LD7592Transition-Mode PFC Controller with Fault Condition Protection

The LD7592 is a voltage mode PFC controller operating on transition mode, with several integrated functions of protection, such as OVP, OCP, and Brown-in protection. It reduces the components counts and is available in a SOP-8 or DIP-8 package. Those make it an ideal design for low cost applications.

It provides functions of low startup current, over voltage protection, open feedback protection, disable function, over current protection, under voltage lockout and integrated LEB of current sensing. The LD7592 adopts transition mode for power factor correction and realizes high efficiency and a low switching noise by zero current switching.




  • Transition Mode of PFC Pre-Regulator
  • Voltage Mode Control
  • Programmable Max. On-Time
  • ZCD Auxiliary Winding is Unnecessary
  • Low Startup Current (<1mA)
  • UVLO (Under Voltage Lockout)
  • LEB (Leading-Edge Blanking) on CS pin
  • VCC OVP (Over Voltage Protection) on VCC pin
  • VO OVP (Over Voltage Protection) on INV pin
  • Bulk Cap OVP (Over Voltage Protection) on OVP pin
  • OCP (Cycle by Cycle Current Limit)
  • 900/-1200mA Driving Capability
  • Internal OTP (Over Temperature Protection)



  • Adaptor of Output above 75W.
  • LCD TV Power Supply