Linear Technology DC1962C, Демонстрационное руководство

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dc1962cf
DEMO MANUAL DC1962C
Figure 9. Updated Fault Sharing Configuration
Fault Configuration Example
Let’s explore two different examples. Suppose we do not
want channel U1:0 (CH2 1.5V rail) to propagate its fault
to the other channels when U1:0 faults. And suppose we
do not want channel U1:1 (CH3 1.8V rail) to shut down in
response to another channel’s fault. We can configure the
switches as shown in Figure 9. Simply click the switches
to open/close. Click OK to close the dialog box. Click the
“PC
→
RAM” icon to write the changes to the DC1962C.
We can now create a fault on U1:0 (CH2) by shorting the
output to ground. Press the CREATE FAULT button on
the board. You will notice that the channel shuts off but
the other channels remain powered up because its fault
is not propagated to the other channels. After the retry
period, channel U1:0 (CH2) will power back up. We can
now observe the effect of changing the response setting on
U1:1 (CH3). If you short U1:2 (CH4 2.0V rail) to ground,
notice that all rails shut down except U1:1 (CH3). This is
an example of a keep-alive channel that remains powered
up independent of faults to other channels.
aDvanceD Demo BoarD operations