SAMHOP Microelectronics Corp.
WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION
BLOCK DIAGRAM
Current BIAS
EN/CTRL
Pulse
Control
Voltage
Reference
Driver 1
Output Step
Control
LED1
LED2
LED3
LED4
Driver 2
Driver 3
Driver 4
PIN DESCRIPTION (MSOP-8)
Pin NO.
1
I/O
-
Pin Name
PGND
Power ground.
Function Description
2
I
EN/CTRL
This pin combined enable and output sink current
programming function. Pulling this pin constantly high will
enable the device, Pulsing this pin constantly to GND will
disable the device, To pulsig this pin low will decrease or
increase the output Sink current, Please refer to the
application section for further informaiton.
Power supply
Ground
3
4
-
-
V
DD
GND
5~8
O
LED1~LED4
Output pins, connect to LED's cathode.
NOTE: Power ground and Ground pin must be short on PCB Board.
Page 3
V.1.0 July 12,2007
SAMHOP [ SAMHOP MICROELECTRONICS CORP. ]
