MQFL-28V-7R5S-Y-ES [SYNQOR]
HIGH RELIABILITY DC-DC CONVERTER; 高可靠性DC-DC转换器
| 型号： | MQFL-28V-7R5S-Y-ES |
| 厂家： | 
SYNQOR WORLDWIDE HEADQUARTERS |
| 描述： | HIGH RELIABILITY DC-DC CONVERTER |
| 文件： | 总18页 (文件大小：1251K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MQFL-28V-7R5S
Single Output
HI G H RELIABILITY DC-DC CONVERTER
16-40V
5.5-50V
7.5V
13A
90% @ 6/ 90% @ 13A
Continuous Input
Transient Input
Output
Output
Effi
FU L L PO W E R OP E R A T I O N : -55ºC TO +12
®
The MilQor series of high-reliability DC/DC converters
brings SynQor’s field proven high-efficiency synchronous
rectifier technology to the Military/Aerospace industry.
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 follow conservative compo
derating guidelines. They are designed and manufactured
to comply with a wide range of military standards.
-HB
-7R
ꢂꢁ
R
ꢁ
13
M
DC/DC
8Vin
@
Meets all -704 and -1275B under-voltasients
Design Process
MQFL series converters are:
• Designed for reliability per N3641-A guidelin
D
F
& MA N U F A C T U R E D IN T H E USA
E T U O R -REL S S E M B L Y
EAL™ H
Q
S
I
A
• Designed with components dera
— MIL-HDBK-1547A
Features
— NAVSO P-3641A
xed swtching frequency
• pto-isolators
• Parallel operation with current share
Remote sense
• Clock synchronization
• Primary and secondary referenced enable
Qualificatiocess
MQFL series converters lified to:
• MIL-ST
— conth RTCA/-160E
• SynQor’s First ualification
• Continuous short circuit and overload protection
• Input under-voltage lockout/over-voltage shutdown
— consistent itSTD-883F
• SynQor’s Long-Term Storage Survity Qution
• SynQor’s on-going life test
Specification Compliance
In-Line Manufaing Process
MQFL series converters (with MQME filter) are designed to meet:
• MIL-HDBK-704-8 (A through F)
• RTCA/DO-160E Section 16
• MIL-STD-1275B
• AS9100 and ISO 9001:certified facility
• Full component tbility
• Temperaycling
• DEF-STAN 61-5 (part 6)/5
• MIL-STD-461 (C, D, E)
• RTCA/DO-160E Section 22
• Constant action
• 24, 96, 160 hrn-in
• Three level tempercreening
Product # MQFL-28V-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 1
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
BLOCK DIAGRAM
BOOST
REGULATION STAGE
ISOLATION
CONVERTER
SWITCHES
AND
7
+Vout
CURRENT
SENSE
1
+Vin
CONTROL
2
8
INPUT
RETURN
UTPUT
CASE
GATE DRIVERS
GATRIVERS
3
STABILITY
CURRENT
12
UVLO
ENABLE 2
4
MAGNETIC
ENABLE 1
11
PRIMARY
CONTROL
SEY
CO
SHARE
5
SYNC OUT
ATA C
10
+ SENSE
6
SYNC IN
9
SENSE
POWER
CONTROL
POWER
RANSFR
TYPICAL CONNION DIAGRM
1
12
11
10
9
+
ENA 2
open
means
on
Ernal bulk c
4
5
6
IN RTN
SHARE
+ SNS
STABILITY
ENA 1
+
-
MQFL
RSTABILIT
Y
+
-
Load
28 Vdc
- SNS
pen
means
on
8
SYNC OUT
SYNC IN
OUT RTN
+VOUT
7
Product # MQFL-28V-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 2
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
MQFL-28V-7R5S ELECTRICAL CHARACTERISTICS
Parameter
Min. Typ. Max. Units Notes & Conditions
Group A
Subgroup
Vin=28V dc ±5%, Iout=13A, CL=0µF, freote 10)
boost-converter non-operational unless otherwis
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
60
60
-0.8
-1.2
V
V
V
V
Operating
See Note 1
See N2
Reverse Bias (Tcase = 125ºC)
Reverse Bias (Tcase = -55ºC)
Isolation Voltage (I/O to case, I to O)
Continuous
-500
-800
-55
500
800
135
135
300
50
V
V
°C
°C
°C
V
Transient (≤100µs)
Operating Case Temperature
Storage Case Temperature
Lead Temperature (20s)
-65
Voltage at ENA1, ENA2
-1.2
INPUT CHARACTERISTICS
Operating Input Voltage Range
"
16
28
28
40
50
V
V
ous
1, 2, 3
46
5.5
T1s; see Uder-Voltage Tsient 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
Se
14.75 15.50 16.00
13.80 14.40 15
0.50
V
V
1, 2, 3
1, 2, 3
1, 2, 3
1.10
ote 3
54.0
50.0
2.0
56.8
51.4
5.3
60.0
54.0
8.0
7.5
160
V
V
V
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 = 16V; ut =
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 Tempee
Output Voltage Line Regulation
Output Voltage Load Regulation
Total Output Voltage Range
Output Voltage Ripple and Nose Peak to Peak
Operating Output Current Ra
Operating Output PoweRange
Output DC Current-Leption
Short Circuit Output
Back-Drive Current Limiabled
Back-Drive Current Limit wbled
Maximum put Capacitanc
DYNAMACTERISTI
Output Volon Load Trient
For a Pos. Stn Load Current
For a NegStep ad Current
Settling Time (eiter
Output Voltage Deviation ne Transie
For a Pos. SteChange in Line Voltage
For a Neg. Step hange in Linoltage
Settling Time (eher case)
Turn-On Transient
25
80
Vin = 16V, 28V, 50V
Vin V, 28V, 50V
Ba100kHz – 10Msee Figure 14
1
7.42
.40
-20
5
7.5
7.50
0
35
7.50
20
7.58
7.60
20
V
V
mV
mV
V
A
A
A
Vout at sen
1
2, 3
"
" ; Vin = 16V, 240V; Iout=13A
" ; Vout @ (Iout=0A) - Vout @ (Iout=13A)
"
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
45
7.65
40
Bandwith = 0MHz; CL=11µF
0
0
13.5
13.5
13
1
15
15.5
4
Note 4
Vt ≤ 1.2V
10
50
5,000
See Note 6
0
-3
350
100
mV
mV
µs
Total Iout step = 6.5A‹-›13A, 1.3A‹-›6.5A; CL=11µF
4, 5, 6
4, 5, 6
4, 5, 6
0
"
See Note 7
Vin step = 16V‹-›50V; CL=11µF; see Note 8
-500
00
500
500
500
mV
mV
µs
"
"
4, 5, 6
4, 5, 6
See Note 5
0
See Note 7
Output Voltage Rise Ti
Output Voltage Oversho
Turn-On Delay, Rising Vin
6
0
5.5
3.0
1.5
10
2
8.0
6.0
3.0
ms
%
ms
ms
ms
Vout = 0.75V-›6.75V
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, RENA1
Turn-On Delay, RA2
EFFICIENCY
Iout = 13A
TBD
TBD
TBD
TBD
TBD
TBD
90
91
90
90
89
89
14
16
%
%
%
%
%
%
W
W
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
Iout = 6.5A (1
Iout = 13A (28Vi
Iout = 6.5A (28Vin)
Iout = 13A (40Vin)
Iout = 6.5A (40Vin)
Load Fault Power Dissipatn
Short Circuit Power Dissipation
24
24
Iout at current limit inception point; See Note 4
Vout ≤ 1.2V
Product # MQFL-28V-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 3
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
MQFL-28V-7R5S ELECTRICAL CHARACTERISTICS (Continued)
Parameter
Min. Typ. Max. Units Notes & Conditions
Group A
Subgroup
Vin=28V dc ±5%, Iout=13A, CL=0µF, free Note 10)
boost-converter non-operational unless otherw
ISOLATION CHARACTERISTICS
Isolation Voltage
Input RTN to Output RTN
Any Input Pin to Case
Dielectric strength
500
500
500
100
100
V
V
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
V
MΩ
MΩ
nF
44
500
550
600
kHz
1, 2, 3
Frequency Range
500
2.0
-0.5
20
600
10
0.8
80
kHz
V
V
%
1,
1, 2, 3
Logic Level High
Logic Level Low
Duty Cycle
See Note 5
Synchronization Output
Pull Down Current
Duty Cycle
20
25
A
%
V= 0.8V
Outcted to SYNC IN of otFL unit
See ote 5
See Note 5
75
Enable Control (ENA1 and ENA2)
Off-State Voltage
Module Off Pulldown Current
On-State Voltage
Module On Pin Leakage Current
Pull-Up Voltage
µA
V
1, 2, 3
See Note 5
1, 2, 3
See Note 5
1, 2, 3
80
2
rent drain required to enodule is
20
4.5
Idrawn froin allowed, mn
See Figure A
3.2
4.0
BOOST-CONVERTER OPERATION
Input Voltage Arming Value
Switching Frequency
Input Terminal Current Ripple (RMS)
Total Converter Efficiency
Iout = 15A (10Vin)
17.5
600
0.9
18.8
0
V
kH
A
1, 2, 3
1, 2, 3
Vin 16V; Iout = 13A
6
8
88
%
%
%
1, 2, 3
1, 2, 3
1, 2, 3
Iout = 15A (16Vin)
Iout = 30A (16Vin)
RELIABILITY CHARACTERISTIC
Calculated MTBF (MIL-STD-217F2)
GB @ Tcase = 70ºC
3
2200
390
TBD
Hrs.
AIF @ Tcase = 70ºC
Hrs.
Demonstrated MTBF
s.
WEIGHT CHARACTERISTIC
Device Weight
79
g
Electrical Characters
1. Converter will underver-voshutdown.
2. Derate output power to rated per at Tcase 135ºC.
3. High or low state of input must ersist for 200µs to be actthe lockout or shutdown circuitry.
4. Current ception is defie point where put voltage has pped to 90% of its nominal value.
5. Parameed but guarad to the limit specifi
6. Load currentime ≥ 1µs.
7. Settling time mstart of transienpoint we output voltage has returned to ±1% of its final value.
8. Line voltagtransi100µs.
9. Input voltage rise time 50µs.
10. Operating thconverter at a synchronfrequeve the free running frequency will cause the converter’s efficiency to be slightly reduced
and it may also case a slight reduion in thmum ocurrent/power available. For more information consult the factory.
11. SHARE pin outps a power failure warning uring fault condition. See Current Share section of the Control Features description.
12. After a disable or fault event, modue is inhibirestarting for 300ms. See Shut Down section of the Control Features description.
13. Only the ES and HB graproducts are tested at e temperatures. The C grade products are tested at one temperature. Please refer to the
Construction and Environtress Screening Optns table for details.
14. These derating curves aphe ES- and HB- grade products. The C- grade product has a maximum case temperature of 100ºC and a maximum
junction temperaturof 20ºTcase.
Product # MQFL-28V-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 4
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
Under-Voltage Transient Profile
Boost-Converter is armed when Vin
exceeds this value
V
ARM (~18 V)
Boost-Converter Operational Area
dV 0.1V
VIN
dt
µs
5.5 V
0
1.5
15
ime (s
Under-Voltage Transient Profile hen the boost-convter is guaranteed to be operational. The boost-converter must
first be armed by having V > VARM. nder-voltage trient can occur ater a delay equal to four times the duration
IN
of the previous transienboost-converis rearmd.
Note:
This Unage Transiefile is designeomply (with propiate margins) with all initial-engagement surges, start-
ing or crankge transents and er-voltarges ecified in:
• ML-ST-(A throF)
• RTCA/DO-160E
• MIL-SD-1275B
• DEF-STAN 61(part 6)/5 (operl portions)
Product # MQFL-28V-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 5
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
TBD
TBD
Figure 1: Efficiency at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at Tcase=25°C.
Figurciency at nominal output ltage arated power
vs. casture for put voltage oV, 28V, V.
TBD
T
Figure 3: Power dissat noput voltage vs. load c
for minimum, nominaximum voltage at Tcase=25°C.
FPower dissipation at nominal output voltage and 60% rated
power vs. case temperature for input voltage of 16V, 28V, and 40V.
TBD
TBD
Figure 5: Output Curutput Power derating curve as a function
of Tcase and the Maximed power MOSFET junction temperature
at Vin = 28V (see Note 14)
Figure 6: Output voltage vs. load current showing typical current limit
curves.
Product # MQFL-28V-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 6
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
TBD
TBD
Figure 7: Turn-on transient at full resistive load and zero output
capacitance initiated by ENA1. Input voltage pre-applied.
Ch 1: Vout (2V/div). Ch 2: ENA1 (5V/div).
Figurrn-on transiet at full resistie loa0mF output
capacitiated by ENA1. Input vge pre.
Ch 1: Vo). Ch : ENA1 (5V/d
T
TBD
Figure 9: Turn-on traat full load and zero output
capacitance initiated Input e pre-applied.
Ch 1: Vout (2V/div). Ch 25V/di
F: Turn-on transient at full resistive load and zero output
capacitance initiated by Vin. ENA1 and ENA2 both previously high.
h 1: Vout (2V/div). Ch 2: Vin (10V/div).
TBD
TBD
Figure 12: Output voltage response to step-change in load current 0%-
50%-0% of Iout (max). Load cap: 1µF ceramic cap and 10µF, 100 mΩ
ESR tantalum cap. Ch 1: Vout (200mV/div). Ch 2: Iout (10A/div).
Figure 11: Output vosponse to step-change in load current 50%
-100%-50% of Iout (maad cap: 1µF ceramic cap and 10µF,
100 mΩ ESR tantalum caCh 1: Vout (200mV/div). Ch 2: Iout (10A/div).
Product # MQFL-28V-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 7
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
See Fig. 16
See Fig. 15
iC
MQME
Filter
Co
VOUT
TBD
VSOURCE
10µF,
1µF
ceramic
100m
R
W
ca
Figure 13: Output voltage response to step-change in input voltage
(16V - 50V - 16V). Load cap: 10µF, 100 mΩ ESR tantalum cap and 1µF
ceramic cap. Ch 1: Vout (200mV/div). Ch 2: Vin (20V/div).
Figurst set-up diaram showing measuroints for I
nput Teipple Cuent (Figure 1nd Outage Rle (
Figure 16
T
TBD
Figure 15: Input termrrent rat full rated output c
and nominal input voltSynQofilter module (50mA/div)
Bandwidth: 20MHz. See .
Fi: Output voltage ripple, Vout, at nominal input voltage and
rated load current (20 V/div). Load capacitance: 1μF ceramic capacitor
nd 10μF tantalum capacitor. Bandwidth: 10MHz. See Figure 14.
TBD
TBD
Figure 17: Rise of oltage after the removal of a short circuit
across the output termin1: Vout (2V/div). Ch 2: Iout (10A/div).
Figure 18: SYNC OUT vs. time, driving SYNC IN of a second SynQor
MQFL converter. Ch1: SYNC OUT: (1V/div).
Product # MQFL-28V-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 8
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
TBD
TBD
Figure 19: Magnitude of incremental output impedance
(Zout = vout/iout) for minimum, nominal, and maximum input voltage
at full rated power.
Figuragnitude of cremental foard trion
(FT = vor minimum, nominal, maximt voltae
afull rate
T
TBD
F: Magnitude of incremental input impedance (Zin = vin/iin)
for minimum, nominal, and maximum input voltage at full rated power.
Figure 21: Magnitudremene transmission
(RT = iin/iout) for minominal, maximum input voltage
at full rated power.
TBD
TBD
Figure 23: High freqonducted emissions of standalone
MQFL-28-05S, 5Vout m120W output, as measured with Method
CE102. Limit line shown he ‘Basic Curve’for all applications with
a 28V source.
Figure 24: High frequency conducted emissions of MQFL-28-05S,
5Vout module at 120W output with MQFL-28-P filter, as measured with
Method CE102. Limit line shown is the ‘Basic Curve’for all applications
with a 28V source.
Product # MQFL-28V-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 9
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
The MQFL converter’s control circuit does not implement an output
over-voltage limit or an over-temperature shutdown.
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 transformers
to provide the functions of input/output isolation and voltage
transformation to achieve the output voltage required.
The following sections describe te use ation of additional
control features provided by FL con
UNDER-VOLTAGE TRANTS
The MQFL-28V seof DCDC convertncorporata special
“boost-converter” hat permits the converters to deliver full
power throuh transere its it voltage fto as low as
5.5V. Norma, the bverteis non-opthe
converr’s input voltage ed directly to its pre-r
stage e the Block DiagraWhen an nder-voltage transient
occurboost-conveer becomes peraand it steps-up
he inpge to a vaue greater tn 16V the ninal
output von be sustained.
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.
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
switching frequency. As a result, both the input and the out
the converter have a fundamental ripple frequency of about 550
kHz in the free-running mode.
is important to note thaoost-cor stagmust first
armed” before it can boperat. This “arming”
occthe converter’s input e exceeds approximately
18V. The boost-conthen becomrational whenever the
input voltage dros bhe arming vge, and it will remain
opational as lonas tht voltage remains within the region
shown in the Under-Voltage ient Profile. If the input voltage
drops beis transient profhe boost-converter stage is not
guaranteed nue operating (it may, but it will protect itself
from excessive stOnce the boost-converter stops operating,
thonverter’s inpt e will be reconnected directly to the
input of the preregulatr stage. The output voltage will therefore
collapse unless the input voltage is 16V, or greater.
Rectification of the isolation stage’s output is accd with
synchronous rectifiers. These devices, which are MOSa
very low resistance, dissipate far less energy than would S
diodes. This is the primary reason why thMQFL converters ha
such high efficiency, particularly at low output voltages.
Besides improving efficiency, thronous rectifiers ermit
operation down to zero load currenno longer a need
for a minimum load, as is typical for coat use diodes
for rectification. The syns rectifiers lly permia
negative load current to flointo the converter’s ut
terminals if the load ource or long term energy
MQFL converters empback-durrent limit” to keep th
negative output terminal small.
: the boost-converter will not become re-armed for the
nnsient unless the input voltage once again exceeds
approely 18V.
transient profile shown in the Under-Voltage Transient Profile
esigned to comply (with appropriate margins) with all initial-
engagement surges, starting or cranking voltage transients, and
under-voltage surges specified in:
There is a circuit on binput and outps of the
MQFL conveetermines e conduction state oower
switches. These cmunicate with other ace
isolation barrir throgagneticalcoupleevice. No -
isolators are usd.
• MIL-STD-704-8 (A through F)
• RTCA/DO-160E
• MIL-STD-1275B
A separate bias pply provides power h the put and
output control circuits. Among other thingsbias supply
permits the converter to ote indefinitely into a ort circuit and
to avoid a hiccup mode, ender a tough start-up condition.
• DEF-STAN 61-5 (Part 6)/5 (operational portions)
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 under-volckout fwith hysteresis is provided,
as well as inper-voltatdown. There is also
an output limit hat is nearly constant as the load
impedance decto a short circuit (i.e., there is not fold-
back or fold-forwaracteristic to the output current under this
condition). When a lolt is removed, the output voltage rises
exponentially to its nomivalue without an overshoot.
During the time when the boost-converter stage is operational, the
converter’s efficiency is reduced and the input ripple current is
increased. The lower the input voltage, the more these parameters
are affected.
Product # MQFL-28V-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 10
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
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 oscillatory 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 to 6V, as it does for MIL-STD-704(A)
or MIL-STD 1275B. It is recommended that a 100µF/0.25W ESR
capacitor be connected across the input pins of the converter be
used as a starting point. For MIL-STD-704(B-F), where the source
voltage drops to only 7V, a 47µF hold-up capacitor would be a
good starting point. The exact amount of capacitance requied
depends on the application (source inductance, load powe
of fall of the source voltage, etc). Please consult the factory if
further assistance is required.
when the converter is inhibited through the ENA1 pin, the bias
supply is also turned off, whereas this supply remains on when
the converter is inhibited through t2 pin. A higher input
standby current therefore resuin the se.
Both enable pins are internled hio that an open
connection on both pinill enabonver. Figure A shows
the equivalent circuit looking into nable pins. It is TTL
compatible.
SHUT DOWN: TL converwill shut dwn in response
5.6V
8
1N4148
PIN 4
(or PIN 12)
BLE
O ENABLE
IRCUITRY
250K
12
2N3904
Because input system stability is harder to n as the
input voltage gets lower, the MQFL-28V series are
designed to give external access to the voltage node be
boost-converter and the pre-regulator staes. This acess,
“STABILITY” pin (pin 3), permits the user to add a stablizing bu
capacitor with series resistance to ts nodeSince the voltage at
this node stays above 16V, the of capacitance quired
is much less than would be requireonverter’s input pins
where the voltage might drop as low as s recommended
that a 22µF capacitor wESR of aboube connected
between the STABILITY pin e INPUT RETURN ppin
2). Without this spconnethe internal node
converter, a 300µF ing bupacitor would have b
required across the coninput ns.
IN 2
(or PIN 8)
IN RTN
Figure A: nt circuit loong into either the ENA1 or ENA2
pins with respeorresponding return pin.
to only four condition: ENA1 input low, ENA2 input low, VIN
input below under-voltage lockout threshold, or VIN input above
ver-voltage shudown threshold. Following a shutdown event,
is a strtup inhibit delay which will prevent the converter
fstarting for approximately 300ms. After the 300ms delay
elapses, if the enable inputs are high and the input voltage is
within the operating range, the converter will restart. If the VIN
t is brought down to nearly 0V and back into the operating
nge, there is no startup inhibit, and the output voltage will rise
according to the “Turn-On Delay, Rising Vin” specification.
Another age of the TY pin is thaovides a
voltage sostays abe 16V when the uoltage
transient occursage source miuseful her
circuitry in the syst
REMOTE SENSE: The purpose of the remote sense pins is to
correct for the voltage drop along the conductors that connect 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. Similarly, the –SENSE pin (pin 9) should be
connected through a separate conductor to the return terminal of
the load.
CONTROL FEATURES
ENABLE: The MQFL coerter has two enabns. Both must
have a logic high level e converter to be enabled. A logic
low on either pin will inhibconverter
The ENA1 pin (pin eferench respect to the converter’s
input return 2). TENA2 pin (pin 12) is referenced with
respect to the ertes output return (pin 8). This permits the
converter to be id from either the input or the output side.
NOTE: Even if remote sensing of the load voltage is not desired, the
+SENSE and the -SENSE pins must be connected to +Vout (pin 7)
and OUTPUT RETURN (pin 8), respectively, to get proper 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.
Regardless of which s used to inhibit the converter, the
regulation and the isoation stages are turned off. However,
Product # MQFL-28V-7R5S
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Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 11
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
Inside the converter, +SENSE is connected to +Vout with a resistor
value from 100W to 301W, depending on output voltage, and
–SENSE is connected to OUTPUT RETURN with a 10W resistor.
5V
5K
It is also important to note that when remote sense is used,
the voltage across the converter’s output terminals (pins 7 and
8) will be higher than the converter’s nominal output voltage
due to resistive drops along the connecting wires. This higher
voltage 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 details.
TO SYNC
CIRCUITRY
PIN 6
PIN 2
SYNC I
5K
Figure B: Evalent cokininto the S
respet to the IN RTN (inpn) pin.
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 to 600 kHz range.
The boost-converter stage is free-running at about 670 kHz while
it is operational, and is not affected by synchronization signa
pulse train at the desired frequency should be applied to th
IN pin (pin 6) with respect to the INPUT RETURN (pin 2). This pulse
train should have a duty cycle in the 20% to 80% range. Its low
value should be below 0.8V to be guaranteed tinterpreted
as a logic low, and its high value should be abto be
guaranteed to be interpreted as a logic high. The tran
between the two states should be less than 300ns.
V
SUT
ROM SYNC
TRY
PIN 5
IN RTN
PIN 2
LLECTOR
UT
Figure uivalent circuit linto SYNC OUT pin with
respect to TN (input retn) pin.
If the MQFL converter is not to be synchronized, the SYNC IN pin
should be left open circuit. The crter withen operte in its
free-running mode at a frequencimately 550 Hz.
CURRENT SHAen several MQFL converters are placed
in parallel to achievther a higher total load power or N+1
redundancy, their SHARE pins (pin 11) should be connected
together. The voge on this common SHARE node represents the
erage currnt delivered by all of the paralleled converters. Each
rter moitors this average value and adjusts itself so that its
ourrent closely matches that of the average.
If, due to a fault, the SYNC IN pin is heler a logic low
or logic high state continhe MQFL corter will vert
to its free-running freuency.
The MQFL converteas a C OUT pin (pin 5). T
output can be used to e SYC IN pins as many as
ten (10) er MQFL coThe pulse oming out
of SYNC s a duty cof 50% and a ncy tha
matches the frequency of the erter wich it
is associated. Thiy is either the fnning frcy
if there is no synchronion signathe SC IN pin, the
synchronizatiofrequency if there is
ince the SHARE pin is monitored with respect to the OUTPUT
URN (pin 8) by each converter, it is important to connect all of
he 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.
Whether or not converters are paralleled, the voltage at the
SHARE pin could be used to monitor the approximate average
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 14ms as the output voltage falls.
The SYNC OUT gnal is available only we voage at the
STABILITY pin (pin 3) is bove approximatV and when
the converter is not inthrough the ENApin. An inhibit
through the ENA2 pin wiurn the SYNC OUT signal off.
NOTE: An MQFL rter thits SYNC IN pin driven by
the SYNC Opin second FL converter will have its
start of its sg cye delayed approximately 180 degrees
relative to that second converter.
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.
Figure B shows the alent circuit looking into the SYNC
IN pin. Figure C showthe equivalent circuit looking into the
SYNC OUT pin.
Product # MQFL-28V-7R5S
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Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 12
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
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 function instead
of for its normal remote sense function, as shown in 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 equation or from Figure E:
100,000
10,000
1,000
100
Vnom
Rtrim = 100 x
[
Vout – Vnom – 0.025
]
where:
Vnom = the converter’s nominal output voltage,
Vout = the desired output voltage (greater than Vnom), and
Rtrim is in Ohms.
0.00
0.15
0.45
0.60
0.75
0
Increase n Vou
As the output voltage is trimmed up, it produces a greater voltage
stress on the converter’s internal components and may cause
the converter to fail to deliver the desired output voltage a
low end of the input voltage range at the higher end of the lo
current and temperature range. Please consult the factory for
details. Factory trimmed converters are available by request.
Figure EVoltage Trim Graph
OVER-VOLTAGE SOWNMQFL converter
over-voltage eature sures the converter will be
off if the input voltas too high. It as a hysteresis and time
delay to ensure proeration.
INPUT UNDER-VOLTAGE LOCKOUT: The MQFr has
an under-voltage lockout feature that ensures the conver
off if the input voltage is too low. This locout only apears
the boost-converter is not operating. The theshold of inut voltag
at which the converter will turn on ihigher that the thrshold at
which it will turn off. In additioMQFL converter ll not
respond to a state of the input vos it has remained in
BCK-DRIVE CURRENT: Converters that use MOSFETs as
synchronrectifiers are cof drawing a negative current
from the the load is a sce of short- or long-term energy.
This negative is referred to as a “back-drive current”.
Conitions where bacve current might occur include paralleled
converters that do not employ current sharing, or where the current
share feature des not adequately ensure sharing during the
rtup or shudown transitions. It can also occur when converters
g differnt output voltages are connected together through
that state for more than about 200µs. Ths and the delay
ensure proper operation whhe source impe is high or in
a noisy environment.
1
12
N
ENA 2
2
4
5
6
11
ternal bulk tor
RTABILITY
IN RTN
SHARE
10
STABILITY
ENA 1
+SNS
+
28 Vdc
RTRIM
MQFL
9
-SNS
8
op
means
on
SYNC OUT
SYNC IN
OUT RTN
Load
7
+VOUT
TABILITY
+
Figure D: Typical conneon for output voltage trimming.
Product # MQFL-28V-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 13
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
CONSTRUCTION AND ENVIRONMENTAL STRESS SCREENING OPTIONS
ꢁS-Grade
(-55 ºC to +125 ºC)
(ꢁlement ꢁvaluation)
de
(-55 ººC)
ement on)
Consistent with
MIL-SꢂD-883F
C-Grade
(-40 ºC to +100 ºC)
Screening
Internal Visual
Yes
ꢀo
Yes
Yes
*
Condition B
(-55 ºC to 5 ºC)
C
(-65 ºC 50 ºC)
ꢂemperature Cycle
Method 1010
Constant
Acceleration
Method 2001
(Y1 Direction)
ondition A
(5000g)
ꢀo
500
Method 1015
Load Cycled
Burn-in
• 10s period
24 Hrs @ +125 ºC
96 Hrs @ +125 ºC
160 Hrs ºC
• 2s @ 100% Load
• 8s @ 0% Load
Method 5005
(Group A)
Final ꢁlectrical ꢂest
5 ºC
-45, 100 ºC
Full QorSl
-55, 5 ºC
orSeal
Mechanical Seal,
ꢂhermal, and Coating
Process
Full QorSeal
ꢁxternal Visual
2009
Ye
Yes
*
Construction Process
Qal
Seal
QorSeal
* Per PC-A-610 (RevD) Class 3
MilQor converters and filters are offered ariations of conction technique ad environmental stress screening options. The
three highest grades, C, EHB, all use Syr’s propritary Ql™ Hi-Rel assembly process that includes a Parylene-C coating
of the circuit, a high erformrmal compound fillea nicrrier god plated aluminum case. Each successively higher
grade has more stmechand electrical testingell as er burn-in cycle. The ES- and HB-Grades are also con-
structed of componehave bprocured through an elevaluation process that pre-qualifies each new batch of devices.
Product # MQFL-28V-7R5S
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www.synqor.com
Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 14
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
0.093
[2.36]
250 [6.
+VIN
ENA 2
1
12
IN RTN
SHARE
2
11
1.50 [38.10]
08]
TYUM.
MQFL-28V-7R5S-X-HB
DC/DC CONVERTER
28Vin 7.5Vout @ 13A
STABILITY
+SNS
-SNS
3
4
5
6
10 1.260
[32.00]
ENA 1
9
8
7
MADE IN USA
OUT RTN
+VOUT
SYNC OUT
SYNC IN
040 [1.02]
S/N 0000000 D/C 3205-301 CAGE 1WX10
PIN
2.50 [63.50]
2.76 [70.10]
3.00 [76.20]
0.050 [
0.0 [5.59]
8 [3.25]
2.96 [75.2]
0.228 [5.7
]
e X
0.093
[2.36]
0.250 [6
+VIN
ENA
1
11
0.200 [5.08]
TYP. NON-CUM.
IN RTN
STABILITY
SHRE
2
3
4
5
6
1.50 [3
MQFL-28V-7-U-HB
DC/DC CONVERT
28Vin 7.5Vou
SNS
NS
10 260
[32.00]
ENA 1
7
OUT RTN
+VOUT
SYNC OUT
SYNC IN
N USA
0.040 [1.02]
PIN
S/N 00 D/C 3205-301 CA
0.42
[10.7]
2.0]
2.76 0]
00 [720]
0.050 [1.27]
0.220 [5.59]
0.128 [3.25]
0 [71.1]
Case U
0.390 [9.91]
NOTES
PIN DESIGNATIONS
1)
2)
Pins 0.040” (1.02mmeter
Pin Function
Pin Function
Pins Material: Copper
Finish: Gold over Nickel pla
1
2
3
4
5
6
Positive input
Input return
Stability
7
8
9
Positive output
Output return
- Sense
3)
All dimensions in (mm) es: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +10 in. +/-0.25
4)
5)
6)
Weight: 28.5 ) typical
Enable 1
10 + Sense
11 Share
Workmanship: or exceeds IPC-A-610C Class III
Print Labeling on Tce per Product Label Format Drawing
Sync output
Sync input
12 Enable 2
Product # MQFL-28V-7R5S
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Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 15
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
0.300 [7.62]
0.140 [3.56]
1.15 [29.21]
0.250 [6.35]
TYP
0.250 [6.35]
1
2
3
4
5
6
+VIN
12
ENA 2
00 [5.0
ON-C.
2.00
[50.80]
IN RTN
STABILITY
SHARE
+SNS
11
10
9
MQFL-28V-7R5S-Y-HB
DC/DC CONVERTER
28Vin 7.5Vout @ 13A
1.50
[38.10]
-SNS
ENA 1
OUT RTN
+VOUT
SYNC OUT
SYNC IN
MADE IN USA
8
1.750
[44.45]
S/N 0000000 D/C 3205-301 CAGE 1WX10
7
0.040 [1.
PIN
0.50 [1.
.220 [5
1.750 [44.45]
2.50 [63.50]
0.375 [9.52]
2.96 [75.2]
5.79]
0.390
Case Y
Z
(varia
Case W
(variant of Y)
0.5]
0.250 [6.35]
0.200 [5.08]
0.200 5.08]
TYP. NON-CU.
TYP. NON-CUM.
040 [1.02]
0.040 [1.02]
PIN
0.420 [10.7]
0.050 [1.27]
0.220 [5.59]
0.220 [5.59]
.27]
.36 [9.2]
2.80 [71.1]
0.525 [13.33]
0.390
[9.91]
0.390
[9.91]
3.33]
2.80 [71.1]
PIN DESIGNATIONS
Pin Function Pin Function
NOTES
1)
Pins 0.040” (1.02mm) dia
2)
Pins Material
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
Finish: Goover plate
All dimn inc(mm) Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0. (x.xx +/-0.25mm)
Weight: 2.8 oz g) typical
Workmanship: Mexceeds IPC-A-610C Class III
Print Labeling on Top face per Product Label Format Drawing
3)
4)
5)
6)
10 + Sense
11 Share
12 Enable 2
Product # MQFL-28V-7R5S
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Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 16
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
MilQor Converter FAMILY MATRIX
The tables below show the array of MQFL converters available. When ordering SynQor converters, ensure that you use
the complete part number according to the table in the last page. Contact the factory for otheuirem
Single Output
Duutput †
28V
1.5V
1.8V
2.5V
3.3V
5V
6V
7.5V
9V
12V
(12S)
V
(15S)
2V
(12D)
±15V
(15D)
Full Size
(1R5S) (1R8S) (2R5S) (3R3S) (05S)
(06S) (7R5S) (09S)
(28S)
MQFL-28
16-40Vin Cont.
2
Total
10A
Total
A
Tota
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
17A
20A
16A
16A
3A
A
16A
13A
3A
11A
13A
10
10A
8A
8A
4
16-50Vin 1s Trans.*
Absolute Max Vin = 60V
MQFL-28ꢁ
16-70Vin Cont.
16-80Vin 1s Trans.*
Absolute Max Vin =100V
24A
Total
10A
Total
Tota
MQFL-28V
16-40Vin Cont.
5.5-50Vin 1s Trans.*
Absolute Max Vin = 60V
20A
Total
6.5
Tota
6.A
6.5A
A
3.3A
4A
MQFL-28Vꢁ
16-70Vin Cont.
5.5-80Vin 1s Trans.*
Absolute Max Vin = 100V
To
8A
tal
6.5A
Total
8A
MQFL-270
155-400Vin Cont.
155-475Vin 0.1s Trans.*
Absolute Max Vin = 550V
A
10A
Total
8A
Total
10A
ingle Out
Dual Output †
1.5V
1.8V
2.5V
3.3V
7.5V
9V
12V
12S)
15V
(15S)
±5V
(05D)
±12V
(12D)
±15V
(15D)
Half Size
(1R5S) (1R8S) (2R5(3R3S) (05S)
R5S) (0
MQHL-28 (50W)
16-40Vin Cont.
16-50Vin 1s Trans.*
Absolute Max Vin = 60V
10A
Total
4A
Total
3.3A
Total
20A
20A
20A
20A
20A
15A
A
1A
10A
8A
8A
6.6A
6.6A
5.5A
5.5A
4
3A
3.3A
1.8A
1.8A
MQHL-28ꢁ (50W)
16-70Vin Cont.
16-80Vin 1s Trans.*
Absolute Max Vin =100V
10A
Total
4A
Total
3.3A
Total
MQHR-28 (25W)
16-40Vin Cont.
16-50Vin 1s Trans.*
Absolute Max Vin = 60V
5A
Total
2A
Total
1.65A
Total
10A
A
10A
0A
7.5A
7.5
5A
5A
4A
3.
75A
2.75A
2A
2A
1.65A
1.65A
0.9A
0.9A
MQHR-28ꢁ (25W)
16-70Vin Cont.
16-80Vin 1s Tns.*
Absolute M00V
5A
Total
2A
Total
1.65A
Total
Check wir availability
Product # MQFL-28V-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 17
MQFL-28V-7R5S
Curren
13A
ꢂechnical Specification
PART NUMBERING SYSTEM
The part numbering system for SynQor’s MilQor DC-DC converters follows the format shown in the tabelow.
Output Voltage(s)
Input
Model
ꢀame
Package Outline/
Pin Configuration
ing
Voltage
Range
Single
Output
Dual
Output
1R5S
1R8S
2R5S
3R3S
05S
06S
7R5S
09S
28
28ꢁ
28V
28Vꢁ
U
Z
C
H
MQFL
MQHL
MQHR
05D
12D
15D
270
12S
15S
28S
Example:
-28V-7–Y–ES
APPLICATION NOTES
A variety of application notes al white papers can be downloaded in pdf foat from the SynQor website.
PATENTS
SynQor holds the fopatenne or more of which mpply to this product:
5,999,41
6,927,
6,222,74
,050,309
545,890
072,190
,109
7,046
6,559
7119,524
6,731,520
7,269,034
6,894,468
7,272,021
6,896,526
7,272,023
Contact SynQor or further inftion:
Phone:
8-849-0600
Warranty
SynQor offers a two (2) year limited warranty. Complete warranty
information is listed on our website or is available upon request from
SynQor.
Toll Free: 867-9596
Fax:
978-0602
ail:
W
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.
Add155 Swanson Road
oxborough, MA 01719
USA
Product # MQFL-28V-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005188 Rev. 1 04/16/09
Page 18
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