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Delta Electronics Series H48SA manual

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Table of contents for the manual

  • Page 1

    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 frequency operation  2250V Isolation  Basic insulation  Monotonic startup into normal and pre- bias loads  Fully protected: input UVLO, output OV[...]

  • Page 2

    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. Ty p . Max. Units ABSOLUTE MAXIMUM RA TINGS Input Voltage Continuous 80 Vdc Transient (100ms) 100ms 100 Vdc Operating Device Temperatur e(Openframe) Pleas[...]

  • Page 3

    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. load cur rent for mi nimum, no minal, and maximum input v[...]

  • Page 4

    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. output voltage for minimu m, nominal, and maxim[...]

  • Page 5

    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. 75%-50%-75% of Io, max, di/dt = 0.1 A /µs. Load cap: 10µF, tantalum capacit[...]

  • Page 6

    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. Figure 14: Input reflected ripple current, i s , through a 12µH source inductor at nominal input voltage and[...]

  • Page 7

    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. If the source inductance is more than a few μ H, we advise adding a 33 to 100 μ F electrolytic[...]

  • Page 8

    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. For hiccup mode, the module will try to restart after shu[...]

  • Page 9

    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. 21). The external re sistor value req uired to obtain a percentage of output voltage change △ % is defined as: Rtrim_down 100 Δ 2 [...]

  • Page 10

    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. Hence, the choice of equipme nt to [...]

  • Page 11

    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 85 Natur al Convection 100LFM 300LFM 200LFM Ambient Temperature ( ℃ ) Output Current ( A) 600LFM 500LFM 400LFM Figure 24: Temperature measurement l[...]

  • Page 12

    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 Case pin Negative input voltage Negative output voltage Negative remote sense Output voltage trim Positive remote sense Positive output voltage Notes:[...]

  • Page 13

    DS_H48SA12025_05052 008 MECHANICAL DRAWING (WITH HEATSPREADER) 13[...]

  • Page 14

    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 - 0.145” F- RoHS 6/6 (Lead Free) A - Standard Functions H - wi[...]