TPS2115A - Manual switching mode

TiagoeacPereira

Hi,

I have this system and i need autoswitch and USB is connected, solar panel it's always connected.

So i designed this way, but i think its not work because D0 and D1 its internal pull-up.

And i modify the circuit for this, and change +IN1 to Solar Panel and +IN2 to USB, this approach it's work or there is another way to improve this?

Thank you

over 9 years ago

0 Aleksandras_Kaknevicius over 9 years ago

TI__Genius 15780 points

Hi Tiagoeac,

This device falls into the power interface forum. I will go ahead and move this post there.

Thanks,

Alek Kaknevicius

0 Eric Wright over 9 years ago in reply to Aleksandras_Kaknevicius

TI__Mastermind 42795 points

Yes, it seems that this method will work as long as the voltage from the solar panel to IN1 is greater than the voltage to IN2 (USB?) when both are present at the same time.

0 TiagoeacPereira over 9 years ago in reply to Eric Wright

Prodigy 30 points

Thank you for your replay, but I can't understand why "as long as the voltage from the solar panel to IN1 is greater than the voltage to IN2 (USB?) when both are present at the same time", if D0 it's all the time 0, and Vi(IN2) > Vi(IN1) it's don't care.

I need cut-off solar panel, always USB it's connected.

0 Eric Wright over 9 years ago in reply to TiagoeacPereira

TI__Mastermind 42795 points

Yes, you are correct. Just follow the truth table. When D0=1 and D1=0 then the auto switch occurs depending on the voltage magnitudes at the IN1, IN2 pins.

0 TiagoeacPereira over 9 years ago in reply to Eric Wright

Prodigy 30 points

Thank you Eric Wright for support,
Best regards

Power management

Power management forum

TPS2115A - Manual switching mode