DELTA Q48SP12017NRFA

FEATURES
High efficiency:92.5 @12V/18A
Size: 57.9x36.8x10.8mm (2.28”x1.45”x0.43”)
(w/o heatspreader)
57.9x36.8x12.7mm (2.28”x1.45”x0.50”)
(with heatspreader)
Industry standard pin out
Fixed frequency operation
Fully protected: OTP, OVP, OCP, UVLO
No minimum load required
Wide output trim range: -20~+10%
Remote sense
Fast transient response
Basic insulation and 2250V isolation
ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing facility
UL/cUL 60950 (US & Canada) recognized,
TUV (EN60950) certified
CE mark meets 73/23/EEC and 93/68/EEC
directives
Delphi Series Q48SP, 216W Quarter Brick Family
DC/DC Power Modules: 48V in, 12V/18A out
The Delphi Series Q48SP Quarter Brick, 48V input, 12V single output,
isolated, DC/DC converters are the latest offering from a world leader in
power systems technology and manufacturing ― Delta Electronics, Inc.
This product family provides up to 216 watts of power or up to 18A of
output current in an 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 Q48SP Delphi Series converters meet all
safety requirements with basic insulation.
OPTIONS
Latched over current protection
Positive remote on/off
Short lead lengths
APPLICATIONS
Telecom/DataCom
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial/Test Equipment
DATASHEET
DS_Q48SP12017_01162007
1
TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted; mounted on board.)
PARAMETER
NOTES and CONDITIONS
Q48SP12017NRFA
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Transient (100ms, non-operating)
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
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
Maximum Output Capacitance
EFFICIENCY
100% 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 Voltage Remote Sense Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown
Typ.
-0.5
100ms
Refer to Figure 22 for the measuring point
-40
-40
Output Voltage 10% Low
Vdc
Vdc
°C
°C
Vdc
75
Vdc
33
30
1
34
32
2
36
34
3
7
140
11
1
Vdc
Vdc
Vdc
A
mA
mA
A2S
mA
dB
12
12.2
Vdc
6
6
32
11.6
24
24
60
12.4
mV
mV
mV
V
0
19
150
50
18
24
mV
mV
A
A
10
50
11.8
48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
50% Io,max to 75% Io,max
75% Io,max to 50% Io,max
Full load; 5% overshoot of Vout at startup
80
100
120
105
2250
48
P-P thru 12µH inductor, 5Hz to 20MHz
120 Hz
Io=Io,min to Io,max
Vin=36V to 75V
Ta=-40C to135C
over sample load, line and temperature
5Hz to 20MHz bandwidth
Full Load, 1µF ceramic, 10µF tantalum
Full Load, 1µF ceramic, 10µF tantalum
21
300
300
400
mV
mV
uS
8
6
mS
mS
µF
0
`1500
92.5
%
2250
1000
Vdc
MΩ
pF
300
kHz
10
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
Across Pins 9 & 5, Pout <= max rated power
Pout <= max rated power
Over full temp range; % of nominal Vout
Io=80% of Io, max; Ta=25°C
Refer to Figure 22 for the measuring point
Units
36
100% Load, 36Vin
Vin=48V, Io=Io.max, Ta=25C
Max.
0
2
1
15
1
50
+10
0.5
16.5
-20
13.5
2.40
45
130
V
V
mA
uA
%
V
V
M hours
grams
°C
2
DS_Q48SP12017_01162007
ELECTRICAL CHARACTERISTICS CURVES
94
20
92
18
90
16
14
86
12
84
LOSS(W)
EFFICIENCY(%)
88
82
80
78
10
8
6
76
4
74
36V
72
48V
75V
36V
2
70
48V
75V
0
2
4
6
8
10
12
14
16
18
OUTPUT CURRENT(A)
2
4
6
8
10
12
14
16
18
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.
Figure 3: Turn-on transient at zero load current. Top Trace:
Vout; 5V/div; Bottom Trace: ON/OFF input: 2V/div
Figure 4: Turn-on transient at load full rated current. Top Trace:
Vout: 5V/div; Bottom Trace: ON/OFF input: 2V/div
3
DS_Q48SP12017_01162007
ELECTRICAL CHARACTERISTICS CURVES
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
Io=17A
Io=10.2A
Io=1.7A
Figure 6: Output voltage response to step-change in load current
(75%-50% of Io, max; di/dt = 0.1A/µs). Load cap: 10uf tantalum
capacitor and 1µF ceramic capacitor. Top Trace: Vout
(200mV/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..
OUTPUT VOLTAGE (V) )
INPUT CURREN (A)
Figure 5: Output voltage response to step-change in load
current (50%-75% of Io, max: di/dt =0.1A/µs). Load cap:1µF
ceramic capacitor and 10uF Tantalum capacitor. Top Trace:
Vout (200mV/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.
14
12
10
8
6
4
Vin=48V
2
30
35
40
45
50
55
60 65
70 75
INPUT VOLTAGE (V)
Vin=36V
Vin=75V
0
0
2
4
6
8
10
12
14
16
18
LOAD CURRENT (A)
Figure 7: Typical input characteristics at room temperature
Figure 8:Output characteristics at room temperature
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DS_Q48SP12017_01162007
ELECTRICAL CHARACTERISTICS CURVES
Figure 9: 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 10: Input reflected ripple current, ic through a 12µH
source inductor at nominal input voltage and rated load current
(20 mA/div).
5
DS_Q48SP12017_01162007
ELECTRICAL CHARACTERISTICS CURVES
Copper Strip
Vo(+)
10u
1u
SCOPE
RESISTIVE
LOAD
Vo(-)
Figure 11: Output voltage noise and ripple measurement
test setup
Figure 12: Output voltage ripple at 36V input voltage and rated
load current (50 mV/div). Load capacitance: 1µF ceramic
capacitor and 10µF tantalum capacitor. Bandwidth: 25 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 ripple at 48V input voltage and
rated load current (50 mV/div). Load capacitance: 1µF
ceramic capacitor and 10µF tantalum capacitor. Bandwidth:
25 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 14: Output voltage ripple at 75V input voltage and rated
load current (50 mV/div). Load capacitance: 1µF ceramic
capacitor and 10µF tantalum capacitor. Bandwidth: 25 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.
6
DS_Q48SP12017_01162007
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.
Application notes to assist designers in addressing
these issues are pending to release.
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.
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 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
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.
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.
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.
7
DS_Q48SP12017_01162007
FEATURES DESCRIPTIONS
Vi(+)
Over-Current Protection
Vo(+)
Sense(+)
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 latch off.
ON/OFF
Sense(-)
Vi(-)
Vo(-)
Over-Voltage Protection
Figure 15: Remote on/off implementation
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 and latch
off. Cycling the input power for one second can reset
the over-voltage latch.
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.
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(–)] ≤ 0.5V
This limit includes any increase in voltage due to
remote sense compensation and output voltage set
point adjustment (trim).
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.
Vi(+) Vo(+)
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 floating.
Sense(-)
Contact
Resistance
Vi(-)
Vo(-)
Contact and Distribution
Losses
Figure 16: 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
allowed increase is the larger of either the remote
sense spec or the trim spec, 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.
8
DS_Q48SP12017_01162007
FEATURES DESCRIPTIONS (CON.)
Output Voltage Adjustment (TRIM)
To increase or decrease the output voltage set point,
connect 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.
Figure 19: Circuit configuration for trim-down (decrease
output voltage)
If the external resistor is connected between the TRIM
and SENSE (-) the output voltage set point decreases
(Fig. 19). The external resistor value required to obtain
a percentage output voltage change △% is defined
as:
If the external resistor is connected between the TRIM
and SENSE (+) pins, the output voltage set point
increases (Fig. 17). The external resistor value
required to obtain a percentage of output voltage
change △% is defined as:
(5.11 × Vo(100 + ∆ ) 511
−
− 10.22)( KΩ)
1.225∆
∆
Vnom − Vadj
∆=(
) × 100
Vnom
Vo=Nominal voltage
Rtrim _ up = (
Ex. When trim up to 13.2V from 12V
Rtrim − up =
5.11 × 12(100 + 10 ) 511
−
− 10.22
1.225 × 10
10
Trim resistor value (K) )
⇒ = 489.3KΩ
Rtrim_down (∆ ) = (
511
− 10.22)kΩ
∆
Ex. When trim down to 9.6V from 12V
Rtrim − down =
Trim-resistor value (K) )
Figure 17: Circuit configuration for trim-up (increase output
voltage)
511
− 10.22 KΩ = 15.33KΩ
20
550
500
450
400
350
300
250
200
150
100
50
0
1
10
100
Trim-Down percentage
Figure 20: Trim DOWN resistor selection
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0
The output voltage can be increased by both the remote
sense and the trim, however the maximum allowed
increase is the larger of either the remote sense spec or
the trim spec, 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.
1
2
3
4
5
6
7
Trim-Up percentage
8
9
10
Care should be taken to ensure that the maximum
output power of the module remains at or below the
maximum rated power.
Figure 18: Trim UP resistor selection
9
DS_Q48SP12017_01162007
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 22: Temperature measurement location
The allowed maximum hot spot temperature is defined at 120℃
20
Output Current(A)
Q48SP12017(Standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Transverse Orientation)
600LFM
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’’).
18
500LFM
16
400LFM
14
12
10
Natural
Convection
8
100LFM
6
Thermal Derating
200LFM
4
Heat can be removed by increasing airflow over the
module. The module’s maximum hot spot temperature
is pending to release and the measured location is
illustrated in Figure 22. 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.
300LFM
2
0
20
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 23: Output current vs. ambient temperature and air
[email protected] 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 21: Wind tunnel test setup
10
DS_Q48SP12017_01162007
MECHANICAL DRAWING(WITHOUT HEATSPERADER)
Pin No.
1
2
3
4
5
6
7
8
9
Notes:
1
2
3
Name
Function
-Vin
CASE
ON/OFF
+Vin
+Vout
+SENSE
TRIM
-SENSE
-Vout
Negative input voltage
Case ground pin
Remote ON/OFF
Positive input voltage
Positive output voltage
Positive remote sense
Output voltage trim
Negative remote sense
Negative output voltage
Pins 1-4, 6-8 are 1.00mm (0.040”) diameter
Pins 5 and 9 are 1.50mm (0.060”) diameter
All pins are copper with Tin plating
11
DS_Q48SP12017_01162007
MECHANICAL DRAWING (WITH HEATSPREADER)
12
DS_Q48SP12017_01162007
PART NUMBERING SYSTEM
Q
Form
Factor
Q - Quarter
Brick
48
S
Input
Number of
Voltage
Outputs
48V
S - Single
P
120
17
N
R
Product
Series
Output
Voltage
Output
Current
ON/OFF
Logic
Pin
Length
18A
N - Negative
P - Positive
R - 0.170”
N - 0.145”
K - 0.110”
18A
120- 12V
F
A
Option Code
F- RoHS 6/6
(Lead Free)
A - Std. Functions
with case pin
B - Without case
pin
H - With
heatspreader and
case pin
MODEL LIST
MODEL NAME
Q48SP12017NRFA
INPUT
36V~75V
OUTPUT
7A
12V
EFF @ 100% LOAD
18A
92.5%
CONTACT: www.delta.com.tw/dcdc
USA:
Telephone:
East Coast: (888) 335 8201
West Coast: (888) 335 8208
Fax: (978) 656 3964
Email: [email protected]
Europe:
Telephone: +41 31 998 53 11
Fax: +41 31 998 53 53
Email: [email protected]
Asia & the rest of world:
Telephone: +886 3 4526107 x6220
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_Q48SP12017_01162007