Power factor correction ICs enable reduced component count

International Rectifier introduces 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 the company'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 to 264 Vac input line voltage range.

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

For more information, contact International Rectifier, 233 Kansas St., El Segundo, CA 90245. Phone: (310) 252-7105.