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MOSFET浣滅偤涓昏鐨勯枊闂�(gu膩n)鍔熺巼鍣ㄤ欢涔嬩竴锛岃澶ч噺鎳�(y墨ng)鐢ㄤ簬妯″闆绘簮銆備簡瑙OSFET鐨勬悕鑰楃祫鎴愬苟灏嶅叾鍒嗘瀽锛屾湁鍒╀簬鍎�(y艒u)鍖朚OSFET鎼嶈€楋紝鎻愰珮妯″闆绘簮鐨勫姛鐜�锛涗絾鏄竴鍛崇殑娓涘皯MOSFET鐨勬悕鑰楀強鍏朵粬鏂归潰鐨勬悕鑰�锛屽弽鑰屾渻寮曡捣鏇村毚(y谩n)閲嶇殑EMI鍟忛锛屽皫(d菐o)鑷存暣鍊嬬郴绲�(t菕ng)涓嶈兘绌�(w臎n)瀹氬伐浣�銆傛墍浠ラ渶瑕佸湪娓涘皯MOSFET鐨勬悕鑰楃殑鍚屾檪闇€瑕佸吋椤фā濉婇浕婧愮殑EMI鎬ц兘銆�

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MOSFET鐨勬悕鑰椾富瑕佹湁浠ヤ笅閮ㄥ垎绲勬垚锛�1.閫氭厠(t脿i)鎼嶈€�锛�2.灏�(d菐o)閫氭悕鑰�锛�3.闂�(gu膩n)鏂锋悕鑰楋紱4.椹�(q奴)鍕曟悕鑰�锛�5.鍚告敹鎼嶈€楋紱闅ㄨ憲妯″闆绘簮鐨勯珨绌嶆笡灏�锛岄渶瑕佸皣闁嬮棞(gu膩n)闋荤巼閫�(j矛n)涓€姝ユ彁楂�锛岄€�(j矛n)鑰屽皫(d菐o)鑷撮枊閫氭悕鑰楀拰闂�(gu膩n)鏂锋悕鑰楃殑澧炲姞锛屼緥濡�300kHz鐨勯﹨(q奴)鍕曢牷鐜囦笅锛岄枊閫氭悕鑰楀拰闂�(gu膩n)鏂锋悕鑰楃殑姣斾緥宸茬稉(j墨ng)鏄附鎼嶈€椾富瑕侀儴鍒嗕簡銆�

MOSFET灏�(d菐o)閫氳垏闂�(gu膩n)鏂烽亷绋嬩腑閮芥渻鐢�(ch菐n)鐢熸悕鑰楋紝鍦ㄩ€欏叐鍊嬭綁(zhu菐n)鎻涢亷绋嬩腑锛屾紡妤甸浕澹撹垏婕忔サ闆绘祦銆佹煹婧愰浕澹撹垏闆昏嵎涔嬮枔鐨勯棞(gu膩n)绯诲鍦�1鍜屽湒2鎵€绀�锛岀従(xi脿n)浠ュ皫(d菐o)閫氳綁(zhu菐n)鎻涢亷绋嬬偤渚嬮€�(j矛n)琛屽垎鏋愶細

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t1-t2鍗€(q奴)闁擄細鏌垫サ闆诲閬�(d谩)鍒癡th锛屾紡妤甸浕娴両D闁嬪澧炲姞锛屽埌t2鏅傚埢閬�(d谩)鍒版渶澶у€�锛屼絾鏄紡婧愰浕澹撲繚鎸佹埅姝㈡檪楂橀浕骞充笉璁�锛屽緸鍦�1鍙互鐪嬪嚭锛屾閮ㄥ垎鏈塚DS鑸嘔D鏈夐噸鐤�锛孧OSFET鍔熻€楀澶э紱

t2-t3鍗€(q奴)闁擄細寰瀟2鏅傚埢闁嬪锛屾紡婧愰浕澹揤DS闁嬪涓嬮檷锛屽紩璧峰瘑鍕掗浕瀹规晥鎳�(y墨ng)锛屼娇寰楁煹妤甸浕澹撲笉鑳戒笂鍗囪€屽嚭鐝�(xi脿n)骞宠嚭锛宼2-t3鏅傚埢闆昏嵎閲忕瓑浜嶲gd锛宼3鏅傚埢闁嬪婕忔サ闆诲涓嬮檷鍒版渶灏忓€硷紱姝ら儴鍒嗘湁VDS鑸嘔D鏈夐噸鐤�锛孧OSFET鍔熻€楀澶�

t3-t4鍗€(q奴)闁擄細鏌垫サ闆诲寰炲钩鑷轰笂鍗囪嚦鏈€鍚庣殑椹�(q奴)鍕曢浕澹擄紙妯″闆绘簮涓€鑸ō(sh猫)瀹氱偤12V锛夛紝涓婂崌鐨勬煹澹撲娇灏�(d菐o)閫氶浕闃婚€�(j矛n)涓€姝ユ笡灏�锛孧OSFET閫�(j矛n)鍏ュ畬鍏ㄥ皫(d菐o)閫氱媭鎱�(t脿i)锛涙鏅傛悕鑰楄綁(zhu菐n)鍖栫偤灏�(d菐o)閫氭悕鑰�銆�

闂�(gu膩n)鏂烽亷绋嬭垏灏�(d菐o)閫氶亷绋嬬浉浼�锛屽彧涓嶉亷鏄尝褰㈢浉鍙嶈€屽凡锛涢棞(gu膩n)浜嶮OSFET鐨勫皫(d菐o)閫氭悕鑰楄垏闂�(gu膩n)鏂锋悕鑰楃殑鍒嗘瀽閬庣▼锛屾湁寰堝鏂囩嵒(xi脿n)鍙互鍙冭€冿紝閫欓噷鐩存帴寮曠敤銆婂嫉鑸堟煴涔婱OSFET鍒嗘瀽銆嬬殑绺界祼(ji茅)鍏紡濡備笅锛�

鍌欐敞锛� 鐐轰笂鍗囨檪闁�锛� 鐐洪枊闂�(gu膩n)闋荤巼锛�  鐐轰笅闄嶆檪闁�锛岀偤鏌垫サ闆昏嵎锛岀偤鏌垫サ椹�(q奴)鍕曢浕澹� 鐐篗OSFET楂斾簩妤电鎼嶈€�銆�

涓�銆丮OSFET鐨勬悕鑰楀劒(y艒u)鍖栨柟娉曞強鍏跺埄寮婇棞(gu膩n)绯�

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寰濵OSFET鐨勬悕鑰楀垎鏋愬彲浠ョ湅鍑�锛岄枊闂�(gu膩n)闆绘簮鐨勯﹨(q奴)鍕曢牷鐜囪秺楂�锛屽皫(d菐o)閫氭悕鑰椼€侀棞(gu膩n)鏂锋悕鑰楀拰椹�(q奴)鍕曟悕鑰楁渻鐩告噳(y墨ng)澧炲ぇ锛屼絾鏄珮闋诲寲鍙互浣垮緱妯″闆绘簮鐨勮畩澹撳櫒纾佽姱鏇村皬锛屾ā濉婄殑楂旂⿳璁婂緱鏇村皬锛屾墍浠ュ彲浠ラ€氶亷闁嬮棞(gu膩n)闋荤巼鍘诲劒(y艒u)鍖栭枊閫氭悕鑰�銆侀棞(gu膩n)鏂锋悕鑰楀拰椹�(q奴)鍕曟悕鑰楋紝浣嗘槸楂橀牷鍖栧嵒鏈冨紩璧峰毚(y谩n)閲嶇殑EMI鍟忛銆傞噾鍗囬櫧DC/DC R3鐢�(ch菐n)鍝侊紝閲囩敤璺抽牷鎺у埗鏂规硶锛屽湪杓曡矤(f霉)杓夋儏娉佷笅锛岄€氶亷闄嶄綆妯″闆绘簮鐨勯枊闂�(gu膩n)闋荤巼渚嗛檷浣庨﹨(q奴)鍕曟悕鑰�锛屽緸鑰岄€�(j矛n)涓€姝ユ彁楂樿紩璨�(f霉)杓夋浠朵笅鐨勬晥鐜�锛屼娇寰楃郴绲�(t菕ng)鍦ㄥ緟姗�(j墨)宸ヤ綔涓�锛屾洿绡€(ji茅)鑳�锛岄€�(j矛n)涓€姝ユ彁楂樿搫闆绘睜渚涢浕绯荤当(t菕ng)鐨勫伐浣滄檪闁擄紝骞朵笖閭勮兘澶犻檷浣嶦MI鐨勮蓟灏勫晱椤�锛�

3-2.閫氶亷闄嶄綆銆佷締娓涘皯MOSFET鐨勬悕鑰�

鍏稿瀷鐨勫皬鍔熺巼妯″闆绘簮锛堝皬浜�50锛凤級澶у閲囩敤鐨勯浕璺嫇?f霉)娴(ji茅)妲�(g貌u)鐐哄弽婵€褰㈠紡锛屽吀鍨嬬殑鎺у埗闆昏矾濡傚湒锛撴墍绀�锛涘緸MOSFET鐨勬悕鑰楀垎鏋愰倓鍙互鐭ラ亾锛氳垏闁嬮€氭悕鑰楁垚姝ｆ瘮銆佽垏闂�(gu膩n)鏂锋悕鑰楁垚姝ｆ瘮锛涙墍浠ュ彲浠ラ€氶亷娓涘皯 銆佷締娓涘皯MOSFET鐨勬悕鑰�锛岄€氬父鎯呮硜涓嬶紝鍙互娓涘皬MOSFET鐨勯﹨(q奴)鍕曢浕闃籖g渚嗘笡灏�銆佹檪闁擄紝浣嗘槸姝ゅ劒(y艒u)鍖栨柟娉曞嵒甯朵締鍤�(y谩n)閲嶇殑EMI鍟忛锛涗互閲戝崌闄経RB2405YMD-6WR3鐢�(ch菐n)鍝佺偤渚嬩締瑾槑姝ら爡鍟忛锛�

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3-3.閫氶亷闄嶄綆鍚告敹闆昏矾鎼嶈€椾締娓涘皯鎼嶈€�

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鍥�銆佺附绲�(ji茅) 

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