MCOTS-C-28-28-HZ
Single Output
Half-brick
M
ILITARY
COTS DC/DC C
ONVERTER
16-40V
Continuous Input
16-50V
Transient Input
28V
Output
18A
Output
95%@9A/93%@18A
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.
Safety Features
• 2250V, 30 MΩ input-to-output isolation
• Certified 60950-1 requirement for basic insulation
(see Standards and Qualifications page)
Designed and Manufactured in the USA
Mil-COTS
HZ-N-M
-28-28-
COTS-C
M
TER
CONVER
DC/DC
18A
@
28 28V
OUT
IN
Control Features
•
•
•
•
On/Off control referenced to input return
Remote sense for the output voltage
Wide output voltage trim range of +20%, -50%
Optional: Active current share for parallel applications
Mechanical Features
•
Industry standard half-brick pin-out
•
Size:
2.49” x 2.39” x 0.51”
(63.1 x 60.6 x 13.0 mm)
• Total weight: 4.9 oz. (139 g)
•
Flanged baseplate version available
Protection Features
•
•
•
•
•
Input under-voltage lockout
Output current limit and short circuit protection
Active back bias limit
Auto-recovery output over-voltage protection
Thermal shutdown
Operational Features
• High efficiency, 93% at full rated load current
•
Operating input voltage range: 16-40V
•
Fixed frequency switching provides predictable EMI
•
No minimum load requirement
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.# 005-0005227 Rev. F
11/13/2013
Page 1
Specification Compliance
• MIL-HDBK-704 (A-F)
•
RTCA/DO-160E Section 16
• MIL-STD-1275 (B,D)
• DEF-STAN 61-5 (Part 6)/(5 or 6)
• MIL-STD-461 (C, D, E)
•
RTCA/DO-160E Section 22
Product # MCOTS-C-28-28-HZ
MCOTS series converters (with an MCOTS filter) are designed to meet:
•
•
•
•
Phone 1-888-567-9596
www.synqor.com
MCOTS-C-28-28-HZ
Output:
28V
Current:
18A
Technical Specification
BLOCK DIAGRAM
REGULATION STAGE
ISOLATION STAGE
CURRENT
SENSE
1
Vin(+)
9
Vout(+)
4
IN RTN
ISOLATION BARRIER
5
OUT RTN
GATE CONTROL
GATE DRIVERS
UVLO
CURRENT
LIMIT
PRIMARY
CONTROL
2
ON/OFF
OPTO-ISOLATION
SECONDARY
CONTROL
7
TRIM
3
Share (-) (Full
Feature Option)
8
SENSE(+)
B
Share (+) (Full
Feature Option)
DATA COUPLING
6
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-28-28-HZ
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005227 Rev. F
11/13/2013
Page 2
MCOTS-C-28-28-HZ
Output:
28V
Current:
18A
Technical Specification
MCOTS-C-28-28-HZ ELECTRICAL CHARACTERISTICS
Ta = 25 °C, Vin = 28dc 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-5
A/µs)
Settling Time
Output Voltage Trim Range
Output Over-Voltage Protection
EFFICIENCY
100% Load
50% Load
Min.
-1
Typ.
Max.
60
40
50
2250
2250
2250
100
135
18
Units
V
V
V
Vdc
Vdc
Vdc
°C
°C
V
V
V
V
V
µF
µH\µF
A
mA
mA
V
mA
A
V
Notes & Conditions
Continuous
Continuous
100 ms transient, square wave
Basic Insulation, Pollution Degree 2
-55
-65
-2
16
15.1
14.2
0.5
28
15.4
14.5
0.9
470
0.34\23
340
100
1.5
500
Baseplate temperature
40
15.7
14.8
1.5
50V transient for 100 ms
41
430
125
Typical ESR 0.1-0.2 Ω
Internal values; see Figure D
At low line, Full load and 20% trim up
40
27.54
28.00
±0.25\70
±0.25\70
±0.250
27.16
100
30
0
19.5
4
0
21
11.5
5
3
28.39
0.25 V/us input transient
RMS
Fast acting external fuse recommended
See Note 1
%\mV
%\mV
V
V
mV
mV
A
A
V
A
mA
mF
V
20
37.8
#N/A!
ms
%
V
#N/A!
%
%
±0.700
28.84
200
60
18
22.5
6
6
5
Over sample, line, load, temperature & life
20 MHz bandwidth; See Note 2
Full Load
Full Load
Subject to thermal derating
Output Voltage 10% Low
See Note 3
Negative current drawn from output
Negative current drawn from output
18 A Resistive Load
See Note 5
50% to 75% to 50% IOUT max, 200 µF load cap
To within 1% VOUT nom
Across Pins 8 & 6; Figure C
Over full temp range
#N/A!
See Figure 1 for efficiency curve
See Figure 1 for efficiency curve
1.5
8
-50
35
#N/A!
36.4
#N/A!
93
95
Product # MCOTS-C-28-28-HZ
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005227 Rev. F
11/13/2013
Page 3
MCOTS-C-28-28-HZ
Output:
28V
Current:
18A
Technical Specification
MCOTS-C-28-28-HZ ELECTRICAL CHARACTERISTICS
Ta = 25 °C, Vin = 28dc 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
DYNAMIC CHARACTERISTICS
Turn-On Transient
Turn-On Time
24
35
40
ms
Full load, Vout=90% nom.
Output Voltage Overshoot
5
%
No Load, 5mF load cap
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
2250
V
Isolation Resistance
30
MΩ
Isolation Capacitance (input to output)
1000
pF
See Note 4
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
125
°C
Package rated to 150 °C
Board Temperature
125
°C
UL rated max operating temp 130 °C
Transformer Temperature
125
°C
Maximum Baseplate Temperature, Tb
100
°C
FEATURE CHARACTERISTICS
Switching Frequency
230
240
250
kHz
Isolation stage switching freq. is half this
ON/OFF Control
Off-State Voltage
2.4
18.0
V
On-State Voltage
-2.0
0.8
V
ON/OFF Control
Pull-Up Voltage
15
18
V
Pull-Up Resistance
50
kΩ
Over-Temperature Shutdown OTP Trip Point
120
°C
Average PCB Temperature
Over-Temperature Shutdown Restart Hysteresis
10
°C
RELIABILITY CHARACTERISTICS
Calculated MTBF per MIL-HDBK-217F (GB)
4.1
10
6
Hrs.
Tb = 70 °C
Calculated MTBF per MIL-HDBK-217F (GM)
0.92
10
6
Hrs.
Tb = 70 °C
Field Demonstrated MTBF
TBD
10
6
Hrs.
Note 1: Line and load regulation is limited by duty cycle quantization and does not indicate a shift in the internal voltage reference.
Note 2: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com).
Note 3:
If the output voltage falls below the Output DC Current Limit Shutdown Voltage for more than 50ms, then the unit will enter into hiccup mode, with a
500ms off-time.
Note 4: Higher values of isolation capacitance can be added external to the module.
Note 5: Full-Featured models have been designed for significantly improved load transient response. Consult SynQor applications support.
STANDARDS COMPLIANCE
Parameter
Notes & Conditions
STANDARDS COMPLIANCE
UL 60950-1/R:2011-12
Basic Insulation
CAN/CSA-C22.2 No. 60950-1/A1:2011
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-28-28-HZ
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005227 Rev. F
11/13/2013
Page 4
MCOTS-C-28-28-HZ
Output:
28V
Current:
18A
Technical Specification
100
95
90
100
95
90
Efficiency (%)
Efficiency (%)
85
80
75
70
65
60
0
3
6
16Vin
28Vin
40Vin
85
80
75
70
65
60
-55ºC
16 Vin
28 Vin
40 Vin
Load Current (A)
9
12
15
18
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.
60
55
50
Figure 2: Efficiency
at nominal output voltage and 60% rated power vs.
case temperature for minimum, nominal, and maximum input voltage.
35
30
Power Dissipation (W)
Power Dissipation (W)
45
40
35
30
25
20
15
10
5
0
0
3
6
9
12
15
16Vin
28Vin
40Vin
25
20
15
10
5
0
-55ºC
16 Vin
28 Vin
40 Vin
Load Current (A)
18
25ºC
100ºC
Case Temperature (ºC)
Figure 3: Power Dissipation
at nominal output voltage vs. load current
for minimum, nominal, and maximum input voltage at TCASE=25°C.
Figure 4: Power Dissipation
at nominal output voltage and 60% rated power
vs. case temperature for minimum, nominal, and maximum input voltage.
20
18
16
35.0
30.0
25.0
20.0
15.0
10.0
5.0
0.0
0
5
Iout (A)
12
10
8
6
4
2
0
50
60
70
80
90
100
110
Output Voltage (V)
14
16 Vin
28 Vin
40 Vin
Base Plate Temperature (°C)
Load Current (A)
10
15
20
25
Figure 5: Thermal Derating
(maximum output current vs. base plate
temperature) at nominal input voltage.
Figure 6: Output I-V Characteristics
(output voltage vs. load current)
showing typical current limit curves. See Current Limit section in the
Application Notes.
Doc.# 005-0005227 Rev. F
11/13/2013
Page 5
Product # MCOTS-C-28-28-HZ
Phone 1-888-567-9596
www.synqor.com