TPS25924: Changing R_limit value after start-up.

Alek Toomians81

Part Number: TPS25924

The application requires to change the I_limit after start up. Is it OK to switch in a resistor in parallel with R_llimit through a MOSFET?

Thanks,
Alek

over 5 years ago

0 Praveen GD over 5 years ago

TI__Guru 57737 points

Hi Alek,

Yes, a circuit similar to the one shown below can be used to change the current limit dynamically.

A logic-level input enables/disables MOSFET Q1 and changes the current-limit threshold by modifying the total resistance from ILIM to GND. Additional MOSFETs/resistor combinations can be used in parallel to Q1/R2 to increase the number of additional current-limit levels.

0 Praveen GD over 5 years ago in reply to Praveen GD

TI__Guru 57737 points

Hi Alek,

Do you have any other questions ? If not, can we close this thread ?

0 Alek Toomians81 over 5 years ago in reply to Praveen GD

TI__Prodigy 180 points

Praveen,

Thanks you so much. You cleared my question,

Appreciate your help,

Alek

Power management

Power management forum

TPS25924: Changing R_limit value after start-up.