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DNL04S0A0R06NFD Datasheet(PDF) 11 Page - Delta Electronics, Inc. |
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DNL04S0A0R06NFD Datasheet(HTML) 11 Page - Delta Electronics, Inc. |
11 / 16 page DS_DNL10SMD_07182012 11 FEATURE DESCRIPTIONS (CON.) The output voltage tracking feature (Figure 35 to Figure 37) is achieved according to the different external connections. If the tracking feature is not used, the TRACK pin of the module can be left unconnected or tied to Vin. For proper voltage tracking, input voltage of the tracking power module must be applied in advance, and the remote on/off pin has to be in turn-on status. (Negative logic: Tied to GND or unconnected. Positive logic: Tied to Vin or unconnected) Figure 35: Sequential start-up Figure 36: Simultaneous Figure 37: Ratio-metric Sequential Start-up Sequential start-up (Figure 35) is implemented by placing an On/Off control circuit between VoPS1 and the On/Off pin of PS2. R1 R2 VoPS1 PS1 Vin On/Off On/Off PS2 VoPS2 Vin C1 Q1 R3 Simultaneous Simultaneous tracking (Figure 36) is implemented by using the TRACK pin. The objective is to minimize the voltage difference between the power supply outputs during power up and down. The simultaneous tracking can be accomplished by connecting VoPS1 to the TRACK pin of PS2. Please note the voltage apply to TRACK pin needs to always higher than the VoPS2 set point voltage. TRACK VoPS1 PS2 VoPS2 PS1 Vin Vin On/Off On/Off PS1 PS2 PS1 PS2 +△V PS1 PS2 PS1 PS2 PS1 PS2 PS1 PS2 |
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