Diodes Incorporated

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Adaptive 100/120Hz LED Current Ripple Suppressor

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The AL5822 is a 100Hz/120Hz LED current ripple suppressor for LED lighting applications. Combined with a pre-stage APFC LED driver, the AL5822 circuitry can efficiently suppress the low frequency (100Hz/120Hz) LED current ripple from the APFC output, thus eliminate the low frequency flickering for various LED lamps.

The AL5822 adopts high efficiency driving mechanism. It can automatically adapt to different LED chains’ voltage and current, to eliminate the LED current ripple, meanwhile minimize the power consumption on the Power MOSFET.

The AL5822 has built-in protections, such as Over-Temperature- Protection (OTP), Over-Current-Protection (OCP) and LED Short-Circuit Protection (SCP).

The AL5822 is available in the SOT26 package.


  • High Efficiency
  • Support Various Kinds of APFC Pre-Stage Circuit
  • Simplified External Bill of Materials (BOM)
  • No Need for Magnetic Components
  • Wide Output Voltage and Current Range
  • Tuneable LED Current Ripple Ratio
  • Flickering Free
  • Built-In LED Short-Circuit Protection (SCP)
  • Built-In Over-Current Protection (OCP)
  • Built-In Over-Temperature Protection (OTP)
  • SOT26 Package
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)


  • General LED Lamps
  • LED Power Modules

Product Specifications

Product Parameters

Minimum Input AC Voltage (VAC) 24
Maximum Input AC Voltage (VAC) 305
Maximum DC VDD (VDC) 30
LED Current (mA) External MOSFET
Frequency (kHz) N/A
Accuracy (%) 3 %
Efficiency (%) >85 %
Dimming N/A
SupplyCurrent (mA) N/A mA
Temperature Range (°C) -40 to 150 °C

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