• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 32 subscribers
  • Views 721 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

TUSB320: DRP Mode Help Please..

Vision4u
Prodigy 240 points
Part Number: TUSB320
Other Parts Discussed in Thread: BQ25890, , TPS25910

Dear TI Team ,

 

I will apreciate if you can check if the circuit is functioning properly with the USB Type C connector standards please. I am kinda confused on how to proceed at some points .

 My aim is to configure the port of USB C in DRP mode .

 I have attached a scheme which shows the flow chart of the Power Multiplexer section.

 

In the system design , there are 3 source of input available. I have an Aux input connector which is 5V0_in , Vsys _Backup (4.4Volts) output from BQ25890 Battery Charge Management IC ,   5 Volt Dc Power that can be fed from the connected USB C connector , 5V_USB.

 

 Question 1, is the below scenario working for DRP?

 

When a host is connected at   USB C connector , we have the TUSB320 detecting CC lines , getting TUSB_ID LOW and TPS25910 drives 5 Volts with MAx 3A to the host if there is power available in the AUX connector which is 5V0_in.

 

At this point Do I have to also send the TUSB_ID signal from TUSB320 to the ATSAMV71Q21Processor?

 If the Aux Power is not available in Aux connector, The BQ25890 will start powering the VCC_P5v0 net from the mosfet IC6 IRLML6402.

 

Question 2,

 Should i also send power up to Connected USB Host with the 4.4 volts output from BQ25890 when there is no Aux Power available?

 

 Question 3 ,

 Are the schottky diodes U11-U12 positioned properly for the DRP mode and the power scenarios explained above?

  • 0
    TI__Guru** 119940 points

    1; when TUSB320 is connected to a host, then TUSB320 is used as UFP and get 5v from the vbus of the host. Id pin don't care at this moment.

    2: when a device is connected to the type c connector , TUSB320 is used as DFP, then you can choose one of the 5v supply which can be controlled by ID pin.