SM8134A Datasheet, PDF (17/19 Pages) Nippon Precision Circuits Inc – White LED Driver IC

SM8134A
TYPICAL APPLICATION CIRCUIT
In circuits where the SM8134A logic-level inputs would become open circuit (floating) when the microcontrol-
ler supply stops, pull-down resistors should be connected to each logic-level signal input.
2.7 to 4.6V
C4
4.7µF
VIN
C1
1.0µF
C1M C1P
C2
1.0µF
C2M C2P
Charge pump
1/ 1.5
Microcontroller
Pull down
SCK
SDA
EN
Thermal
shut down
UVLO
Output voltage
control
Control
logic
Current
control
&
Current
detect
GND PGND
VOUT
C3
4.7µF
Back Light
Max 30mA 4ch
DIN1
DIN2
DIN3
DIN4
DIN5
Flash
Max 150mA
Note. If the driving LEDs are less than 5 pcs, the unused DIN pins should be connected to GND.
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