InnoSwitch3-MX Family Off-Line Multiple Output QR Flyback Switcher IC with Integrated 650 V, 725 V or 750 V Switch, Synchronous Recticfi ation and FluxLink Feedback VLED Product Highlights Based on InnoSwitch3 High efficiency across full load range VOUT2 Incorporates a multi-mode Quasi-Resonant (QR) / CCM flyback controller, 650 V, 725 V or 750 V switch, secondary-side sensing and synchronous rectification driver PowiGaN technology up to 85 W without heat sink VOUT1 (INN3478C, INN3479C and INN3470C) Integrated FluxLink, HIPOT-isolated, feedback link RTN Instantaneous transient response 5% CV with 0%-100%-0% load step VCV1 Partner IC to InnoMux EcoSmart Energy Efficient BPS Easily meets all global energy efficiency regulations Low heat dissipation D V SR InnoSwitch3-MX FWC Interface Advanced Protection / Safety Features Primary FET REQ with Primary sensed output OVP and Controller InnoMux ACK Open SR FET gate detection S BPP Secondary Hysteretic thermal shutdown Control IC Input voltage monitor with accurate brown-in/brown-out and PI-8368c-030920 overvoltage protection Figure 1. Typical Application/Performance. Full Safety and Regulatory Compliance Reinforced insulation Isolation voltage >4000 VAC 100% production HIPOT compliance testing UL1577 and TUV (EN60950) safety approved Enables designs that have A performance criteria for EN61000-4 suite of test standards, including EN61000-4-2, 4-3 (30 V/m), 4-4, Figure 2. High Creepage, Safety-Compliant InSOP-24D Package. 4-5, 4-6, 4-8 (100 A/m) and 4-9 (1000 A/m) Wave Solder or Reflow Process. Green Package Halogen free and RoHS compliant Output Power Table Applications 85-265 VAC BV Use with InnoMux for Energy Star 8, CEC, and 2021/2023 EU 3 Product Nominal Max Rating labeling for monitors and TVs 1 2 Continuous Continuous Description INN3464C 650 V 18 W 23 W INN34x5C 650 / 725 V 22 W 28 W The InnoSwitch3-MX together with InnoMux dramatically improves system efficiency by eliminating the boost and buck converter stages. INN34x6C 650 / 725 V 28 W 35 W It also simplifies the development and manufacturing of multiple output INN34x7C 650 / 725 V 35 W 44 W power supplies, particularly those in compact enclosures or with high INN3468C 650 V 40 W 50 W efficiency requirements. The InnoSwitch3-MX architecture is revolu - INN3478C 750 V 55 W 65 W tionary in that the devices incorporate both primary and secondary controllers, with sense elements and a safety-rated feedback mecha- INN3479C 750 V 65 W 75 W nism into a single IC. INN3470C 750 V 75 W 85 W Close component proximity and innovative use of the integrated Table 1. Output Power Table. communication link, FluxLink, permit accurate control of a secondary- Notes: side synchronous rectification MOSFET with Quasi-Resonant switching 1. Continuous power using nominal primary current limit in a typical open frame of primary integrated high-voltage switch to maintain high efficiency application at +50 C ambient with adequate PCB thermal design to ensure package temperature <125 C. across the entire load range. 2. Continuous power using maximum primary current limit in a typical open frame application at +50 C ambient with adequate heat sinking to ensure This version of InnoSwitch3 is intended to be used with InnoMux for package temperature <125 C. multiple output, single-stage power supplies for monitors and TVs. 3. Package: InSOP-24D. This enables very high system efficiency on a small PCB foot print. www.power.com March 2020 This Product is Covered by Patents and/or Pending Patent Applications. FW SR GND VOUT BPSInnoSwitch3-MX VCV2 VLED (CV/CC) Up to VCV1 4 LED String FB FB FB V1 V2 LED D CONTROL PWM Primary FET Secondary Multi-Output / LED Controller ADIM/LPF and Controller Controller STB S GND InnoSwitch3-MX InnoMux PI-8364c-030320 Figure 3. Simplified Schematic for Monitor / TV Application. 2 Rev. D 03/20 www.power.com FW SR GDR1 GDR2 ICC1 ICC2 ICC3 ICC4