贴片3842 3843 3844 3845 代换 为何3843可代替3842，3842却不能代换3843？
\u8d34\u72473842 3843 3844 3845 \u4ee3\u6362\u6211\u539f\u6765\u5728\u4fee\u8fd9\u79cd\u7535\u5bb9\u6216\u7535\u963b\u7684\u65f6\u5019\u53ea\u8981\u6d4b\u4e0b\u6570\u53ea\u8981\u6bd4\u4f60\u6362\u7684\u8d34\u7247\u5143\u4ef6\u5927\u5c31\u884c\u3002\uff08\u5982\u539f\u7535\u963b25\u73b0\u5728\u4f60\u53ef\u4ee5\u636230\u7684\uff09\u8fd9\u6837\u53ea\u662f\u53ef\u4ee5\u8d77\u5230\u4ee3\u66ff\u5e76\u4e14\u4e0d\u4f1a\u70e7\u574f\u673a\u5668\u3002
\u539f\u56e0\u5982\u4e0b\uff1a
1\u3001\u7531\u4e8eUC3842\uff08KA3842\uff09\u7684\u5de5\u4f5c\u7535\u538b\u548c\u8f93\u51fa\u529f\u7387\u5747\u4e0eUC3843\uff08KA3843\uff09\u76f8\u5dee\u751a\u8fdc\u3002
2\u3001\u540c\u65f6\uff0c3842\u7cfb\u5217\u548c3843\u7cfb\u5217\u5728\u542f\u52a8\u7535\u538b\u548c\u5173\u95ed\u7535\u538b\u65b9\u9762\u4e5f\u5b58\u5728\u7740\u8f83\u5927\u7684\u533a\u522b\uff0c\u524d\u8005\u7684\u542f\u52a8\u7535\u538b\u4e3a16V,\u5173\u95ed\u7535\u538b\u4e3a10V;\u540e\u8005\u7684\u542f\u52a8\u7535\u538b\u4e3a8.5V\uff0c\u5173\u95ed\u7535\u538b\u4e3a7.6V\u3002\u8fd9\u4e24\u4e2a\u7cfb\u5217\u7684IC\u4e0d\u80fd\u76f4\u63a5\u4ee3\u6362\u3002
3\u3001\u518d\u5c31\u662f\u5360\u7a7a\u6bd4\u8303\u56f4\u4e0d\u540c\uff0c\u4e00\u4e2a\u662f0-50%\uff0c\u53e6\u4e00\u4e2a\u662f0-100%\u3002
\u6269\u5c55\u8d44\u6599\uff1a
UC3842 \u91c7\u7528\u56fa\u5b9a\u5de5\u4f5c\u9891\u7387\u8109\u51b2\u5bbd\u5ea6\u53ef\u63a7\u8c03\u5236\u65b9\u5f0f\uff0c\u5171\u67098 \u4e2a\u5f15\u811a\uff0c\u5404\u811a\u529f\u80fd\u5982\u4e0b\uff1a
\u2460\u3001\u811a\u662f\u8bef\u5dee\u653e\u5927\u5668\u7684\u8f93\u51fa\u7aef\uff0c\u5916\u63a5\u963b\u5bb9\u5143\u4ef6\u7528\u4e8e\u6539\u5584\u8bef\u5dee\u653e\u5927\u5668\u7684\u589e\u76ca\u548c\u9891\u7387\u7279\u6027\uff1b
\u2461\u3001\u811a\u662f\u53cd\u9988\u7535\u538b\u8f93\u5165\u7aef\uff0c\u6b64\u811a\u7535\u538b\u4e0e\u8bef\u5dee\u653e\u5927\u5668\u540c\u76f8\u7aef\u76842.5V \u57fa\u51c6\u7535\u538b\u8fdb\u884c\u6bd4\u8f83\uff0c\u4ea7\u751f\u8bef\u5dee\u7535\u538b\uff0c\u4ece\u800c\u63a7\u5236\u8109\u51b2\u5bbd\u5ea6\uff1b
\u2462\u3001\u811a\u4e3a\u7535\u6d41\u68c0\u6d4b\u8f93\u5165\u7aef\uff0c \u5f53\u68c0\u6d4b\u7535\u538b\u8d85\u8fc71V\u65f6\u7f29\u5c0f\u8109\u51b2\u5bbd\u5ea6\u4f7f\u7535\u6e90\u5904\u4e8e\u95f4\u6b47\u5de5\u4f5c\u72b6\u6001\uff1b
\u2463\u3001\u811a\u4e3a\u5b9a\u65f6\u7aef\uff0c\u5185\u90e8\u632f\u8361\u5668\u7684\u5de5\u4f5c\u9891\u7387\u7531\u5916\u63a5\u7684\u963b\u5bb9\u65f6\u95f4\u5e38\u6570\u51b3\u5b9a\uff0cf=1.72/(RT\u00d7CT)\uff1b
\u2464\u3001\u811a\u4e3a\u516c\u5171\u5730\u7aef\uff1b
\u2465\u3001\u811a\u4e3a\u63a8\u633d\u8f93\u51fa\u7aef\uff0c\u5185\u90e8\u4e3a\u56fe\u817e\u67f1\u5f0f\uff0c\u4e0a\u5347\u3001\u4e0b\u964d\u65f6\u95f4\u4ec5\u4e3a50ns \u9a71\u52a8\u80fd\u529b\u4e3a\u00b11A \uff1b
\u2466\u3001\u811a\u662f\u76f4\u6d41\u7535\u6e90\u4f9b\u7535\u7aef\uff0c\u5177\u6709\u6b20\u3001\u8fc7\u538b\u9501\u5b9a\u529f\u80fd\uff0c\u82af\u7247\u529f\u8017\u4e3a15mW\uff1b
\u2467\u3001\u811a\u4e3a5V \u57fa\u51c6\u7535\u538b\u8f93\u51fa\u7aef\uff0c\u670950mA \u7684\u8d1f\u8f7d\u80fd\u529b\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a
\u767e\u5ea6\u767e\u79d1\u2014UC3843
\u767e\u5ea6\u767e\u79d1\u2014uc3842
代换UC3843的是UCX843.同样X也表示任何数字.如UC2843...剩下的3844..3845都是一个道理.
这几个片子都是震荡芯片.是电源上控制开关管的.
详细资料可以自己查..www.icminer.com 注册后就可以查了.
