{"id":2548,"date":"2026-05-23T06:10:53","date_gmt":"2026-05-23T06:10:53","guid":{"rendered":"https:\/\/materialparts.com\/fan6248hcmx\/"},"modified":"2026-05-23T07:05:43","modified_gmt":"2026-05-23T07:05:43","slug":"fan6248hcmx","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/fan6248hcmx\/","title":{"rendered":"FAN6248HCMX"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The FAN6248HCMX from onsemi is an advanced synchronous rectifier (SR) controller designed for LLC resonant converters. Packaged in a 16-SOIC, it features adaptive virtual turn-off threshold and predictive gate drive timing for high-efficiency secondary-side rectification.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
\u62d3\u6251\u7ed3\u6784<\/td>\nLLC Resonant SR Controller<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n4.5V ~ 35V<\/td>\n<\/tr>\n
Operating Frequency<\/td>\nUp to 500kHz<\/td>\n<\/tr>\n
\u6805\u6781\u9a71\u52a8\u8f93\u51fa<\/td>\n4A source \/ 6A sink<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C ~ 125\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n16-SOIC<\/td>\n<\/tr>\n
\u7279\u70b9<\/td>\nAdaptive virtual turn-off threshold<\/td>\n<\/tr>\n
Version<\/td>\nHCMX (High-Side \/ Common-Mode)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Adaptive virtual turn-off threshold with 16-step offset modulation<\/li>\n
  • Predictive gate drive timing for minimum body diode conduction<\/li>\n
  • Dead-time optimization for LLC converters<\/li>\n
  • VDR drain sensing for accurate SR timing<\/li>\n
  • Supports both high-side and low-side SR configurations<\/li>\n
  • Under-voltage lockout and thermal shutdown<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • LLC resonant converter synchronous rectification<\/li>\n
    • Server and telecom AC-DC power supplies<\/li>\n
    • High-efficiency adapter and charger designs<\/li>\n
    • TV and monitor power supplies<\/li>\n
    • Industrial power conversion<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The FAN6248HCMX from onsemi is an advanced synchronous rectifier (SR) controller designed for LLC resonant converters. Packaged in a 16-SOIC, it features adaptive virtual turn-off threshold and predictive gate drive timing for high-efficiency secondary-side rectification. Key Specifications Topology LLC Resonant SR Controller Supply Voltage 4.5V ~ 35V Operating Frequency Up to 500kHz Gate […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[36,13],"tags":[],"chip_brand":[144],"class_list":["post-2548","post","type-post","status-publish","format-standard","hentry","category-gate-driver-ics","category-integrated-circuits-ics","chip_brand-on"],"acf":{"brief_explanation":"Advanced SR controller for LLC, adaptive turn-off, 16-SOIC, up to 500kHz","date_code":"","package_case":"16-SOIC (10.3 x 7.5 x 2.65 mm)","in_stock":4780,"datasheet":"https:\/\/www.onsemi.com\/products\/power-management\/synchronous-rectifier-controllers\/fan6248","price":"","product_introduction":"The FAN6248HCMX from onsemi is a highly integrated synchronous rectifier controller optimized for LLC resonant converter secondary-side rectification. It uses an adaptive virtual turn-off threshold scheme with a 16-step offset voltage modulation to precisely time the SR MOSFET turn-off, minimizing body diode conduction time and maximizing efficiency. The controller supports both high-side and common-mode SR MOSFET configurations. Its predictive gate drive capability anticipates the zero-crossing point of the SR current, enabling near-ideal diode emulation in the variable-frequency LLC operating regime.","working_principle":"The FAN6248 monitors the drain-source voltage (VDR) of the SR MOSFET to detect current direction. When the secondary-side current begins flowing through the body diode (VDR negative), the controller turns on the SR MOSFET. The turn-off timing is determined by the adaptive virtual turn-off threshold: a 16-step offset voltage is modulated to compensate for parasitic inductance and MOSFET RDS(on) variations. If the dead time between SR turn-off and primary switch turn-on exceeds 200ns, the offset decreases by one step in the next cycle, reducing the dead time. This closed-loop adaptation ensures optimal SR timing across load and line conditions.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>VDD<\/td>Power<\/td>Supply voltage (4.5-35V)<\/td><\/tr>
      2<\/td>NC<\/td>-<\/td>No connect<\/td><\/tr>
      3<\/td>EN<\/td>Input<\/td>Enable input<\/td><\/tr>
      4<\/td>VDR<\/td>Input<\/td>Drain voltage sensing<\/td><\/tr>
      5<\/td>CS<\/td>Input<\/td>Current sense input<\/td><\/tr>
      6<\/td>AGND<\/td>Power<\/td>Analog ground<\/td><\/tr>
      7<\/td>NC<\/td>-<\/td>No connect<\/td><\/tr>
      8<\/td>PGND<\/td>Power<\/td>Power ground<\/td><\/tr>
      9<\/td>GATE<\/td>Output<\/td>Gate drive output<\/td><\/tr>
      10<\/td>VCC<\/td>Power<\/td>Internal supply bypass<\/td><\/tr>
      11-16<\/td>NC\/PGND<\/td>-<\/td>No connect \/ Power ground<\/td><\/tr><\/table>","application_scenarios":"
      • LLC resonant converter secondary-side synchronous rectification<\/li>
      • 80Plus Titanium server power supply SR stages<\/li>
      • High-density AC-DC adapter and charger platforms<\/li>
      • TV and LED display power supply SR control<\/li>
      • Industrial DC-DC converter output rectification<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        onsemi<\/td>FAN6248HLMX<\/td>16-SOIC<\/td>Low-side SR version<\/td><\/tr>
        onsemi<\/td>NCP4305DR2G<\/td>8-SOIC<\/td>SR controller, simpler<\/td><\/tr>
        TI<\/td>UCC24610<\/td>8-VSSOP<\/td>SR controller for LLC<\/td><\/tr>
        Infineon<\/td>XDPS2221<\/td>PG-DSO-8<\/td>SR controller, LLC optimized<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2548","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=2548"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2548\/revisions"}],"predecessor-version":[{"id":2569,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2548\/revisions\/2569"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2548"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2548"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2548"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2548"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}