Heavier Copper for Higher Currents: PCB Design Tips Read on for some high current PCB design tips. But in some PCB devices, especially devices with small form factor, incorporating a fan or a bulky heat sink may not be possible on the ground plane. These systems essentially move heat from the board and exchange it with moving air. Everyone is probably familiar with fans and heat sinks used on computer processors. Heat that is generated by power loss in high current circuits should be moved away from the device in order to combat temperature rise. Designers will need to implement creative strategies to manage heat generated in a high current PCB layout. Power systems with high output, such as Li+ ion batteries used in electric vehicles, require integrated power management systems that are built on PCBs. This is especially true in printed circuit boards (PCBs) that operate at high current-carrying capacity. Very simply, I did not take into account the high current PCB layout.Īs electronics continue to be miniaturized, the thermal demands in these systems increase as more features are packed into smaller devices. Why did this happen you ask? No, this was not due to a short circuit. Thankfully, the destruction was minor and most of the components were salvageable. It started with the resistors and quickly spread to a nearby decoupling capacitor. I remember the first (and hopefully the only) time one of my circuits caught on fire.
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