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Full-bridge transistor dead-time?

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dm927

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Does anyone know about how much dead-time would be needed between switching the two sets of transistors on a full-bridge inverter circuit?
 

dm927

New Member
I realize that Mosfet transistors have a tdelay(on), tdelay(off), and fall and rise time delays. In finding out the total switching time delay time of the transistors, would I simply add the tdelay(on) and the tdelay(off)?
 

mozikluv

New Member
rise and fall time

:D hi,

if you really want to know the rise & fall time, check the datasheet of the mosfet you are using. what are you trying to power up that speed of switching is imperative? :)
 

dm927

New Member
I am trying to power a full-bridge inverter. I have some delay time between switching, but the circuit shorts out when 100VDC is applied to the input rails. I just want to make sure the deadtime is enough.
 

Russlk

New Member
Since one transistor is turning on while the other is turning off, the difference in delay time is of concern, not the sum. Since the Td(off) is longest, usually, If you add Td(off) +T(fall) and double it for safety, that will be OK. Something in the order of 200 nS, probably.
 
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