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I should need a driver of a PMOS NMOS bridge with dead control controlled by a one line from the microcontroller (because I have to use several PWM lines) that inserts a dead time control to avoid both mosfets conducts at the same time. The diagram is this: PMOS-NMOS driver

I wondered to do this because I do not need floating power supply and there are P-MOS 3x3mm that conduct 64A like NVTFS9D6P04M8L

mathengineer
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  • So what you are asking for is someone to find a driver that supports PMOS/NMOS with dead time control with one signal in? Why not use two standard driver with an inverter and a buffer connected to the same PWM signal from the µC? or just use two NMOS ? – user103776 Aug 18 '20 at 09:32
  • Because I want have dead time control to avoid both mosfets be switched at the same time and also drive 100% duty cycle, that is not possible using bootstrap. Using two N mosfets in the past was a good idea because it didn't exist any good P-MOS but there are very good now. NOTE: connect an inverter and a buffer to N and P mosfets IS A VERY BAD IDEA because you activate both mosfets at the same time making short circuit – mathengineer Aug 18 '20 at 10:31
  • you can choose a driver with integrated deadtime control I missed that little thing out – user103776 Aug 18 '20 at 11:12

1 Answers1

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From a comment by the OP: -

I want have dead time control to avoid both mosfets be switched at the same time and also drive 100% duty cycle

Use an anti-shoot-through logic circuit like this: -

enter image description here

This is suitable when the top MOSFET is P channel and the lower MOSFET is N channel. The dead-band produced is roughly capacitance x resistance. Use Schmitt trigger input devices.

For converting to a 12.5 volt rail, there are plenty of MOSFET drivers to choose from made by the usual manufacturers.

Andy aka
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