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ILA19002 Datasheet(PDF) 8 Page - Integral Corp. |
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ILA19002 Datasheet(HTML) 8 Page - Integral Corp. |
8 / 12 page 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 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 200µ Ω 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: 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) |
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Similar Description - ILA19002 |
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