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LTpowerPlay FOR LTC7131-1 QUICK START PROCEDURE
c. The LTC7131-1 supports telemetry read-back
within the LTpowerPlay which allows read-back
of input/output voltages and currents as well as
the device temperature, as shown below.
d. The LTC7131-1 features the PMBus Lite with
a reduced command list as shown below. The
available commands include immediate/soft
turn-off, turn-on or returning to normal opera-
tion, margining output voltage high or low, and
choosing the fault response modes.
e. Here is an example of margining the output volt-
age high. First, enter the desired margin-high
percentage (25%) in the MFR_VOUT_MARGIN_
HIGH field, under “Output Voltage” tab. Note
that the percentage must be within the range of
−25% to 25% for both margin-high and mar-
gin-low commands.
f. Then, select the “MarginHigh” operation from
the “On/off Control and Margining” tab.
g. Next, click the “W” (PC to RAM) icon to write
these register values to the LTC7131-1. Please
make sure that the WP jumper (JP5) is at
“OFF” position.
After finishing this step, if the write is success-
ful, you will see the following message, and the
output voltage will become 25% higher than its
nominal value.
