TIDT394 May   2024

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Dimensions
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
    4. 2.4 Bode Plots
  7. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Voltage Ripple
    3. 3.3 Short-Circuit Protection
    4. 3.4 Load Transients
    5. 3.5 Start-up Sequence
    6. 3.6 Current Monitor Output

Description

This reference design uses the TPS7H5002-SP PWM controller to control a synchronous buck for a nominal 12V input to a fixed output at 5.1V, up to 15A load. The TPS7H6023-SP drives GaN FETs for a robust design in space-based applications. The output current is directly sensed for telemetry and over-current protection. This design switches at 750kHz, and achieves over 92% efficiency with output ripple below 30mV.