PM9106APE [SAMES]
SINGLE PHASE WATT MEASUREMENT MODULE WITH A 5 DIGIT LED DISPLAY; 以5位LED显示单相电能测量模块
| 型号： | PM9106APE |
| 厂家： | 
SAMES |
| 描述： | SINGLE PHASE WATT MEASUREMENT MODULE WITH A 5 DIGIT LED DISPLAY |
| 文件： | 总10页 (文件大小：142K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SA9106 APPLICATION NOTE
sames
PM9106AP
SINGLE PHASE WATT MEASUREMENT MODULE
WITH A 5 DIGIT LED DISPLAY
FEATURES
n
Performs power measurement and di-
rectly drives a 5 digit (7 segment) LED
display
n
n
n
Uses a shunt resistor or for current
sensing
Operates over a wide temperature
range
n
n
n
Accuracy better than 1% (± 1 count)
Protected against ESD
Precision voltage reference on-chip
Total power consumption rating below
800mW
DESCRIPTION
The SAMES single phase Watt measurement module, the PM9106AP includes an on-
board 5 digit (7 segment) Light Emitting Diode (LED) display. Active power is directly
displayed in watts, with a full scale of 20 000 watts.
The measured power is updated approximately every 2 seconds, giving an average
power reading for this period.
This method of calculation takes the power factor into account.
This innovative universal Watt measurement module is ideally suited for the display of
the measured power in single phase, industrial and domestic power measurement
applications.
The application utlises the SAMES SA9106AP single phase Watt measurement
integrated circuit for power measurement and display.
As a safety measure, this application shows the current sensor connected to the neutral
line. In practice, the live line may be used for current sensing, provided that the supply
connections (MAINS) are reversed on the module.
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4358
PDS038-SA9106-001
REV. A
06-09-1995
PM9106AP
BLOCK DIAGRAM
NEUTRAL IN
SHUNT
NEUTRAL OUT
SA9106A
WATT
METER
IC
5-DIGIT
LED
NEUTRAL
(Mains)
LIVE
POWER
SUPPLY
DISPLAY
DR-00913
ABSOLUTE MAXIMUM RATINGS*
Parameter
Symbol
Min
Max
540
+2.5
+125
+70
Unit
V
V
°C
°C
Supply Voltage (Note 1)
Current Sense Input (Note 1)
Storage Temperature
Operating Temperature (Note2)
VAC
VIV
TSTG
TO
-2.5
-25
-10
Note 1:
Note 2:
Voltages are specified with reference to Live.
TheSA9106APintegratedcircuitisspecifiedtooperateoverthetemperature
range -10°C to +70°C. The module functionality will however depend upon
the external components used.
*Stresses above those listed under “Absolute Maximum Ratings” may cause permanent
damage to the device. This is a stress rating only. Functional operation of the device
at these or any other conditions above those indicated in the operational sections of this
specification, is not implied. Exposure to Absolute Maximum Ratings for extended
periods may affect device reliability.
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PM9106AP
ELECTRICAL CHARACTERISTICS
(Over the temperature range -10°C to +70°C, unless otherwise specified.)
Parameter
Supply Voltage
Symbol Min
VAC 180
Typ Max
Unit Condition
230
265
V
Continuous
operation
VAC = 230V
Power Consumption1
800
mW
Note 1: Power consumption specifications exclude power consumed by the current
sensor.
Note 2: Isolation voltage may be specified, depending on customer requirements.
PIN DESCRIPTION
Designation
Description
MAINS
Voltage supply connection to Neutral line
Voltage supply connection to Live line
Connection to positive side of current sensor
NEUTRAL IN
NEUTRAL OUT
Connection to negative side of current sensor
FUNCTIONAL DESCRIPTION
1. Power Calculation
In the Application Circuit (see Figure 2), the output current from the current sensor
willbebetween0and16µA(0to80Athroughashuntresistorof625µΩ). Thecurrent
input stage saturates at input currents greater than18µARMS. The mains voltage
(230V + 15% -20%) is used to supply the circuitry with power and for the power
calculation, together with the current information from the current sensor (shunt
resistor).
The SA9106AP integrated circuit may be adjusted to accomodate any voltage or
current values. The method of calculating external component values is described
in paragraph 5 (Circuit Description).
SAMES offers two evaluation module options, namely 230V/80A and 115/80A.
Thecalculatedpowerisdirectlydisplayedona5digit(7segment)LEDdisplay. The
update interval is approximately every 2 seconds.
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PM9106AP
2. LED Display
The PM9106AP has an on-board LED display comprising 5 (7 segment) common
cathode digits, as well as a sign LED.
The sign LED is addressed by DIG [5], the most significant digit by DIG [4] and the
least significant digit by DIG [0].
The position of the segments a, b, c, d, e, f and g are given in the diagram below:
a
f
b
.
.
g
e
c
d
h
DR-00914
Thefullscalepowerdisplayedis20000watts. Anoverflowisindicatedbyaflashing
display.
3. Electrostatic Discharge (ESD) Protection
The device's inputs/outputs are protected against ESD according to Mil-Std 883C,
method 3015. The modules resistance to transients will be dependant upon the
protection components used.
4. Power Consumption
Theoverallpowerconsumptionratingforthispowermeteringapplication(Figure2),
is under 800mW, excluding the current sensor.
5. Circuit Description
The Application Circuit (Figure 2) shows the components required for the Watt
measurement module, using a shunt resistor for current sensing.
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PM9106AP
The most important external components for the SA9106AP device are:
C1 and C2 are the outer loop capacitors for the two integrated oversampling A/D
converters. The value of these capacitors is 560pF.
Theactualvaluesdeterminesignaltonoiseandstabilityperformance. Theoptimum
tolerances should be within ± 10%.
C3 and C4 are the inner loop capacitors of the A/D converters. The optimum value
is3.3nF. Theactualvaluesareuncritical. Valuessmallerthan0.5nFandlargerthan
5nF should be avoided.
R2,R1 andRSH aretheresistorsdefiningthecurrentlevelintothecurrent senseinput.
The values should be selected for an input current of 16µARMS into the SA9106AP
at rated line current.
Values for RSH of less than 200µΩ should be avoided.
R1 = R2 = (IL/16µARMS) * RSH/2
Where
IL
RSH
=
=
Line current
Shunt resistor/termination resistor
R3, R5 and R4 set the current for the voltage sense input. The values should be
selected so that the input current into the voltage sense input (virtual ground) is set
to 14µA.
R7 defines all on-chip bias and reference currents. With R7 = 24kΩ, optimum
conditions are set.
XTAL is a colour burst TV crystal (f = 3.5795MHz) for the oscillator. The oscillator
frequency is divided down to 1.7897MHz on-chip and supplies the A/D converters
and the digital circuitry.
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Figure 1: Connection Diagram
D R - 0 0 9 1 5
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Figure 2: Application Circuit.
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Parts List for Application circuit: Figure 2
Item Symbol Description
Detail
1
2
3
4
5
6
7
8
9
IC-1 SA9106A
IC-2 5V 100mA Voltage Regulator
DIP-40
IC-3 ELS-511 HWB, Common cathode 7 segment read-out
IC-4 ELS-511 HWB, Common cathode 7 segment read-out
IC-5 ELS-511 HWB, Common cathode 7 segment read-out
IC-6 ELS-511 HWB, Common cathode 7 segment read-out
IC-7 ELS-511 HWB, Common cathode 7 segment read-out
BR
W04M, Bridge Rectifier
SIGN Red LED, 3mm diameter, high bright
10 XTAL Crystal, 3.5795 MHz
Colour burst TV
Note 1
Note 1
Note 2
Note 2
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
R1
R2
Resistor, 1% metal
Resistor, 1% metal
R3A Resistor, 1% metal
R3B Resistor, 1% metal
R4
Resistor, 1M, 1/4W, 1% metal
Resistor, 24k, 1/4W, 1%, metal
R5
R7A Resistor, 820 Ω, 1/4W, 1%, metal
R7B Resistor, 820 Ω, 1/4W, 1%, metal
R8
R9
Resistor, 50Ω (Segment G)
Resistor, 50Ω (Segment F)
Note 3
Note 3
Note 3
Note 3
Note 3
Note 3
Note 3
R10 Resistor, 50Ω (Segment E)
R11 Resistor, 50Ω (Segment D)
R12 Resistor, 50Ω (Segment C)
R13 Resistor, 50Ω (Segment B)
R14 Resistor, 50Ω (Segment A)
R1
P6
C1
C2
C3
C4
C6
C7
C8
C9
Resistor, 50Ω,114W
Trimpot, 5k
Capacitor,560pF
Capacitor, 560pF
Capacitor, 3.3nF
Capacitor, 3.3nF
Capacitor, 1000µF.16V, Electrolytic
Capacitor, 100nF
Capacitor, 100nF
Capacitor, 100nF
Multi-turn
C15 Capacitor, 820nF
Note 4
Note 5
37 TRANS 110V x 2 to 2.7V, 1.5VA Transformer
38
RSH Shunt Resistor
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Note 1: Resistor (R1 and R2) values are dependant upon the selected value of RSH.
Note 2: See the table below, detailing the component values for the selected voltage
standard.
Note 3: Resistors (R8 to R14) are current limiting resistors required to set the intensity
of the LED display segments.
Note 4: Capacitor (C5) to be positioned as close to Supply Pins (VDD & VSS) of IC-1 as
possible.
Note 5: See TYPICAL APPLICATIONS when selecting the value of RSH.
Description
Item
Symbol
PM9106APA
115V
PM9106APE
230V
Detail
13
14
R3A
R3B
120kΩ
82kΩ
200kΩ
180kΩ
ORDERING INFORMATION
Part Number
Description
PM9106APA
PM9106APE
115V, 80A Module
230V, 80A Module
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Disclaimer:
TheinformationcontainedinthisdocumentisconfidentialandproprietarytoSouthAfricanMicro-
Electronic Systems (Pty) Ltd ("SAMES") and may not be copied or disclosed to a third party, in whole or in part,
without the express written consent of SAMES. The information contained herein is current as of the date of
publication; however,deliveryofthisdocumentshallnotunderanycircumstancescreateanyimplicationthat the
information contained herein is correct as of any time subsequent to such date. SAMES does not undertake to
informanyrecipientofthisdocumentofanychangesintheinformationcontainedherein, andSAMESexpressly
reserves the right to make changes in such information, without notification,even if such changes would render
information contained herein inaccurate or incomplete. SAMES makes no representation or warranty that any
circuit designed by reference to the information contained herein, will function without errors and as intended by
thedesigner.
Any Sales or technical questions may be posted to our e-mail address below:
energy@sames.co.za
For the latest updates on datasheets, please visit out web site:
http://www.sames.co.za
South African Micro-Electronic Systems (Pty) Ltd
P O Box 15888,
33 Eland Street,
Lynn East, 0039
Republic of South Africa,
Koedoespoort Industrial Area,
Pretoria,
Republic of South Africa
Tel:
Fax:
012 333-6021
012 333-8071
Tel:
Fax:
Int +27 12 333-6021
Int +27 12 333-8071
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