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SA9602HSA

SINGLE PHASE BIDIRECTIONAL POWER/ENERGY METERING IC WITH INSTANTANEOUS PULSE OUTPUT

South African Micro Electronic Systems 

SA9602H

The diagram below shows the behavior of the direction indicator, DIR, when energy

reversal takes place. The timing period for the DIR signal to change state, tDIR, will

be defined by the time it takes for the integrater to count down from its value at the

time of energy reversal. This is determined by the energy consumption rate.

I

t

V

t

D IR

D R-01 283

t

t DIR

The square wave signal on FMO indicates the polarity of the mains voltage.

V

t

FM O

t

t MA IN S

D R -01284

Due to comparator offsets, the FMO low to high transition can occur within a

range as shown above. The time between succesive low to high transitions will

be equal to the mains voltage period.

sames

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