STEVAL-IPE010V1 STMicroelectronics, STEVAL-IPE010V1 Datasheet - Page 30

• 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

Theory of operation
Figure 11. Currents of the three phase system in example
30/77
The value I
register (internal value FFFF). It is a function of the sensor type, sensitivity and of the
current channel gain. Let us suppose that
I
The tamper condition is evaluated only if
This means that the sum of the RMS value of currents is not negligible with respect to
I
In this case this is true since:
I
The criterion for tamper detection is
This can also be expressed as
which means the sIRMS value must not exceed 3.13% of (I
In this example:
sIRMS = 0,149967 < 0.45 = (I
Then BCS = 0.
MAX
MAX
R
+ I
= 180 A
(the threshold corresponds to about 0.4% of I
S
+I
T
+I
MAX
N
= 14.4 A > 0,703125 A = I
corresponds to the maximum current value hold by each RMS current
sIRMS
Doc ID 15728 Rev 4
∑
⎛
⎜
⎝
I
X
∑
R
+ I
∑
i
I
4
X
R
S
i
X
⎞
⎟
⎠
+I
RMS
RMS
I
S
T
MAX
+I
I
N
T
) / 32
∑
∑
/ 256
I
8
N
i
I
X
4
X
RMS
MAX
I
256
MAX
).
∑
32
R
I
X
+ I
S
+I
T
+I
N
).
STPMC1