TIDT382 February   2024

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Considerations
    3. 1.3 Dimensions
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
      1. 2.1.1 LM25180-Q1 Efficiency Graph
      2. 2.1.2 SN6507-Q1 Efficiency Graph
      3. 2.1.3 UCC14130-Q1 Efficiency Graph
      4. 2.1.4 UCC25800-Q1 Efficiency Graph
      5. 2.1.5 Efficiency Comparison
    2. 2.2 Efficiency Data
      1. 2.2.1 LM25180-Q1 Efficiency Data
      2. 2.2.2 SN6507-Q1 Efficiency Data
      3. 2.2.3 UCC14130-Q1 Efficiency Data
      4. 2.2.4 UCC25800-Q1 Efficiency Data
    3. 2.3 Load Regulation
      1. 2.3.1 LM25180-Q1 Load Regulation
      2. 2.3.2 SN6507-Q1 Load Regulation
      3. 2.3.3 UCC14130-Q1 Load Regulation
      4. 2.3.4 UCC25800-Q1 Load Regulation
      5. 2.3.5 Load Regulation Comparison
    4. 2.4 Thermal Images
      1. 2.4.1 LM25180-Q1 Thermal Image
      2. 2.4.2 SN6507-Q1 Thermal Image
      3. 2.4.3 UCC14130-Q1 Thermal Image
      4. 2.4.4 UCC25800-Q1 Thermal Image
    5. 2.5 Common-Mode Current (CMI)
      1. 2.5.1 LM25180-Q1 CMI
      2. 2.5.2 SN6507-Q1 CMI
      3. 2.5.3 UCC14130-Q1 CMI
      4. 2.5.4 UCC25800-Q1 CMI
      5. 2.5.5 Common-Mode Current Comparison
  7. 3Waveforms
    1. 3.1 Switching
      1. 3.1.1 LM25180-Q1 Switching
      2. 3.1.2 SN6507-Q1 Switching
      3. 3.1.3 UCC25800-Q1 Switching
    2. 3.2 Output Voltage Ripple
      1. 3.2.1 LM25180-Q1 Output Voltage Ripple
      2. 3.2.2 SN6507-Q1 Output Voltage Ripple
      3. 3.2.3 UCC14130-Q1 Output Voltage Ripple
      4. 3.2.4 UCC25800-Q1 Output Voltage Ripple
      5. 3.2.5 Output Voltage Ripple Comparison
    3. 3.3 Input Voltage Ripple
      1. 3.3.1 LM25180-Q1 Input Voltage Ripple
      2. 3.3.2 SN6507-Q1 Input Voltage Ripple
      3. 3.3.3 UCC14130-Q1 Input Voltage Ripple
      4. 3.3.4 UCC25800-Q1 Input Voltage Ripple
      5. 3.3.5 Input Voltage Ripple Comparison
    4. 3.4 Load Transients
      1. 3.4.1 LM25180-Q1 Load Transients
      2. 3.4.2 SN6507-Q1 Load Transients
      3. 3.4.3 UCC14130-Q1 Load Transients
      4. 3.4.4 UCC25800-Q1 Load Transients
    5. 3.5 Start-Up Sequence
      1. 3.5.1 LM25180-Q1 Start-Up Sequence
      2. 3.5.2 SN6507 Q1 Start Up Sequence
      3. 3.5.3 UCC14130-Q1 Start-Up Sequence
      4. 3.5.4 UCC25800-Q1 Start-Up Sequence
    6. 3.6 Shutdown Sequence
      1. 3.6.1 LM25180-Q1 Shutdown Sequence
      2. 3.6.2 SN6507-Q1 Shutdown Sequence
      3. 3.6.3 UCC14130-Q1 Shutdown Sequence
      4. 3.6.4 UCC25800-Q1 Shutdown Sequence
    7. 3.7 Undervoltage Protection
      1. 3.7.1 LM25180-Q1 Undervoltage Protection
      2. 3.7.2 SN6507-Q1 Undervoltage Protection
      3. 3.7.3 UCC14130-Q1 Undervoltage Protection
      4. 3.7.4 UCC25800-Q1 Undervoltage Protection
  8. 4Summary
  9. 5References

1.2 Considerations

  • To do comparative analysis, a device designed for each of the following topologies was chosen:
    • PSR-flyback: LM25180-Q1
    • Push-pull: SN6507-Q1
    • Isolated DCDC module: UCC14130-Q1
    • LLC resonant: UCC25800-Q1
  • All the electrical parameters kept as similar as possible.
  • As shown in the project bock diagram, these isolated bias power supply devices are used in a distributed kind of architecture. Each device is used to supply one GaN switch with integrated driver. In each design, two isolated bias power supply circuits are used for a GaN half bridge.
  • Measurements, including efficiency, were taken at room temperature.
  • Efficiency reading was taken running one isolated bias power supply circuit only, while the other power supply circuit was disabled.
  • Efficiency measurement was done without EMI filter circuit.