This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TIDA-050047: PP5V and VIN 3V3

Part Number: TIDA-050047
Other Parts Discussed in Thread: BQ25672, BQ25792, USB-PD-CHG-EVM-01, , TPS25750

Hi team,

My customer would like to design a USB-PD system using tps25750d and bq25672 (or bq25792).

The configuration is close to the USB-PD-CHG-EVM-01(www.ti.com.cn/.../USB-PD-CHG-EVM-01).
But in the TIDA-050047,it is said that for a Sink-Only application, 5 V and 3.3V rail can be omitted.(page 7)

In that case, can we floating PP5V and VIN 3V3 pins?

In addition, it is sink-only from USB, if we don't connect USB and use battery to supply, are pp55v and VIN 3v3 need?

Thank you.

  • Hi,

    If the TPS25750 will be configured as a sink-only device, then yes you won't need PP5V or VIN_3V3. You may leave them floating, that should be fine. If you are using a battery and would like to power the TPS25750D then yes you can supply the VIN_3V3, but still not necessary. PP5V is only needed if you will be sourcing power to another device or to provide VCONN support.

    Typically, in sink-only applications, the PD controller will power up in dead-battery mode by receiving power from the port partner device on the other end of the Type-C cable via VBUS and then it will get the patch configurations from the Flash IC.

    Thank you,

    Hari