I´m designing an application that has to control a resistive load with an H-Brige activated by two ADuM7234:
- Maximum voltage 200V.
- Frequency around 1Mhz
- Resistive load 10 Ohm´s
I´m following the document http://www.analog.com/static/imported-files/tech_articles/Inside_iCoupler_Technology_Driving_an_H_Bridge.pdf
And I have some questions that I would appreciate if someone can help me to clear it out:
- For small loads I red that the optional resistor at the gates of the MOSFET could help to avoid ringing, which value do you suggest?
- The Vgs voltage that is set at VDDB(in the pointed document 15V) how much current could need, any idea how to calculate that?
- I´m planning to have the system separated in two boards, one the H Brige and the other with the gate drivers and the components required(SMD),
could it be a problem to extend the MOSFET gate inputs over a BUS cable to the SMD board?
Any remark would be really appreciated.