LMP7721: LMP7721MAX/NOPB Usage problem

yingjiao LI

Part Number: LMP7721

Tool/software:

After the LMP7721MAX/NOPB device was soldered, an abnormal output was found during no-load testing. Could you help me confirm if my testing method is correct? Could you also inform me of the correct testing method?

7 months ago

0 Ron Michallick 7 months ago

TI__Guru**** 165376 points

Hello Yingjiao,

The schematic upload didn't work. Do you mean no load or no input?

0 yingjiao LI 7 months ago in reply to Ron Michallick

Expert 1375 points

Abnormal output during no-load test

0 Ron Michallick 7 months ago in reply to yingjiao LI

TI__Guru**** 165376 points

Yingjiao,

Thanks, but I was talking about this picture. (see broken image icon)

I don't know if the reading is correct, unless I know the schematic and input values.

0 yingjiao LI 7 months ago in reply to Ron Michallick

Expert 1375 points

Hi'..

The input and output are 5values

0 Ron Michallick 6 months ago in reply to yingjiao LI

TI__Guru**** 165376 points

Yingjiao,

Which 5 values?

0 yingjiao LI 6 months ago in reply to Ron Michallick

Expert 1375 points

Please check the picture.

0 Ron Michallick 6 months ago in reply to yingjiao LI

TI__Guru**** 165376 points

Yingjiao,

2.474V is within the normal range of LMP7721MAX/NOPB. It looks fine to me.

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LMP7721: LMP7721MAX/NOPB Usage problem