TIDT184 December   2021

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Test Setup
  5. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
  6. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Start-Up Sequence

1.3 Test Setup

Use the following list to set up the PMP40937 test equipment:

  1. Connect a DC source to J1, set the output voltage to 17-V and current limit to 3-A, and then turn off the supply.
  2. Connect a voltage meter across TP1 (VBUS) and TP2 (PGND) to measure the input voltage.
  3. Connect a current meter between the DC source and TP1 to measure the input current into the VBUS.
  4. Connect Load #1 to J5, set Load #1 to constant voltage mode, set output voltage to 16.0-V, current limit to 3-A. A 470-µF, 25-V capacitor is recommended to add to the output if using the battery simulator.
  5. Connect a power meter between TP5 and J5 to measure the battery voltage and charging current.
  6. Set Load #2 to constant current mode, and then disable the load. Connect Load #2 to J3 and J4.
  7. Connect the USB2ANY between computer USB port and J2.
  8. DC source and Load #1, measure and verify VSYS-PGND (TP4 and TP2) = 16.0-V ± 0.2-V.
  9. Launch the TI-CHARGER-GUI and select device BQ25672, connect the hardware if not connected.
GUID-20211121-SS0I-B0LZ-T04R-XNPQLWRF2SM5-low.jpgFigure 1-1 Test Setup