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FEATURES
High efficiency: 88%@ ±12.1V/2.7A
Size: 57.9mm x 36.8mm x 9.7mm
(2.28”×1.45”×0.38”)
Industry standard pin out
Fixed frequency operation
Input UVLO, Output OCP, OVP, OTP
2250V isolation
No minimum load required
Adjustable output voltage
ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing
facility
UL/cUL 60950-1 (US & Canada), and TUV
(EN60950-1) - pending
Delphi Series Q48DC, 65W Quarter Brick Dual Output
DC/DC Power Modules: 48V
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TECHNICAL SPECIFICATIONS (T =25°C, airflow rate=300 LFM, V =48Vdc, nominal Vout unless otherwise noted.) A in PARAMETER NOTES and CONDITIONS Q48DC12003NR A Min. Typ. Max. Units ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous 80 Vdc Transient 100ms 100 Vdc Operating Temperature Refer to Figure 20 for measuring point -40 124 °C Storage Temperature -55 125 °C Input/Output Isolation Voltage 2250 Vdc INPUT CHARACTERISTICS Operating Input Voltage 36 48
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ELECTRICAL CHARACTERISTICS CURVES 10.2 90 9.4 87 84 8.6 81 7.8 78 75Vin 48Vin 7.0 75 6.2 72 36Vin 5.4 69 36Vin 4.6 66 48Vin 75Vin 3.8 63 60 3.0 0.3 0.7 1.1 1.5 1.9 2.3 2.7 0.3 0.7 1.1 1.5 1.9 2.3 2.7 OUTPUT CURRENT(A) OUTPUT CURRENT(A) Figure 1: Efficiency vs. load current for minimum, nominal, and Figure 2: Power dissipation vs. load current for minimum, maximum input voltage at 25°C. Io1=Io2. nominal, and maximum input voltage at 25°C. Io1=Io2. 2.5 2.3 2.1 1.9 1.7 1.5 1.3 1.1 0.9 0.
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ELECTRICAL CHARACTERISTICS CURVES Figure 4: Turn-on transient at zero load current (10ms/div). Figure 5: Turn-on transient at full rated load current (resistive load) (10 ms/div). Vin=48V. Top Trace: Vout; 5V/div; Bottom Vin=48V. Top Trace: Vout: 5V/div; Bottom Trace: ON/OFF input: 5V/div. Trace: ON/OFF input: 5V/div. Figure 7: Turn-on transient at full rated load current (resistive Figure 6: Turn-on transient at zero load current (10ms/div). load) (10 ms/div). Vin=48V. Top Trace: Vou
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ELECTRICAL CHARACTERISTICS CURVES ELECTRICAL CHARACTERISTICS CURVES 10.2 90 9.4 87 84 8.6 81 7.8 78 75Vin 48Vin 7.0 75 6.2 72 36Vin 5.4 69 36Vin 4.6 66 48Vin 75Vin 63 3.8 60 3.0 0.3 0.7 1.1 1.5 1.9 2.3 2.7 0.3 0.7 1.1 1.5 1.9 2.3 2.7 OUTPUT CURRENT(A) OUTPUT CURRENT(A) Figure 1: Efficiency vs. load current for minimum, nominal, and Figure 2: Power dissipation vs. load current for minimum, Figure 8: Output voltage response to step-change in load Figure 9: Output voltage response to st
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ELECTRICAL CHARACTERISTICS CURVES Figure 11: Input Terminal Ripple Current, i , at full rated output Figure 10: Test set-up diagram showing measurement points c current and nominal input voltage with 12µH source impedance for Input Terminal Ripple Current and Input Reflected Ripple and 33µF electrolytic capacitor (500 mA/div). Current. Note: Measured input reflected-ripple current with a simulated source Inductance (L ) of 12 μH. Capacitor Cs offset TEST possible battery impedan
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ELECTRICAL CHARACTERISTICS CURVES Copper Strip Vo(+) SCOPE RESISTIV 10u 1u LOAD Vo(-) Figure 13: Output voltage noise and ripple measurement Figure 14: Output voltage ripple at nominal input voltage test setup. (Vin=48V) and rated load current (Io1=Io2=2.7A,20 mV/div). Load capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz. (See Figure 13). Scope measurement should be made using a BNC cable (length short than 20 inch). Position the load between 51 mm and
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DESIGN CONSIDERATIONS Do not ground one of the input pins without grounding Input Source Impedance one of the output pins. This connection may allow a non-SELV voltage to appear between the output pin and The impedance of the input source connecting to the ground. DC/DC power modules will interact with the modules and affect the stability. A low ac-impedance input source The power module has extra-low voltage (ELV) outputs is recommended. If the source inductance is more than w
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FEATURES DESCRIPTIONS Over-Current Protection Vi(+) Vo(+) The modules include an internal output over-current protection circuit, which will endure current limiting for Trim an unlimited duration during output overload. If the ON/OFF output current exceeds the OCP set point, the modules will automatically shut down (hiccup mode). Rtn The modules will try to restart after shutdown. If the Vi(-) Vo(-) overload condition still exists, the module will shut down again. This restart tri
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FEATURES DESCRIPTIONS (CON.) If the external resistor is connected between the TRIM and Output Voltage Adjustment (TRIM) Rtn the output voltage set point increases (Fig.18). The external resistor value required to obtain a percentage To increase or decrease the output voltage set point, output voltage change △% is defined as: the modules may be connected with an external resistor between the TRIM pin and either the Vo(+) or 197 Rtrim −up = () K Ω Vo(-). The TRIM pin should be l
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THERMAL CONSIDERATIONS THERMAL CURVES Thermal management is an important part of the system design. To ensure proper, reliable operation, sufficient cooling of the power module is needed over the entire temperature range of the module. Convection cooling is usually the dominant mode of heat transfer. Hence, the choice of equipment to characterize the thermal performance of the power module is a wind tunnel. Thermal Testing Setup Delta’s DC/D
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MECHANICAL DRAWING Pin No. Name Function 1 +Vin Positive input voltage 2 ON/OFF Remote ON/OFF 3 -Vin Negative input voltage 4 -Vout Negative output voltage 5 GND Ground 6 Trim Output voltage trim 7 +Vout Positive output voltage DS_Q48DC12003_03112008 12
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PART NUMBERING SYSTEM Q 48 D C 120 03 N R F A Product Input Number of Product Output Output ON/OFF Pin Option Code Type Voltage Outputs Series Voltage Current Logic Length Q - Quarter 48V D - Dual C - 2nd 120 - 12.1V 03 - 2.7A N - Negative R - 0.150” A - Standard F- RoHS 6/6 Brick Output generation of P - Positive Functions (Lead Free) bipolar dual output MODEL LIST MODEL NAME INPUT OUTPUT EFF @ 100% LOAD Q48DC12003NR A 36V~75V 2.4A ±12.1V 2.7A 88%
