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Turnon Sequencing Example

3.2 Software Setup

Configure the sequencer delay settings with the following steps:

1. Start the Fusion GUI software.

2. Configure the delay settings for the 5V and 3.3V rails as shown in Figure 6.

3. Set the enable polarities as listed in Mode 2 from Table 3 (accessible in Configure menu as shown in

Figure 3).

4. Click Write to Hardware (all rails must be turned off; verify by appropriate LEDs in Table 2 being off).

5. Change jumpers for all other rails, besides 5 V and 3.3 V, to the settings in Table 1 under Manual

OFF.

6. Connect a scope probe to the 5V rail and another to the 3.3V rail.

7. Change the enable polarities to the settings listed for Mode 1 from Table 3.

8. Click Write to Hardware (5V and 3.3V rails turn on; verify by LEDs).

9. Figure 7 shows the oscilloscope capture of the 5V and 3.3V rails sequencing with a delay of 10 ms.

Figure 6. 5V and 3.3V Rails With 20ms Delay

SLWU081A–May 2012–Revised December 2012 TSW2200EVM: Multi-Output Power Supply Evaluation Module

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