• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 64 subscribers
  • Views 697 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.

TPS65131: Application problem

Pok Man Leung
Prodigy 60 points
Part Number: TPS65131
Other Parts Discussed in Thread: PCM5102, , TPS7A49, TPS7A30

Dear Team,

I am a newbie in electronics. I apologise if my problem seems stupid.

First of all, I want to employ a positive and negative voltage output regulator for audio op-amp. I am using PCM5102 which provide output with voltage centered with GND. Can I use TPS65131 for this job?

Moreover, can I not putting the P-MOSFET which gate is controlled by BSW (pin7)? I will disconnect the input when the device is shutdown. I would not pull down the ENABLE pin for both positive and negative output. What will happen if I don't put this MOSFET in my design?

At last, due to the noise of a switching regulator, I am planning adding TPS7A30 and TPS7A49 beyond TPS65131. Would it fit my design regarding power supply(+10V and -10V for op-amps)? Thanks.

Regards,

Zeon

  • 0
    TI__Expert 6330 points
    Hi,

    I have notified our expert regarding this topic. Please expect a response by 2/12/19.

    Thanks,
    Aaron
  • 0
    TI__Mastermind 18550 points
    Hello,
    TPS65131 should be suitable for your application.
    You do not need to use MOSFET controlled by BSW pin. It is only needed if one wants to isolate input supply from boost output. If your application does not require this isolation, there is no need to use MOSFET switch.
    You should be able to use LDOs you mentioned to post regulate TPS65131 ouput to reduce noise. I do not see any problem with that configuration.

    Kind Regards,
    Liaqat