User's Manual

ManualsBrandsDelta ManualsPower SupplyDelta Series Q48DR

DATASHEET

DS_Q48DR1R833_03162007

Delphi Series Q48DR, 87W-100W, Quarter Brick

Dual Output, DC/DC Power Modules:

48V in, 1.8V and 3.3V, 15A out each channel

The Delphi Series Q48DR Quarter Brick Dual, 48V input, dual output,

isolated DC/DC converters are latest offering from one of the world’s

largest power supply manufacturers — Delta Electronics, Inc. This

product family provides up to 100 watts of power or 15A of output current

(each channel simultaneously) in an industry standard footprint. Both

output channels can be used independently of each other with option to

trim each channel either in the same direction or in reversion direction.

With creative design technology and optimized circuit, these converters

possess outstanding electrical and thermal performance, as well as

extremely high reliability under highly stressful operating conditions. All

the models are fully protected from abnormal input/output voltage,

current, and temperature conditions. The Delphi Series converters meet

all safety requirements with basic insulation.

APPLICATIONS

 Telecom/DataCom

 Wireless Networks

 Optical Network Equipment

 Server and Data Storage

 Industrial/Test Equipment

OPTIONS

 Optional second trim pin for

independent trim of the two outputs

 Positive On/Off logic

 Short pin lengths available

FEATURES

 High Efficiency: 88%@ 1.8V/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, QS9000,

OHSAS18001 certified manufacturing

facility

 UL/cUL 60950 (US & Canada) Recognized,

and TUV (EN60950) Certified

 CE mark meets 73/23/EEC and 93/68/EEC

directives

Summary of content (13 pages)

PAGE 1
FEATURES High Efficiency: 88%@ 1.8V/15A, 3.3V/15A Standard footprint:57.9mmx36.8mmx8.5mm (2.28”×1.45”×0.
PAGE 2
TECHNICAL SPECIFICATIONS (T =25°C, airflow rate=300 LFM, V A PARAMETER in =48Vdc, nominal Vout unless otherwise noted.) NOTES and CONDITIONS Q48DR1R833NRFA Min.
PAGE 3
ELECTRICAL CHARACTERISTICS CURVES Figure 1: Efficiency vs. load current Iout1 for minimum, nominal, and maximum input voltage at 25°C, for Iout2=7.5A. Figure 2: Efficiency vs. load current Iout2 for minimum, nominal, and maximum input voltage at 25°C, for Iout1=7.5A Figure 3: Efficiency vs. load current Iout1 and Iout2 for minimum, nominal, and maximum input voltage at 25°C, for Iout1=Iout2 Figure 4: Power dissipation vs. load current for minimum, nominal, and maximum input voltage at 25°C.
PAGE 4
ELECTRICAL CHARACTERISTICS CURVES Vout2 Vout1 Figure 5: Turn-on transient at zero load current(2ms/div). Vin=48V. Negative logic turn on. Top Trace: Vout; 1V/div; Bottom Trace: ON/OFF input: 5V/div Vout2 Vout1 Figure 7: Turn-on transient at zero load current (2ms/div). Vin=48V. Positive logic turns on. Top Trace: Vout; 1V/div; Bottom Trace: ON/OFF input: 5V/div Vout2 Vout1 Figure 6: Turn-on transient at full rated load current (resistive load) (2 ms/div). Vin=48V. Negative logic turn on.
PAGE 5
ELECTRICAL CHARACTERISTICS CURVES ELECTRICAL CHARACTERISTICS CURVES Ch1 Ch1 Ch1 Ch2 Ch2 Ch2 Ch3 Ch3 Ch4 Ch3 Ch4 Ch4 6 Figure 9: Output voltage response to step-change in load Fcurrent igure 9: Typical full load input at room at Iout2 (75%-50%-75% of Io,characteristics max; di/dt = 2.5A/µs) teIout1=7.5A. mperature Load cap: 470µF, 35mΩ ESR solid electrolytic capacitor and 1µF ceramic capacitor. Ch1=Vout2 (100mV/div), Ch2=Iout2 (7.5A/div), Ch3=Vout1 (100mV/div), Ch4=Iout1 (7.
PAGE 6
ELECTRICAL CHARACTERISTICS CURVES Figure 13: Input Terminal Ripple Current-ic, at full rated output current and nominal input voltage with 12µH source impedance and 33µF electrolytic capacitor (500 mA/div, 2us/div). Figure 14: Input reflected ripple current-is, through a 12µH source inductor at nominal input voltage and rated load current (20 mA/div, 2us/div).
PAGE 7
ELECTRICAL CHARACTERISTICS CURVES Figure 17: Output voltage vs. load current Iout1 showing typical current limit curves and converter shutdown points. Figure 18: Output voltage vs. load current Iout2 showing typical current limit curves and converter shutdown points.
PAGE 8
DESIGN CONSIDERATIONS Input Source Impedance The impedance of the input source connecting to the DC/DC power modules will interact with the modules and affect the stability. A low ac-impedance input source is recommended. If the source inductance is more than a few µH, we advise adding a 10 to 100 µF electrolytic capacitor (ESR < 0.7 Ω at 100 kHz) mounted close to the input of the module to improve the stability.
PAGE 9
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 condition is corrected.
PAGE 10
FEATURES DESCRIPTIONS (CON.) Figure 21: 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. 21). The external resistor value is from table below. Trim Resistor (Vout Increase) Trim Resistor (Vout Decrease) Δ [%] Rtrim-up [KΩ] Δ [%] Rtrim-down [KΩ] 1 2 3 4 5 6 7 8 9 10 57.4 25.5 14.9 9.57 6.38 4.26 2.47 1.60 709 0 1 2 3 4 5 6 7 8 9 10 70.2 31.2 18.2 11.7 7.80 5.20 3.34 1.
PAGE 11
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.
PAGE 12
MECHANICAL DRAWING Pin No. 1 2 3 4 5 6 7 8 Notes: 1 2 Name Function -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 TRIM2 Pins 1-8 are 1.00mm (0.040”) diameter All pins are copper with Tin plating.
PAGE 13
PART NUMBERING SYSTEM Q 48 D R Form Factor Input Voltage Number of Outputs Product Series Q – Quarter Brick 48 - 36-75V D-Dual Output R-Open frame 1R8 33 Output Output Voltage 1 Voltage 2 2R5-2.5V 3R3-3.3V 1R8-1.8V 1R5-1.5V 33-3.3V 50-5.0V N R ON/OFF Logic Pin Length N-Negative (Default) P-Positive R-0.170” (Default) N-0.145” K-0.