PDF BL0932 Data sheet ( Hoja de datos )

Número de pieza	BL0932
Descripción	Dual Measurement Watt-hour Meter IC
Fabricantes	Shanghai Belling
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No Preview Available ! BL0932 Dual Measurement Watt-hour Meter IC BL0932 Application Note DESCRIPTION BL0932 IC is the main chip widely used for single-phase anti-steal electronic watt-hour meters. BL0932 is the modified version of BL0931. It keeps the main features of BL0931, such as better linearity, wide range of dynamic measurement, against potential shift, as well as provides real anti-steal of electricity power. The watt-hour meters made of BL0932 have better reliability. BL0932 is a special large integrated circuit used for static electronic watt-hour meter. It uses silicone barrier BICMOS process with advanced circuitry, dual measurement of wattage, excellent performance, safe & reliable. The circuit is plastic/ceramic packaged dual in line with 20 pins. PIN ASSIGNMENT FEATURES • Have real function of anti-steal of electricity, precisely measure both positive and negative wattful power and integrate the electrical energy at the same direction. • Good linearity, wide dynamic operating range. • Prevent from potential shift • Fast pulse output for computer data processing, slow pulse output will directly drive the pulse motor • For used both as single-phase and three-phase watt-hour meter • Compatible with BL0931 for outline and pin signal • Good reliability with more than 20 years life of time. PIN DESCRIPTION Table 1. PIN DESCRIPTION Pin number Symbol 1,2 Vi1,Vi2 4 VV 4,5 6,7 8 9 10 11 3,12 13,14 15,16 17 18,19 19,20 Vr6 , Vr7 P8 SQ TC VSS GNDA , GNDD MO OSC VDD C1 C2 Explanation Current sample signal input Voltage sample signal input Internal mutual connection Voltage reference outside adjusting terminal Watt power pile-up pulse Negative watt power indicator signal Testing control terminal Negative supply Analog to ground, digital to ground Pulse electrical machinery drive output Crystal oscillation Positive supply(+5v) Integral capacitance Integral capacitance http://www.belling.com.cn -1- Total 10 Pages 8/28/2006 1 page BL0932 Dual Measurement Watt-hour Meter IC Table 2 Input Output Pin10 Measured Power Pin8 Pin9 Pin13 Pin14 GND Positive-going Negative-going Power 0V(DC) Negative Pulse Negative Pulse Active Power Pulse Signal Modulated at the Width of at the Width of by Pulse 8192 Hz 250ms, 1/16 of 250ms,1/16 of (0∼-4V). See diagram II(a) the Frequency at the Frequency Pin8 (0∼-4V) at Pin8(0∼-4V) Negative-going The Same as the Upper -5V(DC) The Same as the The Same as the Active Power Situation (Note1) Upper Situation Upper Situation (Note3) (Note3) -5V Positive-going Power Pulse Square 0V(DC) The Same as the The Same as the Active Power Wave (0∼-4V). See Upper situation Upper Situation diagram II(b) Negative-going Power Pulse Square Same The Same as the The Same as the Active Power Wave (0∼-4V). See diagram II(b) (Note3) wave form as Pin8 Upper Condition (Note3) Upper Situation (Note3) +5V Positive (or IFC output Pulse Series Are No Output No Output Negative)-going Exported alternately at Pin8 and OV(DC) 0V(DC) Active Power Pin9 at the Time Intervals of 1/64s.The Difference between the Output Pulse Series of Pin8 and Pin9 at Two Adjacent 1/64s Time Intervals is Directly Proportional to the Measured Power.Note2 Note1: In this case, even if the measured power is turned from negative-going to positive-going, the level still maintains at –5V until the voltage 220V disappears. If recharged, the –5V level at Pin9 can just return to 0V. Note2: There are few pulse difference at Pin8 and Pin9 at two adjacent 1/64s time intervals, so the accuracy is low. High accuracy can be achieved if we get the pulse difference in Pin8 and Pin9 at a series of 1/64s time intervals. In this case, the pulse series exported at Pin8 and Pin9 are not modulated by the constant frequency pulse of 8192Hz. Note3: No pulse is exported at Pin13,Pin14 if BL0931 is in this case. APPLICATION Using BL0932 to form a single-phase anti-stealing watt-hour meter 1. Circuitry (Fig. 2) BL0932 single-phase watt-hour meter ( Ii = 10A, C = 1600P/Kwh ) 2. Circuitry description BL0932 can measure both positive and negative wattful power with the same measuring accurate. And it counts at one direction at the mechanical counter. So Pin9 of BL0932 need not to connect to the green LED indicator, this is good for increasing the reliability of the meter. Pin12 is the earth of the chip, Pin11 is Vss(-5V), Pin17 is Vdd(+5V). 220V AC is voltage divided through R11(470), C4(0.33µ/630V), C5(0.10µ). AC current at C5 is sent to diode D1 & D2 for semiwave rectification. Zener diode Z1 & Z2 (5.1V) are used for voltage clamping to make Vdd & Vss not exceed ±5.1V. The voltage at R11 ends is 11.5VAC, 219VAC at C4(at 0.33µ), 5.5V at C5. Increasing C4 will improve the stability of Vdd & Vss and the driving ability of the step motor. C6 & C7 (4100 - 4700pF) are the integrating capacitor of the built-in I-F converter. Pin15 & Pin16 are connected to the crystal of 32768Hz which determines the logic metre frequency of the chip and converting speed of I-F. http://www.belling.com.cn -5- Total 10 Pages 8/28/2006 5 Page

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