InnoSwitch3-TN Family High Efficiency Off-line CV/CC QR Flyback Switcher IC with Integrated 725 V Primary MOSFET, Synchronous Rectification and Integrated Secondary-Side Control Description Product Highlights The InnoSwitch3-TN family dramatically increases the efficiency of Ideal for Isolated and Non-Isolated Applications auxiliary power supplies used in appliances, consumer products and Flybacks with positive and negative output rails industrial applications. Ideal for both isolated and non-isolated Incorporates a multi-mode Quasi Resonant (QR) / CCM flyback designs, this advanced flyback controller can achieve up to 90% full controller, 725 V primary MOSFET, secondary voltage and current load efficiency, flat efficiency across the load range and very low sensing, SR driver no-load consumption. The InnoSwitch3-TN may be used as an Integrated FluxLink feedback accurate 5 V single-output power supply, with two positive rails or with Compact package reduces PCB area both positive and negative rails. High efficiency across load range Accurate CV/CC independent of transformer design or external The 725 V primary MOSFET, primary and secondary flyback controllers components are coupled using the proprietary FluxLink communications channel. Easily meets 20% regulation limit on 5 V output during zero load to Safety-rated FluxLink communication ensures reliable synchronous full-load transients rectification and accurate output CV and CC. Comprehensive safety features include output over-current protection and over-temperature EcoSmart Energy Efficient protection. The small MinSOP package and a low number of external Less than 5 mW no-load at 230 VAC components make the InnoSwitch3-TN ICs ideal for compact designs. Enables designs that easily meet global energy efficiency regulations Achieves up to 90% full load efficiency Advanced Protection / Safety Features Integrated output OVP Open-gate detection for SR FET Hysteretic thermal shutdown Overload power limited <15 W (5 V and <3 A) Using accurate internal CC (constant-current) limit Figure 2. Compact MinSOP-16A M Package. Full Safety and Regulatory Compliance Maximum Output Power Table Reinforced insulation with isolation voltage >4000 VAC 100% production Hipot testing 230 VAC 85-265 VAC 4 UL1577, TUV (EN62368-1), CQC (GB4943.1) safety approved. Product 1,2,3 1,2,3 Open Frame Open Frame VDE 0884-17 (EN60747-17) pending approval Enables designs that have class A performance criteria for INN3072M 12 W 10 W EN61000-4 suite of test standards, including EN61000-4-2, 4-3 INN3073M 15 W 12 W (30 V/m), 4-4, 4-5, 4-6, 4-8 (100 A/m) and 4-9 (1000 A/m) INN3074M 21 W 16 W Green Package Table 1. Output Power Table. Halogen free and RoHS compliant Notes: 1. Minimum peak power capability. Applications 2. Max output power is dependent on the design. Limit package temperature to Auxiliary supplies in appliances and industrial systems <125 C. 3. Assumes internal output current sensing is disabled (IS-GND pins shorted) 4. Package: MinSOP-16A. Positive and Negative Output Dual Positive Output Single Output +V 2 OUT +V 2 OUT +5 V +5 V RTN SR FET RTN SR FET -5 V SR FET Isolated and RTN Non-Isolated D D D InnoSwitch3-TN InnoSwitch3-TN InnoSwitch3-TN VOUT VOUT Primary FET Primary FET VOUT Primary FET and Controller and Controller and Controller S BPP S BPP Secondary Secondary S BPP Secondary Control IC Control IC Control IC PI-8228k-072821 PI-9338b-082421 PI-9337b-082421 Figure 1. Power Supply Configuration Examples using InnoSwitch3-TN. www.power.com November 2021 This Product is Covered by Patents and/or Pending Patent Applications. FWD SR GND BPS IS FWD SR GND BPS IS FWD SR GND BPS ISInnoSwitch3-TN DRAIN PRIMARY BYPASS (D) (BPP) PRIMARY BYPASS REGULATOR From Secondary Controller RECEIVER CONTROL LOGIC CONTROLLER FluxLink THERMAL SHUTDOWN BPP SenseFET Power Switch DRIVER SOURCE PI-8492c-091021 (S) Figure 3. Primary Controller Block Diagram. SECONDARY SYNC RECTIFIER DRIVE BYPASS FORWARD (SR) (BPS) (FWD) VOUT REGULATOR 4.4 V VOUT DETECTOR VOUT QR COMP HANDSHAKE/ AUTO-RESTART INH CONTROL COMP To Primary (FLuxlink) INH FEEDBACK IS DRIVER QR VREF GND Ts MAX t OFF(MIN) OSCILLATOR/ t SECINH(MAX) TIMER IREF GND IS PI-9298a-091021 Figure 4. Secondary Controller Block Diagram. 2 Rev. C 11/21 www.power.com - + - +