Instruction/ maintenance manual of the product Q48SR Delta Electronics
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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.
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.
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.
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.
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.
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).
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.
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.
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.
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.
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.
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.
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.
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.
An important point after buying a device Delta Electronics Q48SR (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 Q48SR 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 Q48SR - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Delta Electronics Q48SR you will learn all the available features of the product, as well as information on its operation. The information that you get Delta Electronics Q48SR will certainly help you make a decision on the purchase.
If you already are a holder of Delta Electronics Q48SR, 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 Q48SR.
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