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TPD2S300: Vconn current

Takashi Yamaguchi
Genius 11570 points
Part Number: TPD2S300
Other Parts Discussed in Thread: TPD6S300, TPD6S300A

Hi team,

I have a question about the TPD2S300.

I’m proposing the TPD2S300 to my customer, but they are concerned about the following two things.

 

  1. Vconn current is small
  2. Canon has not yet examined the concern of the voltage that appears on the system side during the transient state until the protection is triggered when VBUS=15V to 20V.

 

 For the #1, the Vconn current of the TPD2S300 is 200mA (max). Is the 200mA enough for driving E-marked cable? It seems that the TPD6S300 can output the Vconn current up to 600mA(max). Could you tell me the reason why the Vconn current of the TPD2S300 is lower than the TPD6s300?  The d/s of TPD2S300 describes that “VCONN provider must be able to provide 1 W of power to a cable”. Therefore, does the TPD2S300 set the Vconn to 5V/200mA?

 

For the #2, from the TPD2S300 d/s, the OVP response time (tOVP_RESPON SE_CC) is 145ns(typ). I believe that the competitor is NX20P0407. The response time of NX20P0407 is 60ns(typ). Do you have any test data which shows CC pin can be protected from the over voltage(15V to 20V) even 145ns response time?

Regards,

Yamaguchi

  • 0
    TI__Genius 9630 points

    Hi Yamaguchi-san,

    1. The VCONN current of 200mA is enough to drive an E-marked cable, depending on the application. The USB Type-C spec goes into further detail on VCONN current for application. The TPD2S300 does not set VCONN, as the DFP is responsible for providing VCONN. The TPD2S300 passes through up to 200mA of current and has a low enough Rdson to not have significant current draw. I would recommend using the TPD6S300A instead so that you can have a VCONN current of up to 600mA.

    2. Yes Figure 2 and Figure 3 of the datasheet have this test data. 

    Thanks,

    Emma