DG-IRMCK203 Datasheet, PDF (66/67 Pages) International Rectifier – Application Developer’s Guide

Incoming signal
from IR2175
Phase V or W
Period Counter
IRMCK203 Application Developer’s Guide
Duty varies as sensing
current changes
TA(n-1)
TA(n)
TB(n-1)
TB(n)
Phase V or W
Carrier Frequency
Period Counter
130kHz
(IR2175)
130kHz
(IR2175)
IFB event
after Digital Filter
IFB event
after Digital Filter
Figure 31.
16 sysclk =
Caluculate
TA(n-1)*4096 /
filtered_TB(n-1)
Current Feedback Calculation Timing
IFB event
after Digital Filter
16 sysclk =
Caluculate
TA(n)*4096 /
filtered_TB(n)
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