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AS1121 LED Driver IC

16-channel 40mA 30V PWM LED driver IC


  • 12-bit PWM control (4096 steps)
  • 6-bit analog current control
  • Open/Short error detection
  • Fast output drivers


  • 6.8 billion colors
  • RGB LED white point adjustment
  • Improved picture quality & reduced maintaince cost through identifying defect LEDs & its position
  • Excellent PWM performance over all duty cycles

Product parameters

Outputs [#] 16
LED Current per Output [mA] 40
Features 12-bit PWM, 6-bit DOT, low EMI
Error Detection Yes
Read-Back Yes
LED-to-LED Matching [%] 1.5
Supply Voltage [V] 3.1 to 3.6V Logic; 30V LED
Package TQFN(5x5)-32

General Description

The AS1121 is a SPI interfaced, 40mA 16-channel direct LED driver IC with 12-bit internal PWM and 6-bit analog current adjustment. It can detect open/short LED position during operation. The AS1121 allows up to 30V on the LED outputs.

This product suits for the following applications:

  • Public information displays
  • Stadium displays
  • Illumination
  • Ambient light
  • TV ambient light


Title Category Headline Buy
AS1121EvalKit Application Board Evaluation Kit for AS1121


Name Type Description Language Software Eval SW 1v04 English

Technical Documents

Name Type Description Version Language
AS1121_BD000256_1-00.png Block Diagram AS1121 Block Diagram 1-00 English
AS1121_DS000218_1-00.pdf Datasheet Document version 1.01 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
AS1121_UG000197_2-00.pdf User Guide Demo board 2-00 English

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