InnoSwitch3-CP Family Off-Line CV/CC QR Flyback Switcher IC with Integrated Primary Switch, Synchronous Rectification, FluxLink Feedback and Constant Power Profile Product Highlights Highly Integrated, Compact Footprint Up to 94% efficiency across f ull load range SR FET 4 Quasi-Resonant (QR) / CCM flyback controller, high-voltage switch , secondary-side sensing and synchronous rectification driver Integrated FluxLink, HIPOT-isolated, feedback link D V Easily interfaces to load-directed and fast charge protocol ICs InnoSwitch3-CP Constant Power (CP) Profile minimizes charging time with continuous VOUT Primary Switch R S and Controller adjustment of output current and voltage S BPP IS Secondary Accurate CV/CC/CP, independent of external components Control IC External IS resistor allows custom CC programming PI-8322-072419 Instantaneous transient response with 0%-100%-0% load step Figure 1. Typical Application Schematic. PowiGaN technology up to 100 W without heat sinks (INN3278C, INN3279C and INN3270C) 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 Secondary switch or diode short-circuit protection Open SR FET-gate detection Fast input line UV/OV protection Optional Features Cable-drop compensation with multiple settings Variable output voltage, constant current profiles VPK Auto-restart or latching fault response for output OVP/UVP Multiple output UV fault thresholds Latching or hysteretic primary over-temperature protection CC set by IS pin resistor (RS) Full Safety and Regulatory Compliance Reinforced isolation Output Current (A) Isolation voltage >4000 VAC Figure 3. Typical Constant Power Characteristics. 100% production HIPOT testing UL1577 and TUV (EN60950 and EN62368) safety approved Output Power Table Excellent noise immunity enables designs that achieve class A performance criteria for EN61000-4 suite EN61000-4-2, 4-3 230 VAC 15% 85-265 VAC 3,4 (30 V/m), 4-4, 4-5, 4-6, 4-8 (100 A/m) and 4-9 (1000 A/m) Product Open Open 1 1 Adapter Adapter 2 2 Frame Frame Green Package INN3264C/3274C 20 W 25 W 15 W 20 W Halogen free and RoHS compliant INN3265C/3275C 25 W 30 W 22 W 25 W Applications High efficiency flyback designs up to 100 W INN3266C/3276C 35 W 40 W 27 W 36 W USB PD / QC / proprietary protocol chargers INN3277C 40 W 45 W 36 W 40 W Description INN3267C 45 W 50 W 40 W 45 W The InnoSwitch3-CP family of ICs dramatically simplifies the design INN3268C 55 W 65 W 50 W 55 W and manufacture of flyback power converters, particularly those INN3278C 70 W 75 W 55 W 65 W requiring high efficiency and/or compact size. The InnoSwitch3-CP family incorporates primary and secondary controllers and safety-rated INN3279C 80 W 85 W 65 W 75 W feedback into a single IC. INN3270C 90 W 100 W 75 W 85 W InnoSwitch3-CP family devices incorporate multiple protection features Table 1. Output Power Table. including line over and undervoltage protection, output overvoltage Notes: 1. Minimum continuous power in a typical non-ventilated enclosed adapter and over-current limiting, and over-temperature shutdown. Devices are measured at 40 C ambient. (package temperature <125 C). available that support the common combinations of latching and 2. Minimum peak power capability. auto-restart behaviors required by applications such as quick charge 3. Package: InSOP-24D. and USB PD designs. The devices are available with and without 4. INN326x 650 V MOSFET, INN3274-77 725 V MOSFET, INN3278 / INN3279 / INN3270 750 V PowiGaN switch. cable-drop compensation. www.power.com June 2020 This Product is Covered by Patents and/or Pending Patent Applications. Output Voltage (V) FWD SR GND BPS FB PI-8321-082317InnoSwitch3-CP 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 4. Primary Controller Block Diagram. FORWARD SYNCRONOUS RECTIFIER DRIVE OUTPUT VOLTAGE (FWD) (SR) (VOUT) SR CONTROL REGULATOR FORWARD V BPS INH ENABLE BPS SECONDARY UV VOUT SR BYPASS (BPS) DETECTOR S Q V BPS(UVLO)(TH) + R Q SR THRESHOLD QR HANDSHAKE/ SECONDARY LATCH-OFF LATCH/ INH CONTROL AUTO-RESART DCM To FEEDBACK Primary (FB) Receiver INH FEEDBACK DRIVER VREF QR CABLE DROP COMPENSATION/ 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-8045j-092019 Figure 5. Secondary Controller Block Diagram. 2 Rev. K 06/20 www.power.com - + - + - + - +