MAXQ3181 Maxim, MAXQ3181 Datasheet - Page 44

• Manufacturer Part Number: MAXQ3181
• Description: The MAXQ3181 is a dedicated electricity measurement front-end that collects and calculates polyphase voltage, current, active power and energy, and many other metering parameters of a polyphase load
• Manufacturer: Maxim

Low-Power, Active Energy, Polyphase AFE
This register contains the value by which the raw power value in each phase is multiplied before being presented to
the virtual power registers. The table below lists the raw power registers and the corresponding virtual registers.
PWR_CC establishes the amount of power represented by one PWR_LSB of the power registers. To avoid significant
conversion loss, PWR_LSB should be chosen such that PWR_CC is > 1000. Calculate the value of PWR_CC accord-
ing to the following formula:
44
Real power, phase A
Real power, phase B
Real power, phase C
Real power, total
Apparent power, phase A
Apparent power, phase B
Apparent power, phase C
Apparent power, total
Bit:
Name:
Reset:
Bit:
Name:
Reset:
______________________________________________________________________________________
15
7
DESCRIPTION
14
6
PWR CC
13
Power Units Conversion Coefficient High Byte
5
Power Units Conversion Coefficient Low Byte
Power Units Conversion Coefficient (PWR_CC) (0x018)
_
=
2
12
32
4
I
FS
×
PWR LSB
0x00
0x01
×
V
FS
_
11
3
C.ACT
C.APP
A.ACT
B.ACT
A.APP
B.APP
RAW
10
2
—
—
9
1
VIRTUAL
PWRP.C
PWRS.C
PWRP.A
PWRP.B
PWRS.A
PWRS.B
PWRP.T
PWRS.T
8
0