AS3668 Smartlight Driver

4-channel breathlight controller


  • Highly accurate 4-channel high side 25.5mA current sources
  • Audio controlled lighting with internal digital filters


  • Easy generation of complex differentiating lighting effects
  • Smooth ramps and accurate colors
  • Smart audio controlled lighting effects

Product parameters

# of Current Sinks 4
Charge Pump [mA] 150
User Memory [kbit]
Performance Features [RGB Pattern] Yes
- [Dimming] Log / linear
- [Ext. PWM] Yes
- [Ext. Trigger] Yes
- [Audio-In] Yes
- [LED Test] Yes
Package WL-CSP12 (1.25x1.68)-0.4

General Description

The AS3668 is a 4-channel LED driver designed to produce lighting effects for portable devices. A highly efficient charge pump enables LED driving over full Li-ion battery voltage range. The device is equipped with an internal program memory, which allows control of LED patterns even without processor control.

Not Recommended for New Designs
ams AG is discontinuing production of this device.

This product suits for the following applications:

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


Type Description Language
Application Data Carrier PCB Module English

Technical Documents

Type Description Language
Datasheet Document version 1.13 English
Application Note Selection Guide English
User Guide Evaluation board 1v1 English

Environmental Documents

Type Description Language
RoHS Certificate RoHS Certificate AS3668 English


Type Description Language
EoL Notification AS2540, AS13xx, AS3668, AS3709, AS371x, AS7620 (issued 2019-Jun) English

Other Information

Type Description Language
Block Diagram AS3668 Block Diagram English