TIDT307 October   2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Considerations
    3. 1.3 Dimensions
  5. 2Testing and Results
    1. 2.1 Efficiency Graphs 9 VIN
    2. 2.2 Efficiency Data
    3. 2.3 Output Voltage Regulation (9 VIN)
    4. 2.4 Thermal Images
  6. 3Waveforms
    1. 3.1 Switching
      1. 3.1.1 Primary Side
      2. 3.1.2 Secondary Side
    2. 3.2 Output Voltage Ripple
    3. 3.3 Start-Up Sequence

1.2 Considerations

  • To simplify the measurement process, the three output rails were shorted together. This report considers a single output voltage of 9.0 V, 150 mA.
  • Transformer structure: the three secondary windings were wired together to provide a high symmetrical structure.
GUID-20220926-SS0I-SKFZ-VDSC-FM6Q03PWVJRJ-low.png Figure 1-1 Transformer Structure
  • Number of turns: primary winding (Np): 32, secondary windings (Ns): 36 (Coated copper wire, V 180 Ø, 0.20 mm)
  • Measured inductance of primary winding: 5.9 µH (magnetizing), 1.59 µH (leakage)
  • Measured inductance of secondary winding: 2.16 µH (leakage)