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ADP1047-300-EVALZ 데이터시트(PDF) 24 Page - Analog Devices

부품명 ADP1047-300-EVALZ
상세설명  Digital Power Factor Correction Controller
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ADP1047-300-EVALZ 데이터시트(HTML) 24 Page - Analog Devices

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ADP1047/ADP1048
Data Sheet
Rev. 0 | Page 24 of 84
ADVANCED INPUT POWER METERING
The ADP1047/ADP1048 monitor and communicate critical
information, including input and output voltage, input and
output current, temperature, and efficiency. They also monitor
and communicate OVP, UVP, OCP, OTP, and open-loop protec-
tion functions. An I2C interface reads all these values and flags
and programs their thresholds. The on-chip EEPROM can be
used to store all of the settings for the thresholds.
True rms values are calculated at the end of each half ac line
cycle by integrating the instantaneous values across each line
cycle. These values have a resolution of 11 bits and are used to
calculate the average, but are not available to be read through
the PMBus interface.
The averaging window is programmable from zero full line
cycles to 4096 full line cycles using Register 0xFE3A. At the
end of each averaging period, the new value for average power
is written to the READ_PIN register (Register 0x97) and is
available to be read back through the interface until it is
overwritten by the next averaged value at the end of the next
averaging period.
For this reason, the polling frequency used to read average
power through the PMBus interface must be equal to or higher
than the averaging window to maintain data integrity. The
averaging window is programmable over a wide range of times
to accommodate different situations.
Input voltage, input current, output voltage, and input power
are reported in linear format in the following registers:
Input voltage: READ_VIN (Register 0x88)
Input current: READ_IIN (Register 0x89)
Output voltage: READ_VOUT (Register 0x8B)
Input power: READ_PIN (Register 0x97)
CS+
PGND
VAC
CS–
ADC
AVG
AVG
VIN
PIN
IIN
ADC
AVG
0 LINE CYCLES
TO 4096
LINE CYCLES
1
2
3
RMS
RMS
RMS
AC
SYNC
Figure 24. Block Diagram of Power Monitoring
Table 10. Data Format and Range for VIN, IIN, PIN, and VOUT
Metering Data
Mantissa (Bits)
Exponent (N)
Minimum Range
Minimum LSB
Maximum Range
Maximum LSB
VIN
11
−3 to −1
256 V
0.125 V
1024 V
0.5 V
IIN
11
−10 to −5
2 A
0.976 mA
64 A
0.03125 A
PIN
11
−4 to +3
256 W
125 mW
32.8 kW
16 W
VOUT
11
−3 to 0
256 V
0.125 V
2048 V
1 V


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