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Delta Electronics Series E48SH - page 1
FEATURES High efficiency: 92.0% @3.3V/30A Size: 58.4mm x 22.8mm x9.5mm (2.30”x0.90”x0.37”) Industry standard pin out Fixed frequency operation Input UVLO, Output OTP , OCP , OVP Monotonic startup into normal and pre-biased loads Secondary control, very fast transient response 2250V Isolation and basic insulatio ...
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Delta Electronics Series E48SH - page 2
TECHNICAL SPECIFICA TIONS (T A =25°C, airflow rate=300 LFM, V in =48Vdc, nominal V out unless otherw ise noted.) PA R A M E T E R NOTES and CONDITIONS E48SH3R330 (St andard) Min. T y p. Max. Un its ABSOLUTE MAXIMUM RA TINGS Input V oltage Continuous 75 Vdc T ransient (100ms) 100ms 100 Vdc Operating T emperature Refer to Figure 21 for mea suring po ...
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Delta Electronics Series E48SH - page 3
E48SH3R330_0216200 7 3 ELECTRICAL CHARACTERISTICS CUR VES Figure 1: Efficiency vs. load current for minimum, nominal, and maximum in put voltage at 25°C Figure 2: Power dissipation vs. load current for min imum, nominal, and max i mum input voltage at 25°C. Figure 3: T ypical full l oad input characteristics at room temperature 0 0.5 1 1.5 2 2.5 ...
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Delta Electronics Series E48SH - page 4
ELECTRICAL CHARACTERISTICS CUR VES E48SH3R330_0216200 7 4 For Negative Remote On/Off Logic Figure 4: T urn-on transient at zero load current (5 ms/div). Vin=48V .T op T race: V out, 2V/div; Bottom T race: ON/OF F input, 2V/div Figure 5: T urn-on transient a t full ra ted load current (constant current load) (5 ms/div). Vin=48V .T op T race: Vout, 2 ...
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Delta Electronics Series E48SH - page 5
ELECTRICAL CHARACTERISTICS CUR VES E48SH3R330_0216200 7 5 Figure 8: Output voltage response to step-change in load current (75%-50% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF , tantalum capacitor and 1µF ceramic capa citor. T race: Vout (50mV/div , 100us/div ) , Scope measureme nt should be made using a BNC cable (length shorte r than 20 inche ...
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Delta Electronics Series E48SH - page 6
ELECTRICAL CHARACTERISTICS CUR VES Figure 12: Input reflected ripple current, i s , through a 12µH source inductor at nominal input voltage an d rated load current (20 mA/div , 2us/div). Figure 13: Output voltage noise and ripple me asurement test setup Figure 14: Output voltage ripple at nominal input voltage and rated load current (Io=30A)(50 mV ...
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Delta Electronics Series E48SH - page 7
DESIGN CONSIDERA TIONS Input Source Impedance The impedance of the input source co nnecting to the DC/DC powe r modules will interact with the modul es and affect the st ability . A low ac-impedance input source is recommended. If the source induct ance is more than a few µ H, we advise adding a 10 µ F to 100 µ F electrolytic capa citor (ESR < ...
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Delta Electronics Series E48SH - page 8
FEA TURES DESCRIPTIONS Over-Current Protection The E48SH modules include an internal output over-current protection circuit, which will endure current limiting for an unlimited duration du ring output overload. When the output current exce eds the OCP set point, the current limit function will work by initially reduce duty cycle of the module, the ...
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Delta Electronics Series E48SH - page 9
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 18: Circuit configuration for trim-down (decrea ...
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Delta Electronics Series E48SH - page 10
E48SH3R330_0216200 7 10 THERMAL CONSIDERA TIONS Thermal management is an importa nt part of the system design. To ensure prop er, reliable operation, sufficient 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 ...
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Delta Electronics Series E48SH - page 11
P I C K A N D P L A C E L O C A T I O N S U R F A C E - M O U N T T A P E & R E E L RECOMMENDED P AD LA YOUT (SMD) E48SH3R330_0216200 7 11 ...
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Delta Electronics Series E48SH - page 12
LEADED (Sn/Pb) PROCESS RECOMMEND TEMP . PROFILE T ime ( sec. ) Pre-h eat tem p. 140~180 ° C 60~120 sec. Peak tem p. 210~230 ° C 5sec . Ramp-up te mp. 0.5~3.0 ° C /sec . T emperature ( ° C ) 50 100 150 200 250 300 60 0 120 180 240 2nd Ramp-up temp. 1.0~3.0 ° C /sec. Over 200 ° C 40~50sec. Coolin g down ra te <3 ° C /se c. Note: The tempera ...
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Delta Electronics Series E48SH - page 13
MECHANICAL DRA WING SURF ACE-MOUNT MODULE T H R O U G H - H O L E M O D U L E Pin No. Name Function 1 2 3 4 5 6 7 8 +Vin ON/OFF -Vin -V out -SENSE TRIM +SENSE +V out Positive input voltage Remote ON/OFF Negative input voltage Negative output voltage Negative remote sense Output voltage trim Positive remote sense Positive output voltage E48SH3R330_0 ...
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Delta Electronics Series E48SH - page 14
MECHANICAL DRA WING (WITH HEA TSPREADER) THROUGH-HOLE MODULE E48SH3R330_0216200 7 14 ...
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Delta Electronics Series E48SH - page 15
E48SH3R330_0216200 7 15 P ART NUMBERING SYSTEM E 48 S H 3R3 30 N R F A T ype of Product Input V oltage Number of Output s Product Series Outp ut Vo l t a g e Output Current ON/OFF Logic Pin Length Option Code E- Eighth Brick 48-36V~75V S- Single H-50A series 3R3 - 3.3V 30 - 30A N- Negative P- Positive R- 0.170” N- 0.145” K- 0.1 10” M- SMD F- ...
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