TIDT402 February   2025

 

  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 Graph
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
      1. 2.3.1 20A Output Current
      2. 2.3.2 26A Output Current
    4. 2.4 Bode Plots
  7. 3Waveforms
    1. 3.1 Switching
      1. 3.1.1 26A Output Current
      2. 3.1.2 4A Output Current
    2. 3.2 Output Voltage Ripple
    3. 3.3 Input Voltage Ripple
    4. 3.4 Load Transients
    5. 3.5 Start-up Sequence
    6. 3.6 Shutdown Sequence

Description

This design showcases a dual-phase automotive boost converter for Class-H audio applications using LMG2100R026 gallium nitride (GaN) half bridges and offering analog- or digital-output voltage tracking. The output power is 1000W at 11V input voltage (1250W peak at 12V). The converter area measures only 47mm × 48mm, not including the reverse polarity protection and bulk input capacitance.

This test report is based on the LM5125-Q1. The pin-compatible LM51251-Q1 variant offering additional I²C for diagnostics and control can also be used on this design.