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DNS10S0A0S06PFD Datasheet(PDF) 11 Page - Delta Electronics, Inc. |
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DNS10S0A0S06PFD Datasheet(HTML) 11 Page - Delta Electronics, Inc. |
11 / 15 page DS_DNS10SIP06_03092009 11 FEATURE DESCRIPTIONS (CON.) Sequential Start-up Sequential start-up (Figure 26) is implemented by placing an On/Off control circuit between VoPS1 and the On/Off pin of PS2. Simultaneous Simultaneous tracking (Figure 27) 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. Ratio-Metric Ratio–metric (Figure 28) is implemented by placing the voltage divider on the TRACK pin that comprise R1 and R2, to create a proportional voltage with VoPS1 to the Track pin of PS2. For Ratio-Metric applications that need the outputs of PS1 and PS2 reach the regulation set point at the same time. The following equation can be used to calculate the value of R1 and R2. The suggested value of R2 is 10kΩ. 2 1 2 1 , 2 , R R R V V PS O PS O + = R1 R2 TRACK VoPS1 PS2 VoPS2 PS1 Vin Vin On/Off On/Off The high for positive logic The low for negative logic R1 R2 VoPS1 PS1 Vin On/Off On/Off PS2 VoPS2 Vin C1 Q1 R3 TRACK VoPS1 PS2 VoPS2 PS1 Vin Vin On/Off On/Off |
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