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shainajkumar
Active Contributor

Join Date: Sep 2007
Posts: 15

Drop less rectifier

04/20/2008 7:38 AM

Main disadventage of diode rectifier is heat and energy loss. If we use low rdsOn MOSFET instead of diode with proper gate drive we can safe energy droped in diode as well as reduce heat. Also we can avoid heatsink for diode
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user-deleted-1105
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Popular Science - Weaponology - New Member United Kingdom - Member - New Member

Join Date: May 2007
Location: Harlow England
Posts: 16512
Good Answers: 670
#1

Re: Drop less rectifier

04/20/2008 8:42 AM

Mosfets can fail for no apparent reason and are very susceptible to voltage spikes...eg. from static discharge

Reliability would be a problem...I'd think.

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ffej
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Join Date: May 2007
Location: Geelong, Australia
Posts: 1084
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#2

Re: Drop less rectifier

04/21/2008 1:28 AM

It's called "Synchronous Rectification" and is used everywhere. The rectification MOSFETs are also switched to lower inrush currents and reduce electrical noise.

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You might be interested in: RF MOSFET Transistors, Rectifier Diodes, Power MOSFET

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