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该机电源采用并联型开关电源,由于使用了厚膜电路1L0380R,使其外部电路简单、元件少,超宽的工作电压,市电电压在90～270V都能正常工作,性能优异,故障率低。电源原理如图1所示。一、工作原理 1.电源的启动、工作过程:220V市电电压经D101～D104整流、C109滤波后得到310V直流电压:一路经开关变压器T102的初级加到IC101(1L0380R)②脚(内部场效应开关管的漏极);另一路由R102、R127、C111构成1L0380R的启动电路,产生的启动电
The machine power using parallel switching power supply, due to the use of thick film circuit 1L0380R, to make its external circuit is simple, less components, wide operating voltage, mains voltage 90 ~ 270V can work normally, excellent performance, low failure rate . Power principle shown in Figure 1. First, the working principle 1. Power start, working process: 220V mains voltage by D101 ~ D104 rectifier, C109 filtered 310V DC voltage: all the way through the switch transformer T102 added to the primary IC101 (1L0380R) ② feet (internal field effect The drain of the switch tube); The other route R102, R127, C111 forms the starting circuit of 1L0380R, produces the starting electricity