Datasheet > 34923

34923

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		驱动器电机
页数	文件大小	规格书
16页	376K
描述
Full-Bridge PWM Motor Driver

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34923 数据手册

Freescale Semiconductor, Inc.

Order this document from Analog Marketing: MC34923/D

Rev 0, 05/2003

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Preliminary Information

34923

Full-Bridge PWM Motor Driver

Designed with Motorola’s advanced SMARTMOS, the 34923 is designed for

pulse-width modulated (PWM) current control of DC motors. It is capable of

continuous output currents up to 2.0 A and operating voltages of up to 45 V.

Internal fixed off-time PWM current-control timing circuitry can be programmed

via a serial interface to operate in slow, fast, and mixed current-decay modes.

FULL-BRIDGE PWM MOTOR

DRIVER

DIR and PWM/ENABLE input pins are provided for use in controlling the

speed and direction of a DC motor with externally applied PWM-control

signals. The PWM/ENABLE input can be programmed via the serial port to

PWM the bridge in fast or slow current decay. Internal synchronous

rectification control circuitry is provided to reduce power dissipation during

PWM operation.

Internal circuit protection includes thermal shutdown with hysteresis and

crossover-current protection. A special power-up sequencing is not required.

Features

DW SUFFIX

24-LEAD SOICW

CASE 751E-04

• ±2.0 A, 45 V Continuous Output Rating

• Low R_DS(ON)Outputs (270 mΩ, typical)

• Programmable Mixed, Fast, and Slow Current-Decay Modes

ORDERING INFORMATION

Temperature

• Serial Interface Controls Chip Functions

• Synchronous Rectification for Low Power Dissipation

• Internal Undervoltage Lockout Thermal Shutdown Circuitry

• Crossover-Current Protection

Device

Package

Range (T )

-40 to 125°C

24 SOICW

MC34923DW/R2

34923 Simplified Application Diagram

5.0 V

≤ 5.0 V

34923

PWMMODE

DIR

DCMA

PWM/ENABLE

Serial

Port

MCU

CLOCK

DATA

Motor

STROBE

DCMB

OSC

GND

This document contains information on a product under development.

Motorola reserves the right to change or discontinue this product without notice.

For More Information On This Product,

Go to: www.freescale.com

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