# PCB design for 13A/12V Circuit

I am new to PCB design and am building a PCB circuit powered by a 2200mAH, 25C , 3S lipo battery, the maximum current that will be drawn from this would be 13 Amps.

I usually use the trace calculator to figure out the thickness of the trace. However, this is the first time i am working with current greater than 2 Amps. So, i just want to make sure i dont have to do something special, when designing a 2 layer pcb that has 13 amps of current running through its veins.

• Have a good fuse. – vini_i Jun 25 at 22:33
• What is your pcb copper weight? What is your max acceptable temperature rise? – Voltage Spike Jun 25 at 22:34
• @laptop2d i usually have the copper weight set at 2 oz. Only because thats the default value that is already set. And i dont have any specific temperature requirements. – Muneeb Rehman Jun 25 at 22:47
• Then it doesn't matter how big your trace is. Temperature rise is one of the main parameters in the trace sizing equations. – Voltage Spike Jun 25 at 22:50
• Make sure the solder pad (and lead with solder) contact a large area so heat is not concentrated at the through-hole. – DrMoishe Pippik Jun 25 at 23:10

The resistance of copper traces account for more power loss and heat generation when they carry high current.

Larger cross-sectional area have lower resistance, which reduces the amount of power lost to heat. As you mentioned you know how thick your trace should be but there are other factors also which should be considered while designing high power PCB.

The main hazard is heat, This must always be considered when the housing is made, and external vents/fans should be used.

To reduce the amount of heat produced on the board itself, it is best to choose components with low resistance.

the next main hazard is short circuit As you are designing board with power traces, when shorted it will be able to consume considerable amount of power. The easiest way to deal with this problem is to use FUSE.the fuses should be always be rated for less current than wire can handle

You might find this useful. It's an online trace width calculator which also shows temperature rises you can expect. Probably not the only one, but representative of what is available free.

You can design a 2 layer PCB. But you just used to 2OZ(70um) copper for TOP & Bottom.

if you need design PCB for 12A/12V circuit, you need router 5MM(200mil) copper width to it.

• Your comment makes a lot of statements (which are debatable), and has not enough explanation. it also has your personal email, which is not normal to include in answers on this platform (electrical engineering stack exchange). Questions and clarifications are meant to be public, in this comments section, and you can edit your answer publicly, to help others in future. – KyranF Jun 27 at 8:06