H-Bridge Driver Circuit Using Isolated Half-Bridge Drivers Using ADuM3100 Digital Isolator

Application Circuit uses the ADuM3100 digital isolator is an H-bridge composed of high power switching MOSFETs that are controlled by low voltage logic signals. The circuit provides a convenient interface between logic signals and the high power bridge. The bridge uses low cost N-channel power MOSFETs for both the high and low sides of the H-bridge. The circuit also provides galvanic isolation between the control side and power side. The ADuM7234 is an isolated, half-bridge gate driver that employs iCoupler technology to provide independent and isolated high-side and low-side outputs making it possible to use N-channel MOSFETs exclusively in the H-bridge. This circuit can be used in motor control, power conversion with embedded control interface, lighting, audio amplifiers and uninterruptable power supplies (UPS)