Linear Technology DC1978A Manual page 9

DEMO MANUAL DC1978A
COMMON DEMO BOARD OPERATIONS
FAULT SHARING SETUP IN THE GUI
Use the fault sharing setup tool to configure the fault
sharing in the GUI. Before doing so, view the fault sharing
demo in the GUI. Go to Tools > Fault Sharing Diagram.
Also, read the section on fault sharing in the data sheet.
"WHY AM I OFF?" TOOL
Use the "Why am I Off?" tool in the LTpowerPlay GUI to
diagnose the reason a power supply channel is turned off.
The tool can be located in the top right corner of the GUI,
next to the Register Information tab.
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Figure 4. Fault Sharing Utility in LTpowerPlay GUI
Figure 5. "Why am I Off?" tool in the LTpowerPlay GUI
TRACKING BASED SEQUENCING
The LTC2974 supports tracking power supplies that are
equipped with a tracking pin and configured for tracking.
A tracking power supply uses a secondary feedback ter-
minal (TRACK) to allow its output voltage to be scaled to
an external master voltage. Typically, the external voltage
is generated by the supply with the highest voltage in the
system, which is fed to the slave track pins (see Figure 6).
Any supplies that track a master supply must be enabled
before the master supply comes up and disabled after the
master supply comes down. Enabling the slave supplies
DC1978a F04
DC1978a F05
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