MCOTS-C-48-05-QT
Single Output
Quarter-brick
M
ILITARY
COTS DC/DC C
ONVERTER
34-75V
Continuous Input
34-100V
Transient Input
5V
Output
25A
Output
92% @ 12.5A / 90% @ 25A
Efficiency
Full Power Operation: -55°C to +100°C
The MilQor series of Mil-COTS DC/DC converters brings
SynQor’s field proven high-efficiency synchronous
rectification technology to the Military/Aerospace
industry. SynQor’s ruggedized encased packaging
approach ensures survivability in demanding
environments. Compatible with the industry standard
format, these converters operate at a fixed frequency,
and follow conservative component derating guidelines.
They are designed and manufactured to comply with a
wide range of military standards.
Mil-COTS
M
D CO
C
48 /D TS-
IN C C-4
5. CO 8-
0V NV 05
O ER -Q
U
T @ TE T-N
R -
M
25
A
Designed and Manufactured in the USA
Operational Features
•
•
•
•
High efficiency, 90% at full rated load current
Operating input voltage range: 34-75V
Fixed frequency switching provides predictable EMI
No minimum load requirement
Safety Features
• 2250V, 30 MΩ input-to-output isolation
• Certified 60950-1 requirement for basic insulation
(see Standards and Qualifications page)
Protection Features
Mechanical Features
• Industry standard quarter-brick pin-out configuration
•
Size:
1.54” x 2.39” x 0.50”
(39.0 x 60.6 x 12.7 mm)
• Total weight: 3.02 oz. (85.7 g)
•
Flanged baseplate version available
•
•
•
•
•
Input under-voltage lockout
Output current limit and short circuit protection
Active back bias limit
Output over-voltage protection
Thermal shutdown
Screening/Qualification
•
•
•
•
AS9100 and ISO 9001:2008 certified facility
Qualification consistent with MIL-STD-883
Available with S-Grade or M-Grade screening
Temperature cycling per MIL-STD-883, Method 1010,
Condition B, 10 cycles
•
Burn-In at 100C baseplate temperature
• Final visual inspection per MIL-STD-2008
•
Full component traceability
Doc.# 005-0005326 Rev. G
12/11/12
Page 1
Control Features
•
On/Off control referenced to input return
•
Remote sense for the output voltage
• Output voltage trim range of +10%, -20%
Product # MCOTS-C-48-05-QT
Phone 1-888-567-9596 www.synqor.com
MCOTS-C-48-05-QT
Output:
5.0V
Current:
25A
Technical Specification
BLOCK DIAGRAM
REGULATION STAGE
1
POSITIVE
INPUT
CURRENT
SENSE
T1
T2
ISOLATION STAGE
8
T2
POSITIVE
OUTPUT
T1
3
INPUT
RETURN
4
OUTPUT
RETURN
GATE DRIVERS
ISOLATION BARRIER
GATE CONTROL
UVLO
OVSD
CURRENT
LIMIT
PRIMARY
CONTROL
2
ON/OFF
OPTO-ISOLATION
6
SECONDARY
CONTROL
TRIM
7
+ SENSE
5
DATA COUPLING
−
SENSE
TYPICAL CONNECTION DIAGRAM
V
in(+)
External
Input
Filter
Electrolytic
Capacitor
V
out(+)
V
sense(+)
R
trim-up
or
V
in
ON/OFF
Trim
V
sense( )
_
R
trim-down
C
load
I
load
V
in(
_
)
V
out(
_
)
Product # MCOTS-C-48-05-QT
Phone 1-888-567-9596 www.synqor.com
Doc.# 005-0005326 Rev. G
12/11/12
Page 2
MCOTS-C-48-05-QT
Output:
5.0V
Current:
25A
Technical Specification
MCOTS-C-48-05-QT ELECTRICAL CHARACTERISTICS
Tb = 25 °C, Vin = 48Vdc unless otherwise noted; full operating temperature range is -55 °C to +100 °C baseplate temperature with appropriate power
derating. Specifications subject to change without notice.
Parameter
Min.
Typ.
Max.
Units
Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
80
V
Continuous
Operating
75
V
Continuous
Operating Transient Protection
100
V
100 ms
Isolation Voltage
Input to Output
2250
V dc
Input to Base-Plate
2250
V dc
Output to Base-Plate
2250
V dc
Operating Temperature
-55
100
°C
Baseplate temperature
Storage Temperature
-65
135
°C
Voltage at ON/OFF input pin
-2
18
V
INPUT CHARACTERISTICS
Operating Input Voltage Range
34
48
75
V
Input Under-Voltage Lockout
Turn-On Voltage Threshold
32.2
33.0
33.8
V
Turn-Off Voltage Threshold
30.225
31
31.775
V
Lockout Voltage Hysteresis
2.0
V
µF
Recommended External Input Capacitance
100
Typical ESR 0.1-0.2Ω
Input Filter Component Values (L\C)
4.7\6.6
µH\µF
Internal values; see Figure E
Maximum Input Current
5.3
A
Vin min; trim up; in current limit
No-Load Input Current
70
90
mA
Disabled Input Current
2
4
mA
Response to Input Transient
0.25
V
500V/ms; see Figure 6
Input Terminal Ripple Current
320
mA
RMS
Recommended Input Fuse
15
A
Fast acting external fuse recommended
OUTPUT CHARACTERISTICS
Output Voltage Set Point
4.95
5
5.05
V
Output Voltage Regulation
Over Line
±0.1
±0.3
%
Over Load
±0.1
±0.3
%
Over Temperature
-75
75
mV
Total Output Voltage Range
4.875
5.125
V
Over sample, line, load, temperature & life
Output Voltage Ripple and Noise
20MHz bandwidth; see Note 1
Peak-to-Peak
0
60
120
mV
Full load
RMS
20
40
mV
Full load
Operating Output Current Range
0
25
A
Subject to thermal derating
Output DC Current-Limit Inception
27.5
30
32.5
A
Output voltage 10% Low
Output DC Current-Limit Shutdown Voltage
2.4
V
Back-Drive Current Limit while Enabled
1
A
Negative current drawn from output
Back-Drive Current Limit while Disabled
10
mA
Negative current drawn from output
Maximum Output Capacitance
8000
µF
Vout nominal at full load (resistive load)
Output Voltage during Load Current Transient
Step Change in Output Current (0.1A/µs)
240
mV
50% to 75% to 50% Iout max
Settling Time
400
µs
To within 1% Vout nom
Output Voltage Trim Range
-20
10
%
Across Pins 8&4; Figure C; See Note 2
Output Voltage Remote Sense Range
10
%
Across Pins 8&4
Output Over-Voltage Protection
5.9
6.1
6.4
V
Over full temp range
EFFICIENCY
100% Load
90
%
See Figure 1 for efficiency curve
50% Load
92
%
See Figure 1 for efficiency curve
Note 1: Output is terminated with 1 µF ceramic and 22 µF low-ESR tantalum capacitors. For applications requiring reduced output voltage ripple and
noise, consult SynQor applications support (e-mail: mqnbofae@synqor.com)
Note 2: Trim-up range is limited below 10% at low line and full load. Contact SynQor applications support for more detail (e-mail: mqnbofae@synqor.
com)
Product # MCOTS-C-48-05-QT
Phone 1-888-567-9596 www.synqor.com
Doc.# 005-0005326 Rev. G
12/11/12
Page 3
MCOTS-C-48-05-QT
Output:
5.0V
Current:
25A
Technical Specification
MCOTS-C-48-05-QT ELECTRICAL CHARACTERISTICS
Tb = 25 °C, Vin = 48Vdc unless otherwise noted; full operating temperature range is -55 °C to +100 °C baseplate temperature with appropriate power
derating. Specifications subject to change without notice.
Parameter
Min.
Typ.
Max.
Units
ms
ms
%
Notes & Conditions
Full load, Vout=90% nom.
Figure F
Maximum Output Capacitance
See Absolute Maximum Ratings
DYNAMIC CHARACTERISTICS
Turn-On Transient
Turn-On Time
10
Start-Up Inhibit Time
200
230
250
Output Voltage Overshoot
0
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
Isolation Resistance
30
Isolation Capacitance (input to output)
1000
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
125
Board Temperature
125
Transformer Temperature
125
Maximum Baseplate Temperature, Tb
100
FEATURE CHARACTERISTICS
Switching Frequency
250
ON/OFF Control
Off-State Voltage
2.4
18
On-State Voltage
-2
0.8
ON/OFF Control
Pull-Up Voltage
5
Pull-Up Resistance
50
Over-Temperature Shutdown OTP Trip Point
125
Over-Temperature Shutdown Restart Hysteresis
10
RELIABILITY CHARACTERISTICS
Calculated MTBF per MIL-HDBK-217F
3.4
Calculated MTBF per MIL-HDBK-217F
0.58
Note 1: Higher values of isolation capacitance can be added external to the module
MΩ
pF
°C
°C
°C
°C
kHz
V
See Note 1
Package rated to 150°C
UL rated max operating temp 130°C
Application notes Figures A & B
V
kΩ
°C
°C
10
6
Hrs.
10
6
Hrs.
Average PCB Temperature
Ground Benign, 70°C Tb
Ground Mobile, 70°C Tb
STANDARDS COMPLIANCE
Parameter
Notes & Conditions
STANDARDS COMPLIANCE
UL 60950-1:2007
Basic Insulation
CAN/CSA-C22.2 No. 60950-1:2007
EN60950-1/A12:2011
Note: An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety certificates on new releases or
download from the SynQor website.
Product # MCOTS-C-48-05-QT
Phone 1-888-567-9596 www.synqor.com
Doc.# 005-0005326 Rev. G
12/11/12
Page 4
MCOTS-C-48-05-QT
Output:
5.0V
Current:
25A
Technical Specification
100
95
90
100
95
90
Efficiency (%)
Efficiency (%)
85
80
75
70
65
60
0
5
34 Vin
48 Vin
75 Vin
85
80
75
70
65
60
-55ºC
34 Vin
48 Vin
75 Vin
Load Current (A)
10
15
20
25
25ºC
100ºC
Case Temperature (ºC)
Figure 1:
Efficiency at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25
°
C.
18
Figure 2:
Efficiency at nominal output voltage and 60% rated power vs.
case temperature for minimum, nominal, and maximum input voltage.
18
15
15
Power Dissipation (W)
Power Dissipation (W)
12
12
9
6
34 Vin
9
6
34 Vin
48 Vin
75 Vin
3
3
0
-55ºC
48 Vin
75 Vin
0
0
5
10
Load Current (A)
15
20
25
25ºC
100ºC
Case Temperature (ºC)
Figure 3:
Power dissipation at nominal output voltage vs. load current
for minimum, nominal, and maximum input voltage at T
CASE
=25
°
C.
Figure 4:
Power dissipation at nominal output voltage and 60% rated
power vs. case temperature for minimum, nominal, and maximum input
voltage.
120
Typical Current Limit Inception Point
30
25
20
100
Output Voltage (%)
80
Typical Output Voltage at Shutdown
Iout (A)
15
10
5
0
50
60
70
80
90
100
110
60
40
Vin min
Vin nom
Vin max
20
0
0
10
20
30
40
50
Base Plate Temperature (°C)
Load Current (%)
60
70
80
90
100 110 120 130 140 150
Figure 5:
Maximum output current vs. base plate temperature (nominal input
voltage).
Figure 6:
Output voltage vs. load current showing typical current limit
curves. See Current Limit section in the Application Notes.
Product # MCOTS-C-48-05-QT
Phone 1-888-567-9596 www.synqor.com
Doc.# 005-0005326 Rev. G
12/11/12
Page 5
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