• State Resolved
  • Locked Locked
  • Replies 6 replies
  • Subscribers 62 subscribers
  • Views 139 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.

Original question:

TPS62243-Q1: TPS62243-Q1 for CC2640

TPS62243-Q1: TPS62243-Q1 Buck coverter

Nivethitha D
Intellectual 320 points
Part Number: TPS62243-Q1

Hi, 

This is the circuit we are using to get 1.8V from TPS62243QDDCRQ1. But instead of  fixed 1.8V we are getting 2.3V. We are using 3V coin cell  battery. Why is it so and what are the steps to rectify it.?

Thanks,

Nivethitha D

  • 0
    TI__Genius 15020 points

    Hi Nivethitha,

    I would sugget first to isolate device from output and tried to measure the voltage. 

    Is it happening on certain devices? and can you share layout and waveform of Input output and Inductor current?

    Best regards,

    Tanvee

  • 0 in reply to Tanvee
    Intellectual 320 points

    Hi Tanvee,

    We didnt connect the output to any load circuits. We just rig up the above shown schematics and the measured voltage is 2.3V. We tried changing the Buck converters too.

    Regards,

    Nivethitha.D

  • 0 in reply to Nivethitha D
    TI__Genius 15020 points

    Hi Nivethitha,

    I am  unclear which platform are you using for output observation.

    Are you measuring it on evaluation board? I would suggest to share the waveform if it is on hardware.

    If it is simulation then I would suggest to share the model.

    Best regards,

    Tanvee

  • 0 in reply to Tanvee
    Intellectual 320 points

    HI Tanvee,

    This is the output waveform for output voltage and load current. When the load is diconnected, the output voltage is 2.1V to 2.3V. When Connected with a constant  load of 50mA, the voltage decreases  to 1V.why is it so? Please suggest any solution. Thanks in advance.

    Regards,

    Nivethitha D

  • 0 in reply to Tanvee
    Intellectual 320 points

    we made up the circuit as shown in the above circuit. The input for the buck converter comes from the Coin cell 3V.

  • +1 in reply to Nivethitha D
    TI__Genius 15020 points

    Hi Nivethitha,

    Generally, battery has current limitation and selected coin battery might not able to support input current for load condition. You can try to disconnect the coin battery and try to connect external supply and check the voltage.

    Can you share the layout and setup details? Device should give 1.8V output and not 2.3V.

    Best regards,

    Tanvee