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MC34923

更新时间: 2024-11-22 22:39:59
品牌 Logo 应用领域
摩托罗拉 - MOTOROLA 驱动器电机
页数 文件大小 规格书
16页 376K
描述
Full-Bridge PWM Motor Driver

MC34923 数据手册

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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 RDS(ON) Outputs (270 m, 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 )  
A
-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  
DC  
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  
© Motorola, Inc. 2003  

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