
(hex)
XX 1E 04
XX 1E 00
XX 19 20
XX 1C YY
XX 1D YY
XX 1F 40
XX 1F 00
XX 1F 10
XX 4A 1B
XX 49 CC
XX 1F 80
XX – The LD9003/9001 I2C customer-selected slave address followed by binary 1 for write command, i.e. if I2C slave address is
001 0001 (see Table 8), XX = 0010 0011 (bin) = 23h
YY – The 90003/9001 I2C customer-selected slave address followed by binary 0 for read command, i.e. if I 2C slave address is
001 0001 (see Table 8), YY = 0010 0010 (bin) = 22h
© 2009 IXYS Corp.
Characteristics subject to change without notice
10
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
PIN DESCRIPTION
Pin #
1
2
3
4
5
Name
Name
LDS9001 LDS9003
SCLK
SDAT
SADD
GND
EN
SCLK
SDAT
SADD
GND
NC
Function
2
I C Serial clock input
2
I C Serial data input/output
2
I C Serial interface Address Programming
Ground Reference
Not connect (no internal connect to the device)
9001: LED Led-Sense for LED anaode
6
TSENSE
EN
9003: Device enable (active high)
9001: PWM current source output 1mA
7
IPWM
NC
9003: NC
9001: Power Source Input; connect to 2.5V-5.5Vdc
8
VIN
IPWM3
9003: PWM3 current source output 1mA
9
TSENSE3 LED-Sense input for LED3 anode
10
IPWM2 PWM3 current source output 1mA
11
TSENSE2 LED-Sense input for LED2 anode
12
IPWM1 PWM1 current source output 1mA
13
TSENSE1 LED-Sense input for LED1 anode
14
V IN
Power Source Input; connect to 2.5-5.5Vdc
15
TST
Not connected by user; leave floating Factory Test pin
16
NC
Not connect (no internal connect to the device)
PAD
PAD
Connect to GND on the PCB
Top View :
2
DFN 8-Lead 3 x 2 mm
Top View :
2
TQFN 16 -Lead 3 x 3 mm
PIN FUNCTION
V IN is the supply pin. The operating input voltage
range is from 2.5 V to 5.5 V.
TSENSE1, TSENSE2, TSENSE3 (LDS9003) and
TM
TSENSE
(LDS9001)
are
the
LED-Sense
temperature sensing pins for the LEDs. These
connect to the LED anodes. These pins force
currents of 1mA and 200ua and measure voltages for
calculation of LED junction temperature. These pins
enter high-impedance zero current state whenever
the device is in shutdown mode.
EN is the enable input for the entire device.
Guaranteed levels of logic high and logic low are set
at 1.3 V and 0.4V respectively. When EN is initially
taken high, the device becomes enabled and may
2
communicate through I C interface
2
SDAT is the I C serial data line. This is a bidirectional
line allowing data to be written into and read from
internal registers.
IPWM1, IPWM2, IMPWM3 (LDS9003) and IPWM
(LDS9001) are the PWM 1mA peak to GND current
sources outputs for controlling PWM of external HB
LED driver. User adds resistor to GND to generate
desired PWM voltage range levels. These pins enter
high-impedance zero current state whenever the
device is in shutdown mode.
2
SCLK is the I C serial clock input.
2
SADD is I C Serial interface Addresses tie to either
GND or VIN pin to allow choice of two slave
addresses. Allows two 9003 or 9001 on same control
bus for optional increased LED-SenseTM point
monitoring control
TST is a test pin used by factory only. Leave it
floating (no external connection)
PAD is the exposed pad underneath the package.
For best thermal performance, the tab should be
soldered to the PCB and connected to the ground
plane
GND is the ground reference for internal circuitry.
The pin must be connected to the ground plane on
the PCB.
© 2009 IXYS Corp.
Characteristics subject to change without notice
11
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
BLOCK DIAGRAM
Figure 2: LDS9003 / 9001 Functional Block Diagram
VIN
SCL
K
Vin to
al l
Drivers
OverTemp
I2C Interface
Top Level Control
diagnostics
Shorted LED
Open LED
LED Calibration
Soft Start control
Calibrated
Reference
Currents
and
ADC bias
currents
Bandgap
Voltage
Reference
1.2V
TSENSE1
TSENSE (9001)
PWMA
1mA
SDA
T
1.2V
ADC
10 bit SAR
10
Digital Temperature
Sensor / Abritrator
Si Iforce
SADD
1 0 uA
IPWM1
IPWM (9001)
Pre-Scale
8x, 1x, or 1/4x
LED Iforce
2 uA 1 mA
TSENSE2
(only 9003)
0.2 mA
LUT1
PWM2
1mA
LUT2
LUT3
Temp
Compensation
Tables
Temp to PWM
adjust LUTs
Gnd
PWM1
8 bit to 12 bit (log) PWM
Generator
to PWM1
PWM2
8 bit to 12 bit (log) PWM
Generator
to PWM2
PWM3
8 bit to 12 bit (log) PWM
Generator
1.8V
GND
IPWM2
(only 9003)
Si PNP
temp diode
To top control
TSENSE3
(only 9003)
PWM3
1mA
to PWM3
IPWM3
(only 9003)
to top control & dig processing
Vin
Vin to 1.8V LDO
f or digital core
1.2V
POR
Start Up
Oscillator & Clock Generator
~ 1.2 MHz
Vin
EN
BASIC OPERATION
An initialization sequence then begins, taking less
than 10 ms. This sequence determines the user2
selected I C slave address and loads factory
programmed settings
The LDS9003/9001 may operate in the following
modes:
a) Normal Operation Mode
b) Normal Standby Mode
c) Programming Modes
d) Shutdown Mode
2
At this point, the I C interface is ready for
communication and the LDS9003 / 9001 may be userprogrammed. Upon programming completion for all
required initial “boot” parameters a calibration
command is given by setting bit 4 of the Control
Register (1Fh) HIGH. This starts the calibration
TM
sequence of the LDS9003 / 9001 LED-Sense
temperature sensing and measurement circuits and
occurs simultaneous with a gradual ramp-up of the
PWMs and current levels to the user programmed
values. This initialization is completed in less than 250
ms in the default soft-start ramp mode, or s less than
NORMAL OPERATION MODE
At power-up, V IN should be in the range from 2.5 V to
5.5 V (max). If VIN is slow rising, EN pin should be
logic LOW at least until VIN reaches a 2.5 V level.
When EN is taken HIGH, a soft-start power-up
sequence begins and performs an internal circuits
reset that requires less than 100 µs.
© 2009 IXYS Corp.
Characteristics subject to change without notice
12
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
Figure 4: Typical Light Output vs LED Current for
Luxeon Rebel WLED
10 ms with the soft-start ramp mode disabled by
setting bit 1 of the Configuration Register (1Eh)
HIGH.
The calibration parameters for the temperature
measurement engine
and all customer-set
parameters remain intact until the part is reset or
powered-down. Additionally, the user can recalibrate LDS9003 / 9001 during times when LED
currents are brought to zero and the system is
thermally stabilized by programming the calibration
command bit as discussed.
Temperature vs PWM Duty Cycle Profiles
The user must load the PWM correction look up
tables (LUTs) prior to operation. For the LDS9003 all
three tables, LUT1, LUT2 and LUT3 require loading
(even if using same data) with the user correction
profiles prior to operation. The LDS9001 just
requires loading of LUT1.
Figure 5 gives the LED current de-rating specification
for a Luxeon Rebel WLED for 700mA LED current that
insures not exceeding the maximum specified LED
junction temperature of 150ºC. This specific curve is
for thermal resistance, ӨJC, from LED junction to case
designed for 12.5ºC/W.
The correction tables are based upon LED vendor
characteristics for illumination vs temperature and
current, LED current de-rating specifications, and
user system thermal design parameters. The
following figures show examples for Luxeon Rebel
WLEDs,
Figure 5: Typical LED Current De-rating vs Case
Temperature for Luxeon Rebel WLED
Figure 3: Typical Light Output vs Temperature
for Luxeon Rebel 3W WLED
LED Current vs Temperature (case)
12.5 Cº/W J-C
It is customary for LED lighting systems to be
designed with guard-bands to the operating level to
account for design variations in the actual thermal
profile and to maximize operating lifetimes. A user
may target a lower maximum junction temperature
than the absolute maximum rating specified by the
LED vendor, such as 125ºC, for example, as well as
reducing the LED operating current=
Figure 3 shows the typical characteristic of
decreasing illumination over temperature by
approximately 30% from -20ºC to 100ºC.
Figure 4 shows that illumination is approximately
linearly dependent with LED forward current.
Therefore loss of illumination over temperature can
be compensated by associated increases in LED
current.
© 2009 IXYS Corp.
Characteristics subject to change without notice
The lower Tj guard-band will shift the curve
right, extending maximum lifetime, but the
operating current guard-banding results in
LEDs lamps per fixture to meet the desired
output level.
13
to the
lower
more
lumen
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
TM
Figure 6: Example LDS9003 / 9001 Accumulated
PWM Correction Curve
LED-Sense can eliminate the amount of operating
current guard-banding as the direct measurement of
the LED Tj reduces min to max thermal uncertainty.
Figure 6 shows a typical LDS9003 / 9001 PWM LUT
correction profile that could be programmed by the
user.
Given the 5ºC increments of the temperature
adjustment intervals for the LDS9003 / 9001, the
currents are slowly ramped to equalize loss of light
output before the de-rating profile begins. Once derating begins, the PWM duty cycle is reduced,
lowering LED driver current, to insure meeting and
regulating to the desired LED Tj.
Table 10 shows a simple text format of the
correction table for the graph shown in Figure 6.
Table 11 shows the exact data loaded to the LUTs’
2
I C address locations as defined in Table 8.
.
Table 10: PWM Correction Look Up Table Example (per graph)
Temp.
-35
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
40
LUT1
0
0
-1
0
0
0
-1
0
0
0
0
-1
0
0
0
1
LUT2
0
0
-1
0
0
0
-1
0
0
0
0
-1
0
0
0
1
LUT3
0
0
-1
0
0
0
-1
0
0
0
0
-1
0
0
0
1
Scale Temp.
1
45
1
50
1
55
1
60
1
65
1
70
1
75
1
80
1
85
1
90
1
95
1
100
1
105
1
110
1
115
1
120
LUT1
1
0
0
0
1
0
-1
-2
-3
-5
-6
-6
-7
-7
-7
0
LUT2
1
0
0
0
1
0
-1
-2
-3
-5
-6
-6
-7
-7
-7
0
LUT3
1
0
0
0
1
0
-1
-2
-3
-5
-6
-6
-7
-7
-7
0
Scale
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
Note:
3 LUTs required for LDS9003 (can be same or different).
1 LUT only needed for LDS9001.
Table entries represent PWM correction steps change from the last temperature step point
Table is based on 25 0C reference point.
Steps are accumulated per this table as temperature increases or decreases.
If Scale = 1, each step is ~ 0.17 dB change in PWM duty cycle,
If Scale = 2, each step is ~ 0.34 dB change in PWM duty cycle,
The correction table stored in the correction LUT is
referenced to the LED Tj. Register 49h can be used
to apply the Ta-Tj temperature offset between the
ambient (or case) and the LED junction temperature.
This can effect a +/- shift of the correction curve in
the Temperature axis to reference the profile to
ambient or case temperature points.
© 2009 IXYS Corp.
Characteristics subject to change without notice
Register 4Ah sets the LEDs’ shutdown junction
temperature per the T-codes provided in Table 7.
When this temperature is exceeded, all of the IPWM
channels are disabled (i.e. 0% duty cycle) to insure no
damage to the LEDS. Additionally, an LED OT (over
temperature) status flag is set HIGH in Bit 7 of the
enable channel register 03h. If the flag is set the user
14
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
can re-enable the channels by re-writing to the
channel enable bits in register 03h, however the OT
flag will still remain HIGH, until the device is power
sequenced, reset, or placed in the shutdown mode.
offset. This insures the LED shutdown is also properly
referenced to the same reference temperature level
IXYS can provide customers with software support to
generate the LUT data tables. In addition, a separate
applications report can be obtained. Please consult a
sales representative or the factory to obtain.
If a Ta-Tj offset is used other than 00h (i.e. 0ºC) in
register, 49h, than the shutdown junction
temperature loaded in 4Ah should also include this
Table 11: PWM LUT Register Load Example
LUT1
Address (hex)
Data (hex)
50
00
51
0F
52
00
53
0F
54
00
55
0F
56
00
57
10
58
01
59
00
5A
01
5B
EF
5C
BD
5D
AA
5E
9B
5F
09
LUT2
Address (hex)
Data (hex)
60
00
61
0F
62
00
63
0F
64
00
65
0F
66
00
67
10
68
01
69
00
6A
01
6B
EF
6C
BD
6D
AA
6E
9B
6F
09
Recommended User Register Initialization
LUT3
Address (hex)
Data (hex)
70
00
71
0F
72
00
73
0F
74
00
75
0F
76
00
77
10
78
01
79
00
7A
01
7B
EF
7C
BD
78D
AA
7E
9B
7F
09
Figure 7: Setting up PWM Voltage Level to HB LED
Driver
2
Table 12 is provided as a recommended user I C
register initialization and calibration sequence for the
LDS9003 and LDS9001 respectively. Register load
(i.e. write) steps marked with “*” mean LDS9001
steps, as well as LDS9003. Data value entries in
RED indicate the data value is user / system
dependent. Values shown for these registers are for
example only.
IPWM Current Setting & Interface
IPWMx Current setting registers 00h – 02h should
2
be programmed to 08h using the I C interface to set
the peak DC level current for the IPWM current
source(s). This sets for 1mA ±5% DC current, and
TM
the LDS9003 LED-Sense configuration code 2Ah,
or 02h for LDS9001, should be programmed using
register 03h during initialization.
Digital dimming using the internal PWM generator
changes the duty cycle per the value set in registers
05h, 06h, and 07h and therefore adjusts the average
LED current. This is referred to as dynamic mode.
For dynamic mode, the LDS9003/9001 integrates a
digital PWM generator(s) that operates at a frequency
of ~ 285 Hz. It operates in Logarithmic Mode. The
PWM generator has 12-bit resolution and can be
programmed with an 8-bit code to provide 256
internally mapped 12-bit logarithmic duty cycle steps
to adjust the dimming level
IPWMx are current source outputs. Users must
connect an external resistor to GND from each
output to establish the peak to peak PWM voltage
level required by the HB LED driver. This is depicted
in Figure 7.
© 2009 IXYS Corp.
Characteristics subject to change without notice
15
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
Table 12: Recommended Register Load Sequence for LDS9003/9001
Reg Load
Sequence #
Reg (hex)
Value (hex)
Comments
1*
2*
3
4
5*
6*
7*
8
9
10*
11*
1Eh
00h
01h
02h
03h
04h
05h
06h
07h
49h
4Ah
88h (9003) or 00h (9001)
08h
08h
08h
A2h (9003) or 02h (9001)
00h
FBh
FBh
FBh
00h
1Eh
12*
4Bh
1Fh
13*
A0h
36h
14*
A2h
User Loads Per LED Used
15
A4h
User Loads Per LED Used
16
17*
18*
A6h
C0h
D4h
User Loads Per LED Used
40h
04h
19*
D6h
User Loads Per LED Used
20
21
22-47*
48-64
65-80
81*
D8h
DAh
50h – 5Fh
60h – 7Fh
70h – 7Fh
1Fh
User Loads Per LED Used
User Loads Per LED Used
User Loads Per LED Used
User Loads Per LED Used
User Loads Per LED Used
10h
Initialize Configuration Register
IPWM1 current @ 1mA
IPWM2 current @ 1mA
IPWM3 current @ 1mA
Set up Led-sense configuration for 9003 & 9001
Global PWM Dimming 00h is full ON = 100% DC
Duty Cycle code for IPWM1. Use set FBh=95% DC
Same as reg 05h
Same as reg 05h
Ta-Tj 0ffset
Set LED Shutdown temperature 1Eh = 120C
Set optional 2x PWM adjust step start point; 1x
scale below this point
Load Si Diode K factor for - 1.71mV/C
User loads LED K factor @ 1mA IF.
4Bh = -2.3mV/C for Luxeon Rebel WLED
User loads LED K factor @ 1mA IF. for LED1
4Bh = -2.3mV/C for Luxeon Rebel WLED
User loads LED K factor @ 1mA IF for LED2
Load Si Diode
fac tor = 1.0
Load Si Diode Rs = 68 ohms
User loads LED Rs for LED1
0Ah = 1.4 ohms for Luxeon Rebel WLED
User loads LED Rs for LED2
User loads LED Rs for LED3
LUT1 correction Table
LUT2 correction Table
LUT3 correction Table
User issues temp calibration command
The advantage of PWM dimming is stable LED color
temperature / wavelength that is determined by the
maximum static mode LED current value set by the
external HB LED driver. The integrated PWM
generator reduces the system requirement to provide
a continuous pulsed waveform, and is automatically
TM
adjusted by the LED-Sense algorithm to maintain
the programmed Temperature vs PWM DC thermal
control profile.
(i.e. FFh), and 0% duty cycle (~ -80 dB dimming) at
00h.
Figure 8 shows the dimming transfer function for
dimming level in dB (from maximum level) vs
programmed data code (decimal).
Figure 9 shows the dimming transfer function for
dimming level in percent (%) vs programmed data
code (decimal). 0% dimming is full ON brightness
(i.e. PWM duty cycle = 100%).
To use the dynamic PWM mode for LED current
setting, the maximum ILED value should first be set by
the HB LED Driver current setting resistor (per
vendor specifications) and the desired dimming / user
duty cycle can be set by registers 05h, 06h, and 07h.
Register 04h is available as a global dimming control
register. It will simultaneously control all IPWM
generators so is especially helpful in applications
using the LDS9003. It is recommended that the user
use registers 05h, 06h, and 07h to establish the
desired duty cycle at ambient room temperature (i.e
25ºC) conditions that account for further LEDTM
Sense
adjustment over temperature per the
The logarithmic operating mode provides a dimming
resolution of approximately -0.17 dB per step with
th
0dB dimming (i.e. 100% duty cycle) at the 256 step
© 2009 IXYS Corp.
Characteristics subject to change without notice
16
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
programmed Temperature vs PWM thermal control
profile. For example if the thermal control profile
requires increasing the PWM duty cycle by 5% prior
to de-rating to account for light output loss with
temperature, than the User PWM registers 05h, 06h,
and 07h should be programmed with maximum of
code FBh for 95% duty cycle at room temperature.
Dimming Code, and the Temperature Compensation
Code. If this sum is equal or below zero, LED in
particular channel is limited to 0% duty cycle (i.e. the
channel is OFF). It means that Global Dimming
dynamic range is limited by Dynamic Dimming and
Temperature Correction Table used.
As an example:
Figure 8: Dynamic Mode Dimming in Logarithmic
Mode in dB vs. register 05h, 06h and 07h data
(0dB dimming = full LED brightness)
If Dynamic Dimming in the particular channel is set
by -20 dB (registers 05h – 07h data code 143 (dec))
and Temperature Correction requires 8 steps
dimming (data code 8 (dec)), the maximum allowable
Global Dimming range = 143 – 8 = 135 (dec) steps or
~21.4 dB.
Figure 10 shows the dimming transfer function for
dimming level in dB (from maximum level) vs
programmed data code (decimal).
Figure 11 shows the dimming transfer function for
dimming level in percent (%) vs programmed data
code (decimal). 0% dimming is full ON brightness
(i.e. PWM duty cyle = 100%).
LED-Sense
TM
High Temperature Current De-rating
The LDS9003/9001 integrates the IXYS LEDTM
Sense
temperature measurement and PWM
current/duty cycle control algorithm to insure LED
reliability and operating life-times.
Figure 9: Dynamic Mode Dimming in Logarithmic
Mode in percent vs. register 05h, 06h and 07h (0%
dimming = full LED brightness)
LED current is controlled and de-rated via automatic
adjustments in the PWM duty cycle to meet LED
vendor power dissipation vs LED junction
temperature specifications and system thermal
constraints
Figure 10: Global Dimming in Logarithmic Mode
in dB vs. register 04h data
(0dB dimming = full LED brightness)
Global PWM Dimming Control
Further dimming by the user to control real-time
brightness, if desired, should then be done using the
Global Dimming option by writing register 04h. Code
00h in this register represents no further dimming
from the current level set by the user in the IPWM
duty cycle registers 05h, 06h, and 07h.
User programmable de-rating adjustments are stored
in a correction LUT(s) comprised of sixteen 8-bit
registers each for up to three sensing and control
channels (LDS9001 is only one channel). Registers
The final dimming code value is the algebraic sum of
three codes: the user Dynamic Dimming code, Global
© 2009 IXYS Corp.
Characteristics subject to change without notice
17
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
50h to 5Fh, 60h to 6Fh, and 70h to 7Fh store the
correction profiles for LUT1, LUT2, and LUT3
respectively.
approximately every 2.5 seconds. The proprietary
TM
LED-Sense algorithm allows direct measurement of
LED junction temperatures on the TSENSEx sensing
channels, without the need for an external
temperature sensor. Additionally an on-chip silicon
temperature sensing diode is also measured to
enhance temperature estimation accuracy.
Figure 11: Global Dimming in Logarithmic Mode
in percent vs. register 04h data
(0% dimming = full LED brightness)
2
I C Interface
2
The LDS9003/9001 uses a 2-wire serial I C-bus
interface. The SDAT and SCLK lines comply with the
2
I C electrical specification and should be terminated
with pull-up resistors to the logic voltage supply.
When the bus is not used, both lines are high. The
device supports a maximum bus speed of 400kbit/s.
The serial bit sequence is shown at REGISTER
DEFINITION AND PROGRAMMING section for read
and write operations into the registers. Read and
write instructions are initiated by the master
controller/CPU and acknowledged by the slave LED
driver.
The LDS9003/9001 allows user to choose between
2
two I C addresses by connecting SADD pin (#3)
either to ground, or VIN pin (see Table ).
Each register stores a 4 bit adjustment code for two
5ºC temperature steps in its lower (bits 3:0) and
higher (bits 7:4) nibble. User loadable PWM
correction codes in the 1x scale mode represent 0 to
-7 PWM de-rating steps. In the 2 x scale mode the
correction codes represent 0 to -14 PWM steps.
2
Table 13: LDS9003/9001 I C Slave Addresses
SADD pin
connected to
Ground
V IN
Additionally, the IPWM current sources are disabled
(i.e. 0 DC current = 0% PWM duty cycle) if the
measured LED junction temperature exceeds a
preset value that is loaded in register 4Ah
Hex
11h
55h
2
For further details on the I C protocol, please refer to
2
the I C-Bus Specification, document number 9398393-40011, from Philips Semiconductors.
TM
The LED-Sense engine periodically measures the
LED junction temperature on three TSENSEx
channels (just TSENSE for LDS9001) and encodes
0
the value into 5-bit T-codes representing 5 C
0
temperature intervals from -35 to +120 C.
Over-Temperature Protection
If the die temperature exceeds +150°C, the driver will
enter shutdown mode. The LDS9003/9001 requires
restart after die temperature falls below 130°C.
The measured T-code value addresses the stored
ΔPWM correction codes stored in the LUT registers
to adjust the PWM duty cycle. Therefore this reduces
the average current through the LEDs as defined by
the LUT table.
OPTIONAL USE of EXTERNAL TEMPERATURE
DIODE
The LDS9003/9001 also provides the option for using
an external remote temperature-sensing diode device
such as a 2N3904. To use this option the diode
anode should be connected to the corresponding
TSENSEx channel. The cathode should be
connected to GND.
The user loads specific ΔPWM correction codes into
the LUT(s) for every 5ºC temperature step from
35ºC to 120ºC, as prior discussed, to meet desired
current and power vs LED junction temperature.
LUT correction codes are subtracted from the userset duty cycle/dimming code (dynamic mode) loaded
in registers 05h, 06h, and 07h and the global
dimming level code, if used, to maintain reliable LED
current levels.
STANDBY MODE
The LDS9003/9001 has a “soft” standby or sleep
2
mode, which the customer may set by I C interface
by addressing register 1Fh with bit 6 = 1 (see Table
4).
The LDS9003/9001 includes a 10-bit ADC and digital
processing engine to determine LED temperatures
© 2009 IXYS Corp.
Characteristics subject to change without notice
2
I C Address
Binary code
001 0001
101 0101
18
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
2
PROGRAMMING MODES
In Standby Mode, the I C interface remains active
and all registers retain their programmed information.
The LDS9003/9001 is factory pre-programmed with
certain default POR levels to facilitate both factory
testing and user operation. However, specific LEDs
and other user system conditions require user
programming of the temperature compensation LUTs
and other LED specific parameters.
Further in Standby Mode the IPWMx current drivers
and internal clock are powered off; however, internal
regulators and reference circuits remain active to
insure power to the digital sections to hold register
2
values and maintain I C interface communications.
This results in standby current ~ 100 µA typical. For
this mode, the EN pin should be logic HIGH with
signal level from 1.3 to V IN voltage.
The loading of these registers can easily be
conducted with a low cost “boot” type microcontroller
having non-volatile memory to hold system and user
parameters. 1K bits of non-volatile data storage is
sufficient for the LDS9003. 256 bits is required for the
LDS9001.
SHUTDOWN MODE
To set LDS9003/9001 into the shutdown mode, the
EN pin should be logic low more than 10 ms. The
LDS9003/9001 shutdown current is less than 1 µA.
After initialization and user programming the user
2
should conduct an I C calibration sequence
command by writing Bit 4 = 1 in the Control register
1Fh. This conducts a real time calibration of the initial
starting temperature and actual LED parameters.
Upon completion, Bit 4 will be internally reset to 0,
and the LDS9003/9001 is ready for use.
The LDS9003/9001 wakes up from shutdown mode
with factory-preset default data. To preserve
customer-programmed data, use the standby mode.
© 2009 IXYS Corp.
Characteristics subject to change without notice
19
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
DETAILED WLED LIGHTING SYSTEM APPLICATION
LDS9001
Monitoring / Controlling 3 Series WLEDs
µController Requirements:
* Non-Volatile Memory for Program and Data Storage
• 1K Bytes
Program Memory Downloads Stored Calibration Parameters & Temperature Correction Curves
2
Via I C to LDS9001
• 64 Bytes Data Memory Stores Calibration Parameters and Temp Correction Curves
** Eight Bit Integrated ADC (If Optional External Dimming Used)
• Polls Dimming Pot, Converts to Digital PWM Code & Transmit to LDS9001 via I2 C
© 2009 IXYS Corp.
Characteristics subject to change without notice
20
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
PACKAGE DRAWING AND DIMENSIONS
16-PIN TQFN (HV3), 3mm x 3mm, 0.5mm PITCH
SYMBOL
A
A1
A2
b
D
D1
E
E1
e
L
m
n
MIN
0.70
0.00
0.178
0.20
2.95
1.65
2.95
1.65
0.325
NOM
0.75
0.02
0.203
0.25
3.00
1.70
3.00
1.70
0.50 typ
0.375
0.150 typ
0.225 typ
MAX
0.80
0.05
0.228
0.30
3.05
1.75
3.05
1.75
0.425
Note:
1. All dimensions are in millimeters
2. Complies with JEDEC Standard MO-220
© 2009 IXYS Corp.
Characteristics subject to change without notice
21
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
PACKAGE DRAWING AND DIMENSIONS
8-PIN TDFN, 2mm x 3mm, 0.5mm PITCH
SYMBOL
A
A1
A2
b
D
D1
E
E1
e
L
MIN
0.700
0.180
2.950
1.750
1.950
1.550
0.350
NOM
0.750
0.000
0.203 Ref.
0.230
3.000
1.800
2.000
1.600
0.500 Bsc
0.400
MAX
0.800
0.050
0.280
3.050
1.850
2.050
1.650
0.450
Note:
3. All dimensions are in millimeters
4. Complies with JEDEC Standard MO-220
© 2009 IXYS Corp.
Characteristics subject to change without notice
22
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
ORDERING INFORMATION
Part Number
LDS9003 002-T2
LDS89001 008-T2
Notes:
1.
2.
Package
Package Marking
(1)
TQFN-16 3 x 3 mm
9003
(1)
9001
DFN-8 3 x 2 mm
Matte-Tin Plated Finish (RoHS-compliant)
Quantity per reel is 2000
EXAMPLE OF ORDERING INFORMATION
Prefix
LDS
Device #
Suffix
9003 or 9001
002
Product Number
Optional
Company ID
Package
T2
Tape & Reel
T: Tape & Reel
2: 2000/Reel
002: 3x3 TQFN
008: 3x2 DFN
Notes:
1) All packages are RoHS-compliant (Lead-free, Halogen-free).
2) The standard lead finish is Matte-Tin.
3) The device used in the above example is a LDS9003A 002–
T2 (3x3 TQFN, Tape & Reel).
4) For additional package and temperature options, please
contact your nearest IXYS Corp. Sales office.
© 2009 IXYS Corp.
Characteristics subject to change without notice
23
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
Appendix 1
# of steps
Hex code
Dimming,
dB
Dimming,
%
# of steps
Hex code
Dimming,
dB
Dimming,
%
# of steps
Hex code
Dimming,
dB
Dimming,
%
Table 14 Dynamic Mode Dimming in Logarithmic Mode vs. register 05h - 07h data
0
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
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
11
12
13
14
15
16
17
18
19
1A
1B
1C
1D
1E
1F
-72.3
-66.3
-62.8
-60.3
-58.3
-56.7
-55.4
-54.3
-53.2
-52.3
-51.5
-50.7
-50
-49.4
-48.8
-48.2
-47.7
-47.2
-46.7
-46.3
-45.9
-45.5
-45.1
-44.7
-44.4
-44
-43.7
-43.4
-43.1
-42.8
-42.5
100
99.98
99.95
99.93
99.90
99.88
99.85
99.83
99.80
99.78
99.76
99.73
99.71
99.68
99.66
99.63
99.61
99.58
99.56
99.54
99.51
99.49
99.46
99.44
99.41
99.39
99.37
99.34
99.32
99.29
99.27
99.24
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
20
21
22
23
24
25
26
27
28
29
2A
2B
2C
2D
2E
2F
30
31
32
33
34
35
36
37
38
39
3A
3B
3C
3D
3E
3F
-41.9
-41.4
-40.9
-40.5
-40.1
-39.6
-39.2
-38.9
-38.5
-38.2
-37.8
-37.5
-37.2
-36.9
-36.6
-36.3
-36.1
-35.8
-35.5
-35.3
-35
-34.8
-34.6
-34.4
-34.1
-33.9
-33.7
-33.5
-33.3
-33.1
-32.9
-32.8
99.19
99.15
99.10
99.05
99.00
98.95
98.90
98.85
98.80
98.75
98.71
98.66
98.61
98.56
98.51
98.46
98.41
98.36
98.32
98.27
98.22
98.17
98.12
98.07
98.02
97.97
97.92
97.88
97.83
97.78
97.73
97.68
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
40
41
42
43
44
45
46
47
48
49
4A
4B
4C
4D
4E
4F
50
51
52
53
54
55
56
57
58
59
5A
5B
5C
5D
5E
5F
-32.6
-32.4
-32.2
-32.1
-31.9
-31.7
-31.6
-31.4
-31.3
-31.1
-30.9
-30.8
-30.7
-30.5
-30.4
-30.2
-30.1
-30
-29.8
-29.7
-29.6
-29.5
-29.3
-29.2
-29.1
-29
-28.8
-28.7
-28.6
-28.5
-28.4
-28.3
97.63
97.58
97.53
97.49
97.44
97.39
97.34
97.29
97.24
97.19
97.14
97.09
97.05
97.00
96.95
96.90
96.85
96.80
96.75
96.70
96.66
96.61
96.56
96.51
96.46
96.41
96.36
96.31
96.26
96.22
96.17
96.12
Continued
© 2009 IXYS Corp.
Characteristics subject to change without notice
24
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
Table 14 Dynamic Mode Dimming in Logarithmic Mode vs. register 05h – 07h data
# of steps
Hex code
Dimming,
dB
Dimming,
%
# of steps
Hex code
Dimming,
dB
Dimming,
%
# of steps
Hex code
Dimming,
dB
Dimming,
%
Continue
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
60
61
62
63
64
65
66
67
68
69
6A
6B
6C
6D
6E
6F
70
71
72
73
74
75
76
77
78
79
7A
7B
7C
7D
7E
7F
-28.1
-27.9
-27.7
-27.5
-27.3
-27.1
-26.9
-26.7
-26.5
-26.3
-26.2
-26
-25.8
-25.7
-25.5
-25.3
-25.2
-25
-24.9
-24.7
-24.6
-24.5
-24.3
-24.2
-24
-23.9
-23.8
-23.7
-23.5
-23.4
-23.3
-23.2
96.02
95.92
95.83
95.73
95.63
95.53
95.43
95.34
95.24
95.14
95.04
94.95
94.85
94.75
94.65
94.56
94.46
94.36
94.26
94.17
94.07
93.97
93.87
93.77
93.68
93.58
93.48
93.38
93.29
93.19
93.09
92.99
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
80
81
82
83
84
85
86
87
88
89
8A
8B
8C
8D
8E
8F
90
91
92
93
94
95
96
97
98
99
9A
9B
9C
9D
9E
9F
-22.9
-22.7
-22.5
-22.2
-22
-21.8
-21.6
-21.4
-21.2
-21
-20.8
-20.6
-20.5
-20.3
-20.1
-20
-19.8
-19.6
-19.5
-19.3
-19.2
-19
-18.9
-18.7
-18.6
-18.4
-18.3
-18.1
-18
-17.9
-17.7
-17.6
92.80
92.60
92.41
92.21
92.02
91.82
91.63
91.43
91.24
91.04
90.84
90.65
90.45
90.26
90.06
89.87
89.67
89.48
89.28
89.09
88.89
88.70
88.50
88.31
88.11
87.92
87.72
87.52
87.33
87.13
86.94
86.74
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
AA
AB
AC
AD
AE
AF
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
BA
BB
BC
BD
BE
BF
-17.4
-17.1
-16.9
-16.6
-16.4
-16.2
-16
-15.8
-15.6
-15.4
-15.2
-15
-14.8
-14.6
-14.4
-14.3
-14.1
-13.9
-13.8
-13.6
-13.4
-13.3
-13.1
-13
-12.8
-12.7
-12.5
-12.4
-12.3
-12.1
-12
-11.8
86.35
85.96
85.57
85.18
84.79
84.40
84.01
83.62
83.23
82.84
82.45
82.06
81.67
81.27
80.88
80.49
80.10
79.71
79.32
78.93
78.54
78.15
77.76
77.37
76.98
76.59
76.20
75.81
75.42
75.02
74.63
74.24
Continued
© 2009 IXYS Corp.
Characteristics subject to change without notice
25
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
Table 14 Dynamic Mode Dimming in Logarithmic Mode vs. register 05h – 07h data
# of steps
Hex code
Dimming,
dB
Dimming,
%
# of steps
Hex code
Dimming,
dB
Dimming,
%
Continue
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
C0
C1
C2
C3
C4
C5
C6
C7
C8
C9
CA
CB
CC
CD
CE
CF
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
DA
DB
DC
DD
DE
DF
-11.6
-11.3
-11.1
-10.9
-10.6
-10.4
-10.2
-10
-9.8
-9.5
-9.3
-9.2
-9
-8.8
-8.6
-8.4
-8.2
-8.1
-7.9
-7.7
-7.6
-7.4
-7.3
-7.1
-6.9
-6.8
-6.7
-6.5
-6.4
-6.2
-6.1
-6
73.46
72.68
71.90
71.12
70.34
69.56
68.77
67.99
67.21
66.43
65.65
64.87
64.09
63.31
62.52
61.74
60.96
60.18
59.40
58.62
57.84
57.06
56.27
55.49
54.71
53.93
53.15
52.37
51.59
50.81
50.02
49.24
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
E0
E1
E2
E3
E4
E5
E6
E7
E8
E9
EA
EB
EC
ED
EE
EF
F0
F1
F2
F3
F4
F5
F6
F7
F8
F9
FA
FB
FC
FD
FE
FF
-5.7
-5.4
-5.2
-4.9
-4.7
-4.5
-4.3
-4
-3.8
-3.6
-3.4
-3.2
-3
-2.8
-2.7
-2.5
-2.3
-2.1
-2
-1.8
-1.6
-1.5
-1.3
-1.2
-1
-0.8
-0.7
-0.6
-0.4
-0.3
-0.1
0
47.68
46.12
44.56
42.99
41.43
39.87
38.31
36.74
35.18
33.62
32.06
30.49
28.93
27.37
25.81
24.24
22.68
21.12
19.56
17.99
16.43
14.87
13.31
11.74
10.18
8.62
7.06
5.49
3.93
2.37
0.81
0.00
© 2009 IXYS Corp.
Characteristics subject to change without notice
26
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
Appendix 2
# of steps
Hex code
Dimming,
dB
Dimming,
%
# of steps
Hex code
Dimming,
dB
Dimming,
%
# of steps
Hex code
Dimming,
dB
Dimming,
%
Table 15 Global Dimming in Logarithmic Mode vs. register 04h data
0
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
0
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
11
12
13
14
15
16
17
18
19
1A
1B
1C
1D
1E
1F
0
-0.1
-0.3
-0.4
-0.6
-0.7
-0.8
-1
-1.2
-1.3
-1.5
-1.6
-1.8
-2
-2.1
-2.3
-2.5
-2.7
-2.8
-3
-3.2
-3.4
-3.6
-3.8
-4
-4.3
-4.5
-4.7
-4.9
-5.2
-5.4
-5.7
0.00
0.81
2.37
3.93
5.49
7.06
8.62
10.18
11.74
13.31
14.87
16.43
17.99
19.56
21.12
22.68
24.24
25.81
27.37
28.93
30.49
32.06
33.62
35.18
36.74
38.31
39.87
41.43
42.99
44.56
46.12
47.68
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
20
21
22
23
24
25
26
27
28
29
2A
2B
2C
2D
2E
2F
30
31
32
33
34
35
36
37
38
39
3A
3B
3C
3D
3E
3F
-6
-6.1
-6.2
-6.4
-6.5
-6.7
-6.8
-6.9
-7.1
-7.3
-7.4
-7.6
-7.7
-7.9
-8.1
-8.2
-8.4
-8.6
-8.8
-9
-9.2
-9.3
-9.5
-9.8
-10
-10.2
-10.4
-10.6
-10.9
-11.1
-11.3
-11.6
49.24
50.02
50.81
51.59
52.37
53.15
53.93
54.71
55.49
56.27
57.06
57.84
58.62
59.40
60.18
60.96
61.74
62.52
63.31
64.09
64.87
65.65
66.43
67.21
67.99
68.77
69.56
70.34
71.12
71.90
72.68
73.46
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
40
41
42
43
44
45
46
47
48
49
4A
4B
4C
4D
4E
4F
50
51
52
53
54
55
56
57
58
59
5A
5B
5C
5D
5E
5F
-11.8
-12
-12.1
-12.3
-12.4
-12.5
-12.7
-12.8
-13
-13.1
-13.3
-13.4
-13.6
-13.8
-13.9
-14.1
-14.3
-14.4
-14.6
-14.8
-15
-15.2
-15.4
-15.6
-15.8
-16
-16.2
-16.4
-16.6
-16.9
-17.1
-17.4
74.24
74.63
75.02
75.42
75.81
76.20
76.59
76.98
77.37
77.76
78.15
78.54
78.93
79.32
79.71
80.10
80.49
80.88
81.27
81.67
82.06
82.45
82.84
83.23
83.62
84.01
84.40
84.79
85.18
85.57
85.96
86.35
Continued
© 2009 IXYS Corp.
Characteristics subject to change without notice
27
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
Table 15 Global Dimming in Logarithmic Mode vs. register 04h data
# of steps
Hex code
Dimming,
dB
Dimming,
%
# of steps
Hex code
Dimming,
dB
Dimming,
%
# of steps
Hex code
Dimming,
dB
Dimming,
%
Continue
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
60
61
62
63
64
65
66
67
68
69
6A
6B
6C
6D
6E
6F
70
71
72
73
74
75
76
77
78
79
7A
7B
7C
7D
7E
7F
-17.6
-17.7
-17.9
-18
-18.1
-18.3
-18.4
-18.6
-18.7
-18.9
-19
-19.2
-19.3
-19.5
-19.6
-19.8
-20
-20.1
-20.3
-20.5
-20.6
-20.8
-21
-21.2
-21.4
-21.6
-21.8
-22
-22.2
-22.5
-22.7
-22.9
86.74
86.94
87.13
87.33
87.52
87.72
87.92
88.11
88.31
88.50
88.70
88.89
89.09
89.28
89.48
89.67
89.87
90.06
90.26
90.45
90.65
90.84
91.04
91.24
91.43
91.63
91.82
92.02
92.21
92.41
92.60
92.80
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
80
81
82
83
84
85
86
87
88
89
8A
8B
8C
8D
8E
8F
90
91
92
93
94
95
96
97
98
99
9A
9B
9C
9D
9E
9F
-23.2
-23.3
-23.4
-23.5
-23.7
-23.8
-23.9
-24
-24.2
-24.3
-24.5
-24.6
-24.7
-24.9
-25
-25.2
-25.3
-25.5
-25.7
-25.8
-26
-26.2
-26.3
-26.5
-26.7
-26.9
-27.1
-27.3
-27.5
-27.7
-27.9
-28.1
92.99
93.09
93.19
93.29
93.38
93.48
93.58
93.68
93.77
93.87
93.97
94.07
94.17
94.26
94.36
94.46
94.56
94.65
94.75
94.85
94.95
95.04
95.14
95.24
95.34
95.43
95.53
95.63
95.73
95.83
95.92
96.02
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
AA
AB
AC
AD
AE
AF
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
BA
BB
BC
BD
BE
BF
-28.3
-28.4
-28.5
-28.6
-28.7
-28.8
-29
-29.1
-29.2
-29.3
-29.5
-29.6
-29.7
-29.8
-30
-30.1
-30.2
-30.4
-30.5
-30.7
-30.8
-30.9
-31.1
-31.3
-31.4
-31.6
-31.7
-31.9
-32.1
-32.2
-32.4
-32.6
96.12
96.17
96.22
96.26
96.31
96.36
96.41
96.46
96.51
96.56
96.61
96.66
96.70
96.75
96.80
96.85
96.90
96.95
97.00
97.05
97.09
97.14
97.19
97.24
97.29
97.34
97.39
97.44
97.49
97.53
97.58
97.63
Continued
© 2009 IXYS Corp.
Characteristics subject to change without notice
28
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
Table 15 Global Dimming in Logarithmic Mode vs. register 04h data
# of steps
Hex code
Dimming,
dB
Dimming,
%
# of steps
Hex code
Dimming,
dB
Dimming,
%
Continue
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
C0
C1
C2
C3
C4
C5
C6
C7
C8
C9
CA
CB
CC
CD
CE
CF
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
DA
DB
DC
DD
DE
DF
-32.8
-32.9
-33.1
-33.3
-33.5
-33.7
-33.9
-34.1
-34.4
-34.6
-34.8
-35
-35.3
-35.5
-35.8
-36.1
-36.3
-36.6
-36.9
-37.2
-37.5
-37.8
-38.2
-38.5
-38.9
-39.2
-39.6
-40.1
-40.5
-40.9
-41.4
-41.9
97.68
97.73
97.78
97.83
97.88
97.92
97.97
98.02
98.07
98.12
98.17
98.22
98.27
98.32
98.36
98.41
98.46
98.51
98.56
98.61
98.66
98.71
98.75
98.80
98.85
98.90
98.95
99.00
99.05
99.10
99.15
99.19
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
E0
E1
E2
E3
E4
E5
E6
E7
E8
E9
EA
EB
EC
ED
EE
EF
F0
F1
F2
F3
F4
F5
F6
F7
F8
F9
FA
FB
FC
FD
FE
FF
-42.5
-42.8
-43.1
-43.4
-43.7
-44
-44.4
-44.7
-45.1
-45.5
-45.9
-46.3
-46.7
-47.2
-47.7
-48.2
-48.8
-49.4
-50
-50.7
-51.5
-52.3
-53.2
-54.3
-55.4
-56.7
-58.3
-60.3
-62.8
-66.3
-72.3
99.24
99.27
99.29
99.32
99.34
99.37
99.39
99.41
99.44
99.46
99.49
99.51
99.54
99.56
99.58
99.61
99.63
99.66
99.68
99.71
99.73
99.76
99.78
99.80
99.83
99.85
99.88
99.90
99.93
99.95
99.98
100
© 2009 IXYS Corp.
Characteristics subject to change without notice
29
Doc. No. 9003/9001_DS, Rev. N1.0
LDS9003 / 9001
Warranty and Use
IXYS CORP. MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE, EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF ITS PRODUCTS FOR ANY
PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS OR THE RIGHTS OF THIRD
PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY ARISING OUT OF ANY SUCH
USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES.
IXYS Corp. products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended
to support or sustain life, or for any other application in which the failure of the IXYS Corp. product could create a situation where personal injury or death may occur.
IXYS Corp. reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets labeled "Advance
Information" or "Preliminary" and other products described herein may not be in production or offered for sale.
IXYS Corp. advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate typical semiconductor
applications and may not be complete.
IXYS Corp.
1590 Buckeye Dr.,
Milpitas, CA 95035-7418
Phone: 408.457.9000
Fax:
408.496.0222
http://www.ixys.com
© 2009 IXYS Corp.
Characteristics subject to change without notice
Document N: 9003/01_DS
Revision:
N1.0
Issue date:
10/20/2009
30
Doc. No. 9003/9001_DS, Rev. N1.0
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