PM9102AP [SAMES]

SINGLE PHASE POWER/ENERGY METERING MODULE; 单相功率/电能计量模块


型号：	PM9102AP
厂家：	SAMES
描述：	SINGLE PHASE POWER/ENERGY METERING MODULE 单相功率/电能计量模块
文件：	总10页 (文件大小：107K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SA9102 / SA9602 APPLICATION NOTE

sa m e s

PM9102AP

SINGLE PHASE POWER/ENERGY METERING MODULE

PULSE OUTPUT

FEATURES

Total power consumption rating below

500mW (excluding current sensing)

Performs both power and energy

measurement

Meets the accuracy requirements for

Class 1 AC Watt hour meters

Usesashuntresistorforcurrentsensing

Operatesoverawidetemperaturerange

Protected against ESD

DESCRIPTION

The SAMES single phase power/energy metering module, the PM9102AP, provides two

pulse rate output options, the frequency of which are proportional to the active power

consumption.

Energy consumption is determined by the power measurement being integrated over

time.

The method of calculation takes the power factor into account.

The output of this innovative universal power/energy metering circuit is ideally suited for

energy calculations in applications using a µ-controller or mechanical counter.

The application utilises the SAMES SA9102CP, SA9102FP, SA9102HP, SA9602EP

(DIP-20), SA9602HP (DIP-20) or SA9602MP power metering integrated circuits for

power measurement.

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.

BLOCK DIAGRAM

NEUTRAL

SHUNT

OUT

SA9102

SA9602

NEUTRAL

OCTO

COUPLER

POWER OUTPUT

NEUTRAL

LIVE

POWER

SUPPLY

POWER

METER

VOLTAGE SENSE

DR-01447

1/10

06-08-98

4308

PDS038-SA9102-001

REV.C

PM9102AP

ABSOLUTE MAXIMUM RATINGS*

Parameter

Symbol

Min

Max

540

+2.5

+125

Unit

Supply Voltage (Note 1)

Current Sense Input (Note 1)

Storage Temperature

V_AC

V_IV

T_STG

T_O

-2.5

-25

-10

°C

Operating Temperature (Note2)

+70

°C

I_MAX

800 (Note 3)

2000 (Note 4)

Max Current

through Sensor

I_MAX

Note 1:

Note 2:

Voltages are specified with reference to Live.

The SA9102 and SA9602 integrated circuits are specified to operate over the

temperature range -10°C to +70°C. The module functionality will however

depend upon the external components used.

Note 3:

Note 4:

t = 500ms

t = 1ms

*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.

ELECTRICAL CHARACTERISTICS

(Over the temperature range -10°C to +70°C, unless otherwise specified. Power

consumption figures are applicable to the PM9102APE only.)

Parameter

Symbol Min

Typ Max

Unit Condition

Supply voltage

(Continuous)

V_AC

180

230

115

265

135

PM9102APE

PM9102APA

Frequency output

FOUTX Refer to applicable IC data sheet

Power consumption¹

800

V_AC= 230V

Supply direct

from mains

5VAC supply

200

Isolation voltage²

Output transistor

collector current

V_IS

I_O

2500

Continuous

V_OL=1V

Note 1: Power consumption specifications exclude power consumed by the current

sensor.

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PM9102AP

Note 2: Isolation voltage may be specified, depending on customer requirements.

CONNECTION 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

JP1

Connection to negative side of current sensor

SA9102/SA9602 output pin selector (Jumper)

Power measurement output

SK1

FUNCTIONAL DESCRIPTION

1. Power Calculation

In the Application Circuit (Figure 2), the output current from the current sensor will

be between 0 and 16µA (0 to 80A through a shunt resistor of 625µS). The current

input stage saturates at input currents greater than18µA_RMS. 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 SA9102CP, SA9602EP (DIP-20), SA9602HP (DIP-20) and SA9602MP

integrated circuits may be adjusted to accommodate any voltage or current values.

The method of calculating external component values is described in paragraph 5

(Circuit Description).

SAMES offers evaluation module options, namely 230V/80A and 115V/80A.

The calculated power is integrated over time and converted into a corresponding

frequency. The frequency is transmitted as a pulse rate through an opto-coupler.

2. 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.

3. Power Consumption

The overall power consumption rating for this power metering application (Figure

2), is under 500mW, excluding the current sensor, if a supply is taken directly from

the mains.

4. Isolation

The pulse output is isolated from the module, which is at mains potential, via an

opto-coupler. (In the event of the use of a current transformer for current sensing,

an opto-coupler would not be required.)

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PM9102AP

5. Circuit Description

The Application Circuit (Figure 2) details the components required for the power

metering module, using a shunt resistor for current sensing.

In this application the device requires +2,5V, 0V, -2,5V DC supply.

The most important external components are:

C₁and C₂are the outer loop capacitors for the two integrated oversampling A/D

converters. The value of these capacitors is 560pF. The actual values determine

signal to noise and stability performance. The tolerance should be within ± 10%.

C₃and C₄are the inner loop capacitors of the A/D converters. The optimum value

is 3.3nF. The actual values are uncritical. Values smaller than 0.5nF and larger

than 5nF should be avoided.

R₂, R₁and RSH are the resistors defining the current level into the current sense

input. Thevaluesshouldbeselectedforaninputcurrentof16µA_RMSintotheSA9102

/ SA9602 at maximum line current.

Values for RSH of less than 200µS should be avoided.

R₁= R₂= (I_L/16µA_RMS) * RSH/2

Where

I_L

Line current

RSH = Shunt resistor/termination resistor

R₃, R₆and R₄set 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_RMS

R₇and P₇defines all on-chip bias and reference currents. With R₇+ P₇= 24kS,

optimum conditions are set. R₇+ P₇may be varied by ±10% for calibration

purposes. Any change to R₇+ P₇will affect the output quadratically.

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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PM9102AP

Figure 1: Connection Diagram

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PM9102AP

Figure 2: Application using a Shunt Resistor for Current Sensing.

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PM9102AP

Parts List for Application Circuit: Figure 2

Item

Symbol

IC-1

IC-2

Description

Detail

SA9102CP/EP/FP/HP / SA9602EP/HP/MP DIP-20

Optocoupler, 4N35

DIP-6

Diode, Silicon, 1N4148

Diode, Zener, 2.4V, 200mW

Crystal, 3.5795MHz

Resistor, 1.6kS, 1%, metal

Resistor, 1%, metal

ZD1

ZD2

XTAL

Colour burst TV

Note 1

Note 2

R3A

R3B

R10

Resistor, 1%, metal

Resistor, 1MS, ¼W, 1%, metal

Resistor, 470S, 2W, 5%, carbon

Resistor, 24k, ¼W, 1%, metal

Resistor, 22k, ¼W, 1%, metal

Trimpot, 5kS

Resistor, 680S, ¼W, 5%

Capacitor, 560pF

Capacitor, 3.3nF

Capacitor, 100nF

Multi turn

C10

C11

C13

C14

C15

JP1

RSH

Capacitor, 100nF

Capacitor, polyester

Capacitor, 100µF, 16V

Capacitor, 820nF

Note 2

Note 3

Note 1

Jumper

Shunt Resistor, 80A, 50mV (625µS)

Note 1 : Resistor (R1 and R2) values are dependant upon the selected value of R_SH.

See paragraph 5 (Circuit Description) when selecting the value for R_SH.

Note 2 : See the table below, detailing the component values for the selected voltage

standard.

Note 3 : Capacitor (C15) to be positioned as close as possible to Supply Pins

(V_DD& V_SS) of IC-1.

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PM9102AP

Item

Description

Symbol

Detail

PM9102APA

PM9102APE

230V

115V

120kS

82kS

1µF

R3A

R3B

C11

200kS

180kS

0.47µF

ORDERING INFORMATION

Part Number

PM9102APA

PM9102APE

Description

115V, 80A Module

230V, 80A Module

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PM9102AP

Notes:

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PM9102AP

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

informationcontainedhereiniscorrectasofanytimesubsequenttosuchdate. SAMESdoesnotundertaketoinform

anyrecipientofthisdocumentofanychangesintheinformationcontainedherein,andSAMESexpresslyreserves

therighttomakechangesinsuchinformation,withoutnotification,evenifsuchchangeswouldrenderinformation

containedhereininaccurateorincomplete. SAMESmakesnorepresentationorwarrantythatanycircuitdesigned

byreferencetotheinformationcontainedherein, willfunctionwithouterrorsandasintendedbythedesigner.

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,

Lynn East,

0039

33 Eland Street,

Koedoespoort Industrial Area,

Pretoria,

Republic of South Africa,

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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PM9102AP [SAMES]

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