UC3842输出6脚150欧电阻串联二极管？场效果G极对3842地稳压管？？ uc3842 烧管子
UC3842\u7b2c6\u811a\u8f93\u51fa\u7aef\uff0c\u63a5\u9650\u6d41\u7535\u963b\uff0c\u8fd9\u4e2a\u7535\u963b\u4e0a\u9762\u53c8\u5e76\u4e2a\u4e8c\u6781\u7ba1\uff0c\u6709\u4ec0\u4e48\u7528\uff1f\u8fd9\u4e2a\u4e8c\u6781\u7ba1\u4e3b\u8981\u662f\u52a0\u5feb\u5f00\u5173\u7ba1\u7684\u622a\u6b62\u65f6\u95f4\uff01\u56e0\u4e3a\u6709\u7ed3\u7535\u5bb9\u7684\u5b58\u5728\uff0c\u6240\u4ee5\u4f1a\u5ef6\u957f\u5173\u65ad\u65f6\u95f4\uff08\u4e0b\u964d\u6cbf\uff09\uff0c\u6240\u4ee5\uff0c\u52a0\u4e8c\u6781\u7ba1\u662f\u52a0\u5feb\u653e\u7535\u8fc7\u7a0b\uff08\u6b64\u65f66\u811a\u4e3a\u4f4e\u7535\u4f4d\uff0c\u7ed3\u7535\u5bb9\u8fc7\u4e8c\u6781\u7ba1\u76f4\u63a5\u5bf90\u7535\u4f4d\u653e\u7535\uff0c\u80af\u5b9a\u6bd4\u7ecf\u8fc7\u9650\u6d41\u7535\u963b\u653e\u7535\u5feb\u7684\uff09\u3002
uc3842\u5927\u591a\u91c7\u7528dip-8\u5c01\u88c5\u4e0b\u56fe\u4e3auc3842
\u5185\u90e8\u6846\u56fe\u548c\u5f15\u811a\u56fe\uff0cuc3842
\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\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\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\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\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=1.8/(rt\u00d7ct)\uff1b\u2464\u811a\u4e3a\u516c\u5171\u5730\u7aef\uff1b\u2465\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\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\u811a\u4e3a5v
\u57fa\u51c6\u7535\u538b\u8f93\u51fa\u7aef\uff0c\u670950ma
\u7684\u8d1f\u8f7d\u80fd\u529b\u3002
uc3842
\u5185\u90e8\u539f\u7406\u6846\u56fe
uc3842\u662f\u4e00\u79cd\u6027\u80fd\u4f18\u5f02\u3001\u5e94\u7528\u5e7f\u6cdb\u3001\u7ed3\u6784\u8f83\u7b80\u5355\u7684pwm\u5f00\u5173\u7535\u6e90\u96c6\u6210\u63a7\u5236\u5668\uff0c\u7531\u4e8e\u5b83\u53ea\u6709\u4e00\u4e2a\u8f93\u51fa\u7aef\uff0c\u6240\u4ee5\u4e3b\u8981\u7528\u4e8e\u97f3\u7aef\u63a7\u5236\u7684\u5f00\u5173\u7535\u6e90\u3002
uc3842
7\u811a\u4e3a\u7535\u538b\u8f93\u5165\u7aef\uff0c\u5176\u542f\u52a8\u7535\u538b\u8303\u56f4\u4e3a16-34v\u3002\u5728\u7535\u6e90\u542f\u52a8\u65f6\uff0cvcc\uff1c16v\uff0c\u8f93\u5165\u7535\u538b\u65bd\u5bc6\u7269\u6bd4\u8f83\u5668\u8f93\u51fa\u4e3a0\uff0c\u6b64\u65f6\u65e0\u57fa\u51c6\u7535\u538b\u4ea7\u751f\uff0c\u7535\u8def\u4e0d\u5de5\u4f5c\uff1b\u5f53vcc\uff1e16v\u65f6\u8f93\u5165\u7535\u538b\u65bd\u5bc6\u7279\u6bd4\u8f83\u5668\u9001\u51fa\u9ad8\u7535\u5e73\u52305v\u8568\u7a33\u538b\u5668\uff0c\u4ea7\u751f5v\u57fa\u51c6\u7535\u538b\uff0c\u6b64\u7535\u538b\u4e00\u65b9\u9762\u4f9b\u9500\u5185\u90e8\u7535\u8def\u5de5\u4f5c\uff0c\u53e6\u4e00\u65b9\u9762\u901a\u8fc7\u2467\u811a\u5411\u5916\u90e8\u63d0\u4f9b\u53c2\u8003\u7535\u538b\u3002\u4e00\u65e6\u65bd\u5bc6\u7279\u6bd4\u8f83\u5668\u7ffb\u8f6c\u4e3a\u9ad8\u7535\u5e73\uff08\u82af\u7247\u5f00\u59cb\u5de5\u4f5c\u4ee5\u540e\uff09\uff0cvcc\u53ef\u4ee5\u572810v-34v\u8303\u56f4\u5185\u53d8\u5316\u800c\u4e0d\u5f71\u54cd\u7535\u8def\u7684\u5de5\u4f5c\u72b6\u6001\u3002\u5f53vcc\u4f4e\u4e8e10v\u65f6\uff0c\u65bd\u5bc6\u7279\u6bd4\u8f83\u5668\u53c8\u7ffb\u8f6c\u4e3a\u4f4e\u7535\u5e73\uff0c\u7535\u8def\u505c\u6b62\u5de5\u4f5c\u3002
\u5f53\u57fa\u51c6\u7a33\u538b\u6e90\u67095v\u57fa\u51c6\u7535\u538b\u8f93\u51fa\u65f6\uff0c\u57fa\u51c6\u7535\u538b\u68c0\u6d4b\u903b\u8f91\u6bd4\u8f83\u5668\u5373\u8fbe\u51fa\u9ad8\u7535\u5e73\u4fe1\u53f7\u5230\u8f93\u51fa\u7535\u8def\u3002\u540c\u65f6\uff0c\u632f\u8361\u5668\u5c06\u6839\u636e\u2463\u811a\u5916\u63a5rt\u3001ct\u53c2\u6570\u4ea7\u751ff=/rt.ct\u7684\u632f\u8361\u4fe1\u53f7\uff0c\u6b64\u4fe1\u53f7\u4e00\u8def\u76f4\u63a5\u52a0\u5230\u56fe\u817e\u67f1\u7535\u8def\u7684\u8f93\u5165\u7aef\uff0c\u53e6\u4e00\u8def\u52a0\u5230pwm\u8109\u5bbd\u5e02\u5236rs\u89e6\u53d1\u5668\u7684\u7f6e\u4f4d\u7aef\uff0crs\u578bpwn\u8109\u5bbd\u8c03\u5236\u5668\u7684r\u7aef\u63a5\u7535\u6d41\u68c0\u6d4b\u6bd4\u8f83\u5668\u8f93\u51fa\u7aef\u3002r\u7aef\u4e3a\u5360\u7a7a\u8c03\u8282\u63a7\u5236\u7aef\uff0c\u5f53r\u7535\u538b\u4e0a\u5347\u65f6\uff0cq\u7aef\u8109\u51b2\u52a0\u5bbd\uff0c\u540c\u65f6\u2465\u811a\u9001\u51fa\u8109\u5bbd\u4e5f\u52a0\u5bbd\uff08\u5360\u7a7a\u6bd4\u589e\u591a\uff09\uff1b\u5f53r\u7aef\u7535\u538b\u4e0b\u964d\u65f6\uff0cq\u7aef\u8109\u51b2\u53d8\u7a84\uff0c\u540c\u65f6\u2465\u811a\u9001\u51fa\u8109\u5bbd\u4e5f\u53d8\u53d8\u7a84\uff08\u5360\u7a7a\u6bd4\u51cf\u5c0f\uff09\u3002uc3842\u5404\u70b9\u65f6\u5e8f\u5982\u56fe\u6240\u793a\uff0c\u53ea\u6709\u5f53e\u70b9\u4e3a\u9ad8\u7535\u5e73\u65f6\u624d\u6709\u4fe1\u53f7\u8f93\u51fa
\uff0c\u5e76\u4e14a\u3001b\u70b9\u5168\u4e3a\u9ad8\u7535\u5e73\u65f6\uff0cd\u70b9\u624d\u9001\u51fa\u9ad8\u7535\u5e73\uff0cc\u70b9\u9001\u51fa\u4f4e\u7535\u5e73\uff0c\u5426\u5219d\u70b9\u9001\u51fa\u4f4e\u7535\u5e73\uff0cc\u70b9\u9001\u51fa\u9ad8\u7535\u5e73\u3002\u2461\u811a\u4e00\u822c\u63a5\u8f93\u51fa\u7535\u538b\u53d6\u6837\u4fe1\u53f7\uff0c\u4e5f\u79f0\u53cd\u9988\u4fe1\u53f7\u3002\u5f53\u2461\u811a\u7535\u538b\u4e0a\u5347\u65f6\uff0c\u2460\u811a\u7535\u538b\u5c06\u4e0b\u964d\uff0cr\u7aef\u7535\u538b\u4ea6\u968f\u4e4b\u4e0b\u964d\uff0c\u4e8e\u662f\u2465\u811a\u8109\u51b2\u53d8\u7a84\uff1b\u53cd\u4e4b\uff0c\u2465\u811a\u8109\u51b2\u53d8\u5bbd\u3002\u2462\u811a\u4e3a\u7535\u6d41\u4f20\u611f\u7aef\uff0c\u901a\u5e38\u5728\u529f\u7387\u7ba1\u7684\u6e90\u6781\u6216\u53d1\u5c04\u6781\u4e32\u5165\u4e00\u5c0f\u963b\u503c\u53d6\u6837\u7535\u963b\uff0c\u5c06\u6d41\u8fc7\u5f00\u5173\u7ba1\u7684\u7535\u6d41\u8f6c\u4e3a\u7535\u538b\uff0c\u5e76\u5c06\u6b64\u7535\u538b\u5f15\u5165\u5883\u811a\u3002\u5f53\u8d1f\u8f7d\u77ed\u8def\u6216\u5176\u5b83\u539f\u56e0\u5f15\u8d77\u529f\u7387\u7ba1\u7535\u6d41\u589e\u52a0\uff0c\u5e76\u4f7f\u53d6\u6837\u7535\u963b\u4e0a\u7684\u7535\u538b\u8d85\u8fc71v\u65f6\uff0c\u2465\u811a\u5c31\u505c\u6b62\u8109\u51b2\u8f93\u51fa\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u6709\u6548\u7684\u4fdd\u62a4\u529f\u7387\u7ba1\u4e0d\u53d7\u635f\u574f\u3002
“FET 控制极对地稳压管使用的是双向18V稳压管”－－－－使用双向稳压管作甚？单相即可。
in4148频率特性对付开关电源已经绰绰有余，唯电流特性可堪考虑。
开关管发热高，主要是没有进入饱和状态所致，可能是IC3842的输出对于你新换上的场效应管驱动不足引起。将那个150欧姆电阻减小些试试有无变化，若有变化即说明驱动不足。若无变化，还有可能是管子性能不佳。
3842输出脚串联的二极管是否需要使用高频二极管？？高手指点
绛旓細3842杈撳嚭涓茶仈鐨2鏈哄叧鏈涓昏鐨勪綔鐢ㄦ槸鐢ㄤ簬淇濇姢3842锛屼竾涓FET鎹熷潖锛岄珮鍘嬩笉浼氭帴鍒3842鍘伙紝
绛旓細1銆佷繚闄╀笣绠＄啍鏂細浠旂粏鏌ョ湅鐢佃矾鏉夸笂闈㈢殑鍚勪釜鍏冧欢锛岀湅杩欎簺鍏冧欢鐨勫琛ㄦ槸鍚﹁鐑х硦鎴栨湁鐢佃В娑叉孩鍑猴紝闂-闂绘湁鏃犲紓鍛筹紱鍐嶆祴閲忕數婧愯緭鍏ョ鐨勭數闃诲肩湅灞閮ㄧ煭璺幇璞★紱鐒跺悗鍐嶆祴閲忕數婧愭护娉㈢數瀹规槸鍚﹁兘杩涜姝ｅ父鍏呮斁鐢点佸紑鍏冲姛鐜囩鏄惁鍑荤┛鎹熷潖銆UC3842鍙婂懆鍥村厓浠舵槸鍚﹀嚮绌匡紝鐑у潖绛夛紝鑻ュ厓鍣ㄤ欢鏈夋崯鍧忔洿鎹㈠嵆鍙2銆佹棤鐩存祦鐢靛帇杈...
绛旓細2: 鐢垫簮涓嶅惎鍔:鎻掔數锛屽ぇ鐢靛2绔湁300V鐢靛帇锛屾嫈鎺夌數婧愶紝澶х數瀹圭數鍘嬫參鎱笅闄嶏紝灏嗙數璺澘鍏ㄩ儴妫鏌ユ槸鍚︽湁鑴辩剨鐨勭幇璞★紝琛ョ剨瀹屾垚鍚庯紝灏3842鎹㈡垚鏂扮殑锛岄氱數璇曟満鍗冲彲锛3锛氶棯鐏細鍏堝皢鐢佃矾鏉胯ˉ鐒婁竴閬嶏紝鍐嶆璇曟満锛屽鏋滆繕鏄棯鐏紝璇锋鏌杈撳嚭绔彇鏍风數闃汇0.1娆с3W鍔熺巼銆傛帴鍦ㄨ緭鍑虹嚎鐨勮礋鏋佺锛屽皢姝ょ數闃绘崲鏂板嵆鍙紝4...
绛旓細4 鐢垫簮娌℃湁鎸囩ず鐏紝寮鍏崇娌￠棶棰橈紝澶氭暟涓虹數婧愰┍鍔ㄧ數璺UC3842 鎹熷潖锛屾鏌ユ柟娉曪紝娴3842 7鑴氫緵鐢电數鍘嬩负15V宸﹀彸锛6鑴1-2V宸﹀彸娴姩锛8鑴5V杈撳嚭锛屽鏋滄弧瓒充笂杩3涓潯浠讹紝鍩烘湰鍙涓3842鏃犳晠闅滐紝鑻3842 鎹熷潖锛屽彲妫鏌ヤ緵鐢电數闃150K3W鐢甸樆鏈夋棤鎹熷潖锛5 濡傛灉琚洦姘存穻鍚庢崯鍧忥紝澶氭暟涓3842鎹熷潖锛8N60鎹熷潖 3842 6鑴氬埌...
绛旓細鏌ヨ捣鍔ㄧ數闃150k鏄惁鍧忎簡锛3842A..3842B宸笉澶
