InnoSwitch3-EP Family Off-Line CV/CC QR Flyback Switcher IC with Integrated Primary Switch, Synchronous Rectification and FluxLink Feedback Product Highlights Highly Integrated, Compact Footprint Very high efficiency across full load range SR FET Incorporates a multi-mode Quasi-Resonant (QR) / CCM flyback controller, high-voltage switch, secondary-side sensing and synchro- nous rectification driver Excellent multi-output cross regulation with weighted secondary-side D V regulation (SSR) feedback and synch FETs InnoSwitch3-EP Optional Integrated FluxLink, HIPOT-isolated, feedback link VOUT Primary Switch Current and Controller Sense Exceptional CV/CC accuracy, independent of external components S BPP IS Secondary Adjustable accurate output current sense using external output sense Control IC resistor PowiGaN technology up to 100 W without heat sinks (INN3678C, PI-8184-072419 INN3679C and INN3670C) Figure 1. Typical Application Schematic. EcoSmart Energy Efficient Less than 30 mW no-load including line sense Easily meets all global energy efficiency regulations Low heat dissipation Figure 2. High Creepage, Safety-Compliant InSOP-24D Package. Advanced Protection / Safety Features Open SR FET-gate detection Output Power Table Fast input line UV/OV protection Auto-restart fault response for output OVP 725 V MOSFET 725 V / 750 V switch rating series for excellent surge withstand 230 VAC 15% 85-265 VAC 3 900 V switch rating series for industrial design or extra safety Product Peak or Peak or margin 1,2 1,2 Open Frame Open Frame Optional Features INN3672C 12 W 10 W Auto-restart output UV protection with option for peak power delivery INN3673C 15 W 12 W Full Safety and Regulatory Compliance INN3674C 25 W 20 W Reinforced isolation INN3675C 30 W 25 W Isolation voltage >4000 VAC INN3676C 40 W 36 W 100% production HIPOT testing UL1577 and TUV (EN60950 and EN62368) safety approved INN3677C 45 W 40 W Excellent noise immunity enables designs that achieve class A 750 V PowiGaN Switch performance criteria for EN61000-4 suite EN61000-4-2, 4-3 230 VAC 15% 85-265 VAC 3 (30 V/m), 4-4, 4-5, 4-6, 4-8 (100 A/m) and 4-9 (1000 A/m) Product Peak or Peak or Green Package 1,2 1,2 Open Frame Open Frame Halogen free and RoHS compliant INN3678C 75 W 65 W Applications INN3679C 85 W 75 W Auxiliary, standby and bias power supplies for appliances, computers INN3670C 100 W 85 W and consumer products 900 V MOSFET Utility meter, smart grid and industrial power supplies 230 VAC 15% 85-265 VAC 3 Product Description Peak or Peak or The InnoSwitch3-EP family of ICs dramatically simplifies the design 1,2 1,2 Open Frame Open Frame and manufacture of flyback power converters, particularly those INN3692C 12 W 10 W requiring high efficiency and/or compact size. The InnoSwitch3-EP INN3694C 25 W 20 W family combines primary and secondary controllers and safety-rated feedback into a single IC. INN3696C 35 W 30 W Table 1. Output Power Table. InnoSwitch3-EP family devices incorporate multiple protection features Notes: including line over and undervoltage protection, output overvoltage 1. Minimum continuous power in a typical non-ventilated enclosed typical size and over-current limiting, and over-temperature shutdown. Devices are adapter measured at 40 C ambient. Max output power is dependent on the available with standard and peak power delivery options, and design. With condition that package temperature must be < 125 C. 2. Minimum peak power capability. commonly used auto-restart protection behaviors. 3. Package: InSOP-24D. www.power.com June 2020 This Product is Covered by Patents and/or Pending Patent Applications. FWD SR GND BPS FBInnoSwitch3-EP DRAIN UNDER/OVER PRIMARY BYPASS (D) INPUT VOLTAGE (V) (BPP) PRIMARY BYPASS REGULATOR ENABLE ENABLE FAULT AUTO-RESTART PRIMARY LINE COUNTER GATE BYPASS PIN BPP/UV INTERFACE RESET UNDERVOLTAGE PRIMARY BPP/UV BYPASS PIN PRIM-CLK CAPACITOR SELECT AND UV/OV V CURRENT SHUNT OSCILLATOR/ V LIMIT ILIM V GATE BP+ TIMERS JITTER t t ON(MAX) OFF(BLOCK) THERMAL GATE SHUTDOWN GATE PRIM/SEC FAULT SecREQ OV/UV BPP From SecPulse SenseFET Secondary PRIM/SEC Power Controller Q S Switch Q R SEC- RECEIVER DRIVER LATCH CONTROLLER BPP/UV t LEB OFF(BLOCK) I S PRIM-CLK ILIM + LATCH-OFF/ PRIMARY OVP AUTO-RESTART LATCH/ V - ILIM AUTO-RESTART t ON(MAX) PI-8044h-111219 SOURCE (S) Figure 3. Primary Controller Block Diagram. FORWARD SYNC RECTIFIER DRIVE (FW) (SR) VOUT SR CONTROL VO REGULATOR FORWARD V BPS INH ENABLE BPS SECONDARY UV VO SR BYPASS (BPS) DETECTOR S Q V BPS(UVLO)(TH) + R Q SR THRESHOLD QR HANDSHAKE/ SECONDARY AUTO-RESTART LATCH/ INH CONTROL AUTO-RESTART DCM FEEDBACK (FB) INH FEEDBACK DRIVER VREF QR CABLE DROP COMPENSATION/ SR FEEDBACK COMPENSATION Ts MAX IS THRESHOLD t OFF(MIN) t OSCILLATOR/ SECINH(MAX) TIMER t SS(RAMP) SECONDARY ISENSE GROUND (IS) (GND) PI-8045l-101619 Figure 4. Secondary Controller Block Diagram. 2 Rev. M 06/20 www.power.com - + - + - + - +