valid Datasheet AS3644 Ultra Small Low Cost 320mA Inductive White LED Flash Driver 1 General Description The AS3644 is an inductive high efficient DCDC step up converter driving a current source.
The DCDC step up converter operates at a fixed frequency of 4MHz and includes soft startup to allow easy integration into noise sensitive RF systems.
The current source operates in flash/torch/assist (video/autofocus) mode.
The AS3644 includes flash timer, overvoltage, overtemperature, undervoltage and LED short circuit protection functions.
The AS3644 is able to detect a broken coil.
Together with the LED short and open detection the AS3644 can be used to verify the connection to its external co...

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