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AS1170 2-channel LED and VCSEL driver IC

Driver with integrated boost converter and high output currents


  • High efficiency 4 MHz fixed frequency DCDC boost converter
  • Independent channel control
  • High output current
  • Channels can be combined for single output
  • Integrated protection functions
  • Automatic current adjustment for low battery voltage
  • 13 balls WLCSP 2.25mm x 1.5mm x 0.6mm


  • Very compact/small 1µH inductor due to fast switching frequency
  • Can drive 2 channels independently with up to 1000mA each or 2000mA combined
  • Integrated circuit protection
  • Automatic battery lifetime extension
  • Tiny footprint and BOM for applications with space constraints

Product parameters

Output [#] 2
LED Current per Output [mA] 1000
Features DCDC boost, I2C, INT
Error Detection Yes
Read-Back Yes
LED-to-LED Matching [%] 7
Supply Voltage [V] 2.7 - 4.4
Package WLCSP 2.25mm x 1.5mm x 0.6mm

General description

The AS1170 is a 2-channel LED/VCSEL driver with integrated boost converter. It can support up to 5.5V output voltage and each channel can support 1000mA output current. Currents can be combined to a total of 2000mA and adjusted using 31.25kHz PWM operation. AS1170 features integrated protection functions against overtemperature, over- or under voltage and open of shorted LED pins. The device has an I2C interface with 2 adresses, selectable via an I2C select pin. The 13 balls WLCSP makes this chip a good fit wherever high output currents and a tiny footprint are needed.

This product suits for the following applications:

  • Flash / torch / video light for smartphones, feature-phones
  • 3D sensing – Active Stereo Vision / Structured Light
  • Handheld scanners
  • Safety signage

Technical documents

Type Description Language
Datasheet AS1170 datasheet English

Other information

Type Description Language
Block Diagram AS1170 block diagram
Image AS1170 product image (top perspective)
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