TIDT347A November   2023  – October 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 Data
    2. 2.2 Efficiency Graphs
    3. 2.3 Thermal Images
  7. 3Waveforms
    1. 3.1 Charging Waveform
    2. 3.2 Switching Waveform
    3. 3.3 Short-Circuit Protection
  8.   Trademarks

2.3 Thermal Images

Table 2-2 shows the thermal images at fast charge mode at maximum power condition for each battery cell condition. All image were captured with 25ºC ambient, after a 30-minute warm up.

Table 2-2 Thermal Results: Fast Charge Mode at Maximum Power Conditions for Each Battery Cell Condition
Temperature (°C) Test Condition
Component 20 Vsys and 10S Full-Load Charging 20 Vsys and 7S Full-Load Charging 20 Vsys and 4S Full-Load Charging

Q2 (Vsys high side)

 63.2°C 50.4°C 46.2°C
Q4 (Vsys low side) 61.4°C 49.3°C 44.2°C
Q1(Vbat high side) 67.3°C 53.4°C 42.3°C
Q3 (Vbat low side) 75.6°C 57.2°C 40.4°C
Buck-Boost Inductor 66.5°C 51.2°C 42.1°C
TPS25751 74.5°C 64.5°C 57.2°C
BQ25756 56.2°C 50.3°C 45.2°C
Rsense (Input) 61.5°C 47.8°C 43.2°C
Rsense (CHG) 52.6°C 42.3°C 40.2°C

Figure 2-3 through Figure 2-5 illustrate the thermal images at three different conditions.

PMP41083 Charge Mode Thermal 20 Vsys to 10S VbatFigure 2-3 Charge Mode Thermal 20 Vsys to 10S Vbat
PMP41083 Charge Mode Thermal 20 Vsys to 4S VbatFigure 2-5 Charge Mode Thermal 20 Vsys to 4S Vbat
PMP41083 Charge Mode Thermal 20 Vsys to 7S VbatFigure 2-4 Charge Mode Thermal 20 Vsys to 7S Vbat