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PFC ICs enhance system protection in AC-DC apps

Posted: 17 Mar 2011     Print Version  Bookmark and Share

Keywords:power factor correction IC  PFC  THD 

International Rectifier unveils the IR115x family of µPFC power factor correction ICs that utilises IR's One Cycle Control (OCC) technology, promising high power factor (PF), low total harmonic distortion (THD) and excellent DC Bus regulation while enabling reduction in component count, PCB area and design time compared to traditional solutions.


The ICs are designed to operate in continuous conduction mode Boost PFC converters with average current mode control over 85-264VAC input line voltage range targeting a wide variety of AC-DC applications including lighting, LCD/PDP TV and game console Switch Mode Power Supplies, fans, air conditioners, and uninterruptible power supplies ranging from 300W to 8kW.

The µPFC ICs offer advanced system-enabling and protective features including dedicated pin for over-voltage protection, cycle by cycle peak current limitation, open loop protection, VCC UVLO, programmable soft-start. The user initiated micropower start-up/sleep-mode enables compliance with standby power requirements mandated by regulations such as Energy Star, Green Power and Blue Angel. The IR1152S and IR1153S also feature brown-out protection.

The IR1155S offers programmable switching frequency between 48kHz to 200kHz based on the specific application requirement. The IR1152S and IR1153S offer fixed switching frequency of 66kHz and 22.2kHz respectively. These devices are compatible with IR's Ultrafast and Warp IGBTs for systems with power ratings higher than 750W and switching frequency up to 100kHz.

Available in an 8-pin SOIC package, pricing begins at Rs.22.74 ($0.50), Rs.24.56 ($0.54) and Rs.25.92 ($0.57) each in quantities of 10,000-units for the IR1152S, IR1153S and IR1155S. The IRAC1152-350W and IRAC1155-300W reference designs cost Rs.7,731.75 ($170) and Rs.6,367.33 ($140) per kit respectively. Production quantities are available immediately. The devices are lead free and RoHS compliant.

- Paul Buckley
EE Times-Europe

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