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AS3644 - Ultra Small Low Cost 320mA Inductive

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.

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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Datasheet Details

Part number AS3644
Manufacturer austriamicrosystems
File Size 1.45 MB
Description Ultra Small Low Cost 320mA Inductive
Datasheet download datasheet AS3644 Datasheet

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Full PDF Text Transcription for AS3644 (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for AS3644. For precise diagrams, tables, and layout, please refer to the original PDF.

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 ...

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tion 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 components and allowing in-circuit