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ADP1052 데이터시트(PDF) 60 Page - Analog Devices

부품명 ADP1052
상세설명  Digital Controller for Isolated Power Supply with PMBus Interface
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ADP1052
Data Sheet
Rev. B | Page 60 of 113
PMBus COMMAND DESCRIPTIONS
Note that in the PMBus Command Descriptions section, N/A means not applicable.
BASIC PMBus COMMANDS
OPERATION
The OPERATION command turns the unit on and off in conjunction with the input from the CTRL pin. It also sets the output voltage to
the upper or lower voltage margin. The unit stays in the commanded operating mode until a subsequent OPERATION command
instructs the device to change to another mode.
Table 14. Register 0x01—OPERATION
Bits
Bit Name/Function
R/W
Description
[7:6]
Enable
R/W
These bits determine the response to the OPERATION command.
Bit 7
Bit 6
Description
0
0
Immediate off (no sequencing)
0
1
Soft off (power-down based on the programmed TOFF_DELAY command)
1
0
Unit on
1
1
Reserved
[5:4]
Margin control
R/W
These bits set the voltage margin level.
Bit 5
Bit 4
Description
0
0
Off
0
1
Margin low
1
0
Margin high
1
1
Reserved
[3:0]
Reserved
R
Reserved.
ON_OFF_CONFIG
The ON_OFF_CONFIG command configures the combination of CTRL pin input and serial bus commands needed to turn the unit on and off,
including how the unit responds when power is applied.
Table 15. Register 0x02—ON_OFF_CONFIG
Bits
Bit Name/Function
R/W
Description
[7:5]
Reserved
R
Reserved.
4
Power-up control
R/W
Controls how the device responds to the OPERATION command.
0 = the unit powers up whenever power is present.
1 = the unit powers up only when commanded by the CTRL pin and the OPERATION command
(as programmed in Register 0x02, Bits[3:0]).
3
Command enable
R/W
Controls how the device responds to the OPERATION command.
0 = ignores the OPERATION command.
1 = requires that the OPERATION command be set to the on state to enable the unit (in addition to
the setting of Bit 2).
2
Pin enable
R/W
Controls how the device responds to the value on the CTRL pin.
0 = ignores the CTRL pin.
1 = requires the CTRL pin to be asserted to enable the unit (in addition to the setting of Bit 3).
1
CTRL pin polarity
R/W
Sets the polarity for the CTRL pin.
0 = active low.
1 = active high.
0
Power-down delay
R/W
Action to take at power-down.
0 = uses the TOFF_DELAY value (TOFF_FALL is not supported by the ADP1052) to stop the
transfer of energy to the output.
1 = turns off the output and stops energy transfer to the output as fast as possible.


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