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Depending on the min PWM of the low side, 220nF-470nF will be OK for the bootstrap caps, 10 ohm for the gate drive res, diodes = schottky 45V 1A, 1uF for the de-coupling caps in the chip.
Regards, Orson Cart.
Vb is the generated bootstrap voltage , if you leave it open the high side mosfet can't work.
The Vcc is the power supply of the logic control circuit, this controls the operation of the output stage,
why would you remove that?
But i already did....
The Vb is connected to the bootstrap diode and capacitor and is the bootstap voltage input,
then this voltage is used internally for the mosfet driver stage,
if this voltage is not connected then the high side mosfet driver can't drive the mosfet.
The Vdd and Vss are the positive supply and ground of the digital control circuit of the chip,
if you don't provide these then the output stage can't be controlled.
Yes sorry, Vdd is power supply of the digital control circuit ,
Vcc is the positive supply of the output stage.
I'm used to having Vcc as power supply in digital ic and i have mixed them up.
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