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BL6533 Schematic ( PDF Datasheet ) - BELLING

Teilenummer BL6533
Beschreibung Single Phase / LCD / Energy Meter IC
Hersteller BELLING
Logo BELLING Logo 




Gesamt 10 Seiten
BL6533 Datasheet, Funktion
BL6533
Single Phase, LCD, Energy Meter IC
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 18×4 bit RAM for display data storage
4 Single 5V supply
The BL6533 is a low cost, high accuracy, high
stability, simple peripheral circuit electrical energy
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 no-load
threshold ensures that the BL6533 does not exhibit
any creep when there is no load.
BL6533 System
http://www.belling.com.cn
-1-
Total 10 Pages
9/9/2009






BL6533 Datasheet, Funktion
BL6533 Single Phase Energy Meter IC with LCD Driver
When V(v)= ±110mV, cosϕ=1, over the arrange of 5%Ib to 800%Ib, the nonlinear 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 error 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 BL6533 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 reset
and no pulses will be issued on CF.
THEORY OF OPERATION
Principle of Energy Measure
In energy measure, the power information varying with time is calculated by a direct multiplication of
the voltage signal and the current signal. Assume that the current signal and the voltage signal are cosine
functions; Umax, Imax are the peak values of the voltage signal and the current signal; ωis the angle
frequency of the input signals; the phase difference between the current signal and the voltage signal is
expressed asφ. Then the power is given as follows:
p(t) = U max cos(wt) × I max cos(wt + ϕ )
If φ=0:
p(t) = U max I max [1 + cos(2wt)]
2
If φ≠0:
p(t) = U max cos(ωt) × I max cos(ωt + Φ)
= U max cos(ωt) × [I max cos(ωt) cos(Φ) + I max sin(ωt) sin(Φ)]
=
U
Imax max
2
[1
+
cos(2ωt )] cos(Φ)
+
U
max
I
max
cos(ωt)
sin(ωt ) sin(Φ)
= U max I max [1 + cos(2ωt)]cos(Φ) + U max I max sin(2ωt) sin(Φ)
22
= U max I max cos(Φ) + U max I max [cos(2ωt) cos(Φ) + sin(2ωt) sin(Φ)]
22
= U max I max cos(Φ) + U max I max cos(2ωt + Φ)
22
P(t) is called as the instantaneous power signal. The ideal p(t) consists of the dc component and ac
component whose frequency is 2ω. The dc component is called as the average active power, that is:
P = U max I max cos(ϕ )
2
http://www.belling.com.cn
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Total 10 Pages
9/9/2009

6 Page







SeitenGesamt 10 Seiten
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