AS3644 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.
AS3644 Key Features
- Total flash driver solution only 11mm2 -High efficiency 4MHz fixed frequency DCDC Boost
- Flash LED(s) cathode connected to ground: Improved thermal performance (ground = heat sink) Simplified PCB layout
- Adjustable Flash Timer 30ms to 480ms in 30ms steps
- Flash, Torch, Assist and Indicator Mode -Protection functions