MCP3909-I/SS Microchip Technology, MCP3909-I/SS Datasheet - Page 93

• Manufacturer Part Number: MCP3909-I/SS
• Description: IC POWER METERING-1 PHASE 24SSOP
• Manufacturer: Microchip Technology

Specifications of MCP3909-I/SS

• Package / Case: 24-SSOP (0.200", 5.30mm Width)
• Input Impedance: 390 KOhm
• Measurement Error: 0.1%
• Voltage - I/o High: 2.4V
• Voltage - I/o Low: 0.85V
• Current - Supply: 2.3mA
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Meter Type: Single Phase
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Supply Voltage Range: 4.5V To 5.5V
• Digital Ic Case Style: SSOP
• No. Of Pins: 24
• Interface Type: Serial, SPI
• Supply Voltage Max: 5.5V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MCP3909EV-MCU16 - EVALUATION BOARD FOR MCP3909MCP3909RD-3PH1 - REF DESIGN MCP3909 3PH ENGY MTR
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

© 2009 Microchip Technology Inc.
3. Four-quadrant reactive energy: metering reactive energy in positive/negative
FIGURE C-7:
Active out (-A)
Active out (-A)
Active out (-A)
Active out (-A)
reactive energy cannot truly reflect the status of reactive energy, whereas
4-quandrant reactive energy measuring gives a true picture of energy exchange.
Reactive energy in four quadrants represents four different reactive energy (see
Figure C-7). And the reactive energy is accumulated depending on which
quadrant it is located.
A－有功电能；R—无功电能；R
A－有功电能；R—无功电能；R
A－有功电能；R—无功电能；R
A－有功电能；R—无功电能；R
Where:
Definition Of 4 Quadrants To Measure Electrical Energy.
R
R
A
R
C
L
图2.4
图2.4
L
L
L
L
—感性无功电能；R
—感性无功电能；R
—感性无功电能；R
—感性无功电能；R
=
=
=
=
III (-R
III (-R
III (-R
III (-R
电能测量四象限定义
电能测量四象限定义
II (R
II (R
II (R
II (R
Reactive in (+R)
Reactive in (+R)
Reactive in (+R)
Reactive in (+R)
Reactive out (-R)
Reactive out (-R)
Reactive out (-R)
Reactive out (-R)
L
L
L
L
Power Calculation Theory
C
C
C
C
)
)
)
)
)
)
)
)
is active energy,
is reactive energy
is inductive reactive energy
s capacitive reactive energy
C
C
C
C
—容性无功电能
—容性无功电能
—容性无功电能
—容性无功电能
IV (-R
IV (-R
IV (-R
IV (-R
I (R
I (R
I (R
I (R
L
L
L
L
Φ
Φ
Φ
Φ
)
)
)
)
C
C
C
C
)
)
)
)
Current vector
Voltage vector
电流向量
电流向量
电流向量
电压向量
电压向量
电压向量
Active in (+A)
Active in (+A)
Active in (+A)
Active in (+A)
DS51723A-page 93