MC34921

www.DataSheet4U.com Freescale Semiconductor Technical Data MC34921 Rev 4.0, 06/2005 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, overvoltage, 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 5.0 V / 3.3 V Serial MCU Ports A/D B+ B+ GATEOUT 5.0 V 3.3 V VCORE ADCMA Inputs A B+ B Step M...