Instruction/ maintenance manual of the product Series H48SA Delta Electronics
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1 FEATURES High efficiency: 93.2% @ 12V/ 25A Standard footprint: 58.4 x 61.0 x 1 1.2 mm (2.30” x2.40”x0.44”) Industry standard pin out Single board construction Fixed frequen.
DS_H48SA12025_05052 008 2 TECHNICAL SPECIFICATIONS (T A =25°C, airflow rate=300 LFM, V in =48Vdc, nominal Vou t unless otherwise noted.) PARAMETER NOTES and CONDITIONS H48SA12025 (Standard) Min.
DS_H48SA12025_05052 008 ELECTRICAL CHARACT ERISTICS CURVES 60 65 70 75 80 85 90 95 5 1 01 52 02 5 O UT P UT CURRENT (A) EF F IC IEN CY ( %) 36V in 75V in 48V in 0 5 10 15 20 25 30 0 5 10 15 20 25 O UT P UT CURRE NT (A ) POW ER D ISSIPATI ON ( W ) 36V in 48V in 75V in Figure 1: Efficiency vs.
DS_H48SA12025_05052 008 4 ELECTRICAL CHARACT ERISTICS CURVES 60 65 70 75 80 85 90 95 5 1 01 52 02 5 O UT P UT CURRE N T (A ) EF F IC IEN CY ( %) 36V in 75V in 48V in 0 5 10 15 20 25 30 0 5 10 15 20 25 O UT P UT CURRE NT (A ) P O WER DI S S I P A TI O N (W) 36V in 48V in 75V in Figure 5: Efficiency vs.
DS_H48SA12025_05052 008 5 ELECTRICAL CHARACTERISTICS CURVES Figure 9: Turn-on transient at zero load current, 4 ms/div; Top Trace: Vout, 5V/div; Bottom Trace: ON/OFF input , 5V/div. Figure 1 0: Output voltage response to st ep-change in load current, 200mV/div, 200us/div.
DS_H48SA12025_05052 008 ELECTRICAL CHARACTERISTICS CURVES Figure 13: Input Terminal Ripple Current, i c , at nominal input voltage and rated load curre nt with 12µH source impedanc e and 100µF electrolytic capacitor, 500 mA/div , 2us/div.
DS_H48SA12025_05052 008 7 DESIGN CONSIDERATIONS Input Source Impedance The impedance of the input sou rce connecting to the DC/DC powe r modules will intera ct with the modul es and affect the stability. A low ac-impedan ce input source is recommend ed.
DS_H48SA12025_05052 008 FEATURES DESCRIPTIONS Over-Current Protection The modules include an inte rnal output over-current protection circuit. If the output current exceed s the OCP set point, the modules will automatically shut down, a nd enter hiccup mode or latch mode, whi ch is optional.
DS_H48SA12025_05052 008 9 Figure 21: Circuit configuration for tr im-down (decrease output voltage) If the external resistor is conne cted between the T RIM and SENSE (-) the output voltage set point decrease s (Fig.
DS_H48SA12025_05052 008 THERMAL CONSIDERATIONS Thermal management is an important part of the system design. To ensure proper, rel iable operation, sufficient cooling of the p ower module is ne eded over the entire temperature range of the module. Convection cooling is usually the dominant mode of heat tran sfer.
DS_H48SA12025_05052 008 THERMAL CURVES H48SA12025(Standard) Output Current vs. Ambient Temperature and Ai r Velocity @Vin = 48V (Either Orientation) 0 5 10 15 20 25 25 30 35 40 45 50 55 60 65 70 75 80.
DS_H48SA12025_05052 008 12 MECHANICAL DRAWING (W ITHOUT HEATSPREADER) Pin No. Name Function 1 2 3 4 5 6 7 8 9 +Vin ON/OFF CASE -Vin -Vout -SENSE TRIM +SENSE +Vout Positive input voltage Remote ON/OFF .
DS_H48SA12025_05052 008 MECHANICAL DRAWING (WITH HEATSPREADER) 13.
DS_H48SA12025_05052 008 14 PART NUMBERING SYSTEM H 48 S A 120 25 N N F A Form Factor Input Voltage Number of Outputs Product Series Output Voltage Output Current ON/OFF Logic Pin Length Option Code H - Half- Brick 48V S- Single A - Advanced 120- 12V 25- 25A N - Negative P - Positive N - 0.
An important point after buying a device Delta Electronics Series H48SA (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 Series H48SA 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 Series H48SA - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Delta Electronics Series H48SA you will learn all the available features of the product, as well as information on its operation. The information that you get Delta Electronics Series H48SA will certainly help you make a decision on the purchase.
If you already are a holder of Delta Electronics Series H48SA, 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 Series H48SA.
However, one of the most important roles played by the user manual is to help in solving problems with Delta Electronics Series H48SA. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Delta Electronics Series H48SA 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
