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AS3492 Lighting Management Unit

Highly efficient 2 to 10 LEDs backlight driver with PWM input


  • 2 MHz DC-DC boost converter
  • 5 current sources up to 25mA
  • Excellent LED current output ripple <500μA


  • Small 4.7μH external coil
  • Very high system efficiency of 86%
  • High side current source to simplify layout and thermal management of the LEDs

Product parameters

# of Current Sinks [HV] 5
- [LV] 0
CP [Max. I (mA)]
DC-DC [Max. I (mA)] 100
Max. Vled [V] 7.8
Features [LDOs (#)]
- [Auto ALS]
- [DLS] Yes (2x)
- [RGB Pattern]
- [Dimming]
- [Auto-In]
- [LED Test] Yes
Flash [Support]
- [Max. I (mA)]
Package WL-CSP12 (1.7x1.4)-0.5

General Description

The AS3492 is an inductive highly efficient DC-DC boost converter. The DC-DC converter operates at a fixed frequency of 2MHz and includes soft startup to allow easy integration into noise sensitive RF systems. A predictable startup is guaranteed even with very low duty cycle PWM input signals. The output of the DC-DC converter is used for five current sources connected to up to 10 LEDs.

This product suits for the following applications:

  • Smart watches
  • Mobile phones
  • Digital cameras
  • PNDs and PMPs


Title Category Headline Buy
AS3492DemoKit Application Board Demo Kit for AS3492

Technical Documents

Name Type Description Version Language
AS34xx_AS36xx_MobileBacklight_AN000107_1-00.pdf Application Note Selection Guide 1-00 English
AS3492_BD000271_1-00.png Block Diagram AS3492 Block Diagram 1-00 English
AS3492_DS000162_1-00.pdf Datasheet Document version 1.2 1-00 English
AS11xx_AS13xx_AS17xx_AS349x_AS36xx_EN000160_1-00.pdf EoL Notification AS11xx_AS13xx_AS17xx_AS349x_AS36xx (issued 2018-Oct) 1-00 English
AS3492_PD000276_1-00.png Other Product Document AS3492DemoKit Image 1-00 English
AS3492_UG000224_1-00.pdf User Guide Demo board 2V0 1-00 English

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