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ILA19002 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 1 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/e nergy 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 pow er 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 integrat ed 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 requi red functions for 1-phase power and energy measurement such as two over sampling a/d converters for the voltage and current sense inputs, power calculation and ener gy integration. internal o ffsets are eliminated through the use of cancellation procedures. the ILA19002 single phase bidirectional power/e nergy metering integrated circuit generates pulses, the frequency of which is proportional to the power co nsumption. 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-plas tic (dip-14/dip-20), as well as 20 pin small outline (soic-20) package types.
ILA19002 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 2 block diagram power to frequ- ency power integrator analog signal processing osc timing voltage ref . v ss v dd ivp fout iip iin fmo dir osc1 osc2 gnd vref absolute maximum ratings * parameter symbol min max unit supply voltage v dd -v ss -0.3 6.0 v current on an y pin i pin -150 +150 m a stora g e tem p erature t stg -40 +125 c operating temperature t o -40 +85 c * stresses above those listed under "absolut e 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 indi cated in the operation sections of this specification, is not implied. exposure to absolute maximu m ratings for extended periods may affect device reliability.
ILA19002 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 3 electrical characteristics (v dd =2.5v, v ss =-2.5v, over the temperature range -10c to +70c, unless otherwise specified.) paramete r s y mbol min t yp maxf unit condition operating temperature ranges t o -25 +85 0 c supply voltage: positive v dd 2.25 2.75 v supply voltage: negative v ss -2.75 -2.25 v su pp l y current: positive i dd 56 m a su pp l y current: ne g ative i ss 56 m a current sensor in p uts ( differential ) input current range i ii -25 +25 s s positive energy flow negative energy flow pin vref ref. current ref. voltage -i r v r 45 1.1 50 55 1.3 a v with r = 24 k ? connected to v ss referred to v ss oscillator recommended crystal: tv colour burst crystal, f=3.5795 mhz
ILA19002 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 4 pin description 14 pin 20 pin designation description 14 20 gnd ground 5 8 v dd positive supply voltage 10 14 v ss negative supply voltage 13 19 ivp analog input for voltage 1 1 iin inputs for current sensor 2 2 iip 3 3 vref connection for current setting resistor 4 7 test test pin. tie to v ss for protection against hv transients and noise 7 11 osc1 connections for crystal or ceramic resonator 6 10 osc2 (osc1=input; osc2=output) 8 12 fout pulse rate output 9 13 dir direction indication output 11 15 fmo rising edge of mains frequency 4 tp4 test pins (leave unconnected) 5 tp5 6 tp6 9 tp9 12 tp12 16 tp16 17 tp17 18 tp18 note: arrangement of pins according to analog sa9602h (sames)
ILA19002 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 5 functional description the ILA19002 is a cmos mixed signal analog/dig ital 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 r equired 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 offset s are eliminated through the use of cancellation procedures. the ILA19002 generates pulses, the frequency of which is proportional to the power consumption. the pul se 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 200 ? ). this voltage is converted to a current of between 0 and 16a rms , by means of resistors r 1 and r 2 . the current sense input saturates at an input current of 25a 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 14a rms at nominal mains voltage, via resistor r4 (1m ?) . in this configuration, with a mains volt age 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 consumpt ion of 18.4kw/1160hz = 15.9ws. 2. analog input configuration the input circuitry of the current and vo ltage sensor inputs are illustrated below. these inputs are protected against electr ostatic discharge through clamping diodes. the feedback loops from the out puts of the amplifiers a i and a v generate virtual shorts on the signal inputs. exact duplicat ions of the input currents are generated for the analog signal processing circuitry. 3. electrostatic disch arge (esd) protection the ILA19002 integrated circuit's input s/outputs are protected against esd 4. power consumption the power consumption rating of the ila 19002 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.
ILA19002 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 6 pulse output signals the diagram below shows the behavior of the instantaneous pulse output, fout, with respect to the power consumption. t t t v mains power v fout t p
ILA19002 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 7 the diagram below shows the behavior of the dire ction indicator, dir, when energy reversal takes place. the timing period for the dir signal to change state, t dir , 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 t dir v i dir the square wave signal on fmo indicate s the polarity of the mains voltage.
ILA19002 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 8 v fmo t t mains 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: r 2 , r 1 and rsh are the resistors defining the current level into the current sense input. the values should be selected for an input current of 16a rms into the ILA19002 at maximum line current. values for rsh of less than 200 ? should be avoided. r 1 = r 2 = (i l /16a) rms * r sh /2 where i l = line current rsh = shunt resistor/termination resistor r 3 , r 6 and r 4 set the current for the voltage sense input. the values should be selected so that the input current into the voltage s ense input (virtual ground) is set to 14a rms . r 7 defines all on-chip bias and reference currents. with r 7 = 24k ? , optimum conditions are set. r 7 may be varied within 10% for calibration purposes. any change to r 7 will affect the output quadratically (i.e.: r 7 = +5%, f p = +10%). the formula for calculating the output frequency is given below: 2 58 . 3 16 . 11 r v i i i i mhz fosc foutx f ? ? ? ? = where foutx = normal rated frequency (1160hz) fosc = oscillator frequency (2mhz ...... 4mhz)
ILA19002 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 9 i i = input current for current input (16a rms at rated) i v = input current for voltage input (14a rms at rated) i r = reference current (typically 50a) 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. d1 r9 r10 d2 c14 zd2 c13 zd1 xtal c15 c9 c10 r8 r5 c11 r s h r2 r1 r7 r3 r4 supply load r6 r11 led n c n c ic-1 ic-2 4 5 6 3 2 6 7 5 4 3 2 1 1 9 8 10 11 12 13 14
ILA19002 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 10 parts list for application circuit: figure 1 item symbol description detail 1 ic-1 ILA19002 dip-14 2 ic-2 optocoupler 4n35 dip-6 3 d1 diode, silicon, 1n4148 4 d2 diode, silicon, 1n4148 5 zd1 diode, zener, 2.4v, 200mw 6 zd2 diode, zener, 2.4v, 200mw 7 xtal crystal, 3.5795mhz colour burst tv 8 r1 resistor, 1% metal note 1 9 r2 resistor, 1% metal note 1 10 r3 resistor, 390k, (230vac) 1%, metal 11 r4 resistor, 1m, 1/4w, 1%, metal 12 r5 resistor, 470w, 2w, 5%, carbon 13 r6 resistor, 24k, 1/4w, 1%, metal 14 r7 resistor, 24k, 1/4w, 1%, metal 15 r8 resistor, 680w, 1/4w, 1% 16 r9 resistor, 680w, 1/4w, 1% 17 r10 resistor, 680w, 1/4w, 1% 18 r11 resistor, 2.2k, 1/4w, 1% 19 c9 capacitor, 100nf 20 c10 capacitor, 100nf 21 c11 capacitor, 0.47f, 250vac, polyester 22 c13 capacitor, 100f 23 c14 capacitor, 100f 24 c15 capacitor, 820nf note 2 25 rsh shunt resistor note 3 26 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 (v dd & v ss ) of ic-1 as possible. note 3: see typical applications when selecting the value of rsh.
ILA19002 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 11 figure 2: application circuit using a cu rrent transformer for current sensing. r1 = r2 l n r9 2.4v to 2.6v dc r8 xtal c9 c10 ic-1 r2 r1 0 v 5 v r7 ct r3 r4 rsh = termination resistor for current transformer supply load rsh r6 6 7 5 4 3 2 1 9 8 10 11 14 12 13 fout dir fmo c11
ILA19002 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 12 parts list for application circuit: figure 2 item symbol description detail 1 ic-1 ILA19002 dip-14 2 xtal crystal, 3.5795mhz colour burst tv 3 rsh resistor note 1 4 r1 resistor, 1%, metal note 2 5 r2 resistor, 1%, metal note 2 6 r3 resistor, 390k, (230vac), 1%, metal 7 r4 resistor, 1m, 1/4w, 1%, metal 8 r6 resistor, 24k, 1/4w, metal 9 r7 resistor, 24k, 1/4w, 1%, metal 10 r8 resistor, 2.2k, 1/4w, 1%, metal 11 r9 resistor, 2.2k, 1/4w, 1%, metal 12 c9 capacitor, 820nf note 3 13 c10 capacitor, 100nf 14 c11 capacitor note 4 15 ct current transformer note 1: see typical applications when selecting the value of rsh. note 2: resistor (r1and r2) values ar e dependant upon the selected value of rsh. note 3: capacitor (c9) to be positioned as close to supply pins (v dd & v ss ) of ic-1, as possible. note 4: capacitor (c11) selected to minimi ze phase error introduced by current transformer (typically 1.5f).

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