Active-clamp Flyback Transformer with High Power Density for Texas Instruments USB-PD 2.0 Application

High Switching Frequency, 92% efficiency, 65W USB Type-C PD AC/DC Adapter Reference Design

Characteristics

  • Low leakage inductance
  • Low DC resistance
  • High power density
  • RM8 package
  • THT mount
  • Reinforced insulation
  • Universal offline input
  • Isolation voltage: 3750VAC
  • Operating temp: -40°C to 125°C
  • Lead free and RoHS compliant
  • Designed to meet IEC60950-1, EN60950-1, UL60950-1
  • Operating temp: -40°C to 125°C

Applications

  • USB PD2.0
  • Smart phones
  • Laptops
Electrical Properties
Order Code Ui (VAC) U01 (V) I01 (A) UAUX (V) L (µH) NP:NS : NAUX fswitch (kHz) UT (VAC) L (mm) W (mm) H (mm)
750343803 85-265 20 3.25 70 75 5.5 : 1 : 3 450 3750 21.59 21.59 17.27

Reference Design Characteristics

  • High efficiency
  • High power density
  • Low light load input power
  • Univeral 85-265VAC input voltage range
  • Active-clamp flyback + SR topology
  • High switching frequency of 450kHz
  • Fully compatible with USB PD 2.0 standard
  • Support 5V/3A, 9V/3A, 15V/3A, 20V/3.25A output
  • Small size PCB (62mm*26.8mm*20mm)

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