DatasheetGeneral Description SF1539HT is a high performance, high efficiency, highly integrated current mode PWM power switch for offline flyback converter applications. In SF1539HT, PWM switching frequency with shuffling is fixed to 65KHz and is trimmed to tight range. When the output power demands decrease, he IC decreases switching frequency based on the proprietaryη -BalanceTM control to boost power conversion efficiency at the light load. When output power falls below a given value, the IC enters into burst mode and provides excellent efficiency without audio noise. The IC can achieve "Zero OCP/OPP Recovery Gap" using SiFirst's proprietary control algorithm. Meanwhile, the OCP/OPP variation versus universal line input is compensated. The IC has built-in synchronized slope compensation to prevent sub-harmonic oscillation at high PWM duty output. The IC also has built-in soft start function to soften the stress on the MOSFET during power on period. SF1539HT integrates functions and protections of Under Voltage Lockout (UVLO), Over Temperature Protection (OTP), VCC Over Voltage Protection (OVP), Cycle-by-cycle Current Limiting (OCP), Pins Floating Protection, Over Load Protection (OLP), VCC Clamping, Leading Edge Blanking (LEB), etc.SF1539HT is available in DIP8 packages. Features Built-in 600V Power MOSFET Over Temperature Protection (OTP) Proprietary η -BalanceTM Control to Boost Light Load Efficiency Proprietary "Zero OCP/OPP Recovery Gap Control Fixed 65KHz Switching Frequency Built-in Soft Start Function Very Low Startup Current Frequency Reduction and Burst Mode Control for Energy Saving Current Mode Control Built-in Frequency Shuffling Built-in Synchronous Slope Compensation Cycle-by-Cycle Current Limiting Built-in Leading Edge Blanking (LEB) Constant Power Limiting Pins Floating Protection Audio Noise Free Operation VDD OVP & Clamp VDD Under Voltage Lockout (UVLO)Applications Offline AC/DC Flyback Converter for AC/DC Adaptors Open-frame SMPS Set-Top Box Power Supplies ATX Standby Power Package/Order Information Typical CircuitWhy choose us?* Specilaze in IC for around 14 years * 100% Tested before sale * Cooperate with over 35 famous brands from domestic and international market * Competitive and reasonable price * Abundant inventory and short lead time * 24hrs supports from our sales and R&D team Warranty1 YearLead time3-7 DaysNotes1.The pictures are taken by camera. 2.You can contact us for a better price. 3.Feel free to contact us if you would like to see other models. Our company /* January 22, 2024 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1
Related products about SF1539HT Balance TM PWM Power Switch Fixed 65kHz Fsw IC
-
Waste Tyre Plastic Recycling Machinery Machine Tire Crusher Production Line Rubber Crumb Grinding Machine Equipment Tire Shredder
-
Stretch Plastic Blowing Pet Bottle Making Blow Molding Machine Bottles Stretch Automatic Pet Bottle Blowing Machine
-
Waste Plastic Pet Bottle, Water Bottle Flake, PP/HDPE/LDPE PE Film Jumbo Woven Bags Plastic Crusher Machine, Plastic Crushing Washing Recycling Machine
-
Type 2 Wall-Mounted Electric Car Charging Station 7kw /11 Kwelectric Vehicle Charging Station Home Wallbox AC EV Charger Single Phase or 3three Phase
-
G-View G12W Wholesale Auto Car LED Headlight Bulb High Power H13 H11 9005 H7 H4 Car LED Headlights LED Car Lights
-
New Design Porcelain Round Plates Dinner Set for Wedding and Banquet
-
China 2023 New Design Super Soft 100% Polyester Microfiber Knitted Oversized Decoration Hoodie Blanket
-
Handmade Art Creative Materials Thickened White Paper Cup DIY Disposable Handmade Colored Paper Cup