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Delta Electronics F48SA manual

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Table of contents for the manual

  • Page 1

    FEATURES  High efficiency: 91.5% @ 28V/25A  Industry standard size and pinout: 61.0 x 1 16.8 x 12.7mm (2.40”x 4.6 0”x 0.50”)  Fixed frequency operation  Remote sense  Input UVLO, Output OCP , OVP & OTP  Auxiliary bias power  Basic insulation  2250V isolation  ISO 9001, TL 9000, ISO 14 001, QS9000, OHSAS18001 cer[...]

  • Page 2

    TECHNICAL SPECIFICA TIONS (T A =25°C, V in =48Vdc, nomi nal V out unless otherw ise noted.) DS_F48SA28025_1207200 7 2 PA R A M E T E R NOTES and CONDITIONS F48SA28025 (St andard) Min. T y p. Max. U nits ABSOLUTE MAXIMUM RA TINGS Input V oltage Continuous 80 Vdc T ransient (100ms) 100ms 100 Vdc Operating T emperature Please refer to Fig 20 for meas[...]

  • Page 3

    ELECTRICAL CHARACTERISTICS CUR VES Figure 1: Efficiency vs. load current for minimum, nominal, and maximum in put voltage at 25°C. 70 75 80 85 90 95 0 5 10 15 20 25 30 O UT P UT CURRE NT ( A) EFFICIENCY (%) 36Vi n 48Vi n 75Vi n Figure 2: Power dissipa tion vs. load current f or mini mum, nominal, and max imum input voltage at 25°C. DS_F48SA28025_[...]

  • Page 4

    ELECTRICAL CHARACTERISTICS CUR VES For Negative Remote On/Off Logic Figure 3: T urn-on transient a t full rated load current (resistive load). CH3: V out;5V/div; CH1: ON/OFF input: 5V/div Figure 4: T urn-on transient at minimum load current . CH3: V out: 5V/div; CH1: ON/OFF input:5V/div For Positive Remote On/Off Logic Figure 5: T urn-on transient [...]

  • Page 5

    ELECTRICAL CHARACTERISTICS CUR VES Figure 7: Output voltage response to step-change in load current (75%-50% of Io, max; di/dt = 1A/µs). Load cap: 47 0µF aluminum ,10uF Low ESR capacitor and 1µF ceramic capacitor . T op T race: V out ( 200mV/div), Bottom T race: Iout (10 A /div). Scope measureme nt should be made using a BNC cable (length shorte[...]

  • Page 6

    ELECTRICAL CHARACTERISTICS CUR VES Figure 10: Input T erminal Ripple Current, i c , at full rated output current and nominal i nput voltage with 15µH source impedance and 220µF electrolytic capacitor (1A/div). Figure 1 1: Input reflected ripple current, i s , through a 15 µH source inductor at nominal input voltage an d rated load current (10 mA[...]

  • Page 7

    ELECTRICAL CHARACTERISTICS CUR VES Figure 13: Output voltage ripple at nominal input voltage and rated load current (100 mV/div). Load capacitance:470uF aluminum, 1µF ceramic capacitor and 10µFlow ESR capacitor . Bandwidth: 20 MHz. Scope measurement should be made using a BNC cable (length shorte r than 20 inches). Positio n the load between 51 m[...]

  • Page 8

    DESIGN CONSIDERA TIONS Input Source Impedance The impedance of the input sou rce connecting to the DC/DC powe r modules will interact with the modul es and affect the st ability . A low ac-impeda nce input source is recommended. If the source indu ctan ce is more than a few μ H, we advise adding a 220 to 47 0 μ F electrolytic capa citor (ESR <[...]

  • Page 9

    DS_F48SA28025_1207200 7 9 FEA TURES DESCRIPTIONS Over-Current Protection The modules include an internal output over-curre nt protection circuit, which will endure current limiting for an unlimited duration during output overload. If the output current exceeds the OCP set point, the modul es will automatically shut down (hiccup mode). The modules w[...]

  • Page 10

    FEA TURES DESCRIPTIONS (CON.) Output V oltage Adjustment (TRIM) To increase or decrea se the output voltage set point, the modules may be connected wit h an external resistor betwee n the TRIM pin and either the SENSE(+) or SENSE(-). The TRIM pin should be left open if this feature is not used. Figure 17: Circuit configuration for trim-down (decrea[...]

  • Page 11

    THERMAL CONSIDERA TIONS Thermal management is an important part of the syst em design. To ensure p roper, reliable operation, suffici ent 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 to chara cterize the ther[...]

  • Page 12

    DS_F48SA28025_1207200 7 12 MECHANICAL DRA WING Pin No. Name Function 1 2 -Vin +Vin 3 4 5 6 7 8 9 10 -ON/OFF Ne age FF Pin S ecificatio +ON/OFF +V out +V out +V out -V out -V out -V out gative input volt sitive input v Po oltage Negative Re mote ON/O Positive Re mote ON/OFF Positive output voltage Positive output voltage Positive output voltage Nega[...]

  • Page 13

    DS_F48SA28025_1207200 7 13 P ART NUMBERING SYSTEM F 48 S A 280 25 P R F A Form Factor Input V olt age Number of Output s Product Series Output Vo l t a g e Output Current ON/OFF Logic Pin Length Option Code F- Full Brick 48V S- Single A- Advanc ed 280- 28V 25- 25A P- Positive R- 0.170” F- RoHS 6/6 (Lead Free) S pace - RoHS 5/6 A - St andard Funct[...]