SA9605A
8.94
µ
s
71.55
µ
s
8.94 µ s
DIR
PHASE 1,
POSITIVE
FOUT1
PHASE 1,
NEGATIVE
DIR
FOUT1
DIR
PHASE 2,
POSITIVE
FOUT1
DIR
PHASE 2,
NEGATIVE
FOUT1
DIR
PHASE 3,
POSITIVE
FOUT1
DIR
PHASE 3,
NEGATIVE
FOUT1
DR-01145
These waveforms demonstrate how to establish the direction of energy flow as well
as the phase from which the energy is measured. The direction of energy indicated
on pin DIR is HIGH for POSITIVE energy flow and LOW for NEGATIVE energy flow,
for the entire LOW period of the FOUT1 pulse. The phase to which the direction
indication on the DIR pin refers can be ascertained by counting the number of falling
edges on the DIR pin prior to the falling edge of the FOUT1 pulse. The supervision
of the DIR pin can be accomplished with a µController.
Although FOUT1 has a fixed frequency output, the table below shows the various
frequencies selectable for rated conditions on FOUT2.
User Selectable Output Frequency
FOUT2
PGM1
PGM0
(Hz)
5.11
3.83
2.55
N/A
0
0
1
1
0
1
0
1
7/14
sames
SAMES [ SAMES ]
