MQFL-28V-1R5S-Z-ES [SYNQOR]
DC-DC Regulated Power Supply Module, 1 Output, 60W, Hybrid, MODULE-12;
| 型号： | MQFL-28V-1R5S-Z-ES |
| 厂家： | 
SYNQOR WORLDWIDE HEADQUARTERS |
| 描述： | DC-DC Regulated Power Supply Module, 1 Output, 60W, Hybrid, MODULE-12 |
| 文件： | 总15页 (文件大小：7571K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MQFL-28V-1R5S
Single Output
HigH Reliability DC-DC ConveRteR
16-40V
5.5-50V
1.5V
40A
84% @ 201% @ 40A
Continuous Input
Transient Input
Output
Output
Effic
Full PoweR oPeRation: -55ºC to +125
@
The MilQor series of high-reliability DC-DC converters
brings SynQor’s field proven high-efficiency synchronous
rectifier technology to the Military/Aerospace industry.
TM
SynQor’s innovative QorSeal packaging approach ensures
survivability in the most hostile environments. Compatible
with the industry standard format, these converters operate
at a fixed frequency, have no opto-isolators, and fw
conservative component derating guidelines. They
designed and manufactured to comply with a wide range of
2
A
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R
A
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N
N
I
V
+
N
T
R
N
I
T
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I
B
A
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S
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N
military standards.
Y
S
Meets all -704 and -1275D under-voltage tr
Design Process
D
f
eManufactureD in the usa
MQFL series converters are:
•Designed for reliability per 641-A guidelies
aturor sseMbly
Q
s
eal™
hi-rel
a
•Designed with components dera
— MIL-HDBK-1547A
Features
— NAVSO P-3641A
xed swtching frequency
• pto-isolators
Qualification P
• Parallel operation with current share
Remote sense
Clock synchronization
MQFL severters ard to:
•MIL-STD
• Primary and secondary referenced enable
• Continuous short circuit and overload protection
• Input under-voltage and over-voltage shutdown
— consisteTCA/D0-160E
•SynQor’s Frst Aialificatio
— consistent with MIL-STD-88
•SynQor’s Long-Term StoragSurvivQualtion
•SynQor’s on-ging life test
Specification Compliance
In-Line ManufactuProcess
MQFL series converters (with MQME filter) are designed to meet:
• MIL-HDBK-704-8 (A through F)
• RTCA/DO-160 Section 16, 17, 18
• MIL-STD-1275 (B, D)
• DEF-STAN 61-5 (part 6)/(5, 6)
• MIL-STD-461 (C, D, E, F)
•AS9100 and I1:200ified acility
•Full compoent trbility
•Temperatcling
•Constant accon
•24, 96, 160 hou-in
• RTCA/DO-160(E, F, G) Section 22
•Three level temperscreening
Product# MQFL-28V-1R5S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005187 Rev. 2
08/14/13
Page 1
MQFL-28V-1R5S
Output: 1.5V
Current: 40A
Technical Specification
BLOCK DIAGRAM
REGULATION STAGE
ISTION STA
+Vout
BOOST
7
8
+Vin
CURRENT
SENSE
1
2
CONVERTER
SWITCHES AND
CONTROL
INPUT
RETURN
OUTPUT
RETURN
CASE
GATE DRIVERS
GATRIVERS
3
STABILITY
ENABLE 1
CURRENT
IMIT
ENABLE 2
SHARE
12
11
UVLO
MAGNETI
4
5
6
PRIMARY
CONTROL
NDARY
OL
SYNC OUT
SYNC IN
10 + SENSE
COUPLING
−
SENSE
9
BIAS PO
COTROL
POER
TRANSFORMER
TYPICAL CONCTIOAGRAM
1
2
4
5
6
12
11
10
9
+
ENA 2
SHARE
+SNS
open
means
on
Extal bulk cap
IN RN
TABILITY
ENA 1
+
28 Vdc
_
+
MQFL
RSTABILY
-SNS
Load
_
8
open
means
n
SYNC OUT
SYNC IN
OUT RTN
+VOUT
7
Y
Product# MQFL-28V-1R5S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005187 Rev. 2
08/14/13
Page 2
MQFL-28V-1R5S
Output: 1.5V
Current: 40A
Technical Specification
Under-Voltage Transient Profile
Boost-Converter is armed (or re-armed)
20
when Vin exceeds this value
VARM (~18V)
Boost-Converter Operational Area
15
dV
dt
≤ 0.1V
μ
s
12.5V
VIN
10
5.5V
5
0
0
1.5
27
Time (s)
Under-Voltage Transient Profile owing when the oost-convertr is guarantee operational. Before the boost
converter will operate, it must armed (or re-aed) by makinVIN greater thARM
.
Note:
This Under-Voltage TraProfile is ded to comply (ppropriatmargins) with all initial-engagement surges,
starting or cranking voltagents and under-voltsurgecified in
• MIL-STD-704throu
• RTCA/DO-160
• MIL-STD-1275
• DEF-AN 61-5 (pa(operationans)
Product# MQFL-28V-1R5S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005187 Rev. 2
08/14/13
Page 3
MQFL-28V-1R5S
Output: 1.5V
Current: 40A
Technical Specification
MQFL-28V-1R5S ELECTRICAL CHARACTERISTICS
Parameter
Min. Typ. Max. Units Notes & Conditions
Group A
Vin=28V dc ±5%, Iout=40A, CL=0µF, free running (see Note 10) boost-converter Subgroup
non-operational unless otherwise specified
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
60
60
-0.8
-1.2
V
V
V
V
Operating
See Note 1
Reverse Bias (Tcase = 125ºC)
Reverse Bias (Tcase = -55ºC)
Isolation Voltage (I/O to case, I to O)
Continuous
-500
-800
-55
500
800
125
135
300
50
V
V
Transient (≤100µs)
Operating Case Temperature
Storage Case Temperature
Lead Temperature (20s)
°C
°C
°C
V
HB Grade ProductNotes & 15
-65
Voltage at ENA1, ENA2
-1.2
INPUT CHARACTERISTICS
Operating Input Voltage Range
“
16
28
28
40
50
V
V
Continous
4, 5, 6
5.5
Transt, 1s; see Under-Voltagransient Pr
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Input Over-Voltage Shutdown
Turn-Off Voltage Threshold
Turn-On Voltage Threshold
Shutdown Voltage Hysteresis
Maximum Input Current
See N
14.75 15.50 16.00
13.80 14.40 15.00
0.50
V
V
V
1, 2, 3
2, 3
1, 2, 3
1.10
1.80
SeNote 3
54.0
50.0
2.0
56.8
51.4
5.3
60.0
54.
8.0
8
160
5
A
m
mA
mA
mA
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
Vin out = 40A
No Load Input Current (operating)
Disabled Input Current (ENA1)
Disabled Input Current (ENA2)
Input Terminal Current Ripple (pk-pk)
OUTPUT CHARACTERISTICS
Output Voltage Set Point (Tcase = 25ºC)
Output Voltage Set Point Over Temperature
Output Voltage Line Regulation
Output Voltage Load Regulation
Total Output Voltage Range
Output Voltage Ripple and Noise Peak
Operating Output Current Range
Operating Output Power Range
Output DC Current-Limit Incepti
Short Circuit Output Current
Back-Drive Current Limit we Enab
Back-Drive Current Limiisable
Maximum Output Capacit
DYNAMIC CHARACTERIS
Output Voltage Deviation Load t
For a Pos. Shange in Load
For a Negge in Load
Settling Time )
Output Voltage Devansient
For a Pos. SteChanoltage
For a Neg. Step Chane ie Voltage
Settling Time (eiter case)
Turn-On Transient
110
8
Vin = 16V, 28V, 50V
n = 16V, 28V, 5
Bdwidth = 100kH– 10MFigure 14
0
148
47
-0
3
1.5
1.50
0
7
1.50
15
1.5
1.53
20
mV
mV
V
mV
A
W
A
A
A
Vout at sads
1
2, 3
“
“ ; Vin = 160V; Iout=40A
“ ; Vout@Ioutut@(Iout=40A)
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
See Note 5
11
1.46
1
0
Bandwdth = 10MHz; CL1µF
41
41
40
60
47
13
10
52
e Note 4
≤ 1.2V
53
50
10,000
A
Note 6
-450
3
350
mV
mV
µ
al Iout step = 20A‹-›40A, 4A‹-›20A; CL=11µF
4, 5, 6
4, 5, 6
4, 5, 6
50
“
See Note 7
Vin step = 16V‹-›50V; CL=11µF; see Note 8
-20
-200
2
200
500
mV
mV
µs
“
“
4, 5, 6
4, 5, 6
See Note 5
See Note 7
Output Voltage Rise me
Output Voltage Ovehoot
Turn-On Delay, Rising Vin
6
0
.0
1.5
10
2
8.0
6.0
3.0
ms
%
ms
ms
ms
Vout = 0.15V-›1.35V
4, 5, 6
See Note 5
4, 5, 6
4, 5, 6
4, 5, 6
ENA1, ENA2 = 5V; see Notes 9 & 12
ENA2 = 5V; see Note 12
ENA1 = 5V; see Note 12
Turn-On Delay, Rising ENA
Turn-On Delay, Rising ENA2
EFFICIENCY
Iout = 40A (16Vin)
TD
TBD
TBD
TBD
TBD
TBD
82
85
81
84
80
82
%
%
%
%
%
%
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
Iout = 20A (16Vin)
Iout = 40A (28Vi
Iout = 20A (28
Iout = 40A (40Vin)
Iout = 20A (40Vin)
Load Fault Power Dissipa
Short Circuit Power Dissipati
16
16
TBD
TBD
W
W
Iout at current limit inception point; See Note 4
Vout ≤ 1.2V
1, 2, 3
1, 2, 3
Product# MQFL-28V-1R5S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005187 Rev. 2
08/14/13
Page 4
MQFL-28V-1R5S
Output: 1.5V
Current: 40A
Technical Specification
MQFL-28V-1R5S ELECTRICAL CHARACTERISTICS (Continued)
Parameter
Min. Typ. Max. Units Notes & Conditions
Group A
Subgroup
Vin=28V dc ±5%, Iout=40A, CL=0µF, free running (see Note 10) boost-
converter non-operational unless otherwise specified
ISOLATION CHARACTERISTICS
Isolation Voltage
Dielectric strength
Input RTN to Output RTN
Any Input Pin to Case
500
500
500
100
100
V
V
V
MΩ
MΩ
nF
1
1
1
1
1
1
Any Output Pin to Case
Isolation Resistance (in rtn to out rtn)
Isolation Resistance (any pin to case)
Isolation Capacitance (in rtn to out rtn)
FEATURE CHARACTERISTICS
Switching Frequency (free running)
Synchronization Input
44
500
550
600
kHz
1, 2, 3
Frequency Range
Logic Level High
Logic Level Low
Duty Cycle
500
2.0
-0.5
20
600
10
0.8
80
kHz
V
V
1, 2,
1, 2, 3
%
Se Note 5
Synchronization Output
Pull Down Current
Duty Cycle
20
25
mA
%
VSYNC V
Output connected to SYNC Ither M
See Note 5
See Note 5
75
Enable Control (ENA1 and ENA2)
Off-State Voltage
Module Off Pulldown Current
On-State Voltage
0.8
µA
1, 2, 3
See Note 5
1, 2, 3
80
2
Curain requirto ensure moff
Module On Pin Leakage Current
Pull-Up Voltage
20
µA
V
Imax drawn frpin , module on
e Figure A
See Note 5
1, 2, 3
3.2
BOOST-CONVERTER OPERATION
Input Voltage Arming Value
Switching Frequency
Input Terminal Current Ripple (RMS)
Total Converter Efficiency
Iout = 15A (10Vin)
7.5
00
18.
670
1
1
70
Hz
A
1, 2, 3
1, 2, 3
1, 2, 3
Vin = 16V; Io
78
80
80
%
1, 2, 3
1, 2, 3
1, 2, 3
Iout = 15A (16Vin)
Iout = 30A (16Vin)
RELIABILITY CHARACTERI
Calculated MTBF (MIL-STD-217F2)
GB @ Tcase = 70ºC
2200
390
3 Hrs.
rs.
AIF @ Tcase = 70ºC
WEIGHT CHARACTERIST
Device Weight
Electrical Cheristics Note
1. Converter input over-e shutdown.
2. Derate output % of ratepower at T= 135ºigure 135ºC is above specified operating range.
3. High or low state oge must persist fot 200µs ted on by the lockout or shutdown circuitry.
4. Current limit ineption as the poiwhere output volas dropped to 90% of its nominal value.
5. Parameter not teted but ganteed to it spee
6. Load current trantion time ≥ 10µs.
7. Settling time measued from start of ransienpoint the output voltage has returned to ±50mV of its final value.
8. Line voltage transitioime ≥ 100µs.
9. Input voltage rise time ≤ 250µs.
10. Operating the converter at nchronizaton frequeove the free running frequency will cause the converter’s efficiency to be slightly reduced and it
may also cause a slight reduhe maximum output urrent/power available. For more information consult the factory.
11. SHARE pin outputs a power arning pule during a fault condition. See Current Share section of the Control Features description.
12. After a disable or fault event, ms inhibitefrom restarting for 300ms. See Shut Down section of the Control Features description.
13. Only the ES and Hproducsted athree temperatures. The C- grade products are tested at one temperature. Please refer to the
Construction and EvironStress SOptions table for details.
14. These deratinves apor the ES HB grade products. The C- grade product has a maximum case temperature of 70ºC and a maximum junction
temperature rise abovTcase.
15. The specified opcase temperature for ES grade products is -45ºC to 100ºC. The specified operating case temperature for C- grade products is 0ºC
to 70ºC.
Product# MQFL-28V-1R5S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005187 Rev. 2
08/14/13
Page 5
MQFL-28V-1R5S
Output: 1.5V
Current: 40A
Application Section
condition). When a load fault is removed, the output voltage
rises exponentially to its nominal value without an overshoot.
BASIC OPERATION AND FEATURES
The MQFL DC/DC converter uses a two-stage power conversion
topology. The first, or regulation, stage is a buck-converter that
keeps the output voltage constant over variations in line, load,
and temperature. The second, or isolation, stage uses trans-
formers to provide the functions of input/output isolation and
voltage transformation to achieve the output voltage required.
The MQFL converter’s control circuit dimplement an out-
put over-voltage limit or an otempehutdown.
The following sections describe e and ration of addi-
tional control features ided by FL cnverter.
In the MQFL-28V series of converters the regulation stage is
preceeded by a boost-converter that permits these converters
to operate through various Military and Aircraft under-voltage
transients. Further discussion of this feature can be found later
in these notes.
UNDER-VOGE TRANSINTS
The MQFL-2V series DC conrters incospecial
“boost-converte” stage rmits the convert
full poer through transienere its input voltage falls
low a5V. Normally, the oost-convenon-operational,
and tverter’s inpt voltage is passed ly to its pre-
egulatie (see te Block Diag). Wheunderolt-
age transirs, the boosconvbecomeerational,
and it steps-up the input volto a veater an 16V so
nominal output voltabe sud.
Both the regulation and the isolation stages switch at a fixed
frequency for predictable EMI performance. The isolation stage
switches at one half the frequency of the regulation stage, but
due to the push-pull nature of this stage it creates a ripple at
double its switching frequency. As a result, both the input
the output of the converter have a fundamental ripple freque
of about 550 kHz in the free-running mode.
It is imant to notthat the booverter stage must first
become “armed” bt can becomational. This “arm-
ing” occurs whehe cter’s input vtage exceeds approxi-
mely 18V. The boostrter then becomes operational
whenever e input voltage elow the arming voltage, and
it will reerational as loas the input voltage remains
within the rewn in the Under-Voltage Transient Profile
Pae. If the input drops below this transient profile, the
boostconverter stagnot guaranteed to continue operating
(it may, but it will protect itself from excessive stresses). Once
he boost- converer stops operating, the converter’s input volt-
will be reonnected directly to the input of the pre-regulator
The otput voltage will therefore collapse unless the
inpage is 16V, or greater.
Rectification of the isolation stage’s output is accoshed with
synchronous rectifiers. These devices, which FETs
with a very low resistance, dissipate far less energy t
Schottky diodes. This is the primary rason whthe
converters have such high efficiency, parcularly at lw outpu
voltages.
Besides improving efficiency, tous rectifiers permit
operation down to zero load current. o longer a need
for a minimum load, as is typical for conveat use diodes
for rectification. The syns rectifiers acually pera
negative load curreno flow to the converter’s
terminals if the losource rt or long term ene
The MQFL convertery a “-drive current limit” t
keep this negative outpual cuent small
te: the boost-converter will not become re-armed for the next
ient unless the input voltage once again exceeds approxi-
ately 18V.
There is circuit on the input and sides
of the MQFL that determines conducate
of the poweswitse circuits comcate wit
other across te isolatiarrier thra maetally coud
device. No opt-isolators are used.
The transient profile shown on the Under-Voltage Transient
Profile page is designed to comply (with appropriate margins)
with all initial-engagement surges, starting or cranking voltage
transients, and under-voltage surges specified in:
A separate bias pply provides power to the nput and
output control circuits. mong other thingsbias supply
permits the converter tate indefinitely ina short circuit
and to avoid a hiccup modn under a tough start-up condi-
tion.
ꢀ •ꢀMIL-STD-704-8ꢀ(AꢀthroughꢀF)
ꢀ •ꢀRTCA/DO-160
ꢀ •ꢀMIL-STD-1275
ꢀ •ꢀDEF-STANꢀ61-5ꢀ(Partꢀ6)/5ꢀ(operationalꢀportions)
Any input voltage transient that fits within the Under-Voltage
Transient Profile can be repeated after a delay that is at least
four times longer than the duration of the previous transient.
An input unvoltagckout fere with hysteresis is pro-
vided, as welinpover-voltage shutdown. There is also
an output currenthat is nearly constant as the load imped-
ance decreases to rt circuit (i.e., there is not fold-back
or fold-forward charac to the output current under this
During the time when the boost-converter stage is operational,
the converter’s efficiency is reduced and the input ripple cur-
Product# MQFL-28V-1R5S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005187 Rev. 2
08/14/13
Page 6
MQFL-28V-1R5S
Output: 1.5V
Current: 40A
Application Section
rent is increased. The lower the input voltage, the more these
parameters are affected.
mits the converter to be inhibited from either the input or the
output side.
Usually the converter has an EMI filter upstream of it, and the
source voltage is connected to the input of this EMI filter. When,
during compliance testing, the source voltage goes low during
an under-voltage transient, the input to the converter will go
even lower. This is because the inductance of the EMI filter (as
well as the parasitic source inductance) will cause an oscilla-
tory ring with the bulk capacitor. With the bulk capacitor that
is present in an MQME-28 filter, the peak of this under-voltage
ring may be approximately 2 volts if the source voltage drops
to 6V (it will be smaller than this at a higher transient source
voltage due to the lower current drawn by the converter). As
a result, it is necessary to add extra bulk capacitor across the
converter’s input pins if the source voltage is going to drop
toꢀ6V,ꢀasꢀitꢀdoesꢀforꢀMIL-STD-704(A)ꢀorꢀMIL-STD-1275D.ꢀItꢀisꢀ
recommendedꢀthatꢀaꢀ100μF/0.25WꢀESRꢀcapacitorꢀbeꢀconnectedꢀ
across the input pins of the converter be used as a starti
point.ꢀ Forꢀ MIL-STD-704(B-F),ꢀ whereꢀ theꢀ sourceꢀ voltageꢀ d
toꢀonlyꢀ7V,ꢀaꢀ47μFꢀhold-upꢀcapacitorꢀwouldꢀbeꢀaꢀgoodꢀstartingꢀ
point. The exact amount of capacitance required depends on
the application (source induc- tance, load power, e of fall of
the source voltage, etc). Please consult the farther
assistance is required.
Regardless of which pin is used to he converter, the
regulation and the isolation ss are off. However,
when the converter is inhibigh th1 pin, the bias
supply is also turned off, whereupply ains on when
the converter is inhibitd though tpinA higher input
standby current theefore results in thcase.
56V
82K
1N414
PIN
(OR PI
ENABL
TO ENABLE
CIRCURY
25
K
3904
PIN 2
(OR PIN 8)
IN
Fire A: Circuit dagram for reference only, actual circuit
components may differ from vhown for equivalent circuit.
Because input system stability is hardto maintin as t
input voltage gets lower, the MQFL-28V series conveters are
designed to give external access the voltge node btween
the boost-con- verter and the prr stages. This acess,
at the “STABILITY” pin (pin 3), perr to add a stabi-
lizing bulk capacitor with series resistance de. Since the
voltage at this node stays V, the amoucapacitace
required is much less an woequired on the convs
input pins where tage mop as low as 5.5V.
recommendedꢀthatꢀaꢀpacitorꢀanꢀESRꢀofꢀaboutꢀ1W b
connected between the TY piand the IUT RETURN
pin (pin 2). thout this spnection to thnal node
ofꢀtheꢀco300μFꢀstagꢀbulkꢀcapacitorꢀhaveꢀ
been required e conveter’s inpu.
Both enable pnternally pulled high so that an open con-
neion on both pinable the converter. Figure A shows
the equivalent circuit ling into either enable pins. It is TTL
compatible.
T DOWNThe MQFL converter will shut down in response
four cnditions: ENA1 input low, ENA2 input low, VIN
inpw under-voltage lockout threshold, or VIN input above
over-voltage shutdown threshold. Following a shutdown event,
re is a startup inhibit delay which will prevent the converter
restarting for approximately 300ms. After the 300ms delay
epses, if the enable inputs are high and the input voltage is
within the operating range, the converter will restart. If the VIN
input is brought down to nearly 0V and back into the operating
range, there is no startup inhibit, and the output voltage will
rise according to the “Turn-On Delay, Rising Vin” specification.
Another advatage of STABILITin is t it provid
volt- age sourcthat stays above 16n the -voltage
transient occurs. This voltage surce me usefr other
circuitry in the syem.
REMOTE SENSE: The purpose of the remote sense pins is
to correct for the voltage drop along the conductors that con-
nect the converter’s output to the load. To achieve this goal, a
separate conductor should be used to connect the +SENSE pin
(pin 10) directly to the positive terminal of the load, as shown
in the connection diagram on Page 2. Similarly, the –SENSE
pin (pin 9) should be connected through a separate conductor
to the return terminal of the load.
CONTROL FEATES
ENABLE: The Mnvertewo enble pins. Both must
have a logic high levthe coo be enabled. A logic
low on eithewill int the converter.
TheꢀENA1ꢀpinꢀ(piꢀreferencedꢀwithꢀrespectꢀtoꢀtheꢀconvert-
er’s input return (piThe ENA2 pin (pin 12) is referenced
with respect to the conr’s output return (pin 8). This per-
NOTE: Even if remote sensing of the load voltage is not desired,
the +SENSE and the -SENSE pins must be connected to +Vout
(pinꢀ7)ꢀandꢀOUTPUTꢀRETURNꢀ(pinꢀ8),ꢀrespectively,ꢀtoꢀgetꢀproperꢀ
Product# MQFL-28V-1R5S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005187 Rev. 2
08/14/13
Page 7
MQFL-28V-1R5S
Output: 1.5V
Current: 40A
Application Section
regulation of the converter’s output. If they are left open, the
converter will have an output voltage that is approximately
200mV higher than its specified value. If only the +SENSE pin
is left open, the output voltage will be approximately 25mV too
high.
NOTE: An MQFL converter that has its SYNC IN pin driven by
the SYNC OUT pin of a second MQFL converter will have its start
of its switching cycle delayed approximly 180 degrees rela-
tive to that of the second converter.
Figure B shows the equivalenooking he SYNC IN
pin. Figure C shows the equivcuit lng into the
SYNC OUT pin.
Inside the converter, +SENSE is connected to +Vout with a
resistor value from 100W to 301W, depending on output volt-
age, and –SENSE is connected to OUTPUT RETURN with a 10W
resistor.
It is also important to note that when remote sense is used, the
voltageꢀacrossꢀtheꢀconverter’sꢀoutputꢀterminalsꢀ(pinsꢀ7ꢀandꢀ8)ꢀ
will be higher than the converter’s nominal output voltage due
to resistive drops along the connecting wires. This higher volt-
age at the terminals produces a greater voltage stress on the
converter’s internal components and may cause the converter
to fail to deliver the desired output voltage at the low end of
the input voltage range at the higher end of the load current
and temperature range. Please consult the factory for detail
5K
TO SYNC
RCUIY
PIN 6
YNC IN
IN RTN
5K
PIN 2
SYNCHRONIZATION: The MQFL converter’s regulation and
isolation stage switching frequencies can be synchronized to
an external frequency source that is in the 500 kHz 0 kHz
range.ꢀTheꢀboost-converterꢀstageꢀisꢀfree-runningꢀat0ꢀ
kHz while it is operational, and is not affected by synchr
tion signals. A pulse train at the desired equency should
applied to the SYNC IN pin (pin 6) with repect to the INPUT
RETURN (pin 2). This pulse train shoulhave a duty cycle n the
20% to 80% range. Its low value be below 0.8V tbe
guaranteed to be interpreted as a ld its high value
should be above 2.0V to be guaranteed tpreted as a
logic high. The transition titween the twtes should
be less than 300ns.
Fgure B: Equivalent ciroking into the C IN pin with
respto the IN RT(inpu) pin.
5V
5K
SYNC OUT
ROM SYNC
CUITRY
PIN 5
PIN 2
IN RTN
OPEN COLLECTOR
OUTPUT
If the MQFL converteto be ronized, the SYNC IN
pin should be left open cie coner will then operate in
its free-running mode at a fy of approxim550 kHz.
FC: Equivalent circuit looking into SYNC OUT pin with
resect to the IN RTN (input return) pin.
If, due to a SYNC IN ps held in either a ow
or logic high statusly, the MQFL ter will
to its free-runnng fre
CURRENT SHARE: When several MQFL converters are placed
in parallel to achieve either a higher total load power or N+1
redundancy, their SHARE pins (pin 11) should be connected
together. The voltage on this common SHARE node represents
the average current delivered by all of the paralleled converters.
Each converter monitors this average value and adjusts itself so
that its output current closely matches that of the average.
The MQFL conveter also has a SYNC pin (This
output can be used o drive the NC IN pis mas ten
(10) other MQFL converters. The pulse train coout of SYNC
OUT has a duty cycle of 50and a frequency thatches the
switching frequency of the rter with which it s associated.
This frequency is either the frning frequency if there is no
synchronization sigthe SYpin, or the synchroniza-
tion frequency if there
Since the SHARE pin is monitored with respect to the OUTPUT
RETURN (pin 8) by each converter, it is important to connect
all of the converters’ OUTPUT RETURN pins together through a
low DC and AC impedance. When this is done correctly, the
converters will deliver their appropriate fraction of the total load
current to within +/- 10% at full rated load.
The SYNC OUT is aailable only when the voltage at the
STABILITY pin (pin above approximately 12V and when
the converter is not ind through the ENA1 pin. An inhibit
through the ENA2 pin wilturn the SYNC OUT signal off.
Product# MQFL-28V-1R5S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005187 Rev. 2
08/14/13
Page 8
MQFL-28V-1R5S
Output: 1.5V
Current: 40A
Application Section
100,000
10,000
1,000
1
Whether or not converters are paralleled, the voltage at the
SHARE pin could be used to monitor the approximate aver-
age current delivered by the converter(s). A nominal voltage
of 1.0V represents zero current and a nominal voltage of 2.2V
represents the maximum rated current, with a linear relationship
in between.
The internal source resistance of a converter’s
SHARE pin signal is 2.5 kW. During an input voltage fault or
primary disable event, the SHARE pin outputs a power failure
warning pulse. The SHARE pin will go to 3V for approximately
14msꢀasꢀtheꢀoutputꢀvoltageꢀfalls.
NOTE: Converters operating from separate input filters with
reverse polarity protection (such as the MQME-28-T filter) with
their outputs connected in parallel may exhibit hiccup operation
at light loads. Consult factory for details.
0.00
0.03
0.09
0.12
0.
rease in Vout (V)
Figurtput VoltagTrim Graph
OUTPUT VOLTAGE TRIM: If desired, it is possible to increase
the MQFL converter’s output voltage above its nominal value.
To do this, use the +SENSE pin (pin 10) for this trim functin
instead of for its normal remote sense function, as show
Figure D. In this case, a resistor connects the +SENSE pin to
the –SENSE pin (which should still be connected to the output
return, either remotely or locally). The value of the trim resistor
should be chosen according to the following eqr from
Figure E:
at the lof the input voltage e at ther end of
the load curd tempeure raPlease nsult the
tory for details. Factormed crs aravailable
.
INPUT UNDER-VGE LOCKOThe MQFL converter
has an under-vltagout feature at ensures the con-
ver will be off f the voltage is too low. This lockout
only appears when the bnverter is not operating. The
thresholput voltage at the converter will turn on is
higher that shold at whih it will turn off. In addition, the
MQFL converter respond to a state of the input voltage
usꢀitꢀhasꢀremahatꢀstateꢀforꢀmoreꢀthanꢀaboutꢀ200μs.ꢀ
This hysteresis and the delay ensure proper operation when the
source impedance is high or in a noisy environment.
407.5
Rtrim =
Vout - Vnom - 0.025
where:
Vnom = the converter’s nomvoltage,
Vout = the desired output voltage an Vnom), and
Rtrim is in Ohms.
UT OVER-VOLTAGE SHUTDOWN: The MQFL converter
aan oer-voltage feature that ensures the converter will
be ofe input voltage is too high. It also has a hysteresis
nd time delay to ensure proper operation.
As the output voltais trip, it produces a r
voltage stress on terter’al components and
cause the converter tdelivee desired output voltag
1
12
ENA 2
2
4
5
6
11
Exal bulk ca
RSTABITY
IN TN
SHARE
10
STABILITY
ENA 1
+SNS
+
28 Vdc
RTRIM
_
MQFL
9
-SNS
_
8
open
means
on
SYNC OUT
SYNC IN
OUT RTN
Load
7
+VOUT
TY
+
Figure D: Typical con for output voltage trimming.
Product# MQFL-28V-1R5S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005187 Rev. 2
08/14/13
Page 9
MQFL-28V-1R5S
Output: 1.5V
Current: 40A
Application Section
BACK-DRIVE CURRENT LIMIT: Converters that use MOSFETs
as synchronous rectifiers are capable of drawing a negative cur-
rent from the load if the load is a source of short- or long-term
energy. This negative current is referred to as a “back-drive
current”.
When the converter is mounted on a metal plate, the plate will
help to make the converter’s case bottom a uniform tempera-
ture. How well it does so depends e thickness of the plate
and on the thermal conductance of thce layer (e.g. ther-
mal grease, thermal pad, etctween e and the plate.
Unless this is done very wellportato mistake the
plate’s temperature for he maase tperature. It is
easy for them to be as much as 5ifferent at full power
and at high tempetures. It is sugghat a themocouple
be attached direthe verter’s cae through a small hole
in the plate when iting how ot the converter is getting.
Care must o be mensuthat thea large
thermal resistance betwthermocouple and t
to whever adhesive mighused to hold the thermocou
in pla
Conditions where back-drive current might occur include paral-
leled converters that do not employ current sharing, or where
the current share feature does not adequately ensure sharing
during the startup or shutdown transitions. It can also occur
when converters having different output voltages are connected
together through either explicit or parasitic diodes that, while
normally off, become conductive during startup or shutdown.
Finally, some loads, such as motors, can return energy to their
power rail. Even a load capacitor is a source of back-drive
energy for some period of time during a shutdown transient.
NPUT M INSTABILITY: s concan ccur
because /DC converter apincretally as a
negative resistance load. etailed cation ote titled
System Instability” is ble on ynQor website
ides an undetandinhy this instability arises,
and shothe prefed solution rrecting it.
To avoid any problems that might arise due to back-drive cur-
rent, the MQFL converters limit the negative current that te
converter can draw from its output terminals. The thres
for this back-drive current limit is placed sufficiently below zero
so that the converter may operate properly down to zero load,
but its absolute value (see the Electrical Characteriics page) is
small compared to the converter’s rated output
THERMAL CONSIDERATIONS: Figure
5
show
suggested Power Derating Curves fthis coverte
a function of the case temperature nd the maximum
desired power MOSFET junctiotemperature. All other
components within the convertooler than its ttest
MOSFET, which at full power is nan 20ºC higher
than the case temperature directly his MOSFET.
Theꢀ Mil-HDBK-1547Acompderatingꢀ guidelinesꢀ
for a maximum cont teure of 105ºC. Figu
therefore has one poating that ensures this lim
is maintained. It has beor’s tensive eerience that
reliable lonerm convertation can bved with
a maximonent temture of 125ºC. treme
cases,ꢀaꢀmaxieratureofꢀ145ºCꢀimissiblꢀnotꢀ
recommended for operation whegh relia
required. Deraing urfor these her teperature lis
are also includein Figure 5. The mam caserature
at which the converter should opera135ºC
Product# MQFL-28V-1R5S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005187 Rev. 2
08/14/13
Page 10
MQFL-28V-1R5S
Output: 1.5V
Current: 40A
Stress Screening
CONSTRUCTION AND ENVIRONMENTAL STRESS SCREENING OPTIONS
C-Grade
ES-Grade
HB-Grade
Consistent with
MIL-STD-883F
Screening
specified from
specified from
(
0spºeCcitfioe+d7f0roºmC ) (-45 ºC to 0 ºC) ºC to +125 ºC
)
Element Evaluation
No
Yes
Yes
Yes
Internal Visual
Temperature Cycle
Constant Acceleration
*
Yes
Condition B
(-5ºC to +125 º
ndition C
(o +150 C)
Method 1010
Method 2001
(Y1 Direction)
ondition A
5000g)
50
Burn-in
Method 1015
2rs @ +125 ºC
96 125 ºC
160 Hrs @ +125 ºC
Final Electrical Test
Metho5005 (GrouA)
+25 ºC
QorSeal
*
25, +100 ºC
Full QorSeal
Yes
-55, +25, +125 ºC
Full QorSeal
Yes
Mechanical Seal,
Thermal, and
Coating Prs
ternal Visual
Constrction Proess
QorSeal
QorSeal
QorSeal
* Per IPC-A-610 Class 3
MilQor conved filtee offered in three variations of environmental stress screening options. All MilQor converters use SynQor’s proprietary
QorSeal™ Hi-Rebly ocess that includes a Parylene-C coating of the circuit, a high performance thermal compound filler, and a nickel barrier
gold plated alumin. Each successively higher grade has more stringent mechanical and electrical testing, as well as a longer burn-in cycle. The ES-
and HB-Grades are alsructed of components that have been procured through an element evaluation process that pre-qualifies each new batch of
devices.
Product# MQFL-28V-1R5S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005187 Rev. 2
08/14/13
Page 11
MQFL-28V-1R5S
Output: 1.5V
Current: 40A
Mechanical Diagrams
0 [6.35]
+VIN
ENA 2
SHARE
+SNS
1
12
SEE NOTE 7
IN RTN
2
11
1.50 [38.1]
0.5.08]
TYPNON-CUM.
MQFL-28V-1R5S-X-ES
DC-DC ConVERtER
STABILITY
3
10 1.260
ENA 1
28Viꢀ 1.5Vꢁuꢂ @ 40A
4
-SNS
[32.00]
9
8
7
MADE IN USA
SYNC OUT
OUT RTN
+VOUT
5
0.040 [1.02]
S/N 0000000 D/C 3205-301 CAGE 1WX10
SYNC IN
6
2.50 [63.50]
2.760 [70.10]
3.00 [76.2]
0.050 [1.27]
0.128 [3.25]
.6]
2.96 [75.2]
[5.79]
0.390 [9.91]
e X
6.35]
+VIN
2
1
2
3
4
12
11
SEE NOTE 7
0.200 [5.08]
TYP.
IN RTN
+
[38.1]
STABILITY
ENA 1
MQFL-281R5S-U-ES
DC-DonVERtER
28VVꢁuꢂ @ 40A
10 1.260
NON-CUM.
-SNS
[32.00]
8
7
SYNC OUT
SYNC IN
OUT RTN
+VOUT
5
MADE IN A
0.040
[1.02]
PIN
S/N 000AGE 1WX10
6
0.42
[10.7]
2.50 [63.5]
760 [70.10]
0 [76.2]
0.050 [1.27]
0.128 [3.25]
0.22 [5.6]
2.80 [71.1]
0.390 [9.91]
Case U
PIN DESIGNATIONS
Pin # Function Pin # Function
NOTES
1)
Pins 0.040’’ (1.2mm) diameter
2)
Pin Material: Copper Al
Finish: Gold over Nicg, followed by Sn/Psolder dip
All dimensions in inches (lerances: .xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 .xx +/-)
Weight: 2.8 oz (7typical
WorkmanMeetxceeds IP610 Class III
Print LabeTop rface per Product Label Format Drawing
Pin 1 identificole, not intended for mounting (case X and U)
Baseplate flatnesnce is 0.004” (.10mm) TIR for surface.
1
2
3
4
5
6
Positive input
Input return
Stability
Enable 1
Sync output
Sync input
7
8
9
Positive output
Output return
- Sense
3)
4)
5)
6)
7)
8)
10 + Sense
11 Share
12 Enable 2
Product# MQFL-28V-1R5S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005187 Rev. 2
08/14/13
Page 12
MQFL-28V-1R5S
Output: 1.5V
Current: 40A
Mechanical Diagrams
0.300 [7.62]
1.150 [29.21]
0.140 [3.56]
0.250 [6.35]
TYP
0.250 [6.35]
+VIN
ENA 2
SHARE
1
12
11
10
9
0.200
TYP. NO
2.000
[50.80]
IN RTN
2
3
4
5
6
STABILITY
ENA 1
+SNS
MQFL-28V-1R5S-Y-ES
DC-DC ConVERtER
28Viꢀ 1.5Vꢁuꢂ @ 40A
1.50
[38.1]
-SNS
SYNC OUT
SYNC IN
MADE IN USA OUT RTN
8
1.750
[44.45]
S/N 0000000 D/C 3211-301 CAGE 1WX10
+VOUT
7
0.04[1.0]
PIN
0.0
1.750 [44.45]
2.50 [63.5]
0.375 [9.52]
0[5.6]
2.96 [75.2]
0.228 [5.7
0.3[9.91]
Case Y
Case Z
t of Y)
Case W
(variant of Y)
0.250 [6.35]
0.250 [6.35]
0.200 [5.08]
P. NON-CUM.
0.200 [5.08]
TYP. NON-CUM.
0.040 [1.02]
PIN
0.040
PIN
0.22 [5.6]
0.050 [1.27
[10.7]
0.050 [1.27]
0.22 [5.6]
.36 [9.14]
2.80 [71.1]
0.525 [13.33]
0.390
[9.91]
0.525 [1
0.390
[9.91]
2.80 [71.
PIN DESIGNATIONS
Pin # Function Pin # Function
NOTES
1)
Pins 0.040’’ (1.2mm) diameter
2)
Pin Material: Copper Al
Finish: Gold over Nicg, followed by Sn/Psolder dip
All dimensions in inches (lerances: .xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 .xx +/-)
Weight: 2.8 oz (7typical
WorkmanMeetxceeds IP610 Class III
Print LabeTop rface per Product Label Format Drawing
Pin 1 identificole, not intended for mounting (case X and U)
Baseplate flatnesnce is 0.004” (.10mm) TIR for surface.
1
2
3
4
5
6
Positive input
Input return
Stability
Enable 1
Sync output
Sync input
7
8
9
Positive output
Output return
- Sense
3)
4)
5)
6)
7)
8)
10 + Sense
11 Share
12 Enable 2
Product# MQFL-28V-1R5S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005187 Rev. 2
08/14/13
Page 13
MQFL-28V-1R5S
Output: 1.5V
Current: 40A
Ordering Information
MilQor Converter FAMILY MATRIX
The tables below show the array of MilQor converters available. When ordering SynQor conveplease ensure that
you use the complete part number according to the table in the last page. Contact the facory foequirements.
Single Output
Duautput †
1.5V
1.8V
2.5V
3.3V
5V
6V
7.5V
9V
12V
15V
28V
12V
15V
Full Size
MQFL-28
(1R5S) (1R8S) (2R5S) (3R3S)
(05S)
(06S)
(7R5S)
(09S)
(12S)
(15S)
(28S)
(12D)
(15D)
16-40Vin Cont.
24A
Total
10A
8
Total
40A
40A
40A
40A
40A
40A
40A
40A
40A
40A
40A
40A
40A
40A
40A
30A
30A
30A
30A
30A
24A
24A
20A
20A
24A
20A
20A
7A
17A
16A
16A
13A
13A
16A
13A
A
11A
11A
13
10A
10A
8A
4A
4A
16-50Vin 1s Trans.*
Absolute Max Vin = 60V
MQFL-28E
16-70Vin Cont.
To
10A
otal
8A
Total
16-80Vin 1s Trans.*
Absolute Max Vin =100V
MQFL-28V
16-40Vin Cont.
6.5A
A
8A
A
3.3A
5.5-50Vin 1s Trans.*
Absolute Max Vin = 60V
MQFL-28VE
16-70Vin Cont.
8A
5.5-80Vin 1s Trans.*
Absolute Max Vin = 100V
MQFL-270
155-400Vin Cont.
24A
Total
10A
Total
8A
Total
10A
155-475Vin 1s Trans.*
Absolute Max Vin = 550V
MQFL-270L
15A
Total
6A
Total
5A
Total
65-350Vin Cont.
40A
22A
15A
12A
10A
8A
6A
2.7A
65-475Vin 1s Trans.*
Absolute Max Vin = 550V
Single Ou
Dual Output †
1.5V
2.5V
3.3V
5V
6V
9V
12V
15V
28V
5V
12V
15V
Half Size
R5S) 2R5S) (3R3S)
(05S)
(7R
S)
(12S)
(15S)
(28S)
(05D)
(12D)
(15D)
MQHL-28
16-40Vin Cont.
10A
Total
4A
Total
3.3A
Total
A
10A
20A
20A
0A
20A
2
1
15A
A
5A
10A
1
8A
8A
4A
A
6.6A
3.3A
5.5A
5.5A
4A
4A
2A
3.3A
3.3A
1.8A
1.8A
0.9A
16-50Vin 1s Trans.*
Absolute M60V
MQHL
16-70Vin Cont.
10A
Total
4A
Total
3.3A
Total
16-80Vin 1s Tns.*
Absolute Max Vi=100V
MQHR-28
16-40Vin Cont.
5A
Total
2A
Total
1.65A
Total
2.75A
1.65A
16-50Vin 1s Trans.*
Absolute Max Vin = 60V
MQHR-28E
16-70Vin Cont.
5A
Total
2A
Total
1.65A
Total
10A
A
10A
7.5A
5A
4A
3.3A
2.75A
2A
1.65A
0.9A
16-80Vin 1s Trans.*
Absolute Max Vin = 100V
Check with factvailability.
†80% of total outpnt available on any one output.
*Converters may be oat the highest transient input voltage, but some component electrical and thermal stresses would be beyond MIL-
HDBK-1547A guidelines.
Product# MQFL-28V-1R5S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005187 Rev. 2
08/14/13
Page 14
MQFL-28V-1R5S
Output: 1.5V
Current: 40A
Ordering Information
PART NUMBERING SYSTEM
The part numbering system for SynQor’s MilQor DC-DC converters follows the format shown in the e below.
Not all combinations make valid part numbers, please contact SynQor for availability. See the Product Sumweb pore options.
Example: MQFL-28V-1R5S-Y-ES
Output Voltage(s)
Input
Voltage
Range
Model
Name
Package Out/
Pin Config
Scrg
Grde
Single
Dual
Output
Output
1R5S
1R8S
2R5S
3R3S
05S
06S
7R5S
09S
28
28E
28V
28VE
W
Z
MQFL
MQHL
MQHR
05D
12D
1
H
270
270L
12S
15S
28
APPLICATION NOTES
A variety of application notes and technie papers can bwnloaded in pformat from the SynQor website.
PATENTS
SynQor holds the followiatents, or more of which apply to roduct listed in this document. Additional patent applications may be
pending or filed in the futu
5,999,4
6,894,468
5,687
6,222,742
6,896,52
7,269,034
1
6,
6,927,9
,272,021
890
6,57709
7,050,3
2,023
149,597
6,594,159
7,072,190
7,558,083
6,731,520
7,085,146
7,564,702
Contact SynQor for furer information aorder:
Warranty
SynQor offers a two (2) year limited warranty. Complete warranty informa-
tion is listed on our website or is available upon request from SynQor.
Phone:
Toll Free: 1-567-996
-849-0600
Fax:
ail:
W
978-0602
mqnbofae@synqor.com
www.synqor.com
Information furnished by SynQor is believed to be accurate and reliable.
However, no responsibility is assumed by SynQor for its use, nor for any
infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any
patent or patent rights of SynQor.
Addr155 Swanson Road
oxborough, MA 01719
USA
Product# MQFL-28V-1R5S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005187 Rev. 2
08/14/13
Page 15
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