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Delphi Series Q48SR, 165W Quarter Brick Family
DC/DC Power Modules: 48V in, 1.8V/40A out
The Delphi Series Q48SR Quarter Brick, 48V input, adjustable single
output, isolated, open frame DC/DC converters are the latest offering
from a world leader in power systems technology and manufacturing —
Delta Electronics, Inc. This product family provides up to 165 watts of
power or up to 60A of output current in an industry standard footprint.
This product represents the next generation of design technology which
may be utilized to provide high levels of current at very low output
voltages required by today's leading-edge circuitry. Utilizing an
advanced patented thermal and electrical design technology; the Delphi
Series Q48SR converters are capable of providing higher output current
capability with excellent transient response and lower common mode
noise. Featuring a wide operating output voltage range and high current
at low output voltages, these units offer more useable power over a
wide range of ambient operating conditions. The wide range trimmable
output feature allows the user to both reduce and standardize part
numbers across different and/or migrating voltage requirements. This
model covers the output range of 0.8V to 1.9V at 40A.
Datasheet
DS_Q48SR1R840_12212004
FEATURES
High efficiency: 87% @ 1.8V/40A
Standard footprint:
57.9x36.8x10.2mm (2.28"x1.45"x0.40")
Industry standard pin out
Fixed frequency operation
Wide output trim range: 0.8V~1.9V
Fully protected: OTP, OVP, OCP, UVLO
No minimum load required
Fast transient response
Start up into pre-biased load
Basic insulation
ISO 9000, TL 9000, ISO 14001 certified
manufacturing facility
UL/cUL 60950 (US & Canada) Recognized,
and TUV (EN60950) Certified
CE mark meets 73/23/EEC and 93/68/EEC
directives
OPTIONS
Short lead lengths
Non-latching over voltage protection
Negative trim
Positive on/off logic
APPLICATIONS
Telecom/DataCom
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial/Test Equipment
Delta Electronics, Inc.
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Summary of Contents for Delta Electronics Q48SR
- Page 1 DC/DC converters are the latest offering from a world leader in power systems technology and manufacturing — Delta Electronics, Inc. This product family provides up to 165 watts of power or up to 60A of output current in an industry standard footprint.
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Page 2: Technical Specifications
TECHNICAL SPECIFICATIONS =25°C, airflow rate=300 LFM, V =48Vdc, nominal Vout unless otherwise noted; mounted on board.) PARAMETER ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous Transient (100ms) Operating Temperature Storage Temperature Input/Output Isolation Voltage INPUT CHARACTERISTICS Operating Input Voltage Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Lockout Hysteresis Voltage... - Page 3 ELECTRICAL CHARACTERISTICS CURVES 36Vin 48Vin Figure 1: Efficiency vs. load current for minimum, nominal, and maximum input voltage at 25°C. (Vout=1.8V) 36Vin 48Vin Figure 3: Efficiency vs. load current for minimum, nominal, and maximum input voltage at 25°C. (Vout=0.8 V) 24.0 75Vin 20.0...
- Page 4 ELECTRICAL CHARACTERISTICS CURVES 36Vin 48Vin Figure 5: Efficiency vs. output voltage for minimum, nominal, and maximum input voltage at 25°C. (Iout=40A) Io=40A Figure 7: Typical input characteristics at room temperature 15.0 14.0 13.0 12.0 11.0 10.0 75Vin OUTPUT VOLTAGE (V) Figure 6: Power dissipation vs.
- Page 5 ELECTRICAL CHARACTERISTICS CURVES Figure 9: Turn-on transient at zero load current (5 ms/div). Top Trace: Vout: 1V/div; Bottom Trace: ON/OFF input: 2V/div Figure 11: Output voltage response to step-change in load current (75%-50%-75% of Io, max: di/dt = 2.5A/µs). Load Ω...
- Page 6 ELECTRICAL CHARACTERISTICS CURVES Figure 13: Input Terminal Ripple Current, i output current and nominal input voltage with 12µH source impedance and 33µF electrolytic capacitor (500 mA/div). Copper Strip Vo(+) SCOPE Vo(-) Figure 15: Output voltage noise and ripple measurement test setup , at full rated Figure 14: Input reflected ripple current, i source inductor at nominal input voltage and rated load current...
- Page 7 ELECTRICAL CHARACTERISTICS CURVES Vin=48V Figure 17: Output voltage vs. load current showing typical current limit curves and converter shutdown points. LOAD CURRENT (A)
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Page 8: Design Considerations
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 <... -
Page 9: Features Descriptions
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. - Page 10 FEATURES DESCRIPTIONS (CON.) Output Voltage Adjustment (TRIM) To increase or decrease the output voltage set point, connect an external resistor between the TRIM pin and either the SENSE(+) or SENSE(-). The TRIM pin should be left open if this feature is not used. Figure 20: Circuit configuration for trim-up (increase output voltage) If the external resistor is connected between the TRIM...
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Page 11: Thermal Considerations
THERMAL CONSIDERATIONS 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 THERMAL CURVES (CON.) Q48SR1R840(Standard) Output Current vs. Ambient Temperature and Air Velocity @ Vin = 48V, Vo = 1.8V (Tranverse Orientation) Output Current(A) Natural Convection 100LFM 200LFM 300LFM 400LFM 500LFM 600LFM Figure 25: Output current vs. ambient temperature and air velocity (V =48V, V =1.8V, transverse orientation)
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Page 13: Mechanical Drawing
MECHANICAL DRAWING Pin No. Name Function -Vin Negative input voltage ON/OFF Remote ON/OFF +Vin Positive input voltage +Vout Positive output voltage +SENSE Positive remote sense TRIM Output voltage trim -SENSE Negative remote sense -Vout Negative output voltage Notes: Pins 1-3, 5-7 are 1.00mm (0.040”) diameter Pins 4 and 8 are 1.50mm (0.060”) diameter All pins are copper with tin plating... -
Page 14: Part Numbering System
PART NUMBERING SYSTEM The part numbering system for Delta’s Q48SR DC/DC converters have the following format: Form Factor Input Number of Voltage Outputs Q - Quarter S - Single Brick MODEL LIST MODEL NAME INPUT Q48SR1R840NR A 36V~75V Q48SR1R860NR A...
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