STEVAL-IPE010V1 STMicroelectronics, STEVAL-IPE010V1 Datasheet - Page 68

• Manufacturer Part Number: STEVAL-IPE010V1
• Description: KIT DEMO ENERGY METER STPMC1/S1
• Manufacturer: STMicroelectronics
• Type: Other Power Managementr

Specifications of STEVAL-IPE010V1

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: No
• Utilized Ic / Part: STPMC1, STPMS1
• Maximum Operating Temperature: + 85 C
• Product: Power Management Development Tools
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Primary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: STPMC1, STPMS1
• Other names: 497-10754

Energy calculation algorithm
10.1
68/77
In case of shunt sensor (TCS = 1), an additional stage of internal digital differentiated
produces the value:
Equation 22
v
The shunt preamplifier, AD converter and calibrator produce the value:
Equation 23
vs = i R
The 2
Equation 24
v
Equation 25
v
The frequency compensated values are:
Equation 26
V
Equation 27
v
The 3
Equation 28
v
Equation 29
v
Active energy calculation
The active power is computed as follows.
First, the voltage stream from the 1
16-bit current from the 2
1
filter (
Equation 30
P
Equation 31
P
d
di
si
sic
diic
siic
st
dic
1
2
= dv
= ∫ v
= v
= v
= ∫ v
stage (
=
= ∫ v
=
= ∫ v
Equation 15
nd
rd
u
ui
u
d
S
v
/dt = A
s
/ k
stage internal integrations and DC cancellations produce the values:
v
stage internal integrations produce the values:
dt = A sin ( t) k
/ k
sic
dic
dt = - (C / ) cos ( t + ) k
ii
(A
i
Equation 14
INT
= - ABk
= ABk
INT
dt = - (C / ) sin ( t + ) k
dt = A cos ( t) k
I
/V
v
REF
v
si
di
INT
= - C cos ( t + )
cos ( t) k
= A
) k
INT
or
cos ( t) cos ( t + ) = ABk
I
Equation 24
sin ( t) sin ( t + ) = - ABk
= i k
or
sin ( t) / k
nd
DIF
Equation 23
S
stage (
= C sin ( t + )
DIF
DIF
k
INT
Doc ID 15728 Rev 4
k
INT
= A sin ( t)
), yielding:
Equation 16
INT
st
INT
= A cos ( t)
stage (
INT
) is multiplied to 16-bit voltage from the 2
Equation 13
or
INT
Equation 25
INT
[cos
[cos
or
+ cos (2
Equation 22
- cos (2
) and current stream from the
t + )] / 2
t + )] / 2
) is multiplied to the
nd
stage of
STPMC1