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AS3665 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] Yes
- [LED Test] Yes
Package WL-CSP25 (2.61x2.67)-0.5

General Description

The AS3665 is a capacitive low noise charge pump with 9 current sources. The internal control is done by command based pattern generators implemented by three sequencers. These commands are optimized for lighting applications (e.g. ramp up brightness logarithmically). It includes high level commands like conditionals jumps and variables.

This product suits for the following applications:

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


Title Category Headline Buy
AS3665DemoKit Application Board Demo Kit for AS3665
AS3665DemoKitDual Application Board Demo Kit Dual for AS3665


Name Type Description Language Software Eval SW 3v04 English

Technical Documents

Name Type Description Version Language
AS3665_BD000277_1-00.png Block Diagram AS3665 Block Diagram 1-00 English
AS3665_DS000248_1-00.pdf Datasheet Document version 1.0.2 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
AS3665_PD000277_1-00.png Other Product Document AS3665DemoKit Image 1-00 English
AS3665_PD000388_1-00.png Other Product Document AS3665DemoKitDual Image 1-00 English
AS3665_UG000225_1-00.pdf User Guide Demo board 1-00 English

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