About micro USB connection of PD compatible terminal

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hata_3396041
Level 4
Level 4
First solution authored First like received 50 questions asked

Hello

It would be very helpful if you could get an answer as soon as possible.

Please tell me about the Source board that supports USB-PD using CYPD3196-24LDXS.

The connection destination is a smartphone or tablet, and the original plan was to connect only to Type C.

However, the specifications have changed and it is now connected to Micro USB.

(In this case, I want to exchange data without supplying power)

●5V line FET SW does not turn on with CC PU and PD alone (VBUS-P-CTRL does not output L)

 The timing when the FET turns on is after the CC communication (negotiation) is completed.

 Therefore, the FET does not turn on when connecting to the micro USB.

Is my understanding correct?

Best Regards

Hayato

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1 Solution
Abhilash_P
Moderator
Moderator
Moderator
50 likes received 500 replies posted 250 solutions authored

Hi,

    Q1:"The source board which supports CYPD3196-24 LDXS"

     CCG3PA Automotive solution.

     Q2: "5V line FET SW does not turn on with CC PU and PD alone (VBUS-P-CTRL does not output L)

         The timing when the FET turns on is after the CC communication (negotiation) is completed.

         Therefore, the FET does not turn on when connecting to the micro USB"

          Not exactly. As soon as you connect the USB cable, a 5V is seen on the Vbus for enumeration if you have made the necessary changes by adding the termination resistors on CC line to convert from type C to legacy micro B connector. Please refer the KBA Termination resistors for Type C to legacy ports  ​to verify if your circuit connection is right.

Please share the block diagram of your circuit connection which is used for converting to legacy port so that we can confirm if the circuit works fine.

Regards

Abhilash P

View solution in original post

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2 Replies
Abhilash_P
Moderator
Moderator
Moderator
50 likes received 500 replies posted 250 solutions authored

Hi,

    Q1:"The source board which supports CYPD3196-24 LDXS"

     CCG3PA Automotive solution.

     Q2: "5V line FET SW does not turn on with CC PU and PD alone (VBUS-P-CTRL does not output L)

         The timing when the FET turns on is after the CC communication (negotiation) is completed.

         Therefore, the FET does not turn on when connecting to the micro USB"

          Not exactly. As soon as you connect the USB cable, a 5V is seen on the Vbus for enumeration if you have made the necessary changes by adding the termination resistors on CC line to convert from type C to legacy micro B connector. Please refer the KBA Termination resistors for Type C to legacy ports  ​to verify if your circuit connection is right.

Please share the block diagram of your circuit connection which is used for converting to legacy port so that we can confirm if the circuit works fine.

Regards

Abhilash P

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Thank you very much.

First talk to the customer about the spec and share the circuit if needed.

Best Regards

Hayato

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