TIDT295 August   2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 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
  5. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 VOUT Regulation
    3. 2.3 Thermal Images
  6. 3Waveforms
    1. 3.1 Start-up Waveforms
    2. 3.2 Output Voltage Ripple and Noise
    3. 3.3 Load Dynamic
    4. 3.4 Switching Node
    5. 3.5 Short-Circuit Protection

3.4 Switching Node

Switching node on SW1 and SW2 is shown in the following figures. The waveform channel key is as follows: Pink: SW1-VBUS, Light blue: SW2-VBAT

GUID-20220812-SS0I-DCMX-WWV3-B4SCBWM0FKWV-low.pngFigure 3-17 19 VBAT to 20 V, 3 A Full Load OTG Mode Working at Boost Mode
GUID-20220812-SS0I-SFT6-JCKS-HZM36TMV1TVM-low.pngFigure 3-19 21 VBAT to 20 V, 3 A Full Load OTG Mode Working at Buck Mode
GUID-20220812-SS0I-JVB8-GHHK-DRQ4PZVMSWHG-low.pngFigure 3-18 20 VBAT to 20 V, 3 A Full Load OTG Mode Working at Buck-Boost Mode

The following images illustrate charging mode switching node.

GUID-20220812-SS0I-7ZLB-ZT8Z-Q2VHDFR4V6SW-low.pngFigure 3-20 20 VBUS to VBAT 21 V Charge Mode Working at Boost Mode
GUID-20220812-SS0I-C2M9-R2GV-VH828CZ14VQ8-low.pngFigure 3-22 20 VBUS to VBAT 19-V Charge Mode Working at Buck Mode
GUID-20220812-SS0I-69WP-BMGF-2V2R0DZJD4KF-low.pngFigure 3-21 20 VBUS to VBAT 20 V Charge Mode Working at Buck-Boost Mode