10A/120W

MQFL-28E-12D
Dual Output
H igH R eliability DC-DC C onveRteR
16-70V
16-80V
±12V
10A
90% @ 5A / 88% @ 10A
Continuous Input
Transient Input
Output
Total Output
Efficiency
F ull P oweR o PeRation : -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.
SynQor’s innovative QorSeal® packaging approach ensures
survivability in the most hostile environments. Compatible
2
ENA
with the industry standard format, these converters operate
RE
SHA
at a fixed frequency, have no opto-isolators, and follow
conservative component derating guidelines.
12
8E- Er
+VIN
They are
-2
QFL
N
IN RT
E
CAS
designed and manufactured to comply with a wide range of
1
ENA
t
VEr
M DC Con [email protected] 1WX10
o
E
V
C
2
AG
D
1
1C
in ±
5-30
320
28V
D/C
T
C OU
SYN
C IN
SYN
military standards.
-ES
D-Y
TRIM
T
-VOU
RTN
OUT
T
+VOU
0
000
000
S/n
Design Process
MQFL series converters are:
• Designed for reliability per NAVSO-P3641-A guidelines
• Designed with components derated per:
— MIL-HDBK-1547A
— NAVSO P-3641A
Qualification Process
MQFL series converters are qualified to:
• MIL-STD-810F
— 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
In-Line Manufacturing Process
• AS9100 and ISO 9001 certified facility
• Full component traceability
• Temperature cycling
• Constant acceleration
• 24, 96, 160 hour burn-in
• Three level temperature screening
Product# MQFL-28E-12D
Phone 1-888-567-9596
DesigneD & ManufactureD in the usa
featuring Qorseal® hi-rel asseMbly
Features
•
•
•
•
•
•
•
•
Fixed switching frequency
No opto-isolators
Parallel operation with current share
Clock synchronization
Primary and secondary referenced enable
Continuous short circuit and overload protection
Input under-voltage and over-voltage shutdown
Output voltage trim
Specification Compliance
MQFL series converters (with MQME filter) are designed to meet:
• MIL-HDBK-704-8 (A through F)
• RTCA/DO-160 Section 16, 17, 18
• MIL-STD-1275 (B, D)
• DEF-STAN 61-5 (part 6)/(5, 6)
• MIL-STD-461 (C, D, E, F)
• RTCA/DO-160(E, F, G) Section 22
www.SynQor.com
Doc.# 005-0005293 Rev. F
01/05/16
Page 1
MQFL-28E-12D
Output: ±12V
Current: 10A Total
Technical Specification
BLOCK DIAGRAM
REGULATION STAGE
ISOLATION STAGE
CURRENT
SENSE
1
POSITIVE
INPUT
T1
T1
T2
7
POSITIVE
OUTPUT
T2
2
8
ISOLATION BARRIER
INPUT
RETURN
3
CASE
GATE DRIVERS
UVLO
OVSD
CURRENT
LIMIT
4
T1
OUTPUT
RETURN
T2
9
NEGATIVE
OUTPUT
GATE DRIVERS
12
MAGNETIC
ENABLE 1
PRIMARY
CONTROL
5
ENABLE 2
DATA COUPLING
SYNC OUTPUT
11
SECONDARY
CONTROL
SHARE
10
6
TRIM
SYNC INPUT
BIAS POWER
CONTROL
POWER
TRANSFORMER
POSITIVE
OUTPUT
TYPICAL CONNECTION DIAGRAM
28 Vdc
+
--open
means
on
1
+VIN
2
IN RTN
3
CASE
4
ENA 1
5
SYNC OUT
6
SYNC IN
ENA 2 12
SHARE 11
MQFL
TRIM 10
-VOUT 9
open
means
on
+
Load
--
OUT RTN 8
+VOUT 7
+
Load
--
Product# MQFL-28E-12D
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005293 Rev. F
01/05/16
Page 2
MQFL-28E-12D
Output: ±12V
Current: 10A Total
Technical Specification
MQFL-28E-12D ELECTRICAL CHARACTERISTICS
Parameter
Min. Typ. Max. Units Notes & Conditions
Vin=28V dc ±5%, +Iout = -Iout = 5A, CL=0µF, free
running (see Note 10) unless otherwise specified
Specifications subject to change without notice
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Reverse Bias (Tcase = 125ºC)
Reverse Bias (Tcase = -55ºC)
Isolation Voltage
Continuous
Transient (≤100µs)
Operating Case Temperature
Storage Case Temperature
Lead Temperature (20s)
Voltage at ENA1, ENA2
INPUT CHARACTERISTICS
Operating Input Voltage Range (continuous)
Operating Input Voltage Range (transient, 1s)
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
Input Filter Component Values (L\C)
Maximum Input Current
No Load Input Current (operating)
Disabled Input Current (ENA1)
Disabled Input Current (ENA2)
Input Terminal Current Ripple (peak to peak)
OUTPUT CHARACTERISTICS
Output Voltage Set Point (Tcase = 25ºC)
Positive Output
Negative Output
Output Voltage Set Point Over Temperature
Positive Output
Negative Output
Positive Output Voltage Line Regulation
Positive Output Voltage Load Regulation
Total Positive Output Voltage Range
Output Voltage Cross Regulation
Output Voltage Ripple and Noise Peak to Peak
Total Operating Current Range
Single Output Operatin 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
Output Voltage Rise Time
Output Voltage Overshoot
Turn-On Delay, Rising Vin
Turn-On Delay, Rising ENA1
Turn-On Delay, Rising ENA2
Product# MQFL-28E-12D
-500
-800
-55
-65
-1.2
100
100
-0.8
-1.2
V
V
V
V
500
800
125
135
300
50
V
V
°C
°C
°C
V
16
16
28
28
70
80
V
V
14.75
13.80
0.50
15.50
14.40
1.10
16.00
15.00
1.80
V
V
V
90.0
82.0
3.0
95.0
100.0
86.0
90.0
9.0
15.0
2.0\24.6
9.5
110
160
2
5
25
50
40
60
V
V
+11.82 +12.00 +12.18
-12.19 -12.00 -11.82
-20
0
20
50
65
80
11.76 12.00 12.24
200
325
600
20
80
0
10
0
8
0
120
10.5
11.5
12.5
10.5
12.1
13.4
3.2
10
60
3,000
V
V
mV
mV
V
mV
mV
A
A
W
A
A
A
mA
µF
-750
-500
-500
-400
400
50
750
200
mV
mV
µs
250
500
500
500
mV
mV
µs
6
0
5.5
3.0
1.5
10
2
8.0
6.0
3.0
ms
%
ms
ms
ms
Phone 1-888-567-9596
(see Note 14)
See Note 1
Input/Output to Case, Input to Output
HB Grade Products, See Notes 2 & 17
1, 2, 3
See Note 3
1, 2, 3
1, 2, 3
See Note 16
V
V
V
μH\μF Internal Values
A
Vin = 16V; +Iout = -Iout = 5A
mA
mA
mA
mA
Bandwidth = 100kHz – 10MHz; see Figure 20
+11.88 +12.00 +12.12
-12.12 -12.00 -11.88
Group A
Subgroup
See Note 5
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
See Note 12
1
1
See Note 12
See Note 12
+Vout@(+Iout= -Iout=0A) - +Vout@(+Iout= -Iout=5A); See Note 12
See Note 12
-Vout@(+Iout=-Iout=2A) - -Vout@(+Iout=8A, -Iout=2A); See Notes 11,12
Bandwidth = 100kHz - 10MHz; CL=11µF on both outputs
(+Iout) + (-Iout)
Maximum +Iout or -Iout
Total on both outputs
+Iout + -Iout; +Iout = -Iout; See Note 4
+Vout ≤ 1.2V
Total on both outputs
See Note 6
Total Iout step = 5A‹-›10A, 1A‹-›5A; CL=11µF on both outputs
“
See Note 7
See Note 8
Vin step = 16V ‹-› 50V; CL=11µF on both outputs
“
See Note 7
+Vout = 1.2V-›10.8V
Doc.# 005-0005293 Rev. F
4, 5, 6
4, 5, 6
4, 5, 6
See Note 5
4, 5, 6
4, 5, 6
4, 5, 6
ENA1, ENA2 = 5V; See Note 9
ENA2 = 5V
ENA1 = 5V
www.SynQor.com
2, 3
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
1, 2, 3
1, 2, 3
See Note 5
01/05/16
Page 3
MQFL-28E-12D
Output: ±12V
Current: 10A Total
Technical Specification
MQFL-28E-12D ELECTRICAL CHARACTERISTICS (Continued)
Parameter
Min. Typ. Max. Units Notes & Conditions
Specifications subject to change without notice
Vin=28V dc ±5%, +Iout = -Iout = 5A, CL=0µF, free
running (see Note 10) unless otherwise specified
Group A
Subgroup
(see Note 14)
EFFICIENCY
Iout = 10A (16Vin)
84
88
%
Iout = 5A (16Vin)
87
90
%
Iout = 10A (28Vin)
84
88
%
1, 2, 3
Iout = 5A (28Vin)
86
90
%
Iout = 10A (40Vin)
83
87
%
Iout = 5A (40Vin)
85
88
%
Iout = 10A (70Vin)
79
84
%
Load Fault Power Dissipation
18
31
W
Iout at current limit inception point; See Note 4
1
Short Circuit Power Dissipation
21
32
W
+Vout ≤ +1.2V; -Vout ≥ -1.2V
1
ISOLATION CHARACTERISTICS
Isolation Voltage
Dielectric strength
Input RTN to Output RTN
500
V
1
Any Input Pin to Case
500
V
1
Any Output Pin to Case
500
V
1
Isolation Resistance (input rtn to output rtn)
100
MΩ
1
Isolation Resistance (any pin to case)
100
MΩ
1
Isolation Capacitance (input rtn to output rtn)
44
nF
1
FEATURE CHARACTERISTICS
Switching Frequency (free running)
500
550
600
kHz
1, 2, 3
Synchronization Input
Frequency Range
500
700
kHz
1, 2, 3
Logic Level High
2.0
10
V
1, 2, 3
Logic Level Low
-0.5
0.8
V
1, 2, 3
Duty Cycle
20
80
%
See Note 5
Synchronization Output
Pull Down Current
20
mA
VSYNC OUT = 0.8V
See Note 5
Duty Cycle
25
75
%
Output connected to SYNC IN of other MQFL unit
See Note 5
Enable Control (ENA1 and ENA2)
Off-State Voltage
0.8
V
1, 2, 3
Module Off Pulldown Current
80
µA
Current drain required to ensure module is off
See Note 5
On-State Voltage
2
V
1, 2, 3
Module On Pin Leakage Current
20
µA
Imax drawn from pin allowed, module on
See Note 5
Pull-Up Voltage
3.2
4.0
4.5
V
See Figure A
1, 2, 3
Output Voltage Trim Range
-1.5
0.5
V
(+Vout) - 12V; See Figure E
See Note 5
RELIABILITY CHARACTERISTICS
Calculated MTBF (MIL-STD-217F2)
GB @ Tcase = 70ºC
2800
103 Hrs.
AIF @ Tcase = 70ºC
420
103 Hrs.
WEIGHT CHARACTERISTICS
Device Weight
79
g
Electrical Characteristics Notes
1. Converter will undergo input over-voltage shutdown.
2. Derate output power for continuous operation per Figure 5. 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 ≥ 10µs.
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 ≥ 100µs.
9. Input voltage rise time ≤ 250µs.
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. The regulation stage operates to control the positive output. The negative output displays cross regulation.
12. All +Vout and -Vout voltage measurements are made with Kelvin probes on the output leads.
13. SHARE pin outputs a power failure warning pulse during a fault condition. See Current Share section.
14. 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 Construction and
Environmental Stress Screening Options table for details.
15. These derating curves apply for the ES and HB grade products. The C- grade product has a maximum case temperature of 70ºC.
16. Input Over Voltage Shutdown test is run at no load, full load is beyond derating condition and could cause damage at 125ºC.
17. 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-28E-12D
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005293 Rev. F
01/05/16
Page 4
MQFL-28E-12D
Output: ±12V
Current: 10A Total
Technical Figures
25
100
95
20
Power Dissipation (W)
Efficiency (%)
90
85
80
75
70
16
28
40
70
65
60
0
12
24
36
48
60
72
84
96
Vin
Vin
Vin
Vin
108
15
10
16
28
40
70
5
0
120
0
20
40
Total Output Power (W)
120
20
18
95
16
Power Dissipation (W)
90
Efficiency (%)
100
Figure 2: Power dissipation vs. output power, from zero load to full load with
equal load on the +12V and -12V outputs at minimum, nominal, and maximum
input voltage at 25°C.
100
85
80
75
16 Vin
70
28 Vin
14
12
10
8
6
2
70 Vin
8/0
7/1
6/2
5/3
4/4
3/5
2/6
1/7
16
28
40
70
4
40 Vin
65
0
0/8
8/0
Load Current (A), +Iout / -Iout
95
18
90
16
Power Dissipation (W)
20
85
80
75
16
28
40
70
65
60
-55ºC
25ºC
Vin
Vin
Vin
Vin
4/4
3/5
2/6
1/7
0/8
12
10
8
16
28
40
70
6
125ºC
4
-55ºC
25ºC
Vin
Vin
Vin
Vin
125ºC
Case Temperature (ºC)
Figure 5: Efficiency at 60% load (3A load on +12V and 3A load on -12V) versus
case temperature for Vin = 16V, 28V, and 70V.
Phone 1-888-567-9596
5/3
14
Case Temperature (ºC)
Product# MQFL-28E-12D
6/2
Figure 4: Power dissipation vs. output current, with total output current fixed at
80% load (96W) and loads split as shown between the +12V and -12V outputs at
minimum, nominal, and max input voltage at 25°C.
100
70
7/1
Vin
Vin
Vin
Vin
Load Current (A), +Iout / -Iout
Figure 3: Efficiency vs. output current, with total output current fixed at 80% load
(96W) and loads split as shown between the +12V and -12V outputs at minimum,
nominal, and maximum input voltage at 25°C.
Efficiency (%)
80
Total Output Power (W)
Figure 1: Efficiency vs. output power, from zero load to full load with equal load
on the +12V and -12V outputs at minimum, nominal, and maximum input voltage
at 25°C.
60
60
Vin
Vin
Vin
Vin
Figure 6: Power dissipation at 60% load (3A load on +12V and 3A load on -12V)
versus case temperature for Vin =16V, 28V, and 70V.
www.SynQor.com
Doc.# 005-0005293 Rev. F
01/05/16
Page 5
MQFL-28E-12D
Output: ±12V
Current: 10A Total
Technical Figures
12.4
12.3
-12.3
12.3
-12.3
12.2
-12.2
12.2
-12.2
12.1
-12.1
12.1
-12.1
12.0
-12.0
12.0
-12.0
11.9
-11.9
11.9
-11.9
11.8
-11.8
11.8
-11.8
11.7
-11.7
11.7
-11.6
11.6
+Vout
-Vout
11.5
8/ 2
6/ 4
5/ 5
-11.6
6/ 2
4/ 4
-11.5
0/ 8
2/ 6
+IOUT (A) / -IOUT (A)
Figure 7: Load regulation vs. load current with power fixed at full load (120W)
and load currents split as shown between the +12V and -12V outputs, at nominal
input voltage and Tcase = 25ºC.
Figure 8: Load regulation vs. load current with power fixed at 80% load (96W)
and load currents split as shown between the +12V and -12V outputs, at nominal
input voltage and Tcase = 25ºC.
-12.5
12.5
-12.4
12.4
12.3
-12.3
12.3
-12.3
12.2
-12.2
12.2
-12.2
12.1
-12.1
12.1
-12.1
12.0
-12.0
12.0
-12.0
11.9
-11.9
11.9
-11.9
11.8
-11.8
11.8
-11.8
11.7
-11.7
11.7
-11.6
11.6
-11.5
11.5
Input voltage has virtually no
effect on cross regulation
12.4
+Vout
11.6
11.5
-Vout
0
24
48
72
96
120
Positive Output (V)
12.5
Positive Output (V)
-11.7
-Vout
+IOUT (A) / -IOUT (A)
-12.5
Input voltage has virtually no
effect on cross regulation
-11.7
-11.6
-Vout
0
24
48
72
96
120
-11.5
Total Output Power (W)
Figure 9: Load regulation vs. total output power from zero to to full load where
+Iout equals three times -Iout at nominal input voltage and Tcase = 25ºC.
Figure 10: Load regulation vs. total output power from zero to to full load where
-Iout equals three times +Iout at nominal input voltage and Tcase = 25ºC.
14
10
120
12
8
96
6
72
Tmax = 105ºC, Vin = 70
48
Tmax = 105ºC, Vin = 50
Tmax = 105ºC, Vin = 28
Output Voltage (V)
144
Pout (W)
12
4
-12.4
+Vout
Total Output Power (W)
Iout (A)
-12.4
+Vout
11.5
8/ 0
-11.5
2/ 8
4/ 6
-12.5
Input voltage has virtually no
effect on cross regulation
Negative Output (V)
Positive Output (V)
11.6
Positive Output (V)
12.5
-12.4
Input voltage has virtually no
effect on cross regulation
12.4
Negative Output (V)
-12.5
12.5
10
8
6
4
Tmax = 125ºC, Vin = 70
Tmax = 125ºC, Vin = 50
2
24
Tmax = 125ºC, Vin = 28
2
Tmax = 145ºC, Vin = 50
0
Tmax = 145ºC, Vin = 28
25
35
45
55
65
75
85
95
105
115
125
135
145
0
0
Figure 11: Total Output Current / Total Output Power derating curve as a function
of Tcase and the maximum desired power MOSFET junction temperature (see Note
15).
Product# MQFL-28E-12D
Phone 1-888-567-9596
0
2
4
6
8
10
12
14
Load Current (A)
Case Temperature (ºC)
Figure 12: Positive output voltage vs. total load current, evenly split, showing
typical current limit curves at Vin = 28V.
www.SynQor.com
Doc.# 005-0005293 Rev. F
01/05/16
Page 6
MQFL-28E-12D
Output: ±12V
Current: 10A Total
Technical Figures
Figure 13: Turn-on transient at full rated load current (resistive load) (5ms/div).
Input voltage pre-applied. Ch 1: +Vout (5V/div); Ch 2: -Vout (5V/div); Ch 3:
Enable1 input (5V/div).
Figure 14: Turn-on transient at zero load current (5ms/div). Input voltage preapplied. Ch 1: +Vout (5V/div); Ch 2: -Vout (5V/div); Ch 3: Enable1 input (5V/div).
Figure 15: Turn-on transient at full rated load current (resistive load) (5ms/div).
Input voltage pre-applied. Ch 1: +Vout (5V/div); Ch 2: -Vout (5V/div); Ch 3:
Enable2 input (5V/div).
Figure 16: Turn-on transient at full load, after application of input voltage (ENA
1 and ENA 2 logic high) (5ms/div). Ch 1: +Vout (5V/div); Ch 2: -Vout (5V/div); Ch
3: Vin (10V/div).
Figure 17: Output voltage response to step-change in total load current (50%100%-50%) of total Iout (max) split 50%/50%. Load cap: 1μF ceramic cap and
10μF, 100 mΩ ESR tantalum cap. Ch 1: +Vout (500mV/div); Ch 2: +Iout (5A/div);
Ch 3: -Vout (500mV/div); Ch 4: -Iout (5A/div).
Figure 18: Output voltage response to step-change in total load current (0%-50%0%) of total Iout (max) split 50%/50%. Load cap: 1μF ceramic cap and 10μF, 100
mΩ ESR tantalum cap. Ch 1: +Vout (500mV/div); Ch 2: +Iout (5A/div); Ch 3:
-Vout (500mV/div); Ch 4: -Iout (5A/div).
Product# MQFL-28E-12D
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005293 Rev. F
01/05/16
Page 7
MQFL-28E-12D
Output: ±12V
Current: 10A Total
Technical Figures
Figure 19: 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 (500mV/div); Ch 2: -Vout (500mV/div); Ch 3: Vin (20V/div).
Figure 20: Test set-up diagram showing measurement points for Input Terminal
Ripple Current (Figure 21) and Output Voltage Ripple (Figure 22).
Figure 21: Input terminal current ripple, ic, at full rated output current and
nominal input voltage with SynQor MQ filter module (50mA/div). Bandwidth:
20MHz. See Figure 20.
Figure 22: Output voltage ripple, +Vout (Ch 1) and -Vout (Ch 2), at nominal input
voltage and full load current evenly split (20mV/div). Load capacitance: 1μF
ceramic cap and 10μF tantalum cap. Bandwidth: 10MHz. See Figure 20.
Figure 23: Rise of output voltage after the removal of a short circuit across the
positive output terminals. Ch 1: +Vout (5V/div); Ch 2: -Vout (5V/div); Ch 3: +Iout
(10A/div).
Figure 24: SYNC OUT vs. time, driving SYNC IN of a second SynQor MQFL
converter.
Product# MQFL-28E-12D
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Doc.# 005-0005293 Rev. F
01/05/16
Page 8
MQFL-28E-12D
Output: ±12V
Current: 10A Total
Technical Figures
1
Output Impedance (ohms)
Output Impedance (ohms)
1
0.1
0.01
16Vin
28Vin
0.1
0.01
16Vin
28Vin
40Vin
0.001
10
100
1,000
Hz
10,000
40Vin
100,000
0
0
-10
-10
-20
-20
-30
-40
-50
-60
-70
16Vin
-80
-100
100
1,000
10,000
-70
16Vin
-80
-100
28Vin
40Vin
10
Reverse Transmission (dB)
20
10
0
-10
-20
16Vin
28Vin
100,000
0
-10
-20
-30
10,000
100,000
-50
Hz
16Vin
28Vin
Phone 1-888-567-9596
40Vin
10
100
1,000
10,000
100,000
Hz
Figure 29: Magnitude of incremental reverse transmission from +12V output
(+RT = iin /+iout) for minimum, nominal, and maximum input voltage at full rated
power.
Product# MQFL-28E-12D
10,000
10
-40
40Vin
1,000
1,000
Figure 28: Magnitude of incremental forward transmission of -12V output (-FT =
-vout /vin) for minimum, nominal, and maximum input voltage at full rated power.
20
100
100
Hz
30
10
100,000
-60
30
-50
10,000
-90
100,000
Figure 27: Magnitude of incremental forward transmission of +12V output (+FT
= +vout /vin) for minimum, nominal, and maximum input voltage at full rated
power.
-40
Hz
-50
Hz
-30
1,000
-40
40Vin
10
100
-30
28Vin
-90
Reverse Transmission (dB)
10
Figure 26: Magnitude of incremental output impedance of -12V output (-Zout
= -vout /-iout) for minimum, nominal, and maximum input voltage at full rated
power.
Forward Transmission (dB)
Forward Transmission (dB)
Figure 25: Magnitude of incremental output impedance of +12V output (+Zout
= +vout /+iout) for minimum, nominal, and maximum input voltage at full rated
power.
0.001
Figure 30: Magnitude of incremental reverse transmission from -12V output (-RT
= iin /-iout) for minimum, nominal, and maximum input voltage at full rated power.
www.SynQor.com
Doc.# 005-0005293 Rev. F
01/05/16
Page 9
MQFL-28E-12D
Output: ±12V
Current: 10A Total
Technical Figures
Input Impedance (ohms)
100
10
1
16Vin
0.1
28Vin
40Vin
0.01
10
100
1,000
10,000
100,000
Hz
Figure 31: Magnitude of incremental input impedance (Zin = vin/iin) for
minimum, nominal, and maximum input voltage at full rated power with 50% /
50% split.
Figure 32: High frequency conducted 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 33: High frequency conducted emissions of MQFL-28-05S, 5Vout module
at 120W output with MQME-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-12D
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Page 10
MQFL-28E-12D
Output: ±12V
Current: 10A Total
Application Section
BASIC OPERATION AND FEATURES
The MQFL DC/DC converter uses a two-stage power conversion
topology. The first, or regulation, stage is a buck-converter that
keeps the output voltage constant over variations in line, load,
and temperature. The second, or isolation, stage uses transformers to provide the functions of input/output isolation and
voltage transformation to achieve the output voltage required.
In the dual output converter there are two secondary windings
in the transformer of the isolation stage, one for each output.
There is only one regulation stage, however, and it is used
to control the positive output. The negative output therefore
displays “Cross-Regulation”, meaning that its output voltage
depends on how much current is drawn from each output.
Both the positive and the negative outputs share a common
OUTPUT RETURN pin.
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.
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.
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.
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 provides power to both the input and
output control circuits. Among other things, this bias supply
permits the converter to operate indefinitely into a short circuit
and to avoid a hiccup mode, even under a tough start-up condition.
vided, as well as an input over-voltage shutdown. There is also
an output current limit that is nearly constant as the load impedance decreases to a short circuit (i.e., there is not fold-back
or fold-forward characteristic to the output current under this
condition). When a load fault is removed, the output voltage
rises exponentially to its nominal value without an overshoot.
The MQFL converter’s control circuit does not implement an output over-voltage limit or an over-temperature shutdown.
The following sections describe the use and operation of additional control features provided by the MQFL converter.
CONTROL FEATURES
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 converter’s input return (pin 2). The ENA2 pin (pin 12) is referenced
with respect to the converter’s output return (pin 8). This permits the converter to be inhibited from either the input or the
output side.
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.
Both enable pins are internally pulled high so that an open connection on both pins will enable the converter. Figure A shows
the equivalent circuit looking into either enable pins. It is TTL
compatible.
5.6V
PIN 4
(OR PIN 12)
1N4148
82K
TO ENABLE
CIRCUITRY
ENABLE
250K
2N3904
125K
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 proProduct# MQFL-28E-12D
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MQFL-28E-12D
Output: ±12V
Current: 10A Total
Application Section
SYNCHRONIZATION: The MQFL converter’s switching frequency 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.
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.
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.
The MQFL converter also has a SYNC OUT pin (pin 5). This
output 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.
The SYNC OUT signal is available only when the DC input voltage is above approximately 12V 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.
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
PIN 2
SYNC IN
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
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.
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.
5V
5K
SYNC OUT
FROM SYNC
CIRCUITRY
IN RTN
OPEN COLLECTOR
OUTPUT
PIN 5
PIN 2
Figure C: Equivalent circuit looking into SYNC OUT pin with
respect to the IN RTN (input return) pin.
5K
PIN 6
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.
5K
TO SYNC
CIRCUITRY
IN RTN
Figure B: Equivalent circuit looking into the SYNC IN pin with
respect to the IN RTN (input return) pin.
Product# MQFL-28E-12D
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MQFL-28E-12D
Output: ±12V
Current: 10A Total
Application Section
(
Vnom – 2.5 – 2 x Vnom + 5
Rup = 10 x
Vout – Vnom
)
where:
Vnom = the converter’s nominal output voltage,
Vout = the desired output voltage (greater than Vnom), and
Rup is in kiloOhms (kW).
The maximum value of output voltage that can be achieved is
0.5V above the nominal output.
To decrease the output voltage a resistor, Rdown, should be
connected between the TRIM pin and the POSITIVE OUTPUT pin
(pin 7), as shown in Figure D. The value of this resistor should
be determined according to the following equation:
Rdown = 10 x
[
] [
Vnom – 1
Vnom – 2.5 – 5
x
2.5
Vnom – Vout
]
where:
Vnom = the converter’s nominal output voltage,
Vout = the desired output voltage (less than Vnom), and
Rdown is in kiloOhms (kW).
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.
28 Vdc
+
--open
means
on
1
+VIN
2
IN RTN
3
CASE
4
ENA 1
5
SYNC OUT
6
SYNC IN
10,000
Trim Resistance (kOhms)
OUTPUT VOLTAGE TRIM: If desired, it is possible to increase
the MQFL dual converter’s output voltage above its nominal
value. To increase the output voltage a resistor, Rup, should
be connected between the TRIM pin (pin 10) and the OUTPUT
RETURN pin (pin 8), as shown in Figure D. The value of this
resistor should be determined according to the following equation:
1,000
100
Trim Down Configuration
Trim Up Configuration
10
1
-2
-1.5
-1
-0.5
0
0.5
1
Change in Vout (V)
Figure E: Output Voltage Trim Graph
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.
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.
SHUT DOWN: The MQFL converter will shut down in response
to only four conditions: ENA1 input low, ENA2 input low, VIN
input below under-voltage lockout threshold, or VIN input above
over-voltage shutdown threshold. Following a shutdown event,
there is a startup inhibit delay which will prevent the converter
from restarting for approximately 300ms. After the 300ms delay
ENA 2 12
SHARE 11
MQFL
TRIM 10
-VOUT 9
OUT RTN 8
+VOUT 7
open
means
on
+
Rup
Load
Rdown
-+
Load
-Figure D: Typical connection for output voltage trimming.
Product# MQFL-28E-12D
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MQFL-28E-12D
Output: ±12V
Current: 10A Total
Application Section
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.
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 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.
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 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 temperature. 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 thermocouple
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 thermocouple
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 page) is
small compared to the converter’s rated output current.
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.
THERMAL CONSIDERATIONS: Figure 11 shows the
suggested Power Derating Curves for this converter as a
function of the case temperature and the maximum desired
power MOSFET junction temperature. All other components
within the converter are cooler than its hottest MOSFET.
The Mil-HDBK-1547A component derating guideline calls for
a maximum component temperature of 105ºC. Figure 11
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 11. The maximum case temperature
at which the converter should be operated is 135ºC.
Product# MQFL-28E-12D
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MQFL-28E-12D
Output: ±12V
Current: 10A Total
Stress Screening
CONSTRUCTION AND ENVIRONMENTAL STRESS SCREENING OPTIONS
Consistent with
MIL-STD-883F
Screening
C-Grade
ES-Grade
from
( specified
0 °C to +70 °C )
Element Evaluation
HB-Grade
from
from
( -45specified
( -55specified
°C to +100 °C )
°C to +125 °C )
No
Yes
Yes
Yes
Yes
Internal Visual
*
Yes
Temperature Cycle
Method 1010
No
Constant Acceleration
Method 2001
(Y1 Direction)
No
500g
Condition A
(5000g)
Burn-in
Method 1015
24 Hrs @ +125 °C
96 Hrs @ +125 °C
160 Hrs @ +125 °C
Final Electrical Test
Method 5005 (Group A)
+25 °C
-45, +25, +100 °C
-55, +25, +125 °C
Full QorSeal
Full QorSeal
Yes
Yes
QorSeal
QorSeal
Mechanical Seal,
Thermal, and
Coating Process
External Visual
2009
*
Construction Process
Condition B
Condition C
(-55 °C to +125 °C) (-65 °C to +150 °C)
* Per IPC-A-610 Class 3
MilQor® Hi-Rel converters and filters are offered in three variations of environmental stress screening options. All ES-Grade and HB-Grade MilQor
Hi-Rel 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-28E-12D
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MQFL-28E-12D
Output: ±12V
Current: 10A Total
Technical Specifications
MIL-STD-810F Qualification Testing
MIL-STD-810F Test
Fungus
Method
Description
508.5
Table 508.5-I
500.4 - Procedure I
Storage: 70,000 ft / 2 hr duration
500.4 - Procedure II
Operating: 70,000 ft / 2 hr duration; Ambient Temperature
Rapid Decompression
500.4 - Procedure III
Storage: 8,000 ft to 40,000 ft
Acceleration
513.5 - Procedure II
Operating: 15 g
Salt Fog
509.4
Storage
501.4 - Procedure I
Storage: 135°C / 3 hrs
501.4 - Procedure II
Operating: 100°C / 3 hrs
502.4 - Procedure I
Storage: -65°C / 4 hrs
502.4 - Procedure II
Operating: -55°C / 3 hrs
Altitude
High Temperature
Low Temperature
Temperature Shock
503.4 - Procedure I - C Storage: -65°C to 135°C; 12 cycles
Rain
506.4 - Procedure I
Wind Blown Rain
Immersion
512.4 - Procedure I
Non-Operating
Humidity
507.4 - Procedure II
Random Vibration
514.5 - Procedure I
10 - 2000 Hz, PSD level of 1.5 g2/Hz (54.6 grms), duration = 1 hr/axis
516.5 - Procedure I
20 g peak, 11 ms, Functional Shock (Operating no load) (saw tooth)
516.5 - Procedure VI
Bench Handling Shock
Shock
Sinusoidal vibration
Sand and Dust
Product# MQFL-28E-12D
514.5 - Category 14
Aggravated cycle @ 95% RH (Figure 507.5-7 aggravated temp humidity cycle, 15 cycles)
Rotary wing aircraft - helicopter, 4 hrs/axis, 20 g (sine sweep from
10 - 500 Hz)
510.4 - Procedure I
Blowing Dust
510.4 - Procedure II
Blowing Sand
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MQFL-28E-12D
Output: ±12V
Current: 10A Total
Technical Specifications
First Article Testing consistent with MIL-STD-883F
MIL-STD-883F Test
Method
Description
Electrical Tests
5005
Physical Dimensions test
2016
Resistance to Solvents test
2015.13
Solderability test
2003.8
Lead Integrity test
2004.5
Salt Atmosphere test
1009.8
Adhesion of Lead Finish test
2025.4
Altitude Operation test
1001
Condition “C”
ESD Sensitivity
3015.7
Class 2
Stabilization Bake test
1008.2
Condition “C”
Vibration Fatigue test
2005.2
Condition “A”
Random Vibration test
2026
Condition “II K”
Condition “A”
Sequential Test Group #1
Life Test – Steady State test
1005.8
Life Test – Intermittent Duty test
1006
Sequential Test Group #2
Temperature Cycle test
1010.8
Condition “C”
Constant Acceleration test
2001.2
Condition “A”
Thermal Shock test
1011.9
Condition “B”
Temperature Cycle test
1010.8
Condition “C”
Moisture Resistance test
1004.7
With Sub cycle
Mechanical Shock test
2002.4
Condition “B”
Variable Frequency Vibration test
2007.3
Condition “A”
Sequential Test Group #3
Sequential Test Group #4
Product# MQFL-28E-12D
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MQFL-28E-12D
Output: ±12V
Current: 10A Total
Mechanical Diagrams
1
2
3
4
5
6
SEE NOTE 7
+VIN
IN RTN
SHARE
MQFL-28E-12D-X-ES
CASE
TRIM
DC-DC ConvErtEr
28vin ±12vout @ 10A
ENA 1
-VOUT
SYNC OUT
SYNC IN
12
11
10
9
8
7
ENA 2
MADE IN USA
OUT RTN
S/N 0000000 D/C 3205-301 CAGE 1WX10
+VOUT
0.250 [6.35]
1.50 [38.1]
0.040 [1.02]
PIN
2.50 [63.50]
2.760 [70.10]
3.00 [76.2]
0.22 [5.6]
0.228 [5.79]
0.390 [9.91]
SEE NOTE 7
6
+VIN
ENA 2
IN RTN
SHARE
MQFL-28E-12D-U-ES
CASE
TRIM
DC-DC ConvErtEr
28vin ±12vout @ 10A
ENA 1
SYNC OUT
SYNC IN
0.050 [1.27]
0.128 [3.25]
2.96 [75.2]
1
2
3
4
5
0.200 [5.08]
TYP. NON-CUM.
1.260
[32.00]
-VOUT
MADE IN USA
S/N 0000000 D/C 3211-301 CAGE 1WX10
OUT RTN
+VOUT
12
11
10
9
8
7
2.50 [63.5]
2.760 [70.10]
3.00 [76.2]
Case X
0.250 [6.35]
0.200 [5.08]
TYP.
NON-CUM.
1.50 [38.1]
1.260
[32.00]
0.040
[1.02]
PIN
0.050 [1.27]
0.42
[10.7]
0.128 [3.25]
0.22 [5.6]
2.80 [71.1]
0.390 [9.91]
PIN DESIGNATIONS
NOTES
1)
2)
3)
4)
5)
6)
7)
8)
Pins 0.040’’ (1.02mm) diameter
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.
Product# MQFL-28E-12D
Case U
Phone 1-888-567-9596
www.SynQor.com
Pin # Function
1
2
3
4
5
6
Pin # Function
Positive input
Input return
Case
Enable 1
Sync output
Sync input
Doc.# 005-0005293 Rev. F
7
8
9
10
11
12
Positive output
Output return
Negative Output
Trim
Share
Enable 2
01/05/16
Page 18
MQFL-28E-12D
Output: ±12V
Current: 10A Total
Mechanical Diagrams
0.300 [7.62]
0.140 [3.56]
1.150 [29.21]
0.250 [6.35]
TYP
1
2
3
4
5
6
+VIN
ENA 2
IN RTN
SHARE
MQFL-28E-12D-Y-ES
CASE
ENA 1
-VOUT
SYNC OUT
SYNC IN
TRIM
DC-DC ConvErtEr
28vin ±12vout @ 10A
MADE IN USA
S/N 0000000 D/C 3211-301 CAGE 1WX10
OUT RTN
+VOUT
1.750 [44.45]
12
2.000
11
[50.80]
10
1.50
9 [38.1]
8
1.750
7
[44.45]
0.250 [6.35]
0.200 [5.08]
TYP. NON-CUM.
0.040 [1.02]
PIN
0.050 [1.27]
0.22 [5.6]
0.375 [9.52]
2.50 [63.5]
2.96 [75.2]
0.228 [5.79]
0.390 [9.91]
Case Y
Case Z
(variant of Y)
0.250 [6.35]
Case W
(variant of Y)
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]
0.36 [9.14]
0.050 [1.27]
0.22 [5.6]
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
NOTES
1)
2)
3)
4)
5)
6)
7)
8)
Pins 0.040’’ (1.02mm) diameter
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.
Product# MQFL-28E-12D
Phone 1-888-567-9596
www.SynQor.com
Pin # Function
1
2
3
4
5
6
Pin # Function
Positive input
Input return
Case
Enable 1
Sync output
Sync input
Doc.# 005-0005293 Rev. F
7
8
9
10
11
12
Positive output
Output return
Negative Output
Trim
Share
Enable 2
01/05/16
Page 19
MQFL-28E-12D
Output: ±12V
Current: 10A Total
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
Full Size
MQFL-28
16-40Vin Cont.
16-50Vin 1s Trans.*
Dual Output †
1.5V
(1R5S)
1.8V
(1R8S)
2.5V
(2R5S)
3.3V
(3R3S)
5V
(05S)
6V
(06S)
7.5V
(7R5S)
9V
(09S)
12V
(12S)
15V
(15S)
28V
(28S)
5V
(05D)
12V
(12D)
15V
(15D)
40A
40A
40A
30A
24A
20A
16A
13A
10A
8A
4A
24A
Total
10A
Total
8A
Total
40A
40A
40A
30A
24A
20A
16A
13A
10A
8A
4A
24A
Total
10A
Total
8A
Total
40A
40A
40A
30A
20A
17A
13A
11A
8A
6.5A
3.3A
40A
40A
40A
30A
20A
17A
13A
11A
8A
6.5A
3.3A
40A
40A
40A
30A
24A
20A
16A
13A
10A
8A
4A
24A
Total
10A
Total
8A
Total
40A
40A
30A
22A
15A
12A
10A
8A
6A
5A
2.7A
15A
Total
6A
Total
5A
Total
1.5V
(1R5S)
1.8V
(1R8S)
2.5V
(2R5S)
3.3V
(3R3S)
5V
(05S)
6V
(06S)
7.5V
(7R5S)
9V
(09S)
12V
(12S)
15V
(15S)
28V
(28S)
5V
(05D)
12V
(12D)
15V
(15D)
20A
20A
20A
15A
10A
8A
6.6A
5.5A
4A
3.3A
1.8A
10A
Total
4A
Total
3.3A
Total
20A
20A
20A
15A
10A
8A
6.6A
5.5A
4A
3.3A
1.8A
10A
Total
4A
Total
3.3A
Total
10A
10A
10A
7.5A
5A
4A
3.3A
2.75A
2A
1.65A
0.9A
5A
Total
2A
Total
1.65A
Total
10A
10A
10A
7.5A
5A
4A
3.3A
2.75A
2A
1.65A
0.9A
5A
Total
2A
Total
1.65A
Total
Absolute Max Vin = 60V
MQFL-28E
16-70Vin Cont.
16-80Vin 1s Trans.*
Absolute Max Vin =100V
MQFL-28V
16-40Vin Cont.
5.5-50Vin 1s Trans.*
Absolute Max Vin = 60V
MQFL-28VE
16-70Vin Cont.
5.5-80Vin 1s Trans.*
Absolute Max Vin = 100V
MQFL-270
155-400Vin Cont.
155-475Vin 1s Trans.*
Absolute Max Vin = 550V
MQFL-270L
65-350Vin Cont.
65-475Vin 1s Trans.*
Absolute Max Vin = 550V
Single Output
Half Size
MQHL-28
16-40Vin Cont.
16-50Vin 1s Trans.*
Dual Output †
Absolute Max Vin = 60V
MQHL-28E
16-70Vin Cont.
16-80Vin 1s Trans.*
Absolute Max Vin =100V
MQHR-28
16-40Vin Cont.
16-50Vin 1s Trans.*
Absolute Max Vin = 60V
MQHR-28E
16-70Vin Cont.
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 MILHDBK-1547A guidelines.
Product# MQFL-28E-12D
Phone 1-888-567-9596
www.SynQor.com
Doc.# 005-0005293 Rev. F
01/05/16
Page 20
MQFL-28E-12D
Output: ±12V
Current: 10A Total
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:
Input
Voltage
Range
Model
Name
28
28E
28V
28VE
MQFL
MQHL
MQHR
270
270L
MQFL-28E-12D-Y-ES
Output Voltage(s)
Single
Output
Dual
Output
1R5S
1R8S
2R5S
3R3S
05S
06S
7R5S
09S
12S
15S
28S
05D
12D
15D
Package Outline/
Pin Configuration
Screening
Grade
U
X
Y
W
Z
C
ES
HB
APPLICATION NOTES
A variety of application notes and technical white papers can be downloaded in pdf format from the SynQor website.
Contact SynQor for further information and to order:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product# MQFL-28E-12D
978-849-0600
1-888-567-9596
978-849-0602
[email protected]
www.synqor.com
155 Swanson Road
Boxborough, MA 01719
USA
Phone 1-888-567-9596
PATENTS
SynQor holds numerous U.S. patents, one or more of which apply to most of its power converter
products. Any that apply to the product(s) listed in this document are identified by markings on
the product(s) or on internal components of the product(s) in accordance with U.S. patent laws.
SynQor’s patents include the following:
5,999,417
6,222,742
6,545,890
6,594,159 6,731,520
6,894,468
6,896,526
6,927,987
7,050,309
7,072,190
7,085,146
7,119,524
7,269,034
7,272,021
7,272,023
7,558,083
7,564,702
7,765,687
7,787,261
8,023,290
8,149,597
8,493,751 8,644,027
9,143,042
Warranty
SynQor offers a two (2) year limited warranty. Complete warranty information
is listed on our website or is available upon request from SynQor.
www.SynQor.com
Doc.# 005-0005293 Rev. F
01/05/16
Page 21
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