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
Symbol
1250 (Note1)
mW
-40 ～ +85
℃
Tstg
Storage Temperature Range
V
Topr
Operating Temperature Range
7
Pd
Power Dissipation
Unit
VMAX
Maximum Applied voltage
Limits
-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
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© 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
●Block Diagram / Application Circuit example
VBAT
VBAT2
VBAT1
VBAT
VREF
1µF/10V
R1LED
Slope
Control
RESETB
G1LED
(RGB1)
VIO
1µF/10V
B1LED
RGB1
R2LED
SCL
2
Level
I C interface
Shift
Digital Control
Slope
Control
I/O
G2LED
(RGB2)
SDA
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
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© 2011 ROHM Co., Ltd. All rights reserved.
CLKIO
SCL
SDA
RGB2CNT
VIO
RESETB
T2
2
3
4
5
3/27
2011.04 - Rev.A
