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DC-DC Switching Step-Down Regulator, Adjustable, 30V to 550V in, InSOP-24D


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INN3977CQ-TL   Datasheet
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Product Range Selector (InnoSwitch3-AQ Series)

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Product Overview

InnoSwitch™3-AQ family CV/CC QR flyback switcher IC with integrated 750V MOSFET and FluxLink feedback for automotive applications of ICs dramatically simplifies the design and manufacture of flyback power converters, particularly those requiring high efficiency and/or compact size. The InnoSwitch3-AQ family combines primary and secondary controllers and safety-rated feedback into a single IC allowing accurate output voltage regulation even with wide input voltage range of 30VDC to 550VDC. InnoSwitch3-AQ family devices incorporate multiple protection features including line over and undervoltage protection, output overvoltage and overcurrent limiting, and over-temperature shutdown for automotive applications. Devices are available with standard and peak power delivery options, and commonly used auto-restart protection behaviours. Applications includes auxiliary, standby and bias power supplies for automotive used in traction inverter, DC-DC converter and on-board charger.
  • Output power of 10W at 30VDCMIN, 20W at 60VDCMIN and 30W at 400V
  • Highly integrated, compact footprint, EcoSmart™ energy Efficient
  • Up to 90% efficiency across full load range, auto-restart fault response for output OVP
  • Incorporates multi-mode quasi-resonant/CCM flyback controller, 750V MOSFET, secondary-side sensing
  • Integrated FluxLink™, HIPOT-isolated, feedback link, Wide input voltage 30VDC to 550VDC
  • Wide input voltage 30VDC to 921VDC with StackFET, AEC-Q100 qualified
  • Less than 15mW no-load including line sense, easily meets all global energy efficiency regulations
  • Low heat dissipation, reinforced isolation, isolation voltage >4000VAC 100% production HIPOT testing
  • Auto-restart output UV protection with option for peak power delivery
  • UL1577 and TUV (EN60950) safety approved

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Technical Documents (2)

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