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A
Using the Device Heater
When making a Double-Pulse Test measurement with the Device Heater
activated and a valid temperature specified, the Control Software automatically
initiates the measurement when the heater reaches the specified temperature.
However, there are several details to consider:
This appendix explains how the device heating system and various temperature
settings in the Control Software work together.
1 Requires PD1000A Control Software version 2020.820 or later and Test Fixture Firmware A.01.03 or later. Ambient to
°
+175
C is for TO-247 device packages only; ambient to +150
Keysight PD1500A Double-Pulse Test System
PD1000-62001
Device Heater with
Integrated Type K
Thermocouple shown
with Clamp
– DUT temperature affects the following: T
delay time, Turn on dv/dt, Turn on and Turn off di/dt,
– Are the heater and thermocouple properly connected to the DUT?
– Are the heater and thermocouple connected to the Test Fixture?
– Is the heater activated in the PD1000A DPT Control Software?
– You may want the heater to settle at the specified temperature before
initiating the DPT measurement. Don't forget that the heater needs to heat
a large thermal mass including the DUT itself and the aluminum clamp.
– After the heater reaches the specified temperature, it may take a few
seconds for the internal die of the device itself to reach that temperature.
– What happens if the heater fails to achieve the specified temperature?
Use of the heater/thermocouple is optional. However, they must
be connected to the Test Fixture before powering-up the
PD1500A system. Reboot the PD15000A if the heater is not
detected.
Heater temperatures between 150 ° C and 175 ° C
for TO-247 device packages. Do not use temperatures above 150
2
°C for D
PAK devices.
Using the Device Heater
transition time, T
on
°
C for SMD devices.
and Turn off
on
1
are valid only
57
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