XMCA1 – XM3 SiC Driver Core Adapter

Xmca1 - Xm3 Core Adapter Board 1 Spec Sheet V1

© 2021 AgileSwitch, LLC

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Temperature and High Voltage PWM Monitoring

The AgileSwitch 2ASC-12A1HP Driver provides two 31.5 kHz, 5.0V PWM output signals that monitor the

thermistor temperature (isolated or non-isolated) and the DC Link Voltage (High Side drain to Low Side source)

of the SiC MOSFET power module. The PWM signals have an output impedance of 510Ω. When combined

with an external low pass filter, these signals represent a real time voltage for both High Voltage and Thermistor

Temperature. A Sallen-Key active low pass filter can be used with these outputs as shown below with a 2 kHz

cut-off frequency. The cut-off frequency can be optimized for your application. For simplicity, a simple RC low

pass filter with 100 Hz cut-off frequency can also be used.

Figure 4 Example of a Low Pass Filter for DC Link PWM output