MCP3909RD-3PH1 Microchip Technology, MCP3909RD-3PH1 Datasheet - Page 37

• Manufacturer Part Number: MCP3909RD-3PH1
• Description: REF DESIGN MCP3909 3PH ENGY MTR
• Manufacturer: Microchip Technology

Specifications of MCP3909RD-3PH1

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: No
• Utilized Ic / Part: MCP3909, PIC18F2520, PIC18F4550
• Primary Attributes: 3-Ph, 220 VAC, In Case, LCD, USB, GUI
• Secondary Attributes: Opto-Isolated Interface for Safety
• Operating Voltage: 220 V
• Operating Current: 5 A
• Description/function: Energy Meter
• For Use With/related Products: MCP3909
• Lead Free Status / RoHS Status: Not applicable / Not applicable

3.5.6
3.5.7
3.5.8
3.5.9
© 2008 Microchip Technology Inc.
PIC18F2520 Calculation and Register Description
PHy_I_RMS_GLSB
PHy_V_RMS_GLSB
PHy_W_OFF
PHy_W_GAIN
REGISTER 3-28:
Phase y current gain to produce 0.01A/LSB. The value is always less than one (for
example, 32,767 = 0.9999695). (Note this decimal point location, or LSB resolution of
0.01A, is specific for the 5(10)A, 220V rating that this meter is designed for).
REGISTER 3-29:
Phase y voltage gain to produce 0.1 V/LSB in the PHA_Y_V_RMS register. The value
is always less than one (for example, 32,767 = 0.9999695). (Note this decimal point
location, or LSB resolution of 0.1V, is specific for the 5(10)A, 220V rating that this meter
is designed for).
REGISTER 3-30:
Phase y active power offset (this is straight offset, not the square as with voltage and
current). A much larger value is need because the power is a running sum. This is a
32-bit signed value.
REGISTER 3-31:
Phase y active power gain so that all results can be calibrated to produce equal CF
pulses/watt-hour. The signed 16-bit number produces a change in the PHy_W_RAW
value before being added to the energy registers. A value of 32,767 represents a
99.9939% increase while a value of 8192 represents a decrease of 50%.
PHC_V_RMS_GLSB
PHA_V_RMS_GLSB
PHB_V_RMS_GLSB
PHC_I_RMS_GLSB
PHA_I_RMS_GLSB
PHB_I_RMS_GLSB
PHA_W_GAIN
PHB_W_GAIN
PHC_W_GAIN
PHA_W_OFF
PHB_W_OFF
PHC_W_OFF
Name
Name
Name
Name
PHY_I_RMS_GLSB REGISTERS
PHY_V_RMS_GLSB REGISTERS
PHY_W_OFF REGISTERS
PHY_W_GAIN REGISTERS
Bits
Bits
Bits
Bits
16
16
16
16
16
16
32
32
32
16
16
16
Address
Address
Address
Address
0x16A
0x17C
0x17E
0x160
0x164
0x168
0x162
0x166
0x170
0x174
0x178
0x180
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Cof
Cof
Cof
Cof
DS51643B-page 33