MCOTS-C-28-3R3-HP-F-M [SYNQOR]
DC-DC Regulated Power Supply Module, 1 Output, 165W, Hybrid, HALF BRICK PACKAGE-8;
| 型号： | MCOTS-C-28-3R3-HP-F-M |
| 厂家： | 
SYNQOR WORLDWIDE HEADQUARTERS |
| 描述： | DC-DC Regulated Power Supply Module, 1 Output, 165W, Hybrid, HALF BRICK PACKAGE-8 |
| 文件： | 总15页 (文件大小：2632K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MCOTS-C-28-3R3-HP
Single Output
Half-brick
MILITARY COTS DC/DC CONVERTER
16-40V
16-50V
3.3V
50A
91% @ 25A / 90% @ 50A
Efficiency
Continuous Input Transient Input
Output
Output
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
@ 50A
VERTER
OUT
3V
MCOTS-C-28-3R3-HP-N
3.
DC/DC CON
IN
28V
Designed and Manufactured in the USA
Operational Features
Safety Features
• High efficiency, 90% at full rated load current
• Operating input voltage range: 16-40V
• Fixed frequency switching provides predictable EMI
• No minimum load requirement
• 2250V, 30 MΩ input-to-output isolation
• Certified 60950-1 requirement for basic insulation
(see Standards and Qualifications page)
Protection Features
Mechanical Features
• Input under-voltage lockout
Output current limit and short circuit protection
Active back bias limit
• Industry standard half-brick pin-out configuration
• Size:
2.49” x 2.39” x 0.51”
Output over-voltage protection
Thermal shutdown
(63.1 x 60.6 x 13.0 mm)
• Total weight: 4.9 oz. (139 g)
• Flanged baseplate version available
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-28-3R3-HP Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005317 Rev. C
05/07/10
Page 1
MCOTS-C-28-3R3-HP
Output: 3.3V
Current: 50A
Technical Specification
BLOCK DIAGRAM
REGULATION STAGE
ISOLATION STAGE
8
CURRENT
SENSE
1
POSITIVE
OUTPUT
POSITIVE
INPUT
T1
T2
T1
T2
3
4
INPUT
RETURN
OUTPUT
RETURN
GATE DRIVERS
GATE CONTROL
UVLO
OVSD
CURRENT
LIMIT
6
TRIM
2
OPTO-ISOLATION
ON/OFF
PRIMARY
CONTROL
SECONDARY
CONTROL
7
+ SENSE
5
−
SENSE
DATA COUPLING
TYPICAL CONNECTION DIAGRAM
Vout(+)
Vin(+)
Electrolytic
Capacitor
Vsense(+)
External
Rtrim-up
Vin
Input
Filter
Trim
or
ON/OFF
Vin(_)
Cload
Rtrim-down
Iload
Vsense(_)
Vout(_)
Product # MCOTS-C-28-3R3-HP Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005317 Rev. C
05/07/10
Page 2
MCOTS-C-28-3R3-HP
Output: 3.3V
Current: 50A
Technical Specification
MCOTS-C-28-3R3-HP ELECTRICAL CHARACTERISTICS
Tb = 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
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage
60
40
50
V
V
V
Continuous
Continuous
1 s transient, square wave
Input to Output
Input to Base-Plate
Output to Base-Plate
Operating Temperature
2250
2250
2250
100
135
18
Vdc
Vdc
Vdc
°C
°C
V
-55
-65
-2
Baseplate 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
16
28
40
V
50V transient for 1 s; see Note 1
14.8
13.8
15.1
14.1
1.0
100
1.1\13.2
15.4
14.4
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
16.6
160
4
130
1.8
0.2
220
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
See Figure 6
RMS
Fast acting external fuse recommended
mA
A
20
3.267
3.3
3.333
V
±0.1
±0.1
±0.3
±0.3
50
%
%
mV
V
-50
3.218
3.383
Over sample, line, load, temperature & life
20 MHz bandwidth
Full Load
Full Load
Subject to thermal derating
Output Voltage 10% Low
50
10
100
20
50
mV
mV
A
A
V
A
mA
µF
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
0
55
60
1.5
1.45
0.125
65
Negative current drawn from output
Negative current drawn from output
Vout nominal at full load (resistive load)
0
50
10000
70
500
mV
µs
50% to 75% to 50% IOUT max
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
Output Over-Voltage Protection
EFFICIENCY
10
4.191
#N/A!
%
V
#N/A!
%
Across Pins 8 & 4
Over full temp range
#N/A!
3.861
#N/A!
4.026
#N/A!
90
100% Load
See Figure 1 for efficiency curve
50% Load
91
%
See Figure 1 for efficiency curve
Note 1: 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 2: Trim-up range is limited below 10% at low line and full load.
Product # MCOTS-C-28-3R3-HP Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005317 Rev. C
05/07/10
Page 3
MCOTS-C-28-3R3-HP
Output: 3.3V
Current: 50A
Technical Specification
MCOTS-C-28-3R3-HP ELECTRICAL CHARACTERISTICS
Tb = 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
Start-Up Inhibit Time
Output Voltage Overshoot
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
Isolation Resistance
10
230
0
ms
ms
%
Full load, Vout=90% nom.
See Figure F
Maximum Output Capacitance
200
250
See Absolute Maximum Ratings
See Note 1
30
1000
MΩ
pF
Isolation Capacitance (input to output)
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
Maximum Baseplate Temperature, Tb
125
125
125
100
°C
°C
°C
°C
Package rated to 150 °C
UL rated max operating temp 130 °C
FEATURE CHARACTERISTICS
Switching Frequency
255
275
295
kHz
Isolation stage switching freq. is half this
ON/OFF Control
Off-State Voltage
On-State Voltage
2.4
-2
18
0.8
V
V
ON/OFF Control
Pull-Up Voltage
5
V
Pull-Up Resistance
50
125
10
kΩ
°C
°C
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
Average PCB Temperature
4.1
0.92
106 Hrs. Ground Benign, 70°C Tb
106 Hrs. Ground Mobile, 70°C Tb
Note 1: Higher values of isolation capacitance can be added external to the module.
STANDARDS COMPLIANCE
Parameter
Notes & Conditions
STANDARDS COMPLIANCE
UL 60950-1:2003
Basic Insulation
CAN/CSA-C22.2 No. 60950-1:2003
EN60950-1:2001
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-28-3R3-HP Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005317 Rev. C
05/07/10
Page 4
MCOTS-C-28-3R3-HP
Output: 3.3V
Current: 50A
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
30
35
40
45
50
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.
22
20
18
16
14
12
10
8
22
20
18
16
14
12
10
8
6
6
16 Vin
16 Vin
28 Vin
40 Vin
4
4
28 Vin
2
40 Vin
2
0
0
-55ºC
25ºC
100ºC
0
5
10
15
20
25
30
35
40
45
50
Case Temperature (ºC)
Load Current (A)
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.
4.0
3.5
3.0
2.5
2.0
1.5
60
50
40
30
20
10
0
16 Vin
1.0
28 Vin
0.5
40 Vin
0.0
50
60
70
80
90
100
110
0
10
20
30
40
50
60
70
Load Current (A)
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-28-3R3-HP Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005317 Rev. C
05/07/10
Page 5
MCOTS-C-28-3R3-HP
Output: 3.3V
Current: 50A
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
(1V/div).
Figure 9: Input terminal current ripple, i , at full rated output current and
nominal input voltage with SynQor MCOTS filter module (200 mA/div).
Bandwidth: 20MHz. See Figure 17.
Figure 10: Output voltage ripple, Vout, at nominal input voltage and rated
load current (50 mV/div). Load capacitance: 1µF ceramic capacitor and 10µF
tantalum capacitor. Bandwidth: 10 MHz. See Figure 17.
C
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 (100mV/div), Ch 2: Iout (20A/div).
Figure 12: Output voltage response to step-change in input voltage (250V/ms).
Load cap: 100 µF electrolytic output capacitance. Ch 1: Vout (200mV/div), Ch
2: Vin (20V/div).
Product # MCOTS-C-28-3R3-HP Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005317 Rev. C
05/07/10
Page 6
MCOTS-C-28-3R3-HP
Output: 3.3V
Current: 50A
Technical Specification
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
0.1
0.01
0.001
28Vin
40Vin
16Vin
28Vin
40Vin
16Vin
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 (Z
= v
/
Figure 14: Magnitude of incremental forward transmission (FT = v
/
out
out
out
v ) for minimum, nominal, and maximum input voltage at full rated
i
) for minimum, nominal, and maximum input voltage at full rated
out
in
power.
power.
1000
-10
-20
-30
-40
-50
100
10
1
28Vin
40Vin
16Vin
28Vin
40Vin
16Vin
0.1
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 = i
/
Figure 16: Magnitude of incremental input impedance (Z = v /i )
in in in
for minimum, nominal, and maximum input voltage at full rated power.
in
) for minimum, nominal, and maximum input voltage at full rated
i
out
power.
1 µF
ceramic capacitor
4.7 µH
source impedance
iC
DC/DC
Converter
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
Figure 18: Load current (20A/div) as a function of time (1ms/div and 50ms/div)
Ripple Current (Figure 9) and Output Voltage Ripple (Figure 10).
when the converter attempts to turn on into a 10 mΩ short circuit.
Product # MCOTS-C-28-3R3-HP Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005317 Rev. C
05/07/10
Page 7
MCOTS-C-28-3R3-HP
Output: 3.3V
Current: 50A
Technical Specification
CONTROL FEATURES
BASIC OPERATION AND FEATURES
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.
This Mil-COTS converter series uses a two-stage power
conversion topology. The first stage is a buck-converter that
keeps the output voltage constant over variations in line, load,
and temperature. The second stage uses a transformer to
provide the functions of input/output isolation and voltage
step-up or step-down to achieve the output voltage required.
Both the first stage and the second stage switch at a fixed
frequency for predictable EMI performance. Rectification of the
transformer’soutputisaccomplishedwithsynchronousrectifiers.
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 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.
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
These converter 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.
[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.
This series of converters use the industry standard footprint
and pin-out configuration.
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)
50k
5V
ON/OFF
ON/OFF
Vin(_)
50k
TTL/
CMOS
TTL
ON/OFF
Vin(_)
100pF
OPEN
Vin(_)
Open Collector Enable Circuit
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Figure B: Internal ON/OFF pin circuitry
Product # MCOTS-C-28-3R3-HP Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005317 Rev. C
05/07/10
Page 8
MCOTS-C-28-3R3-HP
Output: 3.3V
Current: 50A
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
)
(
1.225D%
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: The maximum current limit remains
constant as the output voltage drops. However, once the
impedance of the load across the output is small enough to
make the output voltage drop below the specified Output
DC Current-Limit Shutdown Voltage, the converter turns off.
10
The converter then enters a “hiccup” mode where it repeatedly
turns on and off at a 5 Hz (nominal) frequency with 5% duty
cycle until the short circuit condition is removed. This prevents
excessive heating of the converter or the load board.
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20
% Increase in Vout % Decrease in Vout
Figure C: Trim graph for trim-up, trim down.
Product # MCOTS-C-28-3R3-HP Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005317 Rev. C
05/07/10
Page 9
MCOTS-C-28-3R3-HP
Output: 3.3V
Current: 50A
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 is specified in the Input Characteristics section on the Electrical
a diagram showing the internal input filter components. This filter Characteristics page. More detailed information is available in
dramatically reduces input terminal ripple current, which otherwise the application note titled “EMI Characteristics” on the SynQor
could exceed the rating of the converter's external electrolytic website.
input capacitor. The recommended external input capacitance
L
Vin(+)
Vin(_)
Vout(+)
Vout(-)
Internal
Input
Filter
Converter
C
Figure E: Internal Input Filter Diagram
Product # MCOTS-C-28-3R3-HP Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005317 Rev. C
05/07/10
Page 10
MCOTS-C-28-3R3-HP
Output: 3.3V
Current: 50A
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 5 Hz “hiccup” mode, which prevents the
converter from overheating. In all, there are seven 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
• Input Over-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:
TB - TA
Pmax
=
diss
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 Startup Inhibit Period is
initiated. At the end of this delay, the ON/OFF pin is evaluated,
and since it is active, the unit turns on.
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
10ms
(turn on time)
Vout
200ms
(typical start-up
inhibit period)
200ms
200ms
t
t0
t1
t2
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # MCOTS-C-28-3R3-HP Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005317 Rev. C
05/07/10
Page 11
MCOTS-C-28-3R3-HP
Output: 3.3V
Current: 50A
Technical Specification
Mechanical Drawing – Normal Heatsink Option
2.486 ±.020 [ 63,14 ±0,5 ]
2.00 [ 50,8
1.400 [ 35,56
1.000 [ 25,4
.700 [ 17,78
.400 [ 10,16
]
]
]
]
]
+.002
-.005
.512
.243 ±.020
[ 6,17 ±0,5 ]
+0,05
-0,12
13
.163
[ 4,14
[
]
]
OVERALL
HEIGHT
8
7
6
5
4
.243 ±.020
[ 6,17 ±0,5]
2.386 ±.020
[ 60,6 ±0,5 ]
TOP VIEW
1.90
[ 48,3
]
SIDE VIEW
1.90
[ 48,3
]
.233 ±.020
[ 5,92 ±0,5 ]
2
3
1
+.007
.027
THRU HOLE
M3 (SEE NOTE 8)
STANDOFFS (4)
-.010
+0,17
.543 ±.020 [ 13,79 ±0,5]
.400 [ 10,16
1.400 [ 35,56
0,69
[
-0,25 ]
]
BOTTOMSIDE CLEARANCE
]
NOTES
PIN DESIGNATIONS
1)
2)
3)
Applied torque per screw should not exceed 6in-lb (0.7 Nm).
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.
Pin
1
Name
Vin(+)
Function
Positive input voltage
2
ON/OFF
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
Positive output voltage
4)
Pins 4 and 8 are 0.080” (2.03 mm) diameter with 0.125" (3.18 mm)
diameter standoff shoulders.
3
4
5
6
7
8
IN RTN
OUT RTN
SENSE(–)
TRIM
SENSE(+)
Vout(+)
1
5)
6)
7)
8)
9)
All Pins: Material – Copper Alloy; Finish – Matte Tin over Nickel plate
Undimensioned components are shown for visual reference only.
Weight: 4.9 oz. (139 g) typical
Threaded or Non-Threaded options available
All dimensions in inches (mm)
2
3
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
10) Workmanship: Meets or exceeds IPC-A610 Class II
11) 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-28-3R3-HP Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005317 Rev. C
05/07/10
Page 12
MCOTS-C-28-3R3-HP
Output: 3.3V
Current: 50A
Technical Specification
Mechanical Drawing – Flanged Heatsink Option
NOTES
PIN DESIGNATIONS
1)
Applied torque per screw should not exceed 5in-lb (3in-lb
Pin
1
Name
Vin(+)
Function
recommended).
Positive input voltage
2)
3)
Baseplate flatness tolerance is 0.01” (.25mm) 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 0.080” (2.03 mm) diameter with 0.125" (3.18 mm)
diameter standoff shoulders.
All Pins: Material – Copper Alloy; Finish – Matte Tin over Nickel plate
Weight: 4.8 oz. (137 g) typical
Undimensioned components are shown for visual reference only.
All dimensions in inches (mm)
2
ON/OFF
TTL input to turn converter on and off,
referenced to Vin(–), with internal pull up.
Input return
3
4
5
6
7
8
IN RTN
OUT RTN
SENSE(–)
TRIM
SENSE(+)
Vout(+)
4)
Output return
Negative remote sense
Output voltage trim
Positive remote sense
1
2
5)
6)
7)
8)
3
Positive output voltage
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
Notes:
1)
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.
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-28-3R3-HP Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005317 Rev. C
05/07/10
Page 13
MCOTS-C-28-3R3-HP
Output: 3.3V
Current: 50A
Technical Specification
Mil-COTS Qualification
Consistent with
MIL-STD-883F
Method
Consistent with
MIL-STD-883F
Method 5005
# Tested
(# Failed)
Test Name
Life Testing
Details
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 & 213A
Shock-Vibration
8
+85˚C, 85% RH, 1000 hours, 2 minutes
on/6 hours off
Humidity
Method 1004.7
Method 1010.8
Method 2003
(0)
10
(0)
15
(0)
7
500 cycles of -55˚C to +100˚C (30
minute dwell at each temperature
Temperature Cycling
Solderability
DMT
Condition A
15 pins
-65˚C to +110˚C across full line and
load specifications in 5˚C steps
(0)
2
(0)
70,000 feet (21 km), see Note
Altitude
Note: A conductive cooling design is generally needed for high altitude applications because of naturally poor convective
cooling at rare atmospheres.
Mil-COTS 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
100%
12 Hours
25˚C
●
96 Hours
Final Electrical Test
Final Visual Inspection
-55˚C, +25˚C, +100˚C
●
MIL-STD-2008
Product # MCOTS-C-28-3R3-HP Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005317 Rev. C
05/07/10
Page 14
MCOTS-C-28-3R3-HP
Output: 3.3V
Current: 50A
Technical Specification
Ordering Information/ Part Numbering
Example MCOTS-C-28-3R3-HP-N-S
Not all combinations make valid part numbers, please contact SynQor for availability. See product summary page for details.
Input
Voltage
Output
Voltage
Heatsink
Option
Screening
Level
Family Product
Package
Options
1R8:1.8V
3R3:3.3V
05:5V
12:12V
15:15V
24:24V
28:28V
40:40V
48:48V
N:Normal
Threaded
D:Normal Non-
Threaded
28: 16-40V
48: 34-75V
HP:Half Brick
S: S-Grade
M: M-Grade
[ ]:Standard
MCOTS C: Converter
Peta
Feature
F:Flanged
PATENTS
APPLICATION NOTES
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.
A variety of application notes and technical white papers can be downloaded
in pdf format from our website.
5,999,417
6,731,520
7,072,190
7,272,023
6,222,742
6,894,468
7,085,146
7,558,083
6,545,890
6,896,526
7,119,524
7,564,702
6,577,109
6,927,987
7,269,034
6,594,159
7,050,309
7,272,021
Contact SynQor for further information:
Warranty
Phone:
978-849-0600
SynQor offers a two (2) year limited warranty. Complete warranty
information is listed on our website or is available upon request from
SynQor.
Toll Free: 888-567-9596
Fax:
978-849-0602
E-mail:
Web:
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-28-3R3-HP Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005317 Rev. C
05/07/10
Page 15
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