DN05043/D, Universal AC Input, 5 V or 12 V Output, 20 Watt Power Supply Design Note

Reference Design using part NCP1129BP65G by onsemi

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DN05043/D Schematic
5V Efficiency vs. Load Curve
12V Efficiency vs. Load Curve
Image 1 / 3

Manufacturer

onsemi
  • Application Category
    Power Supplies
  • Product Type
    AC to DC Single Output Power Supplies

For End Products

  • Electronic Meter
  • Smart Electric Meter
  • White Goods

Description

  • DN05043/D, Design Note describes a simple 20 watt, universal AC input, constant voltage power supply intended for AC adapters, industrial equipment, or white goods where isolation from the AC mains is required, and low cost, high efficiency, and low standby power are essential. The featured power supply is a simple CCM flyback topology utilizing NCP1129 monolithic switcher with integral 2 ohm, vertical channel MOSFET in a DIP8 package

Key Features

  • Conversion Type
    AC to DC
  • Input Voltage
    85 to 265 (AC) V
  • Output Voltage
    5|12 V
  • Output Current
    1.6@12V|4@5V A
  • Output Power
    20 W
  • Efficiency
    80 %
  • Topology
    Flyback- CCM

Featured Parts (4)

Featured Parts
Part Number Manufacturer Type Description
NCP431ACSNT1G onsemi Voltage References V-Ref Adjustable 2.5V to 36V 100mA 3-Pin SOT-23 T/R Buy
PS2561L-1-F4-A Renesas Electronics Transistor and Photovoltaic Output Photocouplers DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP SMD T/R Buy
NCP431AISNT1G onsemi Voltage References V-Ref Adjustable 2.5V to 36V 100mA 3-Pin SOT-23 T/R Buy
NCP431AVSNT1G onsemi Voltage References V-Ref Adjustable 2.5V to 36V 100mA 3-Pin SOT-23 T/R Buy

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