Question for CYPD4255-96BZXI Vconn Current

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cross mob
xizh_4275346
Level 1
Level 1

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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1 Solution
ShifangZ_26
Moderator
Moderator
Moderator
10 likes given 250 sign-ins 1000 replies posted

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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ShifangZ_26
Moderator
Moderator
Moderator
10 likes given 250 sign-ins 1000 replies posted

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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