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AS3649 - 2500mA High Current LED Flash Driver

Datasheet Summary

Description

The AS3649 is an inductive high efficient DCDC step up converter with two current sources.

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 2x1000mA(2x1250mA with current boost) or 2000mA and automatic load balancing for two LEDs.
  • Automatic current adjustment for low battery voltage.
  • PWM operation for lower output current for reliable light output of the LED; can run at 31.5kHz to avoid audible noise.
  • Protection functions: Automatic Flash Timeout time.

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Datasheet preview – AS3649

Datasheet Details

Part number AS3649
Manufacturer ams
File Size 3.13 MB
Description 2500mA High Current LED Flash Driver
Datasheet download datasheet AS3649 Datasheet
Additional preview pages of the AS3649 datasheet.

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Full PDF Text Transcription

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AS3649 2500mA High Current LED Flash Driver 1 General Description The AS3649 is an inductive high efficient DCDC step up converter with two current sources. 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 sources can operate in flash / torch or video light modes. The AS3649 includes flash timeout, overvoltage, overtemperature, undervoltage and LED short/open 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.
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