PI7VD9401FDE

The PI7VD9401FDE is an integrated, high voltage, high current Dual High-Side Switches designed for automotive applications such as HVAC systems. It combines two N-channel MOSFETs optimized for low Ron and low current consumption, with protection against overcurrent, over-temperature and load dump events. It integrates a set of logic and an onboard microcontroller to provide an interface for load switching, status sensing and FET diagnostics.

Application Field of PI7VD9401FDE

The PI7VD9401FDE is suitable for a variety of high voltage, high current applications that require a low-cost, compact solution. Its protected high-side switch architecture is well suited for automotive HVAC systems, as well as industrial, domestic appliance and lighting applications.

Specifically, automotive HVAC systems such as door-mounted air vents and centre consoles. The PI7VD9401FDE can be used to control the 6V DC fan motor, as well as the cabin air temperature. It is also used in opening and closing remote window motors, as well as controlling the power level of high power devices like wiper motors and headlights.

In industrial applications, it can be used to control heavy machinery and equipment. It is suitable for switching high voltage power lines, controlling automation presses and controlling the flow of fluids such as oil and water. In household appliances, it can be used to control washing machine motors, microwaves and ovens.

Working Principle of PI7VD9401FDE

The PI7VD9401FDE is an integrated high-side switch designed to provide protection against overcurrent, over-temperature and load dump events. It is composed of two N-channel MOSFETs connected in a half-bridge configuration, as well as an embedded microcontroller. The microcontroller is responsible for providing a safe switching operation of the MOSFETs, as well as diagnostics and fault detection.

The PI7VD9401FDE provides an interface for digital control, as well as analog signals for devices like thermistors. It also supports configuration via pulse-width modulation (PWM) for controlling fans and dimming lights. The onboard microcontroller can also detect malfunctions in the system and provide over-temperature and over-current protection.

The PI7VD9401FDE is also able to detect voltage drops in the MOSFETs and provide a fault indication. It supports a maximum operation voltage of 48V, with a typical on-state resistance of 0.23 Ohms, and a maximum continuous current of 20A.