Temperature; Power Stage Dcr Temperature Calibration; Power Stage Temperature Limits - Analog Devices Linear ADI Power LTM4681 Manual

LTM4681
PMBus COMMAND DETAILS

TEMPERATURE

Power Stage DCR Temperature Calibration

COMMAND NAME
MFR_TEMP_1_GAIN
MFR_TEMP_1_OFFSET
MFR_TEMP_1_GAIN
The MFR_TEMP_1_GAIN command will modify the slope of the power stage sensor to account for non-idealities in
the element and errors associated with the remote sensing of the temperature in the inductor.
This command has two data bytes and is formatted in 16-bit 2's complement integer. The effective gain adjustment is
–14
N • 2 . The nominal value is 1. N = 8192 to 32767
MFR_TEMP_1_OFFSET
The MFR_TEMP_1_OFFSET command will modify the offset of the power stage temperature sensor to account for
non-idealities in the element and errors associated with the remote sensing of the temperature in the inductor.
This command has two data bytes and is formatted in Linear_5s_11s format. The part starts the calibration with a
–273.15 so the default adjustment is zero.

Power Stage Temperature Limits

COMMAND NAME CMD CODE DESCRIPTION
OT_FAULT_LIMIT 0x4F
OT_WARN_LIMIT 0x51
UT_FAULT_LIMIT 0x53
OT_FAULT_LIMIT
The OT_FAULT_LIMIT command sets the value of the power stage temperature measured by the ADC, in degrees
Celsius, which causes an overtemperature fault. The READ_TEMPERATURE_1 value will be used to determine if this
limit has been exceeded.
This command has two data bytes and is formatted in Linear_5s_11s format.
OT_WARN_LIMIT
The OT_WARN_LIMIT command sets the value of the power stage temperature measured by the ADC, in degrees
Celsius, which causes an overtemperature warning. The READ_TEMPERATURE_1 value will be used to determine if
this limit has been exceeded.
100
CMD CODE DESCRIPTION
0xF8 Sets the slope of the external temperature
sensor.
0xF9 Sets the offset of the external temperature
sensor.
Power stage overtemperature fault
limit.
Power stage overtemperature
warning limit.
Power stage undertemperature fault
limit.
For more information
TYPE PAGED
R/W Word Y
R/W Word Y
DATA
TYPE PAGED FORMAT
R/W Word Y L11
R/W Word Y L11
R/W Word Y L11
www.analog.com
DATA DEFAULT
FORMAT UNITS NVM VALUE
CF Y 0.995
0x3FAE
L11 C Y 0.0
0x8000
DEFAULT
UNITS NVM VALUE
C Y 128.0
0xF200
C Y 125.0
0xEBE8
C Y –45.0
0xE530
Rev. A