Output Voltage And Limits - Analog Devices Linear ADI Power LTM4681 Manual

LTM4681
PMBus COMMAND DETAILS
VIN_UV_WARN_LIMIT
The VIN_UV_WARN_LIMIT command sets the value of input voltage measured by the ADC that causes an input under-
voltage warning. This warning is disabled until the input exceeds the input startup threshold value set by the VIN_ON
command and the unit has been enabled. If the V
• Sets the INPUT Bit Is the STATUS_WORD
• Sets the V Undervoltage Warning Bit in the STATUS_INPUT Command
IN
• Notifies the Host by Asserting ALERT, unless Masked
VIN_ON
The VIN_ON command sets the input voltage, in Volts, at which the unit starts power conversion.
This command has two data bytes and is formatted in Linear_5s_11s format.
VIN_OFF
The VIN_OFF command sets the input voltage, in Volts, at which the unit stops power conversion.
This command has two data bytes and is formatted in Linear_5s_11s format.
MFR_ICHIP_CAL_GAIN
The MFR_ICHIP_CAL_GAIN command is used to set the resistance value of the V
(See also READ_VIN). Set MFR_RVIN equal to 0 if no filter element is used.
This command has two data bytes and is formatted in Linear_5s_11s format.

Output Voltage and Limits

COMMAND NAME CMD CODE DESCRIPTION
VOUT_MODE
VOUT_MAX
VOUT_OV_FAULT_ LIMIT
VOUT_OV_WARN_ LIMIT
VOUT_MARGIN_HIGH
VOUT_COMMAND
VOUT_MARGIN_LOW
VOUT_UV_WARN_ LIMIT
VOUT_UV_FAULT_ LIMIT
MFR_VOUT_MAX
94
IN
0x20 Output voltage format and exponent
–12
(2 ).
0x24 Upper limit on the output voltage
the unit can command regardless of
any other commands.
0x40 Output overvoltage fault limit.
0x42 Output overvoltage warning limit.
0x25 Margin high output voltage set
point. Must be greater than
VOUT_COMMAND.
0x21 Nominal output voltage set point.
0x26 Margin low output voltage
set point. Must be less than
VOUT_COMMAND.
0x43 Output undervoltage warning limit.
0x44 Output undervoltage fault limit.
0xA5 Maximum allowed output voltage.
For more information
Voltage drops below the VIN_UV_WARN_LIMIT the device:
TYPE PAGED
R Byte Y
R/W Y
Word
R/W Y
Word
R/W Y
Word
R/W Y
Word
R/W Y
Word
R/W Y
Word
R/W Y
Word
R/W Y
Word
R Word Y
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pin filter element in milliohms.
IN
DATA
FORMAT UNITS NVM
Reg
L16 V Y
L16 V Y
L16 V Y
L16 V Y
L16 V Y
L16 V Y
L16 V Y
L16 V Y
L16 V
DEFAULT
VALUE
–12
2
0x14
3.6
0xC399
1.1
0x119A
1.075
0x1133
1.05
0x10CD
1.0
0x1000
0.95
0x0F33
0.925
0x0ECD
0.9
0x0E66
3.6
0xC399
Rev. A