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PM9106APE

SINGLE PHASE WATT MEASUREMENT MODULE WITH A 5 DIGIT LED DISPLAY

South African Micro Electronic Systems 

PM9106AP

2. LED Display

The PM9106AP has an on-board LED display comprising 5 (7 segment) common

cathode digits, as well as a sign LED.

The sign LED is addressed by DIG [5], the most significant digit by DIG [4] and the

least significant digit by DIG [0].

The position of the segments a, b, c, d, e, f and g are given in the diagram below:

a

f

b

.g .

e

c

d

h

DR-00914

The full scale power displayed is 20 000 watts. An overflow is indicated by a flashing

display.

3. Electrostatic Discharge (ESD) Protection

The device's inputs/outputs are protected against ESD according to Mil-Std 883C,

method 3015. The modules resistance to transients will be dependant upon the

protection components used.

4. Power Consumption

The overall power consumption rating for this power metering application (Figure 2),

is under 800mW, excluding the current sensor.

5. Circuit Description

The Application Circuit (Figure 2) shows the components required for the Watt

measurement module, using a shunt resistor for current sensing.

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