Delta Electronics NC15 Series manual

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Table of contents for the manual

  • Page 1

    FEATURES  High Efficiency: 91% @ 12Vin, 5V/15A out  Size: 30.5x27.9x1 1.4mm (1.20”×1.10”×0.45”) -- V ertical 30.5x27.9x12.9mm (1.20”×1.10”×0.51”) -- Horizontal  V oltage and resistor-based trim  No minimum load required  Output voltage programmable from 0.9Vdc to 5.0Vdc via external resistors  Fixed frequency opera[...]

  • Page 2

    NC12S15A_01 102008 2 TECHNICAL SPECIFICA TIONS (Ambient T emperature=25°C, minimum airflow =200LFM, nominal V in =12Vdc u nless otherwise specified.) PA R A M E T E R NOTES and CONDITIONS NC12S0A0V/H15 Min. T yp. Max. Units ABSOLUTE MAXIMUM RA TINGS Input V oltage 14 Vdc Operating T emperature (V erti cal) With appropriate air flow and derating, s[...]

  • Page 3

    NC12S15A_01 102008 3 ELECTRICAL CHARACTERISTICS CUR VES 0 10 20 30 40 50 60 70 80 90 012 34567 89 1 0 1 1 1 2 1 3 1 4 1 5 Output Current (A ) Efficiency (%) 10.2 12 13. 8 0 10 20 30 40 50 60 70 80 90 012 34567 89 1 0 1 1 1 2 1 3 1 4 1 5 Output Current (A ) Efficiency (%) 10.2 12 13.8 Figure 1: Converter efficiency vs. output current Figure 2: Conve[...]

  • Page 4

    NC12S15A_01 102008 4 ELECTRICAL CHARACTERISTICS CUR VES Figure 7: Output ripple & noise at 12V in, 0.9V/15A out Figure 8: Output ripple & noise at 12V in, 1.2V/15A out Figure 9: Output ripple & noise at 12V in, 1.8V/15A out Figure 10: Output ripple & noise at 12Vin, 2.5V/15A out Figure 1 1: Output ripple & no ise at 12Vin, 3.3V/[...]

  • Page 5

    NC12S15A_01 102008 5 ELECTRICAL CHARACTERISTICS CUR VES Figure 13: T urn on delay ti me at 12Vin, 0.9V/15A out Ch2:Vin Ch3:V out Ch4:PWRGD Figure 14: T ur n on delay time Remote On/Off, 0.9V/15A out Ch2:ENABLE Ch3:Vout Ch4:PWRGD Figure 15: T urn on delay ti me at 12Vin, 2.5V/15A out Ch2:Vin Ch3:V out Ch4:PWRGD Figure 16: T ur n on delay time at Rem[...]

  • Page 6

    NC12S15A_01 102008 6 ELECTRICAL CHARACTERISTICS CUR VES Figure 19: T ypical transient respons e to step load change at 10A/ μ S from 50% to 75% and 75% to 50 % of Io_max at 12Vin, 0.9V out Figure 20: T ypical transient respons e to step load change at 10A/ μ S from 50% to 75% and 75% to 50% of Io_max at 12Vin, 1.2V out Figure 21: T ypical transie[...]

  • Page 7

    NC12S15A_01 102008 7 DESIGN CONSIDERA TIONS FEA TURES DESCRIPTIONS ENABLE (On/Off) The NC15 is a single phase and volt age mode controlled Buck topology . Block diagram of the converter is shown in Figure 23. The output can be trimm ed in the range o f 0.9Vdc to 5.0Vdc by a resistor from T rim pin to Ground. The ENABLE (on/of f) input allows extern[...]

  • Page 8

    NC12S15A_01 102008 8 The NC06/NC15/NC20 m odule has a trim range of 0.9V to 5.0V . The trim resistor equation for the NC6A/NC15A/ NC20A is : FEA TURES DESCRIPTIONS (CON.) Input Under-V oltage Lockout 9 . 0 1170 ) ( − = Ω Vout Rs The input under-voltag e lockout prevents the converte r from being damaged while operating when the inpu t voltage is[...]

  • Page 9

    NC12S15A_01 102008 9 FEA TURES DESCRIPTIONS (CON.) Output Capacit ance There is no output capacitor on the NC se ries modules. Hence, an external output capacitor is required for stable operation. For NC15 modules, a n external 6.3V/680 μ F low ESR capacitor (for example, OSCON) is required fo r stable ope ration. Power Good The converter provides[...]

  • Page 10

    NC12S15A_01 102008 10 THERMAL CONSIDERA TION Thermal management is an important part of the system design. To en sure proper, reliable operation, sufficient cooling of the po wer module is needed over the entire temperature range of the module. Convection cooling is usually the dominant mode of heat transfer. Hence, the choice of equipment to ch ar[...]

  • Page 11

    11 THERMAL CURVES (NC12S0A0V15) MODULE A IR FLOW 17.5 (0.69”) 50.8 (2.0”) FA C I N G P W B PWB AIR VEL OCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE 35 ( 1.38”) NC12S0A0V15 (Standard) Output Current vs. Ambient Tem perature and Air Velocity @ Vout = 3.3V (Either Orientation) 0 3 6 9 12 15 25 30 35 40 45 50 55 60 65 70 75 80 85 Outpu[...]

  • Page 12

    NC12S15A_01 102008 12 THERMAL CURVES (NC12S0A0H15) 19 (0.75”) MODULE A IR FLO W 9.5 ( 0.37”) 50.8 (2.0”) FA C I N G P W B PWB AIR VELOCI TY AND AMBI ENT TEMPERATUR E MEASURED BELOW THE MODULE NC12S0A0H15 (Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vout =3.3V (Either Orientation) 0 3 6 9 12 15 25 35 45 55 65 75 85 Outp[...]

  • Page 13

    NC12S15A_01 102008 13 MECHANICAL DRA W ING V E R T I C A L H O R I Z O N T A L[...]

  • Page 14

    NC12S15A_01 102008 14 P ART NUMBERING SYSTEM MODEL LIST Model Name Packaging Input V oltage Output V olt age Output Current Efficiency 12Vin @ 100 % load NC12S0A0V15PNF A V ertical 10.2 ~ 13.8Vdc 0.9 V ~ 5.0Vdc 15A 91% (5.0V) NC12S0A0H15PNF A Horizontal 10.2 ~ 13.8Vdc 0.9 V ~ 5.0Vdc 15A 91% (5.0V) CONT ACT : www .delta. com.tw/dcdc USA: T elephone:[...]