{"product_id":"fsdl321","title":"FSDL321","description":"\u003ch2\u003eFSDL321 - Fairchild Power Switch (FPS™) Offline Switching IC\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eFSDL321\u003c\/strong\u003e from onsemi is a high-performance integrated offline switching IC designed for cost-effective flyback power supply applications up to 17W. Part of the proven FPS™ (Fairchild Power Switch) family, this device combines a high-voltage power MOSFET with a current-mode PWM controller in a compact 8-DIP through-hole package.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Design:\u003c\/strong\u003e Built-in 650V high-voltage MOSFET eliminates external switching components\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComprehensive Protection:\u003c\/strong\u003e Current limiting, overload, over-temperature, and over-voltage protection ensure reliable operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolated Topology:\u003c\/strong\u003e Flyback configuration provides output isolation for safety-critical applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Operating Range:\u003c\/strong\u003e 8V to 20V supply voltage with 12V start-up capability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficient Operation:\u003c\/strong\u003e 50kHz switching frequency with 77% maximum duty cycle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Temperature Range:\u003c\/strong\u003e -25°C to +85°C ambient operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Implementation:\u003c\/strong\u003e Standard 8-DIP through-hole package simplifies PCB layout and assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAC\/DC adapters and chargers (up to 17W)\u003c\/li\u003e\n\u003cli\u003eAuxiliary power supplies for industrial equipment\u003c\/li\u003e\n\u003cli\u003eStandby power for consumer electronics\u003c\/li\u003e\n\u003cli\u003eLED driver circuits\u003c\/li\u003e\n\u003cli\u003eSmart home and IoT device power supplies\u003c\/li\u003e\n\u003cli\u003eBattery charging systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Choose FSDL321?\u003c\/h3\u003e\n\u003cp\u003eThe FSDL321 offers exceptional value for low-to-medium power offline switching applications. Its integrated approach reduces component count, simplifies design, and improves reliability compared to discrete solutions. The comprehensive fault protection features make it ideal for applications requiring robust performance in demanding environments.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAuthorized Distribution:\u003c\/strong\u003e We are an authorized distributor of onsemi semiconductor components, providing genuine products with full manufacturer traceability, quality assurance, and technical support. Every FSDL321 IC ships with complete documentation and is backed by our commitment to long lifecycle support.\u003c\/p\u003e\n\n\u003ch3\u003eComplete Technical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ccolgroup\u003e\u003ccol\u003e\u003c\/colgroup\u003e \u003ctbody\u003e \u003ctr\u003e \t\u003ctd\u003eProduct attributes\u003c\/td\u003e \t\u003ctd\u003eProperty Value\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eManufacturer\u003c\/td\u003e \t\u003ctd\u003eonsemi\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eProduct Series\u003c\/td\u003e \t\u003ctd\u003eFPS™\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003ePackaging\u003c\/td\u003e \t\u003ctd\u003e | \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eOutput Isolation\u003c\/td\u003e \t\u003ctd\u003eIsolated\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eInternal Switch(s)\u003c\/td\u003e \t\u003ctd\u003eYes\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eVoltage - Breakdown\u003c\/td\u003e \t\u003ctd\u003e650V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eTopology\u003c\/td\u003e \t\u003ctd\u003eFlyback\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eVoltage - Start Up\u003c\/td\u003e \t\u003ctd\u003e12 V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eVoltage - Supply (Vcc\/Vdd)\u003c\/td\u003e \t\u003ctd\u003e8V ~ 20V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eDuty Cycle\u003c\/td\u003e \t\u003ctd\u003e77%\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eFrequency - Switching\u003c\/td\u003e \t\u003ctd\u003e50kHz\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003ePower (Watts)\u003c\/td\u003e \t\u003ctd\u003e17 W\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eFault Protection\u003c\/td\u003e \t\u003ctd\u003eCurrent Limiting, Over Load, Over Temperature, Over Voltage\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eControl Features\u003c\/td\u003e \t\u003ctd\u003e-\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eOperating Temperature\u003c\/td\u003e \t\u003ctd\u003e-25°C ~ 85°C (TA)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eGrade\u003c\/td\u003e \t\u003ctd\u003e-\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eQualification\u003c\/td\u003e \t\u003ctd\u003e-\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eMounting Type\u003c\/td\u003e \t\u003ctd\u003eThrough Hole\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003ePackage \/ Case\u003c\/td\u003e \t\u003ctd\u003e8-DIP (0.300\", 7.62mm)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \t\u003ctd\u003eSupplier Device Package\u003c\/td\u003e \t\u003ctd\u003e8-DIP\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e   \u003ctd\u003eROHS\u003c\/td\u003e   \u003ctd\u003e\u003cimg class=\"ROSHICON\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0910\/9756\/3425\/files\/ROHSICON.png?v=1761919810\"\u003e\u003c\/td\u003e  \u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003eNeed technical support or design assistance? Our applications engineering team is ready to help you integrate the FSDL321 into your power supply design. Contact us for datasheets, reference designs, and expert guidance.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eRelated Resources \u0026amp; Product Categories\u003c\/h3\u003e\n\u003cp\u003eExplore our comprehensive selection of power management solutions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/hqickey.com\/collections\/ac-dc-converters-offline-switchers\" title=\"AC DC Converters and Offline Switchers - Power Supply ICs\"\u003eAC DC Converters \u0026amp; Offline Switchers\u003c\/a\u003e - Browse our complete range of AC\/DC converter ICs and offline switching regulators for power supply applications\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/hqickey.com\/\" title=\"HQICKEY - Authorized Semiconductor Component Distributor\"\u003eHQICKEY Homepage\u003c\/a\u003e - Discover our full catalog of authorized semiconductor components with guaranteed traceability and quality\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/hqickey.com\/blogs\/news\" title=\"Technical Articles, Application Notes \u0026amp; Industry News\"\u003eTechnical Blog \u0026amp; News\u003c\/a\u003e - Stay updated with the latest application notes, design tips, and semiconductor industry insights\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"onsemi","offers":[{"title":"Default Title","offer_id":51117278331169,"sku":"FSDL321","price":355877.81,"currency_code":"AED","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0910\/9756\/3425\/files\/IC_ACDCCOS_488_MKT-N08F_N_8_d36937a1-a6b3-4a0c-9510-45e1fe2612ec.jpg?v=1743670938","url":"https:\/\/hqickey.com\/de\/products\/fsdl321","provider":"HQICKEY","version":"1.0","type":"link"}