TPS2116: tps2116

user4961418

Prodigy 190 points

Part Number: TPS2116

IMG_20251212_0001.pdf

3 months ago

0 Bandaru Hemanth 3 months ago

TI__Expert 3680 points

Hi,

thanks for reaching out,

what's your exact issue, saw the image but could not understand the problem.

Thanks,

Hemanth.

0 user4961418 3 months ago

Prodigy 190 points

I'm considering switching between a battery and a 5V power supply generating 3.3V. Considering the VOUT voltage drop during switching, I'm considering using the 5V power supply on PRI and switching at around 3.5V. MODE is input directly from the 3.3V power supply. Will switching work properly if I use it this way?
Thank you in advance.

0 user4961418 3 months ago in reply to user4961418

Prodigy 190 points

Hello.
I'm resending the circuit diagram because it's difficult to read.

Thank you.

+1 Bandaru Hemanth 3 months ago in reply to user4961418

TI__Expert 3680 points

Hi,

I have reviewed the circuit, everything looks good, I hope it works properly, it's better to simulate once & check the waveforms.

seems like you are operating the device in priority mode. So

if power(5V) < 3.3V, then PR1<VREF (0.92 to 1.08V), VOUT = BT.

if power(5V)>3.3V, then PR1>VREF, VOUT = VIN1 = 3.3V.(LDO output )

Do the above conditions hold for your circuit?

Thanks,

Hemanth.

Power management

Power management forum

TPS2116: tps2116