{"id":14864,"date":"2026-06-02T15:10:32","date_gmt":"2026-06-02T07:10:32","guid":{"rendered":"https:\/\/www.goodworksemi.com\/?p=14864"},"modified":"2026-06-02T15:10:32","modified_gmt":"2026-06-02T07:10:32","slug":"the-key-to-whether-a-usb-fan-works-well-actually-lies-in-these-three-small-components","status":"publish","type":"post","link":"https:\/\/www.goodworksemi.com\/vi\/the-key-to-whether-a-usb-fan-works-well-actually-lies-in-these-three-small-components\/","title":{"rendered":"Ch\u00eca kh\u00f3a quy\u1ebft \u0111\u1ecbnh qu\u1ea1t USB c\u00f3 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t hay kh\u00f4ng th\u1ef1c ra n\u1eb1m \u1edf ba b\u1ed9 ph\u1eadn nh\u1ecf n\u00e0y!"},"content":{"rendered":"

Ngay khi m\u00f9a h\u00e8 \u0111\u1ebfn, nh\u1eefng chi\u1ebfc qu\u1ea1t mini USB tr\u1edf th\u00e0nh \u201cc\u1ee9u tinh\u201d trong v\u0103n ph\u00f2ng, ph\u00f2ng k\u00fd t\u00fac x\u00e1 v\u00e0 c\u00e1c chuy\u1ebfn d\u00e3 ngo\u1ea1i ngo\u00e0i tr\u1eddi. Nh\u1eb9, d\u1ec5 mang theo, c\u1eafm l\u00e0 ch\u1ea1y v\u00e0 c\u00f3 th\u1eddi l\u01b0\u1ee3ng pin \u0111\u1ee7 d\u00f9ng, ch\u00fang tr\u00f4ng c\u00f3 v\u1ebb \u0111\u01a1n gi\u1ea3n v\u1ec1 thi\u1ebft k\u1ebf. Tuy nhi\u00ean, nhi\u1ec1u ng\u01b0\u1eddi l\u1ea1i b\u1ecf qua m\u1ed9t th\u1ef1c t\u1ebf quan tr\u1ecdng: vi\u1ec7c chi\u1ebfc qu\u1ea1t c\u00f3 ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh, ch\u1ea1y \u00eam \u00e1i, c\u00f3 b\u1ecb qu\u00e1 nhi\u1ec7t hay c\u00f3 tu\u1ed5i th\u1ecd cao hay kh\u00f4ng v\u1ec1 c\u01a1 b\u1ea3n ph\u1ee5 thu\u1ed9c v\u00e0o hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c linh ki\u1ec7n ri\u00eang l\u1ebb trong m\u1ea1ch \u0111i\u1ec7n b\u00ean trong.<\/p>\n

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Nhi\u1ec1u lo\u1ea1i qu\u1ea1t gi\u00e1 r\u1ebb th\u01b0\u1eddng g\u1eb7p ph\u1ea3i c\u00e1c v\u1ea5n \u0111\u1ec1 sau m\u1ed9t th\u1eddi gian s\u1eed d\u1ee5ng, ch\u1eb3ng h\u1ea1n nh\u01b0 l\u01b0u l\u01b0\u1ee3ng gi\u00f3 gi\u1ea3m, qu\u00e1 nhi\u1ec7t, ph\u00e1t ra ti\u1ebfng \u1ed3n v\u00e0 rung \u0111\u1ed9ng b\u1ea5t th\u01b0\u1eddng, c\u0169ng nh\u01b0 tu\u1ed5i th\u1ecd b\u1ecb r\u00fat ng\u1eafn. Nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 th\u01b0\u1eddng l\u00e0 do m\u1ee9c \u0111\u1ed9 hao m\u00f2n cao c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn, hi\u1ec7u su\u1ea5t th\u1ea5p v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh kh\u00f4ng \u0111\u1ea3m b\u1ea3o.<\/p>\n

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V\u1edbi t\u01b0 c\u00e1ch l\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t linh ki\u1ec7n r\u1eddi trong n\u01b0\u1edbc c\u00f3 h\u01a1n 20 n\u0103m kinh nghi\u1ec7m trong ng\u00e0nh, c\u00e1c s\u1ea3n ph\u1ea9m \u0111i-\u1ed1t, b\u00f3ng b\u00e1n d\u1eabn v\u00e0 chip qu\u1ea3n l\u00fd pin lithium c\u1ee7a GK \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong qu\u1ea1t USB, c\u00e1c thi\u1ebft b\u1ecb gia d\u1ee5ng nh\u1ecf v\u00e0 b\u1ed9 ngu\u1ed3n \u0111i\u1ec7n \u00e1p th\u1ea5p. Nh\u1edd t\u00ednh nh\u1ea5t qu\u00e1n cao, \u0111\u1ed9 tin c\u1eady v\u00e0 \u0111\u1eb7c t\u00ednh t\u1ed5n hao th\u1ea5p, c\u00e1c s\u1ea3n ph\u1ea9m n\u00e0y gi\u00fap n\u00e2ng cao tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng v\u00e0 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a s\u1ea3n ph\u1ea9m cu\u1ed1i ngay t\u1eeb kh\u00e2u s\u1ea3n xu\u1ea5t ban \u0111\u1ea7u.<\/p>\n

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PH\u1ea6N 1: \u0110i\u1ed1t Schottky SS34: Ngu\u1ed3n \u0111i\u1ec7n t\u1ed5n hao th\u1ea5p gi\u00fap qu\u1ea1t ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh h\u01a1n<\/p>\n

Qu\u1ea1t USB th\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng v\u1edbi ngu\u1ed3n \u0111i\u1ec7n \u00e1p th\u1ea5p 5V, do \u0111\u00f3 \u0111\u1eb7t ra nh\u1eefng y\u00eau c\u1ea7u nghi\u00eam ng\u1eb7t v\u1ec1 m\u1ee9c ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng v\u00e0 m\u1ee9c t\u0103ng nhi\u1ec7t \u0111\u1ed9. N\u1ebfu s\u1ee5t \u00e1p qua thi\u1ebft b\u1ecb ch\u1ec9nh l\u01b0u qu\u00e1 cao, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn l\u01b0u l\u01b0\u1ee3ng gi\u00f3 gi\u1ea3m, th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng ng\u1eafn h\u01a1n ho\u1eb7c th\u1eadm ch\u00ed l\u00e0 qu\u00e1 nhi\u1ec7t. Diode Schottky Good-Walk SS34 (3A\/40V), v\u1edbi v\u1ecf b\u1ecdc g\u1eafn b\u1ec1 m\u1eb7t, l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb ch\u1ec9nh l\u01b0u v\u00e0 b\u1ea3o v\u1ec7 hi\u1ec7u su\u1ea5t cao ph\u1ed5 bi\u1ebfn trong c\u00e1c thi\u1ebft b\u1ecb nh\u1ecf USB.<\/p>\n

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Nh\u1eefng \u01b0u \u0111i\u1ec3m ch\u00ednh:<\/p>\n

\u2705 \u0110i\u1ec7n \u00e1p s\u1ee5t gi\u1ea3m thu\u1eadn th\u1ea5p: Th\u00f4ng th\u01b0\u1eddng t\u1eeb 0,45\u20130,55 V, gi\u00fap gi\u1ea3m \u0111\u00e1ng k\u1ec3 t\u1ed5n th\u1ea5t d\u1eabn \u0111i\u1ec7n so v\u1edbi c\u00e1c \u0111i-\u1ed1t silicon ti\u00eau chu\u1ea9n v\u00e0 n\u00e2ng cao hi\u1ec7u su\u1ea5t n\u0103ng l\u01b0\u1ee3ng.<\/p>\n

\u2705 Gi\u1ea3m sinh nhi\u1ec7t: M\u1ea5t m\u00e1t c\u00f4ng su\u1ea5t th\u1ea5p gi\u00fap h\u1ea1n ch\u1ebf s\u1ef1 gia t\u0103ng nhi\u1ec7t \u0111\u1ed9, t\u1eeb \u0111\u00f3 gi\u1ea3m thi\u1ec3u s\u1ef1 suy gi\u1ea3m hi\u1ec7u su\u1ea5t khi ho\u1ea1t \u0111\u1ed9ng trong th\u1eddi gian d\u00e0i.<\/p>\n

\u2705 Kh\u00f4i ph\u1ee5c ng\u01b0\u1ee3c nhanh: Kh\u00f4ng c\u00f3 \u0111\u1ed9 tr\u1ec5 khi kh\u00f4i ph\u1ee5c ng\u01b0\u1ee3c, n\u00ean r\u1ea5t ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ec9nh l\u01b0u, gi\u1eef d\u00f2ng v\u00e0 b\u1ea3o v\u1ec7 ch\u1ed1ng n\u1ed1i ng\u01b0\u1ee3c.<\/p>\n

\u2705 V\u1ecf SMA\/SMB nh\u1ecf g\u1ecdn: Ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c thi\u1ebft k\u1ebf bo m\u1ea1ch in (PCB) m\u1ecfng v\u00e0 t\u01b0\u01a1ng th\u00edch v\u1edbi quy tr\u00ecnh s\u1ea3n xu\u1ea5t l\u1eafp r\u00e1p b\u1ec1 m\u1eb7t t\u1ef1 \u0111\u1ed9ng.<\/p>\n

Trong m\u1ea1ch qu\u1ea1t USB, SS34 ch\u1ee7 y\u1ebfu \u0111\u1ea3m nhi\u1ec7m ch\u1ee9c n\u0103ng ch\u1ec9nh l\u01b0u v\u00e0 b\u1ea3o v\u1ec7 ngu\u1ed3n, \u0111\u00f3ng vai tr\u00f2 l\u00e0 linh ki\u1ec7n n\u1ec1n t\u1ea3ng quan tr\u1ecdng gi\u00fap n\u00e2ng cao \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh.<\/p>\n

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PH\u1ea6N 2: MMBT3904 \u2013 B\u00f3ng b\u00e1n d\u1eabn NPN: M\u1ea1ch \u0111i\u1ec1u khi\u1ec3n g\u1eafn b\u1ec1 m\u1eb7t gi\u00fap qu\u1ea1t ho\u1ea1t \u0111\u1ed9ng \u00eam \u00e1i v\u00e0 kh\u00f4ng g\u00e2y ti\u1ebfng \u1ed3n<\/p>\n

Ch\u1ee9c n\u0103ng \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 qu\u1ea1t, kh\u1edfi \u0111\u1ed9ng\/d\u1eebng v\u00e0 kh\u1edfi \u0111\u1ed9ng m\u1ec1m ph\u1ee5 thu\u1ed9c v\u00e0o kh\u1ea3 n\u0103ng \u0111i\u1ec1u khi\u1ec3n v\u00e0 khu\u1ebfch \u0111\u1ea1i d\u00f2ng \u0111i\u1ec7n \u0111\u1ed9ng c\u01a1 c\u1ee7a b\u00f3ng b\u00e1n d\u1eabn. C\u00f4ng su\u1ea5t \u0111i\u1ec1u khi\u1ec3n kh\u00f4ng \u0111\u1ee7 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 kh\u00f4ng \u1ed5n \u0111\u1ecbnh, rung \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1 ho\u1eb7c th\u1eadm ch\u00ed l\u00e0 ti\u1ebfng \u1ed3n b\u1ea5t th\u01b0\u1eddng. B\u00f3ng b\u00e1n d\u1eabn NPN Good-Walker MMBT3904, \u0111\u01b0\u1ee3c \u0111\u00f3ng g\u00f3i trong v\u1ecf SOT-23 g\u1eafn b\u1ec1 m\u1eb7t, l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb \u0111i\u1ec1u khi\u1ec3n \u0111a n\u0103ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed nh\u1ecf.<\/p>\n

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Nh\u1eefng \u01b0u \u0111i\u1ec3m ch\u00ednh:<\/p>\n

\u2705 M\u1ea1ch \u0111i\u1ec1u khi\u1ec3n c\u00f4ng su\u1ea5t th\u1ea5p: \u0110i\u1ec7n \u00e1p b\u00e3o h\u00f2a th\u1ea5p gi\u00fap gi\u1ea3m thi\u1ec3u hi\u1ec7u qu\u1ea3 t\u1ed5n th\u1ea5t trong m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n khi \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n 5V.<\/p>\n

\u2705 Hi\u1ec7u su\u1ea5t ph\u1ea3n \u1ee9ng nhanh: Kh\u1ea3 n\u0103ng khu\u1ebfch \u0111\u1ea1i d\u00f2ng \u0111i\u1ec7n \u1ed5n \u0111\u1ecbnh cho ph\u00e9p \u0111i\u1ec1u khi\u1ec3n \u0111a t\u1ed1c \u0111\u1ed9 v\u00e0 kh\u1edfi \u0111\u1ed9ng \u00eam \u00e1i.<\/p>\n

\u2705 Ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh: Ki\u1ec3m so\u00e1t s\u1ef1 dao \u0111\u1ed9ng c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u0111\u1ed9ng c\u01a1, gi\u00fap gi\u1ea3m rung \u0111\u1ed9ng v\u00e0 ti\u1ebfng \u1ed3n t\u1ea7n s\u1ed1 th\u1ea5p.<\/p>\n

\u2705 V\u1ecf SOT-23 si\u00eau nh\u1ecf g\u1ecdn: Ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c b\u1ea3n v\u1ebd m\u1ea1ch in (PCB) m\u1eadt \u0111\u1ed9 cao v\u00e0 t\u01b0\u01a1ng th\u00edch v\u1edbi quy tr\u00ecnh l\u1eafp r\u00e1p SMT.<\/p>\n

D\u00f9 l\u00e0 \u0111\u1ed1i v\u1edbi qu\u1ea1t t\u1ed1c \u0111\u1ed9 c\u1ed1 \u0111\u1ecbnh c\u01a1 b\u1ea3n hay qu\u1ea1t \u0111a t\u1ed1c \u0111\u1ed9 c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh, MMBT3904 \u0111\u1ec1u \u0111\u1ea3m b\u1ea3o th\u1ef1c hi\u1ec7n nhi\u1ec7m v\u1ee5 \u0111i\u1ec1u khi\u1ec3n m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady.<\/p>\n

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PH\u1ea6N 3: IC qu\u1ea3n l\u00fd pin lithium 4056H: T\u0103ng c\u01b0\u1eddng an to\u00e0n v\u00e0 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd pin<\/p>\n

\u0110\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i qu\u1ea1t USB s\u1eed d\u1ee5ng pin lithium, vi\u1ec7c qu\u1ea3n l\u00fd qu\u00e1 tr\u00ecnh s\u1ea1c v\u00e0 x\u1ea3 pin l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng. GoodWalk 4056H l\u00e0 m\u1ed9t IC pin lithium m\u1ed9t cell t\u00edch h\u1ee3p ch\u1ee9c n\u0103ng qu\u1ea3n l\u00fd s\u1ea1c v\u00e0 b\u1ea3o v\u1ec7, \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c lo\u1ea1i qu\u1ea1t c\u1ea7m tay, tai nghe TWS v\u00e0 c\u00e1c thi\u1ebft b\u1ecb gia d\u1ee5ng nh\u1ecf.<\/p>\n

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Nh\u1eefng \u01b0u \u0111i\u1ec3m ch\u00ednh:<\/p>\n

\u2705 S\u1ea1c d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i ch\u00ednh x\u00e1c: B\u1ea3o v\u1ec7 pin v\u00e0 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a pin<\/p>\n

\u2705 B\u1ea3o v\u1ec7 ch\u1ed1ng s\u1ea1c qu\u00e1 m\u1ee9c\/x\u1ea3 qu\u00e1 m\u1ee9c\/qu\u00e1 d\u00f2ng: T\u0103ng c\u01b0\u1eddng \u0111\u1ed9 an to\u00e0n t\u1ed5ng th\u1ec3 cho thi\u1ebft b\u1ecb<\/p>\n

\u2705 Hi\u1ec7u su\u1ea5t cao v\u00e0 sinh nhi\u1ec7t th\u1ea5p: T\u1ed1i \u01b0u h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng n\u0103ng l\u01b0\u1ee3ng<\/p>\n

\u2705 Thi\u1ebft k\u1ebf g\u00f3i nh\u1ecf g\u1ecdn: Ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c thi\u1ebft b\u1ecb m\u1ecfng v\u00e0 thu\u1eadn ti\u1ec7n cho s\u1ea3n xu\u1ea5t SMT h\u00e0ng lo\u1ea1t<\/p>\n

Khi k\u1ebft h\u1ee3p v\u1edbi SS34 v\u00e0 MMBT3904, 4056H \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u1ed9 tin c\u1eady cao h\u01a1n trong ba l\u0129nh v\u1ef1c ch\u00ednh: ngu\u1ed3n \u0111i\u1ec7n \u00e1p th\u1ea5p, \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 v\u00e0 qu\u1ea3n l\u00fd pin.<\/p>\n

 <\/p>\n

C\u00e1c linh ki\u1ec7n \u0111\u00e1ng tin c\u1eady quy\u1ebft \u0111\u1ecbnh tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng l\u00e2u d\u00e0i c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb gia d\u1ee5ng nh\u1ecf<\/p>\n

T\u1eeb SS34 d\u00f9ng cho ch\u1ec9nh l\u01b0u v\u00e0 b\u1ea3o v\u1ec7, \u0111\u1ebfn MMBT3904 d\u00f9ng cho \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1, v\u00e0 4056H d\u00f9ng cho qu\u1ea3n l\u00fd pin, GoodWalk \u0111\u1ea3m b\u1ea3o c\u00e1c linh ki\u1ec7n c\u1ee7a m\u00ecnh \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n sau th\u00f4ng qua quy tr\u00ecnh \u0111\u00f3ng g\u00f3i ho\u00e0n thi\u1ec7n v\u00e0 h\u1ec7 th\u1ed1ng ki\u1ec3m tra nghi\u00eam ng\u1eb7t: \u0110\u1ed9 nh\u1ea5t qu\u00e1n cao v\u1ec1 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh tuy\u1ec7t v\u1eddi \u1edf nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 th\u1ea5p, \u0111\u1ed9 tin c\u1eady cao gi\u1eefa c\u00e1c l\u00f4 s\u1ea3n ph\u1ea9m, c\u00f9ng s\u1ef1 \u1ed5n \u0111\u1ecbnh trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t. C\u00e1c gi\u1ea3i ph\u00e1p linh ki\u1ec7n n\u00e0y kh\u00f4ng ch\u1ec9 ph\u00f9 h\u1ee3p v\u1edbi qu\u1ea1t USB m\u00e0 c\u00f2n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong \u0111\u00e8n b\u00e0n nh\u1ecf, pin s\u1ea1c d\u1ef1 ph\u00f2ng, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i v\u00e0 c\u00e1c thi\u1ebft b\u1ecb di \u0111\u1ed9ng \u0111i\u1ec7n \u00e1p th\u1ea5p kh\u00e1c nhau, cung c\u1ea5p n\u1ec1n t\u1ea3ng \u0111\u00e1ng tin c\u1eady cho c\u00e1c s\u1ea3n ph\u1ea9m cu\u1ed1i c\u00f9ng. K\u1ebft lu\u1eadn: Khi ng\u01b0\u1eddi ti\u00eau d\u00f9ng nh\u00ecn v\u00e0o m\u1ed9t chi\u1ebfc qu\u1ea1t, h\u1ecd t\u1eadp trung v\u00e0o lu\u1ed3ng gi\u00f3, ho\u1ea1t \u0111\u1ed9ng \u00eam \u00e1i v\u00e0 tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng;<\/p>\n

Khi c\u00e1c k\u1ef9 s\u01b0 thi\u1ebft k\u1ebf qu\u1ea1t, h\u1ecd \u01b0u ti\u00ean c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh, m\u1ee9c ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng v\u00e0 tu\u1ed5i th\u1ecd. Tuy nhi\u00ean, y\u1ebfu t\u1ed1 th\u1ef1c s\u1ef1 quy\u1ebft \u0111\u1ecbnh gi\u1edbi h\u1ea1n tr\u00ean c\u1ee7a tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng th\u01b0\u1eddng kh\u00f4ng ph\u1ea3i l\u00e0 v\u1ecf ngo\u00e0i, m\u00e0 l\u00e0 c\u00e1c linh ki\u1ec7n r\u1eddi b\u00ean trong kh\u00f4ng th\u1ec3 nh\u00ecn th\u1ea5y. B\u1eb1ng c\u00e1ch l\u1ef1a ch\u1ecdn gi\u1ea3i ph\u00e1p k\u1ebft h\u1ee3p \u0111i-\u1ed1t Schottky GK SS34 + b\u00f3ng b\u00e1n d\u1eabn NPN MMBT3904 + IC qu\u1ea3n l\u00fd pin lithium 4056H, qu\u1ea1t USB c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c: t\u1ed5n th\u1ea5t \u0111i\u1ec7n n\u0103ng th\u1ea5p h\u01a1n, ngu\u1ed3n \u0111i\u1ec7n \u1ed5n \u0111\u1ecbnh h\u01a1n, ho\u1ea1t \u0111\u1ed9ng \u00eam \u00e1i h\u01a1n v\u00e0 tu\u1ed5i th\u1ecd d\u00e0i h\u01a1n.<\/p>","protected":false},"excerpt":{"rendered":"

As soon as summer arrives, USB mini fans become \u201clifesavers\u201d in offices, dorm rooms, and on outdoor outings. Lightweight, portable,<\/p>","protected":false},"author":2,"featured_media":14865,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-14864","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.goodworksemi.com\/vi\/wp-json\/wp\/v2\/posts\/14864","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.goodworksemi.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.goodworksemi.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.goodworksemi.com\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.goodworksemi.com\/vi\/wp-json\/wp\/v2\/comments?post=14864"}],"version-history":[{"count":1,"href":"https:\/\/www.goodworksemi.com\/vi\/wp-json\/wp\/v2\/posts\/14864\/revisions"}],"predecessor-version":[{"id":14869,"href":"https:\/\/www.goodworksemi.com\/vi\/wp-json\/wp\/v2\/posts\/14864\/revisions\/14869"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.goodworksemi.com\/vi\/wp-json\/wp\/v2\/media\/14865"}],"wp:attachment":[{"href":"https:\/\/www.goodworksemi.com\/vi\/wp-json\/wp\/v2\/media?parent=14864"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.goodworksemi.com\/vi\/wp-json\/wp\/v2\/categories?post=14864"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.goodworksemi.com\/vi\/wp-json\/wp\/v2\/tags?post=14864"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}