MQFL-28V-1R5S [SYNQOR]
HIGH RELIABILITY DC-DC CONVERTER; 高可靠性DC-DC转换器
| 型号： | MQFL-28V-1R5S |
| 厂家： | 
SYNQOR WORLDWIDE HEADQUARTERS |
| 描述： | HIGH RELIABILITY DC-DC CONVERTER |
| 文件： | 总19页 (文件大小：1268K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MQFL-28V-1R5S
Single Output
HI G H RELIABILITY DC-DC CONVERTER
16-40V
5.5-50V
1.5V
40A
84% @ / 81% @ 40A
Continuous Input
Transient Input
Output
Output
Efy
FU L L PO W E R OP E R A T I O N : -55ºC TO +12C
®
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 comp
derating guidelines. They are designed and manufacture
to comply with a wide range of military standards.
-HB
-1
ꢂ
R
ꢁ
V
4
V
DC/D
28Vin
@
t
Meets all -704 and -1275B under-voltnsients
Design Process
MQFL series converters are:
• Designed for reliability per N-P3641-A guideli
F
& MA N U F A C T U R E D IN T H E USA
E O R -REL S S E M B L Y
EAL™ H
Q
S
I
A
• Designed with components der
— MIL-HDBK-1547A
Features
— NAVSO P-3641A
ixed sitching frequency
• pto-isolators
• Parallel operation with current share
Remote sense
• Clock synchronization
• Primary and secondary referenced enable
Qualificatiocess
MQFL series converters alifieto:
• MIL-STF
— coith RTCA/0-160E
• SynQor’s FirQualification
• Continuous short circuit and overload protection
• Input under-voltage lockout/over-voltage shutdown
— consistent STD-883
• SynQor’s Long-Term Storage Surlity Qtion
• SynQor’s on-oing life test
Specification Compliance
In-Line Manufring 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 9001certifiefacility
• Full component ability
• Temperacyclin
• DEF-STAN 61-5 (part 6)/5
• MIL-STD-461 (C, D, E)
• RTCA/DO-160E Section 22
• Constant aation
• 24, 96, 160 hurn-in
• Three level tempescreening
Product # MQFL-28V-1R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005187 Rev. 1 04/21/09
Page 1
MQFL-28V-1R5S
Curre
40A
ꢂechnical Specification
BLOCK DIAGRAM
BOOST
REGULATION STAGE
ISOLATE
CONVERTER
SWITCHES
AND
7
+Vout
CURRENT
SENSE
1
+Vin
CONTROL
2
8
INPUT
RETURN
OUTPUT
RETURN
CASE
GATE DRIVERS
GATE DR
3
STABILITY
CURRENT
LIMIT
12
UVLO
ENABLE 2
4
MAGNETIC
ENABLE 1
11
PRIMARY
CONTROL
NDARY
OL
SHARE
5
SYNC OUT
LING
10
+ SENSE
6
SYNC IN
9
SENSE
BIAS POWER
CONTRO
POWER
TYPICAL COCTIODIAGRAM
12
11
10
9
IN
ENA 2
open
means
on
nal bulk caacitor
2
4
5
6
IRTN
SHARE
+ SNS
STABILITY
ENA 1
+
-
MQFL
RSTBILITY
ABILITY
+
-
Load
28 Vdc
- SNS
open
means
on
8
SYNC OUT
SYNC IN
OUT RTN
+VOUT
7
Product # MQFL-28V-1R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005187 Rev. 1 04/21/09
Page 2
MQFL-28V-1R5S
Curre
40A
ꢂechnical Specification
MQFL-28V-1R5S ELECTRICAL CHARACTERISTICS
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 othified
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
60
60
-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
28
28
40
50
V
V
ntinuous
1, 2, 3
4, 5, 6
5.5
ient, 1s; see Under-Voltage ransiee
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
te 3
14.75 15.50 16.00
13.80 14.40 15.00
0.50
V
V
, 2, 3
1, 2, 3
1, 2, 3
1.10
0
See Note 3
54.0
50.0
2.0
56.8
51.4
5.3
54.0
8.0
8
160
5
V
A
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; I0A
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 to
Operating Output Current Range
Operating Output Power
Output DC Current-Limit Ince
Short Circuit Output ent
Back-Drive Curreile Ena
Back-Drive Current LiDisabl
Maximum Output Capac
DYNAMICHARACTERI
Output Deviation Loant
For a hange in Lourrent
For a Negge in Lod Current
Settling Time )
Output Voltge Dee Transien
For a Pos. tep Chanin Line Vo
For a Neg. Sep Change in Line Volta
Settling Time either case)
Turn-On Transien
10
8
Vin = 16V, 8V, 50
Vin = 16V, 28V, 50V
Bawidth = 100kHz – see Figure 14
0
1.48
1.47
-20
3
.50
150
0
7
1.50
15
1.
1.53
20
V
V
m
mV
V
mV
A
A
Vout leads
1
2, 3
"
" ; Vin = 0V; Iout=40A
" ; Vout@(Io) - Vout@(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
1.54
50
Bandwidth = 10MHz; CL=11µF
41
41
40
60
46
47
13
10
52
See Noe 4
out ≤ 1.2V
10,00
mA
F
See Note 6
-450
35
mV
mV
µs
Total Iout step = 20A‹-›40A, 4A‹-›20A; CL=11µF
4, 5, 6
4, 5, 6
4, 5, 6
450
"
See Note 7
Vin step = 16V‹-›50V; CL=11µF; see Note 8
-20
200
200
500
mV
mV
µs
"
"
4, 5, 6
4, 5, 6
See Note 5
0
See Note 7
Output Voltage Rise Tim
Output Voltage Overs
Turn-On Delay, Risin
6
0
5.5
3.0
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 E
Turn-On Delay, Rising ENA
EFFICIENCY
Iout = 40A (6Vin)
TBD
TBD
TBD
TBD
TBD
TBD
82
85
81
84
80
82
16
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 = 20A n)
Iout = 40A
Iout = 20A (2
Iout = 40A (40Vi
Iout = 20A (40Vin)
Load Fault Power Dissi
Short Circuit Power Disstion
TBD
TBD
Iout at current limit inception point; See Note 4
Vout ≤ 1.2V
Product # MQFL-28V-1R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005187 Rev. 1 04/21/09
Page 3
MQFL-28V-1R5S
Curre
40A
ꢂechnical 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
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, 2, 3
3
Logic Level High
Logic Level Low
Duty Cycle
See N
Synchronization Output
Pull Down Current
Duty Cycle
20
25
mA
%
C OUT = 0.8
connected o SYNC IN of er MQF
See Note 5
Seote 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
0.8
V
µA
1, 2, 3
See Note 5
1, 2, 3
See Note 5
1, 2, 3
80
2
Current drain required ure mooff
4.5
ax drawn from n allowdule on
igure 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
60
18.0
0
18.8
740
V
kHz
1, 2, 3
1, 2, 3
1, 2, 3
Vin = 16V; out =
78
80
80
%
%
%
1, 2, 3
1, 2, 3
1, 2, 3
Iout = 15A (16Vin)
Iout = 30A (16Vin)
RELIABILITY CHARACTERISTICS
Calculated MTBF (MIL-STD-217F2)
GB @ Tcase = 70ºC
3
220
390
TBD
10 Hrs
3
AIF @ Tcase = 70ºC
10 Hrs.
3
Demonstrated MTBF
0 Hrs.
WEIGHT CHARACTERISTICS
Device Weight
79
Electrical Characterists Note
1. Converter will unnput oge shutdown.
2. Derate output po% of rwer at Tcase = 135ºC (re 5).
3. High or low state of tage mersist for about 200µs to on by the lockout or shutdown circuitry.
4. Current limit inception d as thpoint where output voltagropped to 90% of its nominal value.
5. Parametnot tested but ed to the limit d.
6. Load ansition time
7. Settlinured from sof transient to the pere the tput voltage has returned to ±50mV of its final value.
8. Line voltagime ≥ 100µs.
9. Input voage ri0µs.
10. Operating the cnvat a synchation fuency above free running frequency will cause the converter’s efficiency to be slightly reduced
and it may also cause a ight reductiomaxput current/power available. For more information consult the factory.
11. SHARE pin otputs a power fure warlse dufault condition. See Current Share section of the Control Features description.
12. After a disablr fault event, odule is ifrom tarting for 300ms. See Shut Down section of the Control Features description.
13. Only the ES and HB grade products are testree temperatures. The C grade products are tested at one temperature. Please refer to the
Construction and Environtal Stress Screening s table for details.
14. These derating curvfor the ES- and HB- rade products. The C- grade product has a maximum case temperature of 100ºC and a maximum
junction temperature rise obove Tcas.
Product # MQFL-28V-1R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005187 Rev. 1 04/21/09
Page 4
MQFL-28V-1R5S
Curre
40A
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
Time (s)
Under-Voltage Transient Profiwing when the bst-converts guaranteed tperational. The boost-converter must
first be armed by having V > ew under-voltage ansient can occur after a delay equal to four times the duration
IN
of the previous transient if the booster is rearmed.
Note:
This Under-Voltage TrProile is desto comply (wpropiate margins) with all initial-engagement surges, start-
ing or voltage trnts and under-e surgespcified in:
• MIL-8 (A through
• TCA/DO0E
• MI-STD-1275B
• DEFSTAN 61-5 (part 6)/5 (tionportions)
Product # MQFL-28V-1R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005187 Rev. 1 04/21/09
Page 5
MQFL-28V-1R5S
Curre
40A
ꢂechnical Specification
TBD
TB
Figure 1: Efficiency at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at Tcase=25°C.
Figfficiency at ominal outpuoltag% rated power vs.
case ure for inut voltage of , 28V, a
TBD
D
Figure 3: Power dissipation l output voltage vs. load rent
for minimum, nomid maxiut voltage at Tcase=2
ure 4: Power dissipation at nominal output voltage and 60% rated
vs. case temperature for input voltage of 16V, 28V, and 40V.
TBD
TBD
Figure 5: Outpent / Output Power derating curve as a function
of Tcase and the Mdesired power MOSFET junction temperature
at Vin = 28V (see Not
Figure 6: Output voltage vs. load current showing typical current limit
curves.
Product # MQFL-28V-1R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005187 Rev. 1 04/21/09
Page 6
MQFL-28V-1R5S
Curre
40A
ꢂechnical Specification
TBD
Figure 7: Turn-on transient at full resistive load and zero output
capacitance initiated by ENA1. Input voltage pre-applied.
Ch 1: Vout (500mV/div). Ch 2: ENA1 (5V/div).
Fig8: Turn-on transient aull resistivand 10mF output
capce initiated bENA1. Input oltagplied.
Ch 100mV/divCh 2: ENA1 V/div).
D
TBD
Figure 9: Turn-on transient ative load and zero outp
capacitance initiateNA2. tage pre-applied.
Ch 1: Vout (500mV/2: EN/div).
re 10: Trn-on transient at full resistive load and zero output
ance initiated by Vin. ENA1 and ENA2 both previously high.
Ch 1: Vout (500mV/div). Ch 2: Vin (10V/div).
TBD
TBD
Figure 11: Outage response to step-change in load current 50%-
100%-50% of IouLoad cap: 1µF ceramic cap and 10µF, 100mΩ
ESR tantalum cap. Ct (200mV/div). Ch 2: Iout (20A/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 (200mV/div). Ch 2: Iout (20A/div).
Product # MQFL-28V-1R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005187 Rev. 1 04/21/09
Page 7
MQFL-28V-1R5S
Curre
40A
ꢂechnical Specification
See Fig. 16
See Fig. 15
iC
MQME
Filter
MQFL
erter
TBD
VOUT
VSOURCE
10µF,
1µF
ceramic
100m
ESR
W
capacitor
capacitor
Figure 13: Output voltage response to step-change in input voltage
(16V - 50V - 16V). Load cap: 10µF, 100mΩ ESR tantalum cap and 1µF
ceramic cap. Ch 1: Vout (200mV/div). Ch 2: Vin (20V/div).
Fi14: Test set-up diagrashowing ment points for Input
Teripple Curre(Figure 15) d Outage Ripple
(Fig
TBD
D
Figure 15: Input termnal cure, ic, at full rated outpurent
and nominal input with MQ filter module (50
Bandwidth: 20MHzure 14
re 16: Otput voltage ripple, Vout, at nominal input voltage and rated
rrent (20mV/div). Load capacitance: 1µF ceramic capacitor
and 10µF tantalum capacitor. Bandwidth: 10MHz. See Figure 14.
TBD
TBD
Figure 17: Rise ut voltage after the removal of a short circuit
across the output ts. Ch 1: Vout (500mV/div).
Ch 2: Iout (20A/div).
Figure 18: SYNC OUT vs. time, driving SYNC IN of a second SynQor
MQFL converter. Ch1: SYNC OUT: (1V/div).
Product # MQFL-28V-1R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005187 Rev. 1 04/21/09
Page 8
MQFL-28V-1R5S
Curre
40A
ꢂechnical Specification
TBD
Figure 19: Magnitude of incremental output impedance
(Zout = vout/iout) for minimum, nominal, and maximum input voltage
at full rated power.
Fi20: Magnitude of incmental forwnsmission
(FT /vin) for minmum, nominaand minput voltage
at fuower.
D
TBD
Figure 21: Magnitude of increverse transmission
(RT = iin/iout) for m, nod maximum input volt
at full rated power.
re 22: Magnitude of incremental input impedance
vin/iin) for minimum, nominal, and maximum input voltage
at full rated power.
TBD
TBD
Figure 23: Higncy conducted emissions of standalone
MQFL-28-05S, 5Vule at 120W output, as measured with
Method CE102. Limiown is the ‘Basic Curve’for all
applications with a 28V urce.
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-1R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005187 Rev. 1 04/21/09
Page 9
MQFL-28V-1R5S
Curre
40A
ꢂechnical Specification
CONSTRUCTION AND ENVIRONMENTAL STRESS SCREENING OPTIONS
ꢁS-Grade
(-55 ºC to +125 ºC)
(ꢁlement ꢁvaluation)
HB-Grade
(+125 ºC)
(ꢁlemation)
Consistent with
MIL-SꢂD-883F
C-Grade
(-40 ºC to +100 ºC)
Screening
Internal Visual
Yes
ꢀo
Yes
Ye
*
Condition
(-55 ºC to +125 ºC)
ition
(-6150 ºC)
ꢂemperature Cycle
Method 1010
Constant
Acceleration
Method 2001
(Y1 Direction)
Conion A
(5000g)
ꢀo
Method 1015
Load Cycled
Burn-in
• 10s period
24 Hrs @ +125 ºC
96 Hrs @ +125 ºC
160 Hrs @ +125 ºC
• 2s @ 100% Load
• 8s @ 0% Load
Method 5005
(Group A)
Final ꢁlectrical ꢂest
+25 ºC
, +100 ºC
Full QorSe
-5, +125 º
ull QorSeal
Mechanical Seal,
ꢂhermal, and Coating
Process
Full
ꢁxternal Visual
2009
es
es
*
Construction Process
QorSeal
QorSeal
* Per IPC-A-10 (Rev. D) Class
MilQor converters and filters are ur variations of cotruction technique and environmental stress screening options. The
three highest grades, C, ES, and HB, all or’s proprietary rSeal™ Hi-Rel asmbly process that includes a Parylene-C coating
of the circuit, a high pere thermal cond filler, and a barrier gld plated aluminum case. Each successively higher
grade has more strigent mal and electrical testis well onger urn-in cycle. The ES- and HB-Grades are also con-
structed of compohat haprocured through aent evn process that pre-qualifies each new batch of devices.
Product # MQFL-28V-1R5S
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-005-0005187 Rev. 1 04/21/09
Page 10
MQFL-28V-1R5S
Curre
40A
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 required
depends on the application (source inductance, load powerrate
of fall of the source voltage, etc). Please consult the f
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 the ENA2 pin. A higher input
standby current therefore results ier case.
Both enable pins are inpulleso that an open
connection on both pins will the coer. Figure A shows
the equivalent circuooking her eble pins. It is TTL
compatible.
SHUT DOWMQconverter ill shut down in response
5.6V
82
1N4148
P
(or PI
ENALE
TO NABLE
CIRCUITRY
904
Because input system stability is harder to maintain as the
input voltage gets lower, the MQFL-28V seriverters are
designed to give external access to the voltage nen the
boost-converter and the pre-regulator stages. This ace
“STABILITY” pin (pin 3), permits the useto add a tabiliz
capacitor with series resistance to this nde. Since te voltagat
this node stays above 16V, the ount ocapacitane required
is much less than would be reqn the converter’s put pins
where the voltage might drop as V. It is recommende
that a 22µF capacitor with an ESR o1W be connecte
between the STABILITY and the INPTURN pin (pin
2). Without this special cn to the internal nof the
converter, a 300bilizincapacitor would haen
required across thrter’s ipins.
PIN 2
r PIN 8)
IN
Figurquivalent circuit g into either the ENA1 or ENA2
pins witto its correspnding return pin.
only four codENA1 input low, ENA2 input low, VIN
input below under-vtage lockout threshold, or VIN input above
over-voltage shutdown threshold. Following a shutdown event,
there is a starp inhibit delay which will prevent the converter
m restarng for approximately 300ms. After the 300ms delay
es, 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
nge, there is no startup inhibit, and the output voltage will rise
according to the “Turn-On Delay, Rising Vin” specification.
Another advantage of ABILY pin is it provides a
voltage e that stays 16V when tder-voltage
transient his voltagsource might be uor oth
circuitry in the
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 converter has two e pis. Both must
have a logic high leveor the converter to nabled. A logic
low on either pin will the converter.
The ENA1 pin (4) is refd with espect to the converter’s
input return (pin e ENA(pin 12) is referenced with
respect to conve’s output return (pin 8). This permits the
converter to hibid 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 wpin is used to inhibit the converter, the
regulation and the ion stages are turned off. However,
Product # MQFL-28V-1R5S
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Doc.# 005-005-0005187 Rev. 1 04/21/09
Page 11
MQFL-28V-1R5S
Curre
40A
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 IN
IRTN
Figure BEquivauit lookinto the SYN pin with
respecto IN RTetur) 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 signals. A
pulse train at the desired frequency should be applied to the
IN pin (pin 6) with respect to the INPUT RETURN (pin 2). Th
train should have a duty cycle in the 20% to 80% range. Its low
value should be below 0.8V to be guaranteed to be interpreted
as a logic low, and its high value should be a2.0V to be
guaranteed to be interpreted as a logic high. Ton time
between the two states should be less than 300ns.
5V
K
C OU
FROM S
CIRCUITRY
PIN 5
IN RTN
PIN 2
EN COLLECTO
OUTPUT
Figure C: Equivalent ciroking into SYNC OUT pin with
respeche IN RTN (inpu) pin.
If the MQFL converter is not to be synconized, the SYNC IN n
should be left open circuit. The converter will then oerate in its
free-running mode at a frequencapproimately 55kHz.
CURRENT E: When several MQFL converters are placed
in parallel to aeither a higher total load power or N+1
redundancy, their ARE pins (pin 11) should be connected
together. The voltage on this common SHARE node represents the
average currendelivered by all of the paralleled converters. Each
onverter monitors this average value and adjusts itself so that its
ut currnt closely matches that of the average.
If, due to a fault, the SYNC IN pieither a logic lo
or logic high state continuously, the Mverter will reve
to its free-running frequ
The MQFL convlso haNC OUT pin (pin is
output can be useive the NC IN pins of as man
ten (10) other MQFrters. he pulse in coming o
of SYNC UT has a de of 50% anequency that
matchitching freqy of the converth which it
is associatequency is either tee-runniquenc
if there is no syion signal at thNC IN the
synchroniztion reqcy 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
e 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 signal is avable oen thage at the
STABILITY pin in 3) is above approy 1and when
the converter is not inhited through the pin. An inhibit
through the ENA2 pnot turn the SYNC OUT signal off.
NOTE: An MQFL converthas its SYNC IN pin driven by
the SYNC OUT f a seMQFL converter will have its
start of its itchincle delaapproximately 180 degrees
relative to f the econd 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 equivalent circuit looking into the SYNC
IN pin. Figure C the equivalent circuit looking into the
SYNC OUT pin.
Product # MQFL-28V-1R5S
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Page 12
MQFL-28V-1R5S
Curre
40A
ꢂechnical Specification
100,000
10,000
1,000
100
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:
Vout - Vnom - 0.025
407.5
Rtrim =
where:
Vnom = the converter’s nominal output voltage,
Vout = the desired output voltage (greater than Vnom), and
Rtrim is in Ohms.
0.00
0.03
0.09
0.12
0.1
Increase
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 at the
low end of the input voltage range at the higher end of th
current and temperature range. Please consult the factory
details. Factory trimmed converters are available by request.
Figutput Volge Trim Gra
INPUT OVER-VOLTAGUTDOThe MFL converter
as an over-voltage feaat ense converter will be
nput voltage itoo hilso has a hysteresis and time
delay to ensure per operation.
INPUT UNDER-VOLTAGE LOCKOUT: The Monverter has
an under-voltage lockout feature that ensures the will be
off if the input voltage is too low. This lockout only apn
the boost-converter is not operating. The hreshold of input
at which the converter will turn on is hiher that the thresholt
which it will turn off. In additionthe MQFL converer will not
respond to a state of the input e unles it has reined in
BACK-DRIVE CURLIMIT: Conrters that use MOSFETs as
ynchronous rectfiers aable of drawing a negative current
from thoad if the load is rce of short- or long-term energy.
This neurrent is referrto as a “back-drive current”.
Conditions whedrive current might occur include paralleled
coverters that do nploy 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
aving diffrent output voltages are connected together through
that state for more than about 20ysteresis and the delay
ensure proper operation when the souance is high or i
a noisy environment.
12
+VIN
ENA 2
3
4
5
6
11
ernal bulk capacit
RSTABIL
RTN
SHARE
10
STABILITY
ENA 1
+SNS
+
28 Vdc
RTRIM
MQFL
9
-SNS
8
ms
n
SYNC OUT
SYNC IN
OUT RTN
Load
7
+VOUT
CSTABILI
+
Figure D: Typical cn for output voltage trimming.
Product # MQFL-28V-1R5S
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Page 13
MQFL-28V-1R5S
Curre
40A
ꢂechnical Specification
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.
When the converter is mounted on a metal plate, the plate will
help to make the converter’s case bottom a uniform temperature.
How well it does so depends on the thickness of the plate and
on the thermal conductance of tace layer (e.g. thermal
grease, thermal pad, etc.) beeen thnd the plate. Unless
this is done very well, it rtant nmistake the plate’s
temperature for the maximutempre. It is easy for
them to be as much -10ºC at fupower and at high
temperatures. It is suggested that mocouple be attached
directly to the erter’case througsmall hoin the plate
when investigaw hot the converter is getting. Care must
also be mde to eat there not a largrmal resistance
between the hermocd the case due tesive
migbe used to hold thmocouple in place.
To avoid any problems that might arise due to back-drive current,
the MQFL converters limit the negative current that the converter
can draw from its output terminals. The threshold 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 Characteristics) is small compared to the
converter’s rated output current.
THERMAL CONSIDERATIONS: The suggested Power Derating
Curves for this converter as a function of the case temperature and
the maximum desired power MOSFET junction temperature are on
the figure pages. All other components within the converter are
cooler than its hottest MOSFET, which at full power is no more
than 20ºC higher than the case temperature directly belo
MOSFET.
INSYSTEM NSTABILITY: Thidition can occur
becny DC/DC converter ppearmentaly as a
negattance load. A ded appln note titled
“Input Sytability” availn the Qor website
which provides an undeng of is insability arises,
ows the prefered sofor corrg it.
The Mil-HDBK-1547A component derating guideline calls for a
maximum component temperature of 105ºC. The wer derating
figure therefore has one power derating curvures this
limit is maintained. It has been SynQor’s extensivnce
that reliable long-term converter operation can be
with a maximum component temperae of 125ºC. In extr
cases, a maximum temperature of 145ºC is permissible, but not
recommended for long-term opion whre high reiability is
required. Derating curves for r temperature imits are
also included in the power deratinhe maximum cas
temperature at which the converter should rated is 135ºC
Product # MQFL-28V-1R5S
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Page 14
MQFL-28V-1R5S
Curre
40A
ꢂechnical Specification
CONSTRUCTION AND ENVIRONMENTAL STRESS SCREENING OPTIONS
ꢁS-Grade
(-55 ºC to +125 ºC)
(ꢁlement ꢁvaluation)
HB-Grade
+125 ºC)
(ꢁleluation)
Consistent with
MIL-SꢂD-883F
C-Grade
(-40 ºC to +100 ºC)
Screening
Internal Visual
Yes
ꢀo
Yes
Y
*
Conditio
(-55 ºC to +125 ºC)
dition
(-+150 ºC)
ꢂemperature Cycle
Method 1010
Constant
Acceleration
Method 2001
(Y1 Direction)
Cotion A
(5000g)
ꢀo
Method 1015
Load Cycled
Burn-in
• 10s period
24 Hrs @ +125 ºC
96 Hrs @ +125 ºC
160 Hrs @ +125 ºC
• 2s @ 100% Load
• 8s @ 0% Load
Method 5005
(Group A)
Final ꢁlectrical ꢂest
+25 ºC
5, +100 ºC
Full QorS
-5, +125
ull QorSeal
Mechanical Seal,
ꢂhermal, and Coating
Process
Ful
ꢁxternal Visual
2009
Yes
Yes
*
Construction Process
l
QorSeal
QorSeal
* Per IPC-A610 (Rev. D) Class
MilQor converters and filters are our variations of cstruction technique and environmental stress screening options. The
three highest grades, C, ES, and HB, all Qor’s proprietarorSeal™ Hi-Rel aembly process that includes a Parylene-C coating
of the circuit, a high pece thermal cound fillerand el barrier old plated aluminum case. Each successively higher
grade has more strngent al and electrical tesas welonger burn-in cycle. The ES- and HB-Grades are also con-
structed of compthat hn procured through ment eon process that pre-qualifies each new batch of devices.
Product # MQFL-28V-1R5S
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Page 15
MQFL-28V-1R5S
Curre
40A
ꢂechnical Specification
0.093
[2.36]
0.2
+VIN
ENA 2
1
12
IN RTN
SHARE
2
11
1.50 [38.10]
00 [5.0
ON-CM.
MQFL-28V-1R5S-X-HB
DC/DC CONVERTER
STABILITY
+SNS
-SNS
3
4
5
6
10 1.260
28Vin 1.5Vout @ 40A
[32.00]
ENA 1
9
8
7
MADE IN USA
OUT RTN
+VOUT
SYNC OUT
SYNC IN
0.0[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 [1.27]
0.220 [
.128 [3.25]
2.96 [75.2]
0.22
0.390 [9.91]
Case
0.093
[2.36]
0.5]
+VIN
1
12
11
0.200 [5.08]
TYP. NON-CUM.
IN RTN
STABILITY
SH
2
3
4
5
6
.10]
MQFL-28V-1R5S-U-B
DC/DC CONVER
+SNS
-SS
10 1.260
[32.00]
28Vin 1.5Vou
ENA 1
9
8
OUT RTN
+VOUT
SYNC OUT
SYNC IN
MADE IN USA
0.040 [1.02]
PIN
S/N 0000000 D/C 3X10
0.42
[10.7]
63.50]
.10]
3.0.20]
0.050 [1.27]
0.220 [5.59]
28 [3.25]
.80 [71.1]
Case U
0.390 [9.91]
NOTES
PIN DESIGNATIONS
1)
2)
Pins 0.040” (1.02mm) iameter
Pin Function
Pin Function
Pins Material: Cop
Finish: Gold over Nic
1
2
3
4
5
6
Positive input
Input return
Stability
7
8
9
Positive output
Output return
- Sense
3)
All dimensioninches (lerancex.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.01.xx +/m)
4)
5)
6)
Weighoz (7) typical
Enable 1
10 + Sense
11 Share
Workmaeets or exceeds IPC-A-610C Class III
Print LabelinSurface per Product Label Format Drawing
Sync output
Sync input
12 Enable 2
Product # MQFL-28V-1R5S
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Page 16
MQFL-28V-1R5S
Curre
40A
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
0.200
YP. NOM.
2.00
[50.80]
IN RTN
STABILITY
SHARE
+SNS
11
10
9
MQFL-28V-1R5S-Y-HB
DC/DC CONVERTER
1.50
[38.10]
28Vin 1.5Vout @ 40A
-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 [1.02]
PI
0.05.27]
0.29]
1.750 [44.45]
2.50 [63.50]
0.375 [9.52]
2.96 [75.2]
0.228 [5.79]
Case Y
Case Z
(of Y)
Case W
(variant of Y)
0.50 [6.35]
0.250 [6.35]
0.200 [5.08]
000 [5.08]
TYP. NON-UM.
TYP. NON-CUM.
0.040 [102]
PIN
0.040 [1.02]
PIN
0.420 [10.7]
0.050 [1.27]
0.220 [5.59]
0.220 [5.59]
0.050 [1.27]
36 [9.2]
2.80 [71.1]
0.525 [13.33]
0.390
[9.91]
0.390
[9.91]
525
80 [71.1
PIN DESIGNATIONS
Pin Function Pin Function
NOTES
1)
Pins 0.040” (1.02mmter
2)
Pins Material: Copper
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: Golckel pla
All dimeions ies (mm) es: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx 10 inxx +/-0.25mm)
Weight: 78.5 g) typical
Workmanshs or exceeds IPC-A-610C Class III
Print Labeling ourface per Product Label Format Drawing
3)
4)
5)
6)
10 + Sense
11 Share
12 Enable 2
Product # MQFL-28V-1R5S
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Page 17
MQFL-28V-1R5S
Curre
40A
ꢂechnical Specification
MilQor Converter FAMILY MATRIX
The tables below show the array of MQFL converters available. When ordering SynQor converters, please ensure that you use
the complete part number according to the table in the last page. Contact the factory for other requ.
Single Output
Output †
1.5V
1.8V
2.5V
3.3V
5V
6V
7.5V
9V
12V
(12S)
15V
±5V
5D)
12V
12D)
±15V
(15D)
Full Size
(1R5S) (1R8S) (2R5S) (3R3S) (05S)
(06S) (7R5S) (09S)
(28S
MQFL-28
16-40Vin Cont.
al
10A
Total
8A
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
17A
17A
20A
16A
16A
13A
1A
13A
1
A
11
1
10A
8A
8A
4A
4A
16-50Vin 1s Trans.*
Absolute Max Vin = 60V
MQFL-28ꢁ
16-70Vin Cont.
16-80Vin 1s Trans.*
Absolute Max Vin =100V
24A
Total
A
MQFL-28V
16-40Vin Cont.
5.5-50Vin 1s Trans.*
Absolute Max Vin = 60V
To
8A
tal
6.5A
Total
.5A
6.5A
8
3.3A
.3A
4
MQFL-28Vꢁ
16-70Vin Cont.
5.5-80Vin 1s Trans.*
Absolute Max Vin = 100V
A
Tota
6.5A
Total
MQFL-270
155-400Vin Cont.
155-475Vin 0.1s Trans.*
Absolute Max Vin = 550V
24A
Total
10A
Total
8A
Total
10A
Single Output
Dual Output †
28V
1.5V
1.8V
2.5V
3.
6V
7
9V
1
(12S)
(15
±5V
(05D)
±12V
(12D)
±15V
(15D)
Half Size
(1R5S) (1R8S) (2R5S) (3R3S)
S) (7R5S) (09S)
S)
MQHL-28 (50W)
16-40Vin Cont.
16-50Vin 1s Trans.*
Absolute Max Vin = 60V
10A
Total
4A
Total
3.3A
Total
20A
20A
20A
A
A
15A
15A
10A
10
8A
6.6A
6.6A
5.
5.5A
4A
3.3A
A
A
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
1
10
10A
10A
A
7.5A
5A
5A
4A
3.3A
2.75A
2.75A
2A
2A
1.65A
1.65A
0.9A
0.9A
MQHR-28ꢁ (25
16-70Vin Cont.
16-80Vin 1s Trans.*
Absolute Max Vin =100V
5A
Total
2A
Total
1.65A
Total
Check wctory for avail
Product # MQFL-28V-1R5S
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Page 18
MQFL-28V-1R5S
Curre
40A
ꢂechnical Specification
PART NUMBERING SYSTEM
The part numbering system for SynQor’s MilQor DC-DC converters follows the format shown in the table below.
Output Voltage(s)
Input
Model
ꢀame
Package Outline/
Pin Configuration
reeni
de
Voltage
Range
Single
Output
Dual
Output
1R5S
1R8S
2R5S
3R3S
05S
06S
7R5S
09S
28
28ꢁ
28V
28Vꢁ
U
X
Y
C
ꢁS
B
MQFL
MQHL
MQHR
05D
12D
15D
270
12S
15S
28S
Exam
MQFL-28V-1R5S–Y–ES
APPLICATION NOTES
A variety of application notes technical white ppers can be wnloaded in at from the SynQor website.
PATENTS
SynQor holds twing pone or more of whiht apphis product:
5,999,417
6,927,
6,22
7,050,3
6,55,890
7,072,190
577,109
5,146
,159
7,524
6,731,520
7,269,034
6,894,468
7,272,021
6,896,526
7,272,023
Contact SnQor for further rmaon:
Phone:
978-849-0600
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 Free8-567-9596
Fax:
849-002
E-ma
eb:
mqae@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.
ess: 155 Swanson Road
Boxborough, MA 01719
USA
Product # MQFL-28V-1R5S
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