Tiny, PFC boost IC comes in five-pin SOT-23 package, touts novel control system

摘要

International Rectifier's IRS2505LTRPBF is said to be the industry's smallest power factor correction (PFC) boost IC in a five-pin SOT23 package for switch mode power supply (SMPS), LED drivers, fluorescent and HID electronic ballast applications. Its control system can implement a PFC controller with only five pins, significantly reducing overall system size, component count and system cost. The IRS2505L may be configured to operate in critical conduction boost PFC, buck or flyback configuration. The IC incorporates a free-running frequency oscillator with on- and off-time control of the boost power MOSFET.