MCP3909RD-3PH3 Microchip Technology, MCP3909RD-3PH3 Datasheet - Page 58
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MCP3909RD-3PH3
Manufacturer Part Number
MCP3909RD-3PH3
Description
REF DESIGN FOR MCP3909 W/18F2520
Manufacturer
Microchip Technology
Datasheets
1.MCP3909T-ISS.pdf
(44 pages)
2.MCP3909T-ISS.pdf
(104 pages)
3.MCP3909RD-3PH3.pdf
(88 pages)
4.MCP3909-ISS.pdf
(40 pages)
Specifications of MCP3909RD-3PH3
Main Purpose
Power Management, Energy/Power Meter
Utilized Ic / Part
MCP3909, PIC18F2520, PIC18F4550
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Secondary Attributes
-
Embedded
-
Primary Attributes
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
MCP3909 3-Phase Energy Meter Reference Design
DS51643B-page 54
EQUATION 5-28:
For RMS LSB correction, the following equations apply:
EQUATION 5-29:
EQUATION 5-30:
EQUATION 5-31:
EQUATION 5-32:
Note:
Note:
Note:
PHY_V_RMS_GLSB
PHY_I_RMS_GLSB
Convert to 16-bit signed integer for compatibility with 18F2520 register and
firmware calculations
Convert to 16-bit signed integer for compatibility with 18F2520 register and
firmware calculations
Convert to 16-bit signed integer for compatibility with 18F2520 register and
firmware calculations
ILSB = Value from
PHY_V_RMS_OFF
VLSB = Value from
=
=
----------------------------------------------------------------------- - 32768
------------------------------------------------------------------------- 32768
-------------- -
65536
-------------- -
65536
Table 6-2
VR
IR
Table 6-4
1
1
=
+
+
⎛
⎝
---------------------------------------------------- -
------------------------------ -
VG VG 1
PHY_I_RMS_OFF
PHY_V_RMS_OFF
VR1 VR2
⎛
⎝
⎛
⎝
based on I
------------ -
ILSB
------------- -
VLSB
based on V
I
V
•
B
B
–
65536
⎞
⎠
⎞
⎠
–
MAX
© 2008 Microchip Technology Inc.
⎞
⎠
B
value
–
value
VR
2
•
•