160W DC Electronic Load Control Stage

 
This project is a control board, and the power board will be made public in another open source project.
 
1. Input voltage 0 to 36V (MOS withstand voltage 200V, by changing the voltage sampling resistor divider ratio, it can achieve 0 to 100V voltage input, it is not recommended to set it too high)
2. Input current limit is 0 to 10A (two MOS tubes plus two independent loops to achieve current sharing, each MOS tube 0 to 5A)
3. Use type-C power supply, and obtain 12V voltage to power the fan by deceiving QC2.0. When using, please choose a charging head that supports QC fast charging
4. Support four modes, CC, CV, CR, CP, constant current load and constant voltage load are realized by hardware loop, constant resistance load and constant power load are realized by software and hardware loop. Since the power loop is not used, constant resistance and constant power are essentially realized by constant voltage and constant current loops, so CR and CP need to be divided into CCR (constant resistance in constant current mode), CCP (constant power in constant current mode), CVR (constant resistance in constant voltage mode), CVP (constant power in constant voltage mode)
5. The maximum heat dissipation power is conservatively 160W (measured 160W, 40 minutes test, ambient temperature is 25℃, MOS tube shell temperature is 75℃)
6. The radiator samples the 2U radiator of the Golden Leopard server, which will be noisy when fully loaded 
7. Since there is no constant current source at hand, only CC, CCP, and CCR modes are open, and they will be improved later.
8. Power level link: https://oshwhub.com/awedawd/dian-zi-fu-zai-gong-lv-ji
9. The MOS tube heat dissipation adopts domestic insulating thermal conductive silicone with a thermal conductivity of 8 ##Not using insulating thermal conductive silicone will cause the metal shell of the radiator to be charged##
10. Supports overvoltage, overcurrent, and overpower protection, and automatically shuts down the electronic load when a fault is detected