High performance resonant controller IC with PFC

Posted By : Alex Lynn
High performance resonant controller IC with PFC

Efficient and cost effective controller IC solutions enable optimised LED lighting solutions. Infineon Technologies AG has announced the introduction of the second-gen ICL5102 resonant controller IC designed specifically for power supply and lighting drivers. 

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 Power Factor Correction (PFC) and half-bridge (HB) controllers in a single DSO-16 package. It supports universal input voltages ranging from 70 to 325VAC, 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 PFC is greater than 99% and Total Harmonic Distortion (THD) is less than 3.5%. The controller has up to 94% 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 250 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).

Engineering samples and a reference design, are available now. Full production is ramped up and shipment will start in Q2 2018.

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