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34921

更新时间: 2022-04-23 23:00:11
品牌 Logo 应用领域
飞思卡尔 - FREESCALE 电机驱动
页数 文件大小 规格书
36页 845K
描述
Configurable Motor Driver IC with Power Supplies

34921 数据手册

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MC34921  
Rev 5.0, 07/2005  
Freescale Semiconductor  
Technical Data  
Configurable Motor Driver IC  
with Power Supplies  
34921  
The 34921 power IC integrates multiple motor drivers, multiple  
power regulators, and most other analog functions a small consumer  
motion-enabled product needs. The 34921’s circuitry is fully protected  
with current limiting, short-circuit shutdown, over-temperature, over-  
voltage, and under-voltage detection. Supervisory functions can be  
read and programmed through a 8-MHz Serial Interface.  
H-BRIDGE MOTOR DRIVER  
AND POWER SUPPLY  
A 5.0 V dual-mode (linear or switching) voltage regulator, 3.3 V  
switching buck regulator, and a voltage-selectable (1.5 V, 1.8 V, 2.5 V)  
linear regulator provide power management. Two H-Bridges and a  
configurable motor driver are provided for controlling two dc motors  
and one unipolar stepper motor.  
The highly integrated 34921 brings together sensing,  
communication, power management, system protection, and motor  
control in one device.  
AE SUFFIX (Pb-Free)  
98ARH98426A  
64-LEAD LQFP-EP  
Features  
• Two Functionally Identical Pulse-Width Modulated (PWM) DC Motor  
Drivers  
• One Switching, One Linear, and One Dual-Mode Regulator  
• Dual Mode Switching/Linear 5.0 V Regulator  
• Supervisory Functions (Power-ON Reset and Error Reset Circuitry)  
• 8-Channel, 8-Bit Analog-to-Digital Converter (ADC)  
• Charge Pump for High-Side MOSFET Drive  
• Complete Support for  
ORDERING INFORMATION  
Temperature  
Device  
Package  
Range (T )  
A
MC34921AE/R2  
0°C to 70°C  
64 LQFP-EP  
• Analog Quadrature Encoder  
• Pb-Free package is designated by suffix AE  
B+  
5.0 V / 3.3 V  
34921  
B+  
Serial MISO  
MOSI  
SCLK  
High-Side  
MOSFET  
MCU  
GATEOUT  
5.0 V  
3.3 V  
VCORE  
CE  
Ports  
A/D  
AN0  
AN3  
ADCMA  
APWM  
Inputs  
B+  
DC  
Motor  
A
A
SA/CDCMA  
SB/LSOUT1  
B+  
B
ADCMB  
BDCMA  
BPWM  
CPWMA  
CPWMB  
Step  
Motor  
C
DC  
Motor  
B
B
SB/LSOUT2  
SA/CDCMB  
A
BDCMB  
GND  
DGND  
Figure 1. 34921 Simplified Application Diagram  
*This document contains information on a product under development.  
Specifications and information herein are subject to change without notice.  
© Freescale Semiconductor, Inc., 2005. All rights reserved.  

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