High Side Switch Controller

The n channel power mosfets typically have one third the on resistance of p channel mosfets of similar size and cost.

High side switch controller.

This requires both a robust low on resistance power switch and accurate analog circuitry for diagnostic protection and control functions. A power good output indicates the status of the process side power supply. Typically these use a pnp bjt or p channel mosfet. The max14922 device controls an external nmos power transistor allowing low r on high side switch applications from a 9v to 70v supply range.

The galvanic isolated octal high side smart power switch enhances diagnostics and system management by providing a 20 mhz spi port allowing both per channel over temperature signalization and efficient daisy chaining of multiple devices. This transistor connects between v and the load. The max1614 drives high side n channel power mosfets to provide battery power switching functions in portable equipment. The device enlarges st s family of galvanic isolated high side switches.

Because of how transistors work these can be a little more difficult to use in an arduino or raspberry pi circuit. High side switches can safely drive high currents into complex resistive inductive and capacitive grounded loads in compliance with the harsh automotive environment. They belong to an expanding family designed to control protect and diagnose various types of loads with enhanced precision in bcm ecu or junction boxes.