BL6501 Single Phase Energy MSingle Phase Energy MSingle Phase Energy MSingle Phase Energy Meter IC eter ICeter ICeter IC
www.belling.com.cn - 1/15 - v1.20
Shanghai Belling Co., Ltd 810 Yishan Rd., Shanghai, China 200233 Tel 86-21-64850700 Fax 86-21-64852222
rhombus6 FEATURES
wheel High accuracy, less than 0.1% error over a
dynamic range of 500 : 1
wheel Exactly measure the real power in the positive
orientation and negative orientation, calculate the
energy in the same orientation
wheel Two current monitors continuously monitor the
phase and neutral currents in two-wire distribution
systems. Uses the larger of two currents to bill, even
during a Fault condition
wheel A PGA in the current channel allows using small
value shunt and burden resistance
wheel The low frequency outputs F1 and F2 can
directly drive electromechanical counters and two
phase stepper motors and the high frequency output
CF, supplies instantaneous real power, is intended for
calibration and communications
wheel Two logic outputs REVP and FAULT can be used
to indicate a potential orientation or Fault condition
wheel On-Chip power supply detector
wheel On-Chip anti-creep protection
wheel On-Chip voltage reference of 2.42V±8%
(typical temperature coefficient of 30ppm/℃)，with
external overdrive capability
wheel Single 5V supply
wheel Low static power (typical value of 15mW).
The technology of SLiM (Smart–Low–current–
Management ) is used.
wheel Credible work, working time is more than twenty
years

Interrelated patents are pending
rhombus6 DESCRIPTION
The BL6501 is a low cost, high accuracy, high
stability, simple peripheral circuit electrical energy
meter IC. The meter based on the BL6501 is intended
for using in single-phase, two-wire distribution
systems. It can exactly measure the real power in the
positive orientation and negative orientation and
calculate the energy in the same orientation.
The BL6501 incorporates a novel fault detection
scheme that both warns of fault conditions and allows
the BL6501 to continue accurate billing during a fault
event. The BL6501 does this by continuously
monitoring both the phase and neutral (return)
currents. Fault condition is indicated by PIN19
(FAULT), when these currents differ by more than
12%. Billing is continued using the larger of the two
currents when the difference is greater than 14%.
The BL6501 supplies average real power
information on the low frequency outputs F1 (Pin23)
and F2 (Pin24). These logic outputs may be used to
directly drive an electromechanical counter and
two-phase stepper motors. The CF (Pin22) logic
output gives instantaneous real power information.
This output is intended to be used for calibration
purposes or interface to an MCU.
BL6501 thinks over the stability of reading
error in the process of calibration.. An internal no-load
threshold ensures that the BL6501 does not exhibit
any creep when there is no load.



rhombus6 BLOCK DIAGRAM
1
2
3
4
5
6
7
8
9
10
11
12 13
14
15
16
17
18
19
20
21
22
23
24
BL6501
DVDD
AC/DC
AVDD
V1A
V1B
V1N
V2N
V2P
RESET
VREF
AGND
SCF S1
S0
G1
G0
CLKIN
CLKOUT
FAULT
F1
F2
CF
DGND
REVP

DIP/SSOP 24
current
sampling
voltage
sampling
analog
to digital
high
pass
filter
digital
multiplication
digital to
frequency
and
output
low
pass
filter
V1A
V1N
V1B
V2P
V2N
AC/DC
REVP
CF
F1
F2
BL6501
AVDD
power
detectorvoltage
reference
VREF
analog
to digital
high
pass
filter
input control
logical control
RESETG0 G1 S0 S1SCF
FAULT