I have a Li-ion battery pack with 8 cells in series structure.
The block of the charger is shown below.
I setup the fullcharge voltage is 4.2V, so the battery pack fullcharge voltage is 33.6V .
As noted above,I setup the AC-DC output voltage is 34.2V,but the LTC4162-L was accidentally damaged twice .
I think the voltage fluctuation of power supply csase the accident.
After all, 34.2V and the absolute maxsimum voltage(36V) are too close.
I had to lower the voltage, but the result was that the battery pack fullcharge voltage could not reach 33.6V.
I have no idea what is the suiteable input voltage for the LTC4162-L if I want to chrage for a 8S Li-ion battery pack or is there another solution for this ?
Yes, a suitable operation input is anything up to 35V, but the LTC4162 is guaranteed to withstand voltages up to 36V.
This is probably an instantaneous violation of one of the abs max voltages - but not necessarily this input voltage.
I'm attaching a guide describing the problem and proposing a few solutions.
I want the fullcharge voltage of the 8S battery pack to get 33.6V,otherwise, the working time of my machine will not meet the requirements.
But I think there are some risks if LTC4162-L is used to charge the battery.
Could you give me some other solution(charger IC)?No matter smart or non- smart charging IC is ok.
I want it to be a backup solution for the project?
The LTC4162-L is a fine choice for this app if you can adequately protect from transients.
Otherwise, you might consider LTC4013 which is a 60V part.