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AS3647B - 1600mA High Current LED Flash Driver

Download the AS3647B datasheet PDF. This datasheet also covers the AS3647 variant, as both devices belong to the same 1600ma high current led flash driver family and are provided as variant models within a single manufacturer datasheet.

General Description

The AS3647/47B 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.

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 1600mA.
  • 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.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (AS3647-austriamicrosystems.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number AS3647B
Manufacturer austriamicrosystems
File Size 3.54 MB
Description 1600mA High Current LED Flash Driver
Datasheet download datasheet AS3647B Datasheet

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Other Datasheets by austriamicrosystems

Part Number Description
AS3647 1600mA High Current LED Flash Driver
AS3642 Ultra Small 500mA Inductive White LED Flash Driver
AS3643 1300mA High Current LED Flash Driver
AS3644 Ultra Small Low Cost 320mA Inductive
AS3648 2000mA High Current LED Flash Driver

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.

View original datasheet text
valid Datasheet AS3647/47B 1600mA High Current LED Flash Driver 1 General Description The AS3647/47B 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 AS3647/47B 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.