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Home » NEWEST Products » New by Manufacturer » International Rectifier » IRS2505L PFC Boost IC - IR
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International Rectifier IRS2505L Boost PFC Control IC

International Rectifier IRS2505L Boost PFC Control IC

International Rectifier's IRS2505L Boost PFC Control IC is the world's first offline AC-DC PFC Boost IC that operates in critical-conduction mode. The device features a novel control system that can implement a PFC controller with only five pins, significantly reducing overall system size, component count and system cost. The IC incorporates a free-running frequency oscillator with on- and off-time control of the boost power MOSFET without the need for a secondary winding. Also included in the design is over-voltage protection of the DC bus and cycle-by-cycle over-current protection of the power MOSFET. Micro-power start-up current and an internal 20.8V zener clamp at VCC are provided to simplify the external VCC supply circuitry. ESD and latch immune CMOS technology enables a rugged monolithic IC construction.

  • Critical-conduction mode PFC control
  • High PF and ultra-low THD
  • Wide input voltage and load range
  • Regulated DC bus output voltage
  • Programmable DC bus voltage level
  • DC bus over-voltage protection
  • Programmable MOSFET over-current protection
  • Inductor current zero-crossing detection
  • Micro-power start-up current
  • 20.8V internal Zener clamp on VCC
  • Excellent latch immunity on all inputs and outputs
  • Integrated ESD protection on all pins
  • Small SOT-23 5L package
  • Switched Mode Power Supply Applications
  • Laptop Power Adapter
  • LCD/LED Backlit TV (under 100W)
  • Lighting Applications
  • Linear Fluorescent Lighting Ballast (25-200W)
  • HID Lighting Ballast (25W-1000W)
  • LED Drivers (Flyback topologies up to 60W)
  • Induction Lighting
Application Diagram
Application Diagram
  • International Rectifier