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CSE7759B Datasheet(PDF) 24 Page - Core Technology (Shenzhen) Co., Ltd.

Part No. CSE7759B
Description  Calibration-free Electric Energy Measuring Chip
Download  25 Pages
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Maker  CHIPSEA [Core Technology (Shenzhen) Co., Ltd.]
Homepage  http://www.chipsea.com/
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本资料为芯海科技专有财产,非经许可,不得复制、翻印或转变其他形式使用。
This document is exclusive property of CHIPSEA and shall not be reproduced or copied or transformed to any other format
without prior permission of CHIPSEA
聚点滴之芯.成浩瀚之海
24/25
3.8.3 Active power operation reference flow chart
Start
Packet header 1=55H?
Packet header 2=5AH?
Checksum1 right?
Adj.4=1?
Measured power=power
coefficient*V2R/(power cycle*V1R)
End
Packet header 1=AAH?
Chip not
calibrated
YES
Packet header 1=FxH
&(包头1.bit2=1|Packet header
1.bit3=1)?
Abnormal external
circuit or chip damage
NO
YES
YES
YES
NO
N0
NO
Packet header 1=FxH
&Packet header 1.bit2=0
&Packet header 1.bit3=0?
NO
YES
YES
NO
NO
Packet header 1=FxH
&Packet header 1.bit1=1
Measured power=0
YES
NO
YES
Figure 8: active power flow charts
3.9 Boot Threshold and Shunt Running Prevention of the Chip
CSE7759B adopts new-type shunt running prevention algorithm. Only if power value of input
signal is larger than internal noise value, will the measuring module will start measuring normally.
3.10 Built-in Oscillator
Frequency of built-in oscillator used on CSE7759B is about 3.579M. Power supply rejection
ratio is <0.01/V.
3.11 Built-in Reference Source
CSE7759B is fitted with built-in high-accuracy bandgap reference source. Typical voltage
outputted by reference source is 2.43V.




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