ACT364
TYPICAL APPLICATION CONT’D
to a single point (star ground configuration).
Rev 4, 14-Nov-12
V
FB
Sampling Waveforms
ACT364 senses the output voltage information
through the V
FB
waveforms. Proper V
FB
waveforms
are required for IC to operate in a stable status. To
avoid mis-sampling, 1.5µs blanking time is added to
blank the ringing period due to the leakage
inductance and the circuit parasitic capacitance.
Figure 2 is the recommended V
FB
waveform to
guarantee the correct sampling point so that the
output information can be sent back into the IC to
do the appropriate control.
Figure 2:
1.5µs
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TM
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