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[ADuM7223]How to design High-Side voltage when MOSFET gated 200V?

Question asked by sofy Employee on Aug 13, 2015
Latest reply on Oct 18, 2017 by accstrmtrpr

Hello,

I would like to know about H-Bridge driver circuit with using ADuM7223.

According to

https://ez.analog.com/message/129916#129916

I understood VDDA and VDDB should be separate supply, but I cannot find any reference circuit.

I also refer to

http://www.analog.com/static/imported-files/tech_articles/Inside_iCoupler_Technology_Driving_an_H_Bridge.pdf

Is there any information how to VDDA supply when Vbridge voltage max 200V? (This apps note Vbridge is about 16V.)

 

Actually, one customer had designed with following above pdf Fig.1 with using ADuM7223 instead of ADuM7234 and Vbridge is 200V.

But High-side voltage output is only about 5V instead of 200V.

 

Thank you for your help in advance.

Best regards,

Sofy

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