September 2018 V1.3
200mA 1-Wire Configurable Front Flash LED Driver
with Ultra Small Package
Front Flash LED Driving
200mA Maximum Flash Current
tia GENERAL DESCRIPTION
AW3640 is a low voltage-drop current sink LED
driver, which supports both Torch and Flash modes.
The current-regulation sink integrated in the chip
16 Steps Current 1-wire Pulse Configurable,
n make the LED current capable of keeping constant
when input voltage, LED forward voltage or
LED Current Accuracy: ±15%
Low Dropout Voltage: 65mV@200mA (Typ.)
Efficiency: 94% (VIN=3.6V, VF=3.4V)
Shutdown Current: <0.1μA
Ultra Small 1.5×1.0×0.55mm3 DFN-6L Package
temperature changing. The LED current can be
adjusted among 16 steps by sending 1-wire pulse
e into the EN pin, and the maximum value is 200mA.
AW3640 is available in an ultra small 1.5mm×
d 1.0mm×0.55mm DFN-6L package. And only one
i multi-layer ceramic capacitor is needed for the
f peripheral of the solution.
nIn shut down mode, AW3640 turns off all internal
circuit and the consumption is less than 0.1μA.
Front Camera Flash
o The device requires 2.8V~5.5V input voltage range
and an operating temperature range of -40~85℃.
C LED Torch Mode
TYPICAL APPLICATION CIRCUIT
Figure 1 AW3640 Application Circuit for Single LED
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