STEVAL-IPE012V1 STMicroelectronics, STEVAL-IPE012V1 Datasheet - Page 25

• Manufacturer Part Number: STEVAL-IPE012V1
• Description: EVAL BOARD ENERGY METER
• Manufacturer: STMicroelectronics
• Series: -r

Specifications of STEVAL-IPE012V1

• Design Resources: STEVAL-IPE012V1 Schematic STEVAL-IPE012V1 BOM
• Main Purpose: Power Management, Energy/Power Meter
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: STPM10BTR, STM8L152
• Primary Attributes: Single Phase with 1 Current Transformer & Shunt
• Secondary Attributes: Tamper Detection
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-11462

STPM10
taken from the 11
between the LSB value of the active energy register and the number of pulses provided per
each kWh (P) can be defined as:
Equation 2
Due to the innovative and proprietary power calculation algorithm, the frequency signal is
not affected by any ripple at twice the line frequency. This feature strongly reduces the
calibration time of the meter.
In a practical example where the desired P is 64000 pulses/kWh (=17.7 Hz*kW), we have:
Equation 3
k
This means that the reading of 0x00001 in the active energy register represents 7.63 µWh,
while 0xFFFFF represents 8 Wh.
The LED pin can be driven from AW (active energy wide band), AF (active energy limited at
fundamental), RW (reactive energy) or SW (apparent energy) according to the value of the
KMOT bit.
In this case, since the LED pin is driven by signals different from that of AW, some other
relationship between the LSB of the register and the number of pulses per kWh provided by
the meter (P) must be defined:
Equation 4
k
k
k
Table 9.
k
AW
AF
RW
SW
AW
=7.63*10-6 Wh
= 4*k
= k
= 2*k
=
2
1000
AW
KMOT (2 bits)
11
AW
AW
⋅
[VAh]
P
[Wh]
LED pin configuration
[ ]
[VARh]
Wh
0
1
2
3
th
bit of the active energy register, and consequently a relationship
Doc ID 17728 Rev 3
Signal available on LED pin
AW Type0*
AF Type1*
RW
SW
Theory of operation
# of pulses
P [kVARh]
P [kVAh]
P [kWh]
P [kWh]
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