Instruction/ maintenance manual of the product H48SN Delta Electronics
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FEATURES High Efficiency: 91.0% @ 28V/12.5A Size: 61.0x57.9x12.7mm (2.40”×2.28”×0.50”) S tandard footprint Industry standard pin out Fixed frequency operation Metal bas.
TECHNICAL SPECIFICA TIONS (T A =25°C, airflow rate=600 LFM, V in =48Vdc, nominal V out unless otherw ise noted.) H48SN28012_01 172008 2 PA R A M E T E R NOTES and CONDITIONS H48SN28012 (St andard) Min.
ELECTRICAL CHARACTERISTICS CUR VES 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 02468 1 0 1 2 OUTPUT CURRE NT(A) POWER DISSIPATION (W) 70 75 80 85 90 95 02 46 8 1 0 1 2 OUT P UT CURRE NT (A ) EFFICIENCY (%) 1 4 36Vi n 48V i n 75Vi n 1 4 36Vin 48Vi n 75Vin Figure 1: Efficiency vs.
ELECTRICAL CHARACTERISTICS CUR VES For Negative Remote On/Off Logic Figure 4: T urn-on transi ent at full rated load current (resistive load) (10ms/div). CH3: V out;5V/ div; CH1: ON/OFF input: 2V/div Figure 5: T urn-on transient at minimum loa d current (10ms/div).
ELECTRICAL CHARACTERISTICS CUR VES Figure 8: Output voltage response to step-change in load current (75%-50% of Io, max; di/dt = 1A/10µS ) . Load cap: 330µF aluminum,10uF Low ESR capacitor and 1µF ceramic capacitor . T op T race: V out ( 100 mV/div), Bottom T race: Iout (5 A /div).
ELECTRICAL CHARACTERISTICS CUR VES Figure 1 1: Input T erminal Ripple Current, i c , at full rated output current and nominal i nput voltage with 12µH source impeda nce and 220µF electrolytic capacitor (1A/div).
ELECTRICAL CHARACTERISTICS CUR VES 0.0 5.0 10.0 15.0 20.0 25.0 30.0 02468 1 0 1 2 1 4 1 6 1 8 2 0 LOAD CURRENT ( A) OUTPUT VOLTAGE ( V) Vin=48V Figure 14: Out p ut voltage ripple at nominal input voltage and rated load current (20 mV/div). Load capacitance:330uF aluminum, 1µF ceramic capacitor and 10µFlow ESR capacitor .
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 .
H48SN28012_01 172008 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 poin t, 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 Derating Thermal management is an important part of the syst em design. To ensure p roper, 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.
H48SN28012_01 172008 12 MECHANICAL DRA WING Pin No. Name Function 1 2 3 4 -Vin CASE 5 6 7 8 9 ON/OFF SE Ne age e Pin S ecificatio gative input volt se ground Ca Remote ON/OFF Positive input voltag Pos.
H48SN28012_01 172008 13 P ART NUMBERING SYSTEM H 48 S N 280 12 N R F A Form Factor Input V oltage Number of Output s Product Series Output V oltage Output Current ON/OFF Logic Pin Length Option Code H- Half Brick 48V S- Single N- 350W series 280- 28V 12- 12.
An important point after buying a device Delta Electronics H48SN (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Delta Electronics H48SN 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 H48SN - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Delta Electronics H48SN you will learn all the available features of the product, as well as information on its operation. The information that you get Delta Electronics H48SN will certainly help you make a decision on the purchase.
If you already are a holder of Delta Electronics H48SN, 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 H48SN.
However, one of the most important roles played by the user manual is to help in solving problems with Delta Electronics H48SN. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Delta Electronics H48SN 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
