DELTA Q48SQ12033PKFA

FEATURES

High efficiency : 95.5% @ 12V/33A

Size:
57.9*36.8*11.2mm(2.28”*1.45”*0.44”)
(without heat spreader)
57.9*36.8*12.7mm(2.28”*1.45”*0.50”)
(with heat spreader)

Standard footprint

Industry standard pin out

Fixed frequency operation

Input UVLO, Output OCP, OVP, OTP

Hiccup output over current protection
(OCP)

latched output over voltage protection
(OVP)

Auto recovery OTP and input UVLO

1500V isolation and basic insulation

No minimum load required

ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing
facility

UL/cUL 60950-1 (US & Canada)
recognized
Delphi Series Q48SQ, Quarter Brick Family
DC/DC Power Modules:
36~75V in, 12V/33A out, 400W
The Delphi series Q48SQ12033, quarter brick, 36~75V input, single output,
OPTIONS

Latched over current protection

Positive On/Off logic

Hiccup over voltage protection

Heat spreader optional
isolated DC/DC converter is the latest offering from a world leader in power
system and technology and manufacturing ― Delta Electronics, Inc. This
product provides up to 400 watts of power in an industry standard footprint
and pin out. With creative design technology and optimization of component
placement, these converters possess outstanding electrical and thermal
performances, as well as extremely high reliability under highly stressful
operating conditions. The Q48SQ12033 offers more than 95.5% high
efficiency at 33A full load. The Q48SQ12033 is fully protected from abnormal
input/output voltage, current, and temperature conditions and meets all
safety requirements with basic insulation.
DS_Q48SQ12033_09272013
APPLICATIONS

Telecom / Datacom

Wireless Networks

Optical Network Equipment

Server and Data Storage

Industrial / Testing Equipment
TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted;
PARAMETER
NOTES and CONDITIONS
Q48SQ12033 (Standard)
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Transient
Operating Ambient 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
2
Inrush Current (I t)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Load
Over Line
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
Settling Time (within 1% Vout nominal)
Turn-On Transient
Start-Up Time, From On/Off Control
Start-Up Time, From Input
Output voltage rise time
Maximum Output Capacitance
EFFICIENCY
100% Load
60% Load
ISOLATION CHARACTERISTICS
Input to Output
Isolation Resistance
Isolation Capacitance
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On)
Logic High (Module Off)
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off)
Logic High (Module On)
ON/OFF Current (for both remote on/off logic)
Leakage Current (for both remote on/off logic)
Output Over-Voltage Protection
Output voltage trim range
GENERAL SPECIFICATIONS
MTBF(with heat spreader)
Weight(without heat spreader)
Weight(with heat spreader)
100ms
-40
-55
Max.
Units
80
100
85
125
1500
Vdc
Vdc
°C
°C
Vdc
36
48
75
Vdc
33
31
34
32
2
35
33
Vdc
Vdc
Vdc
A
mA
mA
2
As
mA
dB
13
Vin=48V, Io=0A
Vin=48V, Io=0A
100
9
P-P thru 12µH inductor, 5Hz to 20MHz
120 Hz
20
-30
Vin=48V, Io=0, Tc=25°C
Vin=48V, Io=Io,min to Io,max
Vin=36V to 75V, Io=Io min
Vin=48V, Tc=-40°C to 85°C
over sample load, line and temperature
5Hz to 20MHz bandwidth
Full Load, 1µF ceramic, 10µF tantalum
Full Load, 1µF ceramic, 10µF tantalum
Output Voltage 10% Low
11.88
48V, 100uF Al Ecap,10µF Tan & 1µF Ceramic load
cap, 0.1A/µs
50% Io.max to 75% Io.max
75% Io.max to 50% Io.max
Start-up time by On/off, from On/off to 90%Vo.set
Start-up time by Vin, from Input to 90%Vo.set
Time for Vo to rise from 10% to 90% of Vo,set
Low ESR CAP (OSCON), 100% load;
Vin=48V
Vin=48V
12.12
Vdc
±10
±10
±60
±30
±30
12.36
mV
mV
mV
Vdc
160
50
33
46
mV
mV
A
A
250
250
300
500
500
mV
mV
us
100
100
60
140
140
75
5500
ms
ms
ms
µF
110
25
0
40
43
0
95.0
95.3
13
1
12.00
11.64
95.5
95.8
%
%
1500
6800
Vdc
MΩ
pF
130
kHz
10
Von/off at Ion/off=1.0mA
Von/off at Ion/off=0.0 µA
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
Over full temp range; % of nominal Vout
Pout≤Max rated power
0
2
0.8
50
V
V
0
2
0.8
50
1
50
140
10
V
V
mA
uA
%
%
115
-20
Io=80% of Io, max; Tc=25°C;Airflow=300LFM
Refer to Figure 21 for Hot spot location
(48Vin,80% Io, 200LFM,Airflow from Vin+ to Vin-)
Refer to Figure 23 for Hot spot location
Over-Temperature Shutdown (with heat spreader)
(48Vin,80% Io, 200LFM,Airflow from Vin+ to Vin-)
Over-Temperature Shutdown (NTC Resistor)
Refer to Figure 21 NTC resistor location
Note: Please attach thermocouple on NTC resistor to test OTP function, the hot spot’s temperature is just for reference.
Over-Temperature Shutdown (without heat spreader)
Typ.
125
2
50.0
65.5
M hours
grams
grams
135
°C
125
°C
125
°C
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DS_Q48SQ12033_09272013
ELECTRICAL CHARACTERISTICS CURVES
97
22
96
95
20
94
18
16
92
LOSS(W)
EFFICIENCY(%).
93
91
90
89
36V
88
87
14
12
10
48V
8
36V
75V
6
48V
86
75V
4
85
2
84
4
7
10
13
16
19
22
25
28
31
4
OUTPUT CURRENT(A)
7
10
13
16
19
22
25
28
31
OUTPUT CURRENT(A)
Figure 1: Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C.
Figure 2: Power dissipation vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
14.0
13.0
INPUT CURRENT(A)
12.0
11.0
10.0
9.0
8.0
7.0
6.0
5.0
4.0
30
35
40
45
50
55
60
65
70
75
INPUT VOLTAGE(V)
Figure 3: Typical full load input characteristics at room
temperature.
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DS_Q48SQ12033_09272013
ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote On/Off Logic
Figure 4: Turn-on transient at zero load current) (20ms/div).
Top Trace: Vout; 5V/div; Bottom Trace: ON/OFF input: 5V/div.
Figure 5: Turn-on transient at full rated load current (20
ms/div). Top Trace: Vout: 5V/div; Bottom Trace: ON/OFF input:
5V/div.
For Input Voltage Start up
Figure 6: Turn-on transient at zero load current (20 ms/div).
Top Trace: Vout; 5V/div; Bottom Trace: input voltage: 20V/div.
Figure 7: Turn-on transient at full rated load current (20
ms/div). Top Trace: Vout; 5V/div; Bottom Trace: input voltage:
20V/div.
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DS_Q48SQ12033_09272013
ELECTRICAL CHARACTERISTICS CURVES
Figure 8: Output voltage response to step-change in load
current (75%-50% of Io, max; di/dt = 0.1A/µs). Load cap: 100uF
Al-Electrolytic capacitor, 10µF tantalum capacitor and 1µF
ceramic capacitor. Top Trace: Vout; 100mV/div; Bottom Trace:
output current: 10A/div, Time: 200us/div
Figure 9: Output voltage response to step-change in load
current (50%-75% of Io, max; di/dt = 0.1A/µs). Load cap:
100uF Al-Electrolytic capacitor, 10µF tantalum capacitor and
1µF ceramic capacitor. Top Trace: Vout; 100mV/div; Bottom
Trace: output current: 10A/div, Time: 200us/div
Figure 10: 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.
Figure 11: Input Terminal Ripple Current, ic, at full rated output
current and nominal input voltage with 12µH source impedance
and 33µF electrolytic capacitor (200 mA/div,2us/div).
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DS_Q48SQ12033_09272013
ELECTRICAL CHARACTERISTICS CURVES
Copper
Strip
Vo(+)
10u
SCOPE
1u
RESISTIVE
LOAD
Vo(-)
Figure 12: Input reflected ripple current, is, through a 12µH
source inductor at nominal input voltage and rated load current
(20 mA/div,2us/div).
Figure 13: Output voltage noise and ripple measurement test
setup.
13.0
12.0
11.0
OUTPUT VOLTAGE(V)
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
4
8
12
16
20
24
28
32
36
40
44
OUTPUT CURRENT(A)
Figure 14: Output voltage ripple at nominal input voltage and
rated load current (Io=33A)(30 mV/div, 2us/div)
Load capacitance: 1µF ceramic capacitor and 10µF tantalum
capacitor. Bandwidth: 20 MHz.
Figure 15: Output voltage vs. load current at nominal input
voltage showing typical current limit curves and converter
shutdown points.
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DS_Q48SQ12033_09272013
CAN/CSA-C22.2, No. 60950-1 and EN60950-1+A11 and
IEC60950-1, if the system in which the power module is
to be used must meet safety agency requirements.
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 10μF to 100μF electrolytic
capacitor (ESR < 0.7 Ω at 100 kHz) mounted close to
the input of the module to improve the stability.
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. Below is the reference
design for an input filter tested with Q48SQ12033 series
to meet class B in CISSPR 22.
Schematic and Components List:
Cin is 100uF low ESR Aluminum cap:
CY is 1nF ceramic cap;
CX1 is 1uF*3 ceramic cap;
CX2 is 1uF*2 ceramic cap;
CY1,CY2 are 100nF*2 ceramic cap:
L1,L2 are common-mode inductor,L1=L2=0.47mH.
Test Result:Vin=48V,Io=33A,
Basic insulation based on 75 Vdc input is provided
between the input and output of the module for the
purpose of applying insulation requirements when the
input to this DC-to-DC converter is identified as TNV-2
or SELV. An additional evaluation is needed if the
source is other than TNV-2 or SELV.
When the input source is SELV circuit, 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 the ac
mains by reinforced or double insulation.

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, in combination with the
module, to ensure that under a single fault,
hazardous voltage does not appear at the module’s
output.
When installed into a Class II equipment (without
grounding), spacing consideration should be given to
the end-use installation, as the spacing between the
module and mounting surface have not been evaluated.
The power module has extra-low voltage (ELV) outputs
when all inputs are ELV.
dBμV
80.0
Limits
55022MQP
55022MAV
70.0
60.0
50.0
40.0
Transducer
LISNPUL
Traces
PK+
AV
30.0
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 20A 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.
Soldering and Cleaning Considerations
20.0
10.0
0.0
150 kHz
1 MHz
10 MHz
30 MHz
Blue Line is quasi peak mode; Green line is average mode.
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., UL60950-1,
Post solder cleaning is usually the final board assembly
process before the board or system undergoes electrical
testing. Inadequate cleaning and drying may lower the
reliability of a power module and severely affect the
finished circuit board assembly test. Adequate cleaning
and 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.
7
DS_Q48SQ12033_09272013
FEATURES DESCRIPTIONS
Vi(+)
Over-Current Protection
Sense(+)
ON/OFF
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 shut down (hiccup mode).The hiccup time will last
500ms.
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.
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
over-voltage threshold, the modules will shut down,
(latch mode). The module will not restart unless the
ON/OFF input is toggled or the input power is cycled.
Vo(+)
Sense(-)
Vi(-)
Vo(-)
Figure 16: Remote on/off implementation
Remote Sense
Remote sense compensates for voltage drops on the
output by sensing the actual output voltage at the point
of load. The voltage between the remote sense pins
and the output terminals must not exceed the output
voltage sense range given here:
[Vo(+) – Vo(–)] – [SENSE(+) – SENSE(–)] ≤ 10% × Vout
This limit includes any increase in voltage due to
remote sense compensation and output voltage set
point adjustment (trim).
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 restart after
the temperature is within specification.
Vi(+)
Sense(+)
Sense(-)
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.
Vo(+)
Vi(-)
Contact
Resistance
Vo(-)
Contact and Distribution
Losses
Figure 17: Effective circuit configuration for remote sense
operation
If the remote sense feature is not used to regulate the
output at the point of load, please connect SENSE(+) to
Vo(+) and SENSE(–) to Vo(–) at the module.
The output voltage can be increased by both the
remote sense and the trim; however, the maximum
increase is the larger of either the remote sense or the
trim, not the sum of both.
When using remote sense and trim, the output voltage
of the module is usually increased. And it will increase
the output power of the module with the same output
current.
Care should be taken to ensure that the maximum
output power does not exceed the maximum rated
power.
8
DS_Q48SQ12033_09272013
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 the
SENSE(+) or SENSE(-). The TRIM pin should be left
open if this feature is not used.
Trim down:
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 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 18: Circuit configuration for trim-down (decrease
output voltage)
If the external resistor is connected between the TRIM
and SENSE (-) pins, the output voltage set point
decreases (Fig. 18). The external resistor value
required to obtain a percentage of output voltage
change △% is defined as:
511
Rtrim  down 
 10.2K 

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’’).
PWB
FANCING PWB
MODULE
Trim up:
50.8(2.00")
AIR VELOCITY
AND AMBIENT
TEMPERATURE
SURED BELOW
THE MODULE
AIR FLOW
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 19: Circuit configuration for trim-up (increase output
voltage)
Figure 20: Wind tunnel test setup
If the external resistor is connected between the TRIM
and SENSE (+) the output voltage set point increases
(Fig. 19). The external resistor value required to obtain
a percentage output voltage change △% is defined
as:
5.11Vo (100   ) 511
Rtrim  up 

 10.2K
1.225

Thermal Derating
Heat can be removed by increasing airflow over the
module. 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.
9
DS_Q48SQ12033_09272013
THERMAL CURVES
(WITH HEAT SPREADER)
THERMAL CURVES
(WITHOUT HEAT SPREADER)
AIRFLOW
AIRFLOW
HOT SPOT1
NTC RESISTOR
Figure 21: * Hot spot1 and NTC resistor temperature measured
point. The allowed maximum hot spot1 temperature is defined
at 111℃.
HOT SPOT2
Figure 23: * Hot spot2 temperature measured point. The
allowed maximum hot spot2 temperature is defined at 105℃.
Q48SQ12033(Standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Transverse Orientation)
Q48SQ12033(Standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Transverse Orientation,With Heatspreader)
Output Current (A)
Output Current (A)
600LFM
600LFM
32
30
500LFM
28
25
24
Natural
Convection
20
100LFM
16
100LFM
15
Natural
Convection
20
200LFM
12
200LFM
10
300LFM
8
300LFM
400LFM
5
4
400LFM
500LFM
0
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 22: Output current vs. ambient temperature and air
velocity @Vin=48V(Transverse Orientation, airflow from Vin+ to
Vin-,without heat spreader)
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 24: Output current vs. ambient temperature and air
velocity @Vin=48V(Transverse Orientation, airflow from Vin+ to
Vin-,with heat spreader)
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DS_Q48SQ12033_09272013
MECHANICAL DRAWING (WITH HEAT SPREADER)
* For modules with through-hole pins and the optional heatspreader, they are intended for wave soldering assembly
onto system boards; please do not subject such modules through reflow temperature profile.
11
DS_Q48SQ12033_09272013
MECHANICAL DRAWING (WITHOUT HEAT SPREADER)
Pin No.
1
2
3
4
5
6
7
8
Name
+Vin
ON/OFF
-Vin
-Vout
-Sense
Trim
+Sense
+Vout
Function
Positive input voltage
Remote ON/OFF
Negative input voltage
Negative output voltage
Negative remote sense
Output voltage trim
Positive remote sense
Positive output voltage
Pin Specification:
Pins 1-3,5~7
Pins 4,8
1.00mm (0.040”) diameter
2. 1.50mm (0.060”) diameter
All pins are copper alloy with matte Tin plated(Pb free) and Nickel under plating.
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DS_Q48SQ12033_09272013
RECOMMENDED LAYOUT
PART NUMBERING SYSTEM
Q
48
Form
Input
Factor
Voltage
Q - Quarter
S
Q
Number of Product
Outputs
48-36V~75V S - Single
Brick
Series
120
33
N
R
Output
Output
ON/OFF
Pin
Voltage
Current
Logic
Length
33 - 33A
N - Negative
K - 0.110”
P - Positive
N - 0.146”
Q- QB high 120 - 12V
power
series
F
R - 0.170”
F - RoHS 6/6
(Lead Free)
H
A - with trim/ sense pin
no heat spreader
B - no trim/sense pin
Space - RoHS5/6
no heat spreader
H - with trim/sense pin
with heat spreader
N - no trim/sense pin
with heat spreader
* For modules with through-hole pins and the optional heatspreader, they are intended for wave soldering assembly
onto system boards; please do not subject such modules through reflow temperature profile.
CONTACT: www.deltaww.com/dcdc
USA:
Telephone:
East Coast: 978-656-3993
West Coast: 510-668-5100
Fax: (978) 656 3964
Email: [email protected]
Europe:
Phone: +31-20-655-0967
Fax: +31-20-655-0999
Email: [email protected]
Asia & the rest of world:
Telephone: +886 3 4526107
ext 6220~6224
Fax: +886 3 4513485
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_Q48SQ12033_09272013