Microchip MCP39F521 Bedienungsanleitung


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2015 Microchip Technology Inc. DS20005442A-page 1
MCP39F521
Features
Power Monitoring Accuracy Capable of 0.1%
Error Across 4000:1 Dynamic Range
Built-In Calculations on Fast 16-bit Processing
Core
- Active, Reactive, Apparent Power
- True Root Mean Square (RMS) Current,
RMS Voltage
- Line Frequency, Power Factor
64-bit Wide Import and Export Active Energy
Accumulation Registers
64-bit Four Quadrant Reactive Energy
Accumulation Registers
Signed Active and Reactive Power Outputs
Dedicated Zero Crossing Detection (ZCD) Pin
Output with Less than 100 µs Latency
Automatic Event Pin Control through Fast Voltage
Surge Detection, Less than 5 ms Delay
• I2C Interface, up to 400 kHz Clock Rate
Two Independent Registers for Minimum and
Maximum Output Quantity Tracking
Fast Calibration Routines and Simplified
Command Protocol
512 Bytes User-Accessible EEPROM through
Page Read/Write Commands
Low-Drift Internal Voltage Reference,
10 ppm/°C Typical
28-lead 5 x 5 mm QFN Package
Extended Temperature Range -40°C to +125°C
Applications
Power Monitoring for Home Automation
Industrial Lighting Power Monitoring
Real-Time Measurement of Input Power for
AC/DC Supplies
Intelligent Power Distribution Units
Description
The MCP39F521 is a highly integrated, complete
single-phase power-monitoring device, designed for
real-time measurement of input power for AC/DC
power supplies, power distribution units, consumer and
industrial applications. It includes dual-channel
delta-sigma ADCs, a 16-bit calculation engine,
EEPROM and a flexible two-wire I2C interface.
An integrated low-drift voltage reference with
10 ppm/°C in addition to 94.5 dB of signal-to-noise and
distortion ratio (SINAD) performance on each
measurement channel allows for better than 0.1%
accurate designs across a 4000:1 dynamic range.
Package Types
1
25
2
3
4
5
8 9 10 11 12
20
18
17
28 27 26 24
EVENT
NC
COMMONB
COMMONA
NC
NC
NC
AVDD
A0
RESET
DVDD
DGND
MCLR
EP
29
6
7
OSCI
OSCO
13 14
SCL
SDA
16
15
23 22
REFIN+/OUT
ZCD
I1+
I1-
V1-
V1+
AN_IN
AGND
DGND
A1
DR
MCP39F521
5x5 QFN*
*Includes Exposed Thermal Pad (EP); see Table 3-1.
19
21
I2C Power Monitor with Calculation and Energy Accumulation
MCP39F521
DS20005442A-page 2 2015 Microchip Technology Inc.
Functional Block Diagram
24-bit Delta-Sigma
Multi-Level
+
-
SINC3
Digital Filter
Modulator ADC
PGA
I1+
I1-
24-bit Delta-Sigma
Multi-Level
+
-
SINC3
Digital Filter
Modulator ADC
PGA
V1+
V1-
16-BIT
CORE
Calculation
Engine
(CE) Digital Outputs
I2C
Serial
Interface SCL
SDA
EVENT
FLASH
10-bit SAR
ADC
AN_IN
OSCI
OSCO
Timing
Generation
Internal
Oscillator
Generation
AVDD AGND DVDD DGND
ZCD
A0
A1
2015 Microchip Technology Inc. DS20005442A-page 3
MCP39F521
MCP39F521 Typical Application – Single-Phase, Two-Wire Application Schematic
DGND
OSCO
OSCI
DVDD RESET
AVDD
I1+
I1-
V1-
V1+
NC
NC
NC
REFIN/OUT+
AGND
COMMONA,B
NC
LOAD
+3.3V
NL
MCP1754
+3.3V
AGND
DGND
+
-
33 nF
33 nF
33 nF
1 k
1 k
1 k
499 k
1 k
4 MHz
22 pF 22 pF
33 nF
0.01 µF
0.47 µ F 470
470 µF
10
1 µF 0.1 µF 0.1 µF
0.1 µF
AN_IN
2 m
Leave Floating
N.C.
MCP9700A
(OPTIONAL)
+3.3V
to MCU SCL
SDA
SCL
DR (OPTIONAL)
Connect on PCB
EVENT
ZCD
MCP39F521
499 k
to MCU SDA
A1
A0
To DVDD or GND, do not float
IsolationIsolation
Note: The external sensing components shown here, a 2 m shunt, two 499 k and 1 k resistors for the
1000:1 voltage divider, are specifically chosen to match the default values for the calibration registers
defined in Section 6.0, Register Descriptions. By choosing low-tolerance components of these
values (e.g. 1% tolerance), measurement accuracy in the 2-3% range can be achieved with zero
calibration. See Section 8.0, MCP39F521 Calibration for more information.
To DVDD or GND, do not float
3.3 DVDD
2 k
3.3 DVDD
2 k


Produktspezifikationen

Marke: Microchip
Kategorie: Nicht kategorisiert
Modell: MCP39F521

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