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CSE7759B Datasheet(PDF) 20 Page - Core Technology (Shenzhen) Co., Ltd.

Part No. CSE7759B
Description  Calibration-free Electric Energy Measuring Chip
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Maker  CHIPSEA [Core Technology (Shenzhen) Co., Ltd.]
Homepage  http://www.chipsea.com/

 20 page
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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
Allowable calibration times are 6 at present. The chip will be calibrated before it is
3.6.2 Delivery Calibration Parameters as Well as Current, Voltage and Power Formula of
the Chip
Delivery calibration parameter of CSE7759B is 1mR manganin resistor (resistor at V1P and
V1N will be identified as V1R hereunder) at V1P and V1N, and is 1M resistor at V2P (resistor at
V2P will be identified as V2R hereunder) and input load signal is 5A, 220V(see Figure 2). Thus,
V1R and V2R may be neglected when calculating if external hardware is consistent with
calibration parameter upon delivery.
◆Current calculation formula:
Measured current Ix(A)=
current coefficient (hexadecimal number)
current cycle (hexadecimal number) ∗ V1R
◆Voltage calculation formula:
Measured voltage Ux(V)=
voltage coefficient (hexadecimal number) ∗ V2R
voltage cycle (hexadecimal number)
◆Power calculation formula:
Measured power Px(W)=
Power coefficient(hexadecimal number) ∗ V2R
Power cycle (hexadecimal number) ∗ V1R
Note: If the parameter at V1P and V1N is 1mR manganin resistor, V1R=1; if the parameter
at V1P and V1N is 2mR manganin resistor, V1R=2 and so forth; if the parameter at V2P is 1M
resistor, V2R=1; if the parameter at V2P is 2M resistor, V2R=2 and so forth.
It is only the chip that is calibrated upon delivery calibration rather than complete machine.
Thus, little error will exist (different from the noise generated by PCB; the error range is
different tool). If the error is unacceptable to the user after testing, it may be calibrated by the
user. Consult to the Company for details.
3.7 Electric Quantity Calculation
3.7.1 Frequency of CF

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