Infineon EVAL-PS-DP-MAIN-M5 Manual page 15

p u b l i c
EVAL-PS-DP-MAIN-M5
Evaluation platform for 600 – 1200 V SiC MOSFETs and IGBTs in TO-247
4pin/3pin packages
Table of contents
Adjusting the heatsink temperature
Besides room temperature, switching losses can also be measured at 100°C and more. Therefore, the
measuring setup should help users control and track the case temperature of a test device. A small heatsink
that functions as a tiny heating element is included on this test board. The temperature of this heatsink can be
controlled and monitored using the power resistor and the negative temperature coefficient (NTC) thermistor,
respectively. Alternatively, the heatsink's temperature can also be monitored and adjusted using the XMC4800
controller.
To adjust the heatsink's temperature manually, follow these steps:
Short the pins 2 and 3 of X5 to power the heater or alternatively use the IOT XMC4800 controller card.
1.
Connect the power supply to X4, +15V_ISO, and GND_ISO.
Connect the heating element to +15V_ISO/HEATER- (i.e., pin 1 and 2 terminals of X6), and the NTC to
NTC+/GND_ISO (i.e., pin 3 and 4 terminals of X6).
Use the power supply to adjust the temperature of the heatsink.
Monitor the actual temperature value using the ohmmeter and the NTC characteristic. Alternatively,
measure the voltage at test points X7 and X8 (i.e., NTC_VSENSE+ and NTC_VSENSE-) to calculate the
temperature.
Configuring the double-pulse test
Switching losses of the devices can be analyzed using a double-pulse test. It generates both a turn-off and a turn-
on event by applying two consecutive pulses on the gate terminal of the switch – hence the expression double
pulse. This section explains how to conduct a double-pulse test using Configuration 1 and Configuration 2.
To perform a double-pulse test on the evaluation board:
Assemble the devices under tests S1 and S2.
1.
Connect the driver to the proper emitter pin.
Adjust the driving voltages for S2, and if necessary, also for S1, as per Section 2.6.1.
a. Set the jumper X108/X106 to +ADJ.
b. Use the jumper X106/X108 to set the turn-off voltage to 0 V or -5 V.
c. Adjust the turn-on and turn-off gate resistors R102/R108 for a positive drive voltage and
R105/R107 for a negative drive voltage for high-side and low-side respectively.
Connect the oscilloscope probes to measure V
a. Use probe adapters to measure V
b. Measure I
Connect an auxiliary supply to the 15 V/SGND terminal of the board to provide a voltage of 15 V.
Connect a signal generator to X103/X104 and provide a double-pulse pattern if not using the XMC4800
controller for generating the pulse.
If required, connect a power supply to the GND_ISO/+15V_ISO (X4 pin 1 and 2) terminals and set the
voltage level.
Monitor the temperature using the ohmmeter connected to X7 and X8 as explained in Section 2.6.2.
Connect a high-voltage source to HV_VDC (X9) and GND_SEC (X11), and short HV_VDC (X9) and
HV_Midpoint (X10).
Slowly increase the voltage and monitor the current and voltage waveforms on the oscilloscope.
User guide
current.
D
, V , and I of S2.
DS GS D
and V with ordinary voltage probes.
DS GS
15 Revision 1.0
2025-01-10