Technical Specification

MCOTS-C-28V-48-QT
Single Output
Quarter-brick
MILITARY COTS DC/DC CONVERTER
9-40V
Continuous Input
9-55V
Transient Input
48V
Output
1.8A
Output
88% @ 0.9A / 86% @ 1.8A
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
M
D CO
C
28 /D TSV C CIN CO 28
48 N VV VE 48
O R -Q
U TE T
T @ R N
-M
1.
8A
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.
Designed and Manufactured in the USA
Operational Features
•
•
•
•
High efficiency, 86% at full rated load current
Operating input voltage range: 9-40 V
Fixed frequency switching provides predictable EMI
No minimum load requirement
Safety Features
• 2250V, 30 MΩ input-to-output isolation
• Certified 60950-1 requirement for basic insulation
(see Standards and Qualifications page)
Protection Features
Mechanical Features
• Industry standard quarter-brick pin-out configuration
• Size:
1.54” x 2.39” x 0.50”
(39.0 x 60.6 x 12.7 mm)
• Total weight: 3.02 oz. (85.7 g)
• Flanged baseplate version available
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-28V-48-QT
Phone 1-888-567-9596
•
•
•
•
•
Input under-voltage lockout
Output current limit and short circuit protection
Active back bias limit
Output over-voltage protection
Thermal shutdown
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
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Doc.# 005-0006017 Rev. A
04/26/11
Page 1
MCOTS-C-28V-48-QT
Output: 48V
Current: 1.8A
Technical Specification
BLOCK DIAGRAM
REGULATION STAGE
1
POSITIVE
INPUT
ISOLATION STAGE
CURRENT
SENSE
T1
T2
8
T1
T2
POSITIVE
OUTPUT
3
4
INPUT
RETURN
ISOLATION BARRIER
GATE DRIVERS
CURRENT
LIMIT
UVLO
OVSD
2
ON/OFF
OUTPUT
RETURN
GATE CONTROL
OPTO-ISOLATION
PRIMARY
CONTROL
6
SECONDARY
CONTROL
TRIM
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-28V-48-QT
Phone 1-888-567-9596
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Rtrim-up
or
Rtrim-down
Cload
Iload
Vout(_)
Doc.# 005-0006017 Rev. A
04/26/11
Page 2
MCOTS-C-28V-48-QT
Output: 48V
Current: 1.8A
Technical Specification
MCOTS-C-28V-48-QT 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
55
V
Continuous
Operating
40
V
Continuous
Operating Transient Protection
55
V
1 s transient, square wave
Isolation Voltage
Input to Output
2250
V dc
Input to Base-Plate
2250
V dc
Output to Base-Plate
2250
V dc
Operating Temperature
-55
100
°C
Baseplate temperature
Storage Temperature
-65
135
°C
Voltage at ON/OFF input pin
-2
18
V
INPUT CHARACTERISTICS
Operating Input Voltage Range
9
28
40
V
55V transient for 1 s
Input Under-Voltage Lockout
Turn-On Voltage Threshold
9.0
9.5
10.0
V
Turn-Off Voltage Threshold
8.1
8.5
8.9
V
Lockout Voltage Hysteresis
1.0
V
µF
Recommended External Input Capacitance
100
Typical ESR 0.1-0.2 Ω
Input Filter Component Values (L\C)
0.47\6.6
µH\µF
Internal values; see Figure E
Maximum Input Current
14.7
A
Vin min; trim up; in current limit
No-Load Input Current
100
130
mA
Disabled Input Current
3
5
mA
Response to Input Transient
0.52
V
See Figure 6
Input Terminal Ripple Current
150
mA
RMS
Recommended Input Fuse
20
A
Fast acting external fuse recommended
OUTPUT CHARACTERISTICS
Output Voltage Set Point
47.520
48.0
48.480
V
Output Voltage Regulation
Over Line
±0.1
±0.3
%
Over Load
±0.1
±0.3
%
Over Temperature
-720
720
mV
Total Output Voltage Range
46.800
49.200
V
Over sample, line, load, temperature & life
Output Voltage Ripple and Noise
20 MHz bandwidth; see Note 1
Peak-to-Peak
60
120
mV
Full load
RMS
10
20
mV
Full load
Operating Output Current Range
0
1.8
A
Subject to thermal derating
Output DC Current-Limit Inception
2.0
2.2
2.3
A
Output voltage 10% Low
Output DC Current-Limit Shutdown Voltage
21
V
Back-Drive Current Limit while Enabled
0.1
A
Negative current drawn from output
Back-Drive Current Limit while Disabled
10
mA
Negative current drawn from output
Maximum Output Capacitance
100
µF
Vout nominal at full load (resistive load)
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs)
1440
mV
50% to 75% to 50% Iout max
Settling Time
2000
µs
To within 1% Vout nom
Output Voltage Trim Range
-15
10
%
Across Pins 8&4; Figure C; see Note 2
Output Voltage Remote Sense Range
10
%
Across Pins 8&4
Output Over-Voltage Protection
56.2
58.6
61.0
V
Over full temp range
EFFICIENCY
100% Load
86
%
See Figure 1 for efficiency curve
50% Load
88
%
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: [email protected])
Note 2: Trim-up range is limited below 10% at low line and full load; and Trim-dow requires a 1% min. Load.
Product # MCOTS-C-28V-48-QT
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006017 Rev. A
04/26/11
Page 3
MCOTS-C-28V-48-QT
Output: 48V
Current: 1.8A
Technical Specification
MCOTS-C-28V-48-QT 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.
DYNAMIC CHARACTERISTICS
Turn-On Transient
Turn-On Time
9
Start-Up Inhibit Time
200
230
250
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
260
275
290
ON/OFF Control
Off-State Voltage
2.4
18
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
3.4
Calculated MTBF per MIL-HDBK-217F
0.58
Note 1: Higher values of isolation capacitance can be added external to the module.
Note 2: Higher values of isolation capacitance can be added external to the module.
Units
ms
ms
%
Notes & Conditions
Full load, Vout=90% nom.
See 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
For both input and isolation stage
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 60950-1:2007
Basic Insulation
CAN/CSA-C22.2 No. 60950-1:2007
EN60950-1:2006/A11:2009/A1:2010
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-28V-48-QT
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006017 Rev. A
04/26/11
Page 4
MCOTS-C-28V-48-QT
Output: 48V
Current: 1.8A
100
100
95
95
90
90
Efficiency (%)
Efficiency (%)
Technical Specification
85
80
75
70
85
80
75
28 Vin
65
28 Vin
65
40 Vin
40 Vin
60
-55ºC
60
0.0
0.3
0.6
0.9
Load Current (A)
1.2
1.5
1.8
Figure 1: Efficiency at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
16
14
14
12
12
10
8
6
9 Vin
28 Vin
2
0
0.3
0.6
0.9
Load Current (A)
1.2
1.5
10
8
6
4
9 Vin
28 Vin
2
40 Vin
0.0
100ºC
Figure 2: Efficiency at nominal output voltage and 60% rated power vs.
case temperature for minimum, nominal, and maximum input voltage.
16
4
25ºC
Case Temperature (ºC)
Power Dissipation (W)
Power Dissipation (W)
9 Vin
70
9 Vin
1.8
Figure 3: Power dissipation at nominal output voltage vs. load current
for minimum, nominal, and maximum input voltage at TCASE =25°C.
0
-55ºC
40 Vin
25ºC
100ºC
Case Temperature (ºC)
Figure 4: Power dissipation at nominal output voltage and 60% rated
power vs. case temperature for minimum, nominal, and maximum input
voltage.
2.0
1.8
1.6
Iout (A)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
50
60
70
80
90
100
110
Base Plate Temperature (°C)
Figure 5: Maximum output current vs. base plate temperature (nominal input
voltage).
Product # MCOTS-C-28V-48-QT
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Figure 6: Output voltage vs. load current showing typical current limit
curves. See Current Limit section in the Application Notes.
www.synqor.com
Doc.# 005-0006017 Rev. A
04/26/11
Page 5
MCOTS-C-28V-48-QT
Output: 48V
Current: 1.8A
Technical Specification
Figure 7: Typical startup waveform. Input voltage pre-applied, ON/OFF Pin on
Ch 2.
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 2: Vin
(20V/div).
Figure 9: Input terminal current ripple, iC, at full rated output current and
nominal input voltage with SynQor MCOTS filter module (1 A/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 (2 V/div), Ch 2: Iout (1A/div).
Figure 12: Output voltage response to step-change in input voltage (250V/ms).
Load cap: 100 µF electrolytic output capacitance. Ch 1: Vout (500mV/div), Ch
2: Vin (20V/div).
Product # MCOTS-C-28V-48-QT
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006017 Rev. A
04/26/11
Page 6
MCOTS-C-28V-48-QT
Output: 48V
Current: 1.8A
Technical Specification
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.
Figure 15: Magnitude of incremental reverse transmission (RT = iin/
iout) for minimum, nominal, and maximum input voltage at full rated
power.
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
100 µF,
0.2Ω ESR
electrolytic capacitor
DC/DC
Converter
VOUT
15 µF,
300mΩ 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-28V-48-QT
Phone 1-888-567-9596
Figure 18: Load current (1A/div) as a function of time (2ms/div and 50ms/div)
when the converter attempts to turn on into a 10 mΩ short circuit.
www.synqor.com
Doc.# 005-0006017 Rev. A
04/26/11
Page 7
MCOTS-C-28V-48-QT
Output: 48V
Current: 1.8A
Technical Specification
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(_)
Remote Enable Circuit
5V
Negative Logic
(Permanently
Enabled)
5V
ON/OFF
50k
ON/OFF
TTL/
CMOS
50k
TTL
ON/OFF
100pF
OPEN
Vin(_)
Vin(_)
Open Collector Enable Circuit
Vin(_)
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Product # MCOTS-C-28V-48-QT
Phone 1-888-567-9596
Figure B: Internal ON/OFF pin circuitry
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Doc.# 005-0006017 Rev. A
04/26/11
Page 8
MCOTS-C-28V-48-QT
Output: 48V
Current: 1.8A
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.
Rtrim-down =
511
(D%
)- 10.22 (kW)
where
Vnominal – Vdesired
Vnominal
D% =
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)
1,000,000
100,000
10,000
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.
1,000
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-28V-48-QT
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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.# 005-0006017 Rev. A
04/26/11
Page 9
MCOTS-C-28V-48-QT
Output: 48V
Current: 1.8A
Technical Specification
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-28V-48-QT
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Doc.# 005-0006017 Rev. A
04/26/11
Page 10
MCOTS-C-28V-48-QT
Output: 48V
Current: 1.8A
Technical Specification
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
9ms
(turn on time)
200ms
(typical start-up
inhibit period)
t1
t0
200ms
200ms
t
t2
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # MCOTS-C-28V-48-QT
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Doc.# 005-0006017 Rev. A
04/26/11
Page 11
MCOTS-C-28V-48-QT
Output: 48V
Current: 1.8A
Technical Specification
Mechanical Drawing – Normal Heatsink Option
1.536 ±0.020 (39.01 ±0.5)
1. 030 (26.16)
0.600 (15.24)
0.450 (11.43)
0.300 (7.62)
0.150 (3.81)
0.253±0.020 (6.4±0.5)
0.500±0.025
(12.7±0.63)
Overall Height
8 7 6 5 4
0.263±0.020
(6.68±0.5)
2.386
± 0.020
(60.6± 0.5)
2.00
(50.8)
0.18±0.010
(4.57±0.25)
Top View
Side View
1.86
(47.2)
1 2
3
M3 Threaded Inserts
4 Places See Notes 1 & 2
0.468±0.020 (11.89±0.5)
0.300 (7.62)
0.183±.020
(4.65)±0.5
0.600 (15.24)
NOTES
PIN DESIGNATIONS
M3 screws used to bolt unit’s baseplate to other surfaces (such as a
heatsink) must not exceed 0.100" (2.54 mm) depth below the
surface of the baseplate.
2)
Applied torque per screw should not exceed 6in-lb (0.7 Nm).
3)
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)
4)
diameter standoff shoulders.
Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100" (2.54 mm)
5)
diameter standoff shoulders.
6)
All Pins: Material – Copper Alloy; Finish – Matte Tin over Nickel plate
7)
Undimensioned components are shown for visual reference only.
8)
Weight: 3.02 oz. (85.7 g) typical
All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
9)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
10) Workmanship: Meets or exceeds IPC-A610 Class II
Recommended pin length is 0.03” (0.76mm) greater than the PCB
thickness.
1)
Product # MCOTS-C-28V-48-QT
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.# 005-0006017 Rev. A
04/26/11
Page 12
MCOTS-C-28V-48-QT
Output: 48V
Current: 1.8A
Technical Specification
Mechanical Drawing – Flanged Heatsink Option
.01 [0.2]
OVERALL HEIGHT
.500 ±.025
[12.7 ±0.63]
2.200 ±.020
[ 55.88 ±0.5 ]
1.536 ±.020
[ 39.01 ±0.5 ]
.18
[ 4.6 ]
SEE NOTE 5
R .065
4
[ 1,65 ]
TOP VIEW
2.386
[ 60.6
6
7
[ 15.2 ]
[ 11.4 ]
.30
[ 7.6 ]
.15
[ 3.8 ]
8
BOTTOM VIEW
2.00
[ 50.8 ]
2.07
[ 52.5 ]
1.66
[ 42.2 ]
5
.60
.45
±.020
±0.5 ]
1.01
[ 25.7 ]
.36
[ 9.1 ]
.183 ±.020
[ 4.65 ±0.5 ]
.02
[ 0.6 ]
3
1
.70
[ 17.8 ]
1.30
[ 33 ]
.800 ±.020
[ 20.32 ±0.5 ]
.13
[ 3.2 ]
NOTES
1
BOTTOMSIDE CLEARANCE
.010 ±.020
[0.51
0.25]
.30
[ 7.6 ]
.60
[ 15.2 ]
PIN DESIGNATIONS
Applied torque per screw should not exceed 5in-lb (3in-lb
recommended).
2)
Baseplate flatness tolerance is 0.01” (.25mm) TIR for surface.
3)
Pins 1-3, 5-7 are 0.040” (1.02mm) diameter, with 0.080” (2.03mm)
diameter standoff shoulders.
4)
Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100" (2.54 mm)
diameter standoff shoulders.
5)
All Pins: Material – Copper Alloy; Finish – Matte Tin over Nickel plate
6)
Weight: 3.12 oz (88.5 g) typical
7)
Undimensioned components are shown for visual reference only.
8)
All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
9)
Workmanship: Meets or exceeds IPC-A610 Class II
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.
1)
Product # MCOTS-C-28V-48-QT
2
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.# 005-0006017 Rev. A
04/26/11
Page 13
MCOTS-C-28V-48-QT
Output: 48V
Current: 1.8A
Technical Specification
Mil-COTS Qualification
Test Name
Details
# Tested
(# Failed)
Consistent with
MIL-STD-883F
Method
Method 1005.8
Life Testing
Visual, mechanical and electrical
testing before, during and after 1000
hour burn-in @ full load
15
(0)
Shock-Vibration
Visual, mechanical and electrical
testing before, during and after shock
and vibration tests
5
(0)
Humidity
+85˚C, 85% 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
8
(0)
10
(0)
15
(0)
7
(0)
2
(0)
Consistent with
MIL-STD-883F
Method 5005
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 Screening
Screening
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
Temperature Cycling
Burn-In
Process Description
IPC-610, Class III
Method 1010, Condition B, 10
Cycles
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
Product # MCOTS-C-28V-48-QT
●
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006017 Rev. A
04/26/11
Page 14
MCOTS-C-28V-48-QT
Output: 48V
Current: 1.8A
Technical Specification
Ordering Information/ Part Numbering
Example MCOTS-C-28V-48-QT-N-S
Not all combinations make valid part numbers, please contact SynQor for availability. See product summary page for details.
Family
Product
Input
Voltage
Output
Voltage
Heatsink
Option
Package
1R8:1.8V
3R3:3.3V
28: 16-40V
05:5V
28V: 9-40V
07:7V
MCOTS C: Converter 28VE: 9-70V
12:12V QT:Quarter Brick
48: 34-75V
15:15V
270: 155-425V 24:24V
28:28V
48:48V
N:Normal
Threaded
F:Flanged
Screening
Level
S: S-Grade
M: M-Grade
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.
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
Contact SynQor for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # MCOTS-C-28V-48-QT
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
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.# 005-0006017 Rev. A
04/26/11
Page 15