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SC1933C - Off-Line CV/CC QR Flyback Switcher

General Description

SC1933C/SC1936C dramatically simplifies the design and manufacture of flyback power converters, particularly those requiring high efficiency and/or compact size.

SC1933C/SC1936C incorporates primary and secondary controllers and safety-rated feedback into a single IC.

Key Features

  • Open SR FET-gate detection.
  • Fast input line UV/OV protection Full Safety and Regulatory Compliance.
  • Reinforced isolation.
  • Isolation voltage >4000 VAC.
  • 100% production HIPOT testing.
  • UL1577 and TUV (EN60950) safety approved.
  • Excellent noise immunity enables designs that achieve class “A” performance for EN61000-4; EN61000-4-2, 4-3 (30 V/m), 4-4, 4-5, 4-6, 4-8 (100 A/m) and 4-9 (1000 A/m) Green Package.
  • Halogen free and RoHS.

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SC1933C/SC1936C Off-Line CV/CC QR Flyback Switcher IC with Integrated Primary Switch, Synchronous Rectification and FluxLink Feedback Product Highlights Highly Integrated, Compact Footprint • Up to 94% efficiency across full load range • Quasi-Resonant (QR) / CCM flyback controller, high-voltage switch, secondary-side sensing and synchronous rectification driver • Integrated FluxLink™, HIPOT-isolated, feedback link • Easily interfaces to load-directed and fast charge protocol ICs • Constant Power (CP) Profile minimizes charging time with continuous adjustment of output current and voltage • Accurate CV/CC/CP, independent of external components • External IS resistor allows custom CC programming • Instantaneous transient response with 0%-100%-0% load step EcoSmart™ – Energy Efficient • Le