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Test Setup and Results
15
SLLU298 – May 2018
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ISO5852SDW Driving and Protecting SiC and IGBT Power Modules
2.2.3
Thermistor Amplifier Test
Test setup for thermistor amplifier test is shown in
Figure 7
.
Figure 7. Thermistor Amplifier Test Setup
1. Enable power supply PS1
2. Gradually increase the voltage at PS1 into 4.95 V to 5.05 V range and monitor current using MM1 that
should not exceed 150 mA
3. Set resistances using Resistance Decade Box in accordance to
Table 5
and monitor voltages at MM5
and MM6
4. Gradually reduce the voltage of power supply PS1 down to 0 V and disable it
Table 5. Themistor Amplifier Output Signals
RESISTANCE
5.0 k
Ω
2.0 k
Ω
800
Ω
280
Ω
MM5 (differential output)
1.85 V - 1.91 V
0.85 V - 0.91 V
0.36 V - 0.39 V
0.125 V - 0.145 V
MM6 (common output)
0.4 V - 0.6 V
0.8 V - 1.2 V
1.0 V - 1.4 V
1.2 V - 1.5 V