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Delta Electronics Q48SP manual

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Table of contents for the manual

  • Page 1

    1 FEATURES  High efficiency: 92.5 % @12V/18A  Size: 57.9x36.8x10.8mm (2.28”x1 .45”x0.43”) (w/o heatspreader) 57.9x36.8x12.7mm (2.28” x1.45”x0.50”) (with heatspreader)  Industry standard pin out  Fixed frequency operation  Fully protected: OTP, OVP, OCP, UVLO  No minimum load required  Wide output trim range: -20~+10[...]

  • Page 2

    DS_Q48SP12017_05302 008 2 TECHNICAL SPECIFICATIONS (T A =25°C, airflow rate=300 LFM, V in =48Vdc, nominal V out unless otherw ise noted; mounted on bo ard.) PARAMETER NOTES and CONDITIONS Q48SP12017NRFA Min. Ty p. Max. Units ABSOLUTE MAXIMUM RA TINGS Input Voltage Continuous -0.5 80 Vdc Transient (100ms, non-operating) 100ms 100 Vdc Operating Temp[...]

  • Page 3

    DS_Q48SP12017_05302 008 3 ELECTRICAL CHARACT ERISTICS CURVES 70 72 74 76 78 80 82 84 86 88 90 92 94 2468 1 0 1 2 1 4 1 6 1 8 OUTPUT C UR R E NT( A) EF F ICIEN CY( % ) 36V 48V 75V 0 2 4 6 8 10 12 14 16 18 20 2 4 6 8 10 12 14 16 18 O U TP UT CURRE N T(A ) LOS S (W ) 36V 48V 75V Figure 1: Efficiency vs. load c urrent fo r minimu m, nomi nal, and maxim[...]

  • Page 4

    DS_Q48SP12017_05302 008 4 ELECTRICAL CHARACTERISTICS CURVES Figure 5: Output voltage response to step-change in load current (50%-75% of Io, max: di/dt =0.1A/ µs). Load cap:1µF ceramic capacitor and 10uF T antalum capacitor. T op Trace: Vout (200mV/div), Bo ttom Trace: Iout (5 A /div). Scope measurement shoul d be made using a BNC cabl e (length [...]

  • Page 5

    DS_Q48SP12017_05302 008 5 ELECTRICAL CHARACTERISTICS CURVES Figure 9: Test set-up diagram showing measurement points for Input Terminal Ripple Current and Input Reflecte d Ripple Current. Note: Measured input reflected-ripple current with a simulated source Inductance (L TEST ) of 12 μ H. Capacitor Cs offset possible battery impedance. Meas ure cu[...]

  • Page 6

    DS_Q48SP12017_05302 008 6 ELECTRICAL CHARACTERISTICS CURVES Vo(-) Vo(+) 10u 1u Copper Strip SCOPE RESISTIV E LOAD Figure 11: Output voltage noise and ripple meas urement test setup Figure 1 2: Output voltage ripple at 36V input voltage and rated load current (50 mV/div). Load capac itance: 1µF ceramic capacitor and 10 µF tantalum capacitor. Bandw[...]

  • Page 7

    DS_Q48SP12017_05302 008 7 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 modul es and affect the stability. A low ac-impedan ce input source is recommend ed. If the source inductance is more than a fe w μ H, we advise adding a 100 μ F electrolytic capa[...]

  • Page 8

    DS_Q48SP12017_05302 008 8 FEATURES DESCRIPTIONS Over-Current Protection The modules include an inte rnal output over-current protection circuit, which will endure current limiting for an unlimited duration during output overload. If the output current exceeds the OCP set point, the modul es will automatically shut down and latch off. Over-Voltage P[...]

  • Page 9

    DS_Q48SP12017_05302 008 9 FEATURES DESCRIPTIONS (CON.) Output Voltage Adjustment (TRIM) (Not applicable to Q48SP120017Exxx) 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 17: Circuit [...]

  • Page 10

    DS_Q48SP12017_05302 008 10 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 cooling is usually the dominant mode of heat tran sfer. Hence, the choice of equipme nt [...]

  • Page 11

    DS_Q48SP12017_05302 008 11 MECHANICAL DRAWING (W ITHOUT HEATSPERADER) Pin No. Name Function 1 2 3 4 5 6 7 8 9 -Vin CASE ON/OFF +Vin +Vout +SENSE TRIM -SENSE -Vout Negative input voltage Case ground pin Remote ON/OFF Positive input voltage Positive output voltage Positive remote sense Output voltage trim Negative remote sense Negative output voltage[...]

  • Page 12

    DS_Q48SP12017_05302 008 12 Mechanical Drawing (FOR Q48SP12017Exxx)[...]

  • Page 13

    DS_Q48SP12017_05302 008 13 MECHANICAL DRAWING (WITH HEATSPREADER)[...]

  • Page 14

    DS_Q48SP12017_05302 008 14 PART NUMBERING SYSTEM Q 48 S P 120 17 N R F A Form Factor Input Voltage Number of Outputs Product Series Output Voltage Output Current ON/OFF Logic Pin Length Option Code Q - Quarter Brick 48 - 36~75V S - Single P - 200W series 120 - 12V 18A N - Negative P - Positive E - Negative and no trim, no sense pins R - 0.170” N [...]