gate drive design for mosfet

[ra124]

hi
i need to design half bridge switch using mosfet for half bridge dc-dc converter so i need sum guide lines like what are the design considerations n requirements n gate drive circuit to drive half bridge mosfet..........

 

[crutschow]

The drive requirements are determined by the gate charge required to charge the gate capacitance and turn the transistor off and on at the rate you require. The gate charge value (in coulombs) is usually stated in the MOSFET data sheet. Given that, and the turn-on time you need, you can determine how much gate drive current is required to charge and discharge the capacitance (current = charge ÷ time)

 

[ra124]

thanks........ can i use tc4426 to drive half bridge mosfet which is used in SMPS

 

[shortbus=]

thanks........ can i use tc4426 to drive half bridge mosfet which is used in SMPS

No, I don't think that will work. It's a dual low side driver.

I think you need something like this;
https://www.electro-tech-online.com/custompdfs/2009/11/ir2110.pdf Or one of the other half-bridge drivers.

Cary

 

[nickelflippr]

thanks........ can i use tc4426 to drive half bridge mosfet which is used in SMPS

A TC4428 would work if you use a pfet for the high side switch, and an nfet for the low side.

 

[maicael]

Come to think of it can the ir2110 function effectively as a dual low side driver and work in a push pull configuration since it is faster than the tc427 driver

 

[maicael]

Come to think of it can the ir2110 function effectively as a dual low side driver and work in a push pull configuration since it is faster than the tc427 driver

 

[alec_t]

That should work ok.