MCOTS-C-28VE-28-QT
Single Output
Quarter-brick
9-70V
Continuous Input
M
ILITARY
COTS DC/DC C
ONVERTER
9-100V
Transient Input
28V
Output
2.8A
Output
Operation: -55°C to +100°C
87% @ 1.4A / 86% @ 2.8A
Efficiency
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
28 /D TS-
V C C-
IN CO 28
28 N VE
V VE -2
O R 8-
U TE Q
T @ R T
-N
2.
-M
8A
Operational Features
•
•
•
•
High efficiency, 86% at full rated load current
Operating input voltage range: 9-70 V
Fixed frequency switching provides predictable EMI
No minimum load requirement
Designed and Manufactured in the USA
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
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-28VE-28-QT
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006080 Rev. A
01/03/13
Page 1
MCOTS-C-28VE-28-QT
Output:
28V
Current:
2.8A
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(
_
)
V
in(
_
)
V
out(
_
)
R
trim-down
C
load
I
load
Product # MCOTS-C-28VE-28-QT
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006080 Rev. A
01/03/13
Page 2
MCOTS-C-28VE-28-QT
Output:
28V
Current:
2.8A
Technical Specification
MCOTS-C-28VE-28-QT ELECTRICAL CHARACTERISTICS
Tb = 25 °C, Vin = 28 Vdc 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
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage
Input to Output
Input to Base-Plate
Output to Base-Plate
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin
INPUT CHARACTERISTICS
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Recommended External Input Capacitance
Input Filter Component Values (L\C)
Maximum Input Current
No-Load Input Current
Disabled Input Current
Response to Input Transient
Input Terminal Ripple Current
Recommended Input Fuse
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
Peak-to-Peak
RMS
Operating Output Current Range
Output DC Current-Limit Inception
Output DC Current-Limit Shutdown Voltage
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs)
Settling Time
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
EFFICIENCY
100% Load
50% Load
Min.
-0.5
Typ.
Max.
100
70
100
2250
2250
2250
100
135
18
Units
V
V
V
V dc
V dc
V dc
°C
°C
V
V
V
V
V
µF
µH\µF
A
mA
mA
V
mA
A
V
%
%
mV
V
mV
mV
A
A
V
A
mA
µF
mV
µs
%
%
V
%
%
Notes & Conditions
Continuous
Continuous
1s transient, square wave
-55
-65
-2
9
9.0
8.1
28
9.5
8.5
1.0
330
0.47\6.6
112
3
0.9
700
Baseplate temperature
70
10.0
8.9
100V transient for 1s
see Note 1
Typical ESR 0.1-0.2 Ω
Internal values; see Figure E
Vin min; trim up; in current limit
13.5
140
5
20
27.72
28
±0.1
±0.1
-420
27.30
23
5
0
3.1
3.4
17
0.1
5
28.28
±0.3
±0.3
420
28.70
50
10
2.8
3.6
See Figure 12
RMS
Fast acting external fuse recommended
Over sample, line, load, temperature & life
20 MHz bandwidth; see Note 2
Full load
Full load
Subject to thermal derating
Output voltage 10% Low
Negative current drawn from output
Negative current drawn from output
Vout nominal at full load (resistive load)
50% to 75% to 50% Iout max
To within 1% Vout nom
Across Pins 8&4; Figure C; see Note 3
Across Pins 8&4
Over full temp range
See Figure 1 for efficiency curve
See Figure 1 for efficiency curve
250
400
600
-20
32.8
34.2
86
87
10
10
35.6
Note 1: Start-up is guaranteed above 10V, but will operate down to 9V.
Note 2: Output is terminated with 1 µF ceramic and 15 µF low-ESR tantalum capacitors. For applications requiring reduced output voltage ripple and
noise, consult SynQor applications support (e-mail: mqnbofae@synqor.com)
Note 3: Trim-down requires a 1% minimum load.
Product # MCOTS-C-28VE-28-QT
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006080 Rev. A
01/03/13
Page 3
MCOTS-C-28VE-28-QT
Output:
28V
Current:
2.8A
Technical Specification
MCOTS-C-28VE-28-QT ELECTRICAL CHARACTERISTICS
Tb = 25 °C, Vin = 28 Vdc 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.
See Figure F
Maximum Output Capacitance
See Absolute Maximum Ratings
DYNAMIC CHARACTERISTICS
Turn-On Transient
Turn-On Time
9
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
260
275
290
ON/OFF Control
Off-State Voltage
2.4
1.8
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
For both input and isolation stage
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-28VE-28-QT
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006080 Rev. A
01/03/13
Page 4
MCOTS-C-28VE-28-QT
Output:
28V
Current:
2.8A
Technical Specification
100
95
90
100
95
90
Efficiency (%)
85
80
75
70
65
60
0.0
0.4
0.8
1.2
1.6
Load Current (A)
2.0
2.4
2.8
9 Vin
28 Vin
70 Vin
Efficiency (%)
85
80
75
70
65
60
-55ºC
25ºC
Case Temperature (ºC)
9 Vin
28 Vin
70 Vin
100ºC
Figure 1:
Efficiency at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25
°
C.
20
18
16
Figure 2:
Efficiency at nominal output voltage and 60% rated power vs.
case temperature for minimum, nominal, and maximum input voltage.
16
14
Power Dissipation (W)
14
12
10
8
6
4
2
0
0.0
0.4
0.8
1.2
1.6
Load Current (A)
2.0
2.4
2.8
9 Vin
28 Vin
70 Vin
Power Dissipation (W)
12
10
8
6
4
2
0
-55ºC
25ºC
Case Temperature (ºC)
9 Vin
28 Vin
70 Vin
100ºC
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.
30
25
Output Voltage (V)
20
15
10
9 Vin
5
0
0
28 Vin
70 Vin
1
2
Load Current (A)
3
4
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-28VE-28-QT
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006080 Rev. A
01/03/13
Page 5
