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design of gate drivers - askingfor advice

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enea

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design of gate drivers

Hi,
I need to design the gate drivers for the 2 swiches (S1 and S2) on the secondary side of this circuit.

They are two bi-directional switches with this topology.
43_1226396958.jpg

The source potential is floating so I need a supply that gives the needed voltage (in this case 10-12V) referenced to this potential. The question is if I have to use two different supply for S1 and S2 or if there is a way to use only one supply for the drivers.

Thank you.
Enea
 

garat_k

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Re: design of gate drivers

I think you can use same gate drive circuit which is being used for inverter switching.
For IGBTD and IGBTD2 use two isolated supplies,and for IGBTD1 and IGBTD3 you can use one supply whose ground is common with Vdc ground.
 

enea

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Re: design of gate drivers

For the H-bridge I thought about using two high-low side drivers which use a bootstrap circuit. My question was about the drivers for the switches S1 and S2.
 

darla1

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Re: design of gate drivers

hello

u can use pulse transfromer for this gate drive circuit...if need full deatils me me

darla
 

enea

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Re: design of gate drivers

yes i also thought about using a pulse transformer with two outputs isolated from each other and to make it simpler i decided to use two isolated dc/dc converter from TracoPower which are small and efficient.
 

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