Description： 

The μPFC IR1155 power factor correction IC, based on IR proprietary "OneCycle Control" (OCC) technique, provides for high PF, low THD andexcellent DC Bus regulation while enabling drastic reduction in componentcount, PCB area and design time as compared to traditional solutions. TheIC is designed to operate in continuous conduction mode Boost PFCconverters with average current mode control over 85-264VAC input linevoltage range. Switching frequency can be programmed to anywherebetween 48kHz to 200kHz based on the specific application requirement.In addition, IR1155 offers several advanced system-enabling and protectivefeatures such as dedicated pin for over voltage protection, cycle by cyclepeak current limitation, open loop protection, VCC UVLO, soft-start andmicropower startup/sleep-mode with IC current consumption less than200µA. The sleep mode, invoked by pulling the OVP/EN pin low, enablescompliance with standby power requirements mandated by regulationssuch as Energy Star, Green Power, Blue Angel etc.

Features:

• PFC IC with IR proprietary “One Cycle Control”

• Continuous conduction mode boost type PFC

• Programmable switching frequency (48k-200kHz)

• Average current mode control

• Output overvoltage protection

• Open loop protection

• Cycle by cycle peak current limit 

• VCC under voltage lockout

• Programmable soft start

• Micropower startup

• User initiated micropower “Sleep Mode”

• OVP/EN pin internal filtering for higher noise immunity

• 1.5A peak gate drive

• Latch immunity and ESD protection