MCP3909RD-3PH1 Microchip Technology, MCP3909RD-3PH1 Datasheet - Page 25
MCP3909RD-3PH1
Manufacturer Part Number
MCP3909RD-3PH1
Description
REF DESIGN MCP3909 3PH ENGY MTR
Manufacturer
Microchip Technology
Datasheets
1.MCP3909T-ISS.pdf
(44 pages)
2.MCP3909T-ISS.pdf
(104 pages)
3.MCP3909RD-3PH3.pdf
(88 pages)
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
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2.5
.
FIGURE 2-6:
© 2009 Microchip Technology Inc.
JP4
JP5
JP6
1
1
1
1
N
PC
PB
PA
POWER SUPPLY
1
2
3
4
1
2
3
4
The power supply used in this design provides 3.3V and 5V. Since the energy meter for
a 3-phase 4-wire system is required to operate properly when any one phase is active,
a switching power supply module is used for convenience. T4 is the switching power
supply module.
Prior to the input of this module, additional protection circuitry is included with the meter
design. Figure 2-6 shows the input to the switching power supply module and the
additional filtering and protection circuitry. In Figure 2-6, R
bead, C
to improve anti-surge performance of the system.
Switching Power Supply Module (T4) and Additional Input Protection Circuitry.
R5
COILS
T4
A
B
C
N
N
C
B
A
1
, C
4
, C
Vo2
Vo1
G2
G1
A
B
C
N
6
, RV1, RV2 and RV3 are C
8
7
6
5
8
7
6
5
12V
C1
0.1U
+ C2
100uf
RV1
BB
Hardware Description
capacitors and varistors. They are used
C4
0.1u
JP6
Header 3
1
2
3
RV2
5
is the integrated ferrite
C6
0.1u
DS51723A-page 25
N
RV3
PA
PB
PC
N
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