ON MC33262D

Критическая проводимость (CRM)

Overview

The MC34262/MC33262 are active power factor controllers specifically designed for use as a preconverter in electronic ballast and in off–line power converter applications. These integrated circuits feature an internal startup timer for stand–alone applications, a one quadrant multiplier for near unity power factor, zero current detector to ensure critical conduction operation, transconductance error amplifier, quickstart circuit for enhanced startup, trimmed internal bandgap reference, current sensing comparator, and a totem pole output ideally suited for driving a power MOSFET.

•Overvoltage Comparator Eliminates Runaway Output Voltage •Internal Startup Timer •One Quadrant Multiplier •Zero Current Detector •Trimmed 2% Internal Bandgap Reference •Totem Pole Output with High State Clamp •Undervoltage Lockout with 6.0 V of Hysteresis •Low Startup and Operating Current •Supersedes Functionality of SG3561 and TDA4817

Features

Applications

• Personal communication device
• Portable telephone
• Electronic notebook
• Camera
• Video equipment
• CPU power supply
• Switching regulator
• Multiple-power supply system
• Digital audio player
• Digital TV