• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 2 answers
  • Subscribers 63 subscribers
  • Views 285 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM317: Replacing LM317 with switch mode chip for battery charging supply

Pradeep Patel
Prodigy 90 points

Part Number: LM317
Other Parts Discussed in Thread: BQ24610

Tool/software:

Hi,

I have an old design in which LM317KCS (TO-220) is used for supplying 14.2V output from 24V input to charge lead acid battery in constant voltage mode. There is an external circuit on battery which monitors voltages of each cell and cut-off the charging supply to battery when total battery voltage reaches 11.8V. 

As input is 24V, this supply circuit is dissipating lot of power in LM317 and hence additional heat sink is used with chip for heat management. Is it possible to replace LM317 in this application with some other switch mode supply so as to avoid external heat sink and big package of LM317? As the load here is battery and hence I am not clear if this is possible or not. Also, if it is possible then do we have to take any additional care for this battery as load?

Thanks,

Pradeep