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FEATURES
High Efficiency: 87.5%@1.5V/15A, 3.3V/15A Standard footprint: 57.9mmx36.8mmx8.5mm (2.28"x1.45"x0.33") 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) Recognized, and TUV (EN60950) Certified CE mark meets 73/23/EEC and 93/68/EEC directives
Delphi Series Q48DR, 87W-100W, Quarter Brick Dual Output, DC/DC Power Modules: 48V in, 1.5V and 3.3V, 15A out each channel
The Delphi Series Q48DR Quarter Brick Dual, 48V input, dual output, isolated DC/DC converters are the latest offering from a world leader in power system and technology and manufacturing -- 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.
OPTIONS
Optional second trim pin for independent trim of the two outputs. Positive On/Off logic Short pin lengths available
APPLICATIONS
Telecom/DataCom Wireless Networks Optical Network Equipment Server and Data Storage Industrial/Test Equipment
DATASHEET DS_Q48DR1R533_03152007
1
TECHNICAL SPECIFICATIONS (T =25C, airflow rate=300 LFM, V
A
in
=48Vdc, nominal Vout unless otherwise noted.)
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 Maximum Input Current No-Load Input Current Off Converter Input Current Inrush Current(I2t) Input Reflected-Ripple Current Input Voltage Ripple Rejection OUTPUT CHARACTERISTICS Output Voltage Set Point Output Voltage Regulation Over Load Over Line Cross Regulation Over Temperature Total Output Voltage Range Output Voltage Ripple and Noise Peak-to-Peak RMS Operating Output Current Range Output DC Current-Limit Inception DYNAMIC CHARACTERISTICS Output Voltage Current Transient Positive Step Change in Output Current Negative Step Change in Output Current Cross dynamic Settling Time (within 1% Vout nominal) Turn-On Transient Start-up Time, From On/Off Control Start-up Time, From Input Maximum Output Capacitance EFFICIENCY 100% Load 60% Load ISOLATION CHARACTERISTICS Input to Output Isolation Resistance Isolation Capacitance FEATURE CHARACTERISTICS Switching Frequency ON/OFF Control, (Logic Low-Module ON) Logic Low Logic High ON/OFF Current Leakage Current Output Voltage Trim Range Output Over-Voltage Protection GENERAL SPECIFICATIONS MTBF Weight Over-Temperature Shutdown
NOTES and CONDITIONS
Q48DR1R533NRFA
Min. Typ. Max. 80 100 120 125 48 34 32 2 100 5 0.015 10 50 75 35 33 3 2.7 150 10 Units Vdc Vdc C C Vdc Vdc Vdc Vdc Vdc A mA mA A2s mA dB Vdc mV V mV V V mV mV A
<100ms Please refer to figure 27 for measuring point
-40 -55 1500 36 33 31 1
100%load, 36Vin
P-P thru 12H inductor, 5Hz to 20MHz 120Hz Vin=48V, Io=Io.max, Tc=25 Io1=Io, min to Io, max, Io2=0A Io2=Io, min to Io, max, Io1=0A Vin=36V to 75V,Io1=Io2=full load Worse Case Tc=-40 to 85 Over sample load, line and temperature 5Hz to 20MHz bandwidth Io1, Io2 Full Load, 1F ceramic, 10F tantalum Io1, Io2 Full Load, 1F ceramic, 10F tantalum Vout 1 Vout 2 Vout 1 Vout 2 Vout 1 Vout 2 Vout 1 Vout 2 Vout 1 Vout 2 1.455 3.201 Vout 1 Vout 2 Vout 1 Vout 2 Vout 1 Vout 2 1.476 3.247
1.500 3.300 5 3 5 15
1.524 3.353 10 10 10 50 1.545 3.399 80 80 30 30 15 15 150% 150%
40 40 10 10 0 0 100% 100% 100 100 100 100
48V, 10F Tan & 1F Ceramic load cap, 0.1A/s Vout 1 Iout1from 50% Io, max to 75% Io, max Vout 2 Vout 1
Iout2 from 75% Io, max to 50% Io, max Vout 2
mV mV 20 mV US MS mS F % % Vdc M pF kHz 0.8 18 1 50 +10 130 V V mA uA % % Mhours grams C
Each channel independence 150 10 10 Full load; 5% overshoot of Vout at startup Iout1, Iout2 full load, 48vdc Vin Iout1, Iout2 60% of full load, 48vdc Vin 1500 10 3000 350 Von/off at Ion/off=1.0mA Von/off at Ion/off=0.0 A Ion/off at Von/off=0.0V Logic High, Von/off=15V Pout max rated power Over full temp range; %of nominal Vout Io=80% of Io, max; Ta=25C 300LFM Please refer to figure 27 for measuring point 0 Vout 1 Vout 2 87.5 88
15 15 10000 10000
-10 115
122 2.5 26.5 128
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DS_Q48DR1R533_03152007
ELECTRICAL CHARACTERISTICS CURVES
Figure 1: Efficiency vs. load current Iout1 for minimum, nominal, and maximum input voltage at 25C, for Iout2=7.5A.
Figure 2: Efficiency vs. load current Iout2 for minimum, nominal, and maximum input voltage at 25C, for Iout1=7.5A
Figure 3: Efficiency vs. load current Iout1 and Iout2 for minimum, nominal, and maximum input voltage at 25C, for Iout1=Iout2
Figure 4: Power dissipation vs. load current for minimum, nominal, and maximum input voltage at 25C. for Iout1=Iout2
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DS_Q48DR1R533_03152007
ELECTRICAL CHARACTERISTICS CURVES
Vout2
Vout2
Vout1
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
Figure 6: Turn-on transient at full rated load current (resistive load) (2 ms/div). Vin=48V. Negative logic turn on. Top Trace: 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). Vin=48V. Positive logic turns on. Top Trace: Vout; 1V/div; Bottom Trace: ON/OFF input: 5V/div
Figure 8: Turn-on transient at full load current (2ms/div). Vin=48V. Positive logic turns on. Top Trace: Vout; 1V/div; Bottom Trace: ON/OFF input: 5V/div
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DS_Q48DR1R533_03152007
ELECTRICAL CHARACTERISTICS CURVES
Ch1
Ch2
Ch3
Ch4
Figure 9: Typical full load input characteristics at room temperature
Figure 10: Output voltage response to step-change in load current Iout2 (75%-50%-75% of Io, max; di/dt = 0.1A/s) at Iout1=7.5A. Load cap: 10F, tantalum capacitor and 1F 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). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module.
Ch1
Ch1
Ch2
Ch2
Ch3
Ch3
Ch4
Ch4
Figure 11: Output voltage response to step-change in load current Iout1 (75%-50%-75% of Io, max; di/dt = 0.1A/s) at Iout2=7.5A. Load cap: 10F, tantalum capacitor and 1F 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). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module.
Figure 12: Output voltage response to step-change in load current Iout2 and Iout1 (75%-50%-75% of Io, max; di/dt = 0.1A/s). Load cap: 10F, tantalum capacitor and 1F 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). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module.
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DS_Q48DR1R533_03152007
ELECTRICAL CHARACTERISTICS CURVES
Ch1 Ch1
Ch2
Ch2
Ch3
Ch3
Ch4
Ch4
Figure 13: Output voltage response to step-change in load current Iout2 (75%-50%-75% of Io, max; di/dt = 2.5A/s) at Iout1=7.5A. Load cap: 470F, 35m ESR solid electrolytic capacitor and 1F ceramic capacitor. Ch1=Vout2 (200mV/div), Ch2=Iout2 (7.5A/div), Ch3=Vout1 (200mV/div), Ch4=Iout1 (7.5A/div) Scope measurement should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module.
Figure 14: Output voltage response to step-change in load current Iout1 (75%-50%-75% of Io, max; di/dt = 2.5A/s) at Iout2=7.5A. Load cap: 470F, 35m ESR solid electrolytic capacitor and 1F ceramic capacitor. Ch1=Vout2 (200mV/div), Ch2=Iout2 (7.5A/div), Ch3=Vout1 (200mV/div), Ch4=Iout1 (7.5A/div) Scope measurement should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module.
Ch1
Ch2
Ch3
Ch4
Figure 15: Output voltage response to step-change in load current Iout2 and Iout1 (75%-50%-75% of Io, max; di/dt = 2.5A/s). Load cap: 470F, 35m ESR solid electrolytic capacitor and 1F ceramic capacitor. Ch1=Vout2 (200mV/div), Ch2=Iout2 (7.5A/div), Ch3=Vout1 (200mV/div), Ch4=Iout1 (7.5A/div) Scope measurement should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module.
Figure 16: Test set-up diagram showing measurement points for Input Terminal Ripple Current and Input Reflected Ripple Current. Note: Measured input reflected-ripple current with a simulated source Inductance (LTEST) of 12 H. Capacitor Cs offset possible battery impedance. Measure current as shown above
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DS_Q48DR1R533_03152007
ELECTRICAL CHARACTERISTICS CURVES
Figure 17: Input Terminal Ripple Current-ic, at full rated output current and nominal input voltage with 12H source impedance and 33F electrolytic capacitor (500 mA/div, 2us/div).
Figure 18: Input reflected ripple current-is, through a 12H source inductor at nominal input voltage and rated load current (20 mA/div, 2us/div).
Copper Strip
Vo(+)
10u Vo(-)
1u
SCOPE
RESISTIV LOAD
Figure 19: Output voltage noise and ripple measurement test setup
Figure 20: Output voltage ripple at nominal input voltage and rated load current (Iout1=Iout2=15A)(20 mV/div, 1us/div). Top trace: Vout2(20mV/div), Bottom trace(20mV/div) Load capacitance: 1F ceramic capacitor and 10F tantalum capacitor. Bandwidth: 20 MHz. Scope measurements should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module.
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DS_Q48DR1R533_03152007
ELECTRICAL CHARACTERISTICS CURVES
Figure 21: Output voltage vs. load current Iout1 showing typical current limit curves and converter shutdown points.
Figure 22: Output voltage vs. load current Iout2 showing typical current limit curves and converter shutdown points.
.
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DS_Q48DR1R533_03152007
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 H, we advise adding a 10 to 100 F electrolytic capacitor (ESR < 0.7 at 100 kHz) mounted close to the input of the module to improve the stability. Do not ground one of the input pins without grounding one of the output pins. This connection may allow a non-SELV voltage to appear between the output pin and ground. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. This power module is not internally fused. To achieve optimum safety and system protection, an input line fuse is highly recommended. The safety agencies require a normal-blow fuse with 7A maximum rating to be installed in the ungrounded lead. A lower rated fuse can be used based on the maximum inrush transient energy and maximum input current.
Layout and EMC Considerations
Delta's DC/DC power modules are designed to operate in a wide variety of systems and applications. For design assistance with EMC compliance and related PWB layout issues, please contact Delta's technical support team. An external input filter module is available for easier EMC compliance design. Application notes to assist designers in addressing these issues are pending release.
Soldering and Cleaning Considerations
Post solder cleaning is usually the final board assembly process before the board or system undergoes electrical testing. Inadequate cleaning and/or drying may lower the reliability of a power module and severely affect the finished circuit board assembly test. Adequate cleaning and/or drying is especially important for un-encapsulated and/or open frame type power modules. For assistance on appropriate soldering and cleaning procedures, please contact Delta's technical support team.
Safety Considerations
The power module must be installed in compliance with the spacing and separation requirements of the enduser's safety agency standard, i.e., UL60950, CAN/CSA-C22.2 No. 60950-00 and EN60950: 2000 and IEC60950-1999, if the system in which the power module is to be used must meet safety agency requirements. When the input source is 60 Vdc or below, the power module meets SELV (safety extra-low voltage) requirements. If the input source is a hazardous voltage which is greater than 60 Vdc and less than or equal to 75 Vdc, for the module's output to meet SELV requirements, all of the following must be met: The input source must be insulated from any hazardous voltages, including the ac mains, with reinforced insulation. One Vi pin and one Vo pin are grounded, or all the input and output pins are kept floating. The input terminals of the module are not operator accessible. If the metal baseplate is grounded the output must be also grounded. A SELV reliability test is conducted on the system where the module is used to ensure that under a single fault, hazardous voltage does not appear at the module's output.
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DS_Q48DR1R533_03152007
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.
Figure 23: Remote on/off implementation
Over-Voltage Protection
The modules include an internal output over-voltage protection circuit, which monitors the voltage on the output terminals. If this voltage exceeds the overvoltage set point, the module will shut down. The module will try to restart after shutdown. If the overvoltage condition still exists during restart, the module will shut down again. This restart trial will continue until the output voltage is within specification.
Output Voltage Adjustment (TRIM)
To increase or decrease the output voltage set point, the modules may be connected with an external resistor between the TRIM pin and either Vout1(+) or RTN. The TRIM pin should be left open if this feature is not used.
Over-Temperature Protection
The over-temperature protection consists of circuitry that provides protection from thermal damage. If the temperature exceeds the over-temperature threshold the module will shut down. The module will try to restart after shutdown. If the overtemperature condition still exists during restart, the module will shut down again. This restart trial will continue until the temperature is within specification.
Figure 24: Circuit configuration for trim-down (decrease output voltage)
Remote On/Off
The remote on/off feature on the module can be either negative or positive logic. Negative logic turns the module on during a logic low and off during a logic high. Positive logic turns the modules on during a logic high and off during a logic low. Remote on/off can be controlled by an external switch between the on/off terminal and the Vi(-) terminal. The switch can be an open collector or open drain. For negative logic if the remote on/off feature is not used, please short the on/off pin to Vi(-). For positive logic if the remote on/off feature is not used, please leave the on/off pin to floating.
If the external resistor is connected between the TRIM and Vout1(+) pin, the output voltage set point decreases (Fig. 24). The external resistor value is from the table below.
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DS_Q48DR1R533_03152007
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 (Vout Increase)
[%] Rtrim-up [K]
Trim Resistor (Vout Decrease)
[%]
Rtrim-down [K]
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 1.95 867 0
The output voltage can be increased by the trim pin, When using trim; the output voltage of the module is usually increased, which increases the power output of the module with the same output current. Care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power.
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DS_Q48DR1R533_03152007
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.
THERMAL CURVES
Thermal Testing Setup
Delta's DC/DC power modules are characterized in heated vertical wind tunnels that simulate the thermal environments encountered in most electronics equipment. This type of equipment commonly uses vertically mounted circuit cards in cabinet racks in which the power modules are mounted. The following figure shows the wind tunnel characterization setup. The power module is mounted on a test PWB and is vertically positioned within the wind tunnel. The space between the neighboring PWB and the top of the power module is constantly kept at 6.35mm (0.25'').
Figure 27: Hot spot temperature measured point The allowed maximum hot spot temperature is defined at 120
Output Load(%) 110% 100% 90% 80% 70% 60%
Q48DR1R533(standard) Output Load vs. Ambient Temperature and Air Velocity @Vin = 48V (Transverse Orientation)
Natural Convection
100LFM 200LFM 300LFM 400LFM 500LFM
Thermal Derating
Heat can be removed by increasing airflow over the module. The module's hottest spot is less than + 120C. To enhance system reliability, the power module should always be operated below the maximum operating temperature. If the temperature exceeds the maximum module temperature, reliability of the unit may be affected.
FACING PWB PWB MODULE
50% 40% 30% 20% 10% 0% 20 25 30 35
40
45
50
55
60
65
70
75 80 85 Ambient Temperature ()
Figure 28: Output load vs. ambient temperature and air velocity @Vin=48V(Transverse Orientation)
AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE
AIR FLOW
50.8 (2.0")
12.7 (0.5") Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 26: Wind tunnel test setup
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DS_Q48DR1R533_03152007
MECHANICAL DRAWING
Pin No.
1 2 3 4 5 6 7 8
Name
-Vin ON/OFF +Vin +Vout2 TRIM Output RTN +Vout1 Optional
Function
Negative input voltage Remote ON/OFF Positive input voltage Positive output voltage2 Output voltage trim Positive output voltage1 Trim 2
Notes:
1 2
Pins 1-8 are 1.00mm (0.040") diameter All pins are copper with Tin plating.
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DS_Q48DR1R533_03152007
PART NUMBERING SYSTEM
Q
Form Factor
Q - Quarter Brick
48
36V~75V
D
D- Dual Output
R
Product Series
R-Open frame
1R5
1R5-1.5V 1R8-1.8V 2R5-2.5V 3R3-3.3V
33
33-3.3V 50-5.0V
N
ON/OFF Logic
N-Negative (Default) P-Positive
R
Pin Length
R-0.170" (Default) N-0.145" K-0.110"
F
A
Option Code
Input Number of Voltage Outputs
Output Output Voltage 1 Voltage 2
F- RoHS 6/6 A - Standard Functions (Lead Free) (Default) B - with second trim pin
MODEL LIST
MODEL NAME
Q48DR1R533NRFA Q48DR1R833NRFA Q48DR2R533NRFA Q48DR3R350NRFA 36V~75V 36V~75V 36V~75V 36V~75V
INPUT
2.8A 2.9A 3.3A 3.8A
OUTPUT
1.5V/15A 1.8V/15A 2.5V/15A 3.3V/15A 3.3V/15A 3.3V/15A 3.3V/15A 5.0V/10A
EFF @ Full Load
87.5% 88.0% 88.0% 88.5%
CONTACT: www.delta.com.tw/dcdc
USA: Telephone: East Coast: (888) 335 8201 West Coast: (888) 335 8208 Fax: (978) 656 3964 Email: DCDC@delta-corp.com Europe: Phone: +41 31 998 53 11 Fax: +41 31 998 53 53 Email: DCDC@delta-es.com Asia & the rest of world: Telephone: +886 3 4526107 ext 6220 Fax: +886 3 4513485 Email: DCDC@delta.com.tw
WARRANTY
Delta offers a two (2) year limited warranty. Complete warranty information is listed on our web site or is available upon request from Delta. Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by Delta for its use, nor for any infringements of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Delta. Delta reserves the right to revise these specifications at any time, without notice.
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DS_Q48DR1R533_03152007

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