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AS3661 Smartlight Driver

Programmable, 9-channel smartlight LED driver


  • Three independent program execution engines; 9 programmable outputs
  • 8-bit current setting resolution and 12-bit PWM control resolution
  • Adaptive charge pump with 1x and 1.5x gain


  • Easy generation of complex differentiating lighting effects
  • Smooth ramps and accurate colors
  • Up to 95% LED drive efficiency

Product parameters

# of Current Sinks 9
Charge Pump [mA] 150
User Memory [kbit] 1.5
Performance Features [RGB Pattern] Yes
- [Dimming] Log / linear
- [Ext. PWM]
- [Ext. Trigger] Yes
- [Audio-In]
- [LED Test] Yes
Package WL-CSP25 (2.29x2.29)-0.4

General Description

The AS3661 is a 9-channel LED driver designed to produce lighting effects for mobile devices. A high efficiency charge pump enables LED driving over full Li-ion battery voltage range. The device is equipped with an internal program memory, which allows operation without processor control.

This product suits for the following applications:

  • Smart watches
  • Mobile phones
  • Battery-powered portable devices


Title Category Headline Buy
AS3661EvalKit Application Board Evaluation Kit for AS3661


Name Type Description Language Software Eval SW setup English

Technical Documents

Name Type Description Version Language
AS3661_BD000276_1-00.png Block Diagram AS3661 Block Diagram 1-00 English
AS3661_DS000339_1-00.pdf Datasheet Document version 1-31 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
AS3661_PD000387_1-00.png Other Product Document AS3661EvalKit Image 1-00 English
AS3661_UG000141_1-00.pdf User Guide Evaluation board 1-00 English

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