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AS3644 Datasheet Ultra Small Low Cost 320ma Inductive

Manufacturer: austriamicrosystems

Overview: valid Datasheet AS3644 Ultra Small Low Cost 320mA Inductive White LED Flash Driver 1.

Datasheet Details

Part number AS3644
Manufacturer austriamicrosystems
File Size 1.45 MB
Description Ultra Small Low Cost 320mA Inductive
Datasheet AS3644-austriamicrosystems.pdf

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.

Key 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: 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 function.

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AS3644 Distributor