InnoSwitch3-EP Family Off-Line CV/CC QR Flyback Switcher IC with Integrated 725 V MOSFET, Synchronous Rectification and FluxLink Feedback. For Applications up to 45 W Product Highlights Highly Integrated, Compact Footprint Up to 94% efficiency across full load range SR FET Incorporates a multi-mode Quasi-Resonant (QR) / CCM flyback controller, 725 V MOSFET, secondary-side sensing and synchronous rectification driver Excellent multi-output cross regulation with weighted secondary-side regulation (SSR) feedback and synch FETs Integrated FluxLink, HIPOT-isolated, feedback link D V InnoSwitch3-EP Exceptional CV/CC accuracy, independent of external components Optional VOUT Adjustable accurate output current sense using external output sense Primary FET Current and Controller Sense resistor S BPP IS Secondary EcoSmart Energy Efficient Control IC Less than 15 mW no-load including line sense Easily meets all global energy efficiency regulations Low heat dissipation PI-8184-050217 Figure 1. Typical Application Schematic. Advanced Protection / Safety Features Secondary MOSFET or diode short-circuit protection Open SR FET-gate detection Fast input line UV/OV protection Auto-restart fault response for output OVP Optional Features Auto-restart output UV protection with option for peak power delivery Full Safety and Regulatory Compliance Figure 2. High Creepage, Safety-Compliant InSOP-24D Package. Reinforced isolation Isolation voltage >4000 VAC 100% production HIPOT testing UL1577 and TUV (EN60950) safety approved Output Power Table Excellent noise immunity enables designs that achieve class A 230 VAC 15% 85-265 VAC performance criteria for EN61000-4 suite EN61000-4-2, 4-3 3 Product (30 V/m), 4-4, 4-5, 4-6, 4-8 (100 A/m) and 4-9 (1000 A/m) Peak or Peak or 1,2 1,2 Open Frame Open Frame Green Package INN3672C 12 W 10 W Halogen free and RoHS compliant INN3673C 15 W 12 W Applications INN3674C 25 W 20 W Auxiliary, standby and bias power supplies for appliances, computers and consumer products INN3675C 30 W 25 W Utility meter, smart grid and industrial power supplies INN3676C 40 W 36 W Description INN3677C 45 W 40 W The InnoSwitch3-EP family of ICs dramatically simplifies the design Table 1. Output Power Table. and manufacture of flyback power converters, particularly those Notes: requiring high efficiency and/or compact size. The InnoSwitch3-EP 1. Minimum continuous power in a typical non-ventilated enclosed typical size family combines primary and secondary controllers and safety-rated adapter measured at 40 C ambient. Max output power is dependent on the design. With condition that package temperature must be < 125 C. feedback into a single IC. 2. Minimum peak power capability. InnoSwitch3-EP family devices incorporate multiple protection features 3. Package: InSOP-24D. including line over and undervoltage protection, output overvoltage and over-current limiting, and over-temperature shutdown. Devices are available with standard and peak power delivery options, and commonly used auto-restart protection behaviors. www.power.com August 2018 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 CURRENT V SHUNT OSCILLATOR/ LIMIT V V ILIM BP+ GATE TIMERS JITTER t t ON(MAX) OFF(BLOCK) GATE THERMAL SHUTDOWN GATE PRIM/SEC FAULT SecREQ OV/UV BPP From LATCH-OFF SecPulse Secondary SenseFET PRIM/SEC Controller Power Q S MOSFET Q R RECEIVER SEC- DRIVER CONTROLLER LATCH BPP/UV t LEB OFF(BLOCK) I S PRIM-CLK ILIM + LATCH-OFF PRIMARY OVP V - ILIM LATCH t ON(MAX) PI-8044-083017 SOURCE (S) Figure 3. Primary Controller Block Diagram. FORWARD SYNCRONOUS RECTIFIER DRIVE OUTPUT VOLTAGE (FWD) (SR) (VOUT) SR CONTROL REGULATOR FORWARD 4.4 V INH ENABLE BPS SECONDARY UV VOUT SR BYPASS (BPS) DETECTOR 4.4 V S Q 3.9 V + R Q SR THRESHOLD QR HANDSHAKE/ SECONDARY LATCH-OFF LATCH INH CONTROL DCM To FEEDBACK Primary (FB) Receiver INH FEEDBACK DRIVER VREF QR FEEDBACK COMPENSATION Ts MAX V PK CONSTANT t OFF(MIN) POWER t SECINH(MAX) OSCILLATOR/ IS THRESHOLD TIMER t SS(RAMP) SECONDARY ISENSE GROUND (IS) (GND) PI-8045d-091217 Figure 4. Secondary Controller Block Diagram. 2 Rev. D 08/18 www.power.com - + - + - + - +