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Full Bridge SMPS, 125kHz, with High side bootstrap drive

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cupoftea

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Hi,
Would you say the LTC4440 would be OK to use with a 125khz LTC3723-1 based full bridge for hi side bootstrap drive?
Spec is 300w, 10-36vin, 32vout. 125khz.

Its odd that the LTC3723-1 datasheet only lists pushpulls in the examples pages....after all pushpull is a lousy topology that lumps you with twice vin on the primary fets, and a relatively higher leakage inductance induced overvoltage ring than full bridge.......so, in LTC3723-1 datasheet, why no full bridge's shown with their LLTC4440 driver?

LTC4440

LTC3723-1
 

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Last edited:

LTC3723 datsheet states "Supports Push-Pull, Full-Bridge, Half-Bridge, and Forward Topologies"
If you have doubts about bootstrap driver suitability, it shouldn't be specfic to LTC3723.
 
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