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.

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