TECHNICAL SPECIFICATIONS

FEATURES

High efficiency: 93% @ 12V/19A

Size:
58.4x36.8x11.7mm
(2.30”x1.45”x0.46”) w/o heat-spreader
58.4x36.8x12.7mm
(2.30”x1.45”x0.50”) with heat-spreader

Industry standard footprint and pinout

Fixed frequency operation

Input UVLO

OTP and OVP

Output OCP hiccup mode

Output voltage trim down : -10%

Output voltage trim up: +10% at Vin>20V

Monotonic startup into normal and
pre-biased loads

1500V isolation and basic insulation

No minimum load required

No negative current during power or enable
on/off

Delphi Series Q36SR, Quarter Brick 228W
DC/DC Power Modules: 18V~75Vin,12V, 19Aout
The Delphi Series Q36SR, Quarter Brick, 18V~75Vin input, single
output, isolated DC/DC converters, are the latest offering from a world
leader in power systems technology and manufacturing ― Delta
ISO 9001, TL 9000, ISO 14001, QS 9000,
OHSAS18001 certified manufacturing facility

UL/cUL 60950-1 (US & Canada)
OPTIONS

Positive or negative remote On/Off
Electronics, Inc. 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. Typical efficiency of the
12V/19A module is greater than 93%.
APPLICATIONS
DS_Q36SR12019_08092012

Optical Transport

Data Networking

Communications

Servers
TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS
Q36SR12019
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
0
Transient (100ms)
100ms
Operating Temperature
-40
Storage Temperature
-55
Input/Output Isolation Voltage
INPUT CHARACTERISTICS
Operating Input Voltage
18
Input Under-Voltage Lockout
Turn-On Voltage Threshold
16
Turn-Off Voltage Threshold
15
Lockout Hysteresis Voltage
0.3
Maximum Input Current
100% Load, 18Vin
No-Load Input Current
Vin=48V,Io=0A
Off Converter Input Current
Vin=48V
2
Inrush Current (I t)
Input Reflected-Ripple Current
P-P thru 12µH inductor, 5Hz to 20MHz
Input Voltage Ripple Rejection
120 Hz
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Vin=48V, Io=Io.max, Tc=25°C
11.82
Output Voltage Regulation
Over Load
Io=Io, min to Io, max
Over Line
Vin=18V to 75V
Over Temperature
Tc=-40°C to 110°C
Total Output Voltage Range
Over sample load, line and temperature
11.64
Output Voltage Ripple and Noise
5Hz to 20MHz bandwidth
Peak-to-Peak
Full Load, 1µF ceramic, 10µF tantalum
RMS
Full Load, 1µF ceramic, 10µF tantalum
Operating Output Current Range
Vin=18V to75V
0
Operating Output Current Range
Output Over Current Protection(hiccup model)
Output Voltage 10% Low
110
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient
Vin=48V, 10µF Tan & 1µF Ceramic cap, 0.1A/µs
Positive Step Change in Output Current
75% Io.max to 50% Io.max
Negative Step Change in Output Current
50% Io.max to 75% Io.max
Settling Time (within 1% Vout nominal)
Turn-On Transient
Start-Up Time, From On/Off Control
Start-Up Time, From Input
Output Capacitance (note1)
Full load; 5% overshoot of Vout at startup
0
EFFICIENCY
100% Load
Vin=24V
100% Load
Vin=48V
60% Load
Vin=48V
ISOLATION CHARACTERISTICS
Input to Output
Isolation Resistance
10
Isolation Capacitance
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On)
Von/off
Logic High (Module Off)
Von/off
2.4
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off)
Von/off
Logic High (Module On)
Von/off
2.4
ON/OFF Current (for both remote on/off logic)
Ion/off at Von/off=0.0V
Leakage Current (for both remote on/off logic)
Logic High, Von/off=5V
Pout ≦ max rated power,Io ≦ Io.max
Output Voltage Trim Range(note 2)
-10
Pout ≦ max rated power,Io ≦ Io.max
Output Voltage Remote Sense Range
Output Over-Voltage Protection
Over full temp range; % of nominal Vout
115
GENERAL SPECIFICATIONS
MTBF
Io=80% of Io, max; Ta=25°C, normal input,600FLM
Weight
Without heat spreader
Weight
With heat spreader
Refer to Figure 19 for Hot spot location
Over-Temperature Shutdown ( Without heat spreader)
(48Vin,80%
200LFM,Airflow
from Vin+
to Vin-)
Over-Temperature Shutdown ( NTC resistor )
Refer toIo,
Figure
19 for NTC resistor
location
Note: Please attach thermocouple on NTC resistor to test OTP function, the hot spots’ temperature is just for reference.
Typ.
Max.
Units
80
100
85
125
1500
Vdc
Vdc
Vdc
°C
°C
Vdc
48
75
Vdc
17
16
1
18
17
1.8
17
Vdc
Vdc
Vdc
A
mA
mA
A2s
mA
dB
100
10
1
20
50
12.00
12.18
Vdc
±3
±3
±120
12.00
±15
±15
12.36
mV
mV
mV
V
19
mV
mV
A
140
%
100
550
550
200
mV
mV
µs
28
28
mS
mS
µF
5000
93.5
93.0
92.0
%
%
%
1500
1000
Vdc
MΩ
pF
260
KHz
1
45.5
61.1
135
130
0.8
5
V
V
0.8
5
1
V
V
mA
10
10
140
%
%
%
M hours
grams
grams
°C
°C
Note1: For applications with higher output capacitive load, please contact Delta
Note2: Trim down range -10% for 18Vin ~75Vin, Trim up range +10% for 20Vin ~ 75Vin.
2
Q36SR12019_08092012
ELECTRICAL CHARACTERISTICS CURVES
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.
Figure 3: Typical full load input characteristics at room
temperature
3
Q36SR12019_08092012
ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote On/Off Logic
0
0
0
0
Figure 4: Turn-on transient at full rated load current (resistive
load) (10 ms/div). Vin=48V. Top Trace: Vout, 3.0V/div; Bottom
Trace: ON/OFF input, 3V/div
Figure 5: Turn-on transient at zero load current (10 ms/div).
Vin=48V. Top Trace: Vout: 3.0V/div, Bottom Trace: ON/OFF
input, 3V/div
0
0
0
0
Figure 6: Output voltage response to step-change in load
current (50%-75%-50% of Io, max; di/dt = 0.1A/µs; Vin is 24v).
Load cap: 10µF tantalum capacitor and 1µF ceramic capacitor.
Top Trace: Vout (0.5V/div, 500us/div), Bottom Trace:Iout
(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 7: Output voltage response to step-change in load
current (50%-75%-50% of Io, max; di/dt = 0.1A/µs; Vin is 48v).
Load cap: 10µF tantalum capacitor and 1µF ceramic capacitor.
Top Trace: Vout (0.5V/div, 500us/div), Bottom Trace: Iout
(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
4
Q36SR12019_08092012
ELECTRICAL CHARACTERISTICS CURVES
0
Figure 8: 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 9: Input Terminal Ripple Current, ic, at full rated output
current and nominal input voltage (Vin=48V) with 12µH source
impedance and 33µF electrolytic capacitor (1A/div, 5us/div)
Copper
Strip
Vo(+)
10u
0
1u
SCOPE
RESISTIVE
LOAD
Vo(-)
Figure 10: Input reflected ripple current, is, through a 12µH
source inductor at nominal input voltage (Vin=48V) and rated
load current (20 mA/div, 5us/div)
Figure 11: Output voltage noise and ripple measurement test
setup
0
Figure 12: Output voltage ripple at nominal input voltage
(Vin=48V) and rated load current (50 mV/div, 2us/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
Figure 13: Output voltage vs. load current showing typical
current limit curves and converter shutdown points (Vin=48V)
5
Q36SR12019_08092012
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 100 μF 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 Q36SR12019 to meet class A in
CISSPR 22.
Schematic and Components List
CX1=4*2.2uF/100V ceramic cap
CX2=100uF/100V electrolytic cap
Delta standard EMI filter, FL75L20
Test result:
end-user’s safety agency standard, i.e., UL60950-1,
CSA C22.2 NO. 60950-1 2nd and IEC 60950-1 2nd :
2005 and EN 60950-1 2nd: 2006+A11+A1: 2010, if the
system in which the power module is to be used must
meet safety agency requirements.
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.

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.
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
Fast-acting fuse with 50A 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
25C, 48Vin, Green line is quasi peak mode and blue line
is average mode.
Safety Considerations
The power module must be installed in compliance with
the spacing and separation requirements of the
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.
6
Q36SR12019_08092012
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, and enter hiccup mode.
For hiccup mode, the module will try to restart after
shutdown. If the over current condition still exists, the
module will shut down again. This restart trial will continue
until the over-current condition is corrected.
Over-Voltage Protection
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 floating.
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, and enter in hiccup
Vi(+)
Vo(+)
Sense(+)
ON/OFF
trim
For hiccup mode, the module will try to restart after
shutdown. If the over voltage condition still exists, the
module will shut down again. This restart trial will continue
until the over-voltage condition is corrected.
Rload
Sense(-)
Vi(-)
Vo(-)
Over-Temperature Protection
Figure 14: Remote on/off implementation
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, and enter in hiccup.
For hiccup mode, the module will try to restart after
shutdown. This restart trial will continue until the
over-temperature condition is corrected.
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).
Vi(+)
Conduct resistance
Vo(+)
Sense(+)
ON/OFF
trim
Rload
Sense(-)
Vi(-)
Vo(-)
Figure 15: Effective circuit configuration for remote sense
operation
7
Q36SR12019_08092012
FEATURES DESCRIPTIONS (CON.)
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, which increases the
power output 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.
Output Voltage Adjustment (TRIM)
To increase or decrease the output voltage set point,
connect an external resistor between the TRIM pin and
the SENSE(+) or SENSE(-). The TRIM pin should be
left open if this feature is not used.
Figure 17: Circuit configuration for trim-up (increase output
voltage)
If the external resistor is connected between the TRIM
and SENSE (+) the output voltage set point increases
(Fig. 17). The external resistor value required to obtain
a percentage output voltage change △% is defined
as:
Rtrim  up 
5.11Vo (100   ) 511

 10.2K
1.225

Ex. When Trim-up +10% (12V×1.1=13.2V)
Rtrim  up 
5.11 12  (100  10) 511

 10.2  489.3K 
1.225  10
10
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.
Figure 16: 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. 16). The external resistor value
required to obtain a percentage of output voltage
change △% is defined as:
When using remote sense and 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.
 511

Rtrim  down  
 10.2 K 


Ex. When Trim-down -10% (12V×0.9=10.8V)
 511

Rtrim  down  
 10.2 K   40.9K 
 10

8
Q36SR12019_08092012
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.
THERMAL CURVES
(LONGITUDINAL ORIENTATION)
NTC RESISTOR
Hence, the choice of equipment to characterize the
thermal performance of the power module is a wind
tunnel.
AIRFLOW
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.
HOT SPOT
Figure 19: * Hot spot & NTC resistor temperature measured
points
Q36SR12019(Standard) Output Power vs. Ambient Temperature and Air Velocity
@Vin = 24V (Longitudinal Orientation)
Output Power(W)
240
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’’).
Natural
Convection
200
100LFM
160
200LFM
300LFM
120
400LFM
500LFM
PWB
FANCING PWB
80
MODULE
40
0
25
50.8(2.00")
AIR VELOCITY
AND AMBIENT
TEMPERATURE
SURED BELOW
THE MODULE
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 20: Output power vs. Ambient temperature @Vin=24V
(Longitudinal orientation，Airflow direction from Vin+ to Vout+,
without heat spreader)
AIR FLOW
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 18: Wind tunnel test setup
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
Q36SR12019_08092012
THERMAL CURVES
(LONGITUDINAL ORIENTATION)
THERMAL CURVES
(TRANSVERSE ORIENTATION)
Q36SR12019(Standard) Output Power vs. Ambient Temperature and Air Velocity
@Vin = 48V (Longitudinal Orientation)
Output Power(W)
240
NTC RESISTOR
AIRFLOW
200
Natural
Convection
160
100LFM
200LFM
300LFM
120
400LFM
500LFM
80
600LFM
40
0
25
30
35
40
45
50
55
60
65
70
HOT SPOT
75
80
85
Ambient Temperature (℃)
Figure 21: Output power vs. Ambient temperature @Vin=48V
(Longitudinal orientation，Airflow direction from Vin+ to Vout+,
without heat spreader)
Q36SR12019(Standard) Output Power vs. Ambient Temperature and Air Velocity
@Vin = 60V (Longitudinal Orientation)
Figure 23: * Hot spot & NTC resistor temperature measured
points
Output Power(W)
240
200
Q36SR12019(Standard) Output Power vs. Ambient Temperature and Air Velocity
@Vin = 24V (Transverse Orientation)
Output Power(W)
240
Natural
Convection
200
100LFM
Natural
Convection
160
160
200LFM
100LFM
300LFM
200LFM
120
120
300LFM
400LFM
400LFM
80
80
500LFM
600LFM
40
40
0
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 22: Output power vs. Ambient temperature @Vin=60V
(Longitudinal orientation，Airflow direction from Vin+ to Vout+,
without heat spreader)
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 24: Output power vs. Ambient temperature @Vin=24V
(Transverse orientation，Airflow direction from Vin+ to Vin-,
without heat spreader)
10
Q36SR12019_08092012
THERMAL CURVES
(TRANSVERSE ORIENTATION)
Q36SR12019(Standard) Output Power vs. Ambient Temperature and Air Velocity
@Vin = 48V (Transverse Orientation)
Output Power(W)
240
200
Natural
Convection
160
100LFM
200LFM
300LFM
120
400LFM
500LFM
80
40
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 25: Output power vs. Ambient temperature @Vin=48V
(Transverse orientation ，Airflow direction from Vin+ to Vin-,
without heat spreader)
Q36SR12019(Standard) Output Power vs. Ambient Temperature and Air Velocity
@Vin = 60V (Transverse Orientation)
Output Power(W)
240
200
Natural
Convection
160
100LFM
200LFM
300LFM
120
400LFM
500LFM
80
600LFM
40
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 26: Output power vs. Ambient temperature @Vin=60V
(Transverse orientation，Airflow direction from Vin+ to Vin-,
without heat spreader)
11
Q36SR12019_08092012
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.
12
Q36SR12019_08092012
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 over Nickel underplating.
13
Q36SR12019_08092012
PART NUMBERING SYSTEM
Q
Type of
Product
Q - 1/4
Brick
36
S
Input Number of
Voltage Outputs
36 18V~75V
S - Single
R
120
19
N
R
F
Product
Series
Output
Voltage
Output
Current
ON/OFF
Logic
Pin
Length/Type
R - Regular
120 - 12V
19 - 19A
N- Negative
P- Positive
R - 0.170”
N - 0.146”
K - 0.110”
A
Option Code
A - Standard
Space - RoHS 5/6
Functions
F - RoHS 6/6
H-with
heat spreader
(Lead Free)
MODEL LIST
MODEL NAME
Q36SR12019NRFA
INPUT
18V~75V
OUTPUT
17A
12V
EFF @ 100% LOAD
19A
93.0% @ 48Vin
Default remote on/off logic is negative and pin length is 0.170”
* 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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