Datasheet4U Logo Datasheet4U.com

AN667 - DESIGNING A HIGH POWER FACTOR SWITCHING PREREGULATOR

Description

Supply Block (see fig.

2): A precise bandgap reference is internally built to ensure a good regulation.

The undervoltage comparator with hysteresis and the very-low supply current, before the turn-on threshold is reached, allows to minimize the startup and supply circuitry.

Features

  • are:.
  • Undervoltage lockout with hysteresis and micropower start-up.
  • Stable error amplifier.
  • Output overvoltage protection.
  • Transition Mode Operating.
  • Zero Current and coil Voltage detection.
  • Internal start oscillator. Device Blocks.

📥 Download Datasheet

Datasheet Details

Part number AN667
Manufacturer ST Micro
File Size 493.89 KB
Description DESIGNING A HIGH POWER FACTOR SWITCHING PREREGULATOR
Datasheet download datasheet AN667 Datasheet

📁 Similar Datasheet

  • AN66 - CMOS Gate Array (AMI)
  • AN6607NS - DC Motor Forward / Reverse Dual Speed Electronic Govemor (Panasonic)
  • AN6608 - DC Motor Forward/Reverse Dual Speed Electronic Governors (Panasonic Semiconductor)
  • AN6609N - DC Motor Forward/Reverse Dual Speed Electronic Governors (Panasonic Semiconductor)
  • AN6609NS - DC Motor Forward/Reverse Dual Speed Electronic Governors (Panasonic Semiconductor)
  • AN6610 - Motor Control Circuit (Matsushita Electric)
  • AN6612 - Motor Control Circuits (Panasonic Semiconductor)
  • AN6612S - Motor Control Circuits (Panasonic Semiconductor)
  • AN663 - MCU (Silicon Laboratories)
  • AN6650 - Motor Speed Control Circuit (Unisonic Technologies)
Other Datasheets by ST Micro

    Full PDF Text Transcription

    Click to expand full text
    ® APPLICATION NOTE DESIGNING A HIGH POWER FACTOR SWITCHING PREREGULATOR WITH THE L6560/A TRANSITION MODE I.C. by G. Comandatore and U. Moriconi Active power factor correction techniques are going to grow in conversion applications. Market interest (legislation to be considered) is also moving towards fairly low (36-150W) conversion power ranges (lighting, monitor). This paper describes an "easy to use" 8 Pin Controller that allows the realization of very low cost offline Power Factor Correction. Switching at a frequency much higher than the line, the preregulator draws a half-sinusoidal input current, in phase with the line voltage. BOOST TOPOLOGY with its inductor at the input is well suited for PFC application.
    Published: |