{"id":929,"date":"2025-03-24T14:08:02","date_gmt":"2025-03-24T06:08:02","guid":{"rendered":"https:\/\/dt9025a.top\/?p=929"},"modified":"2025-03-25T16:29:43","modified_gmt":"2025-03-25T08:29:43","slug":"%e7%94%b5%e6%84%9f%e5%9e%8b-dc-dc-%e7%94%b5%e6%ba%90%e7%9a%84%e5%9f%ba%e7%a1%80%e6%8b%93%e6%89%91%ef%bc%9abuck-%e4%b8%8e-boost","status":"publish","type":"post","link":"https:\/\/dt9025a.top\/?p=929","title":{"rendered":"\u7535\u611f\u578b DC-DC \u7535\u6e90\u7684\u57fa\u7840\u62d3\u6251\uff1aBuck\u3001Boost \u4e0e Buck-Boost"},"content":{"rendered":"\n

\u7535\u611f\u578b DC-DC \u7535\u6e90\u62d3\u6251\u7684\u7ec4\u6210\u65e0\u5916\u4e4e\u5f00\u5173\u3001\u7535\u611f\u4e0e\u7535\u5bb9\u7684\u7ec4\u5408\u53d8\u6362\uff0c\u672c\u6587\u8bb0\u5f55\u4e86\u5e38\u89c1\u5e38\u7528\u7684\u7535\u611f\u578b DC-DC \u7535\u6e90\u7684\u57fa\u7840\u62d3\u6251\u7ed3\u6784\uff0c\u5305\u62ec Buck\u3001Boost \u4e0e Buck-Boost \u4e09\u7c7b\u7ed3\u6784\u7684\u7b80\u8981\u8bf4\u660e\u89e3\u91ca\u3002<\/p>\n\n\n\n\n\n\n\n

\n\n\n\n

\u524d\u7f6e\u77e5\u8bc6\uff1a\u7535\u611f\u7684\u4f0f\u79d2\u5e73\u8861<\/h2>\n\n\n\n
\u4f0f\u79d2\u539f\u5219\uff1a\u5904\u4e8e\u7a33\u5b9a\u72b6\u6001\u7684\u7535\u611f\uff0c\u5f00\u5173\u5bfc\u901a\u65f6\u95f4\uff08\u7535\u6d41\u4e0a\u5347\u6bb5\uff09\u7684\u4f0f\u79d2\u6570\u987b\u4e0e\u5f00\u5173\u5173\u65ad\uff08\u7535\u6d41\u4e0b\u964d\u6bb5\uff09\u65f6\u7684\u4f0f\u79d2\u6570\u5728\u6570\u503c\u4e0a\u76f8\u7b49\uff0c\u5c3d\u7ba1\u4e24\u8005\u7b26\u53f7\u76f8\u53cd\u3002\u8fd9\u4e5f\u8868\u793a\uff0c\u7ed8\u51fa\u7535\u611f\u7535\u538b\u5bf9\u65f6\u95f4\u7684\u66f2\u7ebf\uff0c\u5bfc\u901a\u65f6\u6bb5\u66f2\u7ebf\u7684\u9762\u79ef\u5fc5\u987b\u7b49\u4e8e\u5173\u65ad\u65f6\u6bb5\u66f2\u7ebf\u7684\u9762\u79ef\u3002\u7528\u516c\u5f0f\u8868\u793a\u5373\u4e3a\uff1a<\/p>\n\n\n\n$$\nV_{on}\\times T_{on}=V_{off}\\times T_{off}\n$$\n\n\n\n
\n\n\n\n

1\u3001Buck\uff08\u964d\u538b\u578b\uff09\u62d3\u6251<\/h2>\n\n\n
\n
$\"\"$ <\/figure>\n<\/div>\n\n\n
Buck \u62d3\u6251\u7684\u7ed3\u6784\u5982\u56fe\uff0cSW \u4e3a\u529f\u7387\u5f00\u5173\uff0cL \u4e3a\u529f\u7387\u7535\u611f\uff0cD \u4e3a\u529f\u7387\uff08\u7eed\u6d41\uff09\u4e8c\u6781\u7ba1\u3002<\/p>\n\n\n
\n
$\"\"$ <\/figure>\n<\/div>\n\n\n
\u5f00\u5173 SW \u95ed\u5408\u65f6\uff0c\u7535\u6d41\u8def\u5f84\u5982\u7070\u8272\u7bad\u5934\u6240\u793a\u65b9\u5411\u6d41\u52a8\u3002\u6b64\u65f6\uff0c\u7535\u611f\u4e0e\u8f93\u51fa\u7535\u5bb9\u88ab\u4e32\u8054\u5728\u7535\u6e90\u4e0a\u540c\u65f6\u5145\u7535\uff0c\u7535\u611f\u4e0a\u4f53\u73b0\u7684\u7535\u538b\u6781\u6027\u4e3a\u5de6\u6b63\u53f3\u8d1f\uff0c\u4e8c\u6781\u7ba1 D \u7531\u4e8e\u53cd\u5411\u7535\u538b\u7684\u5b58\u5728\u800c\u5904\u4e8e\u622a\u6b62\u72b6\u6001\u3002<\/p>\n\n\n
\n
$\"\"$ <\/figure>\n<\/div>\n\n\n
\u5f00\u5173 SW \u65ad\u5f00\u65f6\uff0c\u7531\u4e8e\u7535\u611f \u201c\u6765\u62d2\u53bb\u7559\u201d \u7684\u7279\u6027\uff0c\u7535\u611f L \u4f1a\u5c3d\u529b\u7ef4\u6301\u7535\u8def\u4e2d\u7535\u6d41\u7684\u6052\u5b9a\u4e0d\u4f1a\u7a81\u53d8\u3002\u56e0\u6b64\uff0c\u7535\u611f\u4e24\u7aef\u7684\u7535\u538b\u6781\u6027\u88ab\u53cd\u8f6c\uff0c\u7ed9\u8f93\u51fa\u7535\u5bb9 C \u4ee5\u53ca\u8d1f\u8f7d\u8fdb\u884c\u4f9b\u7535\u3002\u4e3a\u4e86\u5728 SW \u65ad\u5f00\u540e\u4ecd\u6709\u7535\u6d41\u56de\u8def\u5b58\u5728\uff0c\u4e8c\u6781\u7ba1 D \u4f5c\u4e3a\u4e32\u8054\u5728\u56de\u8def\u4e2d\u7684\u7eed\u6d41\u4e8c\u6781\u7ba1\u88ab\u5bfc\u901a\u3002\u7535\u8def\u4e2d\u7535\u6d41\u8def\u5f84\u5982\u7070\u8272\u7bad\u5934\u6240\u793a\u3002<\/p>\n\n\n\n
\u5c31\u8fd9\u6837\uff0c\u5f00\u5173\u4e0d\u65ad\u5730\u5f00\u542f\u4e0e\u5173\u95ed\uff0c\u7535\u611f\u4e0a\u7684\u80fd\u91cf\u5c31\u4e0d\u65ad\u5730\u88ab\u5145\u5165\u4e0e\u91ca\u653e\uff0c\u8fbe\u5230\u4e00\u4e2a\u52a8\u6001\u5e73\u8861\u3002\u7531\u4e8e\u5145\u80fd\u8fc7\u7a0b\u4e2d\u7535\u611f\u4e0e\u8f93\u51fa\u7535\u5bb9\u5904\u4e8e\u4e32\u8054\u72b6\u6001\uff0c\u4e14\u653e\u80fd\u8fc7\u7a0b\u4e2d\u7535\u611f\u4e0e\u8f93\u51fa\u7535\u5bb9\u5904\u4e8e\u5e76\u8054\u72b6\u6001\uff0c\u6240\u4ee5\u7535\u5bb9\u4e24\u7aef\u7684\u7535\u538b\u6c38\u8fdc\u4e0d\u80fd\u8d85\u8fc7\u7535\u6e90\u7535\u538b\u3002\u8fd9\u5c31\u662f\u964d\u538b\u578b\u62d3\u6251\uff0c\u4e5f\u79f0\u4e3a Buck \u62d3\u6251\u3002<\/p>\n\n\n\n
\n\n\n\n
\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4f0f\u79d2\u5e73\u8861\u6765\u5bf9 Buck \u7535\u8def\u7684\u8f93\u51fa\u7535\u538b\u4e0e\u5360\u7a7a\u6bd4\u5173\u7cfb\u8fdb\u884c\u63a8\u5bfc\u3002\u5047\u8bbe\u4e00\u4e2a\u5468\u671f\u5185\uff0c\u5f00\u5173\u5f00\u542f\u7684\u65f6\u957f\u4e3a DT\uff0c\u5f00\u5173\u5173\u65ad\u7684\u65f6\u957f\u4e3a (1-D)T\uff0c\u4e8c\u6781\u7ba1\u4e0e\u5f00\u5173\u5747\u4e3a\u7406\u60f3\u5668\u4ef6\uff0c\u5219\u6709\uff1a<\/p>\n\n\n\n$$\n\\left\\{\\begin{matrix} \n V_{on}=V_{in}-V_{out} \\\\\n V_{off}=V_{out}\n\\end{matrix}\\right.\n$$\n\n\n\n$$\n\\begin{align}\n V_{on}\\times DT&=V_{off}\\times (1-D)T \\\\\n (V_{in}-V_{out})DT&=V_{out}(1-D)T \\\\\n V_{out}&=DV_{in}\\\\\n \\frac{V_{out}}{V_{in}} &=D\n\\end{align}\n$$\n\n\n\n
\n\n\n\n
\u540c\u65f6\uff0c\u5bf9\u540c\u6b65 Buck \u7535\u8def\u8fd8\u6709\u53e6\u4e00\u79cd\u7406\u89e3\u65b9\u6cd5\uff1a\u529f\u7387\u5f00\u5173\u4ea7\u751f\u7684\u4e0d\u540c\u5360\u7a7a\u6bd4\u7684\u65b9\u6ce2\u5177\u6709\u4e0d\u540c\u7684\u76f4\u6d41\u5206\u91cf\uff08\u65a9\u6ce2\uff09\uff0c\u529f\u7387\u7ea7\u7684 L \u4e0e C \u7ec4\u6210\u4e86 LC \u6ee4\u6ce2\u7f51\u7edc\uff0c\u5c06\u4e0d\u540c\u7684\u76f4\u6d41\u5206\u91cf\u63d0\u53d6\u51fa\u6765\uff0c\u5f97\u5230\u76f4\u6d41\u5206\u91cf\u7684\u8f93\u51fa\u3002<\/p>\n\n\n\n
2\u3001Boost\uff08\u5347\u538b\u578b\uff09\u62d3\u6251<\/h2>\n\n\n
\n
$\"\"$ <\/figure>\n<\/div>\n\n\n
Boost \u62d3\u6251\u7684\u7ed3\u6784\u5982\u56fe\uff0cSW \u4e3a\u529f\u7387\u5f00\u5173\uff0cL \u4e3a\u529f\u7387\u7535\u611f\uff0cD \u4e3a\u529f\u7387\uff08\u7eed\u6d41\uff09\u4e8c\u6781\u7ba1\u3002<\/p>\n\n\n
\n
$\"\"$ <\/figure>\n<\/div>\n\n\n
\u5f53\u5f00\u5173 SW \u95ed\u5408\u65f6\uff0c\u7535\u6e90\u901a\u8fc7\u7070\u8272\u7bad\u5934\u6240\u793a\u7684\u7535\u6d41\u65b9\u5411\u4e3a\u7535\u611f L \u5145\u7535\uff0c\u6b64\u65f6\u7535\u611f\u4e0a\u7684\u7535\u538b\u65b9\u5411\u5982\u56fe\u6240\u793a\u3002<\/p>\n\n\n
\n
$\"\"$ <\/figure>\n<\/div>\n\n\n
\u5f53\u5f00\u5173 SW \u65ad\u5f00\u65f6\uff0c\u7531\u4e8e\u7535\u611f\u4e0a\u7684\u7535\u6d41\u4e0d\u80fd\u7a81\u53d8\uff0cL \u4e3a\u4e86\u7ef4\u6301\u7535\u6d41\u65b9\u5411\u800c\u7ffb\u8f6c\u4e86\u81ea\u8eab\u7684\u7535\u538b\u6781\u6027\uff0c\u4f53\u73b0\u4e3a\u5de6\u8d1f\u53f3\u6b63\u3002\u6b64\u65f6\uff0c\u7535\u6e90\u4e0e\u7535\u611f\u5448\u73b0\u4e32\u8054\u7ed3\u6784\uff0c\u5171\u540c\u901a\u8fc7\u7eed\u6d41\u4e8c\u6781\u7ba1\u4e3a\u8f93\u51fa\u7535\u5bb9 C \u8fdb\u884c\u5145\u7535\u3002<\/p>\n\n\n\n
\u4e0e Buck \u7ed3\u6784\u4e0d\u540c\uff0cBoost \u7ed3\u6784\u4ec5\u5728\u5f00\u5173\u65ad\u5f00\u65f6\u4e3a\u8f93\u51fa\u7535\u5bb9\u8fdb\u884c\u5145\u7535\uff0c\u4e14\u5145\u7535\u8fc7\u7a0b\u4e2d\u76f8\u5f53\u4e8e\u4e24\u4e2a\u7535\u6e90\u4e32\u8054\u8f93\u51fa\u3002\u56e0\u6b64\uff0cBoost \u7ed3\u6784\u7684\u8f93\u51fa\u7535\u538b\u603b\u662f\u5927\u4e8e\u8f93\u5165\u7535\u538b\u7684\uff0c\u4e3a\u5347\u538b\u62d3\u6251\u7ed3\u6784\u3002<\/p>\n\n\n\n
\n\n\n\n
\u901a\u8fc7\u4f0f\u79d2\u5e73\u8861\u6765\u5bf9 Boost \u7535\u8def\u7684\u8f93\u51fa\u7535\u538b\u4e0e\u5360\u7a7a\u6bd4\u5173\u7cfb\u8fdb\u884c\u63a8\u5bfc\u3002\u5047\u8bbe\u4e00\u4e2a\u5468\u671f\u5185\uff0c\u5f00\u5173\u5f00\u542f\u7684\u65f6\u957f\u4e3a DT\uff0c\u5f00\u5173\u5173\u65ad\u7684\u65f6\u957f\u4e3a (1-D)T\uff0c\u4e8c\u6781\u7ba1\u4e0e\u5f00\u5173\u5747\u4e3a\u7406\u60f3\u5668\u4ef6\uff0c\u5219\u6709\uff1a<\/p>\n\n\n\n$$\n\\left\\{\\begin{matrix} \n V_{on}=V_{in} \\\\\n V_{off}=V_{out}-V_{in}\n\\end{matrix}\\right.\n$$\n\n\n\n$$\n\\begin{align}\n V_{on}\\times DT&=V_{off}\\times (1-D)T \\\\\n V_{in}DT&=(V_{out}-V_{in})(1-D)T \\\\\n V_{out}&=\\frac{1}{1-D} V_{in}\\\\\n \\frac{V_{out}}{V_{in}} &=\\frac{1}{1-D}\n\\end{align}\n$$\n\n\n\n
3\u3001Buck-Boost\uff08\u5347\u964d\u538b\u578b\uff09\u62d3\u6251<\/h2>\n\n\n
\n
$\"\"$ <\/figure>\n<\/div>\n\n\n
Buck-Boost \u62d3\u6251\u7684\u7ed3\u6784\u5982\u56fe\uff0cSW \u4e3a\u529f\u7387\u5f00\u5173\uff0cL \u4e3a\u529f\u7387\u7535\u611f\uff0cD \u4e3a\u529f\u7387\uff08\u7eed\u6d41\uff09\u4e8c\u6781\u7ba1\u3002<\/p>\n\n\n
\n
$\"\"$ <\/figure>\n<\/div>\n\n\n
\u5f53\u5f00\u5173 HS \u95ed\u5408\u65f6\uff0c\u7535\u6e90\u901a\u8fc7\u7070\u8272\u7bad\u5934\u6240\u793a\u7684\u7535\u6d41\u65b9\u5411\u4e3a\u7535\u611f L \u5145\u7535\uff0c\u6b64\u65f6\u7535\u611f\u4e0a\u7684\u7535\u538b\u65b9\u5411\u4e3a\u4e0a\u6b63\u4e0b\u8d1f\uff0c\u7eed\u6d41\u4e8c\u6781\u7ba1 D \u53cd\u76f8\u622a\u6b62\u3002<\/p>\n\n\n
\n
$\"\"$ <\/figure>\n<\/div>\n\n\n
\u5f53\u5f00\u5173 HS \u65ad\u5f00\u65f6\uff0c\u7531\u4e8e\u7535\u611f\u7535\u6d41\u65e0\u6cd5\u7a81\u53d8\uff0c\u56e0\u6b64\u7535\u611f\u4f1a\u53cd\u8f6c\u81ea\u5df1\u7684\u7535\u538b\u6781\u6027\uff0c\u53d8\u4e3a\u4e0a\u8d1f\u4e0b\u6b63\u3002\u6b64\u65f6\u7535\u6d41\u7684\u8def\u5f84\u901a\u8fc7\u7eed\u6d41\u4e8c\u6781\u7ba1 D \u5f62\u6210\uff0c\u5982\u7070\u8272\u7bad\u5934\u6240\u793a\uff0c\u4e3a\u8f93\u51fa\u7535\u5bb9 Cout \u5145\u7535\u3002<\/p>\n\n\n\n
\u4ece\u8fd9\u6837\u7684\u7535\u6d41\u8def\u5f84\u53ef\u4ee5\u5f97\u51fa\uff0cBuck-Boost \u7535\u8def\u7684\u8f93\u51fa\u7535\u538b\u76f8\u5bf9\u4e8e\u5730\u662f\u8d1f\u538b\u3002<\/p>\n\n\n\n
\n\n\n\n
\u901a\u8fc7\u4f0f\u79d2\u5e73\u8861\u6765\u5bf9 Buck-Boost \u7535\u8def\u7684\u8f93\u51fa\u7535\u538b\u4e0e\u5360\u7a7a\u6bd4\u5173\u7cfb\u8fdb\u884c\u63a8\u5bfc\u3002\u5047\u8bbe\u4e00\u4e2a\u5468\u671f\u5185\uff0c\u5f00\u5173\u5f00\u542f\u7684\u65f6\u957f\u4e3a DT\uff0c\u5f00\u5173\u5173\u65ad\u7684\u65f6\u957f\u4e3a (1-D)T\uff0c\u4e8c\u6781\u7ba1\u4e0e\u5f00\u5173\u5747\u4e3a\u7406\u60f3\u5668\u4ef6\uff0c\u5219\u6709\uff1a<\/p>\n\n\n\n$$\n\\left\\{\\begin{matrix} \n V_{on}=V_{in} \\\\\n V_{off}=-V_{out}\n\\end{matrix}\\right.\n$$\n\n\n\n$$\n\\begin{align}\n V_{on}\\times DT&=V_{off}\\times (1-D)T \\\\\n V_{in}DT&=-V_{out}(1-D)T \\\\\n V_{out}&=-\\frac{D}{1-D} V_{in}\\\\\n \\frac{V_{out}}{V_{in}} &=-\\frac{D}{1-D}\n\\end{align}\n$$\n\n\n\n
\u4e3a\u4ec0\u4e48 Buck-Boost \u53ef\u4ee5\u5347\u538b\uff1f\u56e0\u4e3a\u7535\u611f\u7684\u7535\u6d41\u65e0\u6cd5\u7a81\u53d8\uff0c\u56e0\u6b64\u5728\u5f00\u5173\u52a8\u4f5c\u65f6\uff0c\u7535\u611f\u4e24\u7aef\u7684\u7535\u538b\u4f1a\u7a81\u53d8\u3002\u540c\u65f6\uff0c\u8fd9\u4e2a\u7a81\u53d8\u7535\u538b\u7684\u5927\u5c0f\u53d6\u51b3\u4e8e\u7535\u611f\u4e2d\u50a8\u5b58\u7684\u80fd\u91cf\u5927\u5c0f\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u5728\u5145\u5165\u8db3\u591f\u7684\u80fd\u91cf\u65f6\uff08D > 0.5\uff09\uff0c\u6839\u636e\u7535\u611f\u7684\u7535\u538b\u516c\u5f0f\uff1a<\/p>\n\n\n\n$$\nU=L\\frac{di}{dt}\n$$\n\n\n\n
\u7535\u611f\u5148\u88ab\u7f13\u6162\u5145\u7535\uff08D \u5185\uff09\uff0c\u518d\u88ab\u5feb\u901f\u653e\u7535\uff081 – D \u5185\uff09\uff0c\u5728\u7535\u611f\u4e24\u7aef\u4ea7\u751f\u7684\u7535\u538b\u5c31\u4f1a\u5927\u4e8e\u8f93\u5165\u7684\u7535\u538b\uff0c\u8fdb\u800c\u5728\u7535\u5bb9\u4e24\u7aef\u4ea7\u751f\u5927\u4e8e Vin \u7684\u7535\u538b\uff0c\u8fbe\u5230\u5347\u538b\u7684\u6548\u679c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u7535\u611f\u578b DC-DC \u7535\u6e90\u62d3\u6251\u7684\u7ec4\u6210\u65e0\u5916\u4e4e\u5f00\u5173\u3001\u7535\u611f\u4e0e\u7535\u5bb9\u7684\u7ec4\u5408\u53d8\u6362\uff0c\u672c\u6587\u8bb0\u5f55\u4e86\u5e38\u89c1\u5e38\u7528\u7684\u7535\u611f\u578b DC-DC \u7535… <\/p>\n
\u9605\u8bfb\u66f4\u591a