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FEATURES
High Efficiency: 87.5%@1.5V/15A, 3.3V/15A
Standard footprint: 57.9mmx36.8mmx8.5mm
(2.28”×1.45”×0.33”)
Industry standard pin out
2:1 input voltage range
Fixed frequency operation
Fully protected: OTP, OCP, OVP, UVLO
No minimum load required
1500 V isolation and Basic insulation
Two independent power train and separate
trim for each output
ISO 9001, TL 9000, ISO 14001, QS 9000,
OHSAS 18001 certified manufacturing facility
UL/cUL 60950 (US & Canada) Rec
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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 Q48DR1R533NRFA Min. Typ. Max. Units ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous 80 Vdc Transient (100ms) <100ms 100 Vdc Operating Temperature Please refer to figure 27 for measuring point -40 120 °C Storage Temperature -55 125 °C Input/Output Isolation Voltage 1500 Vdc INPUT CHARACTERISTICS Operating Input Voltag
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ELECTRICAL CHARACTERISTICS CURVES Figure 1: Efficiency vs. load current Iout1 for minimum, Figure 2: Efficiency vs. load current Iout2 for minimum, nominal, and maximum input voltage at 25°C, for Iout2=7.5A. nominal, and maximum input voltage at 25°C, for Iout1=7.5A Figure 3: Efficiency vs. load current Iout1 and Iout2 for Figure 4: Power dissipation vs. load current for minimum, minimum, nominal, and maximum input voltage at 25°C, for nominal, and maximum input voltage at 25°C. for I
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ELECTRICAL CHARACTERISTICS CURVES Vout2 Vout2 Vout1 Vout1 Figure 5: Turn-on transient at zero load current(2ms/div). Figure 6: Turn-on transient at full rated load current (resistive Vin=48V. Negative logic turn on. Top Trace: Vout; 1V/div; load) (2 ms/div). Vin=48V. Negative logic turn on. Top Trace: Bottom Trace: ON/OFF input: 5V/div Vout; 1V/div; Bottom Trace: ON/OFF input: 5V/div Vout2 Vout2 Vout1 Vout1 Figure 7: Turn-on transient at zero load current (2ms/div). Figure 8: Turn-on tra
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ELECTRICAL CHARACTERISTICS CURVES Ch1 Ch2 Ch3 Ch4 Figure 9: Typical full load input characteristics at room Figure 10: Output voltage response to step-change in load temperature current Iout2 (75%-50%-75% of Io, max; di/dt = 0.1A/µs) at Iout1=7.5A. Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor. Ch1=Vout2 (100mV/div), Ch2=Iout2 (7.5A/div), Ch3=Vout1 (100mV/div), Ch4=Iout1 (7.5A/div) Scope measurement should be made using a BNC cable (length shorter than 20 inches). Positi
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ELECTRICAL CHARACTERISTICS CURVES Ch1 Ch1 Ch2 Ch2 Ch3 Ch3 Ch4 Ch4 Figure 13: Output voltage response to step-change in load Figure 14: Output voltage response to step-change in load current Iout2 (75%-50%-75% of Io, max; di/dt = 2.5A/µs) at current Iout1 (75%-50%-75% of Io, max; di/dt = 2.5A/µs) at Iout1=7.5A. Load cap: 470µF, 35m Ω ESR solid electrolytic Iout2=7.5A. Load cap: 470µF, 35m Ω ESR solid electrolytic capacitor and 1µF ceramic capacitor. Ch1=Vout2 capacitor and 1µF ceramic c
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ELECTRICAL CHARACTERISTICS CURVES Figure 17: Input Terminal Ripple Current-i , at full rated c Figure 18: Input reflected ripple current-i, through a 12µH s output current and nominal input voltage with 12µH source source inductor at nominal input voltage and rated load current impedance and 33µF electrolytic capacitor (500 mA/div, (20 mA/div, 2us/div). 2us/div). Copper Strip Vo(+) SCOPE RESISTIV 10u 1u LOAD Vo(-) Figure 19: Output voltage noise and ripple measurement Figure 20: Out
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ELECTRICAL CHARACTERISTICS CURVES Figure 21: Output voltage vs. load current Iout1 showing Figure 22: Output voltage vs. load current Iout2 showing typical typical current limit curves and converter shutdown points. current limit curves and converter shutdown points. . 9 DS_Q48DR1R533_03152007
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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 The impedance of the input source connecting to the and ground. DC/DC power modules will interact with the modules and affect the stability. A low ac-impedance input The power module has extra-low voltage (ELV) outputs source is recommended. If the source inductance is when al
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FEATURES DESCRIPTIONS Over-Current Protection The modules include an internal 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 modules will automatically shut down (hiccup mode). The modules will try to restart after shutdown. If the overload condition still exists, the module will shut down again. This restart trial will continue until the overload
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FEATURES DESCRIPTIONS (CON.) Figure 25: Circuit configuration for trim-up (increase output voltage) If the external resistor is connected between the TRIM and RTN, the output voltage set point increases (Fig. 25). The external resistor value is from table below. Trim Resistor Trim Resistor (Vout Increase) (Vout Decrease) Rtrim-down [K Ω] Δ [%] Rtrim-up [K Ω] Δ [%] 1 57.4 1 70.2 2 25.5 2 31.2 3 14.9 3 18.2 4 9.57 4 11.7 5 6.38 5 7.80 6 4.26 6 5.20 7
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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/DC power modules are charac
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MECHANICAL DRAWING Pin No. Name Function 1 -Vin Negative input voltage 2 ON/OFF Remote ON/OFF 3 +Vin Positive input voltage 4 +Vout2 Positive output voltage2 5 TRIM Output voltage trim 6 Output RTN 7 +Vout1 Positive output voltage1 8 Optional Trim 2 Notes: Pins 1-8 are 1.00mm (0.040”) diameter 1 All pins are copper with Tin plating. 2 14 DS_Q48DR1R533_03152007
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PART NUMBERING SYSTEM Q 48 D R 1R5 33 N R F A Form Factor Input Number of Product Output Output ON/OFF Pin Length Option Code Voltage Outputs Series Voltage 1 Voltage 2 Logic Q – Quarter 36V~75V D- Dual R-Open frame 1R5-1.5V 33-3.3V N-Negative R-0.170” A - Standard F- RoHS 6/6 Brick Output 1R8-1.8V 50-5.0V (Default) (Default) Functions (Lead Free) 2R5-2.5V P-Positive N-0.145” (Default) 3R3-3.3V K-0.110” B - with second trim pin MODEL LIST MODEL NAME INPUT OUTPUT EFF @ Full Load
