• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 30 subscribers
  • Views 228 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

AWR2243: Cascade board (RF+DSP) power problem

bo yang99
Prodigy 120 points
Part Number: AWR2243

Dear Ti:

     In the AWR2243 four chip cascade EVM board (DSP+RF) of TI, there is a 5V to 3.3V power supply chip (TPS73733Q) on the RF board. The DSP board card also provides 5V and 3.3V for the RF board card through the J1 connector.

 

My question:

1、I want to reduce the size of the RF board. If only DSP+RF-EVM boards are used together, can the chip  (TPS73733Q) be removed?

2、The baseplate can provide 5V and 3.3V. Why is the 5V of the baseplate sent to the chip to generate a new 3.3V, and the new 3.3V is connected with the 3.3V of the baseplate?

Looking forward to your reply. 

Thank you

  • 0
    TI__Genius 13805 points

    Hi,

                  Please find my comments below.

    1. If you mean you plan to bring DSP and AWR device on same board(PCB) then you can plan your power topology accordingly. The 3.3V LDO is needed for VIOIN supply. The input of it can be planned according to your power topology system. 

    2. the 5V is not sent to chip. It is being fed to LDO to generate the VIOIN supply of 3.3V for AWR set of devices. Secondly, this LDO being enable controlled from PMIC ensures that the power supply sequencing of all the rails if ascertained for AWR devices.

    Regards