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Delta Electronics Series 240W manual

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Table of contents for the manual

  • Page 1

    DATASHEET DS_E48SB12020_05 222008 FEATURES  Input voltage range: 38V~55V  Output 240W @ 44Vin and above  Output 22.3A @ 44Vin and below  High efficiency: 96.3% @ 12V/20A  Size: 58.4mm x 22.8mm x 1 1.4mm (2.28” x 0.90” x 0.45”)  Industry standard pinout  Fully protected: Input UVLO, OVP , Output OCP and OTP  Parallelabl[...]

  • Page 2

    DS_E48SB12020_05222008 2 TECHNICAL SPECIFICA TIONS (T A =25°C, airflow rate=300 LFM, V in =48Vdc, nominal V out unless otherw ise noted.) PA R A M E T E R NOTES and CONDITIONS E48SB12020 (St andard) Min. T yp. Max. Units ABSOLUTE MAXIMUM RA TINGS Input V oltag e Continuous 60 Vdc Operating T emperature Refer to Figure 18 for the mea suring point -[...]

  • Page 3

    DS_E48SB12020_05222008 3 ELECTRICAL CHARACTERISTICS CUR VES 90 91 92 93 94 95 96 97 3 6 9 1 21 5 1 82 1 2 4 Out put Current (A ) Effi ci e n cy ( %) 38Vin 48Vin 55Vin 0 2 4 6 8 10 0 3 6 9 12 15 18 21 24 Out put Current (A ) L o ss ( W ) 38Vin 48Vin 55Vin Figure 1: Efficiency vs. load current for minimum, nominal, and maximum in put voltage at 25°C[...]

  • Page 4

    DS_E48SB12020_05222008 4 ELECTRICAL CHARACTERISTICS CUR VES For Negative Remote On/Off Logic Figure 5: T urn-on transient at full rated load cur rent (5 ms/div). T op T race: V out; 5V/div; Bottom T race: ON/OFF input: 2V/div Figure 6: T urn-on transient at zero load current (5 ms/div). T op T race: Vout: 5V/div; Bottom T race: ON/OFF input: 2V/div[...]

  • Page 5

    DS_E48SB12020_05222008 5 ELECTRICAL CHARACTERISTICS CUR VES Figure 9: Output voltage response to step-change in load current (50%-75%-50% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF , tantalum capacitor and 1µF ceramic capacitor . T op T race: V out (200mV/div , 200us/div), Bo ttom T race: Iout (10A/div). Scope measurement shoul d be made using[...]

  • Page 6

    DS_E48SB12020_05222008 6 ELECTRICAL CHARACTERISTICS CUR VES Figure 12: Input T erminal Ripple C urrent, i c , at full rated output current and nominal i nput voltage with 12µH source impeda nce and 47µF electrolytic capacitor (100 mA/div , 2us/div). Figure 13: Input reflected ripple current, i s , through a 12 µH source inductor at nominal i npu[...]

  • Page 7

    DS_E48SB12020_05222008 7 DESIGN CONSIDERA TIONS Input Source Impedance The impedance of the input sou rce connecting to the DC/DC powe r modules will interact wit h the modules and affect the st ability . A low ac-impe dance input source is recommended. If the source induct ance is more than a few μ H, we advise adding a 33 to 220 μ F electrolyti[...]

  • Page 8

    DS_E48SB12020_05222008 8 Over-T emp erature Protection The over-temperature protection consists of circuitry t hat provides protection from therm al damage. If the temperature exceeds the over-t em perature threshold, the module will be shut down, and enter in the auto-rest art mode or latch mode, which is optional. For auto-restart mode, the modul[...]

  • Page 9

    DS_E48SB12020_05222008 9 THERMAL CONSIDERA TIONS Thermal management is an importa nt part of the system design. To ensure prop er, reliable operation, sufficie nt cooling of the power mod ule is needed over the entire temperature range of the modul e. Convection coolin g is usually the dominant mode of heat transfer. Hence, the choice of equipment [...]

  • Page 10

    DS_E48SB12020_05222008 10 MECHANICAL DRA WING Pin No. Name Function 1 2 3 4 5 +Vin ON/OFF -Vin -V out +V out Positive input voltage Remote ON/OFF Negative input voltage Negative output voltage Positive output voltage Pin Specification: Pins 1-3 1.0mm (0.040”) diameter Pins 4-5 1.5mm (0.060”) diameter All pins are copper with T in plating (Pb fr[...]

  • Page 11

    DS_E48SB12020_05222008 11 P ART NUMBERING SYSTEM E 48 S B 120 20 N R F A T ype of Product Input V oltage Number of Output s Product Series Output V oltage Output Current ON/OFF Logic Pin Len gth Option Code E- Eighth Brick 48- 38V~55V S- Single B- Bus Converter 120- 12V 20- 20A N- Negative (Default) P- Positive R- 0.170” (Default) N- 0.145” K- [...]