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AS3676 Lighting Management Unit

Flexible lighting management unit with charge pump, DC-DC, 13 current sinks, ALS, DLS, audio sync and LDO


  • High-efficiency step-up DC-DC converter
  • High-efficiency high-power charge pump
  • 13 fully programmable current sinks
  • Dynamic luminance scaling (DLS) support
  • Ambient light sensor (ALS) input


  • Programmble up to 26V/50mA for white LEDs
  • Low voltage and high voltage current sinks
  • Improved LCD backlight control by DLS
  • Internal hardware ALS processing

Product parameters

# of Current Sinks [HV] 3
- [LV] 10
CP [Max. I (mA)] 300
DC-DC [Max. I (mA)] Controller
Max. Vled [V] Controller
Features [LDOs (#)] 1
- [Auto ALS] Yes
- [DLS] Yes
- [RGB Pattern] Yes
- [Dimming] Yes
- [Auto-In] Yes
- [LED Test] Yes
Flash [Support] Yes
- [Max. I (mA)] 300
Package WL-CSP-30 (3x2.5)-0.5

General Description

The AS3676 is a highly-integrated CMOS power and lighting management unit for mobile phones. The AS3676 incorporates one DC-DC step-up converter for white backlight LEDs, one high-power charge pump, 13 current sinks, LED in-circuit function test, a charge pump serial interface, and control logic all onto a single device.

This product suits for the following applications:

  • Mobile phones
  • Portable DVD / TV player
  • Portable learning toys
  • Portable navigation devices
  • Portable medical consumer devices


Name Type Description Language Software Setup English Software Eval SW 1v10 English

Technical Documents

Name Type Description Version Language
AS3676_AN000114_1-00.pdf Application Note Tablet applications 1-00 English
AS3676-77_AN000119_1-00.pdf Application Note 9 LED series configuration 1-00 English
AS34xx_AS36xx_MobileBacklight_AN000107_1-00.pdf Application Note Selection Guide 1-00 English
AS3676_BD000273_1-00.png Block Diagram AS3676 Block Diagram 1-00 English
AS3676_DS000158_1-00.pdf Datasheet Document version 1v1-4 1-00 English
AS3676_UG000190_1-00.pdf User Guide Demo board 1-00 English

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