Good afternoon,
I help some help from all of you on the method of calculate the temperature rise on PCB when i charging my device. And my problem is unknown the value of the conductivity of the copper to calculate for the temperature rise

thank you.

 

This is like asking someone to help you calculate how much gasoline you will use for a trip but that you don't know what the mileage that your car gets.

If you don't know the value of the key parameters, then you either have to estimate them or measure them, directly or indirectly.

Sounds like simply measuring the temperature rise on your PCB when you are charging you device is probably your best bet.

 

Good afternoon,
I help some help from all of you on the method of calculate the temperature rise on PCB when i charging my device. And my problem is unknown the value of the conductivity of the copper to calculate for the temperature rise

thank you.

a quick Google will give you all sorts of on line calculators for pcb degree C per watt , depending on shape, air flow, pcb material, copper thickness etc.

the chip data sheet will have a degree c per watt of the silicon to the package.

add these two numberes and you knkw how hot above ambient the silicon will be for every watt you put into the chip.

you then calculate your chips wattage, multiply by the above sum, and you have your silicone temprature.

 

Temperature rise in any electrical device is proportional to power dissipation, and inversely driven by heat radiation effectiveness. Without any information the very best answer that we can provide is "YES!"