With the rapid development of electronic components, power circuit board PCB design is facing greater challenges, mainly including power conversion efficiency, thermal analysis, power plane integrity and EMI (electromagnetic interference). What are the common problems in PCB design of power circuit board:

1. Power conversion efficiency. Conversion efficiency refers to the ratio of the output power of the power supply to the input power actually consumed. In practical application, if the electric energy can not be completely converted, there will be a certain energy consumption. No matter what kind of circuit, there must be efficiency problems in power conversion.

2. Heat dissipation. If there is energy loss, heat will inevitably be generated; As the load becomes heavier, the power consumption of power chip increases, because heat distribution is a problem that needs to be paid attention to in PCB power supply design. What are the common problems in PCB design of power circuit board

3. Power plane integrity design. Maintaining the integrity of the power supply is to maintain the stable power supply of the power supply. In the actual system, there are always noises of different frequencies, so a low impedance power supply plane design is necessary.

4. Electromagnetic interference problem: switching noise will be generated during the continuous on and off of switching power supply. If the loop inductance is not considered in the design, excessive return path will produce electromagnetic interference.