New Industry Products

High-Performance Resonant Controller IC with PFC

July 10, 2018 by Paul Shepard

Efficient and cost-effective controller IC solutions enable optimized LED lighting solutions. Infineon Technologies AG has introduced the second generation ICL5102 resonant controller IC designed specifically for power supply and lighting drivers.

Engineering samples and a reference design, REF-ICL5102-U130W-CC (pictured above), are available now. Main target applications are LED drivers for professional and industrial lighting, and street lighting. The controller IC can also be used for offline ac-dc power supplies and LCD TVs.

The ICL5102 integrates PFC and half-bridge controllers in a single DSO-16 package. It supports universal input voltages ranging from 70- to 325-Vac, and has a comparable wide output range.

A low number of external components are required to configure and support this controller IC. All parameters are set by resistors.

The ICL5012 supports fast startup under 500ms at less than 100µA. The industry-leading PFC is greater than 99 percent and THD is less than 3.5 percent.

The controller has up to 94 percent efficiency by resonant topology. The active burst mode for low standby consumes less than 300mW. An enable/disable function supports dimming.

The PFC controller features brownout detection, adjustable THD for light load operation, and high power factor correction. Due to the high accuracy of BUS voltage sensing, only four PINs are required for PFC action.

The resonant HB controller has a fully integrated 650V high-side driver using an internal coreless transformer with self-adaptive dead time ranging between 250ns and 750ns, and an operating frequency up to 500kHz.

It can detect overload, short circuit, BUS, HB or output under and over voltage as well as over temperature.

An integrated capacitive mode regulator prevents operation in capacitive mode. All protection features use AUTO restart (No Latch).

Summary of Features:

  • Universal input 70- to 325-Vac
  • Highest efficiency up to 94% by resonant topology
  • THD <3.5%, PF >0.95
  • Burst mode, low standby
  • Low BOM cost
    • Combo controller IC
    • 500V MOSFETs at LLC stage
    • Low cost resistors to set working points


  • Enables global designs
  • Can be used from 40-250W
  • Best-in-class PFC and THD at full and light load
  • High efficiency: more lumen output and less thermal load
  • No components required to match the PFC and LLC stage
  • Protection and auto restart