SBAS21DW5T3G

Introduction

The diodes - rectifiers - arrays are devices that are designed to rectify the current flowing through them. In this article, we will discuss one of these rectifiers, the SBAS21DW5T3G as an application field, as well as its working principle.

Application Field

The SBAS21DW5T3G is a high-speed, half-bridge rectifier array with an integrated high-side switch. It operates at 8A, making it suitable for automotive and hybrid electric vehicle applications. Its wide input range (3-60V) allows for applications that require higher voltage levels. It has strong surge properties and can handle up to 30V transients.

The SBAS21DW5T3G is also suitable for use as a rectifier in power supplies, inverters, motor controllers, and many other switched mode power systems.

Working Principle

A rectifier is a device that converts alternating current (AC) to direct current (DC). The SBAS21DW5T3G rectifier array uses two lateral MOSFETs and two parasitic diodes to convert the AC power, generated either by a source side or a load side, into DC power.

The two MOSFETs, which are connected in parallel, act as a voltage-controlled switch. When the device is powered on, the MOSFETs turn on, leaving the parasitic diodes acting as a reverse-blocking diode. When this diode is enabled, it rectifies the AC signal, allowing current to pass through while blocking reverse current.

The switch from on to off cycle is also controlled by applying gate signals. As the gate signals change amplitude, the signal can either be passed or blocked, allowing for a full-wave rectification.

Conclusion

The SBAS21DW5T3G is a high-speed, half-bridge rectifier array with an integrated high-side switch. Its wide input range and strong surge properties make it suitable for automotive and hybrid electric vehicle applications, as well as many other switched mode power systems. Its working principle shows that it can convert an AC signal to DC power with the help of two lateral MOSFETs and two parasitic diodes.