MQFL-270-06S-WC [SYNQOR]
1-OUTPUT 120W DC-DC REG PWR SUPPLY MODULE, MODULE-12;
| 型号： | MQFL-270-06S-WC |
| 厂家： | 
SYNQOR WORLDWIDE HEADQUARTERS |
| 描述： | 1-OUTPUT 120W DC-DC REG PWR SUPPLY MODULE, MODULE-12 输出元件 |
| 文件： | 总17页 (文件大小：7728K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MQFL-270-06S
Single Output
HigH Reliability DC-DC ConveRteR
155-400 V
155-475 V
6.0 V
20 A
86% @ 10A / 88% @ 20A
Continuous Input
Transient Input
Output
Output
Efficiency
Full PoweR oPeRation: -55ºC to +125ºC
@
The MilQor series of high-reliability DC-DC converters
brings SynQor’s field proven high-efficiency synchronous
rectifier technology to the Military/Aerospace industry.
TM
SynQor’s innovative QorSeal packaging approach ensures
survivability in the most hostile environments. Compatible
with the industry standard format, these converters operate
at a fixed frequency, have no opto-isolators, and follow
conservative component derating guidelines. They are
designed and manufactured to comply with a wide range of
military standards.
2
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Design Process
D
f
esigneD & ManufactureD in the usa
MQFL series converters are:
•Designed for reliability per NAVSO-P3641-A guidelines
eaturing or sseMbly
Q
s
eal™
hi-rel
a
•Designed with components derated per:
— MIL-HDBK-1547A
Features
— NAVSO P-3641A
•
•
•
•
•
•
•
Fixed switching frequency
No opto-isolators
Parallel operation with current share
Remote sense
Qualification Process
MQFL series converters are qualified to:
Clock synchronization
•MIL-STD-810F
Primary and secondary referenced enable
Continuous short circuit and overload protection
with auto-restart feature
— consistent with RTCA/D0-160E
•SynQor’s First Article Qualification
— consistent with MIL-STD-883F
•SynQor’s Long-Term Storage Survivability Qualification
•SynQor’s on-going life test
•
Input under-voltage and over-voltage shutdown
Specification Compliance
In-Line Manufacturing Process
MQFL series converters (with MQME filter) are designed to meet:
•
MIL-HDBK-704-7 (A through F)
RTCA/DO-160 Section 16, 17, 18
MIL-STD-1275 (B, D)
DEF-STAN 61-5 (part 6)/(5, 6)
MIL-STD-461 (C, D, E, F)
•AS9100 and ISO 9001:2008 certified facility
•Full component traceability
•Temperature cycling
•Constant acceleration
•24, 96, 160 hour burn-in
•
•
•
•
•
RTCA/DO-160(E, F, G) Section 22
•Three level temperature screening
Product# MQFL-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 1
MQFL-270-06S
Output: 6.0V
Current: 20A
Technical Specification
BLOCK DIAGRAM
REGULATION STAGE
ISOLATION STAGE
CURRENT
SENSE
1
7
+Vin
+Vout
T1
T1
T2
2
INPUT
RETURN
8
OUTPUT
RETURN
T2
3
CASE
GATE DRIVERS
GATE DRIVERS
UVLO
OVSD
CURRENT
LIMIT
4
ENABLE 1
PRIMARY
CONTROL
MAGNETIC
DATA COUPLING
BIAS POWER
12
ENABLE 2
5
SYNC OUT
11
6
SECONDARY
CONTROL
SHARE
SYNC IN
10
+ SENSE
CONTROL
POWER
9
TRANSFORMER
−
SENSE
TYPICAL CONNECTION DIAGRAM
1
12
+VIN
IN RTN
ENA 2
open
means
on
2
3
4
5
6
11
10
9
SHARE
CASE
+SNS
-SNS
+
270 Vdc
+
MQFL
__
ENA 1
Load
__
8
open
means
on
SYNC OUT
SYNC IN
OUT RTN
+VOUT
7
Product# MQFL-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 2
MQFL-270-06S
Output: 6.0V
Current: 20A
Technical Specification
MQFL-270-06S ELECTRICAL CHARACTERISTICS
Parameter
Min. Typ. Max. Units Notes & Conditions
Group A
Vin=270 V dc ±5%, Iout=20 A, CL=0 µF, free running (see Note 10) unless
otherwise specified
Subgroup
(see Note 13)
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
600
550
-0.8
-1.2
V
V
V
V
Operating
See Note 1
Reverse Bias (Tcase = 125ºC)
Reverse Bias (Tcase = -55ºC)
Isolation Voltage (I/O to case, I to O)
Continuous
-500
-800
-55
500
800
125
135
300
50
V
V
°C
°C
°C
V
Transient (≤100 µs)
Operating Case Temperature
Storage Case Temperature
Lead Temperature (20 s)
HB Grade Products, See Notes 2 & 16
-65
Voltage at ENA1, ENA2
-1.2
INPUT CHARACTERISTICS
Operating Input Voltage Range
“
155
155
270
270
400
475
V
V
Continuous
Transient, 1 s
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
142
133
5
150
140
11
155
145
17
V
V
V
1, 2, 3
1, 2, 3
1, 2, 3
See Note 3
490
450
20
520
475
50
550
500
80
1
37
4
V
V
V
A
mA
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 = 155 V; Iout = 20 A
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)
Vout Set Point Over Temperature
Output Voltage Line Regulation
Output Voltage Load Regulation
Total Output Voltage Range
Vout Ripple and Noise Peak to Peak
Operating Output Current Range
Operating Output Power Range
Output DC Current-Limit Inception
Short Circuit Output Current
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance
DYNAMIC CHARACTERISTICS
Output Voltage Deviation Load Transient
For a Pos. Step Change in Load Current
For a Neg. Step Change in Load Current
Settling Time (either case)
Output Voltage Deviation Line Transient
For a Pos. Step Change in Line Voltage
For a Neg. Step Change in Line Voltage
Settling Time (either case)
Turn-On Transient
28
1
6
140
Vin = 155 V, 270 V, 475 V
Vin = 155 V, 270 V, 475 V
Bandwidth = 100 kHz – 10 MHz; see Figure 14
11
180
5.94
5.9
-20
20
5.88
6.00
6.00
0
30
6.00
15
6.06
6.1
20
V
V
mV
mV
V
mV
A
W
A
A
A
Vout at sense leads
1
2, 3
“
“ ; Vin = 155 V, 270 V, 400 V; Iout=20 A
“ ; Vout @ (Iout=0 A) - Vout @ (Iout=20 A)
“
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
40
6.12
50
Bandwidth = 10 MHz; CL=11µF
0
0
22
21
20
120
26
24
24
6.4
10
See Note 4
Vout ≤ 1.2 V; see Note 15
27
75
10,000
mA
µF
See Note 6
-575
-375
375
200
mV
mV
µs
Total Iout step = 10A‹-›20A, 2A‹-›10A; CL=11µF
4, 5, 6
4, 5, 6
4, 5, 6
575
500
“
See Note 7
Vin step = 155V‹-›400V; CL=11 µF; see Note 8
-1000
-1200
1000
1200
650
mV
mV
µs
“
“
4, 5, 6
4, 5, 6
See Note 5
500
Iout = 10 A; See Note 7
Output Voltage Rise Time
Output Voltage Overshoot
Turn-On Delay, Rising Vin
6
0
75
5
2
10
2
120
10
4
ms
%
ms
ms
ms
Vout = 0.6V-›5.4V
4, 5, 6
See Note 5
4, 5, 6
4, 5, 6
4, 5, 6
50
ENA1, ENA2 = 5 V; see Notes 9 & 11
ENA2 = 5 V; see Note 11
ENA1 = 5 V; see Note 11
Turn-On Delay, Rising ENA1
Turn-On Delay, Rising ENA2
EFFICIENCY
Iout = 20 A (155 Vin)
85
86
84
81
80
75
89
89
88
86
86
82
%
%
%
%
%
%
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
Iout = 10 A (155 Vin)
Iout = 20 A (270 Vin)
Iout = 10 A (270 Vin)
Iout = 20 A (400 Vin)
Iout = 10 A (400 Vin)
Load Fault Power Dissipation
Short Circuit Power Dissipation
19
24
36
40
W
W
Iout at current limit inception point; See Note 4
Vout ≤ 1.2 V
1, 2, 3
1, 2, 3
Product# MQFL-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 3
MQFL-270-06S
Output: 6.0V
Current: 20A
Technical Specification
MQFL-270-06S ELECTRICAL CHARACTERISTICS (Continued)
Parameter
Min. Typ. Max. Units Notes & Conditions
Group A
Vin=270 V dc ±5%, Iout=20 A, CL=0 µF, free running (see Note 10) unless
otherwise specified
Subgroup
(see Note 13)
ISOLATION CHARACTERISTICS
Isolation Voltage
Dielectric strength
Input RTN to Output RTN
Any Input Pin to Case
500
500
500
100
100
V
V
V
MΩ
MΩ
nF
1
1
1
1
1
1
Any Output Pin to Case
Isolation Resistance (in rtn to out rtn)
Isolation Resistance (any pin to case)
Isolation Capacitance (in rtn to out rtn)
FEATURE CHARACTERISTICS
Switching Frequency (free running)
Synchronization Input
44
500
550
600
kHz
1, 2, 3
Frequency Range
Logic Level High
Logic Level Low
Duty Cycle
500
2.0
-0.5
20
700
5.5
0.8
80
kHz
V
V
1, 2, 3
1, 2, 3
1, 2, 3
%
See Note 5
Synchronization Output
Pull Down Current
Duty Cycle
20
25
mA
%
VSYNC OUT = 0.8 V
Output connected to SYNC IN of other MQFL unit
See Note 5
See Note 5
75
Enable Control (ENA1 and ENA2)
Off-State Voltage
Module Off Pulldown Current
On-State Voltage
0.8
V
µA
V
1, 2, 3
See Note 5
1, 2, 3
80
2
Current drain required to ensure module is off
Module On Pin Leakage Current
Pull-Up Voltage
20
4.8
µA
V
Imax draw from pin allowed with module still on
See Figure A
See Note 5
1, 2, 3
3.2
4.0
RELIABILITY CHARACTERISTICS
Calculated MTBF (MIL-STD-217F2)
GB @ Tcase = 70ºC
2600
300
103 Hrs.
103 Hrs.
AIF @ Tcase = 70ºC
WEIGHT CHARACTERISTICS
Device Weight
79
g
Electrical Characteristics Notes
1. Converter will undergo input over-voltage shutdown.
2. Derate output power to 50% of rated power at Tcase = 135ºC. 135ºC is above specified operating range.
3. High or low state of input voltage must persist for about 200µs to be acted on by the lockout or shutdown circuitry.
4. Current limit inception is defined as the point where the output voltage has dropped to 90% of its nominal value.
5. Parameter not tested but guaranteed to the limit specified.
6. Load current transition time ≥ 10 µs.
7. Settling time measured from start of transient to the point where the output voltage has returned to ±1% of its final value.
8. Line voltage transition time ≥ 250 µs.
9. Input voltage rise time ≥ 250 µs.
10. Operating the converter at a synchronization frequency above the free running frequency will slightly reduce the converter’s efficiency and may also cause
a slight reduction in the maximum output current/power available. For more information consult the factory.
11. After a disable or fault event, module is inhibited from restarting for 300 ms. See Shut Down section.
12. SHARE pin outputs a power failure warning pulse during a fault condition. See Current Share section.
13. Only the ES and HB grade products are tested at three temperatures. The C- grade products are tested at one temperature. Please refer to the ESS table
for details.
14. These derating curves apply for the ES and HB grade products. The C- grade product has a maximum case temperature of 70ºC and a maximum junction
temperature rise of 20ºC above TCASE.
15. Converter delivers current into a persisting short circuit for up to 1 second. See Current Limit in the Application Notes section.
16. The specified operating case temperature for ES grade products is -45ºC to 100ºC. The specified operating case temperature for C- grade products is 0ºC
to 70ºC.
Product# MQFL-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 4
MQFL-270-06S
Output: 6.0V
Current: 20A
Technical Figures
100
95
90
85
80
75
70
65
60
100
95
90
85
80
75
70
65
60
155 Vin
270 Vin
400 Vin
155 Vin
270 Vin
400 Vin
0
4
8
12
16
20
-55°C -35°C -15°C
5°C
25°C
45°C
65°C
85°C 105°C 125°C
Load Current (A)
Case Temperature (ºC)
Figure 1: Efficiency at nominal output voltage vs. load current for
Figure 2: Efficiency at nominal output voltage and 60% rated power vs.
minimum, nominal, and maximum input voltage at TCASE=25°C.
case temperature for input voltage of 155V, 270V and 400V.
22
20
18
16
14
12
10
8
22
20
18
16
14
12
10
8
6
6
155 Vin
155 Vin
4
2
0
4
270 Vin
400 Vin
270 Vin
2
400 Vin
0
0
4
8
12
16
20
-55°C -35°C -15°C
5°C
25°C
45°C
65°C
85°C 105°C 125°C
Load Current (A)
Case Temperature (ºC)
Figure 4: Power dissipation at nominal output voltage and 60% rated
Figure 3: Power dissipation at nominal output voltage vs. load current
power vs. case temperature for input voltage of 155V, 270V and 400V.
for minimum, nominal, and maximum input voltage at Tcase=25°C.
32
28
24
20
16
12
8
192
168
144
120
96
7
6
5
4
3
2
72
48
Tjmax = 105ºC
Tjmax = 125ºC
Tjmax = 145ºC
270 Vin
1
4
24
0
0
0
25
45
65
85
105
125
145
135
0
5
10
15
20
25
Case Temperature (ºC)
Load Current (A)
Figure 5: Output Current / Output Power derating curve as a
function of Tcase and the Maximum desired power MOSFET junction
temperature (see Note 14). Vin = 270V
Figure 6: Output voltage vs. load current showing typical current limit
curves. See Current Limit section in the Application Notes.
Product# MQFL-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 5
MQFL-270-06S
Output: 6.0V
Current: 20A
Technical Figures
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: Turn-on transient at full resistive load and 3mF output
capacitance initiated by ENA1. Input voltage pre-applied. Ch 1: Vout
(2V/div). Ch 2: ENA1 (5V/div).
Figure 10: Turn-on transient at full resistive load and zero output
capacitance initiated by Vin. ENA1 and ENA2 both previously high. Ch
1: Vout (2V/div). Ch 2: Vin (100V/div).
Figure 9: Turn-on transient at full resistive load and zero output
capacitance initiated by ENA2. Input voltage pre-applied. Ch 1: Vout
(2V/div). Ch 2: ENA2 (5V/div).
Figure 11: Output voltage response 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 10%-
50%-10% 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-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 6
MQFL-270-06S
Output: 6.0V
Current: 20A
Technical Figures
Figure 13: Output voltage response to step-change in input voltage (155V
- 400V - 155V) in 250 μS. Load cap: 10µF, 100mΩ ESR tantalum cap and
1µF ceramic cap. Ch 1: Vin (100V/div). Ch 2: Vout (500mV/div).
Figure 14: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 15) and Output Voltage Ripple (Figure
16).
capacitor and 10µF tantalum capacitor. Bandwidth: 10MHz. See
Figure 14.
Bandwidth: 20MHz. See Figure 14.
MQFL converter. Ch1: SYNC OUT: (1V/div).
across the output terminals. Ch 1: Vout (2V/div). Ch 2: Iout (10A/div).
Product# MQFL-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 7
MQFL-270-06S
Output: 6.0V
Current: 20A
Technical Figures
0.1
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0.01
155 Vin
270 Vin
400 Vin
155 Vin
270 Vin
400 Vin
0.001
10
100
1,000
Hz
10,000
100,000
10
100
1,000
Hz
10,000
100,000
Figure 20: Magnitude of incremental forward transmission (FT = vout/
vin) for minimum, nominal, and maximum input voltage at full rated
power.
Figure 19: Magnitude of incremental output impedance (Zout = vout/
iout) for minimum, nominal, and maximum input voltage at full rated
power.
Figure 21: Magnitude of incremental reverse transmission (RT = iin/
iout) for minimum, nominal, and maximum input voltage at full rated
power.
Figure 22: Magnitude of incremental input impedance (Zin = vin/iin)
for minimum, nominal, and maximum input voltage at full rated power.
Figure 23: High frequency conducted emissions of standalone MQFL-
270-05S, 5Vout module at 120W output, as measured with Method
CE102. Limit line shown is the ‘Basic Curve’for all applications with a
270V source.
Figure 24: High frequency conducted emissions of MQFL-270-05S,
5Vout module at 120W output with MQFL-270-P filter, as measured
with Method CE102. Limit line shown is the ‘Basic Curve’for all
applications with a 270V source.
Product# MQFL-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 8
MQFL-270-06S
Output: 6.0V
Current: 20A
Application Section
BASIC OPERATION AND FEATURES
CONTROL FEATURES
The MQFL DC-DC converter uses a two-stage power conversion
topology. The first, or regulation, stage is a buck-converter that
keeps the output voltage constant over variations in line, load,
and temperature. The second, or isolation, stage uses trans-
formers to provide the functions of input/output isolation and
voltage transformation to achieve the output voltage required.
ENABLE: The MQFL converter has two enable pins. Both must
have a logic high level for the converter to be enabled. A logic
low on either pin will inhibit the converter.
The ENA1 pin (pin 4) is referenced with respect to the convert-
er’s input return (pin 2). The ENA2 pin (pin 12) is referenced
with respect to the converter’s output return (pin 8). This per-
mits the converter to be inhibited from either the input or the
output side.
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.
Regardless of which pin is used to inhibit the converter, the
regulation and the isolation stages are turned off. However,
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 in the latter case.
Rectification of the isolation stage’s output is accomplished with
synchronous rectifiers. These devices, which are MOSFETs with a
very low resistance, dissipate far less energy than would Schottky
diodes. This is the primary reason why the MQFL converters have
such high efficiency, particularly at low output voltages.
Both enable pins are internally pulled high so that an open con-
nection on both pins will enable the converter. Figure A shows
the equivalent circuit looking into either enable pins. It is TTL
compatible.
Besides improving efficiency, the synchronous rectifiers permit
operation down to zero load current. There is no longer a need
for a minimum load, as is typical for converters that use diodes
for rectification. The synchronous rectifiers actually permit a
negative load current to flow back into the converter’s output
terminals if the load is a source of short or long term energy.
The MQFL converters employ a “back-drive current limit” to
keep this negative output terminal current small.
5.0V
68K
1N4148
PIN 4
(OR PIN 12)
ENABLE
TO ENABLE
CIRCUITRY
250K
125K
2N3904
There is a control circuit on both the input and output sides
of the MQFL converter that determines the conduction state
of the power switches. These circuits communicate with each
other across the isolation barrier through a magnetically coupled
device. No opto-isolators are used. A separate bias supply pro-
vides power to both the input and output control circuits.
PIN 2
(OR PIN 8)
IN RTN
Figure A: Circuit diagram shown for reference only, actual circuit
components may differ from values shown for equivalent circuit.
An input under-voltage lockout feature with hysteresis is pro-
vided, as well as an input over-voltage shutdown. There is also
an output current limit that is nearly constant as the load imped-
ance decreases to a short circuit (i.e., there is no fold-back or
fold-forward characteristic to the output current under this con-
dition). When a load fault is removed, the output voltage rises
exponentially to its nominal value without an overshoot.
SHUT DOWN: The MQFL converter will shut down in response
to following conditions:
- ENA1 input low
- ENA2 input low
- VIN input below under-voltage lockout threshold
- VIN input above over-voltage shutdown threshold
- Persistent current limit event lasting more than 1 second
The MQFL converter’s control circuit does not implement an out-
put over-voltage limit or an over-temperature shutdown.
The following sections describe the use and operation of addi-
tional control features provided by the MQFL converter.
Following a shutdown from a disable event or an input voltage
fault, 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
Product# MQFL-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 9
MQFL-270-06S
Output: 6.0V
Current: 20A
Application Section
operating range, there is no startup inhibit, and the output voltage
will rise according to the “Turn-On Delay, Rising Vin” specification.
The MQFL converter also has a SYNC OUT pin (pin 5). This out-
put can be used to drive the SYNC IN pins of as many as ten (10)
other MQFL converters. The pulse train coming out of SYNC
OUT has a duty cycle of 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
synchronization signal at the SYNC IN pin, or the synchronization
frequency if there is.
Refer to the following Current Limit section for details regarding
persistent current limit behavior.
REMOTE SENSE: The purpose of the remote sense pins is
to correct for the voltage drop along the conductors that con-
nect the converter’s output to the load. To achieve this goal, a
separate conductor should be used to connect the +SENSE pin
(pin 10) directly to the positive terminal of the load, as shown
in the connection diagram. Similarly, the –SENSE pin (pin 9)
should be connected through a separate conductor to the return
terminal of the load.
The SYNC OUT signal is available only when the DC input volt-
age is above approximately 125V and when the converter is not
inhibited through the ENA1 pin. An inhibit through the ENA2 pin
will not turn the SYNC OUT signal off.
NOTE: An MQFL converter that has its SYNC IN pin driven by
the SYNC OUT pin of a second MQFL converter will have its start
of its switching cycle delayed approximately 180 degrees relative
to that of the second converter.
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.
Figure B shows the equivalent circuit looking into the SYNC IN pin.
Figure C shows the equivalent circuit looking into the SYNC OUT pin.
5V
Inside the converter, +SENSE is connected to +Vout with a
100W resistor and –SENSE is connected to OUTPUT RETURN
with a 10W resistor.
5K
TO SYNC
CIRCUITRY
PIN 6
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 volt-
age at the terminals produces a greater voltage stress on the
converter’s internal components and may cause the converter to
fail to deliver the desired output voltage at the low end of the
input voltage range at the higher end of the load current and
temperature range. Please consult the factory for details.
SYNC IN
IN RTN
5K
PIN 2
Figure B: Equivalent circuit looking into the SYNC IN pin with
respect to the IN RTN (input return) pin.
SYNCHRONIZATION: The MQFL converter’s switching fre-
quency can be synchronized to an external frequency source
that is in the 500 kHz to 700 kHz range. A pulse train at the
desired frequency should be applied to the SYNC 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 to be interpreted
as a logic low, and its high value should be above 2.0V to be
guaranteed to be interpreted as a logic high. The transition time
between the two 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 converter is not to be synchronized, the SYNC IN pin
should be left open circuit. The converter will then operate in
its free-running mode at a frequency of approximately 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 IN pin is held in either a logic low or
logic high state continuously, the MQFL converter will revert to
its free-running frequency.
Product# MQFL-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 10
MQFL-270-06S
Output: 6.0V
Current: 20A
Application Section
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.
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.
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 repre-
sents the maximum rated total current, with a linear relationship
Figure E: Output Voltage Trim Graph
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:
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. During a current limit auto-restart event, the SHARE pin
outputs a startup synchronization pulse. The SHARE pin will go
to 5V for approximately 2ms before the converter restarts.
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.
NOTE: Converters operating from separate input filters with
reverse polarity protection (such as the MQME-270-R filter)
with their outputs connected in parallel may exhibit auto-restart
operation at light loads. Consult factory for details.
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
the load current and temperature range. Please consult the
factory for details. Factory trimmed converters are available
by request.
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
1
12
+VIN
ENA 2
2
11
IN RTN
SHARE
3
10
CASE
+ SNS
Rtrim
4
5
6
9
+
–
270Vdc
ENA 1
– SNS
–
8
7
SYNC OUT
SYNC IN
OUT RTN
+VOUT
open
means
on
Load
+
Figure D: Typical connection for output voltage trimming.
Product# MQFL-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 11
MQFL-270-06S
Output: 6.0V
Current: 20A
Application Section
INPUT UNDER-VOLTAGE LOCKOUT: The MQFL converter
has an under-voltage lockout feature that ensures the converter
will be off if the input voltage is too low. The threshold of
input voltage at which the converter will turn on is higher that
the threshold at which it will turn off. In addition, the MQFL
converter will not respond to a state of the input voltage unless
it has remained 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.
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
on the figures page. 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
below this MOSFET. The Mil-HDBK-1547A component derating
guideline calls for a maximum component temperature of 105ºC.
The power derating figure; therefore has one power derating
curve that ensures this limit is maintained. It has been SynQor’s
extensive experience that reliable long-term converter operation
can be achieved with a maximum component temperature of
125ºC. In extreme cases, a maximum temperature of 145ºC is
permissible, but not recommended for long-term operation where
high reliability is required. Derating curves for these higher
temperature limits are also included in Figure 5. The maximum
case temperature at which the converter should be operated is
135ºC.
INPUT 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.
CURRENT LIMIT: The converter will reduce its output volt-
age in response to an overload condition. If the output voltage
drops to below approximately 50% of the nominal setpoint for
longer than 1 second, the auto-restart feature will engage. The
auto-restart feature will stop the converter from delivering load
current, in order to protect the converter and the load from ther-
mal damage. After four seconds have elapsed, the converter will
automatically restart.
When the converter is mounted on a metal plate, the plate
will help to make the converter’s case bottom a uniform tem-
perature. How well it does so depends on the thickness of the
plate and on the thermal conductance of the interface layer
(e.g. thermal grease, thermal pad, etc.) between the case and
the plate. Unless this is done very well, it is important not to
mistake the plate’s temperature for the maximum case tempera-
ture. It is easy for them to be as much as 5-10ºC different at
full power and at high temperatures. It is suggested that a ther-
mocouple be attached directly to the converter’s case through a
small hole in the plate when investigating how hot the converter
is getting. Care must also be made to ensure that there is not
a large thermal resistance between the thermocouple and the
case due to whatever adhesive might be used to hold the ther-
mocouple in place.
In a system with multiple converters configured for load sharing
using the SHARE pin, if the auto-restart feature engages,
the converters will synchronize their restart using signals
communicated on the SHARE pin.
BACK-DRIVE CURRENT LIMIT: Converters that use MOSFETs
as synchronous rectifiers are capable of drawing a negative cur-
rent from the load if the load is a source of short- or long-term
energy. This negative current is referred to as a “back-drive cur-
rent”.
Conditions where back-drive current might occur include
paralleled converters that do not employ current sharing, or
where the current share feature does not adequately ensure
sharing during the startup or shutdown transitions. It can also
occur when converters having different output voltages are
connected together through either explicit or parasitic diodes
that, while normally off, become conductive during startup or
shutdown. Finally, some loads, such as motors, can return
energy to their power rail. Even a load capacitor is a source of
back-drive energy for some period of time during a shutdown
transient.
INPUT SYSTEM INSTABILITY: This condition can occur
because any DC-DC converter appears incrementally as a
negative resistance load. A detailed application note titled
“Input System Instability” is available on the SynQor website
which provides an understanding of why this instability arises,
and shows the preferred solution for correcting it.
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 page) is
small compared to the converter’s rated output current.
Product# MQFL-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 12
MQFL-270-06S
Output: 6.0V
Current: 20A
Stress Screening
CONSTRUCTION AND ENVIRONMENTAL STRESS SCREENING OPTIONS
C-Grade
ES-Grade
HB-Grade
Consistent with
MIL-STD-883F
Screening
specified from
specified from
(
0spºeCcitfioe+d7f0roºmC ) (-45 ºC to +100 ºC) (-55 ºC to +125 ºC
)
Element Evaluation
No
Yes
No
No
Yes
Yes
Internal Visual
Temperature Cycle
Constant Acceleration
*
Yes
Yes
Condition B
(-55 ºC to +125 ºC)
Condition C
(-65 ºC to +150 ºC)
Method 1010
Method 2001
(Y1 Direction)
Condition A
(5000g)
500g
Burn-in
Method 1015
24 Hrs @ +125 ºC
96 Hrs @ +125 ºC
160 Hrs @ +125 ºC
Final Electrical Test
Method 5005 (Group A)
+25 ºC
Full QorSeal
*
-45, +25, +100 ºC
Full QorSeal
Yes
-55, +25, +125 ºC
Full QorSeal
Yes
Mechanical Seal,
Thermal, and
Coating Process
External Visual
2009
Construction Process
QorSeal
QorSeal
QorSeal
* Per IPC-A-610 Class 3
MilQor converters and filters are offered in three variations of environmental stress screening options. All MilQor converters use SynQor’s proprietary
QorSeal™ Hi-Rel assembly process that includes a Parylene-C coating of the circuit, a high performance thermal compound filler, and a nickel barrier
gold plated aluminum case. Each successively higher grade has more stringent mechanical and electrical testing, as well as a longer burn-in cycle. The ES-
and HB-Grades are also constructed of components that have been procured through an element evaluation process that pre-qualifies each new batch of
devices.
Product# MQFL-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 13
MQFL-270-06S
Output: 6.0V
Current: 20A
Mechanical Diagrams
0.250 [6.35]
+VIN
ENA 2
SHARE
+SNS
1
12
SEE NOTE 7
IN RTN
2
11
1.50 [38.1]
0.200 [5.08]
TYP. NON-CUM.
MQFL-270-06S-X-ES
DC-DC CONVERTER
CASE
3
10 1.260
ENA 1
270Vin 6.0Vout @ 20A
4
-SNS
[32.00]
9
8
7
MADE IN USA
SYNC OUT
OUT RTN
+VOUT
5
0.040 [1.02]
S/N 0000000 D/C 3205-301 CAGE 1WX10
SYNC IN
6
PIN
2.50 [63.50]
2.760 [70.10]
3.00 [76.2]
0.050 [1.27]
0.128 [3.25]
0.22 [5.6]
2.96 [75.2]
0.228 [5.79]
0.390 [9.91]
Case X
0.250 [6.35]
+VIN
ENA 2
1
2
3
4
12
11
SEE NOTE 7
0.200 [5.08]
TYP.
IN RTN
CASE
SHARE
+SNS
1.50 [38.1]
MQFL-270-06S-U-ES
DC-DC CONVERTER
270Vin 6.0Vout @ 20A
10 1.260
NON-CUM.
ENA 1
-SNS
[32.00]
9
8
7
SYNC OUT
SYNC IN
OUT RTN
+VOUT
5
MADE IN USA
0.040
[1.02]
PIN
S/N 0000000 D/C 3211-301 CAGE 1WX10
6
0.42
[10.7]
2.50 [63.5]
2.760 [70.10]
3.00 [76.2]
0.050 [1.27]
0.128 [3.25]
0.22 [5.6]
2.80 [71.1]
0.390 [9.91]
Case U
PIN DESIGNATIONS
Pin # Function Pin # Function
NOTES
1)
Pins 0.040’’ (1.02mm) diameter
2)
Pin Material: Copper Alloy
Finish: Gold over Nickel plating, followed by Sn/Pb solder dip
All dimensions in inches (mm) Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
Weight: 2.8 oz (78.5 g) typical
Workmanship: Meets or exceeds IPC-A-610 Class III
Print Labeling on Top Surface per Product Label Format Drawing
Pin 1 identification hole, not intended for mounting (case X and U)
Baseplate flatness tolerance is 0.004” (.10mm) TIR for surface.
1
2
3
4
5
6
Positive input
Input return
Case
Enable 1
Sync output
Sync input
7
8
9
Positive output
Output return
- Sense
3)
4)
5)
6)
7)
8)
10 + Sense
11 Share
12 Enable 2
Product# MQFL-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 14
MQFL-270-06S
Output: 6.0V
Current: 20A
Mechanical Diagrams
0.300 [7.62]
1.150 [29.21]
0.140 [3.56]
0.250 [6.35]
TYP
0.250 [6.35]
+VIN
ENA 2
SHARE
1
12
11
10
9
0.200 [5.08]
TYP. NON-CUM.
2.000
[50.80]
IN RTN
2
3
4
5
6
CASE
+SNS
MQFL-270-06S-Y-ES
DC-DC CONVERTER
270Vin 6.0Vout @ 20A
1.50
[38.1]
ENA 1
-SNS
SYNC OUT
SYNC IN
MADE IN USA OUT RTN
8
1.750
[44.45]
S/N 0000000 D/C 3211-301 CAGE 1WX10
+VOUT
7
0.040 [1.02]
PIN
0.050 [1.27]
1.750 [44.45]
2.50 [63.5]
0.375 [9.52]
0.22 [5.6]
2.96 [75.2]
0.228 [5.79]
0.390 [9.91]
Case Y
Case Z
(variant of Y)
Case W
(variant of Y)
0.250 [6.35]
0.250 [6.35]
0.200 [5.08]
TYP. NON-CUM.
0.200 [5.08]
TYP. NON-CUM.
0.040 [1.02]
PIN
0.040 [1.02]
PIN
0.22 [5.6]
0.050 [1.27]
0.42 [10.7]
0.050 [1.27]
0.22 [5.6]
0.36 [9.14]
2.80 [71.1]
0.525 [13.33]
0.390
[9.91]
0.525 [13.33]
0.390
[9.91]
2.80 [71.1]
PIN DESIGNATIONS
Pin # Function Pin # Function
NOTES
1)
Pins 0.040’’ (1.02mm) diameter
2)
Pin Material: Copper Alloy
Finish: Gold over Nickel plating, followed by Sn/Pb solder dip
All dimensions in inches (mm) Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
Weight: 2.8 oz (78.5 g) typical
Workmanship: Meets or exceeds IPC-A-610 Class III
Print Labeling on Top Surface per Product Label Format Drawing
Pin 1 identification hole, not intended for mounting (case X and U)
Baseplate flatness tolerance is 0.004” (.10mm) TIR for surface.
1
2
3
4
5
6
Positive input
Input return
Case
Enable 1
Sync output
Sync input
7
8
9
Positive output
Output return
- Sense
3)
4)
5)
6)
7)
8)
10 + Sense
11 Share
12 Enable 2
Product# MQFL-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 15
MQFL-270-06S
Output: 6.0V
Current: 20A
Ordering Information
MilQor Converter FAMILY MATRIX
The tables below show the array of MilQor 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 requirements.
Single Output
Dual Output †
1.5V
1.8V
2.5V
3.3V
5V
6V
7.5V
9V
12V
15V
28V
5V
12V
15V
Full Size
MQFL-28
(1R5S) (1R8S) (2R5S) (3R3S)
(05S)
(06S)
(7R5S)
(09S)
(12S)
(15S)
(28S)
(05D)
(12D)
(15D)
16-40Vin Cont.
24A
Total
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
13A
16A
13A
13A
11A
11A
13A
10A
10A
8A
8A
8A
4A
4A
16-50Vin 1s Trans.*
Absolute Max Vin = 60V
MQFL-28E
16-70Vin Cont.
24A
Total
10A
Total
8A
Total
16-80Vin 1s Trans.*
Absolute Max Vin =100V
MQFL-28V
16-40Vin Cont.
6.5A
6.5A
8A
3.3A
3.3A
4A
5.5-50Vin 1s Trans.*
Absolute Max Vin = 60V
MQFL-28VE
16-70Vin Cont.
8A
5.5-80Vin 1s Trans.*
Absolute Max Vin = 100V
MQFL-270
155-400Vin Cont.
24A
Total
10A
Total
8A
Total
10A
155-475Vin 1s Trans.*
Absolute Max Vin = 550V
MQFL-270L
15A
Total
6A
Total
5A
Total
65-350Vin Cont.
40A
40A
30A
22A
15A
12A
10A
8A
6A
5A
2.7A
65-475Vin 1s Trans.*
Absolute Max Vin = 550V
Single Output
Dual Output †
1.5V
1.8V
2.5V
3.3V
5V
6V
7.5V
9V
12V
15V
28V
5V
12V
15V
Half Size
(1R5S) (1R8S) (2R5S) (3R3S)
(05S)
(06S)
(7R5S)
(09S)
(12S)
(15S)
(28S)
(05D)
(12D)
(15D)
MQHL-28
16-40Vin Cont.
10A
Total
4A
Total
3.3A
Total
20A
20A
10A
20A
20A
10A
20A
20A
10A
15A
15A
7.5A
10A
10A
5A
8A
8A
4A
6.6A
6.6A
3.3A
5.5A
5.5A
4A
4A
2A
3.3A
3.3A
1.8A
1.8A
0.9A
16-50Vin 1s Trans.*
Absolute Max Vin = 60V
MQHL-28E
16-70Vin Cont.
10A
Total
4A
Total
3.3A
Total
16-80Vin 1s Trans.*
Absolute Max Vin =100V
MQHR-28
16-40Vin Cont.
5A
Total
2A
Total
1.65A
Total
2.75A
1.65A
16-50Vin 1s Trans.*
Absolute Max Vin = 60V
MQHR-28E
16-70Vin Cont.
5A
Total
2A
Total
1.65A
Total
10A
10A
10A
7.5A
5A
4A
3.3A
2.75A
2A
1.65A
0.9A
16-80Vin 1s Trans.*
Absolute Max Vin = 100V
Check with factory for availability.
†80% of total output current available on any one output.
*Converters may be operated at the highest transient input voltage, but some component electrical and thermal stresses would be beyond MIL-
HDBK-1547A guidelines.
Product# MQFL-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 16
MQFL-270-06S
Output: 6.0V
Current: 20A
Ordering Information
PART NUMBERING SYSTEM
The part numbering system for SynQor’s MilQor DC-DC converters follows the format shown in the table below.
Not all combinations make valid part numbers, please contact SynQor for availability. See the Product Summary web page for more options.
Example: MQFL-270-06S-Y-ES
Output Voltage(s)
Input
Voltage
Range
Model
Name
Package Outline/
Pin Configuration
Screening
Grade
Single
Dual
Output
Output
1R5S
1R8S
2R5S
3R3S
05S
06S
7R5S
09S
28
28E
28V
28VE
U
X
Y
W
Z
MQFL
MQHL
MQHR
05D
12D
15D
C
ES
HB
270
270L
12S
15S
28S
APPLICATION NOTES
A variety of application notes and technical white papers can be downloaded in pdf format from the SynQor website.
PATENTS
SynQor holds the following U.S. patents, one or more of which apply to each product listed in this document. Additional patent applications may be
pending or filed in the future.
5,999,417
6,894,468
7,119,524
7,765,687
6,222,742
6,896,526
7,269,034
7,787,261
6,545,890
6,927,987
7,272,021
8,023,290
6,577,109
7,050,309
7,272,023
8,149,597
6,594,159
7,072,190
7,558,083
6,731,520
7,085,146
7,564,702
Contact SynQor for further information and to order:
Warranty
SynQor offers a two (2) year limited warranty. Complete warranty informa-
tion is listed on our website or is available upon request from SynQor.
Phone:
Toll Free: 1-888-567-9596
978-849-0600
Fax:
E-mail:
Web:
978-849-0602
mqnbofae@synqor.com
www.synqor.com
Information furnished by SynQor is believed to be accurate and reliable.
However, no responsibility is assumed by SynQor for its use, nor for any
infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any
patent or patent rights of SynQor.
Address: 155 Swanson Road
Boxborough, MA 01719
USA
Product# MQFL-270-06S
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-005058 Rev. C
08/13/13
Page 17
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