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7/8/2017 7:14 PM
 

We use MP24943(SOCIE8) to convert 48V into 12V.After power up,the MP24943 is distroyed at once.Below is our schematic.What's wrong with ours?Mistake with the pin 'EN' of MP24943? Without B560C(now it is not mounted)?

MP24943 Schematic.png

Thanks,

James

 
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7/10/2017 9:58 AM
 

Hi James,

 

The diode (B560C) is a must have component for this buck regulator. Without this diode, the inductor will not be able to discharge its energy when HS FET turns off. It acts like an open circuit with energized inductor, and the inductor will arc to release the energy. The regulator may have been damaged due to the arcing. With the diode, the inductor current will be able to flow to output when HS FET is off.

 

Thanks,

Kevin

 
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7/14/2017 8:00 PM
 

 

We mounted B560C.The problem is solved.

 

Thank you, Kevin

 

 

James

 

 

 
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HomeHome Products Categ... Products Categ...DC-DC Power Con...DC-DC Power Con...MP24943 is burned downMP24943 is burned down