TIDT427 December   2024

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Dimensions
    3. 1.3 Considerations
  6. 2Testing and Results
    1. 2.1 Efficiency Graph
    2. 2.2 Efficiency Data
      1. 2.2.1 30V Input Voltage
      2. 2.2.2 48V Input Voltage
      3. 2.2.3 60V Input Voltage
    3. 2.3 Thermal Images
      1. 2.3.1 Thermal Images at 48VIN, 12VOUT, 10A, No Heatsink
      2. 2.3.2 Thermal Images at 48VIN, 12VOUT, 20A, RS-PRO 750-0951 Heatsink
    4. 2.4 Bode Plots
      1. 2.4.1 30V Input Voltage
      2. 2.4.2 48V Input Voltage
      3. 2.4.3 60V Input Voltage
  7. 3Waveforms
    1. 3.1 Switching
      1. 3.1.1 48V Input Voltage
        1. 3.1.1.1 0A Output Current
        2. 3.1.1.2 20A Output Current
      2. 3.1.2 60V Input Voltage
      3. 3.1.3 30V Input Voltage
    2. 3.2 Output Voltage Ripple
    3. 3.3 Input Voltage Ripple
    4. 3.4 Load Transients

Description

This reference design is a power supply generating a regulated 12V output from a nominal 48V battery input (ranging from 30V to 60V). The circuit is designed for 20A continuous output current. The LM5148-Q1 buck controller provides switching signals to a LMG2100R044 half-bridge GaN power stage with integrated gate driver.