AS3644 Datasheet - austriamicrosystems

AS3644 Ultra Small Low Cost 320mA Inductive

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/au.

AS3644 Features

* Total flash driver solution only 11mm2

* High efficiency 4MHz fixed frequency DCDC Boost converter with soft start allows small coils

* LED currents 260mA to 320mA flash current (20mA steps) 51.6mA or 72.3mA Assist light (=torch) current

* Flash LED(s) cathode connected to ground:

AS3644-austriamicrosystems.pdf