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CSE7759B 데이터시트(PDF) 11 Page - Core Technology (Shenzhen) Co., Ltd.

부품명 CSE7759B
상세설명  Calibration-free Electric Energy Measuring Chip
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제조업체  CHIPSEA [Core Technology (Shenzhen) Co., Ltd.]
홈페이지  http://www.chipsea.com/
Logo CHIPSEA - Core Technology (Shenzhen) Co., Ltd.

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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
11/25
error of CSE7759B without calibration may be controlled within ±3%.
1M resistor in voltage channel shall select high pressure resistant 1000V 1% resistor (or
with higher accuracy); otherwise, it is necessary to divide into five 0805 1% (or with higher
accuracy) resistors. It is necessary to protect complete machine being damaged in the process of
use due to insufficient withstanding voltage of resistor.
CSE7759B section collects strong current signal. As specified in safety regulation, the
positions accessible to anybody shall be isolated. As shown in Figure 2, opto-isolator is used (the
client may select isolation method of its own option and it is not limited).
Select neutral line or live line as ground. It is recommended to use neutral line as ground.
CSE7759B
VDD
V1P
V1N
V2P
RI
CF
TI
VSS
1MR 1%
1000V
1K 1%
33nF
33nF
220V
Load
5V
1K 1%
L
live line
1K 1%
Power
Supply
Module
N
neutral line
L
1mR 1%
manganin
resistor
33nF
0.1uF
10uF
UART
neutral line
as ground
MCU
3.3V
4K7
8050
4K7
5V
UART RX
4K7
3.3V
8050
Figure 3: Typical Application of CSE7759B (Non-isollation)
Figure 3 shows CSE7759B non-isolation scheme. Operating voltage of MCU is 3.3V.
If
operating voltage of MCU is 5V, 200R resistor may be connected between TI and MCU.
3.2 Signal Frequency of Active Power
������������
Internal DSP of CSE7759B has certain gain. Output frequency of active power may be
calculated through the following formula after passing through frequency conversion module:
������������=
����1 × ����2 × 48
����������������
2
×
����������������
128
V1: Voltage signal on current channel pin;


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