TIDT349 January   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
    5. 1.5 Test Setup
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
  7. 3Waveforms
    1. 3.1 Charge Mode Start-Up Waveform
    2. 3.2 OTG Mode Start-Up Waveform
    3. 3.3 Voltage Transition at OTG Mode
    4. 3.4 Ripple and Noise at OTG Mode
    5. 3.5 Load Transients at OTG Mode
    6. 3.6 Switching Waveform
    7. 3.7 Overcurrent Protection at OTG Mode
    8. 3.8 Short-Circuit Protection at OTG Mode
    9. 3.9 Short-Circuit Protection at Charge Mode

3.9 Short-Circuit Protection at Charge Mode

Figure 3-33 and Figure 3-34 show the short-circuit protection and recovery waveform, once the battery voltage falls below Vbat_short (2.5V), the device is forced into PFM mode, and current is reduced to around 200mA. Once the battery short is removed, it returns to normal operation.

GUID-20230812-SS0I-DGWF-W8BZ-RKF6NFPJM6P6-low.pngFigure 3-33 Short-Circuit Protection and Recovery at 40Vbat and 20Vsys
GUID-20230812-SS0I-06QR-GBLM-XLW9LXMBKRRQ-low.pngFigure 3-34 Zoom Waveform During SCP