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USB EZ-PD Type-C

New Contributor

Display cannot work when using our USB3.1 TypeC active cable to connect display and NB which uses CYPD4255-96BZXI as USB interface IC.  It seems that this NB limits the current of Vconn at startup stage. If over current detected, it will shutdown the power of Vconn. The inrush current of our Active cable is about 400mA.

Does CYPD4255-96BZXI  really limits the current of Vconn? If yes, what's the value of limitation current?

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Moderator
Moderator

Hi ,

1. You'd better to share the schematic of CYPD4155 to us to help you analysis the question.

2. If you are using internal VCONN FET for VCONN power, the maximum current is 300mA.

Best Regards,

Lisa

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1 Reply
Moderator
Moderator

Hi ,

1. You'd better to share the schematic of CYPD4155 to us to help you analysis the question.

2. If you are using internal VCONN FET for VCONN power, the maximum current is 300mA.

Best Regards,

Lisa

View solution in original post

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