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34921 Datasheet(PDF) 1 Page - Freescale Semiconductor, Inc |
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34921 Datasheet(HTML) 1 Page - Freescale Semiconductor, Inc |
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1 / 36 page  MC34921 Rev 5.0, 07/2005 Freescale Semiconductor Technical Data © Freescale Semiconductor, Inc., 2005. All rights reserved. *This document contains information on a product under development. Specifications and information herein are subject to change without notice. Configurable Motor Driver IC with Power Supplies 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. 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. 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 • Analog Quadrature Encoder • Pb-Free package is designated by suffix AE Figure 1. 34921 Simplified Application Diagram H-BRIDGE MOTOR DRIVER AND POWER SUPPLY 34921 ORDERING INFORMATION Device Temperature Range (TA) Package MC34921AE/R2 0°C to 70°C 64 LQFP-EP AE SUFFIX (Pb-Free) 98ARH98426A 64-LEAD LQFP-EP B+ B+ 34921 GATEOUT 5.0 V 3.3 V VCORE Serial Ports A/D Inputs SA/CDCMA SB/LSOUT1 SA/CDCMB SB/LSOUT2 B+ MCU 5.0 V / 3.3 V High-Side MOSFET B A A B Step Motor B+ MISO MOSI SCLK CE CPWMA CPWMB DC Motor ADCMA ADCMB APWM DC Motor BDCMA BDCMB BPWM DGND GND AN0 AN3 A B C |
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