BL6506
Single Phase Energy Meter IC
with Integrated Oscillator
7) Power Supply Monitor
BL6506 has the on-chip Power Supply monitoring The BL6506 will remain in a reset
condition until the supply voltage on VDD reaches 4 V. If the supply falls below 4 V, the BL6506
will also be reset and no pulses will be issued on F1, F2 and CF.
TIMING CHARACTERISTIC
(VDD=5V, GND=0V, On-Chip Reference, Integrated Oscillator, Temperature range: -20~+70°C)
Parameter
t1
Value
144ms
Comments
F1 and F2 pulse-width (Logic Low). When the power is low,
the t1 is equal to 144ms; when the power is high, and the
output period falls below 280ms, t1 equals to half of the
output period.
F1 or F2 output pulse period.
½ t2
71ms
Time between F1 falling edge and F2 falling edge.
CF Pulse Period. See Transfer Function section.
CF pulse-width (Logic high). When the power is low, the t5
is equal to 71ms; when the power is high, and the output
period falls below 140ms, t5 equals to half of the output
period.
Minimum Time Between F1 and F2.
t2
t3
t4
t5
t6
CLKIN/4
Notes:
1) CF is not synchronous to F1 or F2 frequency outputs.
2) Sample tested during initial release and after any redesign or process change that may affect this
parameter.
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; V and I 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
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Total
14 Pages
3/15/2007
BELLING [ SHANGHAI BELLING CO., LTD. ]
