TPS61122: Short-circuit when connecting SWP

Chris Schramm

Part Number: TPS61122

Dear TI-Team,

I'm prototyping with TPS61122PW but as soon as I connect SWP to the inductor I get a short-circuit.

The schematic is very simple, I guess:

w/o SWP connected and VIN = VBAT = LBI = SKIPEN = EN = LDOEN = 3.3V I see an average current of between 1.3 and 2.5 mA

Any help, please? I guess I have a wrong connection, but I can't see it

0 Minqiu Xie over 6 years ago

Hi Chris:
The expert for tps61122 is out of office. The reply may be delay. Please wait with patient.
Thanks for your understanding.

0 Helen chen over 6 years ago

Hi Chris:
Could you please tell me in detail which point to which point short circuit?

0 Chris Schramm over 6 years ago in reply to Helen chen

Hi Helen,

well, I guess it's something with SWN (not with SWP, that was a mistake).

I can connect everything, but as soon as I connect SWN I see excessive current and the IC gets really hot

0 Chris Schramm over 6 years ago in reply to Chris Schramm

Hi Helen, seems it was a manufacturing problem... tried with a different PCB now and it works.. strange..

0 Helen chen over 6 years ago in reply to Chris Schramm

Thanks for the update! think it is a soldering issue :)
Good luck to you!

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