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IRS26302DJ
Figures 22 and 23 present lab data that illustrates the characteristics of the input filters while receiving ON and OFF
pulses.
The input filter characteristic is shown in Figure 22; the left side illustrates the narrow pulse ON (short positive pulse)
characteristic while the left shows the narrow pulse OFF (short negative pulse) characteristic. The x-axis of Figure 22
shows the duration of PW IN , while the y-axis shows the resulting PW OUT duration. It can be seen that for a PW IN
duration less than t FIL,IN , that the resulting PW OUT duration is zero (e.g., the filter rejects the input signal/noise). We
also see that once the PW IN duration exceed t FIL,IN , that the PW OUT durations mimic the PW IN durations very well over
this interval with the symmetry improving as the duration increases. To ensure proper operation of the HVIC, it is
suggested that the input pulse width for the high-side inputs be ≥ 500 ns.
The difference between the PW OUT and PW IN signals of both the narrow ON and narrow OFF cases is shown in
Figure 23; the careful reader will note the scale of the y-axis. The x-axis of Figure 21 shows the duration of PW IN ,
while the y-axis shows the resulting PW OUT –PW IN duration. This data illustrates the performance and near symmetry
of this input filter.
Figure 22: IRS2336xD input filter characteristic
Figure 23: Difference between the input pulse and the output pulse
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