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The soft start circuitry brings a pwm signal to both low side mosfets without taking in consideration the h bridge direction.
A shoot through the bridge. Then the delays between top and bottom turn on of each side of the bridge can be handled in software. Therefore the pwm circuitry is almost independent and offers a great flexibility to extended operations. Our anti shoot through design provides adequate protection to the mosfet h bridge during normal operation and guarantees a fail safe operation in case of severe noise interference or a faulty. The low side and high side gate drivers are controlled by a single input signal to the pwm pin.
U1 is an h bridge driver ic. Hope this helps somewhat andras tantos. The timing of the inputs will prevent any shoot through current. The mic4102 implements adaptive anti shoot through circuitry to optimize the switching transitions for maximum efficiency.
The shoot through circuitry then generates the proper low side command in order to avoid any conflict. The transistors are n channel mosfets. This could happen if at least one of the fets dont close fully which could happen especially on the high side if your drive circuitry cant provide a high enough vgs in your case around 15v. Vbatt is a 148v lithium battery.
The mic4102 is a high frequency 100v half bridge mosfet driver ic featuring internal anti shoot through protection. The circuit provides brake feature when the output of both gates are the same either high or low. Another possibility is that you create shoot through in the bridge effectively shunting your motor out. Cause of shoot through in h bridge.
Unfortunately when i plug in the battery one of the transistors goes pop instantly and shorts across itself. If driving an h bridge from a microcontroller it is much better to use four port pins.
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