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AS3677 Lighting Management Unit

Flexible CMOS power and lighting management unit


  • High-efficiency DC-DC step-up converter
  • 6 fully programmable current sinks
  • Ambient light sensor (ALS) input
  • Dual dynamic luminance scaling (DLS) support


  • Up to 25V/ 50mA for white LEDs
  • 3 low voltage and 3 high voltage current sinks manage the light due to ambient light without application processor involved
  • DLS improves backlight operation

Product parameters

# of Current Sinks [HV] 3
- [LV] 3
CP [Max. I (mA)] 50
DC-DC [Max. I (mA)] 50
Max. Vled [V] 25
Features [LDOs (#)] 1
- [Auto ALS] Yes
- [DLS] 2x
- [RGB Pattern] Yes
- [Dimming] Yes
- [Auto-In]
- [LED Test] Yes
Flash [Support]
- [Max. I (mA)]
Package WLCSP-25 (2.3x2.3)-0.4

General Description

The AS3677 is a highly-integrated CMOS power and lighting management unit for mobile phones. The AS3677 incorporates one DC-DC step-up converter for white backlight LEDs, one analog-to-digital converter, six current sinks, LED in-circuit function test, an I2C serial interface, and control logic all onto a single device. It includes a charge pump to control e.g. an RGB together with an internal pattern generator for smooth blinking effects.

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
AS3677_SW000144_1-00.crf Software English Software Eval SW 1v40 English

Technical Documents

Name Type Description Version Language
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
AS3677_AN000105_2-00.pdf Application Note User scenarios 2V0 2-00 English
AS3677_BD000274_1-00.png Block Diagram AS3677 Block Diagram 1-00 English
AS3677_DS000223_2-00.pdf Datasheet Document version 1-32 2-00 English
AS11xx_AS13xx_AS17xx_AS349x_AS36xx_EN000160_1-00.pdf EoL Notification AS11xx_AS13xx_AS17xx_AS349x_AS36xx (issued 2018-Oct) 1-00 English

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