{"id":6536,"date":"2018-12-13T04:52:21","date_gmt":"2018-12-13T04:52:21","guid":{"rendered":"https:\/\/hocvienit.vn\/?p=6536"},"modified":"2024-07-03T16:19:08","modified_gmt":"2024-07-03T09:19:08","slug":"the-na0-la-mosfet-cong-suat","status":"publish","type":"post","link":"https:\/\/hocvienit.vn\/?p=6536","title":{"rendered":"C\u00f3 th\u1ec3 b\u1ea1n ch\u01b0a bi\u1ebft: Th\u1ebf n\u00e0o l\u00e0 mosfet c\u00f4ng su\u1ea5t?"},"content":{"rendered":"

Mosfet l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n v\u00e0 r\u1ea5t quen thu\u1ed9c \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi l\u00e0m ngh\u1ec1 k\u1ef9 thu\u1eadt \u0111i\u1ec7n t\u1eed. V\u1eady mosfet c\u00f4ng su\u1ea5t l\u00e0 g\u00ec? C\u00f9ng H\u1ecdc vi\u1ec7n iT t\u00ecm hi\u1ec3u qua b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y.<\/span><\/p>\n

\"Th\u1ebf
Th\u1ebf n\u00e0o l\u00e0 mosfet c\u00f4ng su\u1ea5t l\u1edbn?<\/figcaption><\/figure>\n

Nh\u1eefng \u0111i\u1ec3m c\u01a1 b\u1ea3n v\u1ec1 mosfet c\u00f4ng su\u1ea5t<\/span><\/h2>\n

C\u1ea5u t\u1ea1o c\u1ee7a mosfet c\u00f4ng su\u1ea5t<\/span><\/h3>\n

Kh\u00e1c v\u1edbi BJT, Mosfet<\/a> c\u00f3 c\u1ea5u tr\u00fac b\u00e1n d\u1eabn cho ph\u00e9p \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng \u0111i\u1ec7n \u00e1p v\u1edbi d\u00f2ng \u0111i\u1ec7n \u0111i\u1ec1u khi\u1ec3n c\u1ef1c nh\u1ecf. C\u1ea5u t\u1ea1o c\u1ee7a Mosfet ng\u01b0\u1ee3c K\u00eanh N:<\/span><\/p>\n

G : Gate g\u1ecdi l\u00e0 c\u1ef1c c\u1ed5ng <\/span><\/p>\n

S : Source g\u1ecdi l\u00e0 c\u1ef1c ngu\u1ed3n <\/span><\/p>\n

D : Drain g\u1ecdi l\u00e0 c\u1ef1c m\u00e1ng<\/span><\/p>\n

 <\/p>\n

Trong \u0111\u00f3: G l\u00e0 c\u1ef1c \u0111i\u1ec1u khi\u1ec3n \u0111\u01b0\u1ee3c c\u00e1ch l\u00fd ho\u00e0n to\u00e0n v\u1edbi c\u1ea5u tr\u00fac b\u00e1n d\u1eabn c\u00f2n l\u1ea1i b\u1edfi l\u1edbp \u0111i\u1ec7n m\u00f4i c\u1ef1c m\u1ecfng nh\u01b0ng c\u00f3 \u0111\u1ed9 c\u00e1ch \u0111i\u1ec7n c\u1ef1c l\u1edbn dioxit-silic (Sio2). Hai c\u1ef1c c\u00f2n l\u1ea1i l\u00e0 c\u1ef1c g\u1ed1c (S) v\u00e0 c\u1ef1c m\u00e1ng (D). C\u1ef1c m\u00e1ng l\u00e0 c\u1ef1c \u0111\u00f3n c\u00e1c h\u1ea1t mang \u0111i\u1ec7n. Mosfet c\u00f3 \u0111i\u1ec7n tr\u1edf gi\u1eefa c\u1ef1c G v\u1edbi c\u1ef1c S v\u00e0 gi\u1eefa c\u1ef1c G v\u1edbi c\u1ef1c D l\u00e0 v\u00f4 c\u00f9ng l\u1edbn , c\u00f2n \u0111i\u1ec7n tr\u1edf gi\u1eefa c\u1ef1c D v\u00e0 c\u1ef1c S ph\u1ee5 thu\u1ed9c v\u00e0o \u0111i\u1ec7n \u00e1p ch\u00eanh l\u1ec7ch gi\u1eefa c\u1ef1c G v\u00e0 c\u1ef1c S ( UGS ).<\/span><\/p>\n

 <\/p>\n

K\u00fd hi\u1ec7u c\u1ee7a mosfet c\u00f4ng su\u1ea5t<\/span><\/h3>\n
\"C\u1ea5u
C\u1ea5u t\u1ea1o c\u1ee7a Transistor<\/figcaption><\/figure>\n

Qua \u0111\u00f3 ta th\u1ea5y Mosfet n\u00e0y c\u00f3 ch\u00e2n t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi Transistor:<\/span><\/p>\n

– Ch\u00e2n G t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi B<\/span><\/p>\n

– Ch\u00e2n D t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi ch\u00e2n C<\/span><\/p>\n

– Ch\u00e2n S t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi E<\/span><\/p>\n

 <\/p>\n

Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a mosfet c\u00f4ng su\u1ea5t<\/span><\/h3>\n

Mosfet ho\u1ea1t \u0111\u1ed9ng \u1edf 2 ch\u1ebf \u0111\u1ed9 \u0111\u00f3ng v\u00e0 m\u1edf. Do l\u00e0 m\u1ed9t ph\u1ea7n t\u1eed v\u1edbi c\u00e1c h\u1ea1t mang \u0111i\u1ec7n c\u01a1 b\u1ea3n n\u00ean Mosfet c\u00f3 th\u1ec3 \u0111\u00f3ng c\u1eaft v\u1edbi t\u1ea7n s\u1ed1 r\u1ea5t cao. Nh\u01b0ng m\u00e0 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o th\u1eddi gian \u0111\u00f3ng c\u1eaft ng\u1eafn th\u00ec v\u1ea5n \u0111\u1ec1 \u0111i\u1ec1u khi\u1ec3n l\u1ea1i l\u00e0 v\u1ea5n \u0111\u1ec1 quan tr\u1ecdng.<\/span><\/p>\n

M\u1ea1ch \u0111i\u1ec7n t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u1ee7a Mosfet . Nh\u00ecn v\u00e0o \u0111\u00f3 ta th\u1ea5y c\u01a1 ch\u1ebf \u0111\u00f3ng c\u1eaft ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c t\u1ee5 \u0111i\u1ec7n k\u00fd sinh tr\u00ean n\u00f3.<\/span><\/p>\n

– \u0110\u1ed1i v\u1edbi k\u00eanh P: \u0110i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n m\u1edf Mosfet l\u00e0 Ugs = 0. D\u00f2ng \u0111i\u1ec7n s\u1ebd \u0111i t\u1eeb S \u0111\u1ebfn D<\/span><\/p>\n

– \u0110\u1ed1i v\u1edbi k\u00eanh N: \u0110i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n m\u1edf Mosfet l\u00e0 Ugs >0. \u0110i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n \u0111\u00f3ng l\u00e0 Ugs <=0. D\u00f2ng \u0111i\u1ec7n s\u1ebd \u0111i t\u1eeb D xu\u1ed1ng S.<\/span><\/p>\n

Do \u0111\u1ea3m b\u1ea3o th\u1eddi gian \u0111\u00f3ng c\u1eaft l\u00e0 ng\u1eafn nh\u1ea5t ng\u01b0\u1eddi ta th\u01b0\u1eddng : \u0110\u1ed1i v\u1edbi Mosfet K\u00eanh N \u0111i\u1ec7n \u00e1p kh\u00f3a l\u00e0 Ugs = 0 V c\u00f2n \u00a0K\u00eanh P th\u00ec Ugs = ~0.<\/span><\/p>\n

>>> C\u00f3 th\u1ec3 b\u1ea1n mu\u1ed1n bi\u1ebft: B\u1ea3ng t\u1ed5ng h\u1ee3p c\u00e1c lo\u1ea1i mosfet th\u00f4ng d\u1ee5ng<\/em><\/a><\/p>\n

 <\/p>\n

C\u00e1c th\u00f4ng s\u1ed1 th\u1ec3 hi\u1ec7n kh\u1ea3 n\u0103ng \u0111\u00f3ng c\u1eaft c\u1ee7a Mosfet<\/span><\/h3>\n

Th\u1eddi gian tr\u1ec5 khi \u0111\u00f3ng\/m\u1edf kh\u00f3a ph\u1ee5 thu\u1ed9c gi\u00e1 tr\u1ecb c\u00e1c t\u1ee5 k\u00ed sinh Cgs.Cgd,Cds. Tuy nhi\u00ean c\u00e1c th\u00f4ng s\u1ed1 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c cho d\u01b0\u1edbi d\u1ea1ng tr\u1ecb s\u1ed1 t\u1ee5 Ciss, Crss,Coss. Nh\u01b0ng d\u01b0\u1edbi \u0111i\u1ec1u ki\u1ec7n nh\u1ea5t \u0111inh nh\u01b0 l\u00e0 \u0111i\u1ec7n \u00e1p Ugs v\u00e0 Uds. Ta c\u00f3 th\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb c\u00e1c t\u1ee5 \u0111\u00f3<\/span><\/p>\n

 <\/p>\n

Mosfet c\u00f4ng su\u1ea5t v-mos v\u00e0 d-mos<\/span><\/h2>\n

C\u00e1c transistor tr\u01b0\u1eddng \u1ee9ng (j-fet v\u00e0 mosfet) m\u00e0 ta \u0111\u00e3 kh\u1ea3o s\u00e1t \u1edf tr\u00ean ch\u1ec9 th\u00edch h\u1ee3p cho c\u00e1c m\u1ea1ch c\u00f3 bi\u00ean \u0111\u1ed9 t\u00edn hi\u1ec7u nh\u1ecf nh\u01b0 ti\u1ec1n khu\u1ebfch \u0111\u1ea1i, tr\u1ed9n s\u00f3ng, khu\u1ebfch \u0111\u1ea1i cao t\u1ea7n, trung t\u1ea7n, dao \u0111\u1ed9ng\u2026 N\u0103m 1976, ng\u01b0\u1eddi ta ph\u00e1t minh ra lo\u1ea1i transistor tr\u01b0\u1eddng c\u00f3 c\u00f4ng su\u1ea5t v\u1eeba, \u0111\u1ebfn l\u1edbn v\u1edbi kh\u1ea3 n\u0103ng d\u00f2ng tho\u00e1t \u0111\u1ebfn v\u00e0i ch\u1ee5c ampere v\u00e0 c\u00f4ng su\u1ea5t c\u00f3 th\u1ec3 l\u00ean \u0111\u1ebfn v\u00e0i ch\u1ee5c Watt.<\/span><\/p>\n

 <\/p>\n

Mosfet c\u00f4ng su\u1ea5t V-mos<\/span><\/h3>\n

Th\u1eadt ra \u0111\u00e2y l\u00e0 m\u1ed9t lo\u1ea1i e-mosfet c\u1ea3i ti\u1ebfn, c\u0169ng l\u00e0 kh\u00f4ng c\u00f3 s\u1eb5n th\u00f4ng l\u1ed9 v\u00e0 \u0111i\u1ec1u h\u00e0nh theo ki\u1ec3u t\u0103ng. s\u1ef1 kh\u00e1c nhau v\u1ec1 c\u1ea5u tr\u00fac e-mosfet v\u00e0 v-mos \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y b\u1eb1ng h\u00ecnh v\u1ebd sau:<\/span><\/p>\n


\nKhi VGS d\u01b0\u01a1ng v\u00e0 l\u1edbn h\u01a1n VGS(th), th\u00f4ng l\u1ed9 \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh d\u1ecdc theo r\u00e3nh V v\u00e0 d\u00f2ng electron s\u1ebd ch\u1ea1y th\u1eb3ng t\u1eeb hai ngu\u1ed3n S \u0111\u1ebfn c\u1ef1c tho\u00e1t D. V\u00ec l\u00fd do n\u00e0y n\u00ean \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 v-mos (Vertical MOSFET).<\/span><\/p>\n

 <\/p>\n

Mosfet c\u00f4ng su\u1ea5t D-mos<\/span><\/h3>\n

C\u0169ng l\u00e0 m\u1ed9t lo\u1ea1i E-MOSFET ho\u1ea1t \u0111\u1ed9ng theo ki\u1ec3u t\u0103ng, \u1ee9ng d\u1ee5ng hi\u1ec7n t\u01b0\u1ee3ng khu\u1ebfch t\u00e1n \u0111\u00f4i (double-diffused) n\u00ean \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 D-MOS. C\u00f3 c\u1ea5u tr\u00fac nh\u01b0 sau:<\/span><\/p>\n


\nC\u00e1c \u0111\u1eb7c t\u00ednh ho\u1ea1t \u0111\u1ed9ng c\u1ee7a v-mos v\u00e0 d-mos c\u0169ng gi\u1ed1ng nh\u01b0 e-mosfet. Ngo\u00e0i ra, c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ri\u00eang c\u1ee7a v-mos v\u00e0 d-mos l\u00e0:<\/span><\/p>\n

– \u0110i\u1ec7n tr\u1edf \u0111\u1ed9ng rds khi ho\u1ea1t \u0111\u1ed9ng r\u1ea5t nh\u1ecf (th\u01b0\u1eddng nh\u1ecf h\u01a1n 1)<\/span><\/p>\n

– C\u00f3 th\u1ec3 khu\u1ebfch \u0111\u1ea1i c\u00f4ng su\u1ea5t \u1edf t\u1ea7n s\u1ed1 r\u1ea5t cao<\/span><\/p>\n

– D\u1ea3i th\u00f4ng c\u1ee7a m\u1ea1ch khu\u1ebfch \u0111\u1ea1i c\u00f4ng su\u1ea5t c\u00f3 th\u1ec3 l\u00ean \u0111\u1ebfn v\u00e0i ch\u1ee5c MHz<\/span><\/p>\n

– v-mos v\u00e0 d-mos c\u0169ng c\u00f3 k\u00eanh N v\u00e0 k\u00eanh P. Tuy nhi\u00ean k\u00eanh N th\u00f4ng d\u1ee5ng h\u01a1n<\/span><\/p>\n

– <\/span>V-mos v\u00e0 d-mos c\u0169ng c\u00f3 k\u00fd hi\u1ec7u nh\u01b0 e-mosfet<\/span><\/p>\n

 <\/p>\n

H\u1ecd FET c\u00f3 th\u1ec3 t\u00f3m t\u1eaft nh\u01b0 sau<\/strong><\/p>\n


\nTr\u00ean \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 chia s\u1ebb v\u1ec1 mosfet c\u00f4ng su\u1ea5t c\u1ee7a HocvieniT.vn. Hy v\u1ecdng nh\u1eefng th\u00f4ng tin n\u00e0y s\u1ebd l\u00e0 ngu\u1ed3n t\u00e0i li\u1ec7u tham kh\u1ea3o qu\u00fd gi\u00e1 gi\u00fap \u00edch cho c\u00e1c b\u1ea1n trong c\u00f4ng vi\u1ec7c c\u1ee7a m\u00ecnh. M\u1ecdi v\u1ea5n \u0111\u1ec1 th\u1eafc m\u1eafc c\u1ea7n \u0111\u01b0\u1ee3c gi\u1ea3i \u0111\u00e1p vui l\u00f2ng li\u00ean h\u1ec7 theo s\u1ed1 Hotline 0981 223 001<\/strong> ho\u1eb7c g\u1eedi tin nh\u1eafn \u0111\u1ebfn trang facebook ch\u00ednh th\u1ee9c c\u1ee7a HocvieniT.vn. Ch\u00fac c\u00e1c b\u1ea1n th\u00e0nh c\u00f4ng!<\/span><\/p>\n

 <\/p>\n

M\u1ecdi chi ti\u1ebft xin vui l\u00f2ng li\u00ean h\u1ec7:<\/i><\/p>\n

C\u00d4NG TY C\u1ed4 PH\u1ea6N H\u1eccC VI\u1ec6N IT<\/strong>
\nMST: 0108733789<\/strong>
\nT\u1ed5ng \u0111\u00e0i h\u1ed7 tr\u1ee3: 024 3566 8686 \u2013 Hotline: 0981 223 001<\/strong>
\nFacebook:<\/strong>\u00a0www.fb.com\/hocvienit<\/a><\/p>\n

\u0110\u0103ng k\u00fd k\u00eanh Youtube \u0111\u1ec3 theo d\u00f5i c\u00e1c b\u00e0i h\u1ecdc c\u1ee7a Hu\u1ea5n luy\u1ec7n vi\u00ean t\u1ed1t nh\u1ea5t:<\/strong>\u00a0http:\/\/bit.ly\/Youtube_HOCVIENiT<\/a><\/p>\n

Tham gia c\u1ed9ng \u0111\u1ed3ng H\u1ecdc vi\u1ec7n IT.vn t\u1ea1i:<\/strong>\u00a0https:\/\/www.facebook.com\/groups\/www.hocvienit.vn\/<\/a><\/p>\n

Tr\u1ee5 s\u1edf H\u00e0 N\u1ed9i:<\/strong>\u00a0S\u1ed1 8 ng\u00f5 117 Th\u00e1i H\u00e0, \u0110\u1ed1ng \u0110a, H\u00e0 N\u1ed9i<\/p>\n

H\u1ed3 Ch\u00ed Minh:<\/strong>\u00a0S\u1ed1 283\/45 C\u00e1ch M\u1ea1ng Th\u00e1ng T\u00e1m, Ph\u01b0\u1eddng 12, Qu\u1eadn 10,\u00a0TP.HCM
\nH\u1ea3i Ph\u00f2ng:<\/strong>\u00a0S\u1ed1 94 Qu\u00e1n Nam, L\u00ea Ch\u00e2n, H\u1ea3i Ph\u00f2ng<\/p>\n

Th\u00e1i Nguy\u00ean:<\/strong>\u00a0S\u1ed1 297 L\u01b0\u01a1ng Ng\u1ecdc Quy\u1ebfn, TP. Th\u00e1i Nguy\u00ean
\nH\u1ecdc vi\u1ec7n IT.vn \u2013 Truy\u1ec1n ngh\u1ec1 th\u1ef1c t\u1ebf c\u00f9ng b\u1ea1n \u0111\u1ebfn th\u00e0nh c\u00f4ng!\u00a0<\/i><\/strong><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Kh\u00e1c v\u1edbi BJT, Mosfet c\u00f3 c\u1ea5u tr\u00fac b\u00e1n d\u1eabn cho ph\u00e9p \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng \u0111i\u1ec7n \u00e1p v\u1edbi d\u00f2ng \u0111i\u1ec7n \u0111i\u1ec1u khi\u1ec3n c\u1ef1c nh\u1ecf. Mosfet ho\u1ea1t \u0111\u1ed9ng \u1edf 2 ch\u1ebf \u0111\u1ed9 \u0111\u00f3ng v\u00e0 m\u1edf. Do l\u00e0 m\u1ed9t ph\u1ea7n t\u1eed v\u1edbi c\u00e1c h\u1ea1t mang \u0111i\u1ec7n c\u01a1 b\u1ea3n n\u00ean Mosfet c\u00f3 th\u1ec3 \u0111\u00f3ng c\u1eaft v\u1edbi t\u1ea7n s\u1ed1 r\u1ea5t cao…<\/p>\n","protected":false},"author":95,"featured_media":12629,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96,94],"tags":[498],"_links":{"self":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/6536"}],"collection":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/users\/95"}],"replies":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6536"}],"version-history":[{"count":0,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/6536\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/media\/12629"}],"wp:attachment":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6536"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6536"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6536"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}