{"id":8800,"date":"2026-06-30T09:04:49","date_gmt":"2026-06-30T09:04:49","guid":{"rendered":"https:\/\/materialparts.com\/ucc28600d\/"},"modified":"2026-06-30T09:04:49","modified_gmt":"2026-06-30T09:04:49","slug":"ucc28600d","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/ucc28600d\/","title":{"rendered":"UCC28600D"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The UCC28600D is a Texas Instruments 8-pin quasi-resonant flyback green-mode controller for AC-DC power conversion. It operates at 40-130kHz switching frequency with valley switching, OVP\/OCP protection, and green-mode burst operation at light loads. Packaged in SOIC-8, -40C to +105C.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n
\u0627\u0644\u0637\u0648\u0628\u0648\u0644\u0648\u062c\u064a\u0627<\/td>\nQuasi-resonant Flyback<\/td>\n<\/tr>\n
Switching Freq<\/td>\n40 kHz to 130 kHz<\/td>\n<\/tr>\n
Max Duty<\/td>\n99%<\/td>\n<\/tr>\n
Start VDD<\/td>\n14.5 V typical<\/td>\n<\/tr>\n
Operation VDD<\/td>\n7V to 16V<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSOIC-8<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Quasi-resonant valley switching<\/li>\n
  • Green-mode burst operation at light load<\/li>\n
  • 40kHz to 130kHz switching frequency<\/li>\n
  • Overvoltage protection (OVP)<\/li>\n
  • Overcurrent protection (OCP)<\/li>\n
  • 99% maximum duty cycle<\/li>\n
  • Internal soft-start<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • AC-DC adapters and chargers<\/li>\n
    • LED lighting power supplies<\/li>\n
    • Consumer electronics SMPS<\/li>\n
    • Standby power supplies<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The UCC28600D is a Texas Instruments 8-pin quasi-resonant flyback green-mode controller for AC-DC power conversion. It operates at 40-130kHz switching frequency with valley switching, OVP\/OCP protection, and green-mode burst operation at light loads. Packaged in SOIC-8, -40C to +105C. Key Specifications Topology Quasi-resonant Flyback Switching Freq 40 kHz to 130 kHz Max Duty […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[31,13],"tags":[],"chip_brand":[138],"class_list":["post-8800","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"QR flyback green-mode controller, 40-130kHz, valley switch, SOIC-8","date_code":"","package_case":"8-Pin SOIC (4.9 x 3.9 x 1.27 mm)","in_stock":6400,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/ucc28600.pdf","price":"$0.85 @ 1ku","product_introduction":"The UCC28600D is a Texas Instruments 8-pin quasi-resonant flyback green-mode controller designed for high-efficiency AC-DC power conversion in adapters, chargers, and LED drivers. The quasi-resonant (QR) valley-switching technique reduces switching losses by turning on the primary MOSFET at the valley of the drain voltage ringing, enabling higher efficiency at full load compared to traditional hard-switched flyback. At light loads, the green-mode burst operation reduces the effective switching frequency to maintain efficiency and meet standby power requirements. The controller operates at 40kHz to 130kHz with up to 99% duty cycle for wide input range applications. Comprehensive protection features include overvoltage (OVP), overcurrent (OCP), and undervoltage lockout (UVLO). Packaged in SOIC-8 rated for -40C to +105C.","working_principle":"The UCC28600 operates in quasi-resonant mode where the primary MOSFET turn-on is synchronized to the valley of the drain-source voltage ringing that occurs after the secondary diode stops conducting. A valley-detection circuit monitors the FB pin to identify the optimal turn-on instant, minimizing turn-on switching losses. The switching frequency varies inversely with load: at full load the frequency is highest (up to 130kHz), and as load decreases the frequency reduces toward 40kHz. Below a light-load threshold, the controller enters green-mode burst operation where switching is periodically enabled and disabled to regulate the output while minimizing average switching losses. The feedback (FB) pin sets the output voltage regulation point via an optocoupler, and the CS pin provides cycle-by-cycle peak current limiting.","pin_description":"
      Pin<\/th>Mnemonic<\/th>Description<\/th><\/tr>
      1<\/td>FB<\/td>Feedback input from optocoupler<\/td><\/tr>
      2<\/td>CS<\/td>Current sense input (OCP)<\/td><\/tr>
      3<\/td>OUT<\/td>Gate drive output to MOSFET<\/td><\/tr>
      4<\/td>GND<\/td>Ground<\/td><\/tr>
      5<\/td>VDD<\/td>Supply voltage (7-16V)<\/td><\/tr>
      6<\/td>OVP<\/td>Overvoltage protection input<\/td><\/tr>
      7<\/td>NC<\/td>No connect<\/td><\/tr>
      8<\/td>NC<\/td>No connect<\/td><\/tr><\/table>","application_scenarios":"
      • 5V\/12V AC-DC wall adapters with valley switching for high full-load efficiency<\/li>\n
      • LED lighting driver power supply with green-mode standby below 100mW<\/li>\n
      • Consumer electronics SMPS with 40-130kHz quasi-resonant operation<\/li>\n
      • Set-top box and monitor standby supply with burst-mode low power<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        UCC28600DR<\/td>TI<\/td>SOIC-8, tape and reel<\/td><\/tr>
        NCP1207<\/td>onsemi<\/td>Similar QR flyback<\/td><\/tr>
        L6565<\/td>ST<\/td>Similar QR controller<\/td><\/tr>
        OB2269<\/td>OnBright<\/td>Similar green-mode<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/8800","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=8800"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/8800\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=8800"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=8800"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=8800"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=8800"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}