Module design using 2-layers PCB for an automotive BLDC motor driver

This paper reports the PCB design method of a 2-layers PCB stack-up instead of a 4-layers PCB stack-up for a BLDC motor driver. PCB design methodology is suggested to protect a system from performance decline in design of a 2-layers PCB system compared with a 4-layers system. For system specs, the maximum frequency of the BLDC motor drive module is 8 MHz and the operating voltage and peak current are 12V and 10A. The environment temperature and tolerable maximum temperature are given at 120°C and 180°C. For keeping its performance, electrically qualifying design methods of signal integrity, power integrity and EMI problems are considered and are proven through their performances compared with 4-Layers PCB system. The simulated results of designed 2-layers module show the successful design of a 2-layers PCB BLDC motor drive without any module area penalty and performance degradation.