{"id":6398,"date":"2026-06-16T02:45:46","date_gmt":"2026-06-16T02:45:46","guid":{"rendered":"https:\/\/materialparts.com\/ka5l0380rydtu\/"},"modified":"2026-06-16T02:45:46","modified_gmt":"2026-06-16T02:45:46","slug":"ka5l0380rydtu","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/ka5l0380rydtu\/","title":{"rendered":"KA5L0380RYDTU"},"content":{"rendered":"

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

The KA5L0380RYDTU is a Fairchild Power Switch (FPS) that integrates a PWM controller and an 800V SenseFET in a single TO-220F-4 package. Designed for off-line SMPS applications such as LCD monitors, adapters, and industrial power supplies, it operates at a fixed 50kHz switching frequency with comprehensive protection features.<\/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\n\n\n\n
MOSFET Breakdown Voltage<\/td>\n800V<\/td>\n<\/tr>\n
Oscillator Frequency<\/td>\n50kHz (typical)<\/td>\n<\/tr>\n
Start Threshold Voltage<\/td>\n15V (typical)<\/td>\n<\/tr>\n
Stop Threshold Voltage<\/td>\n9V (typical)<\/td>\n<\/tr>\n
Maximum Duty Cycle<\/td>\n77%<\/td>\n<\/tr>\n
Peak Current Limit<\/td>\n2.15A (typical)<\/td>\n<\/tr>\n
Vcc Operating Range<\/td>\n9V to 30V<\/td>\n<\/tr>\n
\u0627\u0644\u0637\u0648\u0628\u0648\u0644\u0648\u062c\u064a\u0627<\/td>\nFlyback, Forward<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629 \u0625\u0644\u0649 +85 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nTO-220F-4<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Integrated PWM controller and 800V avalanche-rugged SenseFET<\/li>\n
  • Precision fixed 50kHz operating frequency<\/li>\n
  • Pulse-by-pulse current limiting<\/li>\n
  • Overvoltage protection (min 25V on Vcc)<\/li>\n
  • Overcurrent protection with auto-restart<\/li>\n
  • Internal thermal shutdown<\/li>\n
  • Undervoltage lockout (UVLO)<\/li>\n
  • Soft start function<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • LCD monitor power supplies<\/li>\n
    • SMPS adapters and chargers<\/li>\n
    • Industrial auxiliary power supplies<\/li>\n
    • Set-top box power supplies<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The KA5L0380RYDTU is a Fairchild Power Switch (FPS) that integrates a PWM controller and an 800V SenseFET in a single TO-220F-4 package. Designed for off-line SMPS applications such as LCD monitors, adapters, and industrial power supplies, it operates at a fixed 50kHz switching frequency with comprehensive protection features. Key Specifications MOSFET Breakdown Voltage […]<\/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":[13,29],"tags":[],"chip_brand":[144],"class_list":["post-6398","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-on"],"acf":{"brief_explanation":"Fairchild Power Switch (FPS), 800V SenseFET, 50kHz, 2.15A peak, TO-220F-4","date_code":"","package_case":"TO-220F-4 (10.4 x 9.3 x 4.6 mm)","in_stock":4500,"datasheet":"https:\/\/html.datasheetq.com\/pdf-html\/719427\/Fairchild\/6page\/5L0380R.html","price":"$0.85 @ 1ku","product_introduction":"The KA5L0380RYDTU is a member of the Fairchild KA5X03XX series of Power Switches that combine a pulse width modulation controller and an 800V avalanche-rugged SenseFET into a single TO-220F-4 package. This integration minimizes external component count and simplifies off-line SMPS design. The device operates at a fixed 50kHz switching frequency and features under-voltage lockout (UVLO), over-voltage protection (OVP), over-current protection (OCP), and internal thermal shutdown. The start-up current is typically 100\u00b5A, reducing start-up resistor power dissipation. The device enters auto-restart mode during fault conditions, providing robust protection for the power supply and load.","working_principle":"The KA5L0380RYDTU uses a current-mode PWM control architecture. The internal oscillator generates a fixed 50kHz clock that sets the switching frequency. The FB pin receives feedback current from an optocoupler on the secondary side, which controls the duty cycle of the integrated SenseFET. The peak drain current is limited on a pulse-by-pulse basis through an internal current sense comparator with a threshold of approximately 200mV. When Vcc drops below the UVLO stop threshold (9V), the device stops switching. When Vcc exceeds the OVP threshold (minimum 25V), the device enters auto-restart mode. Internal thermal shutdown activates when the junction temperature exceeds approximately 160\u00b0C, disabling switching until the temperature drops to a safe level.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>
      1<\/td>GND<\/td>Ground<\/td>Ground reference for control circuitry and SenseFET source<\/td><\/tr>
      2<\/td>Vcc<\/td>Power<\/td>Supply voltage for control circuits; charged through start-up resistor<\/td><\/tr>
      3<\/td>FB<\/td>Input<\/td>Feedback input from optocoupler; controls PWM duty cycle<\/td><\/tr>
      4<\/td>Drain<\/td>Power<\/td>High-voltage SenseFET drain; connects to transformer primary<\/td><\/tr><\/table>","application_scenarios":"
      • LCD Monitor Power:<\/b> Provides complete offline flyback converter for LCD displays up to 40W with integrated 800V MOSFET handling universal input voltage range<\/li>
      • Adapter\/Charger SMPS:<\/b> Powers laptop and mobile device chargers with auto-restart fault protection and soft start for reliable field operation<\/li>
      • Industrial Auxiliary Supply:<\/b> Delivers isolated low-voltage rails for sensors and controllers in factory environments with comprehensive OVP and thermal protection<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>VDS<\/th>fsw<\/th>Key Difference<\/th><\/tr>
        KA5H0380R<\/td>Fairchild<\/td>800V<\/td>100kHz<\/td>Higher frequency variant<\/td><\/tr>
        KA5M0380R<\/td>Fairchild<\/td>800V<\/td>67kHz<\/td>Medium frequency variant<\/td><\/tr>
        VIPER22ADIP-E<\/td>ST<\/td>730V<\/td>60kHz<\/td>Lower voltage, DIP-8 package<\/td><\/tr>
        TOP224P<\/td>Power Integrations<\/td>700V<\/td>65kHz<\/td>Similar topology, different pinout<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6398","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=6398"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6398\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=6398"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=6398"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=6398"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=6398"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}