ILA19002

ILA19002 INTEGRAL | Alldatasheet

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Technical content

Korzhenevskogo 12, Minsk, 220108, 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 SINGLE PHASE BIDIRECTIONAL POWER/ENERGY METERING IC WITH INSTANTANEOUS PULSE OUTPUT

FEATURES

• Performs bidirectional power and energy measurement
• Meets the IEC 521/1036 Specification requirements for Class 1 AC Watt hour meters
• Protected against ESD
• Total power consumption rating below 25 mW
• Adaptable to different types of current sensors
• Operates over a wide temperature range
• Precision voltage reference on-chip FUNCTIONAL DESCRIPTION: The ILA19002 Single Phase Bidirectional Power/Energy metering integrated circuit generates a pulse rate output, the frequency of which is proportional to the power consumption. The ILA19002 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. This universal single phase bidirectional power/energy metering integrated circuit is ideally suited for energy calculation in applications such as residential municipal metering and factory energy metering and control. The ILA19002 Single Phase Bidirectional Power/Energy metering integrated circuit is a CMOS mixed signal Analog/Digital integrated circuit, which performs 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 1-phase power and energy measurement such as two 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 ILA19002 Single Phase Bidirectional Power/Energy metering integrated circuit generates pulses, the frequency of which is proportional to the power consumption. The pulse rate follows the instantaneous power consumption measured. Direction information is also provided. A voltage zero crossover signal, relevant to the positive going half cycle, is available on pin FMO. This signal can be used to synchronise circuit breaker switching. IC is available in both 14 and 20 pin dual-in-plastic (DIP-14/DIP-20), as well as 20 pin small outline (SOIC-20) package types.

Korzhenevskogo 12, Minsk, 220108, 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 FREQU- ENCY POWER INTEGRATOR ANALOG SIGNAL PROCESSING OSC TIMING VOLTAGE REF. VSS VDD IVP FOUT IIP IIN FMO DIR OSC1 OSC2 GND VREF 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 * 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.

Korzhenevskogo 12, Minsk, 220108, 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

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 Unit Condition Operating Temperature Ranges TO -25 +85 Supply Voltage: Positive VDD 2.25 2.75 V Supply Voltage: Negative VSS -2.75 -2.25 V Supply Current: Positive IDD mA Supply Current: Negative ISS mA Current Sensor Inputs (Differential) Input Current Range III -25 +25 µA Peak value Voltage Sensor Inputs (Asymmetrical ) Input Current Range IIV -25 +25 µA Peak value Pins FOUT, FOUT2 Output Low Voltage Output High Voltage VOL VOH VDD-1 VSS+1 V V IOL=5 mA IOH=-2 mA Pulse Rate FOUT fp 1160 3000 Hz Hz Specified linearity Min and max limits Pulse Width tp tPP tPN 71:55 143.1 µs µs Positive Energy Flow Negative Energy Flow Pin VREF Ref. Current Ref. Voltage -IR VR 1.1 1.3 µA V With R = 24 kΩ connected to VSS Referred to VSS Oscillator Recommended crystal: TV colour burst crystal, f=3.5795 MHz

Korzhenevskogo 12, Minsk, 220108, 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

14 Pin 20 Pin

Description

Connection for current setting resistor TEST Test Pin. Tie to VSS for protection against HV transients and noise OSC1 Connections for crystal or ceramic resonator OSC2 (OSC1=Input; OSC2=Output) FOUT Pulse rate output DIR Direction indication output FMO Rising edge of mains frequency TP4 Test pins (Leave unconnected) TP5 TP6 TP9 TP12 TP16 TP17 TP18 Note: arrangement of pins according to analog SA9602H (Sames)

Korzhenevskogo 12, Minsk, 220108, 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 FUNCTIONAL DESCRIPTION The ILA19002 is a CMOS mixed signal Analog/Digital integrated circuit, which performs power/energy calculations across a power range of 1000:1, to an overall accurancy of better than Class 1. The integrated circuit includes all the required functions for 1-phase power and energy measurement such as two 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 ILA19002 generates pulses, the frequency of which is proportional to the power consumption. The pulse rate follows the instantaneous power consumption measured. Direction information is also provided. A voltage zero crossover signal, relevant to the positive going half cycle, is available on pin FMO. This signal can be used to synchronise circuit breaker switching. 1. Power Calculation In the Application Circuit (Figure 1), the voltage drop across the shunt will be between 0 and 16mV RMS (0 to 80A through a shunt resistor of 200µΩ). This voltage is converted to a current of between 0 and 16µA RMS , by means of resistors R 1 and R 2 . The current sense input saturates at an input current of ±25µA peak. For the voltage sensor input, the mains voltage (230VAC) is divided down through a divider to 14V. The current into the A/D converter input is set at 14µA RMS at nominal mains voltage, via resistor R4 (1MΩ). In this configuration, with a mains voltage of 230V and a current of 80A, the output frequency of the ILA19002 power meter chip at FOUT is 1.16kHz. In this case 1 pulse will correspond to an energy consumption of 18.4kW/1160Hz = 15.9Ws. 2. Analog Input Configuration The input circuitry of the current and voltage sensor inputs are illustrated below. These inputs are protected against electrostatic discharge through clamping diodes. The feedback loops from the outputs of the amplifiers A I and A V generate virtual shorts on the signal inputs. Exact duplications of the input currents are generated for the analog signal processing circuitry. 3. Electrostatic Discharge (ESD) Protection The ILA19002 integrated circuit's inputs/outputs are protected against ESD 4. Power Consumption The power consumption rating of the ILA19002 integrated circuit is less than 25mW. 5. Pulse Output Signals The diagram below shows the behavior of the instantaneous pulse output, FOUT, with respect to the power consumption.

Korzhenevskogo 12, Minsk, 220108, 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 Pulse Output Signals The diagram below shows the behavior of the instantaneous pulse output, FOUT, with respect to the power consumption. t t t VMAINS POWER V FOUT tP

Korzhenevskogo 12, Minsk, 220108, 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 diagram below shows the behavior of the direction indicator, DIR, when energy reversal takes place. The timing period for the DIR signal to change state, tDIR, will be defined by the time it takes for the integrator to count down from its value at the time of energy reversal. This is determined by the energy consumption rate. s t s t s tDIR V I DIR The square wave signal on FMO indicates the polarity of the mains voltage.

Korzhenevskogo 12, Minsk, 220108, 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 V FMO t tMAINS t Due to comparator offset, the FMO low to high transition can be occur within a range as shown above. The time between successive low to high transitions will be equal to the mains voltage period. TYPICAL APPLICATIONS In the Application Circuits (Figures 1 and 2), the components required for power metering applications, are shown. In Figure 1 a shunt resistor is used for current sensing. In this application, the circuitry requires a +2.5V, 0V, -2.5V DC supply. In the case of Figure 2, when using a current transformer for current sensing, a +5V, 0V DC supply is sufficient. The most important external components for the ILA19002 integrated circuit are: R2, R1 and RSH are the resistors defining the current level into the current sense input. The values should be selected for an input current of 16µARMS into the ILA19002 at maximum line current. Values for RSH of less than 200µΩ should be avoided. R 1 = R 2 = (I L /16µA)RMS * RSH /2 Where I L = Line current RSH = Shunt resistor/termination resistor R3, R6 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 14µARMS. R7 defines all on-chip bias and reference currents. With R7 = 24kΩ, optimum conditions are set. R7 may be varied within ±10% for calibration purposes. Any change to R7 will affect the output quadratically (i.e.: R7 = +5%, fP = +10%). The formula for calculating the output frequency is given below: R V I I I I MHz FOSC FOUTX f Where FOUTX = Normal rated frequency (1160Hz)

Korzhenevskogo 12, Minsk, 220108, 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 II = Input current for current input (16µARMS at rated) IV = Input current for voltage input (14µARMS 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 1.7897 MHz on-chip, to supply the digital circuitry and the A/D converters. Figure 1: Application Circuit using a Shunt Resistor for Current Sensing. R10 C14 ZD2 C13 ZD1 XTAL C15 C10 C11 R S H SUPPLY LOAD R11 LED NC NC IC-1 IC-2

Korzhenevskogo 12, Minsk, 220108, 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 Diode, Silicon, 1N4148 Diode, Silicon, 1N4148 ZD1 Diode, Zener, 2.4V, 200mW ZD2 Diode, Zener, 2.4V, 200mW XTAL Crystal, 3.5795MHz Colour burst TV Resistor, 1% metal Note 1 Resistor, 1% metal Note 1 Resistor, 390k, (230VAC) 1%, metal Resistor, 1M, 1/4W, 1%, metal Resistor, 470W, 2W, 5%, carbon Resistor, 24k, 1/4W, 1%, metal Resistor, 24k, 1/4W, 1%, metal Resistor, 680W, 1/4W, 1% Resistor, 680W, 1/4W, 1% R10 Resistor, 680W, 1/4W, 1% R11 Resistor, 2.2K, 1/4W, 1% Capacitor, 100nF C10 Capacitor, 100nF C11 Capacitor, 0.47µF, 250VAC, polyester C13 Capacitor, 100µF C14 Capacitor, 100µF C15 Capacitor, 820nF Note 2 RSH Shunt Resistor Note 3 LED Light Emitting Diode Note 1: Resistor (R1 and R2) values are dependant upon the selected value of RSH. Note 2: Capacitor (C15) to be positioned as close to Supply Pins (VDD & VSS ) of IC-1 as possible. Note 3: See TYPICAL APPLICATIONS when selecting the value of RSH.

Korzhenevskogo 12, Minsk, 220108, 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 2: Application Circuit using a Current Transformer for Current Sensing. R1 = R2 L N 2.4V TO 2.6V DC XTAL C10 IC-1 0 V 5 V CT RSH = TERMINATION RESISTOR FOR CURRENT TRANSFORMER SUPPLY LOAD RSH FOUT DIR FMO C11

Korzhenevskogo 12, Minsk, 220108, 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 2 Item Symbol Crystal, 3.5795MHz Colour burst TV RSH Resistor Note 1 Resistor, 1%, metal Note 2 Resistor, 1%, metal Note 2 Resistor, 390k, (230VAC), 1%, metal Resistor, 1M, 1/4W, 1%, metal Resistor, 24k, 1/4W, metal Resistor, 24k, 1/4W, 1%, metal Resistor, 2.2k, 1/4W, 1%, metal Resistor, 2.2k, 1/4W, 1%, metal Capacitor, 820nF Note 3 C10 Capacitor, 100nF C11 Capacitor Note 4 CT Current transformer Note 1: See TYPICAL APPLICATIONS when selecting the value of RSH. Note 2: Resistor (R1and R2) values are dependant upon the selected value of RSH. Note 3: Capacitor (C9) to be positioned as close to Supply Pins (VDD & VSS) of IC-1, as possible. Note 4: Capacitor (C11) selected to minimize phase error introduced by current transformer (typically 1.5µF).