10.5A/252W

MCOTS-C-48-24-HP
Single Output
Half-brick
MILITARY COTS DC-DC CONVERTER
34-75V
Continuous Input
34-100V
Transient Input
24V
Output
10.5A
Output
92% @ 5.3A / 90% @ 10.5A
Efficiency
Operation: -55°C to +100°C
Mil-COTS
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
MCOT
S
DC-D -C-48-24
-H
C CON
48V
VERT P-N-M
ER
IN 24V
OUT @ 1
0.5A
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)
Mechanical Features
• Industry standard half-brick pin-out configuration
• Size:
2.49” x 2.39” x 0.51”
(63.1 x 60.6 x 13.0 mm)
• Total weight: 4.7 oz. (134 g)
• Flanged baseplate version available
Protection Features
•
•
•
•
•
Input under-voltage lockout
Output current limit and short circuit protection
Active back bias limit
Output over-voltage protection
Thermal shutdown
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, F)
Product # MCOTS-C-48-24-HP
Phone 1-888-567-9596
Designed and Manufactured in the USA
Operational Features
•
•
•
•
High efficiency, 90% at full rated load current
Operating input voltage range: 34-75V
Fixed frequency switching provides predictable EMI
No minimum load requirement
Control Features
• On/Off control referenced to input return
• Remote sense for the output voltage
• Output voltage trim range of +10%, -20%
Screening/Qualification
•
•
•
•
AS9100 and ISO 9001:2008 certified facility
Qualified to MIL-STD-810
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
www.synqor.com
Doc.# 005-0005424
Rev. E
09/02/14
Page 1
MCOTS-C-48-24-HP
Output: 24V
Current: 10.5A
Technical Diagrams
BLOCK DIAGRAM
REGULATION STAGE
ISOLATION STAGE
CURRENT
SENSE
1
POSITIVE
INPUT
T1
T2
8
T1
T2
3
POSITIVE
OUTPUT
4
ISOLATION BARRIER
INPUT
RETURN
GATE DRIVERS
CURRENT
LIMIT
UVLO
OVSD
2
ON/OFF
OPTO-ISOLATION
PRIMARY
CONTROL
OUTPUT
RETURN
GATE CONTROL
6
TRIM
SECONDARY
CONTROL
7
+ SENSE
5
− SENSE
DATA COUPLING
TYPICAL CONNECTION DIAGRAM
Vin(+)
Vin
External
Input
Filter
Electrolytic
Capacitor
Vout(+)
Vsense(+)
ON/OFF
Trim
Vsense(_)
Vin(_)
Product # MCOTS-C-48-24-HP
Phone 1-888-567-9596
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Rtrim-up
or
Rtrim-down
Cload
Iload
Vout(_)
Doc.# 005-0005424
Rev. E
09/02/14
Page 2
MCOTS-C-48-24-HP
Output: 24V
Current: 10.5A
Technical Specification
MCOTS-C-48-24-HP ELECTRICAL CHARACTERISTICS
Tb = 25 °C, Vin = 48Vdc 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.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
-1
Operating
Operating Transient Protection
Isolation Voltage
Input to Output
Input to Base-Plate
Output to Base-Plate
Operating Temperature
-55
Storage Temperature
-65
Voltage at ON/OFF input pin
-2
INPUT CHARACTERISTICS
Operating Input Voltage Range
34
48
Input Under-Voltage Lockout
Turn-On Voltage Threshold
32.7
33.1
Turn-Off Voltage Threshold
30.4
30.8
Lockout Voltage Hysteresis
2.3
Recommended External Input Capacitance
100
Input Filter Component Values (L\C)
3.4\4.0
Maximum Input Current
No-Load Input Current
60
Disabled Input Current
1
Response to Input Transient
1.2
Input Terminal Ripple Current
200
Recommended Input Fuse
OUTPUT CHARACTERISTICS
Output Voltage Set Point
23.76
24
Output Voltage Regulation
Over Line
±0.1
Over Load
±0.1
Over Temperature
-360
Total Output Voltage Range
23.4
Output Voltage Ripple and Noise
Peak-to-Peak
0
130
RMS
25
Operating Output Current Range
0
Output DC Current-Limit Inception
11.55
12.6
Output DC Current-Limit Shutdown Voltage
13
Back-Drive Current Limit while Enabled
0.2
Back-Drive Current Limit while Disabled
1
Maximum Output Capacitance
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs)
1300
Settling Time
400
Output Voltage Trim Range
-20
Output Voltage Remote Sense Range
Output Over-Voltage Protection
28.1
29.3
EFFICIENCY
100% Load
90
50% Load
92
Note 1: Output is terminated with 1 µF ceramic and 15 µF low-ESR tantalum
noise, consult SynQor applications support (e-mail: [email protected])
Note 2: Trim-up range is limited below 10% at low line and full load.
Product # MCOTS-C-48-24-HP
Phone 1-888-567-9596
Max.
Units
100
75
100
V
V
V
2250
2250
2250
100
135
18
V dc
V dc
V dc
°C
°C
V
75
V
33.5
31.2
20
V
V
V
µF
µH\µF
A
mA
mA
V
mA
A
24.24
V
±0.3
±0.3
360
24.6
%
%
mV
V
260
50
10.5
13.65
400
mV
mV
A
A
V
A
mA
µF
10
10
30.5
mV
µs
%
%
V
10.9
100
2
Notes & Conditions
Continuous
Continuous
100 ms transient, square wave
Baseplate temperature
100V transient for 100 ms
Typical ESR 0.1-0.2 Ω
Internal values; see Figure E
Vin min; trim up; in current limit
See Figure 12
RMS
Fast acting external fuse recommended
Over sample, line, load, temperature & life
20 MHz bandwidth; see Note 1
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 2
Across Pins 8&4
Over full temp range
%
See Figure 1 for efficiency curve
%
See Figure 1 for efficiency curve
capacitors. For applications requiring reduced output voltage ripple and
www.synqor.com
Doc.# 005-0005424
Rev. E
09/02/14
Page 3
MCOTS-C-48-24-HP
Output: 24V
Current: 10.5A
Technical Specification
MCOTS-C-48-24-HP ELECTRICAL CHARACTERISTICS
Tb = 25 °C, Vin = 48Vdc 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.
DYNAMIC CHARACTERISTICS
Turn-On Transient
Turn-On Time
10
Start-Up Inhibit Time
180
200
220
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
255
275
295
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
4.1
Calculated MTBF per MIL-HDBK-217F
0.92
Note 1: Higher values of isolation capacitance can be added external to the module.
Units
ms
ms
%
Notes & Conditions
Full load, Vout=90% nom.
Figure F
Maximum Output Capacitance
See Absolute Maximum Ratings
MΩ
pF
See Note 1
°C
°C
°C
°C
Package rated to 150 °C
UL rated max operating temp 130 °C
kHz
Isolation stage switching freq. is half this
V
Application notes Figures A & B
V
kΩ
°C
°C
106 Hrs.
106 Hrs.
Average PCB Temperature
Ground Benign, 70°C Tb
Ground Mobile, 70°C Tb
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-48-24-HP
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005424
Rev. E
09/02/14
Page 4
MCOTS-C-48-24-HP
Output: 24V
Current: 10.5A
100
100
95
95
90
90
Efficiency (%)
Efficiency (%)
Technical Charts
85
80
75
70
3
4
5
6
7
Load Current (A)
8
9
10
100ºC
Figure 2: Efficiency at nominal output voltage and 60% rated power vs.
case temperature for minimum, nominal, and maximum input voltage.
30
30
25
25
20
15
10
34 Vin
5
25ºC
Case Temperature (ºC)
Power Dissipation (W)
Power Dissipation (W)
Figure 1: Efficiency at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
75 Vin
60
-55ºC
60
2
34 Vin
65
75 Vin
1
75
48 Vin
48 Vin
0
80
70
34 Vin
65
85
20
15
10
34 Vin
5
48 Vin
48 Vin
75 Vin
75 Vin
0
-55ºC
0
0
1
2
3
4
5
6
7
Load Current (A)
8
9
10
Figure 3: Power dissipation at nominal output voltage vs. load current
for minimum, nominal, and maximum input voltage at TCASE =25°C.
28
24
10
Output Voltage (V)
8
Iout (A)
100ºC
Figure 4: Power dissipation at nominal output voltage and 60% rated
power vs. case temperature for minimum, nominal, and maximum input
voltage.
12
6
4
2
0
25ºC
Case Temperature (ºC)
20
16
12
8
34 Vin
48 Vin
4
50
60
70
80
90
100
110
0
Base Plate Temperature (°C)
Figure 5: Maximum output current vs. base plate temperature (nominal input
voltage).
Product # MCOTS-C-48-24-HP
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75 Vin
0
2
4
6
8
10
Load Current (A)
12
14
16
Figure 6: Output voltage vs. load current showing typical current limit
curves. See Current Limit section in the Application Notes.
www.synqor.com
Doc.# 005-0005424
Rev. E
09/02/14
Page 5
MCOTS-C-48-24-HP
Output: 24V
Current: 10.5A
Technical Charts
Figure 7: Typical startup waveform. Input voltage pre-applied, ON/OFF Pin. Ch
1: ON/OFF Pin (5V/div). Ch 3: Vout (10V/div).
Figure 8: Turn-on transient at full resistive load and zero output capacitance
initiated by Vin. ON/OFF Pin previously low. Ch 1: Vin (50V/div). Ch 3: Vout
(5V/div).
Figure 9: Input terminal current ripple, iC, 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 (20 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 (1V/div), Ch 2: Iout (5A/div).
Figure 12: Output voltage response to step-change in input voltage (250V/ms).
Load cap: 100 µF electrolytic output capacitance. Ch 1: Vout (1V/div), Ch 2: Vin
(50V/div).
Product # MCOTS-C-48-24-HP
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005424
Rev. E
09/02/14
Page 6
MCOTS-C-48-24-HP
Output: 24V
Current: 10.5A
Technical Charts
0
10
Forward Transmission (dB)
Output Impedance (ohms)
-10
1
0.1
0.01
48Vin
75Vin
34Vin
100
1,000
10,000
-30
-40
-50
-60
-80
100,000
10
Hz
100
1,000
10,000
100,000
Hz
Figure 13: Magnitude of incremental output impedance (Zout = vout/
iout) for minimum, nominal, and maximum input voltage at full rated
power.
Figure 14: Magnitude of incremental forward transmission (FT = vout/
vin) for minimum, nominal, and maximum input voltage at full rated
power.
1000
Input Impedance (Ohms)
10
Reverse Transmission (dB)
48Vin
75Vin
34Vin
-70
0.001
10
-20
0
-10
-20
-30
48Vin
-40
100
10
48Vin
1
75Vin
75Vin
34Vin
34Vin
0.1
-50
10
100
1,000
10,000
10
100,000
100
Figure 15: Magnitude of incremental reverse transmission (RT = iin/
iout) for minimum, nominal, and maximum input voltage at full rated
power.
10,000
100,000
Figure 16: Magnitude of incremental input impedance (Zin = vin/iin)
for minimum, nominal, and maximum input voltage at full rated power.
1 µF
ceramic capacitor
4.7 µH
source impedance
iC
VSOURCE
1,000
Hz
Hz
100 µF,
0.2Ω ESR
electrolytic capacitor
DC-DC
Converter
VOUT
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).
Product # MCOTS-C-48-24-HP
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Figure 18: Load current (5A/div) as a function of time (2ms/div and 50ms/div)
when the converter attempts to turn on into a 10 mΩ short circuit.
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Doc.# 005-0005424
Rev. E
09/02/14
Page 7
MCOTS-C-48-24-HP
Output: 24V
Current: 10.5A
Application Section
BASIC OPERATION AND FEATURES
CONTROL FEATURES
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.
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.
Both the first stage and the second stage switch 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.
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.
This series of converters use the industry standard footprint
and pin-out configuration.
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
[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(_)
Vin(_)
5V
Negative Logic
(Permanently
Enabled)
5V
ON/OFF
Remote Enable Circuit
50k
ON/OFF
TTL/
CMOS
Vin(_)
Open Collector Enable Circuit
Vin(_)
100pF
Vin(_)
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Product # MCOTS-C-48-24-HP
50k
TTL
ON/OFF
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Figure B: Internal ON/OFF pin circuitry
Doc.# 005-0005424
Rev. E
09/02/14
Page 8
MCOTS-C-48-24-HP
Output: 24V
Current: 10.5A
Application Section
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.
Rtrim-down =
511
(D%
)- 10.22 (kW)
where
D% =
Vnominal – Vdesired
Vnominal
PROTECTION FEATURES
x 100%
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
Rtrim-up =
where
(
5.11VOUT x (100+D%)
1.225D%
_ 511 _ 10.22
D%
)
(kW)
Vout = Nominal Output Voltage
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.
Trim Resistance (kΩ)
100,000
10,000
1,000
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 TurnOn 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.
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.
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.
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.
100
10
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-48-24-HP
Phone 1-888-567-9596
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.
www.synqor.com
Doc.# 005-0005424
Rev. E
09/02/14
Page 9
MCOTS-C-48-24-HP
Output: 24V
Current: 10.5A
Application Section
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur because
any dc-dc converter appears incrementally as a negative
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.
Application Circuits: Figure D provides a typical circuit diagram
which details the input filtering and voltage trimming.
Vout(+)
Vin(+)
Vin
External
Input
Filter
Electrolytic
Capacitor
Vsense(+)
ON/OFF
Trim
Vsense(_)
Vin(_)
Rtrim-up
or
Cload
Rtrim-down
Iload
Vout(_)
Figure D: Typical application circuit (negative logic unit, permanently enabled).
Input Filtering and External Capacitance: Figure E provides
a diagram showing the internal input filter components. This filter
dramatically reduces input terminal ripple current, which otherwise
could exceed the rating of the converter's external electrolytic
input capacitor. The recommended external input capacitance
is specified in the Input Characteristics section on the Electrical
Characteristics page. More detailed information is available in
the application note titled “EMI Characteristics” on the SynQor
website.
L
Vin(+)
Vout(+)
Internal
Input
Filter
C
Converter
Vin(_)
Vout(-)
Figure E: Internal Input Filter Diagram
Product # MCOTS-C-48-24-HP
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Doc.# 005-0005424
Rev. E
09/02/14
Page 10
MCOTS-C-48-24-HP
Output: 24V
Current: 10.5A
Application Section
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:
•
•
•
•
•
•
•
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
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.
Thermal Considerations: The maximum operating baseplate 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.
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, RTH , 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:
BA
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 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.
max
Pdiss =
T -T
B
RTH
A
BA
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 TurnOn Threshold
ON/OFF
(neg logic)
ON
OFF ON
Vout
OFF
ON
10ms
(turn on time)
200ms
215ms
(initial start-up
inhibit period)
(typical start-up
inhibit period)
t1
t0
200ms
t
t2
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # MCOTS-C-48-24-HP
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005424
Rev. E
09/02/14
Page 11
MCOTS-C-48-24-HP
Output: 24V
Current: 10.5A
Standard Mechanical Drawing
2.486 [63.14]
2.000 [50.80]
SEATING PLANE HEIGHT
0.512±0.005
[ 13.00±0.12 ]
PIN EXTENSION
0.163
[4.14]
1.000 [25.40]
0.700 [17.78]
4
TOP VIEW
5
6
7
8
0.004 [0.10]
1.900 2.386
[48.26] [60.60]
0.01
[0.3]
1.900
[48.26]
3
1
0.30
[7.6]
1
0.400 [10.16]
THRU HOLE STANDOFFS
SEE NOTE 1
(4 PLCS)
NOTES
1.400 [35.56]
PIN DESIGNATIONS
1) THREADED: APPLIED TORQUE PER M3 SCREW 4in-lb
RECOMMENDED (5in-lb LIMIT).
NONTHREADED: DIA 0.125" (3.18mm)
2) BASEPLATE FLATNESS TOLERANCE IS 0.004" (.10mm)
TIR FOR SURFACE.
3) PINS 1-3 AND 5-7 ARE 0.040" (1.02mm) DIA. WITH 0.080"
(2.03mm) DIA. STANDOFFS.
4) PINS 4 AND 8 ARE 0.080" (2.03mm) DIA. WITH 0.125"
(3.18mm) DIA STANDOFFS
5) ALL PINS: MATERIAL: COPPER ALLOY
FINISH: MATTE TIN OVER NICKEL PLATE
6) WEIGHT: 4.7 oz (134 g)
7) ALL DIMENSIONS IN INCHES (mm)
TOLERANCES: X.XXIN +/-0.02 (X.Xmm +/-0.5mm)
X.XXXIN +/-0.010 (X.XXmm +/-0.25mm)
Product # MCOTS-C-48-24-HP
2
Phone 1-888-567-9596
www.synqor.com
Pin
1
2
Name
Vin(+)
ON/OFF
3
4
5
6
7
8
IN RTN
OUT RTN
SENSE(–)
TRIM
SENSE(+)
Vout(+)
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 sense1
Output voltage trim2
Positive remote sense3
Positive output voltage
Notes:
1)
SENSE(–) should be connected to Vout(–) either remotely or
at the converter.
2)
Leave TRIM pin open for nominal output voltage.
3)
SENSE(+) should be connected to Vout(+) either remotely or
at the converter.
Doc.# 005-0005424
Rev. E
09/02/14
Page 12
MCOTS-C-48-24-HP
Output: 24V
Current: 10.5A
Flanged Mechanical Drawing
SEATING
PLANE
HEIGHT
0.495±0.025
[ 12.57±0.63 ]
3.150 [80.01]
2.950 [74.93]
2.486 [63.14]
PIN
EXTENSION
0.180
[4.57]
1.000 [25.40]
0.700 [17.78]
4
5
6
8
7
TOP VIEW
1.300
[33.02]
0.010 [0.25]
1.900
[48.26]
1.866
[47.40]
0.31
[7.9]
2.386
[60.60]
2
3
1
1
0.775±0.020
[ 19.69±0.50 ]
.130 [3.30]
SEE NOTE 1
(6 PLCS)
FLANGE
THICKNESS
0.125
[3.18]
NOTES
1.400 [35.56]
PIN DESIGNATIONS
1) APPLIED TORQUE PER M3 OR 4-40 SCREW 4in-lb
RECOMMENDED (5in-lb LIMIT)
2) BASEPLATE FLATNESS TOLERANCE IS 0.010"
(.25mm) TIR FOR SURFACE.
3) PINS 1-3 AND 5-7 ARE 0.040" (1.02mm) DIA. WITH
0.080" (2.03mm) DIA.
4) PINS 4 AND 8 ARE 0.080" (2.03mm) DIA. WITH 0.125"
(3.18mm) DIA STANDOFFS
5) ALL PINS: MATERIAL: COPPER ALLOY
FINISH: MATTE TIN OVER NICKEL PLATE
6) WEIGHT: 4.9 oz. (140 g)
7) ALL DIMENSIONS IN INCHES (mm)
TOLERANCES: X.XXIN +/-0.02 (X.Xmm +/-0.5mm)
X.XXXIN +/-0.010 (X.XXmm +/-0.25mm)
Product # MCOTS-C-48-24-HP
0.400 [10.16]
Phone 1-888-567-9596
Pin
1
2
Name
Vin(+)
ON/OFF
3
4
5
6
7
8
IN RTN
OUT RTN
SENSE(–)
TRIM
SENSE(+)
Vout(+)
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 sense1
Output voltage trim2
Positive remote sense3
Positive output voltage
Notes:
1)
SENSE(–) should be connected to Vout(–) either remotely or
at the converter.
2)
Leave TRIM pin open for nominal output voltage.
3)
SENSE(+) should be connected to Vout(+) either remotely or
at the converter.
www.synqor.com
Doc.# 005-0005424
Rev. E
09/02/14
Page 13
MCOTS-C-48-24-HP
Output: 24V
Current: 10.5A
Qualifications & Screening
Mil-COTS Qualification
Test Name
# Tested Consistent with MIL(# Failed)
STD-883F Method
Details
Life Testing
Shock-Vibration
Visual, mechanical and electrical testing before, during
and after 1000 hour burn-in @ full load
Visual, mechanical and electrical testing before, during
and after shock and vibration tests
Humidity
+85˚C, 95% RH, 1000 hours, 2 minutes on / 6 hours off
Temperature
Cycling
500 cycles of -55˚C to +100˚C
(30 minute dwell at each temperature)
Solderability
15 pins
DMT
-65˚C to +110˚C across full line and load specifications
in 5˚C steps
Altitude
70,000 feet (21 km), see Note
15
(0)
5
(0)
8
(0)
10
(0)
15
(0)
7
(0)
2
(0)
Consistent with MIL-STD883F Method 5005
Method 1005.8
MIL-STD-202,
Methods 201A & 213B
Method 1004.7
Method 1010.8
Condition A
Method 2003
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
Process Description
S-Grade
M-Grade
Baseplate Operating Temperature
-55˚C to +100˚C
-55˚C to +100˚C
Storage Temperature
-65˚C to +135˚C
-65˚C to +135˚C
●
●
Pre-Cap Inspection
IPC-610, Class III
Temperature Cycling
Method 1010, Condition B, 10 Cycles
Burn-In
100˚C Baseplate
12 Hours
96 Hours
100%
25˚C
-55˚C, +25˚C, +100˚C
MIL-STD-2008
●
●
Final Electrical Test
Final Visual Inspection
●
Mil-COTS MIL-STD-810G Qualification Testing
MIL-STD-810G Test
Fungus
Altitude
Method
508.6
Description
Table 508.6-I
500.5 - Procedure I
Storage: 70,000ft. / 2 Hr. duration
500.5 - Procedure II
Operating; 70,000ft. / 2 Hr. duration; Ambient Temperature
Rapid Decompression
500.5 - Procedure III
Storage: 8,000ft. to 40,000ft.
Acceleration
513.6 - Procedure II
Operating - 15g's
Salt Fog
509.5
Storage
501.5 - Procedure I
Storage: 135°C / 3 hrs
501.5 - Procedure II
Operating: 100°C / 3 hrs
502.5 - Procedure I
Storage: -65C / 4 hrs
502.5 - Procedure II
Operating: -55C / 3 hrs
Temperature Shock
503.5 - Procedure I - C
Storage: -65C to 135C; 12 cycles
Rain
506.5 - Procedure I
Wind Blown Rain
Immersion
512.5 - Procedure I
Non-Operating
Humidity
507.5 - Procedure II
Aggravated cycle @ 95% RH (Figure 507.5-7 aggravated temp - humidity cycle, 15 cycles)
Random Vibration
514.6 - Procedure I
10-2000 Hz, PSD level of 1.5 g2/Hz(54.6grms), duration = 1 hr/axis
516.6 - Procedure I
20g's peak, 11ms, Functional Shock (Operating no load) (saw tooth)
516.6 - Procedure VI
514.6 - Category 14
510.5 - Procedure I
Bench Handling Shock
Rotary wing aircraft - helicopter, 4hrs/axis, 20g's (sine sweep from 10 - 500HZ)
Blowing Dust
510.5 - Procedure II
Blowing Sand
High Temperature
Low Temperature
Shock
Sinusoidal vibration
Sand and Dust
Product # MCOTS-C-48-24-HP
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005424
Rev. E
09/02/14
Page 14
MCOTS-C-48-24-HP
Output: 24V
Current: 10.5A
Ordering Information
Ordering Information/ Part Numbering
Example MCOTS-C-48-24-HP-N-S
Not all combinations make valid part numbers, please contact SynQor for availability.
Family
MCOTS
Product
Input Voltage
28: 16-40V
48: 34-75V
C: Converter
Output
Voltage
1R8:
3R3:
05:
8R4:
12:
15:
1.8V
3.3V
5.0V
8.4V
12V
15V
19R1: 19.1V
24:
28:
40:
48:
Package
Thermal Design
Screening
Level
HP: Half Brick
Peta
N: Normal Threaded
D: Normal
Non-Threaded
F: Flanged
S: S-Grade
M: M-Grade
24V
28V
40V
48V
Options
[ ]: Standard Feature
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.
Contact SynQor for further information and to order:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # MCOTS-C-48-24-HP
978-849-0600
888-567-9596
978-849-0602
[email protected]
www.synqor.com
155 Swanson Road
Boxborough, MA 01719
USA
Phone 1-888-567-9596
5,999,417
6,222,742
6,545,890
6,577,109
6,594,159
6,731,520
6,894,468
6,896,526
6,927,987
7,050,309
7,072,190
7,085,146
7,119,524
7,269,034
7,272,021
7,272,023
7,558,083
7,564,702
7,765,687
7,787,261
8,023,290
8,149,597
8,493,751
8,644,027
Warranty
SynQor offers a two (2) year limited warranty. Complete warranty
information is listed on our website or is available upon request from
SynQor.
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.
www.synqor.com
Doc.# 005-0005424
Rev. E
09/02/14
Page 15
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