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) 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
OPTIONS
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.
ꢀ
Optional second trim pin for
independent trim of the two outputs.
Positive On/Off logic
ꢀ
ꢀ
Short pin lengths available
APPLICATIONS
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ꢀ
ꢀ
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Telecom/DataCom
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial/Test Equipment
DATASHEET
DS_Q48DR1R533_03152007
1
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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
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. for Iout1=Iout2
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DS_Q48DR1R533_03152007
ELECTRICAL CHARACTERISTICS CURVES
Vout2
Vout1
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
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
Vout1
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
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
5
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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/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). Position the load between 51 mm to 76 mm (2
inches to 3 inches) from the module.
Ch1
Ch2
Ch1
Ch2
Ch3
Ch4
Ch3
Ch4
Figure 11: Output voltage response to step-change in load
current Iout1 (75%-50%-75% of Io, max; di/dt = 0.1A/µs) at
Iout2=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). 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/µs). 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). Position the load between 51 mm to 76 mm (2
inches to 3 inches) from the module.
6
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DS_Q48DR1R533_03152007
ELECTRICAL CHARACTERISTICS CURVES
Ch1
Ch1
Ch2
Ch2
Ch3
Ch4
Ch3
Ch4
Figure 13: Output voltage response to step-change in load
current Iout2 (75%-50%-75% of Io, max; di/dt = 2.5A/µs) at
Iout1=7.5A. Load cap: 470µF, 35mΩ ESR solid electrolytic
capacitor and 1µF 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/µs) at
Iout2=7.5A. Load cap: 470µF, 35mΩ ESR solid electrolytic
capacitor and 1µF 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/µs). Load cap: 470µF, 35mΩ ESR solid electrolytic
capacitor and 1µF 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 µH. 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
Figure 18: Input reflected ripple current-is, through a 12µH
source inductor at nominal input voltage and rated load current
(20 mA/div, 2us/div).
output current and nominal input voltage with 12µH source
impedance and 33µF electrolytic capacitor (500 mA/div,
2us/div).
CopperStrip
Vo(+)
SCOPE RESISTIV
10u
1u
LOAD
Vo(-)
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: 1µF ceramic capacitor and 10µF 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
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.
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.
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 end-
user’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.
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One Vi pin and one Vo pin are grounded, or all the
input and output pins are kept floating.
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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.
10
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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
Output Voltage Adjustment (TRIM)
The modules include an internal output over-voltage
protection circuit, which monitors the voltage on the
output terminals. If this voltage exceeds the over-
voltage set point, the module will shut down.
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.
The module will try to restart after shutdown. If the over-
voltage condition still exists during restart, the module
will shut down again. This restart trial will continue until
the output voltage is within specification.
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 over-
temperature 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
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.
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.
11
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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)
Δ [%] Rtrim-up [KΩ]
Trim Resistor
(Vout Decrease)
Rtrim-down [KΩ]
Δ [%]
1
2
57.4
25.5
14.9
9.57
6.38
4.26
2.47
1.60
709
0
1
2
70.2
31.2
18.2
11.7
7.80
5.20
3.34
1.95
867
0
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
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.
12
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DS_Q48DR1R533_03152007
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 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.
Figure 27: Hot spot temperature measured point
＊The allowed maximum hot spot temperature is defined at 120℃
Q48DR1R533(standard) Output Load vs. Ambient Temperature and Air Velocity
Output Load(%)
@Vin = 48V (Transverse Orientation)
110%
100%
90%
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’’).
80%
Natural
Convection
70%
60%
50%
40%
30%
20%
10%
0%
100LFM
200LFM
Thermal Derating
300LFM
400LFM
Heat can be removed by increasing airflow over the
module. The module’s hottest spot is less than + 120°C.
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.
500LFM
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)
PWB
FACING PWB
MODULE
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
50.8 (2.0”)
AIR FLOW
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. Name
Function
1
2
3
4
5
6
7
8
-Vin
Negative input voltage
Remote ON/OFF
ON/OFF
+Vin
+Vout2
TRIM
Output RTN
+Vout1
Optional
Positive input voltage
Positive output voltage2
Output voltage trim
Positive output voltage1
Trim 2
Notes:
Pins 1-8 are 1.00mm (0.040”) diameter
All pins are copper with Tin plating.
1
2
14
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DS_Q48DR1R533_03152007
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
Brick
D- Dual
Output
R-Open frame 1R5-1.5V
1R8-1.8V
33-3.3V
50-5.0V
N-Negative
(Default)
P-Positive
R-0.170”
(Default)
N-0.145”
K-0.110”
A - Standard
Functions
(Default)
B - with second
trim pin
F- RoHS 6/6
(Lead Free)
2R5-2.5V
3R3-3.3V
MODEL LIST
MODEL NAME
Q48DR1R533NRFA
Q48DR1R833NRFA
Q48DR2R533NRFA
Q48DR3R350NRFA
INPUT
OUTPUT
EFF @ Full Load
36V~75V
36V~75V
2.8A
2.9A
3.3A
3.8A
1.5V/15A
3.3V/15A
3.3V/15A
3.3V/15A
5.0V/10A
87.5%
88.0%
88.0%
88.5%
1.8V/15A
2.5V/15A
3.3V/15A
36V~75V
36V~75V
CONTACT: www.delta.com.tw/dcdc
USA:
Asia & the rest of world:
Telephone: +886 3 4526107 ext 6220
Fax: +886 3 4513485
Europe:
Phone: +41 31 998 53 11
Fax: +41 31 998 53 53
Telephone:
East Coast: (888) 335 8201
West Coast: (888) 335 8208
Fax: (978) 656 3964
Email: [email protected]
Email: [email protected]
Email: [email protected]
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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