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ACPL-352J Reference Manual
Infineon EconoPIM™ 3 IGBT Module EB1200-352J Evaluation Board
4.4 IGBT Current Measurement
To enable users to obtain a semiconductor current waveform during switching instances, the board is designed with two
dedicated holes mechanically positioned to cover the traces connecting the low-side emitters and the negative potential of
the DC bus capacitors, as shown in
Figure
14. Holes with ɸ = 5 mm enable using a Rogowski current probe for current
measurement purposes.
Figure 14: Dedicated Holes Enable Users to Measure the Current of the Single IGBT
4.5 Temperature Measurement
The EB1200-352J contains the temperature measurement circuit shown in
Figure
15. The voltage drop on the PIM's
negative temperature coefficient (NTC) thermistor is amplified using an ACPL-C87A isolated linear optocoupler and
additionally buffered using an operation amplifier.
Figure 16
shows the typical temperature response of the measurement
circuit. Note that the output voltage range can be adjusted by changing the value of the feedback resistor R104 as well as
resistors R102 and R103 in the amplifier circuit.
Broadcom
ACPL-352J-EB1200-RM100
20
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