參數(shù)資料
型號: 71M6511H-IGT
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 電源管理
英文描述: 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP64
封裝: LQFP-64
文件頁數(shù): 66/98頁
文件大?。?/td> 1278K
代理商: 71M6511H-IGT
71M6511/71M6511H
Single-Phase Energy Meter IC
DATA SHEET
NOVEMBER 2010
Page: 69 of 98
2005–2010 Teridian Semiconductor Corporation
V2.7
A Maxim Integrated Products Brand
Instantaneous Power Measurement Variables
The FREQSEL Register selects the input phase used for frequency measurement and for the MAIN_EDGE counter. The
frequency measurement is implemented using the frequency locked loop of the CE for the selected phase.
IxSQSUM_X and VxSQSUM are the squared current and voltage samples acquired during the last accumulation interval.
INSQSUM_X can be used for computing the neutral current.
CE
Address
Name
Description
33
RESERVED
41
FREQ_X
Fundamental frequency.
LSB
6
32
10
587
.
0
2
S
F
Hz for MUX_DIV = 1
or
6
32
10
763
.
0
2
S
F
Hz for MUX_DIV = 2
4A
I0SQSUM_X
The sum of squared current samples from each element.
LSB = 6.6952*10
-13 IMAX2 / In_82 A2h (for MUX_DIV = 1)
LSB = 5.1501*10
-13 IMAX2 / In_82 A2h (for MUX_DIV = 2)
4B
I1SQSUM_X
4C
RESERVED
4D
RESERVED
4E
V0SQSUM_X
The sum of squared voltage samples from each element.
LSB= 6.6952*10
-13 VMAX2 V2h (for MUX_DIV = 1)
LSB = 5.1501*10
-13 VMAX2V2h (for MUX_DIV = 2)
4F
RESERVED
50
RESERVED
The RMS values can be computed by the MPU from the squared current and voltage samples as per the formulae:
Note: FS = 2520.6Hz (MUX_DIV = 1) or 3276.8Hz (MUX_DIV = 2)
Other Measurement Parameters
MAINEDGE_X is useful for implementing a real-time clock based on the input AC signal. MAINEDGE_X is the number of half-
cycles accounted for in the last accumulated interval for the AC signal of the phase specified in the FREQSEL register.
CE
Address
Name
Description
52
RESERVED
53
RESERVED
55
MAINEDGE_X
The number of edge crossings of the selected voltage in the previous
accumulation interval. Edge crossings are either direction and are de-
bounced.
ACC
S
RMS
N
F
LSB
VxSQSUM
Vx
=
3600
ACC
S
RMS
N
F
LSB
IxSQSUM
Ix
=
3600
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