Power Integration

Demoboard DER-659

30 W Supply For Wall Outlet Using InnoSwitch3TM-CP

Topologie: Flyback
Eingangsspannung (min.): 180.00 V
Eingangsspannung (max.): 265.00 V
Ausgang 1: 9.20 V / 3.300 A

Erstveröffentlichung am 29.05.2018, Version 1.1


This engineering report describes an output power supply intended for a USB wall outlet charger. The 30 W output (selectable 5.1 V / 6 A or 9.2 V / 3.3 A or 15.3 V / 2 A) rail is designed for a high power USB charging with Type-A or Type-C ports. The output utilizes INN3268C from the InnoSwitch3-CP family of ICs. This design shows high power density and efficiency that is possible due to the high level of integration of the InnoSwitch3-CP controller providing exceptional performance. DER-659 is a high-line input flyback converter design. The key design goals were high power density, high efficiency, low no load consumption, and best in class thermal performance. This is intended for wall outlet USB chargers.


  • 30W compact power supply for high power USB type A/C port charging.
  • >89% average efficiency at nominal AC input
  • <30 mW no-load input power
  • All the benefits of secondary-side control with the simplicity of primary-side regulation
  • Insensitive to transformer variation
  • Extremely fast transient response independent of load timing
  • Synchronous rectification for higher efficiency
  • Accurate thermal protection with hysteretic shutdown
  • Input voltage monitor with accurate brown-in/brown-out and overvoltage protection
  • Meets IEC 2.0 kV common mode surge, 1.0 kV differential surge and EN55022 conducted EMI


  Artikel Nr. SPEC Produktserie C
(V (AC))
DF @ 1 kHz
DF @ 10 kHz
DF @ 100 kHz
Betriebstemperatur L
Technische Artikelnummer Muster
890324023025CS PDF WCAP-FTX2 Folienkondensatoren 150 275 30000 0.1 0.2 2 300 -40 °C up to +105 °C 13 7 12 MX2P010154K275ACPP45004

Weitere Anwendungen und Artikel von Würth Elektronik zu diesem IC

  • INN3268C-H202
    Topologie: Flyback, Eingangsspannung (min.): 180.00 V, Eingangsspannung (max.): 265.00 V, Ausgang 1: 5.10 V / 6.000 A
  • INN3268C-H202
    Topologie: Flyback, Eingangsspannung (min.): 180.00 V, Eingangsspannung (max.): 265.00 V, Ausgang 1: 15.30 V / 2.000 A