UC3842集成块在电路中的工作原理和作用，并说明电路是如何稳压的 UC3842集成块在电路中的工作原理和作用，并说明电路是如何...
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UC3842集成块在电路中的作用是PWM（脉冲宽度调制），内部有保护电路、基准电压电路、振荡电路、过流、电压反馈电路、输出电路。工作原理就是通过RC振荡，产生一定频率占空比的方波，控制开关管通断，通过变压器变压，输出低压脉冲方波，再经整流、滤波输出直流电压，它的稳压通过对输出取样后，反馈给UC3842电压反馈电路，控制振荡方波的占空比，来实现输出稳定。绛旓細UC3842闆嗘垚鍧楀湪鐢佃矾涓殑浣滅敤鏄疨WM锛堣剦鍐插搴﹁皟鍒讹級锛屽唴閮ㄦ湁淇濇姢鐢佃矾銆佸熀鍑嗙數鍘嬬數璺佹尟鑽＄數璺佽繃娴併佺數鍘嬪弽棣堢數璺佽緭鍑虹數璺傚伐浣滃師鐞嗗氨鏄氳繃RC鎸崱锛屼骇鐢熶竴瀹氶鐜囧崰绌烘瘮鐨勬柟娉紝鎺у埗寮鍏崇閫氭柇锛岄氳繃鍙樺帇鍣ㄥ彉鍘嬶紝杈撳嚭浣庡帇鑴夊啿鏂规尝锛屽啀缁忔暣娴併佹护娉㈣緭鍑虹洿娴佺數鍘嬶紝瀹冪殑绋冲帇閫氳繃瀵硅緭鍑哄彇鏍峰悗锛屽弽棣堢粰UC3842鐢靛帇...
绛旓細UC3842 閲囩敤鍥哄畾宸ヤ綔棰戠巼鑴夊啿瀹藉害鍙帶璋冨埗鏂瑰紡锛屽叡鏈8 涓紩鑴氾紝鍚勮剼鍔熻兘濡備笅锛氣憼鑴氭槸璇樊鏀惧ぇ鍣ㄧ殑杈撳嚭绔紝澶栨帴闃诲鍏冧欢鐢ㄤ簬鏀瑰杽璇樊鏀惧ぇ鍣ㄧ殑澧炵泭鍜岄鐜囩壒鎬э紱鈶¤剼鏄弽棣堢數鍘嬭緭鍏ョ锛屾鑴氱數鍘嬩笌璇樊鏀惧ぇ鍣ㄥ悓鐩哥鐨2.5V 鍩哄噯鐢靛帇杩涜姣旇緝锛屼骇鐢熻宸數鍘嬶紝浠庤屾帶鍒惰剦鍐插搴︼紱鈶㈣剼涓虹數娴佹娴嬭緭鍏ョ锛 褰撴娴...
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