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L8565 - HIGH PERFORMANCE POWER FACTOR CORRECTION CONTROLLER

Description

The UTC L8565 is a wide input range controller integrated circuit for active power factor correction.

The circuit is designed for boost PFC application, and requires reduced external component count.

Features

  • Supports wide input range.
  • Average current control.
  • Ease of use with few external components.
  • External current and voltage loop compensation.
  • Trimmed internal reference voltage (5V±2%).
  • Programmable operating/switching frequency.
  • (50kHz ~ 250kHz).
  • Max duty cycle of 95% (typ) at 125kHz.
  • Under voltage lockout.
  • Cycle by cycle peak current limiting.
  • Over-voltage protection.
  • Open loop detection.
  • Output under-voltage detection.

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Full PDF Text Transcription

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UNISONIC TECHNOLOGIES CO., LTD L8565 Preliminary LINEAR INTEGRATED CIRCUIT HIGH PERFORMANCE POWER FACTOR CORRECTION CONTROLLER IN CONTINUOUS CONDUCTION MODE  DESCRIPTION The UTC L8565 is a wide input range controller integrated circuit for active power factor correction. The circuit is designed for boost PFC application, and requires reduced external component count. Its power supply is recommended to be provided by an external auxiliary supply which will switch on and off the IC. The circuit operates in the continuous conduction mode under average current, and in discontinuous conduction mode only in light load condition. The switching frequency can be set with the external resistor at pin 4.
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