AS3643 Datasheet PDF - austriamicrosystems 1300mA High Current LED Flash Driver Specs

AS3643 - 1300mA High Current LED Flash Driver

Datasheet Summary

Description

The AS3643 is an inductive high efficient DCDC step up converter with two current sinks.

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.

Features

High efficiency 4MHz fixed frequency DCDC Boost converter with soft start allows small coils - Stable even in coil current limit.
LED current adjustable up to 1300mA.
Automatic current adjustment for low battery voltage.
PWM operation for lower output current for reliable light output of the LED; running at 31.25kHz to avoid audible noise.
Protection functions: Automatic Flash Timeout timer to protect the LED(s) Overvoltage and undervoltage Protection Overtemperature Pr.

Datasheet Details

Part number	AS3643
Manufacturer	austriamicrosystems
File Size	3.47 MB
Description	1300mA High Current LED Flash Driver
Datasheet	AS3643 Datasheet
Additional preview pages of the AS3643 datasheet.

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Full PDF Text Transcription

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valid Datasheet AS3643 1300mA High Current LED Flash Driver 1 General Description The AS3643 is an inductive high efficient DCDC step up converter with two current sinks. 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 two current sinks can operate in flash / torch / assist (=video) light modes. The AS3643 includes flash timeout, overvoltage, overtemperature, undervoltage and LED short circuit protection functions. A TXMASK/TORCH function reduces the flash current in case of parallel operation to the RF power amplifier and avoids a system shutdown. Alternatively this pin can be used to directly operate the torch light directly.

Published: Feb 18, 2015 |