I found the question that explains logic supply voltage (VDD, VSS) and gate drive supply voltage (VCC) are not isolated. And according to datasheet reference circuit, it seems to be non-isolated between hi-side and low-side supply voltage. So I guess IR2110 can be used with only one voltage source, even though it come form main supply(eg. high side mosfet drain), assuming that I use voltage divider.

Then I have question. When I compose full bridge with two IR2110, can I supply two IR2110 with one voltage? If not, what supply voltage need isolation?

I have rectified AC220(DC 310V). and isolated 5V. If I cannot use IR2110, how can I compose full bridge?

  • \$\begingroup\$ "So I guess IR2110 can be used with only one voltage source" - look at page 1 of your linked data sheet - how many voltage sources can you spot? \$\endgroup\$ – Andy aka Jun 11 at 9:46
  • \$\begingroup\$ Just out of curiosity and some vague concerns (based on seeing 500V and 600V on the datasheet): What voltages are you planning to use in your design? \$\endgroup\$ – Oldfart Jun 11 at 9:53
  • \$\begingroup\$ I can use 1 voltage source except main source, and isolated. It is 5V. Can I compose full bridge? and main voltage is 310V(rectified AC220). \$\endgroup\$ – yang Jun 11 at 10:29

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