深圳市中立信电子科技有限公司

MC33262DR2G

功率因数校正 - PFC Critical Mode PFC w/OVP

Power Factor Controllers

The MC33262DR2G 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.

MC33262DR2G Also included are protective features consisting of an overvoltage comparator to eliminate runaway output voltage due to load removal, input undervoltage lockout with hysteresis, cycle−by−cycle current limiting, multiplier output clamp that limits maximum peak switch current, an RS latch for single pulse metering, and a drive output high state clamp for MOSFET gate protection. These devices are available in dual−in−line and surface mount plastic packages.

MC33262DR2G Features

• 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

• These are Pb−Free and Halide−Free Devices