b bb bl ll l6533 6533 6533 6533 single phase, lcd, energy meter ic http://www.belling.com.cn - 1 - 9/9/2009 total 10 pages features 1 high accuracy, less than 0.1% error over a dynamic range of 500 : 1 2 exactly measure the real power in the positive orientation and negative orientation, calculate the energy in the same orientation 3 1 8 4 bit ram for display data storage 4 single 5v supply the BL6533 is a low cost, high accuracy, high stability, simple peripheral circuit electrical ene rgy meter ic. the meter based on the BL6533 is intended for using in single-phase, two-wire distribution systems. the BL6533 adopts the oversample technology and digital signal processing technology. it can exactly measure the real power in the positive orientation and negative orientation and calculate the energy in the same orientation. BL6533 thinks over the stability of reading error in the process of calibration.. an internal n o-load threshold ensures that the BL6533 does not exhibit any creep when there is no load. BL6533 system
BL6533 BL6533 BL6533 BL6533 single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd d dd driver river river river http://www.belling.com.cn - 2 - 9/9/2009 total 10 pages block diagram lqpf64
BL6533 BL6533 BL6533 BL6533 single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd d dd driver river river river http://www.belling.com.cn - 3 - 9/9/2009 total 10 pages pin descriptions pin symbol descriptions 1 vdd provides the supply voltage for the circuitry . it should be maintained at 5 v 5% for specified operation. 2,3,4,5 nc unused 6,7 v1p,v1n inputs for current channel. these input s are fully differential voltage inputs with a maximum signal level of 660 mv 8 nc unused 9 v2p positive inputs for voltage channel. these in puts provide a input. the maximum differential input voltage is 330 mv for sp ecified operation. 10,11 nc unused 12 gnd provides the ground reference for the circui try. 13,14,15,16 nc unused 17 gnd provides the ground reference for the circui try. 18 vlcd lcd power source 19,20 v1,v2 earth capacity ameliorate lcd output waveform 21 com0 common terminal driving output 22 com1 common terminal driving output 23 com2 common terminal driving output 24 com3 common terminal driving output 25 seg17 segment terminal driving output 26 seg16 segment terminal driving output 27 seg15 segment terminal driving output 28 seg14 segment terminal driving output 29 seg13 segment terminal driving output 30 seg12 segment terminal driving output 31 seg11 segment terminal driving output 32 seg10 segment terminal driving output 33,34 nc unused 35 seg9 segment terminal driving output 36 seg8 segment terminal driving output 37 seg7 segment terminal driving output 38 seg6 segment terminal driving output 39 seg5 segment terminal driving output 40 seg4 segment terminal driving output 41 seg3 segment terminal driving output
BL6533 BL6533 BL6533 BL6533 single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd d dd driver river river river http://www.belling.com.cn - 4 - 9/9/2009 total 10 pages 42 seg2 segment terminal driving output 43 seg1 segment terminal driving output 44 seg0 segment terminal driving output 46,46 nc unused 47 vdd provides the supply voltage for the circuitr y. it should be maintained at 5 v 5% for specified operation. 48 osc2 oscillator crystal on 49 osc1 oscillator crystal in 50 vpp reset to the device 51 a1 reset computation setting: high voltage: clear low voltage: keep 52 scl iic serial clock output 53 sda iic serial data 54 cf calibration frequency. the cf logic output gi ves instantaneous real power information. 55 a2 decimal digits setting: high voltage: twain d ecimal digits low voltage: one decimal digits 56,57,58 nc unused 59 a3 60 a4 a3 a4 pulse constant 0 0 3200 imp/kwh 0 1 800 imp/kwh 1 0 1600 imp/kwh 1 1 6400 imp/kwh 61,62,63,64 nc unused ? ? ? ? ? parameter symbol value unit analog &digital power voltage vdd v dd v ss -0.3 to v ss +6.5 v analog input voltage v i v ss -0.3 to v dd +0.3 v operating temperature range t a -40 to +75 storage temperature range t s -50 to +125 power dissipation 400 mw
BL6533 BL6533 BL6533 BL6533 single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd d dd driver river river river http://www.belling.com.cn - 5 - 9/9/2009 total 10 pages absolute maximum ratings (t a =25 vdd=5.0v) parameter symbol test condition min value typical value max value unit 1. power current v dd - 4.7 - 5.5 v 2.lcd power v lcd - 2.7 - 5.5 v 3. input high voltage 1 v ih1 input pin 0.7v dd - v dd v input low voltage 1 v il1 input pin 0 - 0.3v dd v 4. input high voltage 2 v ih2 res 0.9v dd - v dd v input low voltage 2 v il2 res 0 - 0.4v dd v 5 . analog input pins v1p,v1n v2p pin6,7, 9 maximum input voltage v ain 1 v dc input impedance 330 kohm input capacitance 6 10 pf 6.dynamic current i dd 4mhzno load - 7 10 ma terminology 1) measurement error the error associated with the energy measurement ma de by the BL6533 is defined by the following formula: 2) nonlinear error the nonlinear error is defined by the following for mula: enl% [(error at x-error at ib) / (1+error at ib )]*100%
BL6533 BL6533 BL6533 BL6533 single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd d dd driver river river river http://www.belling.com.cn - 6 - 9/9/2009 total 10 pages when v(v)= 110mv, cos j =1, over the arrange of 5%ib to 800%ib, the nonline ar error should be less than 0.1%. 3) positive and negative real power error when the positive real power and the negative real power is equal, and v(v) = 110mv, the test current is ib, then the positive and negative real power er ror can be achieved by the following formula: enp%=|[(en%-ep%)/(1+ep%)]*100%| where: ep% is the positive real power error, en% is the negative real power error. 4) power supply monitor BL6533has the on-chip power supply monitoring the b l6533 will remain in a reset condition until the supply voltage on vdd reaches 4 v. if the supply falls below 4 v, the BL6533 will also be re set and no pulses will be issued on cf. theory of operation principle of energy measure in energy measure, the power information varying wi th time is calculated by a direct multiplication of the voltage signal and the current signal. assume t hat the current signal and the voltage signal are c osine functions; umax, imax are the peak values of the vo ltage signal and the current signal; is the angle frequency of the input signals; the phase differenc e between the current signal and the voltage signal is expressed as . then the power is given as follows: ) cos( ) cos( ) ( max max j + = wt i wt u t p if =0 : )] 2 cos( 1[ 2 ) ( max max wt i u t p + = if ? 0 : [ ] [ ] ) 2 cos( 2 ) cos( 2 ) sin( ) 2 sin( ) cos( ) 2 cos( 2 ) cos( 2 ) sin( ) 2 sin( 2 ) cos( )] 2 cos( 1[ 2 ) sin( ) sin( ) cos( ) cos( ] ) 2 cos( 1 [ 2 ) sin( ) sin( ) cos( ) cos( ) cos( ) cos( ) cos( ) ( max max max max max max max max max max max max max max max max max max max max max f + + f = f + f + f = f + f + = f + f + = f + f = f + = t i u i u t t i u i u t i u t i u t t i u t i u t i t i t u t i t u t p w w w w w w w w w w w w w p(t) is called as the instantaneous power signal. t he ideal p(t) consists of the dc component and ac component whose frequency is 2 . the dc component is called as the average active power, that is: ) cos( 2 max max j i u p =
BL6533 BL6533 BL6533 BL6533 single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd d dd driver river river river http://www.belling.com.cn - 7 - 9/9/2009 total 10 pages the average active power is related to the cosine v alue of the phase difference between the voltage signal and the current signal. this cosine value is called as power factor (pf) of the two channel sig nals. figure1. the effect of phase when the signal phase difference between the voltag e and current channels is more than 90 , the average active power is negative. it indicates the user is using the electrical energy reversely. operation process in BL6533, the two adcs digitize the voltage signal s from the current and voltage transducers. these adcs are 16-bit second order sigma-delta with an ov ersampling rate of 900 khz. this analog input structure greatly simplifies transducer interfacing by providing a wide dynamic range for direct connection to the transducer and also simplifying t he antialiasing filter design. a programmable gain stage in the current channel further facilitates ea sy transducer interfacing. a high pass filter in th e current channel removes any dc component from the c urrent signal. this eliminates any inaccuracies in the real power calculation due to offsets in the vo ltage or current signals. the real power calculation is derived from the inst antaneous power signal. the instantaneous power signal is generated by a direct multiplication of t he current and voltage signals. in order to extract the real power component (i.e., the dc component), the instantaneous power signal is low-pass filtered. figure 2 illustrates the instantaneous real power s ignal and shows how the real power information can be extracted by low-pass filtering the instantaneous p ower signal. this scheme correctly calculates real power for nonsinusoidal current and voltage wavefor ms at all power factors. all signal processing is carried out in the digital domain for superior stab ility over temperature and time.
BL6533 BL6533 BL6533 BL6533 single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd d dd driver river river river http://www.belling.com.cn - 8 - 9/9/2009 total 10 pages figure 2. signal processing block diagram the low frequency output of the BL6533 is generated by accumulatingm this real power information. this low frequency inherently means a long accumula tion time between output pulses. the output frequency is therefore proportional to the average real power. this average real power information can , in turn, be accumulated (e.g., by a counter) to gen erate real energy information. because of its high output frequency and hence shorter integration time , the cf output is proportional to the instantaneou s real power. this is useful for system calibration p urposes that would take place under steady load conditions. voltage channel input the output of the line voltage transducer is connec ted to the BL6533 at this analog input. the maximum peak signal on channel 2 is 330mv. current channel input the voltage outputs from the current transducers ar e connected to the BL6533 here. the maximum differential voltage on current channel 2 is 660mv. the maximum common-mode voltage is 100mv. power supply monitor the BL6533 contains an on-chip power supply monitor . if the supply is less than 4v 5% then the BL6533 will go in an inactive state, i.e. no energy will be accumulated when the supply voltage is bel ow 4v. this is useful to ensure correct device operati on at power up and during power down. the power supply monitor has built-in hysteresis and filterin g. this gives a high degree of immunity to false triggering due to noisy supplies. the trigger level is nominally set at 4v, and the t olerance on this trigger level is about 5%. the power supply and decoupling for the part should be such t hat the ripple at vdd does not exceed 5v 5% as specified for normal operation.
BL6533 BL6533 BL6533 BL6533 single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd d dd driver river river river http://www.belling.com.cn - 9 - 9/9/2009 total 10 pages package dimensions
BL6533 BL6533 BL6533 BL6533 single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd single phase energy meter ic with lcd d dd driver river river river http://www.belling.com.cn - 10 - 9/9/2009 total 10 pages application sketch map BL6533 lcd 24c02 cf voltage sampling i + i - 220v ac rc power 5v
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