AS3644
AS3644 is Ultra Small Low Cost 320mA Inductive manufactured by austriamicrosystems.
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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...
