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AS3689 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 15 current sinks
  • PWM generation and LED pattern generator


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

Product parameters

# of Current Sinks (HV) 3
# of Current Sinks (LV) 12
CP (max. l) [mA] 400
DC-DC (max. l) [mA] Controller
Max. Vled [V] Controller
# of LDOs 1
Auto ALS
RGB Pattern Yes
Dimming Yes
LED Test Yes
Flash Support Yes
Flash (max. l) [mA] 150
Package WL-CSP36 (3x3)-0.5

General description

The AS3689 is a highly-integrated CMOS power and lighting management unit to supply power to LCD and camera modules in mobile telephones, and other 1-cell Li+ or 3-cell NiMH powered devices. 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.

Not Recommended for New Designs
ams-OSRAM AG is discontinuing production of this device. Final lifetime buy order must be placed by June 30, 2021. Please contact your local sales representative for further information.

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 1.0.2 English


Type Description Language
EoL Notification AS1xxx, AS25xx, AS3xxx, AS73211, AS89020, SL900A, TMD4704 (issued 2020-Dec) English

Other information

Type Description Language
Block Diagram AS3689 Block Diagram English
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