TPS61043: UVLO Hysteresis

Jeffrey Summit

Part Number: TPS61043

I am looking at using the TPS61043 in a AAA 2-cell application, driving a string of LEDs. The batteries will run down to the UVLO level. There is not a listing for hysteresis on V(UVLO) in the EC table.

1) Is there hysteresis on UVLO that is not listed?

2) Is there a recommendation for an external UVLO or Hysteresis add-on?

over 2 years ago

0 Mason Wang over 2 years ago

TI__Genius 9630 points

Hi Jeffrey

1.for 61043, there is no hysteresis on UVLO

2. It is not recommended to add external one, normally, the UV point set in the device can ensure the normal operation of inner LDO, digital and analog circuits. The performance with input voltage lower thanUV point cannot be guaranteed.

0 Jeffrey Summit over 2 years ago in reply to Mason Wang

Prodigy 20 points

Thank you for confirming the no UVLO Hysteresis. I do not understand why it was not included, but so be it. Why do you say it is not recommended to have an external UVLO? It would just need to be at a higher voltage than the internal UVLO, say 1.8 or 1.9V.

0 Mason Wang over 2 years ago in reply to Jeffrey Summit

TI__Genius 9630 points

hi Jeffrey

Sorry, got a misunderstanding on this. You can add extra UVLO as long as it is higher than internal UV point. Not sure the purpose here, just to shut down the system in advance?