What pcb track width size to use? Urgent !!!

[Sunny55]

My ic have pad width of 0.28mm and its smd type. My question is what pcb track size i need to use to supply 5A as output current?
Can the track width be bigger than the ic pad width of 0.28mm? Pls help. The input voltage is around 15V.

Thanks .

 

[tpetar]

Is that IC constructed to support 5A ?

You can use other side of PCB for increasing heatsink and square area of tracks, plus you can add more soldering material on track.



What particular IC is involved in this ?

 

[Sunny55]

Yes, ic can support 5A n there is a thermal pad in center for heat dissipation but my requirement is i have to use only single sided pcb .

 

[tpetar]

What manufacturer recommend in datasheet for PCB design, did you check that ?

 

[Sunny55]

Its a mppt ic and the co suggested width of 2.8mm for 5A.Thats way too big for the pad right?

 

[tpetar]

What is exact IC product ID if not Area-51 top secret ?

 

[Sunny55]

Its BQ24650 from TI.

 

[tpetar]

Page 25 in datasheet describe PCB Layout, accept that in your design.

I dont think that you will have some problem. You need stronger tracks for MosFETs, D1, L, Rsr,....

 

[godfreyl]

The important point is that the high current does not flow through any of the BQ24650 chip's pins, only through other components.

 

[Sunny55]

Basically i can use track width that is same as pad width of 0.28mm as i will use some jumpers that can carry 5A?

Let me make it clear, the mentioned pcb is actually just the breakout board that will be used on breadboard for testing with other components . Jumper wires capable of handling 5A will be use to connect ic with the other components. This is going to work well?

 

[tpetar]

IC alone dont have problem with high current, periphermal parts have. Use stronger wires if you have, and avoid to pass higher currents through breadboard, 5A for testing on shorter time intervals not problem.