This is a internal circuit of PSS30S71F6and datasheet is attached. I would like to ask you what are Vufs (1) and Vufb (3) pins for? This pins are keep burning for a reason but i haven't figured it out.


1 Answer 1


Vufs (1) and Vufb (3) pins are used for "bootstrapping" circuits (diode +Capacitors).

See figure 6 of datasheet + remark (7).

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  • \$\begingroup\$ What kind of things might cause Vufs and Vufb pins explosion? It's happen one in every 20-30 circuits \$\endgroup\$
    – wolyure
    Mar 17, 2023 at 6:32
  • \$\begingroup\$ Don't know. Are PSS3071F6 anymore usable? \$\endgroup\$
    – Antonio51
    Mar 17, 2023 at 10:52

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