FEATURES
High efficiency: 85.3% @ 1.2V/13A, 3.3V/8A
Low profile: 0.33”
Industry standard footprint and pinout
Flexible current allocation on each output
Low voltage output (O/P 1) starts up first
Fixed frequency operation
Input UVLO, Output OCP, OVP, OTP
No minimum load required
Basic insulation
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.
Delphi Series Q48DW, 45W Quarter Brick,
Dual Output DC/DC Power Modules:
1.2V/13A and 3.3V/8A
The Delphi Series Q48DW Quarter Brick, 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 dual positive regulated
outputs with a flexible combination of output current and power up to
45W in a very cost effective industry standard footprint. With creative
design technology and optimization of component placement, these
converters possess outstanding electrical and thermal performance,
as well as extremely high reliability under highly stressful operating
conditions. All models are fully protected from abnormal input/output
voltage, current, and temperature conditions. The Delphi Series
Q48DW converters meet all safety requirements with basic insulation.
OPTIONS
Positive On/Off logic
Short pin lengths
Heatsink available for extended
operation
APPLICATIONS
Telecom/DataCom
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial/Test Equipment
DATASHEET
DS_ Q48DW3R312_07202006
TECHNICAL SPECIFICATIONS
(T =25°C, airflow rate=200 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(I
2
t)
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
Delay Time, From On/Off Control
Delay Time, From Input
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
Input to Case
Output to Case
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 Boltage Remoote Sense Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown
NOTES and CONDITIONS
Q48DW3R312NRFA
Min.
Typ.
Max.
80
100
118
125
48
34
32
2
40
5
0.015
5
66
75
35
33
3
1.8
60
10
10
1.260
3.360
±15
±10
±15
±50
±85
50
50
30
30
13
8
Units
Vdc
Vdc
°C
°C
Vdc
Vdc
Vdc
Vdc
Vdc
A
mA
mA
A
2
s
mA
dB
Vdc
<100ms
Refer to Figure 27 for measuring point
<1 minute
-40
-55
1500
36
33
31
1
P-P thru 12µH 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 110℃
Over sample load, line and temperature
5Hz to 20MHz bandwidth
Io1, Io2 Full Load, 1µF ceramic, 10µF tantalum
Io1, Io2 Full Load, 1µF ceramic, 10µF tantalum
Vout 1
Vout 2
Vout 1
Vout 2
Vout 1
Vout 2
Vout 1
Vout 2
Vout 1
Vout 2
Vout 1
Vout 2
Vout 1
Vout 2
1.200
3.300
1.240
3.330
±5
±3
±5
±15
±30
30
30
15
15
mV
mV
mV
mV
mV
mV
mV
A
A
0
0
14.5
9.5
100
100
100
100
100
100
5
5
10
10
48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
Vout 1
Iout1and Iout2 from 50% Io, max to 75% Io, max
Vout 2
Vout 1
Iout2 and Iout1 from 75% Io, max to 50% Io, max
Vout 2
mV
mV
mV
us
ms
ms
ms
ms
10000
5000
µF
%
%
Vdc
MΩ
pF
kHz
0.8
18
1
1
+10
V
V
mA
mA
%
%
M hours
grams
°C
Full load; 5% overshoot of Vout at startup
Iout1, Iout2 full load, 48vdc Vin
Iout1, Iout2 60% of full load, 48vdc Vin
<1 minute
Vout 1
Vout 2
85.3
86.5
1500
10
2000
300
Von/off at Ion/off=1.0mA
Von/off at Ion/off=0.0 µA
Ion/off at Von/off=0.0V
Logic High, Von/off=15V
Just trim Vout1, Pout
≦
max rated power
No Remote Sense Function
Over full temp range; %of nominal Vout
Io=80% of Io, max; Ta=25°C
Refer to Figure 27 for measuring point
0
-10
120
135
2.69
25
120
150
DS_Q48DW3R312_07202006
2
ELECTRICAL CHARACTERISTICS CURVES
90
87
88
85
84
EFFICIENCY (%)
EFFICIENCY (%)
81
48Vin
36Vin
82
48Vin
36Vin
78
75
72
69
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
OUTPUT CURRENT(A)
79
75Vin
75Vin
76
73
1.5
3.0
4.5
6.0
7.5
9.0
10.5
12.0
OUTPUT CURRENT(A)
Figure 1:
Efficiency vs. load current Iout2 for minimum,
nominal, and maximum input voltage at 25
°
C, for Iout1=6A.
88
84
80
EFFICIENCY (%)
Figure 2:
Efficiency vs. load current Iout1 for minimum,
nominal, and maximum input voltage at 25
°
C, for Iout2=4A
8.00
7.50
7.00
POWER DISSIPATION (W
36Vin
48Vin
75V
in
6.50
6.00
5.50
5.00
4.50
4.00
3.50
3.00
2.50
2.00
76
48Vin
36Vin
72
68
64
60
56
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
OUTPUT CURRENT(A)
75Vin
10%
20%
30%
40%
50%
60%
70%
80%
90% 100%
OUTPUT CURRENT(A)
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
DS_Q48DW3R312_07202006
3
ELECTRICAL CHARACTERISTICS CURVES
Figure 5:
Turn-on transient at zero load current (5ms/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) (5 ms/div). Vin=48V. Negative logic turn on. Top Trace:
Vout; 1V/div; Bottom Trace: ON/OFF input: 5V/div
Figure 7:
Turn-on transient at zero load current (5ms/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 (5ms/div).
Vin=48V. Positive logic turns on. Top Trace: Vout; 1V/div;
Bottom Trace: ON/OFF input: 5V/div
DS_Q48DW3R312_07202006
4
ELECTRICAL CHARACTERISTICS CURVES
1.8
1.5
1.2
INPUT CURRENT(A)
0.9
0.6
0.3
0
30
35
40
45
50
55
60
65
70
75
INPUT VOLTAGE(V)
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=0A. Load cap: 10µF, tantalum capacitor and 1µF ceramic
capacitor. Ch1=Vout2 (50mV/div), Ch2=Iout2 (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 11:
Output voltage response to step-change in load
current Iout1 (75%-50%-75% of Io, max; di/dt = 0.1A/µs) at
Iout2=0. Load cap: 10µF, tantalum capacitor and 1µF
ceramic capacitor. Ch1=Vout1 (50mV/div), Ch2=Iout1
(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=Vout1 (50mV/div), Ch2=Iout1 (10A/div),
Ch3=Vout2
(100mV/div),
Ch4=Iout2
(10A/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.
DS_Q48DW3R312_07202006
5
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