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WEN-YUNG
Level 3
Level 3
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Hello IFXer,

I have question about 1ED31xxMC12H.

With bipolar supply 15V / -8V design, 

1. the transformer need use center tap for bipolar supply voltage?

2. could you help us to provide the reference design for iso-power?

3. the VEE2 has absolute maximum ratings? if reference center tap.

WENYUNG_0-1678176877955.png

 

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AZIZ_HASSAN
Moderator
Moderator
Moderator
500 replies posted 50 likes received 5 likes given

Hello,

Yes your understanding is correct. Ultimately, the difference in voltage should not be more than 40 volts maximum.

Thanks and regards,

AZIZ

 

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3 Replies
AZIZ_HASSAN
Moderator
Moderator
Moderator
500 replies posted 50 likes received 5 likes given

Hello,

1) Yes, since you need bipolar supply, center tap is ok. Please erefr point two link for schematics as a refernce.

2) PFA of link which have the schematic of isolated power design using flyback converter.

3) Sorry, I could not understand your point 3.

 

Thanks

AZIZ

https://www.infineon.com/dgdl/Infineon-AN2020-39_REF_62W_FLY_1700V_SIC-ApplicationNotes-v01_00-EN.pd...

 

 

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Dear AZIZ,

Thank you for replied.

For point 3, if the VEE2 reference to 0V and the Absolute voltage VCC2 rating is shift -8.3V to 32V, right? I there any other parts I haven't considered? 

 

WENYUNG_0-1678287315667.png

 

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AZIZ_HASSAN
Moderator
Moderator
Moderator
500 replies posted 50 likes received 5 likes given

Hello,

Yes your understanding is correct. Ultimately, the difference in voltage should not be more than 40 volts maximum.

Thanks and regards,

AZIZ

 

0 Likes