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Vbus +5V

FAnag
Associate

‎2019-06-25 01:04 AM

Hi

I plan to include the USB input of STM32F303 and am not willing to power up the board with the +5V of Vbus. The board will be supplied permanently with 3.3V. Is it necessary the connection of Vbus? If yes how i should connect it to the +3.3V Vdd of STM32?

Thanks

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3 REPLIES 3
Uwe Bonnes
Principal II

‎2019-06-25 01:20 AM

You need VBUS to detect USB-plutg/unplug.

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FAnag
Associate

‎2019-06-25 02:36 AM

Thanks.

So i should use one of the many circuits i found in Google, e.g. this with the FET that is connected among +3.3V Vdd ---> Res 1.5K----> D+ input with its gate driven by the Vbus +5V ? Is that OK?

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