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TLV61220: TLV61220

ANURAJ NK
Intellectual 510 points
Part Number: TLV61220

Hi,

    I am looking for test procedure to validate the Rds(On) in the above mentioned boost converter as specified in the datasheet.

   

1. Test conditions say, Vout=3.3V or Vout=5V. Here, i need to force these voltage to output or I have to set the output to these values using external resistors? What should be voltage at SW pin?

Regards

Anuraj 

  • 0
    TI__Intellectual 2655 points
    Hi Anuraj
    TI has special test mode to test Rdson. For customer you can make IC works and test MOS's voltage and current when it turn on to calculate Rdson.
    Thanks
    Jing
  • 0
    TI__Guru* 78070 points
    The engineer supporting this part is currently out of office. These values are guaranteed by design. To measure the Rds(ON), the IC must be put into a special test mode, which will not be disclosed. So please use the datasheet values as references.
  • 0 in reply to Youhao Xi
    Intellectual 510 points
    Hi Youhao,

    Thanks for your replay.This Question background is, I am designing a load board to test the boost ICs in ATE platform and I am considering this chip for my learning purpose.So i am interested to know more on the ATE testing side than bench testing.

    As per the architecture, there are two FETs inside the chip.To test the Rectifying switch on resistance, I have to make it ON and OFF the Main switch FET. Can I use the below procedure to turn On and Off the fets. Please confirm.

    1.case 1 - Vfb>Vref -> the control loop "thinks" there is too much energy at Vout and tries to discharge the Cout = LS ON & HS OFF
    case 2 - Vfb<Vref -> the control loop "thinks" there is too less energy at Vout and tries to charge the Cout = LS OFF & HS ON


    Regards
    Anuraj NK
  • 0 in reply to ANURAJ NK
    TI__Mastermind 46905 points
    as we suggested, the test mode can set the ls or the hs MOS always on.
    but the measure you mentioned doesn't work because the IC stop switch at vfb higher than reference voltage. the two switch are off.