Instruction/ maintenance manual of the product Q48DR Delta Electronics
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DATASHEET DS_Q48DR1R533_0315 2007 Delphi Series Q48DR, 87W-100W, Quarter Brick Dual Output, DC/DC Power Modules: 48V in, 1.5V and 3.3V, 15A out each channel The Delphi Series Q48DR Quarter Brick Dual,.
DS_Q48DR1R533_0 3152007 TECHNICAL SPECIFICATIONS (T A =25°C, airflow rate=300 LFM, V in =48Vdc, nomi nal Vout unless o therwise noted.) PARAMETER NOTES and CONDITIONS Q48DR1R533NRFA Min.
ELECTRICAL CHARACT ERISTICS CURVES Figure 1: Efficiency vs. load current Iout1 for minimum, nominal, and maxi mum input voltage at 2 5 ° C, for Iout2=7.5A. Figure 2: Efficiency vs. load current Iout2 for minimum, nominal, and maxi mum input voltage at 2 5 ° C, for Iout1=7.
DS_Q48DR1R533_0 3152007 5 ELECTRICAL CHARACT ERISTICS CURVES Figure 5: Turn-on transient at zero load current(2ms/div). Vin=48V. Negative logic turn on. To p Trace: Vout; 1V/div; Bottom Trace: ON/OFF input: 5V/div Figure 6: Turn-on transient at full ra ted load current (resistive load) (2 ms/div).
DS_Q48DR1R533_0 3152007 6 ELECTRICAL CHARACTERISTICS CURVES Figure 9: Typical full load input characteristics at room temperature Figure 10: Output voltage response to s tep-change in loa d current Iout2 (75%-50%-75% of Io, max; di/dt = 0.1A/ µs) at Iout1=7.
DS_Q48DR1R533_0 3152007 7 ELECTRICAL CHARACT ERISTICS CURVES Figure 13: Output voltage response to step-change in load current Iout2 (75%-50%-75% of Io, max; di/dt = 2.5A/ µs) at Iout1=7.5A. Load cap: 470 µF, 35m Ω ESR solid electrolytic capacitor and 1µF ceramic capacitor.
DS_Q48DR1R533_0 3152007 8 ELECTRICAL CHARACT ERISTICS CURVES Figure 17: Input Terminal Ripple Current-i c , at full rated output current and nominal input voltage w ith 12µH source impedance and 33 µF electrolytic capacitor (500 mA/d iv, 2us/div).
DS_Q48DR1R533_0 3152007 9 ELECTRICAL CHARACT ERISTICS CURVES Figure 21: Output voltage vs. load current Iout1 showing typical current limit curves and converter shutdow n poi nts. Figure 22: Output voltage vs. load curr ent Iout2 showing typical current limit curves and converter shutdow n points.
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 modules 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 10 to 100 µ F electrolytic capacitor (ESR < 0.
DS_Q48DR1R533_0 3152007 11 Figure 23: Remote on/off implementation Output Voltage Adjustment (TRIM) To increase or decrea se the output voltage set poi nt, the modules may be connected wit h an external resistor between the TRIM pin and eit her Vout1(+) or RTN.
DS_Q48DR1R533_0 3152007 12 FEATURES DESCRIPTIONS (CON.) Figure 25: Circuit configuration for trim-up (increase output voltage) If the external resistor is conne cted between the T RIM and RTN, the output voltage set point increase s (Fig. 25). The external resistor value is from table below.
DS_Q48DR1R533_0 3152007 Note: Win d Tunnel Tes t Setup Fi gure Di mensions are in millim eters and (I nche s) 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.
DS_Q48DR1R533_0 3152007 14 MECHANICAL DRAWING Pin No. Name Function 1 2 3 4 5 6 7 8 -Vin ON/OFF +Vin +Vout2 TRIM Output RTN +Vout1 Optional Negative input voltage Remote ON/OFF Positive input voltage Positive output voltage2 Output voltage trim Positive output voltage1 Trim 2 Notes: 1 2 Pins 1-8 are 1.
DS_Q48DR1R533_0 3152007 15 PART NUMBERING SYSTEM Q 48 D R 1R5 33 N R F A Form Factor Input Voltage Number of Outputs Product Series Output Voltage 1 Output Voltage 2 ON/OFF Logic Pin Length Option Code Q – Quarter Brick 36V~75V D- Dual Output R-Open frame 1R5-1.
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