MC33486

This device is a dual high side switch for automotive applications which incorporates a dual low side switch control feature. This device is designed to monitor two low side switches for typical DC-motor control in an H-Bridge configuration. It can be directly interfaced with a microcontroller for control and diagnostic functions, is PWM capable and has a self-adjusted switching speed for minimizing electromagnetic emission.

The High Side block incorporates two 15mΩ Rdson N-Channel power Mosfets with senses and a control circuitry. Each output of this high side block is protected against short to gnd and load shorts, and has over temperature detection with hysteresis. It includes a current recopy feature for monitoring the load current. The control circuitry also has an overvoltage detector which turns off the bridge and protects the load in case of Vbat exceeding 28V.

The low side control block is able to drive 2 low sides switches in a H-bridge configuration and protects them in case of short circuit. This, in combination with the High side protection, fully protects the H-bridge from shorted loads, shorts to Vbat and shorts to GND.

This device offers a very low quiescent current in standby mode.