ams AG - global leader in the design and manufacture of high performance analog ICs (integrated circuits)

AS3661 SmartLight Driver

Programmable, 9 channel smartlight LED driver


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


Key Features

  • 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

Key Benefits

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

Product Facts

Performance [# of current sinks] 9
- [charge pump] 150mA
User memory [kbit] 1.5
Performance Featrues [RGB pattern]
- [dimming] log & lin
- [ext. PWM]
- [ext. trigger]
- [Audio-In]
- [LED Test]
Package WL-CSP25 (2.29x2.29)-0.4

Additional Information


Indicator LEDs in smart watches, mobile phones and battery powered portable devices