Comparative Study on the Design of Dimming Control Circuits

This study primarily focuses on a comparative analysis of dimming circuit designs, with the design of three dimming control circuits based on different dimming chips. The aim is to analyze the advantages and disadvantages of different design schemes and explore more efficient and intelligent dimming circuit design methods. The dimming control circuits adopt PWM dimming methods, and tests are conducted on the dimming circuits under different input voltages and different load resistances to obtain the output conditions of the dimming circuits. Under the same testing conditions, the test results of the three circuits are compared to derive the advantages and disadvantages of each dimming circuit. Through testing, each dimming circuit can complete the basic dimming function, and all three circuits can adjust the brightness under different duty ratios. Finally, the comprehensive study concludes that the dimming control circuit designed based on the FP7195 chip better meets the design requirements.