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matianfu
matianfu
Associate
November 3, 2020
Solved

Could TCPP01-M12 be used without the N-MOSFET?

  • November 3, 2020
  • 1 reply
  • 835 views

We have a wide-input power management ic with buck-boost converter. 28V VBUS is not a problem. So is it possible to eliminate the N-MOSFET (at least in Sink mode)? If it is OK, what is your recommendation for connections of IN_GD, Gate, and Source pin?

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Best answer by MROUV.1

Hello,

To disable Vbus OVP (when DC/DC on Vbus is 25V compliant), you need to:

  • Remove MOSFET on Vbus
  • NC : SOURCE (4), GATE (5)
  • IN_GD (8) : connected to 100nF
  • VBUS_CTRL (6) : connected to GND

See X-NUCLEO-USBPDM1 modification.

Regards,

0693W000007CfR5QAK.jpg

1 reply

MROUV.1
MROUV.1Answer
ST Employee
January 26, 2021

Hello,

To disable Vbus OVP (when DC/DC on Vbus is 25V compliant), you need to:

  • Remove MOSFET on Vbus
  • NC : SOURCE (4), GATE (5)
  • IN_GD (8) : connected to 100nF
  • VBUS_CTRL (6) : connected to GND

See X-NUCLEO-USBPDM1 modification.

Regards,

0693W000007CfR5QAK.jpg

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