LTC4079E Li-ion IFR battery

Hi Prabhat,

What voltage do you measure on the FB pin?

You should see less than 7.2V during the CC portion of the charge cycle. Once you see the current start to taper, the charge voltage will approach 7.2V. The final voltage of the battery once charging terminates should be 7.2V.

The other thing to watch out for is to make sure your input voltage is high enough to meet the dropout requirements. Try maybe 10V+ as a test (if you're not above that already) and see if that makes a difference.

Regards,
Zack

Hi Prabhat,

What voltage do you measure on the FB pin?

You should see less than 7.2V during the CC portion of the charge cycle. Once you see the current start to taper, the charge voltage will approach 7.2V. The final voltage of the battery once charging terminates should be 7.2V.

The other thing to watch out for is to make sure your input voltage is high enough to meet the dropout requirements. Try maybe 10V+ as a test (if you're not above that already) and see if that makes a difference.

Regards,
Zack

Hi Zack, 

It turns out that it takes a bit longer to charge up to 7.2V. Thanks for your help.

Prabhat