116
Rev. B
For more information
MFR_TEMPERATURE_2_PEAK
The MFR_TEMPERATURE_2_PEAK command reports the highest temperature, in degrees Celsius, reported by the
READ_TEMPERATURE_2 measurement.
This command is cleared using the MFR_CLEAR_PEAKS command.
This read-only command has two data bytes and is formatted in Linear_5s_11s format.
MFR_ADC_CONTROL
The MFR_ADC_CONTROL command determines the ADC read back selection. A default value of 0 in the command runs
the standard telemetry loop with all parameters updated in a round robin fashion with a typical latency of t
CONVERT
.
The user can command a non-zero value to monitored a single parameter with an approximate update rate of 8ms.
This command has a latency of up to 2 ADC conversions or approximately 16ms (external temperature conversions
may have a latency of up to 3 ADC conversion or approximately 24ms). It is recommended the part remain in standard
telemetry mode except for special cases where fast ADC updates of a single parameter is required. The part should be
commanded to monitor the desired parameter for a limited period of time (less then 1 second) then set the command
back to standard round robin mode. If this command is set to any value except standard round robin telemetry (0) all
warnings and faults associated with telemetry other than the selected parameter are effectively disabled and voltage
servoing is disabled. When round robin is reasserted, all warnings and faults and servo mode are re-enabled.
COMMANDED VALUE
TELEMETRY COMMAND NAME
DESCRIPTION
0x0F
Reserved
0x0E
Reserved
0x0D
Reserved
0x0C
READ_TEMPERATURE_1
Channel 1 external temperature
0x0B
Reserved
0x0A
READ_IOUT
Channel 1 measured output current
0x09
READ_VOUT
Channel 1 measured output voltage
0x08
READ_TEMPERATURE_1
Channel 0 external temperature
0x07
Reserved
0x06
READ_IOUT
Channel 0 measured output current
0x05
READ_VOUT
Channel 0 measured output voltage
0x04
READ_TEMPERATURE_2
Internal junction temperature
0x03
READ_IIN
Measured input supply current
0x02
MFR_READ_ICHIP
Measured supply current of the
LTM4680
0x01
READ_VIN
Measured input supply voltage
0x00
Standard ADC Round Robin Telemetry
If a reserved command value is entered, the telemetry will default to Internal IC Temperature and issue a CML fault. CML
faults will continue to be issued by the LTM4680 until a valid command value is entered. The accuracy of the measured
input supply voltage is only guaranteed if the MFR_ADC_CONTROL command is set to standard round robin telemetry.
This write-only command has 1 data byte and is formatted in register format.
PMBus COMMAND DETAILS