TPS2115A: Second LED is lighting too

Nikos Tosis

Part Number: TPS2115A
Other Parts Discussed in Thread: TPS2115

Tool/software:

Hello,

I made a board with the TPS2115A but when the one Supply is active and the second one is not connected the second led is lighting weak too. Am I made a design mistake?

Kind Regards,
Niko

1 month ago

0 Kunal Goel 1 month ago

TI__Guru* 79091 points

Hi Niko,

Maybe due to reverse leakage current led is lighting.

Regards

Kunal Goel

0 Nikos Tosis 1 month ago in reply to Kunal Goel

Intellectual 410 points

Thanks, is the leakage coming from TPS? or from the volatge diff between VCC and the R2 and R3? Do you have any fix please?

Kind Regards,

Niko

0 Kunal Goel 1 month ago in reply to Nikos Tosis

TI__Guru* 79091 points

Hi Niko,

Not from TPS2115. Maybe you can try increasing R2.

Regards

Kunal Goel

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TPS2115A: Second LED is lighting too