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Question about issue of ADG453 related power supply condition

Question asked by Se-woong on Jun 30, 2015
Latest reply on Jun 30, 2015 by paul.osullivan

Hello,

 

My customer uses ADG453 supplying +12V (DP12V) at VDD and -12V (DN12V) at Vss like below schematic.

And when -12V trip out, L2 is damaged and ADG453 become hot.

At this time, current of L2 is 1.25A.  (At normal operation, current of L2 is 0.08A.

 

Q1) Would you confirm the power supply circuit in above schematic?

 

Q2) Would you let me know why L2 and ADG453 is damaged when  -12V trip out?

       Or would you confirm the power supply circuit in above schematic in case of removing -12V part?

 

Please advise me.

 

If you have any questions, please let me  know.

 

Regards,

Se-woong

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