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SiC MOSFET driving method

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abhishek.2138

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I am working on onboard charger project for electric vehicle of 11kW rating.
In that I considered UCC21750-Q1 SiC MOSFET driver. (Datasheet attached)

I have query that which MOSFET driving method is suitable bootstrap or zener diode method (negative bias supply)?

What are the pro & cons of bootstrap method over negative bias zener diode method for driving SiC MOSFETs?
Can negative bias be generated by bootstrap method for SiC MOSFETs?

For PFC -
Input = 415 VAC, Freq = 50 Hz
Output = 650 to 800 VDC @ 11kW

For High voltage DC converter -
Input = 650 to 800 VDC
Output = 200 to 450 VDC @ 10kW

For Low voltage DC converter -
Input = 200 to 450 VDC
Output = 9 to 16 VDC @ 3kW

Regards,
Abhishek
 

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  • UCC21750-Q1.pdf
    2.1 MB · Views: 115

Wow - you really have a hill to climb with this project .....

2 zeners can provide +18V and -4v7, with the mid point being the 0v source connection ( do i really need to spell that out ? )

a charge pump off the 18V, cap limited, can provide the -4v7 that the zener limits ...
 
Hello,

Thanks for reply.
But which driving method is more suitable with bootstrap or without bootstrap?
Can u pls suggest pros & cons of these two MOSFET driving methods?
Topology used in dual active bridge.
 

It's not clear what you mean by "bootstrap or zener diode method". These don't sound mutually exclusive, and they only describe minor aspects of the gate drive.
 

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