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AS3688 Lighting Management Unit

Flexible lighting management, charge pump, DC-DC step-up, current sink, ADC, LDO


  • High-efficiency DC-DC step-up converter
  • High-efficiency high-power charge pump
  • Supports up to 12 current sinks
  • PWM generation and LED pattern generator


  • Up to 25V/50mA for white LEDs
  • CP output current up to 400mA / 900mA pulsed
  • 2 high voltage current sinks
  • Autonomous logarithmic up/down dimming

Product parameters

# of Current Sinks (HV) 2
# of Current Sinks (LV) 7
CP (max. l) [mA] 900
DC-DC (max. l) [mA] Controller
Max. Vled [V] Controller
# of LDOs 2
Auto ALS
RGB Pattern Yes
Dimming Yes
LED Test Yes
Flash Support Yes
Flash (max. l) [(mA] 900
Package QFN-32 (5x5)-0.5

General description

The AS3688 is a highly-integrated CMOS power and lighting management unit to supply power to LCD and camera modules in mobile phones. The device incorporates one low power, low-dropout regulator (LDO), one DC-DC step-up converter for white backlight LEDs, one high-power charge pump for camera flash LEDs, support for up to 11 current sinks, a two-wire 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

Technical documents

Type Description Language
Datasheet Document version 1.1.1 English

Other information

Type Description Language
Block Diagram AS3688 Block Diagram English
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