UCC27211: Calculate the parameter of elements

Hi Bui,

Those components create a pnp turn-off circuit, and you could learn more about how it works from the following app notes:

• https://www.ti.com/lit/ug/tiducb6/tiducb6.pdf (Pages 6-7)
• https://www.ti.com/lit/ml/slua618a/slua618a.pdf (pages 19-20)

The parameters for the four components depend on your system parameters. The voltage rating should be greater than VDD, and the current rating should be enough to handle the source current of the FET being driven.

Thanks,

Rubas