MC34261P Motorola, MC34261P Datasheet

MC34261P

Manufacturer Part Number

MC34261P

Description

DIP-8

Manufacturer

Motorola

Datasheets

1.MC34261P.pdf (12 pages)

2.MC34261P.pdf (26 pages)

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Power Factor Controllers

designed for use as a preconverter in electronic ballast and in off–line power

converter applications. These integrated circuits feature an internal startup

timer, a one quadrant multiplier for near unity power factor, zero current

detector to ensure critical conduction operation, high gain error amplifier,

trimmed internal bandgap reference, current sensing comparator, and a

totem pole output ideally suited for driving a power MOSFET.

lockout with hysteresis, cycle–by–cycle current limiting, and a latch for single

pulse metering. These devices are available in dual–in–line and surface

mount plastic packages.

Multiplier

MOTOROLA ANALOG IC DEVICE DATA

The MC34261/MC33261 are active power factor controllers specifically

Also included are protective features consisting of input undervoltage

Internal Startup Timer

One Quadrant Multiplier

Zero Current Detector

Trimmed 2% Internal Bandgap Reference

Totem Pole Output

Undervoltage Lockout with Hysteresis

Low Startup and Operating Current

Pinout Equivalent to the SG3561

Functional Equivalent to the TDA4817

Input

Gnd

Zero Current Detector

Reference

2.5V

Simplified Block Diagram

Multiplier,

Multiplier

Latch,

PWM,

Timer,

Logic

Compensation

Undervoltage

Lockout

Error Amp

V ref

Current Sense

Zero Current

Detect Input

V CC

Drive Output

Input

Voltage

Feedback

Input

MC34261D

MC34261P

MC33261D

MC33261P

Motorola, Inc. 1996

Device

Voltage Feedback

Multiplier Input

Compensation

Current Sense

ORDERING INFORMATION

POWER FACTOR

MC34261

MC33261

CONTROLLERS

SEMICONDUCTOR

Temperature Range

TECHNICAL DATA

Order this document by MC34261/D

T A = – 40 to +85 C

PIN CONNECTIONS

Input 1

Input

T A = 0 to +70 C

Operating

(Top View)

PLASTIC PACKAGE

CASE 626

CASE 751

P SUFFIX

D SUFFIX

(SO–8)

Zero Current

V CC

Drive Output

Gnd

Detect Input

Plastic DIP

Package

SO–8

Rev 1

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