MAX78615-LMU View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX78615-LMU Datasheet PDF : 62 Pages
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MAX78615+LMU Data Sheet
Phase Compensation
Phase compensation registers are used to compensate for phase errors or time delays between the voltage input
source and respective current source that are introduced by the off-chip sensor circuit. The user configurable
registers are signed fixed point numbers with the binary point to the left of bit 21. Values are in units of high rate
(4kHz) sample delays so each integer unit of delay is 250µs with a total possible delay of ±4 samples (roughly ±20°
at 60Hz).
Register
PHASECOMP1
PHASECOMP3
Description
Phase (delay) compensation for S1 input current
Phase (delay) compensation for S3 input current
Example:
To compensate a phase error of 277.77µs (or 6° at 60Hz) introduced by a current transformer (CT) it is necessary to
enter the following:
��ℎ������ ����������
��ℎ������ ������������������������ =
1
������������ ��������
277��−6
��ℎ������ ������������������������ = 1 = 1.111
4000
The value to be entered in the phase compensation register is therefore:
���������� = 1.111 ∗ 221 = 2330169 = 0x238E39
Rev 0
18
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