IL19006

IL19006 INTEGRAL | Alldatasheet

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Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61, 277 69 16 E-mail: office@bms.by URL: www.bms.by THREE PHASE POWER/ENERGY METERING IC WITH INSTANTANEOUS PULSE OUTPUT

FEATURES

• Output frequency represents the absolute sum of energy on all three phases
• Performs one, two or three phase power and energy measurement
• Meets the IEC 521/1036 Specification requirements for Class 1 AC Watt hour meters
• Operates over a wide temperature range
• Current transformers for sensing
• Excellent long term stability
• Easily adaptable to different signal levels
• Precision voltage reference on- chip
• Pin selectable pulse rates
• Support tamper detection FUNCTIONAL DESCRIPTION: The IL19006 Three Phase Power/Energy metering integrated circuit generates a pulse rate output, the frequency of which is proportional to the absolute power consumption. The IL19006 performs the calculations of active power. The method of calculation takes the power factor into account. Energy consumption is determined by the power measurement being integrated over time. The output of this universal three phase power/energy metering integrated circuit, is ideally suited for applications such as residential and industrial energy metering and control. The IL19006 Three Phase Power/Energy metering integrated circuit is a CMOS mixed signal Analog/Digital integrated circuit, which performs three phase power/energy calculations over a range of 1000:1, to an overall accuracy of better than Class 1. The integrated circuit includes all the required functions for 3-phase power and energy measurement such as oversampling A/D converters for the voltage and current sense inputs, power calculation and energy integration. Internal offsets are eliminated through the use of cancellation procedures. The IL19006 generates pulses, the frequency of which is proportional to the power consumption. Two frequency outputs (FOUT1 and FOUT2) are available. The pulse rate follows the instantaneous power measured.

Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 212 24 70, 212 24 61, 212 69 16 E-mail: office@bms.by URL: www.bms.by BLOCK DIAGRAM POWER TO PULSE RATE INTEG. AVERAGE ANALOG SIGNAL PROCESSING OSC TIMING & CONTROL VREF VSS PGM1 PGM0 VDD IVN2 IVN1 IVN3 FOUT1 IIP1 FOUT2 IIN1 DIR OSC1 OSC2 IIP2 IIN2 IIN3 IIP3 GND VREF

Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 212 24 70, 212 24 61, 212 69 16 E-mail: office@bms.by URL: www.bms.by ABSOLUTE MAXIMUM RATINGS* Parameter Symbol Min Max Unit Supply Voltage VDD -VSS -0.3 6.0 V Current on any Pin IPIN -150 +150 mA Storage Temperature TSTG -40 +125 Operating Temperature TO -40 +85 Current at any pin Ip -100 100 mA * 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 operation sections of this specification, is not implied. Exposure to Absolute Maximum Ratings for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VDD=2.5V, VSS=-2.5V, over the temperature range -10°C to +70°C, unless otherwise specified.) Parameter Symbol Min Typ Maxf Uni Condition Operating Temperature Ranges TO -25 +85 Supply Voltage VDD-VSS 4.5 5.5 V Supply Current IDD mA Nonlinearity of Power Calculation -0.3 +0.3 % 1%-100% of rated power Current Sensor Inputs (Differential) Input Current Range III -25 +25 µA Peak value Voltage Sensor Inputs (Asymmetric) Input Current Range IIV -25 +25 µA Peak value Pins FOUT1, FOUT2, DIR Output Low Voltage Output High Voltage VOL VOH VDD-1 VSS+1 V V IOL=5 mA IOH=-2 mA Pulse Rate: FOUT1 fp 1160 3000 Hz Hz Specified linearity Min and max limits FOUT2 User selectable Oscillator Recommended crystal: TV colour burst crystal, f=3.5795 MHz Pin VREF Ref. Current Ref. Voltage -IR VR 1.1 1.3 µA V With R = 24 kΩ connected to VSS Referred to VSS

Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 212 24 70, 212 24 61, 212 69 16 E-mail: office@bms.by URL: www.bms.by PIN DESCRIPTION Pin Designation

Description

Analog Input for Voltage: Phase 1 IVN2 Analog Input for Voltage: Phase 2 IVN3 Analog Input for Voltage: Phase 3 IIN1 Inputs for current sensor-: Phase 1 IIP1 IIN2 Inputs for current sensor : Phase 2 IIP2 IIN3 . Inputs for current sensor: Phase 3 IIP3 OSC1 Connections for crystal or ceramic resonator OSC2 (OSC1=Input; OSC2=Output) FOUT1 Pulse rate outputs FOUT2 . DIR Direction indicator PGM0 FOUT2 Frequency select pins PGM1 VREF Connection for current setting resistor Note: arrangement of pins according to analog SA9605A (Sames) FUNCTIONAL DESCRIPTION The IL19006 is a CMOS mixed signal Analog/Digital integrated circuit, which performs three phase power/energy calculations over a range of 1000:1, to an overall accuracy of better than Class 1. The IL19006 in both DIP-20 and SOIC-20 package options is functionally similar to the SA9105E and SA9105F with the advantage of no external loop capacitors. The integrated circuit includes all the required functions for 3-phase power and energy measurement such as oversampling A/D converters for the voltage and current sense inputs, power calculation and energy integration. Internal offsets are eliminated through the use of cancellation procedures. The IL19006 generates pulses, the frequency of which is proportional to the power consumption. Two frequency outputs (FOUT1 and FOUT2) are available. The pulse rate follows the instantaneous power measured. 1. Power Calculation In the Application Circuit (Figure 1), the mains voltages from Line 1, Line 2 and Line 3, are converted to currents and applied to the voltage sense inputs IVN1, IVN2 and

Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 212 24 70, 212 24 61, 212 69 16 E-mail: office@bms.by URL: www.bms.by IVN3. The current levels on the voltage sense inputs are derived from the mains voltage (3 x 230 VAC) being divided down through voltage dividers to 14V. The resulting input currents into the A/D converters are 14µA through the resistors R15, R16 and R17. For the current sense inputs the voltage drop across the current transformers terminating resistors are converted to currents of 16µA for rated conditions, by means of resistors R8, R9 (Phase 1); R10, R11 (Phase 2); and R12, R13 (Phase 3). The signals providing the current information are applied to the current sensor inputs: IIN1, IIP1; IIN2, IIP2; and IIN3, IIP3. In this configuration, with the mains voltage of 3 x 230 V and rated currents of 80A, the output frequency of the IL19006 energy metering integrated circuit at FOUT1 is 1.16kHz. In this case 1 pulse will correspond to an energy consumption of 3 x 18.4 kW/1160Hz = 47.6 Ws. The output frequency at FOUT1 and FOUT2 represents the absolute sum of the energy measured on all three phases, regardless of the direction of energy flow through the current sensors. This measurement method will assist meter manufacturers to circumvent meter tampering by reversal of the phases. 2. Analog Input Configuration The current and voltage sensor inputs are illustrated below. These inputs are protected against electrostatic discharge through clamping diodes, in conjunction with the amplifiers input configuration. The feedback loops from the outputs of the amplifiers AI and AV generate virtual shorts on the signal inputs. Exact duplications of the input currents are generated for the analog processing circuitry.

Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 212 24 70, 212 24 61, 212 69 16 E-mail: office@bms.by URL: www.bms.by 3. Electrostatic Discharge (ESD) Protection The IL19006 integrated circuit's inputs/outputs are protected against ESD. 4. Power Consumption The overall power consumption rating of the IL19006 integrated circuit is less than 75mW with a 5V supply. 5. Pulse Output Signals Waveforms displaying the DIR and FOUT1 signal information for each of the three phases are shown below.

Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 212 24 70, 212 24 61, 212 69 16 E-mail: office@bms.by URL: www.bms.by FOUT1 DIR FOUT1 DIR FOUT1 DIR FOUT1 DIR FOUT1 DIR FOUT1 DIR PHASE 1, POSITIVE PHASE 1, NEGATIVE PHASE 2, POSITIVE PHASE 2, NEGATIVE PHASE 3, POSITIVE PHASE 3, NEGATIVE 8.94 µs 8.94 µs 71.55 µs These waveforms demonstrate how to establish the direction of energy flow as well as the phase from which the energy is measured. The direction of energy indicated on pin DIR is HIGH for POSITIVE energy flow and LOW for NEGATIVE energy flow, for the entire LOW period of the FOUT1 pulse. The phase to which the direction indication on the DIR pin refers can be ascertained by counting the number of falling edges on the DIR pin prior to the falling edge of the FOUT1 pulse. The supervision of the DIR pin can be accomplished with a µController. Although FOUT1 has a fixed frequency output, the table below shows the various frequencies selectable for rated condition on FOUT2. User Selectable Output Frequency PGM1 PGM0 FOUT2 (Hz) 5.11 3.83 2.55 N/A The frequencies shown in the above table were chosen to allow a 4-3-2 scaling ratio for

Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 212 24 70, 212 24 61, 212 69 16 E-mail: office@bms.by URL: www.bms.by rated conditions. This facility provides ease of interface with applications which use the same post divider with mechanical counter or unchanged microcontroller software for different current rated kWh meters. For example, a meter manufacturer may wish to build meters for 3 system configurations with rated current loading of 80ARMS , 60ARMS and 40ARMS. The rated line voltage is 230VRMS. FOUT1 Frequency Consider the case where FOUT1 is the output of the energy counting block. For each of the three rated conditions, the input current sensing resistors are chosen to ensure that 16µARMS flows into the current sensing pins. Case 1 IL = 80ARMS 1 pulse on FOUT1 = (80*230*3)/1160 = 47.6Ws Case 2 IL = 60ARMS 1 pulse on FOUT1 = (60*230*3)/1160 = 35.7Ws Case 3 IL = 40ARMS 1 pulse on FOUT1 = (40*230*3)/1160 = 23.8Ws The amount of energy represented by one pulse for each of the three cases is different. In addition to changing the current sensing resistor network, the energy counting block must also be altered. FOUT2 Frequency Now consider the advantage of the user selectable frequency available on FOUT2. Again the input current sensing resistors must be chosen to ensure that 16µA RMS flows into the current sensing pins. Case 1 IL = 80ARMS, PGM1 = 0 PGM0 = 0 1 pulse on FOUT2 = (80*230*3)/5.11 = 10.8kWs Case 2 IL = 60ARMS, PGM1 = 0 PGM0 = 1 1 pulse on FOUT2 = (60*230*3)/3.83 = 10.8kWs Case 3 IL = 40ARMS, PGM1 = 1 PGM0 = 0 1 pulse on FOUT2 = (40*230*3)/2.55 = 10.8kWs The only changes which now have to be implemented to interface the device to different rated systems are: change the current sense resistors; and select the required PGM0 and PGM1. No change to the post divider or micro-controller software is required if the FOUT2 pin is used as described. TYPICAL APPLICATION In the Application Circuit (Figure 1), the components required for a three phase power metering application are shown. Terminated current sensors (current transformers) are connected to the current sensor inputs of the IL19006 through current setting resistors (R8..R13).

Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 212 24 70, 212 24 61, 212 69 16 E-mail: office@bms.by URL: www.bms.by The resistor values for standard operation are selected for an input current of 16µA into the IL19006, at the rated line current. The values of these resistors are calculated as follows: Phase 1: R8= R9= (IL1 /16µA) * R18/2 Phase 2: R10 = R11 = (IL2 /16µA) * R19/2 Phase 3: R12 = R13 = (IL3 /16µA) * R20/2 Where ILX = Secondary CT current at rated conditions. R18, R19 and R20 = Current transformer termination resistors for the three phases. R1+R1A, R4 and R15 set the current for the phase 1 voltage sense input. R2+R2A, R5+P5 and R16 set the current for phase 2 and R3+R3A, R6+P6 and R17 set the current for phase 3. The values should be selected so that the input currents into the voltage sense inputs (virtual ground) are set to 14µA for rated line voltage. Capacitors C1, C2 and C3 are for decoupling and phase compensation. R14+P14 defines all on-chip bias and reference currents. With R14+P14 = 24kW, optimum conditions are set. R14+P14 may be varied within ± 10% for calibration purposes. Any changes to R 14 + P 14 will affect the output quadratically The formula for calculating the Output Frequency (f) is given below: 5795 R V I V I V I I I I I I I I МГц FOSC FOUTX f Where FOUTX = Nominal rated frequency (1160Hz) FOSC II1, II2, II3 = Input currents for current inputs (16µA at rated) IV1, IV2, IV3 = Input currents for voltage inputs (14µA at rated) IR = Reference current (typically 50µA) XTAL is a colour burst TV crystal (f = 3.5795 MHz) for the oscillator. The oscillator frequency is divided down to 1.78975 MHz on-chip, to supply the digital circuitry and the A/D converters.

Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 212 24 70, 212 24 61, 212 69 16 E-mail: office@bms.by URL: www.bms.by Figure 1: Application Circuit for Three Phase Power/Energy Measurement. DIP-20 IC-1 ILA9605A MAINS VOLTAGES LINE 3 LINE 2 LINE 1 R1A R2A R3A R11 R10 R17 R13 R12 R20 R19 VI2P VI2N VI3P VI3N DIR FOUT2 FOUT1 C12 C13 P14 R21 C14 PGM0 PGM1 R14 R15 R16 R18 VI1N VI1P XTAL

Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 212 24 70, 212 24 61, 212 69 16 E-mail: office@bms.by URL: www.bms.by Parts List for Application Circuit: Figure 1 Item Symbol DIP-20, SOIC-20 XTAL Crystal, 3.5795 MHz Colour burst TV Resistor, 200k, 1%, 1/4W R1A Resistor, 180k, 1%, 1/4W Resistor, 200k, 1%, 1/4W R2A Resistor, 200k, 1%, 1/4W Resistor, 200k, 1% , 1/4W R3A Resistor, 180k, 1%, 1/4W Resistor, 24k, 1%, 1/4W Resistor, 22k, 1%, 1/4W Resistor, 22k, 1%, 1/4W Resistor, 820W, 1%, 1/4W Resistor Note 1 Resistor Note 1 R10 Resistor Note 1 R11 Resistor Note 1 R12 Resistor Note 1 R13 Resistor Note 1 R14 Resistor, 22k, 1%, 1/4W R15 Resistor, 1M, 1%, 1/4W R16 Resistor, 1M, 1%, 1/4W R17 Resistor, 1M, 1%, 1/4W R18 Resistor Note 1 R19 Resistor Note 1 R20 Resistor Note 1 R21 Resistor, 820W, 1%, 1/4W Potentiometer, 4.7k Multi turn Potentiometer, 4.7k Multi turn P14 Potentiometer, 4.7k Multi turn Capacitor, electrolytic, 1µF, 6V Note 2 Capacitor, electrolytic, 1µF, 6V Note 2 Capacitor, electrolytic, 1µF, 6V Note 2 C12 Capacitor, 820nF Note 3 C13 Capacitor, 100nF C14 Capacitor, 100nF Note 1: Resistor (R8, R9, R10, R11, R12 and R13) values are dependant upon the selected values of the current transformer termination resistors R18, R19 and R20. Note 2: Capacitor values may be selected to compensate for phase errors caused by the current transformers. Note 3: Capacitor (C12) to be positioned as close to Supply Pins (VDD & VSS) of IC-1, as possible.

Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 212 24 70, 212 24 61, 212 69 16 E-mail: office@bms.by URL: www.bms.by