我用LM317，LM337做一个正负可调电源。电位器调到0了。LM337的1、2脚间电压为-18伏。求帮助 LM317和LM337双输出直流稳压电源两端如何接地?
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\u75282\u4e2a\u7535\u963b+LM337\u505a\u4e00\u4e2a-15V\u7535\u6e90\uff1b
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\u5177\u4f53LM337\u53caLM317\u82af\u7247\u53ca\u5de5\u4f5c\u539f\u7406\u5927\u5bb6\u53ef\u4ee5\u67e5\u8be2\u82af\u7247datasheet\u6570\u636e\u624b\u518c\u3002\u5c24\u5176\u8981\u5206\u522b\u6ce8\u610fLM337\u4e0eLM317\u4e09\u4e2a\u5f15\u811a\u7684\u4f4d\u7f6e\u3002
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\u53ef\u5229\u7528Protel 99se \u6216DXP 2004\u5236\u5f97PCB\u677f\uff0c\u7136\u540e\u5c06\u4ee5\u4e0a\u5143\u5668\u4ef6\u6309\u7535\u8def\u539f\u7406\u56fe\u710a\u63a5\u5373\u53ef\u3002
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\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1\u2014\u2014lm317
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a \u767e\u5ea6\u767e\u79d1\u2014\u2014lM337
\u53d8\u538b\u5668\u7684\u4e2d\u95f4\u90a3\u6761\u7ebf\u5c31\u662f\u5730\u7ebf\uff0cLM317\u548cLM337\u7684\u5730\u4e5f\u662f\u63a5\u5728\u90a3\u91cc\u7684\u3002
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你管脚有没有接错啊，接错了电压就不可调了，再看一下PCB板。
绛旓細浣跨敤LM317 鍋0-24V鍙皟鐩存祦绋冲帇鐢垫簮锛屾瘮杈冨洶闅锛屽仛涓涓1.25V-24V鍙皟鐩存祦绋冲帇鐢垫簮锛岀數璺嵈闈炲父绠鍗曘傝繖鏄洜涓篖M317鍙皟涓夌绋冲帇鍣紝鏈灏忚緭鍑虹數鍘嬪湪1.25V锛屽鏋滆姹傝繖涓ǔ鍘嬬數婧愪粠0V璧疯皟锛岃繖涓ǔ鍘嬬數璺氨闇瑕佸姞鍏ヤ竴涓礋鐢靛帇锛岀數婧愯緭鍏ュ氨闇瑕佹銆佽礋涓庡湴涓変釜杈撳叆绔簡锛岀浉瀵圭數璺瘮杈冨鏉傦紝涓鑸ǔ鍘嬬數婧愭槸...
绛旓細浣犲彲浠鐢↙M317鍜LM337鍏卞悓缁勬垚姝ｈ礋15V銆傛5V鐩存帴浣跨敤7805鍗冲彲銆傜數婧愰夌敤浜ゆ祦杈撳嚭鍙18V缁曠粍+8V缁曠粍鐨勫彉鍘嬪櫒鍗冲彲锛屽姛鐜囬30W宸﹀彸銆傚弬鑰冭繖涓瓟妗 http://zhidao.baidu.com/question/363738028.html 娉ㄦ剰锛丩M317涓嶭M337绠¤剼鎺掑垪涓嶄竴鏍凤紒LM317___(1)璋冭妭銆侊紙2锛夎緭鍑 锛3锛夎緭鍏ャ侺M337鈥斺斺旓紙1锛夎皟鑺傦紝 ...
绛旓細78绯诲垪鍣ㄤ欢鏄浐瀹氳緭鍑虹殑绾挎хǔ鍘嬪櫒锛岃緭鍑轰笉鍙皟锛岀敤鐢典綅鍣ㄥ疄鐜拌緭鍑虹數鍘嬭皟鑺傚湪璐熻浇鍙樺寲鏃舵棤娉曚繚鎸佽緭鍑虹數鍘嬬殑绋冲畾锛屾墍浠ラ氬父鐢ㄨ緭鍑哄彲璋冪殑绾挎хǔ鍘嬪櫒LM317锛堟鐢靛帇锛夊拰LM337锛堣礋鐢靛帇锛夊疄鐜拌緭鍑虹數鍘嬭皟鑺傘
绛旓細涓嶅彲浠ワ紒鍘嬮檷澶ф椂鏁堢巼鐧句綆涓斿彂鐑噺澶э紝鍙敤鑺墖搴 1銆侀檷鍘嬭姱鐗 LM2576S-ADJ / LM2596S-Adj 鍙互杈撳嚭1.23锝37V(HV鍨嬪彿57V)涔嬮棿鐨勪换浣曞笺傜増淇濊瘉鏉3.0A杈撳嚭鐢垫祦銆2銆乀PS40050銆乀PS40051銆乀PS40053鐨勮祫鏂欙紝杈撳嚭鐢靛帇鍦0锝30V鍙皟鐨勶紝鐢垫祦10A锛屽姛鐜300W浠ヤ笂銆傜瓑绛夈
绛旓細鎵嬫満鐗 鎴戠殑鐭ラ亾 LM317绠鏄撶洿娴佸彲璋冪ǔ鍘嬬數婧愮殑鍒朵綔 鐜版湁1501T鐨勭洅瀛,琛ㄥご鍏ㄦ槸濂界殑,浣嗙數婧愭澘鍜屽彉鍘嬪櫒娌℃湁,鎵嬪ご鏈夌洿鎻LM317涓涓LM337涓涓4007涓鍫12V缁х數鍣ㄤ竴涓5K銆佹垨50K鐢典綅鍣ㄥ悇涓や笁涓傚彉鍘嬪櫒10.3V8.3V9.15V(鍙兘鏄釜VCD涓婃媶鐨,杈... 鐜版湁1501T鐨勭洅瀛,琛ㄥご鍏ㄦ槸濂界殑,浣嗙數婧愭澘鍜屽彉鍘嬪櫒娌℃湁,鎵嬪ご鏈夌洿鎻扡M317 ...
绛旓細鐢ㄥ弻20V甯︿腑蹇冩娊澶寸殑鍙樺帇鍣紝杈撳嚭绔殑涓績鎶藉ご鎺ュ湴锛屽彟澶栦袱鏍圭嚎缁忚繃妗ュ紡鏁存祦寰楀埌姝ｈ礋18V浠ヤ笂鐨勭數鍘(鏁存祦鍚庣殑鐢靛帇鑼冨洿澶х害鍦18V鑷32V涔嬮棿)锛岀敱4700uF35V浠ヤ笂鐨勭數瀹规护娉紝鍐嶇粡杩LM317銆LM337绋冲帇锛屾寜鐓ц繖涓ょ鑺墖鐨勬爣鍑嗘帴娉曟帴绾匡紝鐢ㄧ數闃昏皟鏁磋嚦姝ｈ礋15V銆 LM317鍜孡M337瑕佺敤鏁ｇ儹鐗囧姞寮烘暎鐑紝鍚勮嚜鐨勬暎鐑兘鍔涘繀椤...
绛旓細鍙樺帇鍣ㄧ殑涓棿閭ｆ潯绾垮氨鏄湴绾锛孡M317鍜LM337鐨勫湴涔熸槸鎺ュ湪閭ｉ噷鐨勩傝兘涓鸿礋杞芥彁渚涚ǔ瀹氱洿娴佺數婧愮殑鐢靛瓙瑁呯疆銆傜洿娴佺ǔ鍘嬬數婧愮殑渚涚數鐢垫簮澶ч兘鏄氦娴佺數婧愶紝褰撲氦娴佷緵鐢电數婧愮殑鐢靛帇鎴栬礋杞界數闃诲彉鍖栨椂锛岀ǔ鍘嬪櫒鐨勭洿娴佽緭鍑虹數鍘嬮兘浼氫繚鎸佺ǔ瀹氥 鐩存祦绋冲帇鐢垫簮闅忕潃鐢靛瓙璁惧鍚戦珮绮惧害銆侀珮绋冲畾鎬у拰楂樺彲闈犳х殑鏂瑰悜鍙戝睍锛屽鐢靛瓙璁惧鐨勪緵鐢...
绛旓細鍗曡濂界殑璇濆綋鐒舵槸117濂戒簡,瀹冪殑娓╁害閫傚簲鑼冨洿姣317杩樺ぇ,鏈変汉璇村畠鏄啗鐢ㄥ搧,绋冲帇涓庤皟鍘嬫ц兘涓317宸笉澶,337鏄礋鍘嬭皟鑺傜殑.
绛旓細50W鐨勫姛鏀剧敤锛堟璐6V=12V锛変緵鐢垫椂锛屾渶澶х數娴佹槸50W梅12V=4A宸﹀彸锛岋紙浣曞喌宸﹀彸澹伴亾涓よ矾锛夈傝LM317銆337鐨勬渶澶х數娴佹槸1.5A銆備細鐑х殑鍝熴
绛旓細LM337銆LM317鐨鏈澶ц緭鍑虹數娴佹槸1.5A锛屾璐17V鐨勬櫠浣撶鍔熸斁婊″姛鐜囪緭鍑烘椂鐨勫嘲鍊肩數娴佽揪2A锛屾墍浠M337 LM317缁勬垚鐨勭數婧愪笉澶悎閫傛媴浠昏繖涓姛鏀剧殑鐢垫簮銆傚啀鏄35W鐨勫彉鍘嬪櫒涔熷皬浜嗕簺銆傚叧浜庡彂鐑棶棰锛屼竴鏄姛鑰楃殑澶у皬鐨勯棶棰橈紝浜屾槸鏁ｇ儹鍣ㄥぇ灏忎笉涓鐨勯棶棰樸傚姛鑰楅棶棰樺湪浜庣瀛愪笂鐨勭數鍘嬪拰绠″瓙涓殑鐢垫祦鍐冲畾鐨勶細P=U*I 18V...
