SNIA053 june   2023 TMP61-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Heat Sink Temperature Sensor Monitoring
  5. 2Test Overview
    1. 2.1 Hardware
      1. 2.1.1 Keysight E3631A Power Supply
      2. 2.1.2 Sorensen DCS 40-25E Programmable DC Power Supply
      3. 2.1.3 B&K Precision 8500 DC Electronic Load
      4. 2.1.4 TDS3014B Tektronix Digital Oscilloscope
      5. 2.1.5 Fluke TiS60+ Thermal Imager
      6. 2.1.6 MSP430F5529LP LaunchPad
    2. 2.2 Isolated Gate Driver
    3. 2.3 IGBT Module
    4. 2.4 NTC Ring Lug
    5. 2.5 TMP6 Ring Lug
    6. 2.6 Schematic
  6. 3Test Implementation
    1. 3.1 Data Collected
    2. 3.2 Test Results
  7. 4Design Recommendations
    1. 4.1 Ring Lugs for the TMP6
    2. 4.2 Thermal Epoxy
  8. 5Summary
  9. 6References

3.1 Data Collected

After allowing the heat sink to run for 20 minutes, the temperature of the top of the heat sink, TMP6 ring lug, and NTC ring lug are collected using the FLIR thermal camera. As shown in Figure 3-7, the top of the heat sink measured 60.3°C. Figure 3-8 and Figure 3-9 show the TMP6 and NTC ring lug temperatures as 58.3°C and 58.8°C respectively. All temperatures corresponded well with each other.

GUID-318D0D40-767E-4E93-A7A5-4E8CA29CAE07-low.jpg Figure 3-7 Heat Sink Final Temperature
GUID-06831E25-4B68-4313-A28C-AF18D56F6A2B-low.jpg Figure 3-8 TMP6 Ring Lug Final Temperature
GUID-AC402492-D82B-4D76-9036-FDE713993A3F-low.jpg Figure 3-9 NTC Ring Lug Final Temperature

Table 3-1 shows the final temperatures recorded.

Table 3-1 Temperature Data
FLIR Thermal Image Data Thermistor Voltage Feedback
Heat Sink Temperature TMP61 Ring Lug Temperature NTC Ring Lug Temperature TMP6 Reported Temperature NTC Reported Temperature
60.3°C 58.3°C 58.8°C 53.5°C 46.3°C