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Delta Electronics ND Series manual

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Table of contents for the manual

  • Page 1

    PRELIMINARY DATA SHEET DS_ND1 2S50A _07172008 FEATURES  High efficiency: 92.5% @ 12Vin, 3.3V/50A out y Size: 61.0x31.8x10.2mm (2.40”×1.25”×0.40”)  V olt age and resistor-based trim  No minimum load required  Output voltage programmable from 0.9Vdc to 3.63Vdc via external resistors  Fixed frequency operation  Single-in line[...]

  • Page 2

    DS_ND12S10A_07 172008 2 TECHNICAL SPECIFICA TIONS (Ambient T emperature=25°C, minim um airflow=200LFM, no minal V in =12Vdc unless otherw ise specified.) PA R A M E T E R NOTES and CONDITIONS ND12S0A0V50 (S tandard) Min. T yp. Max. Units ABSOLUTE MAXIMUM RA TINGS Input V oltage -0.3 13.8 Vdc Operating T emperature Refer to Figure 32 for the mea su[...]

  • Page 3

    DS_ND12S10A_07 172008 3 ELECTRICAL CHARACTERISTICS CUR VES 70 75 80 85 90 95 5.01 10 15 20 25 30 35 40 45 50 OUTPUT CURRE NT (A) EFFICIENCY (%) 10.2 12.0 13.8 70 75 80 85 90 95 5.01 10 15 20 25 30 35 40 45 50 OUTPUT CURRE NT (A) EFFICIENCY (%) 10.2 12.0 13.8 Figure 1: Converter efficiency vs. output current (0.9V output voltage) Figure 2: Converter[...]

  • Page 4

    DS_ND12S10A_07 172008 4 ELECTRICAL CHARACTERISTICS CUR VES (CON.) Figure 7: Output ripple & noise at 12V in, 0.9V/50A out Figure 8: Output ripple & noise at 12V in, 1.2V/50A out Figure 9: Output ripple & noise at 12V in, 1.5V/50A out Figure 10: Output ripple & noise at 12Vin, 1.8V/50A out Figure 1 1: Output ripple & noi se at 12[...]

  • Page 5

    DS_ND12S10A_07 172008 5 ELECTRICAL CHARACTERISTICS CUR VES (CON.) Figure 13: T urn on delay time at 12Vin, 0.9V/50A out Ch1: V o ut Ch4: Vin Figure 1 4: T urn on delay time Remote On/Off, 0.9V/50A out Ch1: V o ut Ch4: Enable Figure 15: T urn on delay time at 12Vin, 3.3V/50A out Ch1: V o ut Ch4: Vin Figure 1 6: T urn on delay time at Remote On/Off, [...]

  • Page 6

    DS_ND12S10A_07 172008 6 Figure 19: T y pical transient response to step load cha nge at 10A/ μ S from 50%to 75% and 75% to 50 of Io, max at 12Vin, 1.5V out Figure 20: T y pical transient response to step load cha nge at 10A/ μ S from 50%to 75% and 75% to 50 of Io, max at 12Vin, 1.8V out Figure 21: T y pical transient response to step load cha nge[...]

  • Page 7

    DS_ND12S10A_07 172008 7 DESIGN CONSIDERA TIONS The ND 50A uses two phase and volt age mode controlled buck topology . The output can be trimmed in the range of 0.9Vdc to 3.63Vdc with a resist or from T rim pin to Ground. A remote sense function is provided and it is able to compensate for a drop from the o utput of converter to point of load. The c[...]

  • Page 8

    DS_ND12S10A_07 172008 8 FEA TURES DESCRIPTIONS (CON.) Input Under-V oltage Lockout The input under-voltag e lockout prevents the converte r from being damaged while operating when the input voltage is too lo w . The lockout occurs between 7.6V to 9.0V . Over-Current and Short-Circuit Protection The ND series modules have non-l atching over-current [...]

  • Page 9

    DS_ND12S10A_07 172008 9 Output Capacit ance an external output capacitor(mi n 680uF) is required for stable operation. V olt age Margining Adjustment Output voltage margi n adjusting can be impleme nted in the ND modules by con necting a resi stor , R margin-up , from the T rim pin to the Ground for margining up the output voltage. Also, the output[...]

  • Page 10

    DS_ND12S10A_07 172008 10 THERMAL CUREVES ` Figure 32: T emperature measurement locati on* The allowed maximu m hot spot t emper ature is defin ed at 124 ℃ ND12S0A0V50(standar d) Outp ut Current vs. A mbient T emperature a nd Air V elocity @Vin=12V V out=0.9V ( Through P CB Orientat ion) 0 5 10 15 20 25 30 35 40 45 50 55 25 30 3 5 40 45 5 0 55 60 [...]

  • Page 11

    DS_ND12S10A_07 172008 11 MECHANICAL DRA WING VERTICAL THERMAL CUREVES ND12S0A0V50(standar d) Outp ut Current vs. A mbient Tem perat ure and A ir Velocity @Vin=12V V out=3.3V ( Through P CB Orientation) 0 5 10 15 20 25 30 35 40 45 50 55 25 30 3 5 40 45 5 0 55 60 65 70 75 80 85 Natu ral Convect ion O utput Current (A) Ambi en t T emp er atu re ( ℃ [...]

  • Page 12

    DS_ND12S10A_07 172008 12 P ART NUMBERING SYSTEM MODEL LIST Model Name Packaging Input V oltage Output V olta ge Output Current Efficiency 12Vin @ 100 % load ND12S0A0V50PNF A V ertical 10.2 ~ 13.8Vdc 0.9 V ~ 3.63Vdc 50A 92.5% CONT ACT : www .delt a.com.tw/dcdc USA: T elephone: East Coast: (888) 335 8201 West Coast: (888) 335 8208 Fax: (978) 656 3964[...]