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

LDS Diodes AL5822 400

June 24, 2019

Diodes Incorporated recently announced the availability of the AL5822 LED current ripple suppressor, which provides high levels of ripple suppression while maintaining high power factor for commercial and industrial lighting applications.

It is now mandatory to meet regulatory requirements to suppress low frequency ripple (100Hz to 120Hz) in LED lighting applications in many markets, enforced through standards such as the California Energy Commission Title 24. 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 there is no sign of flicker or strobing across the entire dimming range, while still maintaining a high power factor.

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 the AL5822 suppresses over 97% of ripple while still achieving a power factor of greater than 0.9.

By monitoring the current flowing through the LEDs, the AL5822 compensates for ripple by adjusting the drive voltage for the external MOSFET. This control loop keeps the MOSFET operating in the saturation region to deliver a constant current.

With support for various pre-stage circuits, the AL5822 can work with a number of drivers, such as the AL1665 single stage PFC flyback buck/boost controller, also from Diodes Incorporated. The integrated features of the AL5822 remove the need for magnetic discrete components, minimizing the overall bill of materials.

The AL5822 operates over an input voltage range of 24VAC to 305VAC. Safety features include LED short-circuit, over-temperature, and over-current protection.

Go HERE for more information

Related Articles


Changing Scene

  • LEDVANCE Expands Ontario Presence with New Specification Agent

    LEDVANCE Expands Ontario Presence with New Specification Agent

    LEDVANCE is pleased to announce the appointment of Sterling Architectural Products Ltd. (Sterling Lights) as their new specification agent in Ontario. This partnership strengthens LEDVANCE’s presence in the region and reinforces their commitment to serving the professional lighting design and specification community with innovative, reliable lighting solutions. With decades of experience and a service-driven mindset,… Read More…

  • May 29, 2025 - Eureka Wins Three 2025 Red Dot Awards for Product Design

    Eureka Wins Three 2025 Red Dot Awards for Product Design

    Eureka is pleased to announce that its Velia, Cirra, and Junction luminaires have each received a 2025 Red Dot Design Award for Product Design. It is the 11th consecutive year that Eureka products have been honored with this prestigious award, which is a testament to the company’s consistency and relentless drive to design exceptional luminaires.… Read More…


Design

  • The Difference Between Accent, Ambient & Task Lighting: Ultimate Guide

    The Difference Between Accent, Ambient & Task Lighting: Ultimate Guide

    In interior design, lighting is not just about brightening the room. Sensitive lighting layout is the key in the whole aesthetic atmosphere. An outstanding lighting solution will not rely on one type of fixture. Rather, it is through the combination of different types of lighting. Accent, ambient, and task lighting are three basic types of… Read More…

  • Graphic Office Interiors Enhance Their Office Space, Incorporating State-Of-The-Art Lighting Solutions

    Graphic Office Interiors Enhance Their Office Space, Incorporating State-Of-The-Art Lighting Solutions

    Graphic Office Interiors, a renowned office design and furnishings company serving Vancouver Island since 1966, embarked on a unique lighting project for their personal office in Saanichton, BC. This project marked the first collaboration between Kelly Inglis of Mac’s II Agencies and Graphic Office Interiors’ in-house registered interior designer, Laura Harlos. Known for their exclusive Steelcase furniture line, modular moveable… Read More…


New Products

  • Eureka Announces New Accessories for Scout Luminaire

    Eureka Announces New Accessories for Scout Luminaire

    Eureka has announced the enhancement of its Scout luminaire family with the introduction of new accessories and a new color palette. Three new diffusers have been introduced. Bell is minimalist, translucent and cloche-shaped. Pebble introduces a soft touch and an ambient glow in a distinct, oval-shaped diffuser. Orb is sleek and dome-shaped, adding a touch… Read More…

  • Amico: SOLAR ECLIPSE – 2X4 Multi-Functional Luminaire

    Amico: SOLAR ECLIPSE – 2X4 Multi-Functional Luminaire

    The Solar Eclipse Series provides a multi-functional luminaire that supports the demands of the hospital environment. The sleek and modern design merges architectural aesthetics with exceptional lighting performance to improve patient comfort while maximizing clinical efficiencies. This architectural patient room fixture offers reading, ambient, and exam functionalities and an optional night light. Multi-functional capabilities provide… Read More…