Nov 3, 2010 PRELIMINARY IR1145SPBF FIXED 66kHz FREQUENCY, PFC ONE CYCLE CONTROL PFC IC WITH BROWN-OUT PROTECTION Features * VCC under voltage lockout * Programmable soft start * Micropower startup * User initiated micropower "Sleep Mode" * 750mA peak gate drive * Latch immunity and ESD protection * PFC IC with IR proprietary "One Cycle Control" * Continuous conduction mode boost type PFC * Fixed 66kHz switching frequency * Average current mode control * Input line sensed brownout protection * Output overvoltage protection * Open loop protection * Cycle by cycle peak current limit Description Package IR1145 power factor correction IC, based on IR proprietary "One Cycle Control" (OCC) technique, provides for high PF and excellent DC Bus regulation while enabling drastic reduction in component count, PCB area and design time as compared to traditional solutions. The IC is designed to operate in 85-264VAC universal input, continuous conduction mode Boost PFC at fixed 66kHz switching frequency. IR1145 features include input-line sensed brown-out protection, overvoltage protection, cycle by cycle peak current limit, open loop protection, VCC UVLO, soft-start and micropower startup current of less than 150A. In addition, for standby power requirements, the IC can be driven into a micropower sleep mode by pulling the OVP/EN pin low where the current consumption is less than 150uA. The IR1145 is available in SO-8 packages. IR1145 Application Diagram ACIN1 - + VOUT VCC ACIN2 1 2 3 4 COM GATE COMP VCC ISNS VFB BOP OVP/EN 8 + 7 6 5 IR1145 RTN www.irf.com (c) 2010 International Rectifier Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: International Rectifier: IR11452STRPBF IR11452SPBF