• Part: AS3647B
  • Manufacturer: austriamicrosystems
  • Size: 3.54 MB
Download AS3647B Datasheet PDF
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AS3647B 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 Overt
  • I2C Interface with automatic shutdown
  • 5V constant voltage mode operation

Related austriamicrosystems Datasheets

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

AS3647B 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.