Delta-electronics Q48SR User Manual

DATASHEET DS_Q48SR3R350_12212004 Delta Electronics, Inc.Delphi Series Q48SR, 165W Quarter Brick FamilyDC/DC Power Modules: 48V in, 3.3V/50A out Th

FEATURES DESCRIPTIONS (CON.) Output Voltage Adjustment (TRIM) To increase or decrease the output voltage set point, the modules may be connected wit

THERMAL CONSIDERATIONS Thermal management is an important part of the system design. To ensure proper, reliable operati

Q48SR3R350(Standard) Output Current vs. Ambient Temperature and Air Velocity@ Vin = 48V, Vout = 1.8V (Transverse Orientation)05101520253035404550550

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/

PART NUMBERING SYSTEM Q 48 S R 3R3 50 N R A Form Factor Input Voltage Number of Outputs Product Series Output Voltage Output Current ON/OFFLogic P

2 TECHNICAL SPECIFICATIONS (TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted; mounted on board.) PARAMETER NOTES and CON

3 ELECTRICAL CHARACTERISTICS CURVES 606570758085909510 20 30 40 50OUTPUT CURRENT (A)EFFICIENCY (%)36Vin 48Vin 75Vin0.04.08.012.016.020.024.010 20 30 4

ELECTRICAL CHARACTERISTICS CURVES 80828486889092941.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.3OUTPUT VOLTAGE (V)EFFICIENCY (%)36Vin 48Vin 75Vin10.012.014.016.0

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

6 ELECTRICAL CHARACTERISTICS CURVES Figure 13: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 12µH s

ELECTRICAL CHARACTERISTICS CURVES 0.00.51.01.52.02.53.03.50 10203040506070LOAD CURRENT (A)OUTPUT VOLTAGE (V)Vin=48V Figure 17: Output voltage vs. loa

8 9 Do not ground one of the input pins without grounding one of the output pins. This connection may allow a non-SELV voltage to appear between the

10 Vo(+)Vi(+)Vo(-)Sense(-)Sense(+)Vi(-)ON/OFF Figure 18: Remote on/off implementation Remote Sense Remote sense compensates for voltage drops on