MQFL-28E-7R5S [SYNQOR]
HIGH RELIABILITY DC-DC CONVERTER; 高可靠性DC-DC转换器
| 型号： | MQFL-28E-7R5S |
| 厂家： | 
SYNQOR WORLDWIDE HEADQUARTERS |
| 描述： | HIGH RELIABILITY DC-DC CONVERTER |
| 文件： | 总17页 (文件大小：1259K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MQFL-28E-7R5S
Single Output
HI G H RELIABILITY DC-DC CONVER
16-70V
16-80V
7.5V
16A
908A / % @ 16A
Continuous Input
Transient Input
Output
Output
ciecy
FU L L PO W E R OP E R A T I O N : -55ºC T5º
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 enures
survivability in the most hostile environments. Compatible
with the industry standard format, these conve
at a fixed frequency, have no opto-isolators, and follow
conservative component derating guines. They are
designed and manufactured to comply with range of
military standards.
-HB
16
FL-28E-7R5S
@
CONVERTER
out
.5V
Design Process
MQFL series converters are:
• Designed for reliability per NAVSO-Pguidelines
E A T U R IN G O R -REL S S E M B L Y
EALH
Q
S
I
A
• Designed with comporated per:
— MIL-HDB47A
Features
— NAVSO 1A
• Fixed switching frequency
• No opto-isolators
• Parallel operation with current share
• Remote sense
• Clock synchronization
• Primary and secondary referenced enable
Qucation Pr
MQFL seriers are qualified
• MIL-STD-810
— consistent wRTCA/DE
• SynQor’s First Article Qualificat
• Continuous short circuit and overload protection
• Input under-voltage lockout/over-voltage shutdown
— consisnt with MIL-SD-883F
• SynQor’s Long-Term Storage Survivabualification
• SynQor’s on-gointest
Specification Compliance
In-Line MacturProcess
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
• AS91d ISO 001:2000 certified facility
• Full comptraceability
• Temperature g
• DEF-STAN 61-5 (part 6)/5
• MIL-STD-461 (C, D, E)
• RTCA/DO-160E Section 22
• Constant acceler
• 24, 96, 160 hour burn-in
• Three level temperature screening
Product # MQFL-28E-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005157 Rev. 1
04/30/09
Page 1
MQFL-28E-7R5S
16A
Curren
Technical Specification
BLOCK DIAGRAM
REGULATION STAGE
ISOLN STAG
7
CURRENT
SENSE
1
POSITIVE
OUTPUT
POSITIVE
INPUT
T1
T
1
T2
2
INPUT
RETURN
O
RETURN
3
CASE
GATE
GATE DRIVERS
UVLO
OVSD
12
CURRENT
LIMIT
ENABLE 2
4
MA
11
ENABLE 1
PRIMARY
CONTROL
SECONDARY
CONTROL
SHARE
5
10
DATA COUPLING
SYNC OUTPUT
+ SENSE
6
9
SYNC INPUT
-
SENSE
BIAS POR
PO
TRANSFORMER
TYPCONNEON DIAGR
12
+VIN
ENA 2
open
means
on
11
10
TN
SHARE
+ SNS
3
CASE
+
–
MQFL
4
5
6
9
8
7
+
–
28 Vdc
Load
ENA 1
– SNS
OUT RTN
+VOUT
SYNC OUT
SYNC IN
o
means
n
Product # MQFL-28E-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005157 Rev. 1
04/30/09
Page 2
MQFL-28E-7R5S
16A
Curren
Technical Specification
MQFL-28E-7R5S ELECTRICAL CHARACTERISTICS
Parameter
Min. Typ. Max. Units Notes & Condition
Group A
Subgroup
Vin=28V dc ±5%, Iout=16A, CLe runnin10)
unless otherwise specified
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
100
100
-0.8
-1.2
V
V
V
V
Operating
See Note 1
See Note 2
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
16
28
28
70
80
V
s
Tra
See Note 3
1, 2, 3
4, 5, 6
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
14.75 15.50
13.80 14.40
0.50
1, 2, 3
1, 2, 3
1, 2, 3
1.10
1.80
See Note 15
90
8
3
95
6
100
90
15
5
V
V
A
mA
mA
mA
mA
1,3
1,3
1,3
Vin = 16V; Iout = 16
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
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
Output Voltage Set Point Over Temp
Output Voltage Line Regulation
Output Voltage Load Regulation
Total Output Voltage Rang
Output Voltage Rippland Noo Peak
Operating Output Range
Operating Outpunge
Output DC Current-Lition
Short Circuit Output Cur
Back-Drivurrent Limit wled
Back-Dnt Limit whiled
Maximupacitance
DYNAMIC CISTICS
Output Voage DTransient
For a PosStep hLoad Cur
For a Neg. Step Chane in Load C
Settling Tim(either case)
Output Voltage eviation Line nsient
For a Pos. SteChange in Line Voltage
For a Neg. Step Change n Line Volage
Settling Time (either
Turn-On Transient
11
2
25
0
V, 28V, 70V
Vin V, 70V
BandwidHz – 10MHz; see Figure 14
60
7.42
7.4
7
7.5
7.50
0
35
7.50
20
7.58
7.6
20
V
V
mV
V
W
A
Vout at sense le
1
2, 3
"
" ; Vin 16V, 28V, 70V; Iout=16A
" ; Vout (Iout=0A) - Vout @ (Iout=16A)
"
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
Bandwdth = 10MHz; CL=11µF
0
0
16.5
16
18
19
5
See Note 4
Vout ≤ 1.2V
22.7
0
5
5,00
A
µF
See Note 6
50
-350
350
00
mV
mV
µs
Total Iout step = 8A‹-›16A, 1.6A‹-›8A; CL=11µF
4, 5, 6
4, 5, 6
4, 5, 6
550
250
"
See Note 7
Vin step = 16V‹-›50V; CL=11µF; see Note 8
0
500
500
500
mV
mV
µs
"
"
4, 5, 6
4, 5, 6
See Note 5
250
See Note 7
Output Voltage Rise Tim
Output Voltage ershoot
Turn-On Delay, Vin
6
0
5.5
3.0
1.5
10
2
8.0
6.0
3.0
ms
%
ms
ms
ms
Vout = 0.75 V -› 6.75 V
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 ay, RiNA1
Turn-O, RisinNA2
EFFICIENC
Iout = 16A (16
TBD
TBD
TBD
TBD
TBD
TBD
TBD
89
91
89
90
87
89
84
18
20
%
%
%
%
%
%
%
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
1, 2, 3
Iout = 8A (16 Vin
Iout = 16A (28Vin)
Iout = 8A (28Vin)
Iout = 16A (40Vin)
Iout = 8A (40Vin)
Iout = 16A (70Vin)
Load Fault Power Dissipation
32
33
Iout at current limit inception point; See Note 4
Vout ≤ 1.2V
Short Circuit Power Dissipation
Product # MQFL-28E-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005157 Rev. 1
04/30/09
Page 3
MQFL-28E-7R5S
16A
Curren
Technical Specification
MQFL-28E-7R5S ELECTRICAL CHARACTERISTICS (Continu
Parameter
Min. Typ. Max. Units Notes & Condition
Group A
Subgroup
Vin=28V dc ±5%, Iout=16A, Ce runnin10)
unless otherwise specified
ISOLATION CHARACTERISTICS
Isolation Voltage
Dielectric strengt
Input RTN to Output RTN
Any Input Pin to Case
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
Frequency Range
500
2.0
-0.5
20
700
10
0.8
80
kHz
V
V
%
1, 2, 3
1, 2, 3
2, 3
Logic Level High
Logic Level Low
Duty Cycle
See Note 5
Synchronization Output
Pull Down Current
Duty Cycle
20
25
mA
VSYNC OUT = 0.8V
Output connected to SYf other nit
See Note 5
See Note 5
Enable Control (ENA1 and ENA2)
Off-State Voltage
Module Off Pulldown Current
On-State Voltage
Module On Pin Leakage Current
Pull-Up Voltage
0.8
V
µA
V
µA
1, 2, 3
See Note 5
1, 2, 3
See Note 5
1, 2, 3
80
2
Current drain ired to ensure is off
20
4.5
Imax drafroowed, moduon
See Figure
3.2
RELIABILITY CHARACTERISTICS
Calculated MTBF (MIL-STD-217F2)
GB @ Tcase = 70ºC
3
2800
40
TD
10 Hrs.
3
AIF @ Tcase = 70ºC
10 Hrs.
3
Demonstrated MTBF
10 Hrs.
WEIGHT CHARACTERISTICS
Device Weight
79
g
Electrical Characteristics Notes
1. Converter will undergo input over-voltag.
2. Derate output power to 5f rated power = 135ºC (see Fi).
3. High or low state of input ust persist for bout 200µo be acby the locout or shutdown circuitry.
4. Current limit incepn is defie point where the ouage hed to 9% of its nominal value.
5. Parameter not tt guarthe limit specified.
6. Load current trane ≥ 10
7. Settling time measustart of nsient to the point where tht voltage has returned to ±1% of its final value.
8. Line voltage transition 00µs.
9. Input vge rise time ≤
10. Opconverter at hronization frequove the fee runing frequency will cause the converter’s efficiency to be slightly reduced
and it may slight rection in the aximum urrentwer available. For more information consult the factory.
11. SHARE pin wer failure warie during contion. See Current Share section of the Control Features description.
12. After a isable nt, modulis inhifrom restor 300ms. See Shut Down section of the Control Features description.
13. Only the S and HB de productested t te tempeures. The C grade products are tested at one temperature. Please refer to the
Construction ad Environmental Stress ng Optle for details.
14. These deratig curves apply r the EB- graoducts. The C- grade product has a maximum case temperature of 100ºC.
15. Input Over Vge Shutdown est is run ad, fuoad is beyond derating condition and could cause damage at 125ºC.
Product # MQFL-28E-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005157 Rev. 1
04/30/09
Page 4
MQFL-28E-7R5S
16A
Curren
Technical Specification
TBD
TBD
Figure 1: Efficiency at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at Tcase=25°C
Figure 2: Efcy at nomiutput vnd 60% ated power vs.
e temperature for input vf 16V, V ,and 70V.
TBD
TBD
Figure 3: Power dissipnominutput voltagvs. load curre
for minimum, nominal, anum iput voltagase=25°C.
Figure 4: Power dissipation at nominal output voltage and 60% rated
wer vs. case temperature for input voltage of 16V, 28V, 40V ,and 70V.
TBD
TBD
Figure 5: Output CurreOutput Power derating curve as a
function of Tcase and the Maximum desired power MOSFET junction
temperature (see Note 14).
Figure 6: Output voltage vs. load current showing typical current
limit curves.
Product # MQFL-28E-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005157 Rev. 1
04/30/09
Page 5
MQFL-28E-7R5S
16A
Curren
Technical 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).
Figure 8: ransient all resisd and 1F output
capacitance initiated by Eut volt-applid. Ch 1:
V/div). Ch 2: ENA1 (5V
TBD
TBD
Figure 10: Turn-on transient at full resistive load and zero output
pacitance initiated by Vin. ENA1 and ENA2 both previously high.
Ch 1: Vout (2V/div). Ch 2: Vin (10V/div).
Figure 9: Turn-on tranull resie load and ro output
capacitance initiated by Eput vltage pre-d. Ch 1:
Vout (2h 2: ENA2 (
TBD
TBD
Figure 11: Output voltaresponse to step-change in load current
50%-100%-50% of Iout (max). Load cap: 1µF ceramic cap and
10µF, 100mΩ ESR tantalum cap. Ch 1: Vout (500mV/div). Ch 2: Iout
(10A/div).
Figure 12: Output voltage response to step-change in load current 0%-
50%-0% of Iout (max). Load cap: 1µF ceramic cap and 10µF, 100mΩ
ESR tantalum cap. Ch 1: Vout (500mV/div). Ch 2: Iout (10A/div).
Product # MQFL-28E-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005157 Rev. 1
04/30/09
Page 6
MQFL-28E-7R5S
16A
Curren
Technical Specification
See Fig. 16
See F
M
MQ
onverter
TBD
VOUT
VSOURCE
1
ceramic
1
ESR
capactor
capacitor
Figure 14: up diagrahowinrement nts for
Input Terminal Ripple Curure 15tput oltage Ripple
16).
Figure 13: Output voltage response to step-change in input voltage
(16V - 50V - 16V). Load cap: 10µF, 100mΩ ESR tantalum cap
ceramic cap. Ch 1: Vout (200mV/div). Ch 2: Vin (20V/div).
TBD
TBD
Figure 15: Input termint rippc, at full rad output curre
and nominal input voltagnQor MQ filter e (50mA/div).
BandwiMHz. See Fig
Figure 16: Output voltage ripple, Vout, at nominal input voltage and
ed load current (20mV/div). Load capacitance: 1μF ceramic capacitor
and 10μF tantalum capacitor. Bandwidth: 10MHz. See Figure 14.
TBD
TBD
Figure 17: Rise of outpuoltage after the removal of a short circuit
across the output terminals. Ch 1: Vout (2V/div). Ch 2: Iout (5A/div).
Figure 18: SYNC OUT vs. time, driving SYNC IN of a second SynQor
MQFL converter. Ch1: SYNC OUT: (1V/div).
Product # MQFL-28E-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005157 Rev. 1
04/30/09
Page 7
MQFL-28E-7R5S
16A
Curren
Technical Specification
TBD
TBD
Figure 19: Magnitude of incremental output impedance (Zout =
vout/iout) for minimum, nominal, and maximum input voltage at
rated power.
Figure 20: de of incrental foransmin (FT = vout/
vin) for minimum, nominalximum oltage at full rated
TBD
TBD
Figure 21: Magnitude ental rrse transmiion (RT =
iin/iout) fominimum, nod maximum inpge at full
rated p
Figure 22: Magnitude of incremental input impedance (Zin = vin/iin)
minimum, nominal, and maximum input voltage at full rated power.
TBD
TBD
Figure 23: High frequenconducted emissions of standalone MQFL-
28-05S, 5Vout module at 120W output, as measured with Method
CE102. Limit line shown is the ‘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-28E-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005157 Rev. 1
04/30/09
Page 8
MQFL-28E-7R5S
16A
Curren
Technical Specification
BASIC OPERATION AND FEATURES
CONTROL FEATURES
ENABLE: The MQFL conas two e pins. Both must
have a logic high level for thrter to enabled. A logic
low on either pin wiibit the er.
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 transform-
ers to provide the functions of input/output isolation and voltage
transformation to achieve the output voltage required.
The ENA1 pin (4) is rferenced wspect to tconverter’s
input return (pThe ENA2 pin (in 12) is referenced with
respect to the cooutput urn (pin 8his permits the
converter tbe inhibm eiter the inpside.
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 and the output of
the converter have a fundamental ripple frequency of about 550
kHz in the free-running mode.
Redless of which pin ied to inhibit the converter, the r
latnd the isolaton stages are turn. However, when
the er is inhibed through e ENAthe bias supply
is alsoff, whereas this suremainwhen the con-
verter is ithrough thENA2 A highnput standby
current therefore results itter ca
Rectification of the isolation stage’s output is accomplish
synchronous rectifiers. These devices, which are MOSFETs with
very low resistance, dissipate far less energy than would Schottky
diodes. This is the primary reason why the MQFL onverters have
such high efficiency, particularly at low output .
ble pins are inernally high so that an open con-
nection on both will enable nverter. Figure A shows
the equivalent ciroking into eenable pins. It is TTL
ompatible.
Besides improving efficiency, the synchronous rectift
operation down to zero load current. here is no ongea
for a minimum load, as is typical for converters that ue diodes or
rectification. The synchronous rtifiers actually permit a nega-
tive load current to flow back ionverter’s outpuerminals
if the load is a source of short oenergy. The MQF
converters employ a “back-drive curreo keep this neg
tive output terminal curll.
SHUT WN: The MQerter will shut down in response
to only nditions: ENinput low, ENA2 input low, VIN
input below oltage lockout threshold, or VIN input above
ver-voltage shhreshold. Following a shutdown event,
5.6V
82K
There is a control it on binput and output sidhe
MQFL converter tmines nduction state of the p
switches. These circmunicwith each other across t
isolation barrier througgnetically codevice. No
opto-isre used.
1N4148
(or PIN 12)
ENABLE
TO ENABLE
CIRCUITRY
250K
125K
2N3904
A separate bprovides poweh the ind ou-
put controcircung other tngs, thbias supplmits
the converter to opete indefinto a ircuit nd to
avoid a hiccup mode, even under a start-udition.
PIN 2
(or PIN 8)
IN RTN
Figure A: Equivalent circuit looking into either the ENA1 or ENA2
pins with respect to its corresponding return pin.
An input under-voltage lockout feature witresis is provided,
as well as an input r-voltage shutdownhere is also an
output current limit thaarly constant as the load impedance
decreases to a short circe., there s not fold-back or fold-
forward charato the t current under this condition).
When a lofault moved, tput voltage rises exponen-
tially to inal ve without an overshoot.
there is a startup inhibit delay which will prevent the converter
from restarting 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
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.
The MQFL concontrol circuit does not implement an output
over-voltage limit over-temperature shutdown.
The following sectiondescribe the use and operation of addi-
tional control features provided by the MQFL converter.
Product # MQFL-28E-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005157 Rev. 1
04/30/09
Page 9
MQFL-28E-7R5S
16A
Curren
Technical Specification
synchronization signal at the SYin, or the synchroniza-
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 con-
nection diagram on Page 2. Similarly, the –SENSE pin (pin 9)
should be connected through a separate conductor to the return
terminal of the load.
tion frequency if there is.
The SYNC OUT signal is avonly whe DC input volt-
age is above approxately 1when e converter is not
inhibited through the ENA1 pin. At through the ENA2 pin
will not turn the NC OUT signal of
NOTE: An MQerter that as its SYNC IN pin driven by
the SYNC UT pin ond MFL convee its start
of its switching cycle dpproximately 180 dve
to tt of the second conr.
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 regu-
lation 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.
Fighows the euivalent cirit looto the SYNC IN
pin. C shos the equivnt circuking to the
SYNC
5V
Inside the converter, +SENSE is connected to +Vout wit
tor value from 100W to 274W, depending on output voltage, and
–SENSE is connected to OUTPUT RETURN with a 10W resistor.
5K
It is also important to note that when remote sed, the
voltage across the converter’s output terminals (p8)
will be higher than the converter’s nominal output volta
resistive drops along the connecting ws. This higer voltag
the terminals produces a greater voltage tress on the converter’s
internal components and may cathe converter to faito deliver
the desired output voltage and of the inpvoltage
range at the higher end of the lt and temperatur
range. Please consult the factory for det
TO SYNC
CIRCUITRY
IN 6
SYNC IN
TN
K
PIN 2
Figure B: Equivalent ircuit looking into the SYNC IN pin with
respect to the IRTN (input return) pin.
SYNCHRONIZATON: FL converter’s switfre-
quency can be onized external frequency e
that is in the 500 700 kange. A pulse train a
desired frequency shoapplieto the SYIN pin (pin 6
with respt to the INPUT N (pin 2). Thitrain should
have a e in the 2080% range. Its lue shou
be below 0guaranted to be ireted as c low
and its hih value above 2.0V guarantbe
interpreted as a ogigh. The ttion te between ttwo
states should be less than 300ns.
5V
5K
SYNC OUT
FROM SYNC
CIRCUITRY
PIN 5
IN RTN
PIN 2
OPEN COLLECTOR
OUTPUT
If the MQFL coerter is not to be synchrothe YNC IN pin
should be left open circt. The converter wn operate in its
free-running mode auency of approximtely 550 kHz.
Figure C: Equivalent circuit looking into SYNC OUT pin with
respect to the IN RTN (input return) pin.
If, due to a fault, the SYNC n is helin either a logic low or
logic high state cously, QFL converter will revert to its
free-runninequen
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 cr also has a SYNC OUT pin (pin 5). This
output can be udrive the SYNC IN pins of as many as ten
(10) other MQFL cors. The pulse train coming out of SYNC
OUT has a duty cycle f 50% and a frequency that matches the
switching frequency of the converter with which it is associated.
This frequency is either the free-running frequency if there is no
Product # MQFL-28E-7R5S
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Doc.# 005-0005157 Rev. 1
04/30/09
Page 10
MQFL-28E-7R5S
16A
Curren
Technical Specification
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.
100,000
10,000
1,00
100
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.
.00
0.1
0.30
0.45
0.7
0.90
IncreaVout (V)
igure E: Output Voltage aph
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 p operation
at light loads. Consult factory for details.
As the tput voltais trimmed uoduces a greater voltage
stress on the coninternal comts and may cause the
converter to fto dthe desired output voltage at the low
nd of the input voltagge at the higher end of the load
current d temperature rPlease consult the factory for
details. y trimmed conters are available by request.
OUTPUT VOLTAGE TRIM: If desired, it is possible to
the MQFL converter’s output voltage ave its nominal value.
do this, use the +SENSE pin (pin 10) for tis trim funcon instead
of for its normal remote sense ftion, ashown in igure D.
In this case, a resistor conneNSE pin to the –SENSE
pin (which should still be connectetput return, eithe
remotely or locally). The value of the istor should be
chosen according to the equation or om Figur:
NPUT UNDETAGE LOCKOUT: The MQFL converter
haan under-voltackout feature that ensures the converter
will be off if the input voltage is too low. The threshold of
input voltage awhich the converter will turn on is higher that
e threshod at which it will turn off. In addition, the MQFL
erter wl not respond to a state of the input voltage unless
iemained in that state for more than about 200µs. This
hysteresis and the delay ensure proper operation when the source
impedance is high or in a noisy environment.
Rtrim =
out – V– 0.025
where:
Vnoconverter’s nl output voltag
Vout = d output tage (greater than Vand
Rtrim is in O
NPUT OVER-VOLTAGE SHUTDOWN: The MQFL converter
also has an over-voltage feature that ensures the converter will be
off if the input voltage is too high. It also has a hysteresis and
time delay to ensure proper operation.
12
VIN
ENA 2
2
11
N RTN
SHARE
3
10
CASE
+ SNS
Rtrim
4
5
6
9
+
–
28 Vd
ENA 1
– SNS
–
8
7
SYNC OUT
SYNC IN
OUT RTN
+VOUT
open
ans
Load
+
Figure D: Typical connection for output voltage trimming.
Product # MQFL-28E-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005157 Rev. 1
04/30/09
Page 11
MQFL-28E-7R5S
16A
Curren
Technical Specification
The Mil-HDBK-1547A component guideline calls for a
maximum component temperare of Figure 5 therefore
has one power derating at enis limit is main-
tained. It has been SynQor’s ve expnce that reliable
long-term converter otion cahievewith a maximum
component temperature of 125ºC. Ie cases, a maximum
temperature of C is ermissible, not recoended for
long-term operaere high rliability is required. Derating
curves for hese himperatulimits are included in
Figure 5. Thmaximutemerature at wrter
shoulbe operated is 13
BACK-DRIVE CURRENT LIMIT: Converters that use MOSFETs
as synchronous rectifiers are capable of drawing a negative current
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”.
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 con-
verters 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.
Whconverter imounted on a mete, the plate will
help the convrter’s case tom a temprature.
How wes so depends on tickness e plate and
on the thernductance f the ie laye.g. thermal
rease, thermal pad, etc.) n the cd the late. Unless
one very well, it is int not to stake the plate’s
tee for the maximum cmperature. It is easy for
them to be as mu5-10ºC differfull power and at high
temperatures. t is sted that a trmocouple be attached
ectly to the convertee through a small hole in the plate
when investigating how hconverter is getting. Care must
also be to ensure that this not a large thermal resistance
between thocouple and the case due to whatever adhe-
sive might be uold the thermocouple in place.
To avoid any problems that might arise due to back-drive cu
the MQFL converters limit the negative current that the c
can draw from its output terminals. The threshold for this back-
drive current limit is placed sufficiently below zero so that the con-
verter may operate properly down to zero load, its absolute
value (see the Electrical Characteristics page) is pared
to the converter’s rated output current.
THERMAL CONSIDERATIONS: Fig5 shows the sugges
Power Derating Curves for this converteas a funcon of the
case temperature, input voltage athe maximum desird power
MOSFET junction temperaturecomponents wthin the
converter are cooler than the hottest
INPUT SYSTEM ISTABILITY: This condition can occur
because any DC/DC converter appears incrementally as a
egative resistace load. A detailed application note titled
put System Instability” is available on the SynQor website
provides an understanding of why this instability arises,
and ws the preferred solution for correcting it.
.
Product # MQFL-28E-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005157 Rev. 1
04/30/09
Page 12
MQFL-28E-7R5S
16A
Curren
Technical Specification
CONSTRUCTION AND ENVIRONMENTAL STRESS SCREENING OPTIONS
ES-Grade
(-55 ºC to +125 ºC)
(Element Evalution)
H
5 ºC to ºC)
nt Evtion)
Consistent with
MIL-STD-883F
C-Grade
(-40 ºC to +100 ºC)
Screening
Internal Visual
Yes
No
Yes
*
B
(-55 ºC tC)
Codition C
5 ºC to +15C)
Temperature Cycle
Method 1010
Constant
Acceleration
Method 2001
(Y1 Direction)
Condition
(5000g)
No
500g
Method 1015
Load Cycled
Burn-in
• 10s period
24 Hrs @ 25 ºC
rs @ +15 ºC
1rs @ +
• 2s @ 100% Load
• 8s @ 0% Load
Method 5005
(Group A)
Final Electrical Test
-45, +25, +10ºC
FQo
5, +25, +ºC
FQorSeal
Mechanical Seal,
Thermal, and Coating
Process
Full QorSeal
External Visual
2009
Yes
Yes
Construction Process
QorSeal
Q
QorSeal
* Per IPC-A-6(Rev. D) Class 3
MilQor converters and filtoffered in four variatiof conn technue and environmental stress screening options. The
three highest gra, ES, all use SynQor’s prry QorHi-Rel assembly process that includes a Parylene-C coating
of the circuit, a hiormanrmal compound filler, nickel barrier gold plated aluminum case. Each successively higher
grade has more strinchanil and eleccal testing, aas a longer burn-in cycle. The ES- and HB-Grades are also con-
structed components e been procuough an elemaluation process that pre-qualifies each new batch of devices.
Product # MQFL-28E-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005157 Rev. 1
04/30/09
Page 13
MQFL-28E-7R5S
16A
Curren
Technical Specification
0.093
[2.36]
[6.35]
+VIN
ENA 2
1
12
IN RTN
SHARE
2
11
1.50 [38.10]
0.28]
TYP. ON-CUM.
CASE
+SNS
-SNS
3
10 1.260
MQFL-28E-7R5S-X-HB
DC/DC CONVERTER
28Vin 7.5Vout @ 16A
[32.00]
ENA 1
4
9
8
7
MADE IN USA
OUT RTN
+VOUT
SYNC OUT
SYNC IN
5
6
0.040 [1.02]
PIN
S/N 0000000 D/C 3205-301 CAGE 1WX10
2.50 [63.50]
2.76 [70.10]
3.00 [76.20]
50 [1.2
0.59]
25]
2.96 [75.2]
8 [5.79]
0.390 [9]
CX
0.093
[2.36]
0.250 [6.35]
+VIN
ENA 2
1
12
11
0.200 [5.08]
TYP. NON-CUM.
IN RTN
CASE
RE
2
3
4
5
6
1.50 [38.10]
+SNS
-SNS
MQFL-28
DC/DC CONVERTER
28Vin 7.5Vout @ 16A
10 1.260
[32.00]
ENA 1
7
OUN
SYNC OUT
MADE IN USA
0.040 [1.02]
PIN
S/N 0205-301 CAGE 1WX10
0.42
[10.7]
2.50 3.50]
76 [70.10]
00 [76.20]
0.050 [1.27]
0.220 [5.59]
0.128 [3.25]
2.80 [71.1
Case U
0.390 [9.91]
NOTES
PIN DESIGNATIONS
1)
2)
Pins 0.040” (1.02mm) r
Pin Function
1 Positive input
2 Input return
3 CASE
Pin Function
7 Positive output
8 Output return
9 - Sense
Pins Materialr
Finish: ld oveel plate
3)
All dimin inhes (mm) Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/n. (x.xx +/-0.25mm)
4)
5)
6)
Weight: 2.8 og) typical
4 Enable 1
10 + Sense
Workmanship: Mer exceeds IPC-A-610C Class III
Print Labeling on Top Surface per Product Label Format Drawing
5 Sync output
6 Sync input
11 Share
12 Enable 2
Product # MQFL-28E-7R5S
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04/30/09
Page 14
MQFL-28E-7R5S
16A
Curren
Technical Specification
0.300 [7.62]
0.140 [3.56]
1.15 [29.21]
0.250 [6.35]
0.250 [6.35]
TYP
1
2
3
4
5
6
+VIN
12
ENA 2
2.00
[50.80]
IN RTN
CASE
SHARE
+SNS
11
10
9
05.08]
MQFL-28E-7R5S-Y-HB
DC/DC CONVERTER
28Vin 7.5Vout @ 16A
1.50
[38.10]
-SNS
ENA 1
NO
OUT RTN
+VOUT
SYNC OUT
SYNC IN
MADE IN USA
8
1.750
[44.]
S/N 0000000 D/C 3205-301 CAGE 1WX10
7
0.040
[1.02]
PIN
0.050 [1.27]
0.220 [5.5
1.750 [44.45]
2.50 [63.50]
0.375 [9.52]
2.96 [75.2]
0.2
0.390 [9.91]
e Y
Ca
(variant oY)
Case W
(variant of Y)
0.250 [6
0.250 [6.35]
0.200 [5.08]
[5.08]
TYP. NON-CUM.
NON-CUM.
0.040 [1.02]
PIN
0.040 [1.02]
PIN
0.420 [10.7]
0.050 [1.27]
0.220 [5.59]
0.22
0.050
0.36 [9
2.80 [71.1]
0.525 [13.33]
0.390
[9.91]
0.390
[9.91]
0.525
2.80 [71.1]
PIN DESIGNATIONS
NOTES
1)
Pins 0.00” (1.diame
Pin Function
Pin Function
2)
Pins l: Cop
1 Positive input
2 Input return
3 CASE
4 Enable 1
5 Sync output
6 Sync input
7 Positive output
8 Output return
9 - Sense
10 + Sense
11 Share
Finish: er Nkel plate
All dimensinches (mm) Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.0.xx +/-0.25mm)
Weight: 2.8 oz (7typical
Workmanship: Meeor exceeds IPC-A-610C Class III
Print Labeling on Top Surface per Product Label Format Drawing
3)
4)
5)
6)
12 Enable 2
Product # MQFL-28E-7R5S
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Doc.# 005-0005157 Rev. 1
04/30/09
Page 15
MQFL-28E-7R5S
16A
Curren
Technical Specification
MilQor Converter FAMILY MATRIX
The tables below show the array of MQFL converters available. When ordering SynQor rs, plesure that you use
the complete part number according to the table in the last page. Contact the factory for otheement
Single Output
Dual Output †
28V
1.5V
1.8V
2.5V
3.3V
5V
6V
7.5V
9V
(
15V
5S)
V
05D)
±12V
(12D)
±15V
15D)
Full Size
(1R5S) (1R8S) (2R5S) (3R3S) (05S)
(06S) (7R5S) (09S)
28S
MQFL-28
16-40Vin Cont.
24A
Total
8A
40A
40A
40A
40A
40A
40A
40A
40A
40A
40A
40A
40A
40A
40A
40A
30A
30A
30A
30A
24A
24A
20A
20A
20A
20A
17A
17A
20A
16A
16A
1A
A
1
A
11
13A
10A
10A
8A
4A
4A
16-50Vin 1s Trans.*
Absolute Max Vin = 60V
MQFL-28E
16-70Vin Cont.
16-80Vin 1s Trans.*
Absolute Max Vin =100V
T
10A
otal
8A
Total
MQFL-28V
16-40Vin Cont.
5.5-50Vin 1s Trans.*
Absolute Max Vin = 60V
0A
Tot
6.5A
Total
6.5A
6
3.3A
3
4A
MQFL-28VE
16-70Vin Cont.
5.5-80Vin 1s Trans.*
Absolute Max Vin = 100V
20A
Total
8A
Total
6.5A
Total
8A
MQFL-270
155-400Vin Cont.
155-475Vin 0.1s Trans.*
Absolute Max Vin = 550V
24A
Total
10A
Total
8A
Total
A
Output
Dual Output †
8V
1.5V
1.8V
2V
3.3V
5
7.5V
9
15V
(15S)
±5V
(05D)
±12V
(12D)
±15V
(15D)
Half Size
(1R5S) (1R8S) (2R5) (3R3S) 05S)
(06S) (7R5S) (09S)
(28S)
MQHL-28 (50W)
16-40Vin Cont.
16-50Vin 1s Trans.*
Absolute Max Vin = 60V
10A
Total
4A
Total
3.3A
Total
20A
0A
A
20A
15A
1
10A
8A
8A
6.6A
A
5.5A
5.5A
A
4A
3A
3.3A
1.8A
1.8A
MQHL-28E (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
10
0A
10A
10A
7.5A
7.5
5A
4
3.3A
3.3A
2.75A
2.75A
2A
2A
1.65A
1.65A
0.9A
0.9A
MQHR(25W)
16-70V
16-80Vin
Absolute Max
5A
Total
2A
Total
1.65A
Total
Check witfactobility.
Product # MQFL-28E-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005157 Rev. 1
04/30/09
Page 16
MQFL-28E-7R5S
16A
Curren
Technical Specification
PART NUMBERING SYSTEM
The part numbering system for SynQor’s MilQor DC-DC converters follows the format shown ithe taw.
Output Voltage(s)
Input
Model
Name
Package Outline/
Pin Configurion
Sng
Gr
Voltage
Range
Single
Output
Dual
Output
1R5S
1R8S
2R5S
3R3S
05S
06S
7R5S
09S
28
28E
28V
28VE
U
W
Z
C
H
MQFL
MQHL
MQHR
05D
12D
1
270
12S
15S
28S
Example:
MQFL-28E-7R5S
APPLICATION NOTES
A variety of application notes and twhite papers cae downloaded ipdf format from the SynQor website.
PATENTS
SynQor holds the folloatents, one or of which migly to this product:
5,999,
6,927,987
,222,742
,309
6,545,890
7,072
609
7,08
,594,159
7,119,524
6,731,520
7,269,034
6,894,468
7,272,021
6,896,526
7,272,023
Contact SynQor further information:
Phone:
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 : 887-9596
x:
978-849-0602
il:
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.
Addre155 Swanson Road
Boxborough, MA 01719
USA
Product # MQFL-28E-7R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005157 Rev. 1
04/30/09
Page 17
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