Instruction/ maintenance manual of the product F48SA Delta Electronics
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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, .
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.
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.
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 .
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).
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).
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).
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 .
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).
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.
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.
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 vo.
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.
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If you have not bought Delta Electronics F48SA yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Delta Electronics F48SA - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Delta Electronics F48SA you will learn all the available features of the product, as well as information on its operation. The information that you get Delta Electronics F48SA will certainly help you make a decision on the purchase.
If you already are a holder of Delta Electronics F48SA, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Delta Electronics F48SA.
However, one of the most important roles played by the user manual is to help in solving problems with Delta Electronics F48SA. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Delta Electronics F48SA along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
