MC34129 Motorola, MC34129 Datasheet

MC34129

Manufacturer Part Number

MC34129

Description

DIP-14

Manufacturer

Motorola

Datasheets

1.MC34129.pdf (16 pages)

2.MC34129.pdf (16 pages)

Specifications of MC34129

Date_code

08+

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Part Number

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Meier Automation Equipment Co., Limited

Part Number:

MC34129D

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MC34129DR

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Part Number:

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Part Number:

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High Performance

Current Mode Controllers

regulators specifically designed for use in low power digital telephone

applications. These integrated circuits feature a unique internal fault timer

that provides automatic restart for overload recovery. For enhanced system

efficiency, a start/run comparator is included to implement bootstrapped

operation of V CC . Other functions contained are a temperature compensated

reference, reference amplifier, fully accessible error amplifier, sawtooth

oscillator with sync input, pulse width modulator comparator, and a high

current totem pole driver ideally suited for driving a power MOSFET.

undervoltage lockout, cycle–by–cycle current limiting, adjustable deadtime,

and a latch for single pulse metering.

systems, they can be used cost effectively in many other applications.

MOTOROLA ANALOG IC DEVICE DATA

C Soft–Start

Sync/Inhibit

The MC34129/MC33129 are high performance current mode switching

Also included are protective features consisting of soft–start,

Although these devices are primarily intended for use in digital telephone

Current Mode Operation to 300 kHz

Automatic Feed Forward Compensation

Latching PWM for Cycle–by–Cycle Current Limiting

Continuous Retry after Fault Timeout

Soft–Start with Maximum Peak Switch Current Clamp

Internally Trimmed 2% Bandgap Reference

High Current Totem Pole Driver

Input Undervoltage Lockout

Low Startup and Operating Current

Direct Interface with Motorola SENSEFET Products

V ref 2.5V

R T /C T

Input

Gnd

Fault Timer

Soft–Start

Oscillator

Simplified Block Diagram

and

Freescale Semiconductor, Inc.

For More Information On This Product,

Latching

PWM

Go to: www.freescale.com

Undervoltage

Reference

Start/Run

Lockout

1.25V

Error Amp

–

Start/Run

Output

V CC

V ref 1.25V

Noninverting

Input

Drive Out

Drive Gnd

Ramp Input

Inverting

Input

Feedback/

PWM Input

MC34129D

MC34129P

MC33129D

MC33129P

Motorola, Inc. 1996

Device

Drive Ground

Drive Output

Ramp Input

Sync/Inhibit

V ref 2.5 V

HIGH PERFORMANCE

R T /C T

ORDERING INFORMATION

Input

Gnd

CURRENT MODE

MC34129

MC33129

CONTROLLERS

SEMICONDUCTOR

Temperature Range

TECHNICAL DATA

Order this document by MC34129/D

T A = – 40 to +85 C

PIN CONNECTIONS

T A = 0 to +70 C

Operating

(Top View)

PLASTIC PACKAGE

CASE 751A

CASE 646

14 V CC

D SUFFIX

P SUFFIX

(SO–14)

Start/Run Output

C Soft–Start

Feedback/

PWM Input

Error Amp

Inverting Input

Error Amp

Noninverting Input

V ref 1.25 V

Plastic DIP

Package

SO–14

Rev 1

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