{"id":11975,"date":"2021-08-11T04:31:00","date_gmt":"2021-08-10T20:31:00","guid":{"rendered":"http:\/\/222.73.203.234:9999\/?p=11975"},"modified":"2021-11-03T16:18:54","modified_gmt":"2021-11-03T08:18:54","slug":"psfb%e7%94%b5%e8%b7%af%e7%9a%84%e5%9f%ba%e6%9c%ac%e5%b7%a5%e4%bd%9c-2","status":"publish","type":"post","link":"https:\/\/techclass.wfjydl.com\/knowledge\/si\/si_sr\/si_sr02\/9769","title":{"rendered":"PSFB\u7535\u8def\u7684\u57fa\u672c\u5de5\u4f5c"},"content":{"rendered":"<p>PSFB\u7535\u8def\u4e2d\u7684ZVS\u5de5\u4f5c\u6210\u7acb\u6761\u4ef6\u662f\uff1a\u5f53\u7ec4\u6210\u5f00\u5173\u7684MOSFET\u7684\u8f93\u51fa\u7535\u5bb9COSS\u653e\u7535\u4e14\u6b63\u5411\u7535\u6d41\u6d41\u8fc7Body Diode\u65f6\uff0c\u4f7f\u8be5MOSFET\u5bfc\u901a\u3002 \u56fe\u4e2d\u663e\u793a\u4e86PSFB\u7535\u8def\u4e2dQ1\uff5eQ4\u7684\u6f0f\u6781\u7535\u6d41\u6ce2\u5f62\u548c\u6d41\u7ecf\u4e00\u6b21\u4fa7\u53d8\u538b\u5668\u7684\u7535\u6d41\u6ce2\u5f62\u3002<\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" src=\"\/upload\/2021\/08\/Si_AP_2_2_f1.png\" alt=\"Q1\uff5eQ4\u7684\u6f0f\u6781\u7535\u6d41\u548c\u53d8\u538b\u5668\u4e00\u6b21\u4fa7\u6240\u6d41\u7535\u6d41\u7684\u6ce2\u5f62\"><\/p>\n<p>\u5982\u679c\u8bbePSFB\u7535\u8def\u4e2d\u7535\u6d41\u7684\u6b63\u5411\u662f\u6f0f\u6781\u2192\u6e90\u6781\u65b9\u5411\uff0c\u5219\u53ef\u4ee5\u786e\u8ba4Q1\uff5eQ4\u5206\u522b\u5b58\u5728\u6d41\u8fc7\u8d1f\u5411\u6f0f\u6781\u7535\u6d41\u7684\u65f6\u95f4\u6bb5\uff0c\u5373\u6b63\u5411\u7535\u6d41\u6d41\u8fc7MOSFET\u7684Body Diode\u671f\u95f4\u3002\u4f8b\u5982\uff0c\u5728Q3\u4e2d\uff0c\u662fMode(7)\u90e8\u5206\u3002\u7531\u4e8e\u5728\u6b64\u671f\u95f4\u6f0f\u6781\u7535\u538b\u51e0\u4e4e\u4e3a0\uff0c\u56e0\u6b64\u901a\u8fc7\u5728\u6b64\u671f\u95f4\u5bfc\u901a\u6765\u4f7fPSFB\u7535\u8def\u4e2d\u7684ZVS\u5de5\u4f5c\u6210\u7acb\u3002 \u60a8\u8fd8\u53ef\u4ee5\u770b\u5230\uff0c\u8d85\u524d\u81c2\u548c\u6ede\u540e\u81c2\u4e0d\u4f1a\u4ea7\u751f\u5b8c\u5168\u5f02\u76f8\u7684\u76f8\u540c\u5f62\u72b6\u7684\u7535\u6d41\u6ce2\u5f62\u3002\u6ce2\u5f62\u5982\u6b64\u4e0d\u540c\u7684\u539f\u56e0\u53ef\u4ee5\u901a\u8fc7\u8be5\u7535\u6d41\u6ce2\u5f62\u4e0b\u65b9\u6240\u793a\u7684Mode\uff081\uff09\uff5eMode\uff0814\uff09\u7684\u7535\u6d41\u8def\u5f84\u6765\u7406\u89e3\u3002\u6bcf\u79cd\u6a21\u5f0f\u7684\u7f16\u53f7\u548c\u4f4d\u7f6e\u5bf9\u5e94\u4e8e\u4e0a\u9762\u7684\u65f6\u5e8f\u56fe\u3002 Mode\uff081\uff09\uff5eMode\uff0814\uff09\u7684\u5de5\u4f5c\u548c\u7535\u6d41\u8def\u5f84\u5982\u4e0b\uff1a<\/p>\n<table class=\"tbl01\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\"><img decoding=\"async\" src=\"\/upload\/2021\/08\/Si_AP_2_2_f2.png\"><\/td>\n<td>\n<ul class=\"disc-none txt-indent\">\n<li>\u30fbQ1\u548cQ4\u4e3aON\uff0cQ2\u548cQ3\u4e3aOFF\u3002<\/li>\n<li>\u30fb\u5f53Q2\u548cQ3\u4e3aOFF\u65f6\uff0cQ2\u7684\u8f93\u51fa\u7535\u5bb9COSS_Q2\u548cQ3\u7684\u8f93\u51fa\u7535\u5bb9COSS_Q3\u88ab\u5145\u7535\u3002<\/li>\n<li>\u30fbVi\u88ab\u65bd\u52a0\u4e8e\u4e00\u6b21\u4fa7\u53d8\u538b\u5668\u3002<\/li>\n<li>\u30fb\u7535\u6d41\u6d41\u8fc7LS\uff0c\u6240\u4ee5\u80fd\u91cf\u88ab\u79ef\u84c4\u3002<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><img decoding=\"async\" src=\"\/upload\/2021\/08\/Si_AP_2_2_f3.png\"><\/td>\n<td>\n<ul class=\"disc-none txt-indent\">\n<li>\u30fb\u4ec5Q1\u5173\u65ad\uff08OFF\uff09\u3002<\/li>\n<li>\u30fb\u7531\u4e8eQ1\u4e3aOFF\uff0c\u56e0\u6b64\u8f93\u51fa\u7535\u5bb9COSS_Q1\u88ab\u5145\u7535\u3002\u8fd9\u4f7f\u5f97Q2\u6f0f\u6781\u4fa7\u7684\u7535\u4f4d\u4e0b\u964d\uff0c\u540c\u65f6COSS_Q2\u5f00\u59cb\u653e\u7535\u3002<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><img decoding=\"async\" src=\"\/upload\/2021\/08\/Si_AP_2_2_f4.png\"><\/td>\n<td>\n<ul class=\"disc-none txt-indent\">\n<li>\u30fb\u5728COSS_Q1\u7684\u5145\u7535\u548cCOSS_Q2\u7684\u653e\u7535\u5b8c\u6210\u540e\uff0c\u80fd\u91cf\u4ecd\u79ef\u84c4\u5728LS\u4e2d\u7684\u60c5\u51b5\u4e0b\uff0c\u7535\u6d41\u4f1a\u6d41\u8fc7Q2\u7684Body Diode\uff08DQ2\uff09\u5e76\u5f00\u59cb\u7eed\u6d41\u5de5\u4f5c\u3002<\/li>\n<li>\u30fb\u7531\u4e8e\u7eed\u6d41\u5de5\u4f5c\uff0c\u6240\u4ee5\u4e0d\u5411\u4e8c\u6b21\u4fa7\u4f9b\u7ed9\u80fd\u91cf\uff0c\u4f46\u53d7LO\u7684\u5f71\u54cd\uff0c\u7535\u6d41\u4f1a\u7ee7\u7eed\u6d41\u52a8\u3002\u7531\u4e8eLO\u4ea7\u751f\u7684\u7535\u6d41\u5bf9\u4e8eD1\u548cD2\u6765\u8bf4\u662f\u6b63\u5411\u7684\uff0c\u56e0\u6b64\u7535\u6d41\u4f1a\u6d41\u8fc7\u8fd9\u4e24\u4e2a\u4e8c\u6781\u7ba1\u3002<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><img decoding=\"async\" src=\"\/upload\/2021\/08\/Si_AP_2_2_f5.png\"><\/td>\n<td>\n<ul class=\"disc-none txt-indent\">\n<li>\u30fbQ2\u5bfc\u901a\uff08ON\uff09\u3002\u5728\u8fd9\u4e2a\u65f6\u95f4\u70b9DQ2\u662f\u5bfc\u901a\u7684\uff0c\u56e0\u6b64Q2\u7684\u6f0f\u6781-\u6e90\u6781\u95f4\u7535\u538bVDS_Q2\u51e0\u4e4e\u4e3a0V\u3002\u5373ZVS\u5de5\u4f5c\uff0c\u56e0\u6b64\u4e0d\u4ea7\u751f\u5bfc\u901a\u635f\u8017\u3002<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><img decoding=\"async\" src=\"\/upload\/2021\/08\/Si_AP_2_2_f6.png\"><\/td>\n<td>\n<ul class=\"disc-none txt-indent\">\n<li>\u30fbQ4\u5173\u65ad\uff08OFF\uff09\u3002<\/li>\n<li>\u30fb\u7531\u4e8eQ4\u7684\u5173\u65ad\uff0cQ4\u7684\u8f93\u51fa\u7535\u5bb9COSS_Q4\u88ab\u5145\u7535\u3002\u540c\u65f6\uff0c\u7531\u4e8eQ3\u7684\u6e90\u6781\u4fa7\u7535\u4f4d\u4e0a\u5347\uff0c\u8f93\u51fa\u7535\u5bb9COSS_Q3\u653e\u7535\u3002<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><img decoding=\"async\" src=\"\/upload\/2021\/08\/Si_AP_2_2_f7.png\"><\/td>\n<td>\n<ul class=\"disc-none txt-indent\">\n<li>\u30fb\u5728COSS_Q4\u7684\u5145\u7535\u548cCOSS_Q3\u7684\u653e\u7535\u5b8c\u6210\u540e\uff0c\u80fd\u91cf\u4ecd\u79ef\u84c4\u5728LS\u4e2d\u7684\u60c5\u51b5\u4e0b\uff0c\u7535\u6d41\u6d41\u8fc7Q3\u7684Body Diode\uff08DQ3\uff09\u5e76\u5f00\u59cb\u7eed\u6d41\u5de5\u4f5c\u3002<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><img decoding=\"async\" src=\"\/upload\/2021\/08\/Si_AP_2_2_f8.png\"><\/td>\n<td>\n<ul class=\"disc-none txt-indent\">\n<li>\u30fbQ3\u5bfc\u901a\uff08ON\uff09\u3002\u5728\u8fd9\u4e2a\u65f6\u95f4\u70b9DQ3\u662f\u5bfc\u901a\u7684\uff0c\u56e0\u6b64Q3\u7684\u6f0f\u6781-\u6e90\u6781\u95f4\u7535\u538bVDS_Q3\u51e0\u4e4e\u4e3a0V\uff0c\u5373ZVS\u5de5\u4f5c\uff0c\u6545\u4e0d\u4ea7\u751f\u5bfc\u901a\u635f\u8017\u3002<\/li>\n<li>\u30fb\u901a\u8fc7Q3\u7684\u5bfc\u901a\uff0cLS\u8fc5\u901f\u91ca\u653e\u80fd\u91cf\uff0c\u7535\u538b\u4e0eMode\uff081\uff09\uff5eMode\uff086\uff09\u4e2d\u7684IL\u65b9\u5411\u76f8\u53cd\uff0c\u56e0\u6b64\u7535\u6d41\u7684\u65b9\u5411\u8fc5\u901f\u53cd\u8f6c\u3002<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><img decoding=\"async\" src=\"\/upload\/2021\/08\/Si_AP_2_2_f9.png\"><\/td>\n<td>\n<ul class=\"disc-none txt-indent\">\n<li>\u30fbQ2\u548cQ3\u4e3aON\u3001Q1\u548cQ4\u4e3aOFF\u3002<\/li>\n<li>\u30fb\u56e0\u6b64\uff0cCOSS_Q1\u548cCOSS_Q4\u88ab\u5145\u7535\u3002<\/li>\n<li>\u30fbVi\u4ee5\u4e0eMode\uff081\uff09\u76f8\u53cd\u7684\u65b9\u5411\u88ab\u65bd\u52a0\u4e8e\u4e00\u6b21\u4fa7\u53d8\u538b\u5668\u3002<\/li>\n<li>\u30fb\u7535\u6d41\u6d41\u8fc7LS\uff0c\u6240\u4ee5\u80fd\u91cf\u88ab\u79ef\u84c4\u3002<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><img decoding=\"async\" src=\"\/upload\/2021\/08\/Si_AP_2_2_f10.png\"><\/td>\n<td>\n<ul class=\"disc-none txt-indent\">\n<li>\u30fb\u5173\u65adQ2\u3002<\/li>\n<li>\u30fb\u901a\u8fc7\u5173\u65adQ2\uff0cCOSS_Q2\u88ab\u5145\u7535\uff0c\u540c\u65f6COSS_Q1\u653e\u7535\u3002<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><img decoding=\"async\" src=\"\/upload\/2021\/08\/Si_AP_2_2_f11.png\"><\/td>\n<td>\n<ul class=\"disc-none txt-indent\">\n<li>\u30fb\u5728COSS_Q2\u7684\u5145\u7535\u548cCOSS_Q1\u7684\u653e\u7535\u5b8c\u6210\u540e\uff0c\u80fd\u91cf\u4ecd\u79ef\u84c4\u5728LS\u4e2d\u7684\u60c5\u51b5\u4e0b\uff0c\u7535\u6d41\u4f1a\u6d41\u8fc7Q1\u7684Body Diode\uff08DQ1\uff09\u5e76\u5f00\u59cb\u7eed\u6d41\u5de5\u4f5c\u3002<\/li>\n<li>\u30fb\u7531\u4e8e\u7eed\u6d41\u5de5\u4f5c\uff0c\u6240\u4ee5\u4e0d\u5411\u4e8c\u6b21\u4fa7\u4f9b\u7ed9\u80fd\u91cf\uff0c\u4f46\u53d7LO\u7684\u5f71\u54cd\uff0c\u7535\u6d41\u4f1a\u7ee7\u7eed\u6d41\u52a8\u3002\u7531\u4e8eLO\u4ea7\u751f\u7684\u7535\u6d41\u5bf9\u4e8eD1\u548cD2\u6765\u8bf4\u662f\u6b63\u5411\u7684\uff0c\u56e0\u6b64\u7535\u6d41\u4f1a\u6d41\u8fc7\u8fd9\u4e24\u4e2a\u4e8c\u6781\u7ba1\u3002<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><img decoding=\"async\" src=\"\/upload\/2021\/08\/Si_AP_2_2_f12.png\"><\/td>\n<td>\n<ul class=\"disc-none txt-indent\">\n<li>\u30fbQ1\u5bfc\u901a\uff08ON\uff09\u3002\u5728\u8fd9\u4e2a\u65f6\u95f4\u70b9DQ1\u662f\u5bfc\u901a\u7684\uff0c\u56e0\u6b64Q1\u7684\u6f0f\u6781-\u6e90\u6781\u95f4\u7535\u538bVDS_Q1\u51e0\u4e4e\u4e3a0V\uff0c\u5373ZVS\u5de5\u4f5c\uff0c\u6545\u4e0d\u4f1a\u4ea7\u751f\u5bfc\u901a\u635f\u8017\u3002<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><img decoding=\"async\" src=\"\/upload\/2021\/08\/Si_AP_2_2_f13.png\"><\/td>\n<td>\n<ul class=\"disc-none txt-indent\">\n<li>\u30fb\u5173\u65adQ3\u3002<\/li>\n<li>\u30fb\u901a\u8fc7\u5173\u65adQ3\uff0cCOSS_Q3\u88ab\u5145\u7535\uff0c\u540c\u65f6COSS_Q4\u653e\u7535\u3002<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><img decoding=\"async\" src=\"\/upload\/2021\/08\/Si_AP_2_2_f14.png\"><\/td>\n<td>\n<ul class=\"disc-none txt-indent\">\n<li>\u30fb\u5728COSS_Q3\u7684\u5145\u7535\u548cCOSS_Q4\u7684\u653e\u7535\u5b8c\u6210\u540e\uff0c\u80fd\u91cf\u4ecd\u79ef\u84c4\u5728LS\u4e2d\u7684\u60c5\u51b5\u4e0b\uff0c\u7535\u6d41\u6d41\u8fc7Q4\u7684Body Diode\uff08DQ4\uff09\u5e76\u5f00\u59cb\u7eed\u6d41\u5de5\u4f5c\u3002<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><img decoding=\"async\" src=\"\/upload\/2021\/08\/Si_AP_2_2_f15.png\"><\/td>\n<td>\n<ul class=\"disc-none txt-indent\">\n<li>\u30fbQ4\u5bfc\u901a\uff08ON\uff09\u3002\u5728\u8fd9\u4e2a\u65f6\u95f4\u70b9DQ4\u662f\u5bfc\u901a\u7684\uff0c\u56e0\u6b64Q4\u7684\u6f0f\u6781-\u6e90\u6781\u95f4\u7535\u538bVDS_Q4\u51e0\u4e4e\u4e3a0V\uff0c\u5373ZVS\u5de5\u4f5c\uff0c 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