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AS3649 - 2500mA High Current LED Flash Driver

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.

Key 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 Details

Part number AS3649
Manufacturer ams
File Size 3.13 MB
Description 2500mA High Current LED Flash Driver
Datasheet download datasheet AS3649 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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.