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AS3685B LED Flash Driver

1.0A single LED flash driver


  • Capacitive charge pump
  • Small chip-scale package
  • Supports flash, torch and indicator modes


  • Low system cost
  • Small system size
  • Highly flexible

Product parameters

Topology Capacitive
DC-DC Frequency [MHz]
Performance (ILed Max.) [mA] 1000
- [Vout Max.] 5.5
LED Channels [Curr. Sinks] 1
- [Curr. Source] Low side
- [Flash LEDs] 1
- [Indicator LED] Flash LED
Interfaces [I²C]
- [Enable] Yes
Safety Features [TimeOut] Yes
- [TXMask] Yes
Package CS-WLP-12 (2x1.5) \ DFN-10 (3x3)

General Description

The AS3685B is low noise 1A single LED flash driver. Its capacitive charge pump operates in 1:1, 1:1.5 and 1:2 modes with automatic mode switching. It supports flash/torch and indicator mode for the flash LED. Additionally the AS3685B limits the flash time automatically to protect the flash LED. Through the easy configurable direct-control interface three current levels are programmable.

This product suits for the following applications:

  • Single LED flash solution for mobile phones

Technical Documents

Name Type Description Version Language
AS3685_BD000268_1-00.png Block Diagram AS3685 Block Diagram 1-00 English
AS3685_DS000336_2-00.pdf Datasheet Document version 2-23; AS3685A/B 2-00 English