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2.1 Preprogrammed Configurations
Sequencing is provided by the UCD90120A, included on the EVM. Observe the sequencing capabilities of
the board by setting the supplies to SW_CTRL (settings in Sequencer control column of Table 1), a
preloaded delay for each supply occurs when the board is powered on. This delay is seen when powering
on by the sequence of LEDs turning on for their respective supplies. The button highlighted in Figure 2
preprograms this delay into the UCD90120A’s flash memory, loading a configuration after the board is
shut off.
Figure 2. Preprogrammed Delays in Flash Memory
2.2 Delay Settings
Figure 2 highlights the location where the turnon and turnoff delay for each supply is set. Edit the supply
value in the Select Rail to Edit area for configuration of each rail's delays independently.
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TSW2200EVM: Multi-Output Power Supply Evaluation Module SLWU081A–May 2012–Revised December 2012
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