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Delta Electronics Q48SR - page 1
The Delphi Series Q48SR Quarter Brick, 48V input, adjustable single output, isolated, open frame DC/DC conv erte rs are the latest offering from a world leader in po wer system s techn ology and manufacturing — Delta Electronics, Inc. This product family provide s up to 165 watts o f power or up to 60A of output current in an industry standard fo ...
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Delta Electronics Q48SR - page 2
TECHNICAL SPECIFICATIONS (T A =25°C, airflow rate=300 LFM, V in =48Vdc, nominal Vou t unless otherw ise noted; mounted on board.) PARAMETER NOTES and CONDITIONS Q48SR1R840NR A Min. Ty p. Max. Units ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous 80 Vdc Transient (100ms) 100ms 100 Vdc Operating Temperature Refer to Figure 24 for the measuring poi ...
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Delta Electronics Q48SR - page 3
3 ELECTRICAL CHARACT ERISTICS CURVES 60 65 70 75 80 85 90 95 5 1 01 52 02 53 03 54 0 OUT PUT CURRENT (A) EFFICIENCY (%) 36Vin 48Vi n 75Vin 0.0 4.0 8.0 12.0 16.0 20.0 24.0 5 1 01 52 02 53 03 54 0 OUT PUT CURRE NT( A) POWER DISSIPATION (W) 36Vin 48Vin 75V in Figure 1: Efficiency vs. load cur rent for mi nimum, no minal, and maximum input voltage at 2 ...
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Delta Electronics Q48SR - page 4
4 Figure 7: Typical input characteristics at room temperature Figure 8: Turn-on transient at full rated load current (resistive load) (5 ms/div). Top Trace: Vout; 1V/div; Bottom Trace: ON/OFF input: 2V/div 0.0 0.5 1.0 1.5 2.0 2.5 3.0 30 35 40 45 50 55 60 65 70 75 INPUT VOL TAGE (V) INPUT CURREN (A) Io=40A Io=24A Io=4A Figure 5: Efficiency vs. outpu ...
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Delta Electronics Q48SR - page 5
5 ELECTRICAL CHARACTERISTICS CURVES Figure 9: Turn-on transient at zero load current (5 ms/div). Top Trace: Vout: 1V/div; Bottom Trace: ON/OFF input : 2V/div Figure 10: Output voltage response to step-change in loa d current (75%-50%-75% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF, tantalum capacitor and 1µF ceramic capacit or. Top Trace: Vout ...
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Delta Electronics Q48SR - page 6
6 ELECTRICAL CHARACTERISTICS CURVES Figure 13: Input Terminal Ripple Current, i c , at full rated output current and nominal input voltag e with 12µH source impedance and 33 µF electrolyt ic capacitor (500 mA/div). Figure 14: Input reflected ripple current, i s , through a 12µH source inductor at nominal in put voltage and rated load c urrent (5 ...
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Delta Electronics Q48SR - page 7
7 ELECTRICAL CHARACTERISTICS CURVES 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0 1 02 03 04 05 06 0 LOAD CURRENT (A) OUTPUT VOLTAGE (V) Vin=48V Figure 17: Output voltage vs. load current showing typical current limit curves and converter shutdow n points. ...
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Delta Electronics Q48SR - page 8
8 Do not ground one of the input pins without gro unding one of the output pins. This conne ction may allow a non-SELV voltage to appear between the output pin and ground. The power module h as extra-low voltage (ELV) outputs when all inputs are ELV. This power module is not internally fused. To a chieve optimum safety and system protection, an inp ...
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Delta Electronics Q48SR - page 9
9 Vo(+) Vi(+) Vo(-) Sense(-) Sense(+) Vi(-) ON/OFF Figure 18: Remote on/off implementation Remote Sense Remote sense compen sates for voltage drops on the output by sensing the actual output voltage at the point of load. The voltage between the remote sense pins and the output terminals must not exceed the output voltage sense range given here: [Vo ...
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Delta Electronics Q48SR - page 10
FEATURES DESCRIPTIONS (CON.) Output Voltage Adjustment (TRIM) To increase or decrea se the output voltage set poi nt, connect an external resistor betwe en the TRIM pin and either the SENSE(+) or SENSE(-). The TRIM pi n should be left open if this feature is not used. Figure 20: Circuit configuration for trim-up (increase output voltage) If the ext ...
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Delta Electronics Q48SR - page 11
11 THERMAL CURVES Figure 24: Hot spot location ＊ The allowed maximum hot spot temperature is defined at 114 ℃ 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 need ed over the entire temperature range of the module. Convection c ...
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Delta Electronics Q48SR - page 12
Figure 27: Output current vs. ambient temperature and air velocity (V in =48V, V out =1.0V, transverse orientation) Figure 26: Output current vs. ambient temperature and air velocity (V in =48V, V out =1.5V, transverse orientation) Q48SR1R840(Standard) Output Current vs. Ambien t Temperature and Air Vel ocity @ Vin = 4 8V, Vo = 1 .0V (Tr anverse Or ...
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Delta Electronics Q48SR - page 13
13 MECHANICAL DRAWING Pin No. Name Function 1 2 3 4 5 6 7 8 -Vin ON/OFF +Vin +Vout +SENSE TRIM -SENSE -Vout Negative input voltage Remote ON/OFF Positive input voltage Positive output voltage Positive remote sense Output voltage trim Negative remote sense Negative output voltage Notes: 1 2 3 Pins 1-3, 5-7 are 1.00mm (0.040”) diameter Pins 4 and 8 ...
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Delta Electronics Q48SR - page 14
14 PART NUMBERING SYSTEM The part numbering system for Delta’s Q48SR DC/DC converters hav e the follo wing format: Q 48 S R 1R8 40 N R A Form Factor Input Voltage Number of Outputs Product Series Output Voltage Output Current ON/OFF Logic Pin Length Space Option Code Q - Quarter Brick 48V S - Single R - Single Board 1R8 - 1.8V 40 - 40A N - Negati ...
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