Broadcom ACPL-C740 User Manual page 5

ACPL-C740 Evaluation Kit Board User Guide
3. If there is an updated FPGA bitfile or a newly configured bitstream file, this can be can be uploaded by clicking Load
FPGA Bit File on the top-left corner of the application GUI. When the bitfile is being uploaded, the green DONE LED
goes off and the red UPLOAD LED displays. When uploading is completed, the red UPLOAD LED goes off, while the
green DONE LED displays again to signal completion. The FPGA LOAD Completed! pop-up appears, as shown below.
4. For quick help, click Help from the top-right corner of the application GUI, then select the setup guide. The help guide
also describes the calibration procedure to zero the offset.
Measurement
There are a few ways to apply an input signal to the evaluation board:
Apply input current signal with a shunt resistor.

Example: Select the shunt resistor value is shown below:
If maximum RMS current through the motor = 30A, 20% overloads during normal operation, then, peak current is 51A
(30 × 1.414 × 1.2). The recommended maximum input voltage for ACPL-C740 is ±200 mV.
Shunt resistor value = V/I = 200 mV/51A ≈ 4 mΩ
Power dissipation = I
Broadcom
2 2
× R = (30) × 4 mΩ = 3.6W
Isolated Sigma-Delta Modulator
ACPL-C740-EvalKit-UG100
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