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Both circuits will not work in continius mode because of bootstrap capacitors have to be charged only in pulse mode. So, the upper transistors should heat a lot in your case.
The problem is that you have to continously pulse the Vs terminal of the driver to pump up the bootstrap capacitor before there is enough volts on the line to turn the upper FET on. I doubt if push buttons would ever work.
Frank
I was wondering if you shunted the FETs with a 1K resistor, so when the low side FETs turned on the Vs (1/2 Vcc) dropped to 0V, so a little charge went into the bootstrap but you will need to do it a lot before it has enough volts on it to turn the top FETs on. One pulse from a switch would not work!
Frank
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