●Description
●Designed for bidirectional pulse width modulated (PWM) current control of inductive loads, the A4973 is capable of continuous output currents to ±1.5 A and operating voltages to 50 V. Internal fixed off-time PWM current-control circuitry can be used to regulate the maximum load current to a desired value. The peak load current limit is set by the user’s selection of an input reference voltage and external sensing resistor. The fixed off-time pulse duration is set by a user- selected external RC timing network. Internal circuit protection includes thermal shutdown with hysteresis, transient-suppression diodes, and crossover current protection. Special power-up sequencing is not required.
●Features and Benefits
●▪ ±1.5 A continuous output current
●▪ 50 V output voltage rating
●▪ 3 V to 5.5 V logic supply voltage
●▪ Internal PWM current control
●▪ Fast and slow current-decay modes
●▪ Sleep (low current consumption) mode
●▪ Internal transient-suppression diodes
●▪ Internal thermal shutdown circuitry
●▪ Crossover current and UVLO protection
