LM74670-Q1: Avoiding a diode drop on full bridge rectifier?

Julio Apps

Expert 3665 points

Part Number: LM74670-Q1

Hello team,

Are you able to rotate the fet's on the second half of this rectifier to avoid a diode drop of the fets?

over 5 years ago

0 Lokesh Ghulyani over 5 years ago

TI__Expert 8630 points

Hello Julio,

We are looking into this and will get back in couple of days.

0 Lokesh Ghulyani over 5 years ago in reply to Lokesh Ghulyani

TI__Expert 8630 points

Hello Julio,

LM74670-Q1 turns-On the MOSFET when drop across body diode of the MOSFET increses above 0.48V. SO the the drop across any branch of the rectifier will not increase beyond 0.48V and then MOSFET would turn ON. Please see section 8.1.2.3 and 7.4.2 in the datasheet.

Once the conduction starts through the MOSFET , LM74670-Q1 will turn-off the MOSFET in case of reverse current.

0 Lokesh Ghulyani over 5 years ago in reply to Lokesh Ghulyani

TI__Expert 8630 points

Hello Julio,

I am closing this thread, if you have any further queries, please feel free post on this thread or open a new thread on E2E.

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LM74670-Q1: Avoiding a diode drop on full bridge rectifier?