MCOTS-C-270-28-FT
Single Output
Full-brick
Product # MCOTS-C-270-28-FT Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005931 Rev. H 06/09/2016
Page 1
MCOTS-C-270-28-FT-N-M-F
DC-DC CONVERTER
270 (155-425V)
IN
28V
OUT
@ 21.4A
155-425V 155-475V 28V 21.4A 92% @ 10.7A /91% @ 21.4A
Continuous Input Transient Input Output Output Efciency
Operation: -55°C to +100°C
MILITARY COTS DC-DC CONVERTER
Designed and Manufactured in the USA
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.
Protection Features
• Input under-voltage lockout/over-voltage shutdown
• Output current limit and short circuit protection
• Input over-voltage protection
• Output over-voltage protection
• Thermal shutdown
Screening/Qualification
• AS9100 and ISO 9001 certied facility
• Qualied to MIL-STD-810
• Available with S-Grade or M-Grade screening
• Pre-cap inspection per IPC-A-610, Class III
• Temperature cycling per MIL-STD-883, Method 1010,
Condition B, 10 cycles
• Burn-In at 100 °C baseplate temperature
• Final visual inspection per MIL-STD-883, Method 2009
• Full component traceability
Operational Features
• High efciency, 91% at full rated load current
• Operating input voltage range: 155-425 V
• Fixed frequency switching provides predictable EMI
Safety Features
• 4250V dc, 100 MΩ input-to-output isolation
• (see Standards and Qualications page)
Mechanical Features
• Industry standard full-brick pin-out conguration
• Size: 4.686” x 2.486” x 0.512”
119.0 x 63.1 x 13.0 mm
• Total weight: 9.9oz (280g)
• Flanged baseplate version available
Control Features
• Fully Isolated On/Off control
• Remote sense for the output voltage
• Output voltage trim range of +10%, -20%
• Active current sharing (full feature option)
• Clock synchronization (full feature option)
• Start synchronization (full feature option)
Specification Compliance
MCOTS series converters (with an MCOTS lter) are
designed to meet:
•
MIL-HDBK-704 (A-F)
•
MIL-STD-461 (C, D, E, F)
Technical Specification
MCOTS-C-270-28-FT
Output:
28V
Current:
21.4A
Product # MCOTS-C-270-28-FT Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005931 Rev. H 06/09/2016
Page 2
BLOCK DIAGRAM
TYPICAL CONNECTION DIAGRAM
Vin
External
Input
Filter
Trim
Vin(+)
I
load
C
load
Vout(+)
R
trim-up
or
R
trim-down
Vsense(+)
ON/OFF
Vin(
_
) Vout(
_
)
Vsense(
_
)
Electrolytic
Capacitor
−
SENSE
REGULATION ST AGE
UVLO
OVSD
SECOND ARY
CONTROL
GATE CONTROL
PRIMARY
CONTROL
POSITIVE
INPUT
NEGATIVE
INPUT
ON/OFF+
10
11
5
6
3
POSITIVE
OUTPUT
NEGATIVE
OUTPUT
TRIM
+ SENSE
GATE DRIVERS
ISOLATION BARRIER
T1
T1
T2
T2
CURR ENT
LIMIT
CURR ENT
SENSE
OPTO-ISOLATION
DATA COUPLING
ISOLATION STAGE
4
1
2
ON/OFF-
SyncIn (Full Feature Option)
SyncOut (Full Feature Option)
16-18
13-15
12
7
VAUX
8
Start Sync
(Full Feature Option)
I Share
(Full Feature Option)
9