Dual H-bridge driver for permanent magnet DC motor in automotive applications

Dual H-bridge driver for permanent magnet DC motor in automotive applications

This AEC-Q100 automotive qualified ASIC contains a dual H-bridge driver for climate control applications. The driver controls the permanent magnet DC motor of the air-conditioning fan speed in a car. The IC can be used for pulse count and potentiometer feedback systems with permanent magnet DC motors. In pulse count applications, the IC detects the DC motor commutation pulses and creates a pulse for every detected commutation pulse. These pulses can then be fed back to a microcontroller for position sensing and control.

FEATURE

  • 2 H-bridge drivers with over-current detection and protection
  • Mode selection circuit for the half-bridges in parallel versus sequential mode
  • Pulse detection circuit, one per H-bridge with programmable threshold levels
  • Power on reset (POR) and over-voltage shutdown circuitry
  • Thermal shutdown circuitry
  • Low quiescent current state
  • Junction temperature: -40°C to 150°C
  • 0.7um CMOS 100V technology