{"id":9802,"date":"2025-12-04T00:43:43","date_gmt":"2025-12-04T00:43:43","guid":{"rendered":"https:\/\/imiapower.com\/?p=9802"},"modified":"2025-12-04T00:43:43","modified_gmt":"2025-12-04T00:43:43","slug":"constant-current-vs-constant-voltage","status":"publish","type":"post","link":"https:\/\/imiapower.com\/vi\/constant-current-vs-constant-voltage\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn t\u1ed1i \u01b0u v\u1ec1 d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i v\u00e0 \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i"},"content":{"rendered":"<p data-path-to-node=\"4\">Ch\u00fang ta \u0111\u01b0\u1ee3c bao quanh b\u1edfi nh\u1eefng &quot;vi\u00ean g\u1ea1ch \u0111en nh\u1ecf&quot; - b\u1ed9 s\u1ea1c \u0111i\u1ec7n tho\u1ea1i, ngu\u1ed3n m\u00e1y t\u00ednh x\u00e1ch tay v\u00e0 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u00e8n LED. Ch\u00fang ta th\u01b0\u1eddng d\u00f9ng thu\u1eadt ng\u1eef &quot;ngu\u1ed3n \u0111i\u1ec7n&quot; v\u00e0 &quot;b\u1ed9 s\u1ea1c&quot; thay th\u1ebf cho nhau, nh\u01b0ng v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt, ch\u00fang ho\u00e0n to\u00e0n kh\u00e1c nhau.<\/p>\n<p data-path-to-node=\"5\">S\u1eed d\u1ee5ng sai lo\u1ea1i pin kh\u00f4ng ch\u1ec9 khi\u1ebfn thi\u1ebft b\u1ecb kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng m\u00e0 c\u00f2n c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn qu\u00e1 nhi\u1ec7t, ch\u00e1y n\u1ed5 ho\u1eb7c h\u1ecfng v\u0129nh vi\u1ec5n thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed c\u1ee7a b\u1ea1n.<\/p>\n<p data-path-to-node=\"6\">B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o nh\u1eefng kh\u00e1c bi\u1ec7t c\u1ed1t l\u00f5i gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb n\u00e0y, t\u1eeb &quot;S\u1ef1 kh\u00e1c bi\u1ec7t c\u01a1 b\u1ea3n gi\u1eefa b\u1ed9 ngu\u1ed3n v\u00e0 b\u1ed9 s\u1ea1c&quot; cho \u0111\u1ebfn c\u00e1c c\u00f4ng ngh\u1ec7 c\u1ed1t l\u00f5i cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng cho ch\u00fang: <a href=\"https:\/\/imiapower.com\/products\/power-adapter\/12w-usb-power-adapter\/\">\u0110i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i (CV) v\u00e0 D\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i (CC)<\/a>.<\/p>\n<h2>1. S\u1ef1 kh\u00e1c bi\u1ec7t c\u1ed1t l\u00f5i: Ngu\u1ed3n \u0111i\u1ec7n so v\u1edbi B\u1ed9 s\u1ea1c<\/h2>\n<p data-path-to-node=\"9\">\u0110\u1ea7u ti\u00ean, ch\u00fang ta ph\u1ea3i l\u00e0m r\u00f5 quan ni\u1ec7m sai l\u1ea7m ph\u1ed5 bi\u1ebfn nh\u1ea5t.<\/p>\n<ul data-path-to-node=\"10\">\n<li>\n<p data-path-to-node=\"10,0,0\">Ngu\u1ed3n \u0111i\u1ec7n: Nhi\u1ec7m v\u1ee5 c\u1ee7a n\u00f3 l\u00e0 cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng m\u00e0 thi\u1ebft b\u1ecb c\u1ea7n \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng. N\u00f3 gi\u1ed1ng nh\u01b0 m\u1ed9t m\u00e1y b\u01a1m n\u01b0\u1edbc, cung c\u1ea5p \u201c\u00e1p su\u1ea5t\u201d \u1ed5n \u0111\u1ecbnh (\u0111i\u1ec7n \u00e1p), cho ph\u00e9p thi\u1ebft b\u1ecb (nh\u01b0 m\u00e1y t\u00ednh x\u00e1ch tay ho\u1eb7c \u0111\u00e8n LED) \u201cu\u1ed1ng\u201d (d\u00f2ng \u0111i\u1ec7n) v\u00e0 <i>l\u00e0m vi\u1ec7c ngay b\u00e2y gi\u1edd<\/i>.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"10,1,0\">B\u1ed9 s\u1ea1c: Nhi\u1ec7m v\u1ee5 c\u1ee7a n\u00f3 l\u00e0 n\u1ea1p n\u0103ng l\u01b0\u1ee3ng v\u00e0o pin. N\u00f3 gi\u1ed1ng nh\u01b0 m\u1ed9t m\u00e1y \u0111\u00f3ng chai th\u00f4ng minh h\u01a1n. N\u00f3 ph\u1ea3i <i>qu\u1ea3n l\u00fd<\/i> \u201cd\u00f2ng ch\u1ea3y\u201d (d\u00f2ng \u0111i\u1ec7n) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u201cb\u00ecnh\u201d (pin) \u0111\u01b0\u1ee3c n\u1ea1p \u0111\u1ea7y nhanh ch\u00f3ng nh\u01b0ng kh\u00f4ng qu\u00e1 m\u1ea1nh \u0111\u1ebfn m\u1ee9c b\u1ecb n\u1ed5.<\/p>\n<\/li>\n<\/ul>\n<p data-path-to-node=\"11\">B\u1ed9 ngu\u1ed3n cung c\u1ea5p \u0111i\u1ec7n n\u0103ng ngay l\u1eadp t\u1ee9c \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng; B\u1ed9 s\u1ea1c qu\u1ea3n l\u00fd vi\u1ec7c l\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng.<\/p>\n<h2>2. Hai ch\u1ebf \u0111\u1ed9 c\u1ed1t l\u00f5i: \u0110i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i (CV) so v\u1edbi D\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i (CC)<\/h2>\n<p data-path-to-node=\"14\">Cho d\u00f9 l\u00e0 ngu\u1ed3n \u0111i\u1ec7n hay b\u1ed9 s\u1ea1c, ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3 \u0111\u1ec1u \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi hai ch\u1ebf \u0111\u1ed9 c\u01a1 b\u1ea3n.<\/p>\n<h4>\u26a1 \u0110i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i (CV)<\/h4>\n<ul data-path-to-node=\"16\">\n<li>\n<p data-path-to-node=\"16,0,0\">\u0110\u1ecbnh ngh\u0129a: Duy tr\u00ec \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra c\u1ed1 \u0111\u1ecbnh, \u1ed5n \u0111\u1ecbnh (v\u00ed d\u1ee5: 5V, 12V, 24V).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"16,1,0\">Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng: \u0110i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c kh\u00f3a v\u00e0 d\u00f2ng \u0111i\u1ec7n cung c\u1ea5p thay \u0111\u1ed5i t\u00f9y theo t\u1ea3i (th\u1ee9 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi n\u00f3).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"16,2,0\">\u1ee8ng d\u1ee5ng:<\/p>\n<ol start=\"1\" data-path-to-node=\"16,2,1\">\n<li>\n<p data-path-to-node=\"16,2,1,0,0\">H\u1ea7u h\u1ebft c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed: M\u00e1y t\u00ednh x\u00e1ch tay, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 m\u00e0n h\u00ecnh c\u1ee7a b\u1ea1n \u0111\u1ec1u c\u1ea7n \u0111i\u1ec7n \u00e1p \u1ed5n \u0111\u1ecbnh \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"16,2,1,1,0\">\u201cNgu\u1ed3n \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i cho \u1ee9ng d\u1ee5ng LED\u201d: \u0110i\u1ec1u n\u00e0y l\u00fd t\u01b0\u1edfng cho c\u00e1c d\u1ea3i \u0111\u00e8n LED. T\u1ea1i sao? B\u1edfi v\u00ec c\u00e1c d\u1ea3i \u0111\u00e8n LED \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi \u0111i\u1ec7n tr\u1edf gi\u1edbi h\u1ea1n d\u00f2ng \u0111i\u1ec7n t\u00edch h\u1ee3p. Ch\u00fang ch\u1ec9 c\u1ea7n ngu\u1ed3n \u0111i\u1ec7n 12V ho\u1eb7c 24V \u1ed5n \u0111\u1ecbnh \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/p>\n<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n<h4>\u26a1 D\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i (CC)<\/h4>\n<ul data-path-to-node=\"18\">\n<li>\n<p data-path-to-node=\"18,0,0\">\u0110\u1ecbnh ngh\u0129a: Duy tr\u00ec d\u00f2ng \u0111i\u1ec7n \u0111\u1ea7u ra c\u1ed1 \u0111\u1ecbnh, \u1ed5n \u0111\u1ecbnh (v\u00ed d\u1ee5: 350mA, 700mA).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"18,1,0\">Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng: D\u00f2ng \u0111i\u1ec7n b\u1ecb kh\u00f3a v\u00e0 \u0111i\u1ec7n \u00e1p <i>t\u1ef1 \u0111\u1ed9ng \u0111i\u1ec1u ch\u1ec9nh<\/i> \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi t\u1ea3i tr\u1ecdng.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"18,2,0\">\u1ee8ng d\u1ee5ng:<\/p>\n<ol start=\"1\" data-path-to-node=\"18,2,1\">\n<li>\n<p data-path-to-node=\"18,2,1,0,0\">\u0110\u00e8n LED c\u00f4ng su\u1ea5t cao: \u0110\u00e2y l\u00e0 \u1ee9ng d\u1ee5ng ch\u00ednh c\u1ee7a CC. M\u1ed9t \u0111\u00e8n LED \u0111\u01a1n (nh\u01b0 \u0111\u00e8n r\u1ecdi) c\u1ef1c k\u1ef3 nh\u1ea1y c\u1ea3m v\u1edbi d\u00f2ng \u0111i\u1ec7n.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"18,2,1,1,0\">\u201cTr\u00ecnh \u0111i\u1ec1u khi\u1ec3n LED d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t\u201d: \u0110\u00e2y l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m quan tr\u1ecdng. Khi \u0111\u00e8n LED n\u00f3ng l\u00ean, \u0111i\u1ec7n tr\u1edf trong c\u1ee7a n\u00f3 gi\u1ea3m xu\u1ed1ng. N\u1ebfu b\u1ea1n s\u1eed d\u1ee5ng ngu\u1ed3n \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i (CV), \u0111i\u1ec7n \u00e1p \u1ed5n \u0111\u1ecbnh k\u1ebft h\u1ee3p v\u1edbi \u0111i\u1ec7n tr\u1edf th\u1ea5p h\u01a1n (\u0110\u1ecbnh lu\u1eadt Ohm: <span class=\"math-inline\" data-math=\"I = V\/R\">$I = V\/R$<\/span>) s\u1ebd g\u00e2y ra d\u00f2ng \u0111i\u1ec7n (<span class=\"math-inline\" data-math=\"I\">$I$<\/span>) t\u0103ng v\u1ecdt. \u0110i\u1ec1u n\u00e0y l\u00e0m cho \u0111\u00e8n LED n\u00f3ng h\u01a1n n\u1eefa, l\u00e0m gi\u1ea3m \u0111i\u1ec7n tr\u1edf c\u1ee7a n\u00f3 h\u01a1n n\u1eefa\u2026 m\u1ed9t v\u00f2ng lu\u1ea9n qu\u1ea9n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cCh\u1ea1y Tr\u1ed1n Nhi\u1ec7t\u201d d\u1eabn \u0111\u1ebfn \u0111\u00e8n LED b\u1ecb ch\u00e1y. M\u1ed9t b\u1ed9 \u0111i\u1ec1u khi\u1ec3n d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i s\u1ebd ng\u0103n ch\u1eb7n \u0111i\u1ec1u n\u00e0y b\u1eb1ng c\u00e1ch <i>\u00e9p bu\u1ed9c<\/i> d\u00f2ng \u0111i\u1ec7n v\u1eabn gi\u1eef nguy\u00ean b\u1ea5t k\u1ec3 nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i.<\/p>\n<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n<h2>3. Tr\u01b0\u1eddng h\u1ee3p \u1ee9ng d\u1ee5ng 1: L\u1ef1a ch\u1ecdn gi\u1ea3i ph\u00e1p chi\u1ebfu s\u00e1ng LED<\/h2>\n<p data-path-to-node=\"21\">Khi \u201cL\u1ef1a ch\u1ecdn gi\u1ea3i ph\u00e1p chi\u1ebfu s\u00e1ng LED c\u00f3 ngu\u1ed3n \u0111i\u1ec7n ph\u00f9 h\u1ee3p\u201d, b\u1ea1n ph\u1ea3i \u0111\u01b0a ra l\u1ef1a ch\u1ecdn.<\/p>\n<p data-path-to-node=\"22\">\u201cC\u00e1ch l\u1ef1a ch\u1ecdn gi\u1eefa tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n \u0111\u00e8n LED d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i v\u00e0 \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i cho \u0111\u00e8n LED\u201d:<\/p>\n<ul data-path-to-node=\"23\">\n<li>\n<p data-path-to-node=\"23,0,0\">Ch\u1ecdn tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i (CV) n\u1ebfu:<\/p>\n<ul data-path-to-node=\"23,0,1\">\n<li>\n<p data-path-to-node=\"23,0,1,0,0\">B\u1ea1n \u0111ang s\u1eed d\u1ee5ng d\u1ea3i \u0111\u00e8n LED.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"23,0,1,1,0\">B\u1ea1n \u0111ang s\u1eed d\u1ee5ng c\u00e1c m\u00f4-\u0111un LED \u0111\u00e3 c\u00f3 s\u1eb5n tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c \u0111i\u1ec7n tr\u1edf t\u00edch h\u1ee3p.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"23,0,1,2,0\">B\u1ea1n c\u1ea7n n\u1ed1i nhi\u1ec1u \u0111\u00e8n LED song song v\u00e0 mu\u1ed1n t\u1ea5t c\u1ea3 ch\u00fang \u0111\u1ec1u nh\u1eadn \u0111\u01b0\u1ee3c c\u00f9ng m\u1ed9t \u0111i\u1ec7n \u00e1p.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p data-path-to-node=\"23,1,0\">Ch\u1ecdn tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i (CC) n\u1ebfu:<\/p>\n<ul data-path-to-node=\"23,1,1\">\n<li>\n<p data-path-to-node=\"23,1,1,0,0\">B\u1ea1n \u0111ang s\u1eed d\u1ee5ng \u0111\u00e8n LED c\u00f4ng su\u1ea5t cao, ri\u00eang l\u1ebb ho\u1eb7c n\u1ed1i ti\u1ebfp (v\u00ed d\u1ee5: \u0111\u00e8n r\u1ecdi COB, \u0111\u00e8n \u0111\u01b0\u1eddng).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"23,1,1,1,0\">Thi\u1ebft b\u1ecb LED c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 r\u00f5 r\u00e0ng l\u00e0 c\u00f3 d\u00f2ng \u0111i\u1ec7n \u0111\u1ea7u v\u00e0o kh\u00f4ng \u0111\u1ed5i \u201cXXX mA\u201d.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"23,1,1,2,0\">B\u1ea1n \u0111ang t\u00ecm ki\u1ebfm hi\u1ec7u qu\u1ea3 t\u1ed1i \u0111a, kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t \u0111\u1ed9 s\u00e1ng v\u00e0 tu\u1ed5i th\u1ecd \u0111\u00e8n LED d\u00e0i nh\u1ea5t c\u00f3 th\u1ec3.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>4. Tr\u01b0\u1eddng h\u1ee3p \u1ee9ng d\u1ee5ng 2: B\u1ed9 s\u1ea1c pin hi\u1ec7n \u0111\u1ea1i<\/h2>\n<p data-path-to-node=\"26\">\u0110\u00e2y c\u00f3 l\u1ebd l\u00e0 \u1ee9ng d\u1ee5ng tinh t\u1ebf nh\u1ea5t c\u1ee7a c\u1ea3 hai ch\u1ebf \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau. B\u1ed9 s\u1ea1c pin hi\u1ec7n \u0111\u1ea1i, \u0111\u1eb7c bi\u1ec7t l\u00e0 &quot;thi\u1ebft k\u1ebf b\u1ed9 s\u1ea1c pin CC-CV \u0111\u1ea3m b\u1ea3o an to\u00e0n cho pin lithium&quot;, l\u00e0 minh ch\u1ee9ng ho\u00e0n h\u1ea3o cho s\u1ef1 k\u1ebft h\u1ee3p n\u00e0y.<\/p>\n<p data-path-to-node=\"27\">\u201cB\u1ed9 s\u1ea1c s\u1eed d\u1ee5ng ch\u1ebf \u0111\u1ed9 \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i v\u00e0 ch\u1ebf \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch\u201d:<\/p>\n<p data-path-to-node=\"28\">Qu\u00e1 tr\u00ecnh s\u1ea1c pin lithium-ion th\u01b0\u1eddng c\u00f3 ba giai \u0111o\u1ea1n:<\/p>\n<ol start=\"1\" data-path-to-node=\"29\">\n<li>\n<p data-path-to-node=\"29,0,0\">S\u1ea1c tr\u01b0\u1edbc (n\u1ebfu c\u1ea7n): N\u1ebfu pin b\u1ecb x\u1ea3 qu\u00e1 m\u1ee9c, b\u1ed9 s\u1ea1c s\u1ebd s\u1eed d\u1ee5ng d\u00f2ng \u0111i\u1ec7n nh\u1ecf, nh\u1eb9 \u0111\u1ec3 \u0111\u00e1nh th\u1ee9c pin m\u1ed9t c\u00e1ch an to\u00e0n.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"29,1,0\">Giai \u0111o\u1ea1n d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i (CC): \u0110\u00e2y l\u00e0 giai \u0111o\u1ea1n s\u1ea1c ch\u00ednh. Pin \u0111ang \u1edf m\u1ee9c \u0111i\u1ec7n \u00e1p th\u1ea5p, do \u0111\u00f3 b\u1ed9 s\u1ea1c s\u1ebd cung c\u1ea5p cho pin. <i>nhanh nh\u1ea5t, an to\u00e0n nh\u1ea5t, d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i<\/i> (v\u00ed d\u1ee5: 2A). Trong th\u1eddi gian n\u00e0y, \u0111i\u1ec7n \u00e1p c\u1ee7a pin t\u0103ng \u0111\u1ec1u \u0111\u1eb7n.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"29,2,0\">Giai \u0111o\u1ea1n \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i (CV): Khi \u0111i\u1ec7n \u00e1p c\u1ee7a pin \u0111\u1ea1t \u0111\u1ebfn \u0111\u1ec9nh (v\u00ed d\u1ee5: 4,2V), b\u1ed9 s\u1ea1c s\u1ebd ngay l\u1eadp t\u1ee9c chuy\u1ec3n ch\u1ebf \u0111\u1ed9. N\u00f3 <i>kh\u00f3a \u0111i\u1ec7n \u00e1p \u1edf m\u1ee9c 4.2V<\/i> v\u00e0 gi\u1eef n\u00f3 \u1edf \u0111\u00f3. Khi pin \u0111\u1ea7y, \u0111i\u1ec7n tr\u1edf b\u00ean trong t\u0103ng l\u00ean v\u00e0 d\u00f2ng \u0111i\u1ec7n s\u1ea1c t\u1ef1 nhi\u00ean gi\u1ea3m xu\u1ed1ng.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"29,3,0\">K\u1ebft th\u00fac: Khi d\u00f2ng \u0111i\u1ec7n gi\u1ea3m xu\u1ed1ng m\u1ee9c r\u1ea5t th\u1ea5p (v\u00ed d\u1ee5: 0,1A), b\u1ed9 s\u1ea1c, c\u00f3 th\u1ec3 l\u00e0 B\u1ed9 s\u1ea1c th\u00f4ng minh, s\u1ebd bi\u1ebft pin \u0111\u00e3 \u0111\u1ea7y v\u00e0 d\u1eebng qu\u00e1 tr\u00ecnh ho\u00e0n to\u00e0n.<\/p>\n<\/li>\n<\/ol>\n<p data-path-to-node=\"30\">C\u01a1 ch\u1ebf CC-CV n\u00e0y l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 s\u1ea1c pin nhanh ch\u00f3ng v\u00e0 an to\u00e0n, ng\u0103n ng\u1eeba t\u00ecnh tr\u1ea1ng s\u1ea1c qu\u00e1 m\u1ee9c g\u00e2y nguy hi\u1ec3m.<\/p>\n<h2>5. Ch\u1ee7 \u0111\u1ec1 n\u00e2ng cao: Chuy\u1ec3n \u0111\u1ed5i \u0111i\u1ec7n n\u0103ng v\u00e0 thi\u1ebft k\u1ebf m\u1ea1ch<\/h2>\n<p data-path-to-node=\"33\">L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c logic ph\u1ee9c t\u1ea1p n\u00e0y?<\/p>\n<ul data-path-to-node=\"34\">\n<li>\n<p data-path-to-node=\"34,0,0\">B\u1ed9 chuy\u1ec3n \u0111\u1ed5i DC-DC:<\/p>\n<ul data-path-to-node=\"34,0,1\">\n<li>\n<p data-path-to-node=\"34,0,1,0,0\">\u201cB\u1ed9 chuy\u1ec3n \u0111\u1ed5i DC-DC h\u1ea1 \u00e1p \u0111\u1ec3 c\u1ea5p ngu\u1ed3n cho d\u1ea3i \u0111\u00e8n LED v\u00e0 c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n \u00e1p th\u1ea5p\u201d: \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u1ea5y \u0111i\u1ec7n \u00e1p cao h\u01a1n (v\u00ed d\u1ee5: b\u1ed9 \u0111\u1ed5i ngu\u1ed3n 24V) v\u00e0 \u201ch\u1ea1 \u00e1p\u201d hi\u1ec7u qu\u1ea3 xu\u1ed1ng 12V cho d\u1ea3i \u0111\u00e8n LED ho\u1eb7c 5V cho thi\u1ebft b\u1ecb USB.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p data-path-to-node=\"34,1,0\">\u201cB\u1ed9 chuy\u1ec3n \u0111\u1ed5i DC-DC t\u0103ng c\u01b0\u1eddng \u0111\u1ec3 t\u0103ng \u0111i\u1ec7n \u00e1p s\u1ea1c pin\u201d: B\u1ed9 chuy\u1ec3n \u0111\u1ed5i n\u00e0y c\u00f3 th\u1ec3 l\u1ea5y \u0111\u1ea7u v\u00e0o USB 5V v\u00e0 \u201ct\u0103ng c\u01b0\u1eddng\u201d l\u00ean 12,6V c\u1ea7n thi\u1ebft \u0111\u1ec3 s\u1ea1c b\u1ed9 pin lithium 3 cell (11,1V).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"34,2,0\">Chuy\u1ec3n \u0111\u1ed5i ngu\u1ed3n \u0111i\u1ec7n th\u00e0nh b\u1ed9 s\u1ea1c:<\/p>\n<ul data-path-to-node=\"34,2,1\">\n<li>\n<p data-path-to-node=\"34,2,1,0,0\">B\u1ea1n c\u00f3 th\u1ec3 n\u00f3i v\u1ec1 ch\u1ee7 \u0111\u1ec1 \u201cS\u1eed d\u1ee5ng \u0111i\u1ed1t v\u00e0 m\u1ea1ch ph\u1ea3n h\u1ed3i \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i ngu\u1ed3n \u0111i\u1ec7n th\u00e0nh b\u1ed9 s\u1ea1c\u201d kh\u00f4ng?<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"34,2,1,1,0\">V\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt th\u00ec \u0111\u00fang, nh\u01b0ng \u0111i\u1ec1u n\u00e0y c\u1ef1c k\u1ef3 kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi pin hi\u1ec7n \u0111\u1ea1i.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"34,2,1,2,0\">M\u1ed9t diode \u0111\u01a1n gi\u1ea3n ch\u1ec9 ng\u0103n ch\u1eb7n d\u00f2ng \u0111i\u1ec7n ng\u01b0\u1ee3c; n\u00f3 <i>kh\u00f4ng th\u1ec3<\/i> th\u1ef1c hi\u1ec7n logic CC-CV.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"34,2,1,3,0\">M\u1ed9t chuy\u1ec3n \u0111\u1ed5i ph\u00f9 h\u1ee3p \u0111\u00f2i h\u1ecfi m\u1ed9t \u201cThi\u1ebft k\u1ebf m\u1ea1ch ph\u1ea3n h\u1ed3i trong qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i v\u00e0 \u0111i\u1ec1u ch\u1ec9nh b\u1ed9 s\u1ea1c\u201d ph\u1ee9c t\u1ea1p. M\u1ea1ch ph\u1ea3n h\u1ed3i n\u00e0y ph\u1ea3i ch\u1ee7 \u0111\u1ed9ng gi\u00e1m s\u00e1t <i>c\u1ea3 hai<\/i> \u0111i\u1ec7n \u00e1p v\u00e0 d\u00f2ng \u0111i\u1ec7n \u0111\u1ea7u ra, sau \u0111\u00f3 \u0111i\u1ec1u khi\u1ec3n b\u1ed9 chuy\u1ec3n \u0111\u1ed5i DC-DC m\u1ed9t c\u00e1ch linh ho\u1ea1t \u0111\u1ec3 tu\u00e2n theo \u0111\u01b0\u1eddng cong s\u1ea1c CC-CV ch\u00ednh x\u00e1c.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>6. K\u1ebft lu\u1eadn: L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u01b0a ra l\u1ef1a ch\u1ecdn \u0111\u00fang \u0111\u1eafn<\/h2>\n<p data-path-to-node=\"37\">Cu\u1ed1i c\u00f9ng, ch\u00fang ta h\u00e3y quay l\u1ea1i v\u1edbi thu\u1eadt ng\u1eef bao h\u00e0m t\u1ea5t c\u1ea3: B\u1ed9 \u0111\u1ed5i ngu\u1ed3n.<\/p>\n<p data-path-to-node=\"38\">Khi \u201cCh\u1ecdn b\u1ed9 \u0111\u1ed5i ngu\u1ed3n ph\u00f9 h\u1ee3p cho b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u00e8n LED v\u00e0 b\u1ed9 s\u1ea1c pin\u201d, b\u1ea1n ph\u1ea3i nh\u1edb:<\/p>\n<ol start=\"1\" data-path-to-node=\"39\">\n<li>\n<p data-path-to-node=\"39,0,0\">\u0110\u1ecdc nh\u00e3n!<\/p>\n<ul data-path-to-node=\"39,0,1\">\n<li>\n<p data-path-to-node=\"39,0,1,0,0\"><code>\u0110\u1ea7u ra: 12V \u2393 2A<\/code> (V c\u1ed1 \u0111\u1ecbnh) = Ngu\u1ed3n \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i (CV).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"39,0,1,1,0\"><code>\u0110\u1ea7u ra: 700mA, 20-40VDC<\/code> (c\u1ed1 \u0111\u1ecbnh A) = B\u1ed9 \u0111i\u1ec1u khi\u1ec3n LED d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i (CC).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"39,0,1,2,0\"><code>\u0110\u1ea7u ra: 4.2V \/ 1A<\/code> (th\u01b0\u1eddng c\u00f3 bi\u1ec3u t\u01b0\u1ee3ng \u201cB\u1ed9 s\u1ea1c\u201d ho\u1eb7c pin) = B\u1ed9 s\u1ea1c pin.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p data-path-to-node=\"39,1,0\">S\u1eed d\u1ee5ng \u0111\u00fang c\u00f4ng c\u1ee5 cho c\u00f4ng vi\u1ec7c!<\/p>\n<ul data-path-to-node=\"39,1,1\">\n<li>\n<p data-path-to-node=\"39,1,1,0,0\">KH\u00d4NG BAO GI\u1edc s\u1eed d\u1ee5ng Ngu\u1ed3n \u0111i\u1ec7n CV \u0111\u1ec3 <i>tr\u1ef1c ti\u1ebfp<\/i> cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng cho \u0111\u00e8n LED c\u00f4ng su\u1ea5t cao (\u0111\u00e8n s\u1ebd b\u1ecb ch\u00e1y).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"39,1,1,1,0\">KH\u00d4NG BAO GI\u1edc s\u1eed d\u1ee5ng Tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n \u0111\u00e8n LED CC \u0111\u1ec3 c\u1ea5p ngu\u1ed3n cho m\u00e1y t\u00ednh x\u00e1ch tay c\u1ee7a b\u1ea1n (n\u00f3 s\u1ebd b\u1ecb h\u1ecfng).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"39,1,1,2,0\">KH\u00d4NG BAO GI\u1edc s\u1eed d\u1ee5ng B\u1ed9 ngu\u1ed3n CV ti\u00eau chu\u1ea9n \u0111\u1ec3 s\u1ea1c pin lithium-ion (\u0111i\u1ec1u n\u00e0y c\u1ef1c k\u1ef3 nguy hi\u1ec3m v\u00e0 c\u00f3 th\u1ec3 g\u00e2y ra h\u1ecfa ho\u1ea1n l\u1edbn).<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p data-path-to-node=\"40\">Hi\u1ec3u \u0111\u01b0\u1ee3c s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa CV v\u00e0 CC kh\u00f4ng ch\u1ec9 l\u00e0 ki\u1ebfn th\u1ee9c k\u1ef9 thu\u1eadt \u0111\u01a1n thu\u1ea7n m\u00e0 c\u00f2n l\u00e0 b\u01b0\u1edbc quan tr\u1ecdng \u0111\u1ec3 gi\u1eef an to\u00e0n cho thi\u1ebft b\u1ecb v\u00e0 ch\u00ednh b\u1ea1n.<\/p>","protected":false},"excerpt":{"rendered":"<p>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ngu\u1ed3n \u0111i\u1ec7n d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i (CC) v\u00e0 ngu\u1ed3n \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i (CV) l\u00e0 g\u00ec? S\u1eed d\u1ee5ng sai ngu\u1ed3n \u0111i\u1ec7n c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng \u0111\u00e8n LED ho\u1eb7c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed c\u1ee7a b\u1ea1n. H\u01b0\u1edbng d\u1eabn n\u00e0y s\u1ebd ph\u00e2n t\u00edch m\u1ecdi th\u00f4ng tin b\u1ea1n c\u1ea7n bi\u1ebft v\u1ec1 CV so v\u1edbi CC, l\u00fd do t\u1ea1i sao tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n LED kh\u00e1c v\u1edbi b\u1ed9 s\u1ea1c v\u00e0 c\u00e1ch ch\u1ecdn ngu\u1ed3n \u0111i\u1ec7n ph\u00f9 h\u1ee3p cho d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n.<\/p>","protected":false},"author":1,"featured_media":4595,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rank_math_lock_modified_date":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[361],"tags":[],"class_list":["post-9802","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/imiapower.com\/vi\/wp-json\/wp\/v2\/posts\/9802","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/imiapower.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/imiapower.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/imiapower.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/imiapower.com\/vi\/wp-json\/wp\/v2\/comments?post=9802"}],"version-history":[{"count":3,"href":"https:\/\/imiapower.com\/vi\/wp-json\/wp\/v2\/posts\/9802\/revisions"}],"predecessor-version":[{"id":9806,"href":"https:\/\/imiapower.com\/vi\/wp-json\/wp\/v2\/posts\/9802\/revisions\/9806"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/imiapower.com\/vi\/wp-json\/wp\/v2\/media\/4595"}],"wp:attachment":[{"href":"https:\/\/imiapower.com\/vi\/wp-json\/wp\/v2\/media?parent=9802"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/imiapower.com\/vi\/wp-json\/wp\/v2\/categories?post=9802"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/imiapower.com\/vi\/wp-json\/wp\/v2\/tags?post=9802"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}