BD2802GU-E2

System LED Drivers for Mobile phones 6LEDs Illumination BD2802GU No.11041EAT12 ●Description The BD2802GU is a RGB LED driver specifically engineered for decoration purposes.This RGB driver incorporates lighting patterns and illuminates without imposing any load on CPU.This RGB driver is best-suited for illumination using RGB LEDs and decoration using monochrome LEDs.In addition, this RGB driver has been successfully miniaturized through the use of a VCSP85H2 (2.8 mm 0.5 mm pitch) chip size package. ●Features 1) RGB LED driver (dual drivers) - A slope control function is incorporated (allowing dual drivers to be controlled independently). - Slope control can be implemented using the DC current. - Two modes “continuous illumination mode” and “illumination single cycle mode” are supported. - Independent external ON/OFF synchronizing terminals (of dual drivers) are provided. 2 - Multiple drivers can be used concurrently by using the I C address change function and supporting reference clock I/O. 2) Thermal shutdown 3) I2C BUS fast mode support (maximum rate: 400 kHz) - A device address can be changed via an external pin. * * * This driver has not been designed for anti-radiation. This document may be altered without prior notice. This document does not provide for delivery. ●Absolute Maximum Ratings(Ta=25℃) Parameter Maximum Applied voltage Power Dissipation Operating Temperature Range Storage Temperature Range Symbol Limits Unit VMAX 7 V Pd 1250 (Note1) mW Topr -40 ～ +85 ℃ Tstg -55 ～ +150 ℃ o o (Note1)Power dissipation deleting is 10.0mW/ C, when it’s used in over 25 C. (It’s deleting is on the board that is ROHM’s standard) ●Recommended Operating Conditions(VBAT≧VIO, Ta=-40～85℃) Parameter VBAT input voltage VIO pin voltage www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. Symbol Limits Unit VBAT 2.7 ～ 5.5 V VIO 1.65 ～ 3.3 V 1/27 2011.04 - Rev.A Technical Note BD2802GU ●Electrical Characteristics(Unless otherwise specified, Ta=25℃, VBAT=3.6V, VIO=1.8V) Limits Parameter Symbol Unit Min. Typ. Max. Condition 【Circuit Current】 VBAT Circuit current 1 IBAT1 - 0.1 3.0 μA RESETB=0V, VIO =0V VBAT Circuit current 2 IBAT2 - 0.5 3.0 μA RESETB=0V, VIO=1.8V VBAT Circuit current 3 IBAT3 - 0.8 1.2 mA LED 6Ch ON, ILED=10mA setting Exclusive of LED current, RGBISET =120kΩ step RGB1 group, RGB2 group 【LED Driver】 LED current Step ILEDSTP 128 LED Maximum setup curren IMAX - - 30.48 mA LED current accurate ILED 18 20 22 mA LED current Matching ILEDMT - 5 10 % LED OFF Leak current ILKL - - 1.0 μA fosc 0.8 1.0 1.2 MHz RGB1 group, RGB2 group RGBISET=100kΩ RGB1 group, RGB2 group, Terminal voltage =1V ILED=20mA setting, RGBISET =120kΩ RGB1 group, between RGB2 group, Terminal voltage =1V ILED=20mA setting 【OSC】 OSC oscillation frequency 【SDA, SCL】(I2C interface ) L level input voltage VILI -0.3 - 0.25×VIO V H level input voltage VIHI 0.75×VIO - VBAT+0.3 V Hysteresis of Schmitt trigger input VhysI 0.05×VIO - - V L level output voltage VOLI 0 - 0.3 V SDA pin, IOL=3 mA linI -10 - 10 μA Input voltage = 0.1×VIO～0.9×VIO L level input voltage VILR -0.3 - 0.25×VIO V H level input voltage VIHR 0.75×VIO - VBAT+0.3 V Input current IinR -10 - 10 μA -0.3 Input current 【RESETB】(CMOS input pin) Input voltage = 0.1×VIO～0.9×VIO 【ADDSEL】(CMOS input pin) L level input voltage VILADD - 0.25×VBAT V H level input voltage VIHADD 0.7 ×VBAT - VBAT+0.3 V Input current IinADD - 10 μA -10 Input voltage = 0.1×VBAT～0.9×VBAT 【RGB1CNT, RGB2CNT】(CMOS input pin with Pull-down resistance) L level input voltage VILCNT -0.3 H level input voltage VIHCNT IinCNT Input current - 0.25×VIO V 0.75×VIO - VBAT+0.3 V - 3.6 10 μA Input voltage = 1.8V 【CLKIO(Output)】(CMOS output pin) L level output voltage VOLCLK - - 0.2 V IOL=1mA H level output voltage VOHCLK VIO-0.2 - - V IOH=1mA fclk 200 250 300 kHz - 0.25×VIO V Output frequency 【CLKIO (Input)】(CMOS input pin) L level input voltage VILCLK -0.3 H level input voltage VIHCLK 0.75×VIO - VIO+0.3 V Input current IinCLK - 3.6 10 μA www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 2/27 Input voltage = 1.8V 2011.04 - Rev.A Technical Note BD2802GU ●Block Diagram / Application Circuit example VBAT VBAT2 VBAT1 VBAT VREF 1µF/10V R1LED VIO 1µF/10V RESETB Slope Control G1LED (RGB1) B1LED RGB1 R2LED SCL SDA 2 Level I C interface Shift Digital Control I/O Slope Control G2LED (RGB2) B2LED RGB2 RGB1CNT RGBGND RGB2CNT CLKIO ADDSEL CLKIO RGBISET IREF GND2 GND1 T4 T3 T2 T1 TSD Fig.3 Block Diagram / Application Circuit example ●Pin Arrangement ［Bottom View］ E T4 D B2LED C VBAT2 B GND1 A T1 1 G2LED RGBGND R2LED B1LED G1LED T3 R1LED VBAT1 RGBISE RGB1CNT ADDSEL GND2 index www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. CLKIO SCL SDA RGB2CNT VIO RESETB T2 2 3 4 5 3/27 2011.04 - Rev.A Technical Note BD2802GU ●Outside size figure VCSP85H2 CSP small Package Size : 2.8mm×2.8mm (Tolerance : ± 0.1mm each side) height 1.0mm max Ball pitch : 0.5 mm www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 4/27 2011.04 - Rev.A Technical Note BD2802GU ●Pin Functions Input Level For Power For GND No Pin No. Pin Name I/O ESD Diode Functions 1 D5 VBAT1 - - GND Battery is connected A 2 C1 VBAT2 - - GND Battery is connected A 3 A1 T1 - VBAT GND Test Pin (short to GND) S 4 A5 T2 - VBAT GND Test Pin (short to GND) S 5 E5 T3 - VBAT GND Test Pin (short to GND) S 6 E1 T4 - VBAT - Test Pin (short to GND) B 7 A3 VIO - VBAT GND I/O voltage source is connected C 8 A4 RESETB I VBAT GND Reset input (L: RESET, H: RESET cancel) H 9 B5 SDA I/O VBAT GND I2C data input I 10 B4 SCL I VBAT GND I2C clock input H 11 B1 GND1 - VBAT - Ground B 12 C5 GND2 - VBAT - Ground B 13 E3 RGBGND - VBAT - Ground B 14 C2 RGBISET I VBAT GND RGB LED reference current O 15 D4 R1LED I - GND Red LED1 connected E 16 E4 G1LED I - GND Green LED1 connected E 17 D3 B1LED I - GND Blue LED1 connected E 18 D2 R2LED I - GND Red LED2 connected E 19 E2 G2LED I - GND Green LED2 connected E 20 D1 B2LED I - GND Blue LED2 connected E 21 C3 RGB1CNT I VBAT GND RGB1 LED external ON/OFF Synchronism (L：OFF, H：ON)* J 22 A2 RGB2CNT I VBAT GND RGB2 LED external ON/OFF Synchronism (L：OFF, H：ON)* J 23 C4 ADDSEL I VBAT GND I2C device address change terminal R 24 B3 CLKIO I/O VBAT GND Standard clock input-and-output terminal V * A setup of a register is separately necessary to validate it. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 5/27 2011.04 - Rev.A Technical Note BD2802GU ●Equivalent circuit diagram A B VBAT G C VBAT E VIO I VBAT VBAT O VBAT U F VBAT J VBAT VIO L VBAT VBAT N Q VBAT VBAT R VBAT VBAT S VBAT VBAT V VBAT X VBAT VBAT VIO H VIO www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. VBAT 6/27 VIO VBAT 2011.04 - Rev.A Technical Note BD2802GU ●I2C BUS format The writing operation is based on the I2C slave standard. ・Slave address A7 A6 A5 A4 A3 A2 A1 R/W ADDSEL=L 0 0 1 1 0 1 0 0 ADDSEL=H 0 0 1 1 0 1 1 0 Slave address can be changed with the external terminal ADDSEL. ・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 P STOP condition START 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 9 clock pulse for acknowledgement START condition www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 8 S 7/27 2011.04 - Rev.A Technical Note BD2802GU ・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 S X X X X X X X 0 A A7 A6 A5 A4 A3 A2 A1 A0 A D7 D6 D5 D4 D3 D2 D1 D0 A slave address register address *1 D7 D6 D5 D4 D3 D2 D1 D0 A P DATA DATA register address increment R/W=0(write) register address increment A=acknowledge(SDA LOW) A=not acknowledge(SDA HIGH) S=START condition P=STOP condition *1: Write Timing from master to slave from slave to master ●Timing diagram SDA t BUF t SU;DAT t LOW t HD;STA SCL t HD;STA S t SU;STO t SU;STA t HD;DAT Sr t HIGH P ●Electrical Characteristics(Unless otherwise specified, Ta=25 oC, VBAT=3.6V, VIO=1.8V) Standard-mode Parameter Symbol Min. Typ. Max. Min. 【I2C BUS format】 SCL clock frequency fSCL 0 100 0 LOW period of the SCL clock tLOW 4.7 1.3 HIGH period of the SCL clock tHIGH 4.0 0.6 Hold time (repeated) START condition After this period, the first clock is generated 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 www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. S Fast-mode Typ. Max. - 400 - kHz μs μs Unit tHD;STA 4.0 - - 0.6 - - μs tSU;STA 4.7 - - 0.6 - - μs tHD;DAT tSU;DAT tSU;STO 0 250 4.0 - 3.45 - 0 100 0.6 - 0.9 - μs ns μs tBUF 4.7 - - 1.3 - - μs 8/27 2011.04 - Rev.A Technical Note BD2802GU ●Register map Resister data Address W/R Function D7 D6 D5 D4 D3 D2 D1 D0 00h W - - CLKMD CLKEN - - - SFTRST Soft Reset clock setup 01h W - RGB2MEL RGB2OS RGB2EN - RGB1MEL RGB1OS RGB1EN RBG-LED control 02h W - TRGB1(2) TRGB1(1) TRGB1(0) RGB1-hour setup 03h W - IR11(6) IR11(5) IR11(4) IR11(3) IR11(2) IR11(1) IR11(0) R1 current 1 setup 04h W - IR12(6) IR12(5) IR12(4) IR12(3) IR12(2) IR12(1) IR12(0) R1 current 2 setup 05h W - - - - PR1(3) PR1(2) PR1(1) PR1(0) R1 Wave patturn setup 06h W - IG11(6) IG11(5) IG11(4) IG11(3) IG11(2) IG11(1) IG11(0) G1 current 1 setup 07h W - IG12(6) IG12(5) IG12(4) IG12(3) IG12(2) IG12(1) IG12(0) G1 current 2 setup 08h W - - - - PG1(3) PG1(2) PG1(1) PG1(0) G1 Wave patturn setup 09h W - IB11(6) IB11(5) IB11(4) IB11(3) IB11(2) IB11(1) IB11(0) B1 current 1 setup 0Ah W - IB12(6) IB12(5) IB12(4) IB12(3) IB12(2) IB12(1) IB12(0) B1 current 2 setup 0Bh W - - - - PB1(3) PB1(2) PB1(1) PB1(0) B1 Wave patturn setup 0Ch W - TRGB2(2) TRGB2(1) TRGB2(0) RGB2-hour setup 0Dh W - IR21(6) IR21(5) IR21(4) IR21(3) IR21(2) IR21(1) IR21(0) R2 current 1 setup 0Eh W - IR22(6) IR22(5) IR22(4) IR22(3) IR22(2) IR22(1) IR22(0) R2 current 2 setup 0Fh W - - - - PR2(3) PR2(2) PR2(1) PR2(0) R2 Wave patturn 10h W - IG21(6) IG21(5) IG21(4) IG21(3) IG21(2) IG21(1) IG21(0) G2 current 1 setup 11h W - IG22(6) IG22(5) IG22(4) IG22(3) IG22(2) IG22(1) IG22(0) G2 current 2 setup 12h W - - - - PG2(3) PG2(2) PG2(1) PG2(0) G2 Wave patturn setup 13h W - IB21(6) IB21(5) IB21(4) IB21(3) IB21(2) IB21(1) IB21(0) B2 current 1 setup 14h W - IB22(6) IB22(5) IB22(4) IB22(3) IB22(2) IB22(1) IB22(0) B2 current 2 setup 15h W - - - - PB2(3) PB2(2) PB2(1) PB2(0) B2 Wave patturn setup SFRGB1(1) SFRGB1(0) SRRGB1(1) SRRGB1(0) SFRGB2(1) SFRGB2(0) SRRGB2(1) SRRGB2(0) Input "0” for "-". Vacancy address may be use for test. Prohibit to accessing the address that isn’t mentioned and the register for test. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 9/27 2011.04 - Rev.A Technical Note BD2802GU ●Register Description Adress 00h BIT Name Initial D7 D6 D5 D4 D3 D2 D1 D0 CLKMD CLKEN SFTRST 0 0 0 Adress 01h 1 Clock Output mode Clock input and output Effective Reset BIT Name Init D7 D6 D5 D4 D3 D2 D1 D0 RGB2MEL RGB2OS RGB2EN RGB1MEL RGB1OS RGB1EN 0 0 0 0 0 0 * * Function 0 Clock Input mode Clock input and output invalid Reset Release Function 0 RGB2 external control invalid RGB2 Stop RGB2 Stop RGB1 external control invalid RGB1 Stop RGB1 Stop 1 RGB2 external control valid RGB2 1 periodic operation RGB2 continuous operation RGB1 external control valid RGB1 1 periodic operation RGB1 continuous operation RGB*OS returns to 0 automatically after 1 cycle operation. RGB*EN precedes to RGB*OS. In use in 1 cycle operation, there is the necessity for RGB*EN=0. Adress 02h BIT Name Init D7 SFRGB1(1) 0 D6 SFRGB1(0) 0 D5 SRRGB1(1) 0 D4 SRRGB1(0) 0 D3 - - D2 TRGB1(2) 0 D1 TRGB1(1) 0 D0 TRGB1(0) 0 Function 0 1 SFRGB1(1) SFRGB1(0) Slope Down transition 0 0 0 0 1 Wave form cycle / 16 1 0 Wave form cycle / 8 1 1 Wave form cycle / 4 It is a theoretical value on logic control, and the reaction time of the analog section is not included."Slope time" is the time from a slope start to a slope end. SRRGB1(1) SRRGB1(0) Slope Up transition 0 0 0 0 1 Wave form cycle / 16 1 0 Wave form cycle / 8 1 1 Wave form cycle / 4 It is a theoretical value on logic control, and the reaction time of the analog section is not included."Slope time" is the time from a slope start to a slope end. TRGB1(2) 0 0 0 0 1 1 1 1 TRGB1(1) 0 0 1 1 0 0 1 1 TRGB1(0) 0 1 0 1 0 1 0 1 Wave form cycle 0.131 s 0.52 s 1.05 s 2.10 s 4.19 s 8.39 s 12.6 s 16.8 s Setting time is counted based on the frequency of OSC. The above-mentioned value is a value at the time of Typ (1MHz). When operating by the external clock, input frequency is a value at the time of Typ (250kHz). ＊Refer to "●Use of a RGB wave setup " for the detailed function of each register of this page. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 10/27 2011.04 - Rev.A Technical Note BD2802GU Adress 03h BIT Name Init D7 D6 IR11(6) 0 D5 IR11(5) 0 D4 IR11(4) 0 D3 IR11(3) 0 D2 IR11(2) 0 D1 IR11(1) 0 D0 IR11(0) 0 Adress 04h Name Init D7 D6 IR12(6) 0 D5 IR12(5) 0 D4 IR12(4) 0 D3 IR12(3) 0 D2 IR12(2) 0 D1 IR12(1) 0 D0 IR12(0) 0 IR11(6) IR11(5) IR11(4) IR11(3) 0 0 0 0 0 0 0 0 ・ ・ ・ ・ ・ ・ ・ ・ 1 1 1 1 1 1 1 1 At RGBISETpin 120kΩ connection IR11(2) 0 0 ・ ・ 1 1 IR11(1) 0 0 ・ ・ 1 1 IR11(0) 0 1 ・ ・ 0 1 Current 0 0.2mA 0.2mA step 25.2mA 25.4mA IR12(0) 0 1 ・ ・ 0 1 Current 0 0.2mA 0.2mA step 25.2mA 25.4mA Function 0 - 1 - IR12(6) IR12(5) IR12(4) IR12(3) 0 0 0 0 0 0 0 0 ・ ・ ・ ・ ・ ・ ・ ・ 1 1 1 1 1 1 1 1 At RGBISETpin 120kΩ connection IR12(2) 0 0 ・ ・ 1 1 IR12(1) 0 0 ・ ・ 1 1 BIT Name Init D7 D6 D5 D4 - - D3 PR1(3) 0 D2 PR1(2) 1 D1 PR1(1) 1 D0 PR1(0) 1 Adress 06h 1 - BIT Adress 05h Function 0 - Function 0 PR1(3) 0 0 0 ・ ・ ・ 1 1 1 1 - PR1(2) 0 0 0 ・ ・ ・ 1 1 1 PR1(1) 0 0 1 ・ ・ ・ 0 1 1 PR1(0) 0 1 0 ・ ・ ・ 1 0 1 Wave Pattern1 Pattern2 Pattern3 ・ ・ ・ Pattern14 Pattern15 Pattern16 BIT Name Init D7 D6 IG11(6) 0 D5 IG11(5) 0 D4 IG11(4) 0 D3 IG11(3) 0 D2 IG11(2) 0 D1 IG11(1) 0 D0 IG11(0) 0 Function 0 - 1 - IG11(6) IG11(5) IG11(4) IG11(3) 0 0 0 0 0 0 0 0 ・ ・ ・ ・ ・ ・ ・ ・ 1 1 1 1 1 1 1 1 At RGBISETpin 120kΩ connection IG11(2) 0 0 ・ ・ 1 1 IG11(1) 0 0 ・ ・ 1 1 IG11(0) 0 1 ・ ・ 0 1 Current 0 0.2mA 0.2mA step 25.2mA 25.4mA ＊Refer to "●Use of a RGB wave setup " for the detailed function of each register of this page. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 11/27 2011.04 - Rev.A Technical Note BD2802GU Adress 07h BIT Name Init D7 D6 - - IG12(6) 0 D5 IG12(5) 0 D4 IG12(4) 0 D3 IG12(3) 0 D2 IG12(2) 0 D1 IG12(1) 0 D0 IG12(0) 0 Adress 08h Name Init D7 D6 D5 D4 - - D3 PG1(3) 0 D2 PG1(2) 1 D1 PG1(1) 1 D0 PG1(0) 1 IG12(6) IG12(5) IG12(4) IG12(3) 0 0 0 0 0 0 0 0 ・ ・ ・ ・ ・ ・ ・ ・ 1 1 1 1 1 1 1 1 At RGBISETpin 120kΩ connection IG12(2) 0 0 ・ ・ 1 1 IG12(1) 0 0 ・ ・ 1 1 IG12(0) 0 1 ・ ・ 0 1 Current 0 0.2mA 0.2mA step 25.2mA 25.4mA Function 0 PG1(3) 0 0 0 ・ ・ ・ 1 1 1 1 - PG1(2) 0 0 0 ・ ・ ・ 1 1 1 PG1(1) 0 0 1 ・ ・ ・ 0 1 1 PG1(0) 0 1 0 ・ ・ ・ 1 0 1 Wave Pattern 1 Pattern 2 Pattern 3 ・ ・ ・ Pattern 14 Pattern 15 Pattern 16 BIT Name Init D7 D6 - - IB11(6) 0 D5 IB11(5) 0 D4 IB11(4) 0 D3 IB11(3) 0 D2 IB11(2) 0 D1 IB11(1) 0 D0 IB11(0) 0 Adress 0Ah 1 - BIT Adress 09h Function 0 - Function 0 - 1 - IB11(6) IB11(5) IB11(4) IB11(3) 0 0 0 0 0 0 0 0 ・ ・ ・ ・ ・ ・ ・ ・ 1 1 1 1 1 1 1 1 At RGBISETpin 120kΩ connection IB11(2) 0 0 ・ ・ 1 1 IB11(1) 0 0 ・ ・ 1 1 IB11(0) 0 1 ・ ・ 0 1 Current 0 0.2mA 0.2mA step 25.2mA 25.4mA IB12(0) 0 1 ・ ・ 0 1 Current 0 0.2mA 0.2mA step 25.2mA 25.4mA BIT Name Init D7 D6 - - IB12(6) 0 D5 IB12(5) 0 D4 IB12(4) 0 D3 IB12(3) 0 D2 IB12(2) 0 D1 IB12(1) 0 D0 IB12(0) 0 Function 0 - 1 - IB12(6) IB12(5) IB12(4) IB12(3) 0 0 0 0 0 0 0 0 ・ ・ ・ ・ ・ ・ ・ ・ 1 1 1 1 1 1 1 1 At RGBISETpin 120kΩ connection IB12(2) 0 0 ・ ・ 1 1 IB12(1) 0 0 ・ ・ 1 1 ＊Refer to "●Use of a RGB wave setup " for the detailed function of each register of this page. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 12/27 2011.04 - Rev.A Technical Note BD2802GU Adress 0Bh BIT Name Init D7 D6 D5 D4 - - D3 PB1(3) 0 D2 PB1(2) 1 D1 PB1(1) 1 D0 PB1(0) 1 Adress 0Ch Function 0 PB1(3) 0 0 0 ・ ・ ・ 1 1 1 1 - PB1(2) 0 0 0 ・ ・ ・ 1 1 1 PB1(1) 0 0 1 ・ ・ ・ 0 1 1 PB1(0) 0 1 0 ・ ・ ・ 1 0 1 Wave Pattern1 Pattern2 Pattern3 ・ ・ ・ Pattern14 Pattern15 Pattern16 BIT Name Init D7 SFRGB2(1) 0 D6 SFRGB2(0) 0 D5 SRRGB2(1) 0 D4 SRRGB2(0) 0 D3 - - D2 TRGB2(2) 0 D1 TRGB2(1) 0 D0 TRGB2(0) 0 Function 0 1 SFRGB2(1) SFRGB2(0) Slope Down transition 0 0 0 0 1 Wave form cycle / 16 1 0 Wave form cycle / 8 1 1 Wave form cycle / 4 It is a theoretical value on logic control, and the reaction time of the analog section is not included. "Slope time" is the time from a slope start to a slope end. SRRGB2(1) SRRGB2(0) Slope up transition 0 0 0 0 1 Wave form cycle / 16 1 0 Wave form cycle / 8 1 1 Wave form cycle / 4 It is a theoretical value on logic control, and the reaction time of the analog section is not included. "Slope time" is the time from a slope start to a slope end. TRGB2(2) 0 0 0 0 1 1 1 1 TRGB2(1) 0 0 1 1 0 0 1 1 TRGB2(0) 0 1 0 1 0 1 0 1 Wave form cycle 0.131 s 0.52 s 1.05 s 2.10 s 4.19 s 8.39 s 12.6 s 16.8 s Setting time is counted based on the frequency of OSC. The above-mentioned value is a value at the time of Typ (1MHz). When operating by the external clock, input frequency is a value at the time of Typ (250kHz) ＊Refer to "●Use of a RGB wave setup " for the detailed function of each register of this page. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 13/27 2011.04 - Rev.A Technical Note BD2802GU Adress 0Dh BIT Name Init D7 - - D6 IR21(6) 0 D5 IR21(5) 0 D4 IR21(4) 0 D3 IR21(3) 0 D2 IR21(2) 0 D1 IR21(1) 0 D0 IR21(0) 0 Adress 0Eh Name Init D7 D6 - - IR22(6) 0 D5 IR22(5) 0 D4 IR22(4) 0 D3 IR22(3) 0 D2 IR22(2) 0 D1 IR22(1) 0 D0 IR22(0) 0 IR21(5) IR21(4) IR21(3) 0 0 0 0 0 0 0 0 ・ ・ ・ ・ ・ ・ ・ ・ 1 1 1 1 1 1 1 1 At RGBISETpin 120kΩ connection IR21(2) IR21(1) IR21(0) 0 0 ・ ・ 1 1 0 0 ・ ・ 1 1 0 1 ・ ・ 0 1 Current 0 0.2mA 0.2mA step 25.2mA 25.4mA Function 0 IR22(6) IR22(5) 1 IR22(4) IR22(3) 0 0 0 0 0 0 0 0 ・ ・ ・ ・ ・ ・ ・ ・ 1 1 1 1 1 1 1 1 At RGBISETpin 120kΩ connection IR22(2) IR22(1) IR22(0) 0 0 ・ ・ 1 1 0 0 ・ ・ 1 1 0 1 ・ ・ 0 1 Current 0 0.2mA 0.2mA step 25.2mA 25.4mA BIT Name Init D7 D6 D5 D4 - - D3 PR2(3) 0 D2 PR2(2) 1 D1 PR2(1) 1 D0 PR2(0) 1 Adress 10h IR21(6) 1 - BIT Adress 0Fh Function 0 - Function 0 PR2(3) 0 0 0 ・ ・ ・ 1 1 1 1 - PR2(2) 0 0 0 ・ ・ ・ 1 1 1 PR2(1) 0 0 1 ・ ・ ・ 0 1 1 PR2(0) 0 1 0 ・ ・ ・ 1 0 1 Wave Pattern 1 Pattern 2 Pattern 3 ・ ・ ・ Pattern 14 Pattern 15 Pattern 16 BIT Name Init D7 - - D6 IG21(6) 0 D5 IG21(5) 0 D4 IG21(4) 0 D3 IG21(3) 0 D2 IG21(2) 0 D1 IG21(1) 0 D0 IG21(0) 0 Function 0 IG21(6) IG21(5) 1 IG21(4) IG21(3) 0 0 0 0 0 0 0 0 ・ ・ ・ ・ ・ ・ ・ ・ 1 1 1 1 1 1 1 1 At RGBISETpin 120kΩ connection IG21(2) IG21(1) IG21(0) 0 0 ・ ・ 1 1 0 0 ・ ・ 1 1 0 1 ・ ・ 0 1 Current 0 0.2mA 0.2mA step 25.2mA 25.4mA ＊Refer to "●Use of a RGB wave setup " for the detailed function of each register of this page. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 14/27 2011.04 - Rev.A Technical Note BD2802GU Adress 11h BIT Name Init D7 - - D6 IG22(6) 0 D5 IG22(5) 0 D4 IG22(4) 0 D3 IG22(3) 0 D2 IG22(2) 0 D1 IG22(1) 0 D0 IG22(0) 0 Adress 12h Name Init D7 D6 D5 D4 - - D3 PG2(3) 0 D2 PG2(2) 1 D1 PG2(1) 1 D0 PG2(0) 1 IG22(5) IG22(4) IG22(3) 0 0 0 0 0 0 0 0 ・ ・ ・ ・ ・ ・ ・ ・ 1 1 1 1 1 1 1 1 At RGBISETpin 120kΩ connection IG22(2) IG22(1) IG22(0) 0 0 ・ ・ 1 1 0 0 ・ ・ 1 1 0 1 ・ ・ 0 1 Current 0 0.2mA 0.2mA step 25.2mA 25.4mA Function 0 PG2(3) 0 0 0 ・ ・ ・ 1 1 1 1 - PG2(2) 0 0 0 ・ ・ ・ 1 1 1 PG2(1) 0 0 1 ・ ・ ・ 0 1 1 PG2(0) 0 1 0 ・ ・ ・ 1 0 1 Wave Pattern 1 Pattern 2 Pattern 3 ・ ・ ・ Pattern 14 Pattern 15 Pattern 16 BIT Name Init D7 - - D6 IB21(6) 0 D5 IB21(5) 0 D4 IB21(4) 0 D3 IB21(3) 0 D2 IB21(2) 0 D1 IB21(1) 0 D0 IB21(0) 0 Adress 14h IG22(6) 1 - BIT Adress 13h Function 0 - Function 0 IB21(6) IB21(5) 1 IB21(4) IB21(3) 0 0 0 0 0 0 ・ ・ ・ ・ ・ ・ 1 1 1 1 1 1 At RGBISETpin 120kΩ connection 0 0 ・ ・ 1 1 IB21(2) IB21(1) IB21(0) 0 0 ・ ・ 1 1 0 0 ・ ・ 1 1 0 1 ・ ・ 0 1 Current 0 0.2mA 0.2mA step 25.2mA 25.4mA BIT Name Init D7 - - D6 IB22(6) 0 D5 IB22(5) 0 D4 IB22(4) 0 D3 IB22(3) 0 D2 IB22(2) 0 D1 IB22(1) 0 D0 IB22(0) 0 Function 0 IB22(6) IB22(5) 1 IB22(4) IB22(3) 0 0 0 0 0 0 ・ ・ ・ ・ ・ ・ 1 1 1 1 1 1 At RGBISETpin 120kΩ connection 0 0 ・ ・ 1 1 IB22(2) IB22(1) IB22(0) 0 0 ・ ・ 1 1 0 0 ・ ・ 1 1 0 1 ・ ・ 0 1 Current 0 0.2mA 0.2mA step 25.2mA 25.4mA ＊Refer to "●Use of a RGB wave setup " for the detailed function of each register of this page. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 15/27 2011.04 - Rev.A Technical Note BD2802GU Adress 15h BIT Name Init D7 D6 D5 D4 - - D3 PB2(3) 0 D2 PB2(2) 1 D1 PB2(1) 1 D0 PB2(0) 1 Function PB2(3) 0 0 0 ・ ・ ・ 1 1 1 0 1 - - PB2(2) 0 0 0 ・ ・ ・ 1 1 1 PB2(1) 0 0 1 ・ ・ ・ 0 1 1 PB2(0) 0 1 0 ・ ・ ・ 1 0 1 Wave Pattern 1 Pattern 2 Pattern 3 ・ ・ ・ Pattern 14 Pattern 15 Pattern 16 ＊Refer to "●Use of a RGB wave setup " for the detailed function of each register of this page. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 16/27 2011.04 - Rev.A Technical Note BD2802GU  RGB LED Driver Operation Description - Two drivers “RGB1 (R1LED, G1LED, B1LED)” and “RGB2 (R2LED, G2LED, B2LED)” are mounted. - A slope function is incorporated to control drivers independently. - Refer to  RGB Waveform Setting for more information about output waveform setting. - The LED current can be set via a resistance value (RISET) to be connected to the RGBISET terminal. The maximum current value can be derived from the following expression: ILEDmax [A] = 3.048 / RISET [kΩ] (Typ) However, this setting must be made so that the maximum current value can be less than or equal to 30.48mA. In addition, the RGBISET terminal has an overcurrent protection circuit to prevent the excessive LED current from flowing for low impedance to the ground. - Note that the setting voltage shall be higher than or equal to a saturation voltage (0.2V) in the constant current circuit. When LED Vf is large, the LED destination shall be connected to another step-up circuit. RGB*EN または RGB*EN RGB*OS or RFB*OS Ton (Max:20ms) LED 電流 LED current - The LED destination is fixed before on (RGB*EN=Hi or RGB*OS=Hi). VLED VLED RGB*EN Or RGB*OS RGB*EN Or RGB*OS ●The synchronism of RGB1/RGB2 The period of RGB1 and RGB2 and start, stop timing can be set up independently. When synchronizes RGB1 and RGB2, You must start an internal counter at the same time under the state of resetting. (Internal Counter are prepared for each of RGB1 and RGB2, so You must reset both.) Inside Counter can be reset by carrying out one of following actions. • • • Reset by hard reset (RSTB_IL). (RGB1, RGB2 is reset together.) Reset by soft reset. (RGB1, RGB2 is reset together.) It is written register of the current setup (I1・I2), the slope setup, the period setup and the pattern setup. Internal Counter of RGB1 is reset when it is written between Address=0Bh from 02h. Internal Counter of RGB2 is reset when it is written between Address=15h from 0Ch. Counter is reset as to overwriting the same value. Note) Internal Counter isn't reset if write RGB1EN =L and RGB2EN =L. (Address=01h). When it write RGB1EN=L (RGB2EN=L), inside Counter is held, and IC will operate from the held state at next restart. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 17/27 2011.04 - Rev.A Technical Note BD2802GU ●RGB Waveform Setting Various kinds of RGB control can be implemented by designating waveform cycles, waveform patterns, current settings 1, 2 and rising/falling slope times. To activate a RGB waveform, a continuous operation via RGB*EN or a single-shot operation via RGB*OS can be selected. In addition, when control via the external terminal RGB*CNT is enabled via RGB*MEL, the corresponding LED can be lit in synchronization with the external signal. 1. Waveform cycle  A single cycle time is set for a waveform pattern.  This setting can be made independently for RGB1 and RGB2. 2. Waveform pattern  A pattern in a waveform cycle is set.  Sixteen types of waveform patterns can be set in units of waveform patterns.  For concrete waveform patterns, refer to the timing diagram shown on the next page. 3. Current settings 1 and 2 (I1, I2)  Two currents in a waveform pattern are set.  When the maximum current value is 25.4mA, it is possible to set the current ranging from 0 to 25.4mA with an increment of 0.2mA (128 steps).  The polarity of a waveform is determined by the greater-than/ less-than relationship in the current setting.  This setting can be made in units of terminals. 4. Rising/falling slope time  A current change time during switching between current settings 1 and 2 is set.  A time per step (0.2mA) is calculated based on a difference between the currents selected in current settings 1, 2 and a setting slope time.  For this reason, a time per step (0.2mA) is short when a difference between setting currents I1 and I2 is large. In contrast, it is long when a difference between setting currents I1 and I2 is small.  Regardless of current settings 1 and 2, a rising slope time applies at current increase and a falling slope time applies at current decrease. For concrete waveform images, refer to the timing diagram shown on the next page. 5. External terminal synchronization control When control via the external terminal RGB*CNT is enabled via RGB*MEL, lighting is enabled if the input external signal goes “H.” In contrast, it is disabled if the external input signal goes “L.” In this way, synchronization with the external signal is enabled so that LED can be blinked in conjunction with a ringing tone (a melody signaling a ringtone). A RGB thin line indicates an image where external terminal control does not take place. Waveform cycle R*LED G*LED B*LED RGB*CNT RGB*MEL External terminal control is enabled. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. Remains “Enabled” with RGB*MEL=1 and RGB*CNT=H 18/27 External terminal control is disabled. 2011.04 - Rev.A Technical Note BD2802GU Wave cycle Register data Wave pattern 1 (00h) Wave pattern2 (01h) Wave pattern 3 (02h) Wave pattern 4 (03h) Wave pattern 5 (04h) Wave pattern 6 (05h) Wave pattern 7 (06h) Wave pattern 8 (07h) Wave pattern 9 (08h) Wave pattern 10 (09h) Wave pattern 11 (0Ah) Wave pattern 12 (0Bh) Wave pattern 13 (0Ch) Wave pattern 14 (0Dh) Wave pattern 15 (0Eh) Wave pattern 16 (0Fh) I1 I2 I1 I2 I1 I2 I1 I2 I1 I2 I1 I2 I1 I2 I1 I1 I2 I1 I1 I1 I2 I2 I1 I1 I2 I2 I1 I1 I1 I2 I2 I1 I1 I2 I1 I1 I1 I1 I2 I2 I1 I2 I1 I1 I2 I1 I2 （ex）The image of current change of Wave pattern 11 Slope Down transition Current 2(I2) Slope uptransition Current 1(I1) RGB wave setting timing diagram 6. Clock I/O A reference clock I/O function is mounted in this IC chip. When two IC chips are used to extend an illumination capability, clock supply to the other RGB LED driver can be accomplished for synchronization with this LSI chip. This setting can be made via the register. Clock output can be made with CLKEN=1 and CLKMD=1. Register CLKIO terminal state CLKEN CLKMD 0 0/1 Input 1 www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 0 1 Input Output 19/27 Clock reception Does not receive external clocks. Operates on external clocks. - 2011.04 - Rev.A Technical Note BD2802GU ●When two BD2802GU drivers are used and the clock is shared by CLKIO: Because a sequence is already programmed within an IC chip for RGB falling, “Enable” shall be set to “OFF” and clock supply shall be continued for at least three clocks so that operations can be performed using external clocks. Enable マスター側 Master enabled Slave enabled Enable スレーブ側 (min=0ms) min=スレーブ側入力クロックの min = slave input clock (3 clocks) 3 クロック分 (マスター側のクロックを使用している場合は min=15μs) (For master clocks in use: min = 15 s) Master: Chip using CLKIO as output Slave: Chip using CLKIO as input *Even in independent slave mode, its setting “Enable” shall be reset to “OFF” and then clock supply must be continued for 3 clocks or more. Clock I/O switching shall be avoided during RGB operation. Enable: CLKEN, RGB1EN, RGB2EN, RGB1OS, RGB2OS - Setting example Master side (clock output side) RGB waveform setting  Slave side (clock input side) RGB waveform setting  Master side Clock output setting CLKEN=1, CLKMD=1 … Performs clock output.  Slave side Clock input setting CLKEN=1, CLKMD=0 … Allows clock reception.  Master side RGB lighting   This duration shall be short as much as possible.  Slave side RGB lighting www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 20/27 2011.04 - Rev.A Technical Note BD2802GU 7. RGB waveform setting examples 1】ノーマル [Example 1] Normal operation 【例 動作 波形周期 Waveform cycle 4】16Hz [Example 4] 16Hz 【例 動作 operation R*LED R*LED G*LED G*LED B*LED B*LED RGB*EN=1 RGB*EN=0 RGB*EN=1 Selecting a waveform pattern 8 causes a continuous normal operation to take place through the setting current 1. 2】ブリンク動作 【例 [Example 2] Blinking 波形周期 Waveform cycle 5】4 連単発 【例 [Example 5] Continuous lighting of four LEDs R*LED G*LED G*LED B*LED B*LED RGB*EN=0 This example shows that lighting occurs continuously in the order of white, red, red and red. To achieve this, waveform patterns 16, 1 and RGB*OS single cycle operation need to be combined. 波形周期 Waveform cycle 6】7 6] 【例 色変色スロープ [Example 7-color change slope operation R*LED R*LED G*LED G*LED B*LED B*LED RGB*EN=1 RGB*EN=０ RGB*EN=1 When a rising/falling slope time is longer than the setting made in example 2, a continuous color change is made by slope operation. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 波形周期 Waveform cycle RGB*OS=1 Setting a rising/falling slope time to “0” causes blinking to take place. Phase switching takes place via the setting currents of R and G. 【例３】スロープ動作 [Example 3] Slope operation RGB*EN=0 Combining the settings of a waveform pattern 11 and a waveform cycle 131ms causes blinking at a rate of 15.3Hz (approx. 16Hz). R*LED RGB*EN=1 波形周期 Waveform cycle 波形周期 Waveform cycle RGB*EN=０ R, G and B waveform patterns are set in a way that any of R, G and B changes constantly. 21/27 2011.04 - Rev.A Technical Note BD2802GU 8. RGB slope waveforms - Example of waveform at activation Current setting: I1 < I2 (R G B*EN = 1) I2 I1 (O FF) (R G B*O S = 1) R G B*EN or R G B*O S = 1 R G B*EN = 0 Current setting: I1 > I2 I1 (RG B*EN = 1) I2 (O FF) (R G B*O S = 1) R G B*EN or R G B*O S = 1 R G B*EN = 0 - Current difference in each channel (example) I2 ( A ) I2 ( B ) Transition takes place in units of steps but the time per step is set based on internal calculation so that the slope arrival time is quasi-equal. I1 (B ) I1 ( A ) Slope duration 9. Setting change in slope duration A slope operation is performed by an internal sequencer. When an attempt is made to change the setting in a slope duration, the active slope operation is reset and a newly set slope operation is restarted. In this case, however, LED lighting stops for a maximum of 16.4ms (OSC frequency=typ) for synchronization with the internal clock until the operation is restarted. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 22/27 2011.04 - Rev.A Technical Note BD2802GU ●Description of other operations 1. Reset There are two types of reset: software reset and hardware reset. (1) Software reset - Setting the register (SFTRST) to “1” causes all the registers to be initialized. - The registers subject to software reset automatically return to zero (Auto Return 0). (2) Hardware reset - Changing the RESETB terminal setting from “H” to “L” causes a state subject to hardware reset. - Attempting hardware reset causes the states of all registers and output terminals to be initialized to their initial values, so that address reception is entirely stopped. - Attempting reset in the hardware reset state causes the RESETB terminal state to change from “L” to “H” and vice versa. - The RESETB terminal is provided with a filter circuit and a duration of 5µs or less with the terminal set to “L” is not recognized as hardware reset. (3) Reset sequence - When hardware reset is attempted during software reset, software reset is already cleared when hardware reset is cleared (because the software reset initial value is 0). 2. Thermal shutdown The thermal shutdown is effective for LED and OSC portions. The thermal shutdown function is activated when the detected temperature is approx. 195C. The detected temperature has a hysteresis and the detection cancel temperature is approx. 175C (reference value in design). 3. I/O portion While the RESETB terminal is in “L” state, no input signal is propagated to the IC logic portion because SDA and SCL input buffer operations are all stopped. When RESETB=L, output is fixed at “H.” Level shifter SCL (SDA) Logic EN 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. 4. Power on/off sequence Voltage shall be applied as follows at driver activation. When a delay element is connected to a VIO voltage source and a reset cancel signal is input to the RESETB terminal, special care should be taken to the rising time of VIO voltage to delay the RESETB signal without fail. VBAT T VBATOFF VIO T R STB=m in 0.1m s T R ST=m in 0.1m s RESETB T AC SS=m in 0.1m s control レRegister ジ ス タ制 御 Register 不 control 可 disabled Register 可 control 能 enabled Register 不 control 可 disabled 5. Terminating the unused terminals Be sure to set the test terminals and unused terminals as summarized in the following table.In addition, refer to the preceding equivalent circuit and terminate the above terminals in a way that no problem occurs during actual use. T1, T2, T3, T4 Test input terminals. Short-circuit these terminals to GND. Short-circuit these terminals to GND. LED terminals not to be used In this case, don’t set the registers related to LEDs not to be used. RGB1CNT, RGB2CNT Short-circuit these terminals to GND.(Built-in pull-down resistance) CLKIO Short-circuit this terminal to GND.(Built-in pull-down resistance) ADDSEL Be sure to short-circuit this terminal to VBAT or GND. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 23/27 2011.04 - Rev.A Technical Note BD2802GU ●PCB pattern of the Power dissipation measuring board 1st layer(component) 2nd layer 3rd layer 4th layer 5th layer 6th layer 7th layer www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 8th layer (solder) 24/27 2011.04 - Rev.A Technical Note BD2802GU ●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) 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. (11) About the rush current Because the rush current flows momentarily for internal logic instability caused by a power-on sequence or delay, special care should be taken to the power supply coupling capacity, power supply, ground pattern wiring width and wiring. (12) About descriptions given in this document Though the function description and application node are design documents prepared for application design, we don’t take liability for descriptions given in these documents. Be sure to decide applications after thoroughly investigating and evaluating the external devices as well as this BS2802GU LED driver. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 25/27 2011.04 - Rev.A Technical Note BD2802GU ●Power Dissipation (On the ROHM’s standard board) 1.6 Power Dissipation Pd （W) 1.4 1250mW 1.2 Information of the ROHM’s standard board Material : glass-epoxy Size : 50mm×58mm×1.75mm (8Layer) Pattern of the board: Refer to it that goes later. 1.0 0.8 0.6 0.4 0.2 0.0 0 25 50 75 100 125 150 Ta（℃） www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 26/27 2011.04 - Rev.A BD2802GU Technical Note ●Ordering part number B D 2 Part No. 8 0 2 G Part No. 2802 U - Package GU : VCSP85H2 E 2 Packaging and forming specification E2: Embossed tape and reel VCSP85H2 (BD2802GU) 2.8±0.1 1.0MAX 1PIN MARK 0.25± 0.1 2.8± 0.1 (φ0.15)INDEX POST B 1 0.4±0.1 E2 The direction is the 1pin of product is at the upper left when you hold ( reel on the left hand and you pull out the tape on the right hand ) 0.4± 0.1 A E D C B A 3000pcs P=0.5 × 4 0.08 S 0.05 A B Embossed carrier tape Quantity Direction of feed S 24- φ 0.30±0.05 Tape 2 3 4 5 P=0.5×4 www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 1pin (Unit : mm) Reel 27/27 Direction of feed ∗ Order quantity needs to be multiple of the minimum quantity. 2011.04 - Rev.A Datasheet Notice Precaution on using ROHM Products 1. Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment, OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you (Note 1) , transport intend to use our Products in devices requiring extremely high reliability (such as medical equipment equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance. Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific Applications. (Note1) Medical Equipment Classification of the Specific Applications JAPAN USA EU CHINA CLASSⅢ CLASSⅡb CLASSⅢ CLASSⅢ CLASSⅣ CLASSⅢ 2. ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which a failure or malfunction of our Products may cause. The following are examples of safety measures: [a] Installation of protection circuits or other protective devices to improve system safety [b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. Our Products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any special or extraordinary environments or conditions. If you intend to use our Products under any special or extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents [b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust [c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2 [d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves [e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items [f] Sealing or coating our Products with resin or other coating materials [g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] Use of the Products in places subject to dew condensation 4. The Products are not subject to radiation-proof design. 5. Please verify and confirm characteristics of the final or mounted products in using the Products. 6. In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied, confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect product performance and reliability. 7. De-rate Power Dissipation (Pd) depending on Ambient temperature (Ta). When used in sealed area, confirm the actual ambient temperature. 8. Confirm that operation temperature is within the specified range described in the product specification. 9. ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in this document. Precaution for Mounting / Circuit board design 1. When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product performance and reliability. 2. In principle, the reflow soldering method must be used; if flow soldering method is preferred, please consult with the ROHM representative in advance. For details, please refer to ROHM Mounting specification Notice - GE © 2014 ROHM Co., Ltd. All rights reserved. Rev.002 Datasheet Precautions Regarding Application Examples and External Circuits 1. If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the characteristics of the Products and external components, including transient characteristics, as well as static characteristics. 2. You agree that application notes, reference designs, and associated data and information contained in this document are presented only as guidance for Products use. Therefore, in case you use such information, you are solely responsible for it and you must exercise your own independent verification and judgment in the use of such information contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. Precaution for Electrostatic This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron, isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control). Precaution for Storage / Transportation 1. Product performance and soldered connections may deteriorate if the Products are stored in the places where: [a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2 [b] the temperature or humidity exceeds those recommended by ROHM [c] the Products are exposed to direct sunshine or condensation [d] the Products are exposed to high Electrostatic 2. Even under ROHM recommended storage condition, solderability of products out of recommended storage time period may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is exceeding the recommended storage time period. 3. Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4. Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of which storage time is exceeding the recommended storage time period. Precaution for Product Label QR code printed on ROHM Products label is for ROHM’s internal use only. Precaution for Disposition When disposing Products please dispose them properly using an authorized industry waste company. Precaution for Foreign Exchange and Foreign Trade act Since our Products might fall under controlled goods prescribed by the applicable foreign exchange and foreign trade act, please consult with ROHM representative in case of export. Precaution Regarding Intellectual Property Rights 1. All information and data including but not limited to application example contained in this document is for reference only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data. ROHM shall not be in any way responsible or liable for infringement of any intellectual property rights or other damages arising from use of such information or data.: 2. No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any third parties with respect to the information contained in this document. Other Precaution 1. This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM. 2. The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of ROHM. 3. In no event shall you use in any way whatsoever the Products and the related technical information contained in the Products or this document for any military purposes, including but not limited to, the development of mass-destruction weapons. 4. The proper names of companies or products described in this document are trademarks or registered trademarks of ROHM, its affiliated companies or third parties. Notice - GE © 2014 ROHM Co., Ltd. All rights reserved. Rev.002 Datasheet General Precaution 1. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents. ROHM shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny ROHM’s Products against warning, caution or note contained in this document. 2. All information contained in this docume nt is current as of the issuing date and subj ect to change without any prior notice. Before purchasing or using ROHM’s Products, please confirm the la test information with a ROHM sale s representative. 3. The information contained in this doc ument is provi ded on an “as is” basis and ROHM does not warrant that all information contained in this document is accurate an d/or error-free. ROHM shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information. Notice – WE © 2014 ROHM Co., Ltd. All rights reserved. Rev.001