{"id":2503,"date":"2026-09-02T01:23:41","date_gmt":"2026-09-01T18:23:41","guid":{"rendered":"https:\/\/yourapx.com\/?p=2503"},"modified":"2026-09-02T01:23:41","modified_gmt":"2026-09-01T18:23:41","slug":"dien-tro-nhiet-ntc-ptc-2","status":"publish","type":"post","link":"https:\/\/yourapx.com\/?p=2503","title":{"rendered":"\u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC l\u00e0 g\u00ec? K\u00fd hi\u1ec7u, c\u00e1ch m\u1eafc, c\u00e1ch \u0111o v\u00e0 \u1ee9ng d\u1ee5ng"},"content":{"rendered":"

1. \u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC l\u00e0 g\u00ec v\u00e0 c\u00f3 vai tr\u00f2 g\u00ec?<\/h2>\n

\u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC thay \u0111\u1ed5i \u0111i\u1ec7n tr\u1edf theo nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c \u00e1nh s\u00e1ng t\u00f9y \u0111\u00fang ch\u1ee7ng lo\u1ea1i. \u0110\u00e2y kh\u00f4ng ph\u1ea3i \u0111i\u1ec7n tr\u1edf c\u1ed1 \u0111\u1ecbnh, v\u00ec v\u1eady \u0111\u1eb7c tuy\u1ebfn ph\u1ea3i l\u1ea5y t\u1eeb datasheet.<\/p>\n

Ph\u1ea7n quan tr\u1ecdng nh\u1ea5t l\u00e0 x\u00e1c \u0111\u1ecbnh linh ki\u1ec7n n\u00e0y \u0111ang l\u00e0m nhi\u1ec7m v\u1ee5 g\u00ec trong kh\u1ed1i m\u1ea1ch tr\u01b0\u1edbc khi \u0111o ho\u1eb7c ch\u1ecdn linh ki\u1ec7n thay th\u1ebf.<\/p>\n

2. K\u00fd hi\u1ec7u \u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC trong s\u01a1 \u0111\u1ed3 m\u1ea1ch \u0111i\u1ec7n<\/h2>\n

K\u00fd hi\u1ec7u g\u1ed3m \u0111i\u1ec7n tr\u1edf k\u00e8m d\u1ea5u ch\u1ec9 \u0111\u1ea1i l\u01b0\u1ee3ng t\u00e1c \u0111\u1ed9ng. NTC\/PTC th\u01b0\u1eddng kh\u00f4ng ph\u00e2n c\u1ef1c; c\u1ea7n ph\u00e2n bi\u1ec7t v\u1edbi varistor v\u00e0 \u0111i\u1ec7n tr\u1edf c\u1ed1 \u0111\u1ecbnh.<\/p>\n

Tr\u00ean s\u01a1 \u0111\u1ed3, \u0111i\u1ec7n tr\u1edf th\u01b0\u1eddng mang m\u00e3 R; khi c\u00f3 nhi\u1ec1u \u0111i\u1ec7n tr\u1edf, ch\u00fang \u0111\u01b0\u1ee3c \u0111\u00e1nh s\u1ed1 R1, R2, R3\u2026<\/p>\n

\"K\u00fd
K\u00fd hi\u1ec7u v\u00e0 quy \u01b0\u1edbc ch\u00e2n c\u1ee7a \u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC trong s\u01a1 \u0111\u1ed3 m\u1ea1ch \u0111i\u1ec7n<\/figcaption><\/figure>\n

3. C\u1ea5u t\u1ea1o, h\u00ecnh d\u1ea1ng v\u00e0 ki\u1ec3u \u0111\u00f3ng g\u00f3i<\/h2>\n

V\u1eadt li\u1ec7u nh\u1ea1y nhi\u1ec7t ho\u1eb7c quang t\u1ea1o ra quan h\u1ec7 phi tuy\u1ebfn gi\u1eefa \u0111i\u1ec7n tr\u1edf v\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng c\u1ea7n \u0111o.<\/p>\n

Nh\u1eefng ki\u1ec3u v\u1ecf v\u00e0 ki\u1ec3u l\u1eafp th\u01b0\u1eddng g\u1eb7p g\u1ed3m:<\/p>\n

    \n
  • D\u1ea1ng h\u1ea1t ho\u1eb7c \u0111\u0129a xuy\u00ean l\u1ed7<\/li>\n
  • D\u1ea1ng \u0111\u1ea7u d\u00f2 b\u1ecdc kim lo\u1ea1i<\/li>\n
  • D\u1ea1ng SMD<\/li>\n
  • D\u1ea1ng c\u1ea3m bi\u1ebfn quang<\/li>\n<\/ul>\n
    \"\u0110i\u1ec7n
    \u1ea2nh th\u1ef1c t\u1ebf 1 c\u1ee7a \u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC d\u00f9ng \u0111\u1ec3 nh\u1eadn bi\u1ebft h\u00ecnh d\u1ea1ng t\u1ed5ng th\u1ec3.<\/figcaption><\/figure>\n

    4. C\u00e1c ch\u1ee7ng lo\u1ea1i ph\u1ed5 bi\u1ebfn<\/h2>\n

    M\u1ed7i ch\u1ee7ng lo\u1ea1i c\u00f3 \u01b0u \u0111i\u1ec3m, gi\u1edbi h\u1ea1n v\u00e0 m\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng kh\u00e1c nhau; kh\u00f4ng n\u00ean thay l\u1eabn ch\u1ec9 v\u00ec c\u00f3 h\u00ecnh d\u1ea1ng g\u1ea7n gi\u1ed1ng.<\/p>\n

      \n
    • NTC<\/li>\n
    • PTC<\/li>\n
    • LDR\/quang tr\u1edf<\/li>\n
    • C\u1ea3m bi\u1ebfn ch\u00ednh x\u00e1c theo b\u1ea3ng \u0111\u1eb7c tuy\u1ebfn<\/li>\n<\/ul>\n
      \"\u0110i\u1ec7n
      \u1ea2nh th\u1ef1c t\u1ebf 2 c\u1ee7a \u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC d\u00f9ng \u0111\u1ec3 quan s\u00e1t chi ti\u1ebft tr\u00ean linh ki\u1ec7n ho\u1eb7c bo m\u1ea1ch.<\/figcaption><\/figure>\n

      5. C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ea7n hi\u1ec3u<\/h2>\n
        \n
      • \u0110i\u1ec7n tr\u1edf t\u1ea1i \u0111i\u1ec1u ki\u1ec7n tham chi\u1ebfu:<\/strong> c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u1ecdc c\u00f9ng \u0111\u01a1n v\u1ecb, \u0111i\u1ec1u ki\u1ec7n \u0111o v\u00e0 gi\u1edbi h\u1ea1n do nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f4ng b\u1ed1.<\/li>\n
      • H\u1ec7 s\u1ed1 \u0111\u1eb7c tuy\u1ebfn:<\/strong> c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u1ecdc c\u00f9ng \u0111\u01a1n v\u1ecb, \u0111i\u1ec1u ki\u1ec7n \u0111o v\u00e0 gi\u1edbi h\u1ea1n do nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f4ng b\u1ed1.<\/li>\n
      • D\u1ea3i nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c quang ph\u1ed5:<\/strong> cho bi\u1ebft ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 cho ph\u00e9p v\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ebfn \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh, tu\u1ed5i th\u1ecd.<\/li>\n
      • C\u00f4ng su\u1ea5t t\u1ef1 nung:<\/strong> x\u00e1c \u0111\u1ecbnh l\u01b0\u1ee3ng nhi\u1ec7t linh ki\u1ec7n c\u00f3 th\u1ec3 ch\u1ecbu trong \u0111i\u1ec1u ki\u1ec7n quy \u0111\u1ecbnh m\u00e0 kh\u00f4ng b\u1ecb qu\u00e1 nhi\u1ec7t.<\/li>\n
      • Th\u1eddi gian \u0111\u00e1p \u1ee9ng:<\/strong> c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u1ecdc c\u00f9ng \u0111\u01a1n v\u1ecb, \u0111i\u1ec1u ki\u1ec7n \u0111o v\u00e0 gi\u1edbi h\u1ea1n do nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f4ng b\u1ed1.<\/li>\n<\/ul>\n
        \"H\u00ecnh
        H\u00ecnh k\u1ef9 thu\u1eadt tham kh\u1ea3o 1: H\u00ecnh minh h\u1ecda c\u1ea5u t\u1ea1o, nguy\u00ean l\u00fd ho\u1eb7c \u0111\u1eb7c t\u00ednh c\u1ee7a \u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC. Ngu\u1ed3n: Automotive Computer Controlled Systems Diagnostic Tools And Techniques, trang 138.<\/figcaption><\/figure>\n
        \"\u0110i\u1ec7n
        \u1ea2nh th\u1ef1c t\u1ebf 3 c\u1ee7a \u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC d\u00f9ng \u0111\u1ec3 quan s\u00e1t chi ti\u1ebft tr\u00ean linh ki\u1ec7n ho\u1eb7c bo m\u1ea1ch.<\/figcaption><\/figure>\n

        6. C\u00f4ng th\u1ee9c to\u00e1n h\u1ecdc v\u00e0 v\u1eadt l\u00fd<\/h2>\n

        C\u00e1c c\u00f4ng th\u1ee9c d\u01b0\u1edbi \u0111\u00e2y m\u00f4 t\u1ea3 quan h\u1ec7 gi\u1eefa nh\u1eefng \u0111\u1ea1i l\u01b0\u1ee3ng quan tr\u1ecdng c\u1ee7a linh ki\u1ec7n. U l\u00e0 \u0111i\u1ec7n \u00e1p, I l\u00e0 d\u00f2ng \u0111i\u1ec7n, R l\u00e0 \u0111i\u1ec7n tr\u1edf, P l\u00e0 c\u00f4ng su\u1ea5t, E ho\u1eb7c W l\u00e0 n\u0103ng l\u01b0\u1ee3ng, f l\u00e0 t\u1ea7n s\u1ed1 v\u00e0 t l\u00e0 th\u1eddi gian; \u0111\u01a1n v\u1ecb l\u1ea7n l\u01b0\u1ee3t l\u00e0 V, A, \u03a9, W, J, Hz v\u00e0 s.<\/p>\n

        \n
        M\u1ea1ch chia \u00e1p<\/figcaption>
        Ura<\/sub> = Uv\u00e0o<\/sub> \u00d7 R\u2082\/(R\u2081+R\u2082)<\/div>\n<\/figure>\n
        NTC g\u1ea7n \u0111\u00fang<\/figcaption>
        1<\/span>T<\/span><\/span> = 1<\/span>T<\/span><\/span>\u2080 + lnR\/R\u2080<\/span>B<\/span><\/span><\/div>\n<\/figure>\n
        C\u00f4ng th\u1ee9c 3<\/figcaption>
        P = U \u00d7 I; t\u1ef1 nung c\u00f3 th\u1ec3 l\u00e0m sai ph\u00e9p \u0111o<\/div>\n<\/figure>\n<\/div>\n

        K\u00fd hi\u1ec7u c\u00f3 ch\u1ec9 s\u1ed1 d\u01b0\u1edbi d\u00f9ng \u0111\u1ec3 ch\u1ec9 \u0111\u00fang v\u1ecb tr\u00ed ho\u1eb7c tr\u1ea1ng th\u00e1i \u0111o, ch\u1eb3ng h\u1ea1n Ura<\/sub> l\u00e0 \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra v\u00e0 Ushunt<\/sub> l\u00e0 \u0111i\u1ec7n \u00e1p tr\u00ean \u0111i\u1ec7n tr\u1edf shunt. V\u1edbi k\u00fd hi\u1ec7u ri\u00eang c\u1ee7a t\u1eebng h\u1ecd linh ki\u1ec7n, c\u1ea7n \u0111\u1ecdc \u0111\u1ecbnh ngh\u0129a ngay trong datasheet.<\/p>\n

        C\u00f4ng th\u1ee9c l\u00fd t\u01b0\u1edfng ch\u1ec9 \u0111\u00fang trong \u0111i\u1ec1u ki\u1ec7n \u0111\u00e3 n\u00eau. Khi ch\u1ecdn linh ki\u1ec7n th\u1eadt ph\u1ea3i t\u00ednh th\u00eam dung sai, nhi\u1ec7t \u0111\u1ed9, t\u1ea7n s\u1ed1, t\u1ea3i v\u00e0 gi\u1edbi h\u1ea1n trong datasheet.<\/p>\n

        \"\u0110i\u1ec7n
        \u1ea2nh th\u1ef1c t\u1ebf 4 c\u1ee7a \u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC d\u00f9ng \u0111\u1ec3 quan s\u00e1t chi ti\u1ebft tr\u00ean linh ki\u1ec7n ho\u1eb7c bo m\u1ea1ch.<\/figcaption><\/figure>\n

        7. C\u00e1c c\u00e1ch m\u1eafc \u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC trong m\u1ea1ch \u0111i\u1ec7n t\u1eed<\/h2>\n

        C\u00e1c c\u00e1ch m\u1eafc \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp t\u1eeb d\u1ec5 nh\u1eadn bi\u1ebft \u0111\u1ebfn \u1ee9ng d\u1ee5ng n\u00e2ng cao. \u1ede m\u1ed7i s\u01a1 \u0111\u1ed3, h\u00e3y theo d\u00f5i \u0111i\u1ec3m n\u1ed1i ngu\u1ed3n, mass, \u0111\u1ea7u v\u00e0o, \u0111\u1ea7u ra v\u00e0 chi\u1ec1u d\u00f2ng \u0111i\u1ec7n tr\u01b0\u1edbc khi t\u00ednh to\u00e1n.<\/p>\n

        \n
        \n

        C\u00e1c c\u00e1ch m\u1eafc th\u01b0\u1eddng d\u00f9ng<\/h3>\n

        1. M\u1eafc chia \u00e1p<\/h4>\n

        Nguy\u00ean l\u00fd:<\/strong> C\u1ea3m bi\u1ebfn v\u00e0 \u0111i\u1ec7n tr\u1edf chu\u1ea9n t\u1ea1o \u0111i\u1ec7n \u00e1p ph\u1ee5 thu\u1ed9c \u0111\u1ea1i l\u01b0\u1ee3ng \u0111o; v\u1ecb tr\u00ed tr\u00ean\/d\u01b0\u1edbi quy\u1ebft \u0111\u1ecbnh chi\u1ec1u bi\u1ebfn thi\u00ean \u0111i\u1ec7n \u00e1p.<\/p>\n

        \"S\u01a1
        S\u01a1 \u0111\u1ed3 c\u00e1ch m\u1eafc 1: M\u1eafc chia \u00e1p \u2013 C\u1ea3m bi\u1ebfn v\u00e0 \u0111i\u1ec7n tr\u1edf chu\u1ea9n t\u1ea1o \u0111i\u1ec7n \u00e1p ph\u1ee5 thu\u1ed9c \u0111\u1ea1i l\u01b0\u1ee3ng \u0111o; v\u1ecb tr\u00ed tr\u00ean\/d\u01b0\u1edbi quy\u1ebft \u0111\u1ecbnh chi\u1ec1u bi\u1ebfn thi\u00ean \u0111i\u1ec7n \u00e1p.<\/figcaption><\/figure>\n

        2. M\u1eafc c\u1ea7u \u0111o<\/h4>\n

        Nguy\u00ean l\u00fd:<\/strong> D\u00f9ng c\u1ea7u Wheatstone khi c\u1ea7n t\u0103ng \u0111\u1ed9 nh\u1ea1y v\u00e0 \u0111o bi\u1ebfn thi\u00ean nh\u1ecf.<\/p>\n

        \"S\u01a1
        S\u01a1 \u0111\u1ed3 c\u00e1ch m\u1eafc 2: M\u1eafc c\u1ea7u \u0111o \u2013 D\u00f9ng c\u1ea7u Wheatstone khi c\u1ea7n t\u0103ng \u0111\u1ed9 nh\u1ea1y v\u00e0 \u0111o bi\u1ebfn thi\u00ean nh\u1ecf.<\/figcaption><\/figure>\n

        3. M\u1eafc h\u1ea1n d\u00f2ng kh\u1edfi \u0111\u1ed9ng<\/h4>\n

        Nguy\u00ean l\u00fd:<\/strong> NTC c\u00f4ng su\u1ea5t m\u1eafc n\u1ed1i ti\u1ebfp \u0111\u1ea7u v\u00e0o \u0111\u1ec3 h\u1ea1n d\u00f2ng n\u1ea1p t\u1ee5; ph\u1ea3i ch\u1ecdn \u0111\u00fang d\u00f2ng v\u00e0 n\u0103ng l\u01b0\u1ee3ng.<\/p>\n

        4. M\u1eafc b\u1ea3o v\u1ec7 t\u1ef1 ph\u1ee5c h\u1ed3i<\/h4>\n

        Nguy\u00ean l\u00fd:<\/strong> PTC m\u1eafc n\u1ed1i ti\u1ebfp t\u1ea3i ho\u1eb7c trong m\u1ea1ch b\u1ea3o v\u1ec7 nhi\u1ec7t; tr\u1ea1ng th\u00e1i ph\u1ee5 thu\u1ed9c \u0111\u00fang lo\u1ea1i PTC.<\/p>\n<\/section>\n<\/div>\n

        8. V\u00ed d\u1ee5 t\u00ednh to\u00e1n v\u00e0 \u1ee9ng d\u1ee5ng<\/h2>\n

        NTC 10 k\u03a9 t\u1ea1i 25 \u00b0C m\u1eafc v\u1edbi \u0111i\u1ec7n tr\u1edf 10 k\u03a9 t\u1ea1o c\u1ea7u chia \u00e1p 5 V s\u1ebd cho kho\u1ea3ng 2,5 V t\u1ea1i 25 \u00b0C; \u0111i\u1ec7n \u00e1p thay \u0111\u1ed5i theo v\u1ecb tr\u00ed NTC v\u00e0 \u0111\u1eb7c tuy\u1ebfn th\u1ef1c t\u1ebf.<\/p>\n

        \"H\u00ecnh
        H\u00ecnh k\u1ef9 thu\u1eadt tham kh\u1ea3o 2: H\u00ecnh k\u1ef9 thu\u1eadt tham kh\u1ea3o v\u1ec1 \u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC. Ngu\u1ed3n: Radio Frequency Transistors, trang 87.<\/figcaption><\/figure>\n
        \"\u0110i\u1ec7n
        \u1ea2nh th\u1ef1c t\u1ebf 5 c\u1ee7a \u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC d\u00f9ng \u0111\u1ec3 quan s\u00e1t chi ti\u1ebft tr\u00ean linh ki\u1ec7n ho\u1eb7c bo m\u1ea1ch.<\/figcaption><\/figure>\n

        9. C\u00e1ch \u0111\u1ecdc m\u00e3 v\u00e0 datasheet<\/h2>\n

        \u0110\u1ecdc tr\u1ecb s\u1ed1 tham chi\u1ebfu, dung sai, h\u1ec7 s\u1ed1 B ho\u1eb7c \u0111\u1eb7c tuy\u1ebfn R\u2013T\/R\u2013lux, h\u1eb1ng s\u1ed1 nhi\u1ec7t, th\u1eddi gian \u0111\u00e1p \u1ee9ng v\u00e0 c\u00f4ng su\u1ea5t t\u1ed1i \u0111a.<\/p>\n

        H\u00e3y ph\u00e2n bi\u1ec7t th\u00f4ng s\u1ed1 l\u00e0m vi\u1ec7c khuy\u1ebfn ngh\u1ecb v\u1edbi gi\u1edbi h\u1ea1n tuy\u1ec7t \u0111\u1ed1i. Gi\u1edbi h\u1ea1n tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ee9c n\u00ean duy tr\u00ec trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh.<\/p>\n

        \"\u0110i\u1ec7n
        \u1ea2nh th\u1ef1c t\u1ebf 6 c\u1ee7a \u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC d\u00f9ng \u0111\u1ec3 quan s\u00e1t chi ti\u1ebft tr\u00ean linh ki\u1ec7n ho\u1eb7c bo m\u1ea1ch.<\/figcaption><\/figure>\n

        10. C\u00e1ch \u0111o v\u00e0 ki\u1ec3m tra tr\u00ean bo m\u1ea1ch<\/h2>\n
          \n
        1. \u0110o \u0111i\u1ec7n tr\u1edf t\u1ea1i nhi\u1ec7t \u0111\u1ed9\/\u00e1nh s\u00e1ng \u0111\u00e3 bi\u1ebft<\/li>\n
        2. T\u00e1c \u0111\u1ed9ng nhi\u1ec7t ho\u1eb7c \u00e1nh s\u00e1ng t\u1eeb t\u1eeb v\u00e0 quan s\u00e1t chi\u1ec1u thay \u0111\u1ed5i<\/li>\n
        3. Tr\u00e1nh d\u00f2ng \u0111o l\u1edbn g\u00e2y t\u1ef1 nung<\/li>\n<\/ol>\n

          Khi \u0111o tr\u1ef1c ti\u1ebfp tr\u00ean bo, c\u00e1c linh ki\u1ec7n n\u1ed1i v\u1edbi c\u00f9ng n\u00fat m\u1ea1ch c\u00f3 th\u1ec3 l\u00e0m k\u1ebft qu\u1ea3 kh\u00e1c tr\u1ecb s\u1ed1 ri\u00eang c\u1ee7a linh ki\u1ec7n. N\u1ebfu c\u1ea7n \u0111o \u0111\u1ed9c l\u1eadp, ch\u1ec9 th\u00e1o m\u1ed9t \u0111\u1ea7u ho\u1eb7c ch\u00e2n \u0111o ph\u00f9 h\u1ee3p sau khi \u0111\u00e3 ng\u1eaft ngu\u1ed3n v\u00e0 x\u1ea3 h\u1ebft \u0111i\u1ec7n t\u00edch.<\/p>\n

          11. D\u1ea1ng h\u01b0 h\u1ecfng v\u00e0 nguy\u00ean nh\u00e2n<\/h2>\n

          D\u1ea5u hi\u1ec7u c\u00f3 th\u1ec3 quan s\u00e1t ho\u1eb7c \u0111o \u0111\u01b0\u1ee3c<\/h3>\n
            \n
          • \u0110\u1ee9t ho\u1eb7c ch\u1eadp<\/li>\n
          • Tr\u00f4i \u0111\u1eb7c tuy\u1ebfn<\/li>\n
          • Ph\u1ea3n h\u1ed3i ch\u1eadm<\/li>\n
          • N\u1ee9t l\u1edbp b\u1ecdc ho\u1eb7c h\u00fat \u1ea9m<\/li>\n<\/ul>\n

            Nh\u1eefng nguy\u00ean nh\u00e2n c\u1ea7n ki\u1ec3m tra<\/h3>\n
              \n
            • Qu\u00e1 nhi\u1ec7t<\/li>\n
            • C\u00f4ng su\u1ea5t t\u1ef1 nung qu\u00e1 l\u1edbn<\/li>\n
            • L\u00e3o h\u00f3a<\/li>\n
            • \u1ea8m ho\u1eb7c \u1ee9ng su\u1ea5t c\u01a1 kh\u00ed<\/li>\n<\/ul>\n

              M\u1ed9t d\u1ea5u hi\u1ec7u c\u00f3 th\u1ec3 xu\u1ea5t ph\u00e1t t\u1eeb nhi\u1ec1u nguy\u00ean nh\u00e2n. Ch\u1ec9 k\u1ebft lu\u1eadn linh ki\u1ec7n h\u1ecfng sau khi k\u1ebft h\u1ee3p k\u1ebft qu\u1ea3 \u0111o, s\u01a1 \u0111\u1ed3 m\u1ea1ch v\u00e0 \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh.<\/p>\n

              12. C\u00e1ch l\u1ef1a ch\u1ecdn linh ki\u1ec7n thay th\u1ebf<\/h2>\n
                \n
              • \u0110\u00fang lo\u1ea1i NTC\/PTC\/LDR<\/li>\n
              • \u0110\u00fang tr\u1ecb s\u1ed1 tham chi\u1ebfu v\u00e0 \u0111\u01b0\u1eddng \u0111\u1eb7c tuy\u1ebfn<\/li>\n
              • D\u1ea3i nhi\u1ec7t \u0111\u1ed9, c\u00f4ng su\u1ea5t v\u00e0 th\u1eddi gian \u0111\u00e1p \u1ee9ng ph\u00f9 h\u1ee3p<\/li>\n
              • \u0110\u00fang package v\u00e0 c\u00e1ch ti\u1ebfp x\u00fac nhi\u1ec7t<\/li>\n<\/ul>\n

                13. C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n

                C\u00f3 th\u1ec3 \u0111o \u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC tr\u1ef1c ti\u1ebfp tr\u00ean bo m\u1ea1ch kh\u00f4ng?<\/h3>\n

                C\u00f3 th\u1ec3 ki\u1ec3m tra s\u01a1 b\u1ed9 sau khi \u0111\u00e3 ng\u1eaft ngu\u1ed3n v\u00e0 x\u1ea3 \u0111i\u1ec7n t\u00edch. Tuy nhi\u00ean, nh\u1eefng nh\u00e1nh m\u1ea1ch n\u1ed1i song song ho\u1eb7c linh ki\u1ec7n b\u1ea3o v\u1ec7 c\u00f3 th\u1ec3 l\u00e0m sai k\u1ebft qu\u1ea3; khi c\u1ea7n \u0111o \u0111\u1ed9c l\u1eadp ph\u1ea3i t\u00e1ch ch\u00e2n ph\u00f9 h\u1ee3p v\u00e0 \u0111\u1ed1i chi\u1ebfu s\u01a1 \u0111\u1ed3.<\/p>\n

                C\u00f3 th\u1ec3 d\u00f9ng linh ki\u1ec7n c\u00f3 th\u00f4ng s\u1ed1 cao h\u01a1n \u0111\u1ec3 thay th\u1ebf kh\u00f4ng?<\/h3>\n

                Tr\u01b0\u1edbc h\u1ebft, linh ki\u1ec7n thay th\u1ebf ph\u1ea3i \u0111\u00fang ch\u1ee9c n\u0103ng v\u00e0 tr\u1ecb s\u1ed1 ch\u00ednh. M\u1ed9t s\u1ed1 gi\u1edbi h\u1ea1n nh\u01b0 c\u00f4ng su\u1ea5t ho\u1eb7c \u0111i\u1ec7n \u00e1p c\u00f3 th\u1ec3 ch\u1ecdn cao h\u01a1n, nh\u01b0ng k\u00edch th\u01b0\u1edbc, \u0111\u1eb7c t\u00ednh xung, t\u1ea7n s\u1ed1 v\u00e0 nhi\u1ec7t v\u1eabn ph\u1ea3i ph\u00f9 h\u1ee3p. V\u1edbi linh ki\u1ec7n nhi\u1ec1u ch\u00e2n, s\u01a1 \u0111\u1ed3 ch\u00e2n b\u1eaft bu\u1ed9c ph\u1ea3i t\u01b0\u01a1ng th\u00edch.<\/p>\n

                \n

                T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n

                C\u00e1c t\u00e0i li\u1ec7u d\u01b0\u1edbi \u0111\u00e2y \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u0111\u1ed1i chi\u1ebfu k\u00fd hi\u1ec7u, nguy\u00ean l\u00fd, th\u00f4ng s\u1ed1 v\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111o ki\u1ec3m c\u1ee7a linh ki\u1ec7n.<\/p>\n

                  \n
                1. [1] Newnes Industrial Control Wiring Guide<\/strong> \u2014 trang 18.<\/li>\n
                2. [2] Real Analog Solutions for Digital Designers<\/strong> \u2014 trang 19.<\/li>\n
                3. [3] Electronics for Dummies John Wiley and Sons eBook-LinG<\/strong> \u2014 trang 411, trang 424.<\/li>\n
                4. [4] ON_Analog_Integrated_Circuits<\/strong> \u2014 trang 1199, trang 3065.<\/li>\n
                5. [5] Basic Theory and Application of Transistors<\/strong> \u2014 trang 91.<\/li>\n<\/ol>\n<\/section>\n

                  14. K\u1ebft lu\u1eadn<\/h2>\n

                  Mu\u1ed1n s\u1eed d\u1ee5ng linh ki\u1ec7n n\u00e0y \u0111\u00fang c\u00e1ch, ng\u01b0\u1eddi \u0111\u1ecdc c\u1ea7n nh\u1eadn d\u1ea1ng \u0111\u00fang lo\u1ea1i, hi\u1ec3u k\u00fd hi\u1ec7u v\u00e0 \u0111\u01b0\u1eddng k\u1ebft n\u1ed1i, t\u00ednh \u0111\u01b0\u1ee3c \u0111i\u1ec1u ki\u1ec7n l\u00e0m vi\u1ec7c, \u0111o ki\u1ec3m an to\u00e0n v\u00e0 \u0111\u1ed1i chi\u1ebfu datasheet tr\u01b0\u1edbc khi thay th\u1ebf.<\/p>\n","protected":false},"excerpt":{"rendered":"

                  T\u00ecm hi\u1ec3u \u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC: k\u00fd hi\u1ec7u, ki\u1ec3u \u0111\u00f3ng g\u00f3i, c\u00f4ng th\u1ee9c, c\u00e1ch m\u1eafc trong m\u1ea1ch, ph\u01b0\u01a1ng ph\u00e1p \u0111o, l\u1ed7i th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e1ch ch\u1ecdn linh ki\u1ec7n thay th\u1ebf.<\/p>\n","protected":false},"author":1,"featured_media":1794,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[],"class_list":["post-2503","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dien-tu"],"yoast_head":"\n\u0110i\u1ec7n tr\u1edf nhi\u1ec7t NTC PTC l\u00e0 g\u00ec? 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