MCOTS-C-28-1R2-SM-F-S [SYNQOR]
DC-DC Regulated Power Supply Module, 1 Output, 30W, Hybrid, SIXTEENTH BRICK PACKAGE-8;
| 型号： | MCOTS-C-28-1R2-SM-F-S |
| 厂家： | 
SYNQOR WORLDWIDE HEADQUARTERS |
| 描述： | DC-DC Regulated Power Supply Module, 1 Output, 30W, Hybrid, SIXTEENTH BRICK PACKAGE-8 |
| 文件： | 总15页 (文件大小：6958K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MCOTS-C-28-1R2-SM
Single Output
Sixteenth-brick
MILITARY COTS DC-DC CONVERTER
16-40V
16-50V
1.2V
25A
79% @ 12.5A / 79% @ 25A
Continuous Input Transient Input
Output
Output
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
VERTER
@ 25A
2VOUT
MCOTS-C-28-1R2-SM-N
1.
DC-DC CON
28VIN
Safety Features
Designed and Manufactured in the USA
• 2250V, 30 MΩ input-to-output isolation
• Certified 60950-1 requirement for basic insulation
(see Standards and Qualifications page)
Operational Features
High efficiency, 79% at full rated load current
• Operating input voltage range: 16-40V
• Fixed frequency switching provides predictable EMI
• No minimum load requirement
Mechanical Features
Industry standard sixteenth-brick pin-out
•
configuration
• Size:
1.04" x 1.44" x 0.50"
Protection Features
(26.3 x 36.5 x 12.7 mm)
• Total weight: 1.14oz (32.3g)
• Flanged baseplate version available
• Input under-voltage lockout
• Output current limit and short circuit protection
• Active back bias limit
• Output over-voltage protection
hermal shutdown
Control Features
• On/Off control referenced to input return
• Remote sense for the output voltage
• Output voltage trim range of +10%, -10%
Screening/Qualification
S9100 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
Specification Compliance
MCOTS series converters (with an MCOTS filter) are designed to meet:
•
•
•
•
•
•
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
ProcS-81-S18--9
wsrcm
Doc.# 005-0005339 Rev. E
12/06/2013
Page 1
MCOTS-C-28-1R2-SM
Output: 1.2V
Current: 25A
Technical Specification
BLOCK DIAGRAM
GATE
CONTROL
POSITIVE
INPUT
GATE
DRIVER
POSITIVE
OUTPUT
OUTPUT
RETUN
GATE
DRIVER
INPUT
RETURN
CURRENT
SENSE
GATE
CONTROL
CURRENT
LIMT
+ SENSE
TRIM
PRIMARY
CONTROL
SECONDARY
CONTROL
UVLO
ON/OFF
- SENSE
TYPICAL CONNECTION DIAGRAM
Vout(+)
Vin(+)
Electrolytic
Capacitor
Vsense(+)
External
Input
Filter
Rtrim-up
or
Vin
Trim
ON/OFF
Vin(_)
Cload
Rtrim-down
Iload
Vsense(_)
Vout(_)
P
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Page2
MCOTS-C-28-1R2-SM
Output: 1.2V
Current: 25A
Technical Specification
MCOTS-C-28-1R2-SM 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 Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage
-1
50
40
50
V
V
V
Continuous
Continuous
100 ms
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
2250
2250
2250
100
135
8
V dc
V dc
V dc
°C
°C
V
-55
-65
-2
Baseplate temperature
16
28
40
V
14.8
13.7
15.4
14.5
0.9
100
0.47\5
16.0
15.3
V
V
V
µF
µH\µF
A
mA
mA
V
Typical ESR 0.1-0.2 Ω
Internal values; see Figure E
Vin min; trim up; in current limit
3.5
100
14
80
10
0.03
100
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
500 V/ms; see Figure 6
RMS
Fast acting external fuse recommended
mA
A
20
1.188
1.2
1.212
V
±0.1
±0.1
±0.3
±0.3
18
%
%
mV
V
-18
1.17
1.23
Over sample, line, load, temperature & life
20 MHz bandwidth; See Note 1
Full load
Full load
Subject to thermal derating
0
35
10
70
20
25
mV
mV
A
A
A
RMS
Operating Output Current Range
Output DC Current-Limit Inception
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
0
27.5
30
1
2
32.5
Negative current drawn from output
Negative current drawn from output
Vout nominal at full load (resistive); See Note 2
mA
µF
10000
75
100
mV
µs
%
%
V
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
-10
1.4
10
10
1.8
1.6
Over full temp range
100% Load
50% Load
79
79
%
%
See Figure 1 for efficiency curve
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: Recommended minimum output capacitance is 100 µF
Note 3: 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-28-1R2-SM Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005339 Rev. E
12/06/2013
Page 3
MCOTS-C-28-1R2-SM
Output: 1.2V
Current: 25A
Technical Specification
MCOTS-C-28-1R2-SM 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 Notes & Conditions
DYNAMIC CHARACTERISTICS
Turn-On Transient
Turn-On Time
Start-Up Inhibit Time
Power-up Inhibit Time
Output Voltage Overshoot
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
Isolation Resistance
35
200
2
ms
ms
ms
%
Full load, Vout=90% nom.
Figure F; See Note 1
Figure F
180
250
0
Maximum Output Capacitance
See Absolute Maximum Ratings
See Note 2
30
1000
MΩ
pF
Isolation Capacitance (input to output)
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Board Temperature
125
125
125
100
°C
°C
°C
°C
Package rated to 150 °C
UL rated max operating temp 130 °C
Transformer Temperature
Maximum Baseplate Temperature, Tb
FEATURE CHARACTERISTICS
Switching Frequency
350
kHz
V
Isolation stage switching freq. is half this
ON/OFF Control
Off-State Voltage
On-State Voltage
2.4
-2
8
0.8
ON/OFF Control
Pull-Up Voltage
Pull-Up Resistance
Over-Temperature Shutdown OTP Trip Point
Over-Temperature Shutdown Restart Hysteresis
RELIABILITY CHARACTERISTICS
Calculated MTBF per MIL-HDBK-217F
Calculated MTBF per MIL-HDBK-217F
Application notes Figures A & B
Average PCB Temperature
5
10
125
10
V
kΩ
°C
°C
6
11.7
2.7
10 Hrs. Ground Benign, 70°C Tb
10 Hrs. Ground Mobile, 70°C Tb
6
Note 1: Maximum value is 400ms for DC current limit and short circuit fault conditions
Note 2: Higher values of isolation capacitance can be added external to the module
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-28-1R2-SM Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005339 Rev. E
12/06/2013
Page 4
MCOTS-C-28-1R2-SM
Output: 1.2V
Current: 25A
Technical Specification
100
95
90
85
80
75
70
65
60
100
95
90
85
80
75
70
65
60
16 Vin
28 Vin
40 Vin
16 Vin
28 Vin
40 Vin
-55ºC
25ºC
100ºC
0
5
10
15
20
25
Case Temperature (ºC)
Load Current (A)
Figure 1: Efficiency at nominal output voltage vs. load current for
Figure 2: Efficiency at nominal output voltage and 60% rated power vs.
minimum, nominal, and maximum input voltage at 25
°C.
case temperature for minimum, nominal, and maximum input voltage.
14
12
10
8
14
12
10
8
6
6
4
4
16 Vin
16 Vin
28 Vin
40 Vin
28 Vin
2
2
40 Vin
0
0
-55ºC
25ºC
100ºC
0
5
10
15
20
25
Case Temperature (ºC)
Load Current (A)
Figure 3: Power dissipation at nominal output voltage vs. load current for
Figure 4: Power dissipation at nominal output voltage and 60% rated
minimum, nominal, and maximum input voltage at T =25
°C.
power vs. case temperature for minimum, nominal, and maximum input
voltage.
CASE
30
25
20
15
10
5
120
100
80
60
40
16 Vin
28 Vin
20
40 Vin
0
0
50
60
70
80
90
100
110
0
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Load Current (%)
Base Plate Temperature (°C)
Figure 6: Output voltage vs. load current showing typical current limit
curves. See Current Limit section in the Application Notes.
Figure 5: Maximum output current vs. base plate temperature (nominal input
voltage).
Product # MCOTS-C-28-1R2-SM Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005339 Rev. E
12/06/2013
Page 5
MCOTS-C-28-1R2-SM
Output: 1.2V
Current: 25A
Technical Specification
Figure 7: Typical startup waveform. Input voltage pre-applied, ON/OFF Pin on
Ch 1.
Figure 8: Turn-on transient at full resistive load and zero output capacitance
initiated by Vin. ON/OFF Pin previously low. Ch 1: Vout (20V/div). Ch 3: Vin
(0.5V/div).
Figure 9: Input terminal current ripple, iC, at full rated output current and
nominal input voltage with SynQor MCOTS filter module (50 mA/div).
Bandwidth: 20MHz. See Figure 17.
Figure 10: Output voltage ripple, Vout, at nominal input voltage and rated load
current (5 mV/div). Load capacitance: 1µF ceramic capacitor and 10µF tantalum
capacitor. Bandwidth: 10 MHz. See Figure 17.
Figure 11: Output voltage response to step-change in load current (50%-
75%-50% of Iout(max); dI/dt = 0.1 A/µs). Load cap: 1 µF ceramic and 15 µF
tantalum capacitors. Ch 1: Vout (200mV/div), Ch 2: Iout (10A/div).
Figure 12: Output voltage response to step-change in input voltage (250V/ms).
Load cap: 100 µF electrolytic output capacitance. Ch 1: Vout (100mV/div), Ch 2:
Vin (20V/div).
Product # MCOTS-C-28-1R2-SM Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005339 Rev. E
12/06/2013
Page 6
MCOTS-C-28-1R2-SM
Output: 1.2V
Current: 25A
Technical Specification
1
0
-20
0.1
-40
0.01
0.001
-60
-80
35Vin
35Vin
48Vin
75Vin
-100
-120
48Vin
75Vin
0.0001
10
100
1,000
Hz
10,000
100,000
10
100
1,000
Hz
10,000
100,000
Figure 13: Magnitude of incremental output impedance (Zout = vout/iout) for
Figure 14: Magnitude of incremental forward transmission (FT = vout/vin)
minimum, nominal, and maximum input voltage at full rated power.
for minimum, nominal, and maximum input voltage at full rated power.
1000
100
-10
-15
-20
-25
-30
-35
-40
10
35Vin
35Vin
48Vin
75Vin
-45
-50
-55
48Vin
75Vin
1
10
100
1,000
Hz
10,000
100,000
10
100
1,000
Hz
10,000
100,000
Figure 15: Magnitude of incremental reverse transmission (RT = iin/iout) for
Figure 16: Magnitude of incremental input impedance (Zin = vin/iin) for
minimum, nominal, and maximum input voltage at full rated power.
minimum, nominal, and maximum input voltage at full rated power.
1 µF
ceramic capacitor
4.7 µH
source impedance
DC-DC
Converter
i
C
VOUT
VSOURCE
100 µF,
0.2Ω ESR
electrolytic capacitor
10 µF,
100mΩ ESR
tantalum capacitor
Figure 17: Test set-up diagram showing measurement points for Input Terminal
Ripple Current (Figure 9) and Output Voltage Ripple (Figure 10).
Figure 18: Load current (10A/div) as a function of time (2ms/div and 100ms/div)
when the converter attempts to turn on into a 10 mΩ short circuit.
Product # MCOTS-C-28-1R2-SM Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005339 Rev. E
12/06/2013
Page 7
MCOTS-C-28-1R2-SM
Output: 1.2V
Current: 25A
Technical Specification
BASIC OPERATION AND FEATURES
CONTROL FEATURES
This converter switches at a fixed frequency for predictable
EMI performance. Rectification of the transformer’s output
is accomplished with synchronous rectifiers. These devices,
which are MOSFETs with a very low on-state resistance,
dissipate far less energy than Schottky diodes. This is the
primary reason that the converter has such high efficiency,
even at very low output voltages and very high output currents.
REMOTE ON/OFF (Pin 2): The ON/OFF input, Pin 2, permits
the user to control when the converter is on or off. This input is
referenced to the return terminal of the input bus, Vin(-). The ON/
OFF signal is active low (meaning that a low turns the converter
on). Figure A details four possible circuits for driving the ON/OFF
pin. Figure B is a detailed look of the internal ON/OFF circuitry.
REMOTE SENSE(+) (Pins 7 and 5): The SENSE(+) inputs
correct for voltage drops along the conductors that connect the
converter’s output pins to the load.
These converters are offered totally encased to withstand
harsh environments and thermally demanding applications.
Dissipation throughout the converter is so low that
it does not require a heatsink for operation in many
applications; however, adding a heatsink provides improved
thermal derating performance in extreme situations.
Pin 7 should be connected to Vout(+) and Pin 5 should be
connected to Vout(-) at the point on the board where regulation is
desired. A remote connection at the load can adjust for a voltage
drop only as large as that specified in this datasheet, that is
This series of converters use the industry standard footprint
and pin-out configuration.
[Vout(+) - Vout(-)] – [Vsense(+) - Vsense(-)] <
Sense Range % x Vout
Pins 7 and 5 must be connected for proper regulation of the
output voltage. If these connections are not made, the converter
will deliver an output voltage that is slightly higher than its
specified value.
Note: the output over-voltage protection circuit senses the
voltage across the output (pins 8 and 4) to determine when it
should trigger, not the voltage across the converter’s sense leads
(pins 7 and 5). Therefore, the resistive drop on the board should
be small enough so that output OVP does not trigger, even during
load transients.
ON/OFF
ON/OFF
Vin(_)
5V
Vin(_)
Remote Enable Circuit
Negative Logic
(Permanently
Enabled)
10k
5V
ON/OFF
ON/OFF
50k
100pF
TTL/
CMOS
TTL
ON/OFF
Vin(_)
Vin(_)
Open Collector Enable Circuit
Vin(_)
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Figure B: Internal ON/OFF pin circuitry
Product # MCOTS-C-28-1R2-SM Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005339 Rev. E
12/06/2013
Page 8
MCOTS-C-28-1R2-SM
Output: 1.2V
Current: 25A
Technical Specification
OUTPUT VOLTAGE TRIM (Pin 6): The TRIM input permits the
user to adjust the output voltage across the sense leads up or
down according to the trim range specifications.
It is not necessary for the user to add capacitance at the Trim
pin. The node is internally bypassed to eliminate noise.
To decrease the output voltage, the user should connect a
resistor between Pin 6 and Pin 5 (SENSE(-) input). For a desired
decrease of the nominal output voltage, the value of the resistor
should be
Total DC Variation of VOUT: For the converter to meet its full
specifications, the maximum variation of the dc value of VOUT, due
to both trimming and remote load voltage drops, should not be
greater than that specified for the output voltage trim range.
511
R
=
- 10.22 (kW)
trim-down
(D%)
where
Vnominal – Vdesired
Vnominal
PROTECTION FEATURES
=
x 100%
D%
Input Under-Voltage Lockout: The converter is designed
to turn off when the input voltage is too low, helping avoid an
input system instability problem, described in more detail in
the application note titled “Input System Instability” on our
website. The lockout circuitry is a comparator with dc hysteresis.
When the input voltage is rising, it must exceed the typical Turn-
On Voltage Threshold value (listed on the specifications page)
before the converter will turn on. Once the converter is on,
the input voltage must fall below the typical Turn-Off Voltage
Threshold value before the converter will turn off.
To increase the output voltage, the user should connect a
resistor between Pin 6 and Pin 7 (SENSE(+) input). For a desired
increase of the nominal output voltage, the value of the resistor
should be
5.11VOUT x (100+D%)
511
_
R
_
=
(kW)
trim-up
10.22
)
(
0.600D%
D%
where
Vout = Nominal Output Voltage
Output Over-Voltage Limit: If the voltage across the output
pins exceeds the Output Over-Voltage Protection threshold, the
converter will immediately stop switching. This prevents damage
to the load circuit due to 1) excessive series resistance in output
current path from converter output pins to sense point, 2) a
release of a short-circuit condition, or 3) a release of a current
limit condition. Load capacitance determines exactly how high
the output voltage will rise in response to these conditions. After
200 ms the converter will automatically restart.
Trim graphs show the relationship between the trim resistor
value and Rtrim-up and Rtrim-down, showing the total range the
output voltage can be trimmed up or down.
Note: the TRIM feature does not affect the voltage at which the
output over-voltage protection circuit is triggered. Trimming the
output voltage too high may cause the over-voltage protection
circuit to engage, particularly during transients.
Over-Temperature Shutdown: A temperature sensor on
the converter senses the average temperature of the module.
The thermal shutdown circuit is designed to turn the converter
off when the temperature at the sensed location reaches the
Over-Temperature Shutdown value. It will allow the converter
to turn on again when the temperature of the sensed location
falls by the amount of the Over-Temperature Shutdown Restart
Hysteresis value.
10,000
1,000
100
Output Current Limit: If the output current exceeds the
Output Current Limit threshold, the converter turns off. The
converter then enters a “hiccup” mode where it repeatedly
turns on and off with a 350ms (typical) off time at small duty
cycle until the short circuit condition is removed. This prevents
excessive heating of the converter or the load board.
10
0
1
2
3
4
5
6
7
8
9
10
% Increase in Vout
% Decrease in Vout
Figure C: Trim graph for trim-up, trim down.
Product # MCOTS-C-28-1R2-SM Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005339 Rev. E
12/06/2013
Page 9
MCOTS-C-28-1R2-SM
Output: 1.2V
Current: 25A
Technical Specification
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur because Application Circuits: Figure D provides a typical circuit diagram
any dc-dc converter appears incrementally as a negative which details the input filtering and voltage trimming.
resistance load. A detailed application note titled “Input System
Instability” is available on the SynQor website which provides
an understanding of why this instability arises, and shows the
preferred solution for correcting it.
Vout(+)
Vin(+)
Electrolytic
Capacitor
Vsense(+)
External
Input
Filter
Rtrim-up
Vin
Trim
or
ON/OFF
Vin(_)
Cload
Rtrim-down
Iload
Vsense(_)
Vout(_)
Figure D: Typical application circuit (negative logic unit, permanently enabled).
Input Filtering and External Capacitance: Figure E provides in the Input Characteristics section on the Electrical Characteristics
a diagram showing the internal input filter components. This filter page. More detailed information is available in the application note
dramatically reduces input terminal ripple current, which otherwise titled “EMI Characteristics” on the SynQor website.
could exceed the rating of the converter's external electrolytic input
capacitor. The recommended external input capacitance is specified
L
Vin(+)
Vin(_)
Vout(+)
Vout(-)
Internal
Input
Filter
Converter
C
Figure E: Internal Input Filter Diagram
Product # MCOTS-C-28-1R2-SM Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005339 Rev. E
12/06/2013
Page 10
MCOTS-C-28-1R2-SM
Output: 1.2V
Current: 25A
Technical Specification
When the ON/OFF pin goes high after t2, the Startup Inhibit
Period has elapsed, and the output turns on within the typical
Turn-On Time.
Startup Inhibit Period: The Startup Inhibit Period ensures
that the converter will remain off for approximately 200 ms
when it is shut down for any reason. When an output short is
present, this generates a “hiccup” mode, which prevents the
converter from overheating. In all, there are six ways that the
converter can be shut down, initiating a Startup Inhibit Period:
Thermal Considerations: The maximum operating base-
plate temperature, TB, is 100 ºC. Refer to the thermal derating
curve, Figure 5, to see the available output current at baseplate
temperatures below 100 ºC.
• Input Under-Voltage Lockout
• Output Over-Voltage Protection
• Over Temperature Shutdown
• Current Limit
• Short Circuit Protection
• Turned off by the ON/OFF input
A power derating curve can be calculated for any heatsink that is
attached to the base-plate of the converter. It is only necessary
to determine the thermal resistance, RTHBA, of the chosen heatsink
between the base-plate and the ambient air for a given airflow
rate. This information is usually available from the heatsink
vendor. The following formula can then be used to determine the
maximum power the converter can dissipate for a given thermal
condition:
Figure F shows three turn-on scenarios, where a Startup Inhibit
Period is initiated at t0, t1, and t2:
Before time t0, when the input voltage is below the UVL
threshold, the unit is disabled by the Input Under-Voltage
Lockout feature. When the input voltage rises above the UVL
threshold, the Input Under-Voltage lockout is released, and a
Power-up Inhibit Time is initiated. At the end of this delay, the
ON/OFF pin is evaluated, and since it is active, the unit turns
on.
TB - TA
Pmax
=
diss
RTHBA
This value of power dissipation can then be used in conjunction
with the data shown in Figure 3 to determine the maximum load
current (and power) that the converter can deliver in the given
thermal condition.
At time t1, the unit is disabled by the ON/OFF pin, and it cannot
be enabled again until the Startup Inhibit Period has elapsed.
Vin
Under-Voltage
Lockout Turn-
On Threshold
ON/OFF
(neg logic)
ON
OFF
ON
OFF
ON
35ms
(turn on time)
Vout
2ms
(typical power-
up inhibit time)
200ms
200ms
t
t0
t1
t2
Figure F: Start-up Inhibit Period (turn-on time not to scale)
Product # MCOTS-C-28-1R2-SM Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005339 Rev. E
12/06/2013
Page 11
MCOTS-C-28-1R2-SM
Output: 1.2V
Current: 25A
Technical Specification
Mechanical Drawing – Normal Thermal Design Option
1.036±.020 (26.31±0.5)
.600 (15.24)
.450 (11.43)
.300 (7.62)
.150 (3.81)
0.500±.025
(12.7±0.63)
Overall height
8 7 6 5 4
Top View
0.18
(4.6)
1.436±.020
(36.47±0.5)
Side View
1.10
(27.9)
3
1
2
.143±.020
(3.63±0.5)
.300 (7.62)
.218±.020
(5.54±0.5)
.600 (15.24)
NOTES
PIN DESIGNATIONS
1)
2)
Baseplate flatness tolerance is 0.004" (.10mm) TIR for surface.
Pins 1-3, 5-7 are 0.040” (1.02mm) diameter, with 0.080” (2.03mm)
diameter standoff shoulders.
Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100" (2.54 mm)
diameter standoff shoulders.
All Pins: Material – Copper Alloy; Finish – Matte Tin over Nickel plate
Undimensioned components are shown for visual reference only.
Weight: 1.14oz (32.3g) typical
Pin
1
2
Name
Vin(+)
ON/OFF
Function
Positive input voltage
TTL input to turn converter on and off,
referenced to Vin(–), with internal pull up.
Input return
Output return
Negative remote sense
Output voltage trim
Positive remote sense
3)
3
4
5
6
7
8
IN RTN
OUT RTN
SENSE(–)
TRIM
SENSE(+)
Vout(+)
4)
5)
6)
7)
1
2
3
All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
Positive output voltage
8)
9)
Workmanship: Meets or exceeds IPC-A610 Class II
Recommended pin length is 0.03” (0.76mm) greater than the PCB
thickness.
Notes:
1)
SENSE(–) should be connected to Vout(–) either remotely or
at the converter.
2)
3)
Leave TRIM pin open for nominal output voltage.
SENSE(+) should be connected to Vout(+) either remotely or
at the converter.
Product # MCOTS-C-28-1R2-SM Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005339 Rev. E
12/06/2013
Page 12
MCOTS-C-28-1R2-SM
Output: 1.2V
Current: 25A
Technical Specification
Mechanical Drawing – Flanged Thermal Design Option
USE W/ 4-40 OR
M3 SCREW (4X)
RECOM. TORQUE
3 in. LB.
.600 [15.24]
.450 [11.43]
.300 [7.62]
.150 [3.81]
OVERALL HEIGHT
.500±.025
1.50 [38.1]
Ø.13 [3.3]R
1.30 [33]
1.036±.020
[26.31±0.5]
[12.7±0.63]
.18 [4.6]
SEE NOTE 5
.01 [0.2]
4
5 6 7 8
1.12
[28.3]
1.436
[36.47]
1.100
[27.94]
.94
[23.9]
.21
[5.3]
3
2
1
.13 [3.2]
.218±.020 [5.54±0.5]
.300 [7.62]
NOTES
PIN DESIGNATIONS - CONVERTER
1
2
3
4
5
6
APPLIED TORQUE PER SCREW SHOULD NOT EXCEED 5in-lb
(3in-lb RECOMMENDED).
BASEPLATE FLATNESS TOLERANCE IS 0.01" (.2mm)
TIR FOR SURFACE.
PINS 1-3, 5-7 ARE 0.040" (1.02mm) DIA. WITH 0.080" (2.03mm)
DIA. STANDOFF SHOULDERS
PINS 4 AND 8 ARE 0.062" (1.57mm) DIA. WITH 0.100" (2.54mm)
DIA STANDOFF SHOULDERS.
ALL PINS: MATERIAL: COPPER ALLOY
FINISH: MATTE TIN OVER NICKEL PLATE
UNDIMENSIONED COMPONENTS ARE SHOWN FOR VISUAL
REFERENCE ONLY
Pin
1
2
Name
Vin(+)
ON/OFF
Function
Positive input voltage
TTL input to turn converter on and off,
referenced to Vin(–), with internal pull up.
Input return
Output return
Negative remote sense
Output voltage trim
Positive remote sense
3
4
5
6
7
8
IN RTN
OUT RTN
SENSE(–)
TRIM
SENSE(+)
Vout(+)
1
2
3
Positive output voltage
Notes:
7
8
Weight: 1.4oz (38.4g) typical
ALL DIMENSIONS IN INCHES(mm)
1)
SENSE(–) should be connected to Vout(–) either remotely or
at the converter.
TOLERANCES:x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
Workmanship: Meets or exceeds IPC-A610 Class II
2)
3)
Leave TRIM pin open for nominal output voltage.
SENSE(+) should be connected to Vout(+) either remotely or
at the converter.
9
10 Recommended pin length is 0.03” (0.76mm) greater than the PCB
thickness.
11 A thermal interface material is required to assure proper heat
transfer from the flanged baseplate to the cooling surface. Thermal
grease, conductive pads, compounds, and other similar products are
available from many heatsink manufacturers.
Product # MCOTS-C-28-1R2-SM Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005339 Rev. E
12/06/2013
Page 13
MCOTS-C-28-1R2-SM
Output: 1.2V
Current: 25A
Technical Specification
Mil-COTS Qualification
# Tested Consistent with MIL- Consistent with MIL-STD-
Test Name
Life Testing
Details
(# Failed)
STD-883F Method
883F Method 5005
Visual, mechanical and electrical testing before, during and
after 1000 hour burn-in @ full load
15
(0)
Method 1005.8
Visual, mechanical and electrical testing before, during and
after shock and vibration tests
5
(0)
MIL-STD-202,
Methods 201A & 213B
Shock-Vibration
Humidity
8
(0)
+85˚C, 95% RH, 1000 hours, 2 minutes on / 6 hours off
Method 1004.7
Method 1010.8
Method 2003
Temperature
Cycling
500 cycles of -55˚C to +100˚C
(30 minute dwell at each temperature)
10
(0)
Condition A
15
(0)
Solderability
DMT
15 pins
-65˚C to +110˚C across full line and load specifications in
5˚C steps
7
(0)
2
(0)
Altitude
70,000 feet (21 km), see Note
Note: A conductive cooling design is generally needed for high altitude applications because of naturally poor convective cooling at rare atmospheres.
Mil-COTS DC-DC Converter and Filter Screening
Screening
Baseplate Operating Temperature
Storage Temperature
Pre-Cap Inspection
Temperature Cycling
Burn-In
Process Description
S-Grade
-55˚C to +100˚C
-65˚C to +135˚C
●
M-Grade
-55˚C to +100˚C
-65˚C to +135˚C
IPC-610, Class III
Method 1010, Condition B, 10 Cycles
100˚C Baseplate
●
●
12 Hours
25˚C
●
96 Hours
Final Electrical Test
Final Visual Inspection
100%
-55˚C, +25˚C, +100˚C
●
MIL-STD-2008
Mil-COTS MIL-STD-810G Qualification Testing
MIL-STD-810G Test
Fungus
Method
508.6
Description
Table 508.6-I
500.5 - Procedure I
500.5 - Procedure II
500.5 - Procedure III
513.6 - Procedure II
509.5
Storage: 70,000ft. / 2 Hr. duration
Operating; 70,000ft. / 2 Hr. duration; Ambient Temperature
Storage: 8,000ft. to 40,000ft.
Operating - 15g's
Altitude
Rapid Decompression
Acceleration
Salt Fog
Storage
501.5 - Procedure I
501.5 - Procedure II
502.5 - Procedure I
502.5 - Procedure II
Storage: 135°C / 3 hrs
High Temperature
Low Temperature
Operating: 100°C / 3 hrs
Storage: -65C / 4 hrs
Operating: -55C / 3 hrs
Temperature Shock
Rain
503.5 - Procedure I - C Storage: -65C to 135C; 12 cycles
506.5 - Procedure I
512.5 - Procedure I
507.5 - Procedure II
514.6 - Procedure I
516.6 - Procedure I
516.6 - Procedure VI
514.6 - Category 14
510.5 - Procedure I
510.5 - Procedure II
Wind Blown Rain
Non-Operating
Immersion
Humidity
Aggravated cycle @ 95% RH (Figure 507.5-7 aggravated temp - humidity cycle, 15 cycles)
10-2000 Hz, PSD level of 1.5 g2/Hz(54.6grms), duration = 1 hr/axis
20g's peak, 11ms, Functional Shock (Operating no load) (saw tooth)
Bench Handling Shock
Rotary wing aircraft - helicopter, 4hrs/axis, 20g's (sine sweep from 10 - 500HZ)
Blowing Dust
Random Vibration
Shock
Sinusoidal vibration
Sand and Dust
Blowing Sand
Product # MCOTS-C-28-1R2-SM Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005339 Rev. E
12/06/2013
Page 14
MCOTS-C-28-1R2-SM
Output: 1.2V
Current: 25A
Technical Specification
Ordering Information/ Part Numbering
Example MCOTS-C-28-1R2-SM-N-S
Not all combinations make valid part numbers, please contact SynQor for availability.
Input
Voltage
Output
Voltage
Family
Product
Package
Thermal Design Screening Level
Options
1R2: 1.2V
1R5: 1.5V
1R8: 1.8V
2R5: 2.5V
N: Normal
S: S-Grade
28: 16-40V
48: 34-75V
MCOTS C: Converter
3R3: 3.3V SM: Sixteenth Brick
[ ]: Standard Feature
M: M-Grade
05: 5.0V
07: 7.0V
12: 12V
15: 15V
F: Flanged
APPLICATION NOTES
PATENTS
A variety of application notes and technical white papers can be downloaded
in pdf format from our website.
SynQor holds the following U.S. patents, one or more of which apply to
each product listed in this document. Additional patent applications may
be pending or filed in the future.
5,999,417
6,894,468
7,119,524
7,765,687
6,222,742
6,896,526
7,269,034
7,787,261
6,545,890
6,927,987
7,272,021
8,023,290
6,577,109
7,050,309
7,272,023
8,149,597
6,594,159
7,072,190
7,558,083
8,493,751
6,731,520
7,085,146
7,564,702
Contact SynQor for further information and to order:
Warranty
SynQor offers a two (2) year limited warranty. Complete warranty
information is listed on our website or is available upon request from
SynQor.
Phone:
978-849-0600
Toll Free: 888-567-9596
Fax:
E-mail:
Web:
978-849-0602
mqnbofae@synqor.com
www.synqor.com
Information furnished by SynQor is believed to be accurate and reliable.
However, no responsibility is assumed by SynQor 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 SynQor.
Address: 155 Swanson Road
Boxborough, MA 01719
USA
Product # MCOTS-C-28-1R2-SM Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005339 Rev. E
12/06/2013
Page 15
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