MC34262

DESCRIPTION

The UTC MC34262 is an active power factor controller that

functions as a boost preconverter in electronic ballast and in off-line

power converter applications.

These integrated circuits feature an internal startup timer for

stand-alone applications, one quadrant multiplier for near unity

power factor, zero current detector to ensure critical conduction

operation, transconductance error amplifier, quick start circuit for

enhanced startup, trimmed internal bandgap reference, current

sensing comparator, and a totem pole output ideally suited for

driving a power MOSFET.

The multi-protection function of UTC MC34262 can greatly

enhance the system reliability and safety. The UTC MC34262

features output over voltage protection, input UVLO with

hysteresis, cycle-by-cycle current limiting, multiplier output clamp

that limits maximum peak switch current, and a drive output high

state clamp for MOSFET gate protection. These devices are

available in dual-in-line and surface mount plastic packages.

FEATURES

* Output over voltage protection

* Internal Startup Timer

* One Quadrant Multiplier

* Zero Current Detector

* Trimmed 2% Internal Bandgap Reference

* Totem Pole Output with High State Clamp

* Undervoltage Lockout (UVLO) with 5.0V of Hysteresis

* Low Startup and Operating Current

* Supersedes Functionality of SG3561, TDA4817 and UTC

规格书MC34262