IR's Family of Power Factor Correction ICs Offer Enhanced System Protection and Safety - Reducing Design Size and Overall System Cost



International Rectifier, a world leader in power management technology, today introduced the IR115x family of μPFC™ power factor correction (PFC) ICs for a wide variety of AC-DC applications including lighting, LCD/PDP TV and game console Switch Mode Power Supplies (SMPS), fans, air conditioners, and uninterruptible power supplies (UPS) ranging from 300 W to 8 kW. The IR115x ICs, utilizing IR's One Cycle Control (OCC) technology, offer high power factor (PF), low total harmonic distortion (THD) and excellent DC Bus regulation while enabling drastic 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 85-264 VAC input line voltage range. "By integrating more features than traditional PFC solutions and eliminating the need for external implementation, the IR115x significantly reduces the overall cost and complexity of a feature-rich PFC control design compared to traditional PFC solutions while offering enhanced protection and safety," said Helen Ding, senior applications engineer, IR's Energy Saving Products Business Unit. The new 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 and programmable soft-start. The user initiated micropower startup/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 48 kHz to 200 kHz based on the specific application requirement. The IR1152S and IR1153S offer fixed switching frequency of 66 kHz and 22.2 kHz respectively. These devices are compatible with IR's Ultrafast and Warp IGBTs for systems with power ratings higher than 750 Watt and switching frequency up to 100 kHz. Design Tools Datasheets, an application note and online design tool are available on the International Rectifier website at The IRAC1152-350W and IRAC1155-300W reference designs are also available. Availability and Pricing Available in an 8-pin SOIC package, pricing begins at US $0.50 each in quantities of 10,000-units for the IR1152S. The IRAC1152-350W and IRAC1155-300W reference designs cost US $170 and US $140 per kit respectively. Production quantities are available immediately. The devices are lead free and RoHS compliant. Prices are subject to change.