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PDF ( 数据手册 , 数据表 ) 34923

零件编号 34923
描述 Full-Bridge PWM Motor Driver
制造商 Freescale Semiconductor
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34923 数据手册, 描述, 功能
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Freescale Semiconductor, Inc.
MOTOROLA
Order this document from Analog Marketing: MC34923/D
Rev 0, 05/2003
SEMICONDUCTOR TECHNICAL DATA
Preliminary Information
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.
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.
34923
FULL-BRIDGE PWM MOTOR
DRIVER
Features
• ±2.0 A, 45 V Continuous Output Rating
• Low RDS(ON) Outputs (270 m, typical)
• Programmable Mixed, Fast, and Slow Current-Decay Modes
• Serial Interface Controls Chip Functions
• Synchronous Rectification for Low Power Dissipation
• Internal Undervoltage Lockout Thermal Shutdown Circuitry
• Crossover-Current Protection
DW SUFFIX
24-LEAD SOICW
CASE 751E-04
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC34923DW/R2 -40 to 125°C
24 SOICW
34923 Simplified Application Diagram
5.0 V
5.0 V
34923
MCU
Serial
Port
PWMMODE
DIR DCMA
PWM/ENABLE
CLOCK
DATA
STROBE
OSC
DCMB
GND
DC
Motor
This document contains information on a product under development.
Motorola reserves the right to change or discontinue this product without notice.
© Motorola, Inc. 2003
For More Information On This Product,
Go to: www.freescale.com







34923 pdf, 数据表
Freescale Semiconductor, Inc.
STROBE
CLOCK
DATA
Timing Diagram
CD
AB
D19
E
D18
F
D0
G
Legend
ID Description
A DATA Setup Time
B DATA Hold Time
C Setup STROBE-to-CLOCK Rising Edge
D CLOCK High Pulse Width
Value (ns)
15
10
50
50
ID
Description
Value (ns)
E CLOCK Low Pulse Width
F Setup CLOCK Rising Edge-to-STROBE
G STROBE Pulse Width
50
50
50
Figure 2. Serial Port Write Timing
34923
8
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
For More Information On This Product,
Go to: www.freescale.com







34923 equivalent, schematic
Freescale Semiconductor, Inc.
Information in this document is provided solely to enable system and software implementers to use Motorola products. There are no express or implied
copyright licenses granted hereunder to design or fabricate any integrated circuits or integrated circuits based on the information in this document.
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee
regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product
or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be
provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating
parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does not convey any license
under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for
surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product
could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or
unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all
claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated
with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part.
MOTOROLA and the Stylized M Logo are registered in the US Patent and Trademark Office. All other product or service names are the property of their
respective owners.
© Motorola, Inc. 2003
HOW TO REACH US:
USA/EUROPE/LOCATIONS NOT LISTED:
Motorola Literature Distribution
P.O. Box 5405, Denver, Colorado 80217
1-800-521-6274 or 480-768-2130
JAPAN: Motorola Japan Ltd.; SPS, Technical Information Center
3-20-1 Minami-Azabu. Minato-ku, Tokyo 106-8573, Japan
81-3-3440-3569
ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre
2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong
852-26668334
HOME PAGE: http://motorola.com/semiconductors
For More Information On This Product,
Go to: www.freescale.com
MC34923/D










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