Adaptive LED Current Ripple Suppressor Enables High Power Factor and Flicker-Free Professional LED Lighting

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ByMunna Pandit 0

Adaptive LED Current Ripple Suppressor Enables High Power Factor and Flicker-Free Professional LED Lighting

Diodes Incorporated today released the AL5822 LED current ripple suppressor, which provides high levels of ripple suppression while maintaining high power factor for commercial and industrial lighting applications. The AL5822 has been designed and tested to comply with the Title 24 building code requirement of less than 30% flicker. The results show that, while still achieving a power factor of greater than 0.9, the AL5822 suppresses over 97% of ripple.

 

The AL5822 delivers a high level of ripple current suppression in single-stage, high power LED installations, even when triac or PWM dimming techniques are being used to vary the light level. This ensures that while still maintaining a high power factor there is no sign of flicker or strobing across the entire dimming range. The AL5822 compensates for ripple by adjusting the drive voltage for the external MOSFET by monitoring the current flowing through the LEDs. This control loop keeps the MOSFET operating in the saturation region to deliver a constant current.

 

Features 

  • Support Various Kinds of APFC Pre-Stage Circuit
  • Flickering Free
  • No Need for Magnetic Components
  • operates over an input voltage range of 24VAC to 305VAC
  • Safety features such as LED short-circuit, over-temperature, and over-current protection

The devices comes in SOT26 package and are totally Lead-Free, Fully RoHS Compliant, Halogen and Antimony Free.

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