SYNQOR MCOTS-C-28-12-QT

MCOTS-C-28-12-QT
Single Output
Quarter Brick
Military COTS DC/DC Converters
16-50V
12V
10A
Continuous Input
Transient Input
Output
Output
91% @ 5A / 90% @ 10A
Efficiency
a
pu d
bl va
ic n
at ce
io d
n
16-40V
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
Operational Features
Designed and Manufactured in the USA
• High efficiency, 90% at full rated load current
• Operating input voltage range: 16-40 V
• Fixed frequency switching provides predictable EMI
• No minimum load requirement
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 12.7mm)
• Total weight: 3 oz (85 g)
Control Features
Screening/Qualification
• On/Off control referenced to input side
• Remote sense for the output voltage
• Output voltage trim range of -20%, +10%
Safety Features
• 2250 V, 30 MW input-to-output isolation
• Certified 60950-1 requirements for basic insulation (see Standards and Qualifications page)
• CE Marked
• RoHS compliant
Product # MCOTS-C-28-12-QT
• Input under-voltage lockout
• Output current limit and short circuit protection
• Active back bias limit
• Output over-voltage protection
• Thermal shutdown
Phone 1-888-567-9596
• AS9100 and ISO 9100:2000 certified facility
• Qualification consistent with MIL-STD-883
• Avialable with standard or military grade screening
• Pre-cap inspection per IPC-610, Class III
• Temperature cycling per MIL-STD-883, Method 1010,
Condition B, 10 cycles
• Burn-In at 100°C baseplate temperature
• Final visual inspection per MIL-STD-2008
• Full component traceability
www.synqor.com
Doc.# 005-0005277 Rev. 1
06/11/09
Page 1
MCOTS-C-28-12-QT
Output: 12V
Current: 10A
Technical Specification
a
pu d
bl va
ic n
at ce
io d
n
BLOCK DIAGRAM
TYPICAL CONNECTION DIAGRAM
Vin
External
Input
Filter
Vin(+)
Vout(+)
Vsense(+)
Electrolytic
ON/OFF
Trim
Vsense(_)
Vin(_)
Product # MCOTS-C-28-12-QT
Phone 1-888-567-9596
www.synqor.com
Rtrim-up
or
Rtrim-down
Cload
Iload
Vout(_)
Doc.# 005-0005277 Rev. 1
06/11/09
Page 2
MCOTS-C-28-12-QT
Output: 12V
Current: 10A
Technical Specification
MCOTS-C-28-12-QT ELECTRICAL CHARACTERISTICS
Tb = 25 °C, Vin = 28Vdc 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
a
pu d
bl va
ic n
at ce
io d
n
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage
Input to Output
Input to Base-Plate
Output to Base-Plate
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin
INPUT CHARACTERISTICS
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Recommended External Input Capacitance
Input Filter Component Values (L\C)
Maximum Input Current
No-Load Input Current
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
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 Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
DYNAMIC CHARACTERISTICS
Output Voltage Deviation Load Transient
For a Positive Step Change in Load Current
For a Negative Step Change in Load Current
Settling Time (either case)
Output Voltage Deviation Line Transient
For a Positive Step Change in Line Current
For a Negative Step Change in Line Current
Settling Time (either case)
Turn-On Transient
Turn-On Time
Start-Up Inhibit Time
Output Voltage Overshoot
EFFICIENCY
100% Load
50% Load
Product # MCOTS-C-28-12-QT
-55
-65
-2
60
40
50
V
V
V
2250
2250
2250
100
135
18
V dc
V dc
V dc
°C
°C
V
16
28
40
V
15.1
14.2
15.4
14.5
0.9
100
1.0\6.6
15.7
14.8
TBD
V
V
V
µF
µH\µF
A
mA
mA
V
mA
A
12
12.12
V
±0.1
±0.1
±0.3
±0.3
180
12.30
%
%
mV
V
50
10
10
13.0
mV
mV
A
A
V
A
mA
µF
%
%
V
130
2
0.4
425
11.88
-180
11.70
0
0
11.0
25
6
12.0
5
0.45
TBD
-20
14.04
200
Phone 1-888-567-9596
14.64
11.0
160
4
1,500
10
10
15.24
Continuous
Continuous
1 s transient, square wave
Baseplate temperature
Baseplate temperature
50V transient for 1 s
Typical ESR 0.1-0.2 Ω
Internal values; see Figure E
Vin min; trim up; in current limit
See Figure 6
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)
Across Pins 8&4; Common Figures 3-5; see Note 2
Across Pins 8&4
Over full temp range
500
500
100
mV
mV
µs
Total Iout step = 5A -> 10A
500
500
100
mV
mV
µs
Vin step = 16V -> 50V,
9
230
0
250
90
91
www.synqor.com
ms
ms
%
Full load, Vout=90% nom.
-40 °C to +125 °C; Figure E
Maximum Output Capacitance
%
%
See Figure 1 for efficiency curve
See Figure 1 for efficiency curve
Doc.# 005-0005277 Rev. 1
06/11/09
Page 3
MCOTS-C-28-12-QT
Output: 12V
Current: 10A
Technical Specification
MCOTS-C-28-12-QT ELECTRICAL CHARACTERISTICS
Tb = 25 °C, Vin = 28Vdc 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.
a
pu d
bl va
ic n
at ce
io d
n
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
See Absolute Maximum Ratings
Isolation Resistance
30
MΩ
Isolation Capacitance (input to output)
1000
pF
See Note 2
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
125
°C
Package rated to 150 °C
Board Temperature
125
°C
UL rated max operating temp 130 °C
Transformer Temperature
125
°C
Maximum Baseplate Temperature, Tb
100
°C
FEATURE CHARACTERISTICS
Switching Frequency
230
250
270
kHz For both input and isolation stage
ON/OFF Control
Off-State Voltage
2.4
18
V
On-State Voltage
-2
0.8
ON/OFF Control
Application notes Figures A & B
Pull-Up Voltage
5
V
Pull-Up Resistance
50
kΩ
Over-Temperature Shutdown OTP Trip Point
125
°C
Average PCB Temperature
Over-Temperature Shutdown Restart Hysteresis
10
°C
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia) TR-NWT-000332
TBD
106 Hrs. 80% load, 200LFM, 40 °C Ta
Calculated MTBF (MIL-217) MIL-HDBK-217F
TBD
106 Hrs. 80% load, 200LFM, 40 °C Ta
Field Demonstrated MTBF
106 Hrs. See our website for details
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: Higher values of isolation capacitance can be added external to the module.
Product # MCOTS-C-28-12-QT
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005277 Rev. 1
06/11/09
Page 4
MCOTS-C-28-12-QT
Output: 12V
Current: 10A
Technical Specification
95
18
16
90
Power Dissipation (W)
14
12
a
pu d
bl va
ic n
at ce
io d
n
Efficiency (%)
85
80
75
70
8
6
4
40 Vin
28 Vin
16 Vin
65
10
40 Vin
28 Vin
2
60
16 Vin
0
0
2
4
6
8
10
0
2
4
Load Current (A)
Figure 1: Efficiency at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
8
10
Figure 2: Power dissipation at nominal output voltage vs. load current
for minimum, nominal, and maximum input voltage at 25°C.
12
12
10
10
8
8
Iout (A)
Iout (A)
6
Load Current (A)
6
4
6
4
400 LFM (2.0 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
2
300 LFM (1.5 m/s)
2
200 LFM (1.0 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
100 LFM (0.5 m/s)
0
0
0
25
40
55
70
85
0
Ambient Air Temperature (°C)
25
40
55
70
85
Ambient Air Temperature (°C)
Figure 3: Encased converter (without heatsink) max. output power derating vs.
ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows
across the converter from pin 3 to pin 1 (nominal input voltage).
Figure 4: Encased converter (with 1/4” heatsink) max. output power derating vs.
ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows
across the converter from pin 3 to pin 1 (nominal input voltage).
Figure 5: 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 (500mV/div), Ch 2: Iout (5A/div).
Figure 6: Output voltage response to step-change in input voltage
(250 V/ms). Load cap: 100 µF, electrolytic output capacitance. Ch 1: Vout
(500mV/div), Ch 2: Vin (20V/div).
Product # MCOTS-C-28-12-QT
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005277 Rev. 1
06/11/09
Page 5
MCOTS-C-28-12-QT
Output: 12V
Current: 10A
Technical Specification
120
Typical Current Limit Inception Point
Nominal Vout
Output Voltage (%)
a
pu d
bl va
ic n
at ce
io d
n
100
80
Typical Output Voltage at Shutdown
60
40
Vin min
Vin nom
20
Vin max
0
5.00
0
10
20
30
40
50
60
70
80
90 100 110 120 130 140 150
Load Current (% )
Figure 7: Typical startup waveform. Input voltage pre-applied, ON/OFF
Pin on Ch 2.
Figure 8: Output voltage vs. load current showing typical current limit
curves and converter shutdown points.
100,000.0
Trim Resistance (kOhms)
Trim Up
Trim Down
10,000.0
1,000.0
100.0
10.0
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20
Figure 9: Trim graph for trim-up, trim down.
Product # MCOTS-C-28-12-QT
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005277 Rev. 1
06/11/09
Page 6
MCOTS-C-28-12-QT
Output: 12V
Current: 10A
Technical Specification
MIL COTS Qualification
Consistent with
MIL-STD-883F
Method
Details
#Tested
(# Failed)
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
8
(0)
Method 1004.7
Temperature Cycling
500 cycles of -40˚C to +100˚C (30
minute dwell at each temperature
10
(0)
Method 1010.8
Solderability
15 pins
15
(0)
Method 2003
DMT
-65˚C to +110˚C across full lne and
load specificatonsin 5˚C steps
7
(0)
Consistent with MILSTD-883F Method
5005
a
pu d
bl va
ic n
at ce
io d
n
Test Name
Method 1005.8
MIL-STD-202, Method 1
Condition A
MIL COTS Screening
Standard
Military
(MIL 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
●
●
Screening
Pre-Cap inspection
Temperature Cyclling
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-28-12-QT
●
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005277 Rev. 1
06/11/09
Page 7
MCOTS-C-28-12-QT
Output: 12V
Current: 10A
Technical Specification
CONTROLFEATURES
This MIL-COTS converter series uses a two-stage power
conversion topology. The first stage is a buck-converter that
keepstheoutputvoltageconstantovervariationsinline,load,
and temperature. The second stage uses a transformer to
providethefunctionsofinput/outputisolationandvoltagestepuporstep-downtoachievetheoutputvoltagerequired.
REMOTE ON/OFF (Pin 2):TheON/OFFinput,Pin2,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(-).
TheON/OFFsignalisactivelow(meaningthatalowturnsthe
converteron).FigureAdetailsfourpossiblecircuitsfordriving
theON/OFFpin.FigureBisadetailedlookoftheinternalON/
OFFcircuitry.
a
pu d
bl va
ic n
at ce
io d
n
BASICOPERATIONANDFEATURES
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
highefficiency,evenatverylowoutputvoltagesandveryhigh
outputcurrents.
Theseconvertersareofferedtotallyencasedtowithstandharsh
environmentsandthermallydemandingapplications.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
extremesituations.
Thisseriesofconvertersusetheindustrystandardfootprintand
pin-outconfiguration.
REMOTE SENSE(+) (Pins 7 and 5): The SENSE(+) inputs
correctforvoltagedropsalongtheconductorsthatconnectthe
converter’soutputpinstotheload.
Pin 7 should be connected to Vout(+) and Pin 5 should be
connectedtoVout(-)atthepointontheboardwhereregulation
is desired. A remote connection at the load can adjust for a
voltage drop only as large as that specified in this datasheet,
thatis
[Vout(+)-Vout(-)]– [Vsense(+)- Vsense(-)]<
SenseRange%xVout
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
thanitsspecifiedvalue.
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(pins7and5).Therefore,theresistivedropontheboard
should be small enough so that output OVP does not trigger,
evenduringloadtransients.
ON/OFF
ON/OFF
Vin(_)
Vin(_)
RemoteEnableCircuit
5V
NegativeLogic
(PermanentlyEnabled)
5V
ON/OFF
ON/OFF
ON/OFF
Vin(_)
Vin(_)
100pF
Vin(_)
DirectLogicDrive
Figure A: Various circuits for driving the ON/OFF pin.
Product # MCOTS-C-28-12-QT
50k
TTL
TTL/
CMOS
OpenCollectorEnableCircuit
50k
Phone 1-888-567-9596
Figure B: Internal ON/OFF pin circuitry
www.synqor.com
Doc.# 005-0005277 Rev. 1
06/11/09
Page 8
MCOTS-C-28-12-QT
Output: 12V
Current: 10A
Technical Specification
OUTPUT VOLTAGE TRIM (Pin 6):TheTRIMinputpermitsthe
usertoadjusttheoutputvoltageacrossthesenseleadsupor
downaccordingtothetrimrangespecifications.
Input Under-Voltage Lockout: The converter is designed
toturnoffwhentheinputvoltageistoolow,helpingavoidan
input system instability problem, described in more detail in
the application note titled “Input System Instability” on our
website.Thelockoutcircuitryisacomparatorwithdchysteresis.
Whentheinputvoltageisrising,itmustexceedthetypicalTurnOn 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
Thresholdvaluebeforetheconverterwillturnoff.
a
pu d
bl va
ic n
at ce
io d
n
To decrease the output voltage, the user should connect a
resistorbetweenPin6andPin5(SENSE(-)input).Foradesired
decreaseofthenominaloutputvoltage,thevalueoftheresistor
shouldbe
PROTECTIONFEATURES
Rtrim-down=
( )
511
-10.22 (kW)
∆%
where
∆% =
Vnominal–Vdesired x100%
Vnominal
To increase the output voltage, the user should connect a
resistorbetweenPin6andPin7(SENSE(+)input).Foradesired
increaseofthenominaloutputvoltage,thevalueoftheresistor
shouldbe
Rtrim-up =
where
(
5.11VOUTx(100+∆%) 1.225∆%
_ 511 _ 10.22
∆%
)
(kW)
Vout=NominalOutputVoltage
Trim graphs show the relationship between the trim resistor
valueandRtrim-upandRtrim-down,showingthetotalrangethe
outputvoltagecanbetrimmedupordown.
Note:theTRIMfeaturedoesnotaffectthevoltageatwhichthe
outputover-voltageprotectioncircuitistriggered.Trimmingthe
output voltage too high may cause the over-voltage protection
circuittoengage,particularlyduringtransients.
ItisnotnecessaryfortheusertoaddcapacitanceattheTrim
pin.Thenodeisinternallybypassedtoeliminatenoise.
Total DC Variation of VOUT: For the converter to meet its full
specifications, the maximum variation of the dc value of VOUT,
duetobothtrimmingandremoteloadvoltagedrops,shouldnot
begreaterthanthatspecifiedfortheoutputvoltagetrimrange.
Product # MCOTS-C-28-12-QT
Phone 1-888-567-9596
Output Current Limit: The maximum current limit remains
constant as the output voltage drops. However, once the
impedanceoftheloadacrosstheoutputissmallenoughtomake
theoutputvoltagedropbelowthespecifiedOutputDCCurrentLimitShutdownVoltage,theconverterturnsoff.
Theconverterthenentersa“hiccupmode”whereitrepeatedly
turnsonandoffata5Hz(nominal)frequencywitha5%duty
cycleuntiltheshortcircuitconditionisremoved.Thisprevents
excessiveheatingoftheconverterortheloadboard.
Output Over-Voltage Limit:Ifthevoltageacrosstheoutput
pinsexceedstheOutputOver-VoltageProtectionthreshold,the
converterwillimmediatelystopswitching.Thispreventsdamage
totheloadcircuitdueto1)excessiveseriesresistanceinoutput
current path from converter output pins to sense point, 2) a
releaseofashort-circuitcondition,or3)areleaseofacurrent
limit condition. Load capacitance determines exactly how high
theoutputvoltagewillriseinresponsetotheseconditions.After
200mstheconverterwillautomaticallyrestart.
Over-Temperature Shutdown: A temperature sensor on
the converter senses the average temperature of the module.
Thethermalshutdowncircuitisdesignedtoturntheconverter
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
fallsbytheamountoftheOver-TemperatureShutdownRestart
Hysteresisvalue.
www.synqor.com
Doc.# 005-0005277 Rev. 1
06/11/09
Page 9
MCOTS-C-28-12-QT
Output: 12V
Current: 10A
Technical Specification
APPLICATIONCONSIDERATIONS
a
pu d
bl va
ic n
at ce
io d
n
Input System Instability: This condition can occur because Application Circuits:FigureCprovidesatypicalcircuitdiagram
any dc-dc converter appears incrementally as a negative whichdetailstheinputfilteringandvoltagetrimming.
resistanceload.Adetailedapplicationnotetitled“InputSystem
Instability”isavailableontheSynQorwebsitewhichprovides
anunderstandingofwhythisinstabilityarises,andshowsthe
preferredsolutionforcorrectingit.
Vin(+)
Electrolytic
Capacitor
External
Input
Filter
Vin
Vout(+)
Vsense(+)
ON/OFF
Trim
Vsense(_)
Vin(_)
Rtrim-up
or
Rtrim-down
Cload
Iload
Vout(_)
Figure C: Typical application circuit (negative logic unit, permanently enabled).
Input Filtering and External Capacitance:FigureDprovides
adiagramshowingtheinternalinputfiltercomponents.Thisfilter
dramaticallyreducesinputterminalripplecurrent,whichotherwise
couldexceedtheratingofanexternalelectrolyticinputcapacitor.
The recommended external input capacitance is specified in the
Input Characteristics section on the Electrical Characteristics
page.Moredetailedinformationisavailableintheapplicationnote
titled“EMICharacteristics”ontheSynQorwebsite.
Lin
Vin(+)
C2
C1
Regulation
Stage
Isolation
Stage
Vin(_)
Figure D: Internal Input Filter Diagram (component values listed on the specifications page).
Product # MCOTS-C-28-12-QT
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005277 Rev. 1
06/11/09
Page 10
MCOTS-C-28-12-QT
Output: 12V
Current: 10A
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-OnTime.
Thermal Considerations:Themaximumoperatingbase-plate
temperature,TB,is100ºC.Aslongastheuser’sthermalsystem
keepsTB<100ºC,theconvertercandeliveritsfullratedpower.
a
pu d
bl va
ic n
at ce
io d
n
Startup Inhibit Period:TheStartupInhibitPeriodensuresthat
theconverterwillremainoffforapproximately200mswhenitis
shutdownforanyreason.Whenanoutputshortispresent,this
generates a 5 Hz “hiccup mode,” which prevents the converter
fromoverheating.Inall,therearesevenwaysthattheconverter
canbeshutdown,initiatingaStartupInhibitPeriod:
• InputUnder-VoltageLockout
Apowerderatingcurvecanbecalculatedforanyheatsinkthatis
attached to the base-plate of the converter. It is only necessary
todeterminethethermalresistance,RTHBA,ofthechosenheatsink
between the base-plate and the ambient air for a given airflow
rate. This information is usually available from the heatsink
vendor.Thefollowingformulacanthebeusedtodeterminethe
maximumpowertheconvertercandissipateforagiventhermal
conditionifitsbase-plateistobenohigherthan100ºC.
• InputOver-VoltageShutdown
• OutputOver-VoltageProtection
• OverTemperatureShutdown
• CurrentLimit
• ShortCircuitProtection
• TurnedoffbytheON/OFFinput
FigureEshowsthreeturn-onscenarios,whereaStartupInhibit
100ºC-TA
max
Periodisinitiatedatt0,t1,andt2:
Pdiss =
RTHBA
Beforetimet0,whentheinputvoltageisbelowtheUVLthreshold,
theunitisdisabledbytheInputUnder-VoltageLockoutfeature. Thisvalueofpowerdissipationcanthenbeusedinconjunction
WhentheinputvoltagerisesabovetheUVLthreshold,theInput withthedatashowninFigure2todeterminethemaximumload
Under-VoltageLockoutisreleased,andaStartupInhibitPeriodis current (and power) that the converter can deliver in the given
initiated.Attheendofthisdelay,theON/OFFpinisevaluated, thermalcondition.
andsinceitisactive,theunitturnson.
Forconvenience,powerderatingcurvesforanencasedconverter
Attimet1,theunitisdisabledbytheON/OFFpin,anditcannot without a heatsink and with a typical heatsink are provided for
eachoutputvoltage.
beenabledagainuntiltheStartupInhibitPeriodhaselapsed.
Vin
Under-Voltage
LockoutTurnOnThreshold
ON/OFF
(neglogic)
ON
OFF ON
Vout
OFF
ON
9ms (typical
turnontime)
200ms
(typicalstart-up
inhibitperiod)
t1
t0
200ms
200ms
t2
t
Figure E: Startup Inhibit Period (turn-on time not to scale)
Product # MCOTS-C-28-12-QT
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005277 Rev. 1
06/11/09
Page 11
MCOTS-C-28-12-QT
Output: 12V
Current: 10A
Technical Specification
Mechanical Drawing
Top View
Side View
1.536±0.020(39.01±0.5)
0.600(15.24)
0.500±0.025
(12.7±0.63)
OverallHeight
0.450(11.43)
a
pu d
bl va
ic n
at ce
io d
n
0.300(7.62)
0.18±0.010
(4.57±0.25)
0.253±0.020
(6.4±0.5)
0.150(3.81)
0.263±0.020
(6.68±0.5)
8 7 6 5 4
2.386
±0.020
(60.6±0.5)
2.00
(50.8)
1.86
(47.2)
M3
Threaded
Inserts
4Places
SeeNotes
1
2
3
0.183±.020
(4.65)±0.5
0.468±0.020
(11.89±0.5)
0.300(7.62)
0.600(15.24)
1.030(26.16)
PIN DESIGNATIONS
NOTES
1) M3screwsusedtoboltunit’sbaseplatetoothersurfaces(suchasa
heatsink)mustnotexceed0.100"(2.54mm)depthbelowthesurface
ofthebaseplate.
2) Appliedtorqueperscrewshouldnotexceed6in-lb.(0.7Nm).
Pin
Name
Function
1
Vin(+)
Positiveinputvoltage
2
ON/OFF
3
Vin(–)
4
Vout(–)
5
SENSE(–)
6
TRIM
7
SENSE(+)
Positiveremotesense3
8
Vout(+)
Positiveoutputvoltage
3) Baseplateflatnesstoleranceis0.004"(.10mm)TIRforsurface.
4) Pins1-3,5-7are0.040”(1.02mm)diameter,with0.080”(2.03mm)
diameterstandoffshoulders.
5) Pins4and8are0.062”(1.57mm)diameterwith0.100"(2.54mm)
diameterstandoffshoulders.
6) AllPins:Material-CopperAlloy-Finish(RoHS6/6)-MatteTinover
Nickelplate
7) Undimensionedcomponentsareshownforvisualreferenceonly.
8) Weight:3.02oz.(85.7g)typical
TTLinputtoturnconverteron
andoff,referencedtoVin(–),with
internalpullup.
Negativeinputvoltage
Negativeoutputvoltage
Negativeremotesense1
Outputvoltagetrim2
Notes:
9) Alldimensionsininches(mm)
Tolerances:x.xx+/-0.02in.(x.x+/-0.5mm)
x.xxx+/-0.010in.(x.xx+/-0.25mm)
1)
SENSE(–)shouldbeconnectedtoVout(–)eitherremotelyor
attheconverter.
2)
LeaveTRIMpinopenfornominaloutputvoltage.
10) Workmanship:MeetsorexceedsIPC-A-610CClassII
3)
SENSE(+)shouldbeconnectedtoVout(+)eitherremotelyor
attheconverter.
11) Recommendedpinlengthis0.03”(0.76mm)greaterthanthePCB
thickness.
Product # MCOTS-C-28-12-QT
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005277 Rev. 1
06/11/09
Page 12
MCOTS-C-28-12-QT
Output: 12V
Current: 10A
Technical Specification
Ordering Information/ Part Numbering
Input
Voltage
Product
Output Voltage
1R2: 1.2V
1R5: 1.5V
1R8: 1.8V
2R5: 2.5V
3R3: 3.3V
05: 5V
07: 7V
12: 12V
Package
Heatsink
Option
Screening
Level
a
pu d
bl va
ic n
at ce
io d
n
Family
MCOTS
28: 16-40V
48: 34-75V
270: 155-400V
C: Converter
F: Filter
15: 15V
24: 24V
28: 28V
40: 40V
48: 48V
P: Passive
T: Active
FT: Full Brick
HP: Half Brick Peta
HZ: Half Brick Zeta
QT: Quarter Brick
EG: Eighth Brick
SM: Sixteenth Brick
N: Normal
F: Flanged
S: Standard
M: M-Grade
Example MCOTS-C-28-12-QT-N-S
Application Notes
A variety of application notes and technical white papers can
be downloaded in pdf format from our website.
RoHS Compliance: The EU led RoHS (Restriction of Hazardous
Substances) Directive bans the use of Lead, Cadmium, Hexavalent
Chromium, Mercury, Polybrominated Biphenyls (PBB), and
Polybrominated Diphenyl Ether (PBDE) in Electrical and Electronic
Equipment. This SynQor product is 6/6 RoHS compliant. For
more information please refer to SynQor’s RoHS addendum
available at our RoHS Compliance / Lead Free Initiative web page
or e-mail us at [email protected]
PATENTS
SynQor holds the following patents, one or more of which might apply to this product:
5,999,417
6,594,159
6,927,987
7,119,524
6,222,742
6,731,520
7,050,309
7,269,034
6,545,890
6,894,468
7,072,190
7,272,021
6,577,109
6,896,526
7,085,146
7,272,023
Contact SynQor for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # MCOTS-C-28-12-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.# 005-0005277 Rev. 1
06/11/09
Page 13