Full Bridge Mosfet Driver

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DRV8701 Brushed DC Motor Full-Bridge Gate Driver 1 Features 2 Applications 1• Single H-Bridge Gate Driver • Industrial Brushed-DC Motors. The DRV8701 is a single H-bridge gate driver that – 6-mA to 150-mA Source Current uses four external N-channel MOSFETs targeted to.

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I have a full bridge MOSFET driver driver driving a full bridge. After some experimenting with the circuit prototype i found out that the driver heats up to over 60 °C after a short while of running, which concerned me but it worked fine. However as I decreased impedance across the load (which was originally connected to primary coil of a transformer) the driver started acting in a weird way and i found out that it has blown out.

This is already the second driver i destroyed this way and they're expensive as hell, so I need a solution. I think what's causing the driver to blow out is that when I decrease impedance across the load I basically create a short circuit between the driver's bootstrap pin and ground, which kills it. By adding a resistor across the load or the whole bridge and ground, I could easily solve the issue, however I do need low impedance on the load because I need high current (up to 20A).