TIDT205 February   2021

 

  1. 1Description
  2. 2Test Prerequisites
    1. 2.1 Voltage and Current Requirements
    2. 2.2 Considerations
    3. 2.3 Dimensions
  3. 3Testing and Results
    1. 3.1 Efficiency Graphs
    2. 3.2 Efficiency Data
    3. 3.3 Load Regulation
    4. 3.4 Thermal Image
    5. 3.5 Bode Plots
    6. 3.6 Conducted Emissions Testing (CISPR 25, Class 5)
  4. 4Waveforms
    1. 4.1 Switching
    2. 4.2 Output Voltage Ripple
    3. 4.3 Load Transients
    4. 4.4 Start-up Sequence
    5. 4.5 Termination Sequence

1 Description

This reference design provides the system rails for automotive vehicle-to-everything power. A 5-V bus is generated by the off-battery buck converter (LM63625-Q1), and this supplies all the point-of-load devices. The bus converter switches at 2.1 MHz, and the load converters (TPS628501-Q1) switch at 2.2 MHz. Easily-configurable jumpers allow users to enable and disable each device on the board and toggle the bus converter operational modes. A front-end EMI filter is included.

GUID-20210202-CA0I-JHZB-0GHT-VX0ZRJZV0LSR-low.jpg Figure 1-1 Board Top
GUID-20210205-CA0I-46JV-XMM6-402XGCSRFLM1-low.jpg Figure 1-2 Board Bottom