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5.防止开关管击穿保护:开关管V901集电极所接元件,如:C911、R910、VD904、L902等构成尖峰吸收网络,用于吸收V901在高频转换过程中集电极所产生的尖峰电压,对V901本身进行保护。 V901射极电路中的VD905也具有保护作用。若V901c、e极击穿,则VD905也迅速击穿,从而使保险丝F1001快速熔断。若无VD905,R908//R909对V901
5 to prevent the switch tube breakdown protection: switch tube V901 collector connected components, such as: C911, R910, VD904, L902 constitute a spike absorption network, used to absorb V901 in the high frequency conversion process generated by the spike voltage , V901 itself to protect. V901 emitter circuit VD905 also has a protective effect. If V901c, e pole breakdown, VD905 also quickly breakdown, so fuse F1001 quickly blown. Without VD905, R908 // R909 to V901