TIDT391 April   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 Dimensions
    4. 1.4 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 Start-Up Sequence
    2. 3.2 Switching
    3. 3.3 Short-Circuit Protection

2.3 Thermal Images

Table 2-3 shows the thermal images at full power charge. All images were captured with 25ºC ambient, after a 30-minute warm up.

Table 2-3
Temperature(°C) Test Condition
5VIN to 30V Battery Charge 9VIN to 30V Battery Charge 15VIN to 30V Battery Charge 20VIN to 30V Battery Charge Short Circuit Test Temperature Rise at 20VIN

Q2 (Buck High side MOS)

58.1

69.2

66.2

60.2

51.5
Q4 (Buck Low side MOS)

56.2

66.3

64.2

58.3

54.5
Q1 (Boost High side MOS)

65.2

75.3

72.7

66.2

42.4
Q3 (Boost Low side MOS)

77.2

83.4

78.3

73.4

42.3
Buck Boost Inductor

55.4

66.2

69.2

58.3

44.6
TPS25730D

40.2

45.2

47.5

46.1

42.1
BQ25756E

45.2

51.2

56.2

57.3

45.6
GUID-20240407-SS0I-QW3C-JWBT-L44WKBBXS84K-low.pngFigure 2-4 5VIN to 30V Battery Charge Thermal
GUID-20240407-SS0I-5PJH-V37G-6XNDGPLP4M60-low.pngFigure 2-6 15VIN to 30V Battery Charge Thermal
GUID-20240407-SS0I-PKZB-FCG3-W3DQB6WVL2PL-low.pngFigure 2-8 20VIN to 30V Battery Short Circuit Thermal Test
GUID-20240407-SS0I-SFDF-XJTJ-MCD92PJJMF2P-low.pngFigure 2-5 9VIN to 30V Battery Charge Thermal
GUID-20240407-SS0I-L7X5-VXDV-X3BTJKMGQWQH-low.pngFigure 2-7 20VIN to 30V Battery Charge Thermal