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MC34923 - Full-Bridge PWM Motor Driver

General Description

Freescale Semiconductor, Inc Pin 1 2 3 4 5 6, 7, 18, 19 8 9 10 11 12 13 14 15, 22 16 17 20 21 23 24 Pin Name VB CP2 CP1 DIR OSC GND VDD PWM/ENABLE DATA CLOCK STROBE VREF PWMMODE NC DCMA SENSE VBB DCMB SPAN VREG Formal Name Boost Voltage Switching Capacitor 2 Switching Capacitor 1 Direction Oscil

Key Features

  • ±2.0 A, 45 V Continuous Output Rating.
  • Low RDS(ON) Outputs (270 mΩ, 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 34923 FULL-BRIDGE PWM MOTOR DRIVER Freescale Semiconductor, Inc DW SUFFIX 24-LEAD SOICW CASE 751E-04.

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Full PDF Text Transcription (Reference)

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www.DataSheet4U.com Freescale Semiconductor, Inc. MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document from Analog Marketing: MC34923/D Rev 0, 05/2003 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.