Datasheet > BL0921

BL0921

更新时间： 2024-09-24 12:23:03

品牌	Logo	应用领域
上海贝岭 - BELLING		振荡器
页数	文件大小	规格书
13页	442K
描述
Single Phase Energy Meter IC with Integrated Oscillator

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中文翻译

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数据手册

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BL0921 数据手册

SinglePhaseEnergyMeterIC

with Integrated Oscillator

BL0921

ꢀ FEATURES

ꢀ DESCRIPTION

ꢁ

High accuracy, less than 0.1% error over a

The BL0921 is a low cost, high accuracy, high

stability, simple peripheral circuit electrical energy

meter IC. The meter based on the BL0921 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.

dynamic range of 500: 1

ꢁ

On-chip oscillator as clock source

Exactly measure the real power in the positive

orientation and negative orientation, calculate the

energy in the same orientation

ꢁ

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

The BL0921 incorporates a novel fault detection

scheme that both warns of fault conditions and allows

the BL0921 to continue accurate billing during a fault

event. The BL0921 does this by continuously

monitoring both the phase and neutral (return)

currents. PIN12 (FAULT) indicates Fault condition,

when these currents differ by more than 12.5%.

Billing is continued using the larger of the two

currents when the difference is greater than 14%.

The BL0921 supplies average real power

information on the low frequency outputs F1 (Pin16)

and F2 (Pin15). These logic outputs may be used to

directly drive an electromechanical counter and

two-phase stepper motors. The CF (Pin14) logic

output gives instantaneous real power information.

This output is intended to be used for calibration

purposes or interface to an MCU.

ꢁ

A PGA in the current channel allows using small

value shunt and burden resistance

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

ꢁ

Two logic outputs REVP and FAULT can be used

to indicate a potential orientation or Fault condition

ꢁ

On-Chip power supply detector

On-Chip anti-creep protection

On-Chip voltage reference of 2.5V±8%

Single 5V supply

Low static power (typical value of 25mW).

The technology of SLiM (Smart–Low–current–

Management) is used.

BL0921 thinks over the stability of reading

error in the process of calibration. Bulk test data

indicate that in the condition of small signal 5%Ib

(Ib=5A), the error of CF is less than 0.1%. An internal

no-load threshold ensures that the BL0921 does not

exhibit any creep when there is no load.

ꢁ

Credible work, working time is more than twenty

years

Interrelated patents are pending

ꢀ

BLOCK DIAGRAM

VREF

VDD

input contron

internal

oscillator

power

detector

voltage

reference

V1A

V1B

V1A

V1B

V1N

BL0921

analog

digital

high

pass

current

sampling

FAULT

REVP

digital

frequency

and

V1N

V2N

REVP

filter

digital

multiplic

ation

low

pass

filter

BL0921

₁₂FAULT

analog

digital

high

pass

V2P

V2N

voltage

sampling

output

filter

V2P

VREF

GND

logic contron

SOP 16

http://www.belling.com.cn

- 1 -

3/15/2007

Total 13 Pages

12 3 4 5 6 7...13

中文翻译

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