MQBQ-28-28B-Z-ES [SYNQOR]
DC-DC Regulated Power Supply Module,;
| 型号： | MQBQ-28-28B-Z-ES |
| 厂家： | 
SYNQOR WORLDWIDE HEADQUARTERS |
| 描述： | DC-DC Regulated Power Supply Module, |
| 文件： | 总15页 (文件大小：3310K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MQBQ-28-28B
Single Output
HigH Reliability DC-DC ConveRteR
18-40V
16-50V
28V
400W
94.5%@7A / 95.3%@14A
Continuous Input
Transient Input
Output
Output
Efficiency
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.
Design Process
MQBQ series converters are:
D
f
esgManufactureD in the usa
™
• Designed for reliability per 641-A guidelines
• Designed with components dera
— MIL-HDBK-1547
eaturing
Qor
seal
hi
-rel
a
sseMbly
Featurs
— NAVSO P-3641A
d switching frequency
• No opto-isolators
Qualification Pr
• Parallel operation with droop current share
• Clock synchronization
• Continuous short circuit and overload protection
• Input under-voltage and over-voltage shutdown
MQBQ nverters
• MIL-S
— consisRTCA/D0-160
• SynQor’s First Qualificatn
— consitent witMIL-STD-
• SynQor’s Log-Term Store Survty Qucation
• SynQor’s on-oing life test
Specification Compliance
In-Line Manufacturocess
MQBQ series converters are:
MIL-HDBK-704-8 (A through F)
RTCA/DO-160 Section 16
MIL-STD-1275
DEF-STAN 61-5 (part 6)/5
MIL-STD-461 (C, D, E)
RTCA/DO-160 Section 22
• AS9100 ad 1:20d facility
• Full coment tability
• Temperayclin
• Constant action
• 24, 96, 160 hon-in
• Three level tempere screening
Product # MQBQ-28-28B
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006227 Rev. 1
03/28/12
Page 1
MQBQ-28-28B
28V
14A
Output:
Current:
Technical Specification
BLOCK DIAGRAM
SYNC OUT 2
12
+VIN
1
CURRENT
SENSE
IN RTN
CASE
ENA
+VOUT
+VOUT
2
3
4
11
10
9
GATE DRIVERS
CONTROL
POWER
♦ CURRENT LIMIT
♦ SHORT CIRCUIT PROTECTION
♦ DUTY CONTROL
GATE DRIERS
MICRO-
CONTROLLER
♦ OVLO
♦ UVLO
♦ DUTY
OUT RTN
CONTROL
SYNC OUT 1
SYNC IN
5
6
8
7
OUT RTN
OUT RTN
COPLING
TYPICAL COCTIOIAGRAM
1
12
11
10
9
VIN
SYNC OUT 2
+VOUT
2
IN RTN
ASE
+VOUT
+
+
_
MQBQ
4
E
OUT RTN
OUT RTN
OUT RTN
Load
_
VSOURCE
5
6
8
en
o
SYNC OUT 1
SYNC IN
7
Pin 5: Primary Referenced
Pin 12 : Secondary Referenced
Product # MQBQ-28-28B
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006227 Rev. 1
03/28/12
Page 2
MQBQ-28-28B
28V
14A
Output:
Current:
Technical Specification
MQBQ-28-28B ELECTRICAL CHARACTERISTICS
Parameter
Min. Typ. Max. Units Notes & Conditions
Group A
Vin=28Vdc, Pout=400W, Tcase=25°C, Cload=0µ, fe running (see
Note 9) unless otherwise specified.
Subgroup
(see Note 11)
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
60
55
-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
125
135
300
50
V
V
°C
°C
°C
V
Transient (≤100µs)
Operating Case Temperature
Storage Case Temperature
Lead Temperature (20s)
Voltage at ENA
-65
-1.2
INPUT CHARACTERISTICS
Operating Input Voltage Range
“
18
16
28
28
40
50
V
V
uous
t, 1s
S
1, 2, 3
4, 5, 6
Input Under-Voltage Shutdown
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Shutdown Voltage Hysteresis
Input Over-Voltage Shutdown
Turn-Off Voltage Threshold
Turn-On Voltage Threshold
Shutdown Voltage Hysteresis
Maximum Input Current
No Load Input Current (operating)
Disabled Input Current
Input Terminal Current Ripple (pk-pk)
OUTPUT CHARACTERISTICS
Output Voltage Set Point (Tcase = 25ºC)
Input / Output Voltage Ratio
Output Droop
15.5
15.1
0.5
V
V
V
1, 2, 3
1, 2, 3
1, 2, 3
Note 3
52.3
42.5
9.8
V
V
A
m
mA
mA
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
25
Vin = 18.4 V; IoA
Vin = 18V t0V
Vin = 16V to 5V
18
Bandwidth = 100kHz – see Figure 14
2.2
1.
0.05
V
V/V
Ω
Iout
Trasformatio
Iout = 0A to
1
Output Voltage Regulation
Over Line
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\±10.
±0.5\±1.7
TBD
%\V
%\V
\V
Vin = 18V to 40V
Over Load
Vout @ (Iout=0A) - Vout @ (Iout=14A)
Over Temperature
Output Voltage Ripple and Nak to Peak
Operating Output Current Ran
Operating Output Powange
Output DC Current-Leption
Maximum Output Cap
EFFICIENCY
42
Bandwidh = 0MHz; CL=11µF
Vin = 28
n = 18V to 40V
ote 4; Vin = 28V
Iout = half load resistive
0
0
18.0
4
1,0
20.2
A
µF
Iout = 14 A (18.4 Vin)
3.9
5
9
95.
94.7
%
%
%
%
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
Iout = 7 A Vin)
Iout = 1
Iout = 7 A (
Iout = 9.2 A (40
Iout = 7 A (4Vin)
Product # MQBQ-28-28B
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006227 Rev. 1
03/28/12
Page 3
MQBQ-28-28B
28V
14A
Output:
Current:
Technical Specification
MQBQ-28-28B ELECTRICAL CHARACTERISTICS (Continued)
Parameter
Min. Typ. Max. Units Notes & Conditions
Group A
Vin=28Vdc, Pout=400W, Tcase=25°C, Cload=0running (see
Note 9) unless otherwise specified.
Subgroup
(see Note 11)
ISOLATION CHARACTERISTICS
Isolation Voltage
Dielectric strength
Input RTN to Output RTN
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 (pin to case)
Isolation Capacitance (in rtn to out rtn)
FEATURE CHARACTERISTICS
Input/output Ripple Frequency (free running)
Synchronization Input
V
MΩ
MΩ
nF
47
500
548
600
kHz Switching devicealf this fuency
1, 2, 3
Frequency Range
500
2.0
-0.5
20
700
5.5
0.8
80
kHz
V
V
%
1,
1, 2, 3
Logic Level High
Logic Level Low
Duty Cycle
See Note 5
Synchronization Output
Pull Down Current
20
40
A
%
V= 0.8V
See ote 5
See Note 5
Duty Cycle
60
Enable Control (ENA)
Off-State Voltage
µA
V
1, 2, 3
See Note 5
1, 2, 3
See Note 5
1, 2, 3
Module Off Pulldown Current
On-State Voltage
80
2
ent drain required to enodule is
Module On Pin Leakage Current
Pull-Up Voltage
20
4.8
raw from allowed with still on
See Figure A
3.2
4.5
RELIABILITY CHARACTERISTICS
Calculated MTBF (MIL-STD-217F2)
GB @ Tcase = 70ºC
3
TB
10 H.
3
AIF @ Tcase = 70ºC
10 Hrs.
WEIGHT CHARACTERISTICS
Device Weight
7
g
Electrical Characteristics Notes
1. Converter will undergo input over-utdown.
2. Derate output power for continuous Figure 5.
3. High or low state of input voltage must put 200µs to be acon by the shutdown circuitry.
4. Current Limit inception is defined as the point e output voltage opped to 90% of s nominal value. Current limit inception is a function
of input voltage. See Current ssion in FeatuDescriptiosection
5. Parameter not tested ut guarthe limit specified.
6. Load current transie ≥ 10
7. Line voltage transiti100µs
8. Input voltage rise time .
9. Operating the converter aronizion frequebove the free rurequency will cause the converter’s efficiency to be slightly reduced
and it mo cause a sligon in the maxitput current/poavailable. For more information consult the factory.
10. After fault event, e is inhibited from ng for 10msSee Shut Down section of the Control Features description.
11. Only the Eade prodts are testthree tures. C grade products are tested at one temperature. Please refer to the
Construction aental Stress Screptions tdetails.
12. These dering cufor the ESand HBade producC- grade product has a maximum case temperature of 100ºC.
Product # MQBQ-28-28B
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006227 Rev. 1
03/28/12
Page 4
MQBQ-28-28B
28V
14A
Output:
Current:
Technical Specification
100
95
90
85
80
75
70
65
60
100
95
90
85
80
75
70
Vin = 8V
Vin = 28V
0V
Vin = 18.4V
Vin =28V
Vin = 40V
65
60
-55ºC
25ºC
0.0
5.0
10.0
15.0
20.0
Load Current (A)
CTemperatu
Figure 1: Efficiency vs. load current for minimum, nominal, and
Figuficiency vs. ase temperate for mnominal, and
maximum input voltage at Tcase=25°C.
maximvoltage nd 60% rateer.
24
16
12
28
24
20
16
12
8
8
Vin = 18V
Vin = 18V
Vin =28V
4
Vin = 28V
4
Vin = 40V
Vin = 40V
0
0
0.0
5.0
10.0
20.0
-55ºC
25ºC
125ºC
ent (A)
Case Temperature (ºC)
Figure 3: Power dissin vs. lont for minimum, nomi
and maximum input Tcase
4: Power dissipation vs. case temperature for minimum,
nominal, and maximum input voltage and 60% rated power.
450
45
40
35
30
25
20
15
14
12
10
8
300
250
200
150
100
50
6
Tj=145ºC
Tj=125ºC
Tj=1
4
10
Vin = 18.4V
2
Vin = 28V
5
Vin = 40V
0
0
0
25
35
5
65
5
85
95
105 115 125 135 145
0
2
4
6
8
10
12
14
16
18
20
Cse Temperature (ºC)
Load Current (A)
Figure 5: Output cud power derating curves vs. case
Figure 6: Output voltage vs. load current, current limit curves for
minimum, nominal, and maximum input voltage at Tcase=25°C.
temperature at nominal ltage and at T =105°C, 125°C, and
J
145°C.
Product # MQBQ-28-28B
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006227 Rev. 1
03/28/12
Page 5
MQBQ-28-28B
28V
14A
Output:
Current:
Technical Specification
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.
Vin = 18.4V
Vin = 28V
Vin = 40V
41
36
Vin = 18.4V
Vin = 28V
Vin = 40V
31
26
21
16
0
2
4
6
8
10
12
14
16
18
20
0
2
4
6
10
12
14
16
18
20
Load Current (A)
ad Current
Figure 7 Output voltage vs. load current, regulation curves for
Figutput voltagdroop vs. locurrennimum
minimum, nominal, and maximum input voltage at Tcase=25°C.
nominaximum nput voltage ase=25
Figure 9: Turn-on trat at no zero output capacita
initiated by ENA. Ine pre-Ch 1:Vout (10V/div).
Ch2 : ENA (5V/div).
10: Turn-on transient at half resistive load and 500uF output
capance initiated by ENA. Input voltage pre-applied. Ch 1:Vout
(10V/div). Ch 2: ENA (5V/div).
Data Pending
Figure 11: Turn-on t at full resistive load and zero output
capacitance initiated bnput voltage pre-applied. Ch 1:Vout
(10V/div). Ch 2: ENA (5V/)
Figure 12: Turn-on transient at full resistive load and zero output
capacitance initiated by Vin. ENA previously high. Ch1 :Vout (10V/
div). Ch2 : Vin (100V/div)
Product # MQBQ-28-28B
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006227 Rev. 1
03/28/12
Page 6
MQBQ-28-28B
28V
14A
Output:
Current:
Technical Specification
Figure 13: Output voltage response to step-change in load current
50%-100%-50% of Iout (max). Load capacitance: 1uF ceramic and
10uF 100mΩ ESR tantalum. Ch 1: Vout (500mV/div). Ch 2: Iout
(10A/div).
FigOutput voltae response to tep-chload current
10%-% of Iout max). Load acitancceramnd
10uF 1R tantalum. Ch 1: Vo0mV/div2: Iout
(10A/div).
See
See
Figure
18
Data Pending
Fgure
17
MQME
lter
MQBQ
onverter
VOUT
VSOURCE
Figure 15: Output vsponschange in input voltag
230V-400V-230V in 25d capae: 1uF ceramic and
10uF 100mΩ ESR tantaluVin (V/div). Ch Vout
(500mV/div)
F6: Test set-up diagram showing measurement points for
input terminal current ripple (Figure 17) and output voltage ripple
Figure 18).
Figure 17: Input termrrent ripple, i at full load and nominal
input voltage with SynQofilter module (50mA/div). Bandwidth:
20MHz. See Figure 16.
Figure 18: Output voltage ripple, Vout, at nominal input voltage and
full load (50mV/div). Bandwidth: 20MHz. Load capacitance: 1uF
ceramic and 10uF 100mΩ ESR tantalum. See Figure 16.
c
Product # MQBQ-28-28B
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006227 Rev. 1
03/28/12
Page 7
MQBQ-28-28B
28V
14A
Output:
Current:
Technical Specification
Data Pending
Figure 19: Rise of output voltage after the removal of a short circuit
across the output terminals. Rshort = 5mΩ. Ch 1: Vout (10V/div).
Ch 2: Iout (20A/div). Bandwidth: 20MHz.
Product # MQBQ-28-28B
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006227 Rev. 1
03/28/12
Page 8
MQBQ-28-28B
28V
14A
Output:
Current:
Technical Specification
BASIC OPERATION AND FEATURES
CONTROL FEATURES
ENABLE: The MQFL converter has one enable pin. The enable
pin must have a logic high level for tverter to be enabled. A
logic low will inhibit the converter.
The MQBQ Bus Converters use full bridge power conversion stage
to implement a DC transformer. The output voltage is proportional
to the input voltage by the transformer turns ratio. During steady
state operation, the primary and secondary switching devices
operate with effectively 50 % duty cycle (there is not PWM action).
The full bridge stage switches at a fixed frequency for predictable
EMI performance. 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.
The ENA pin (pin 4) is referwith reo the converter’s
input return (pin 2).
The enable pin can be d to tuain per stage on and
off, but the bias supply is not controhe enable pin. If the
input voltage is abe input under voltakout, the as supply
will turn on and on uthe input oltage drops below this
voltage.
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 MQBQ converter have
such high efficiency.
The enable is intelled hiso that annection
on the pin will eable thter. Figure A shows t
circuit ooking into the enan (primary referenced). It
comple.
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 nega
load current to flow back into the converter’s output termi
the load is a source of short or long term energy. The MQBQ
converters do not limit the negative current that can flow from the
load back to the source. Operation in this mode foa prolonged
time is not recommended.
There is a control circuit on both the input and outpthe
MQBQ converter that determines the conduction state of t
switches. These circuits communicate wieach othr acr
isolation barrier through a magnetically copled deviceNo op
isolators are used.
SHUT N: The MQBQ converwill shn in reponse
o only ditions: ENA input VIN inelow under-
voltage lochold, VIN put aver-volshutdown
threshold, or a prolonged urrent t circcondition.
a shutdown event, tha startbit delay which
the converter fom resfor approximately 250ms.
After the 250ms dellapses, if the le input is high and the
input voltage is withiperating range converter will restart.
If the VIN input broown to neay 0V and back into the
oerating range, there is tup inhibit, and the output voltage
will rise arding to the “Turelay, Rising Vin” specification.
A separate bias supply provides pboth the input anoutput
control circuits. Among other thins supply permits the
converter to operate indefinitely into a uit (hic-cup type
operation).
An input under-voltage lockre with hysteresis is proed,
as well as an input ovoltagwn. There is also at
current limit that is nstant oad impedance decre
to a short circuit.
TQ is wed to run in current lim
mode for a short time beting own. Whload fault is
removed ae fault inhibit s elapsed, the rter will go
through itoft start seqce.
5.6V
The MQBQ coontrol circuit doemplemever-
temperature hutdo
82K
The following ections dribe the uopetif addinal
control features rovided by the MQBerter.
1N4148
PIN 4
ENABLE
TO ENABLE
CIRCUITRY
250K
125K
2N3904
PIN 2
IN RTN
Figure A: Circuit diagram shown for reference only, actual
circuit components may differ from values shown for
equivalent circuit.
Product # MQBQ-28-28B
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006227 Rev. 1
03/28/12
Page 9
MQBQ-28-28B
28V
14A
Output:
Current:
Technical Specification
5V
SYNCHRONIZATION:
The MQBQ 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.
5K
SYNC OUT 1
5V
From SYNC
CIRCUITRY
PIN 5
Co
Outpu
5K
To SYC
CIRCUIRY
PIN 6
PIN 2
S
RTN
If the MQBQ 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.
rimary ref
Synchronization Interf
If, due to a fault, the SYNC IN pin is held in either a logic low or
logic high state continuously, the MQBQ converter will revert to its
free-running frequency.
Figure SYNC IN / SYNC OU(1) equivaircuits referenced
to the return pin N RTN).
The MQBQ converter also has two SYNC OUT pins (pin 5 and
pin 12). The SYNC OUT 1 signal (primary referenced) can be
used to drive the SYNC IN pins of as many as ten (10) other M
converters. The pulse train coming out of SYNC OUT 1 has
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 synchronzation signal
at the SYNC IN pin, or the synchronization freqthere is.
SYNC OUT is also available referenced to the secoe on
pin 12 (referenced to output return; pins 7, 8, or 9). T
OUT 2 signal can be used to synchronize down stream con
connected to the output bus.
5V
OPEN
COLLECTOR
OUTP
ST 2
From SYNC
CIRCUITRY
PIN
12
OUT RTN
PINS
7,8,9
Seconerenced
Synchronerface
Fire C: Equvalenooking into SYNC OUT 2 pin with
The SYNC OUT signal is available when he DC inpuvoltage
is above the input under voltage when the converter is
not inhibited through the ENA pin.
respect to the OUT RToutput return) pin.
NPUT OVER-VOLTAGE SHUTDOWN: The MQBQ converter
has an oer-voltage feature that ensures the converter will be
e input oltage is too high. It also has a hysteresis and time
densure proper operation.
INPUT SYSTEM INSTABILITY: This condition can occur because
y DC/DC converter appears incrementally as a negative
nce load. A detailed application note titled “Input System
Iability” is available on the SynQor website which provides an
understanding of why this instability arises, and shows the preferred
solution for correcting it.
NOTE: An MQBQ convt has its SYNN pin (prmary
referenced) driven by the SYpin (primary refereof
a second MQBQ cer will start of its switching
delayed approximatdegreative to that of the sec
converter.
Figure B shows the equivauit loking into YNC IN pin
/ SYNC pin reference primary. Figshows the
equivalent ing into thYNC OUT 2 pin (sery side
reference).
CURRENT SHAREmost Bus nverteseveral M's
can be placed n paralleo achieve ehigoad power
or N+1 redundacy. As long athe Mhare, the same
input source and put load, the total load enly it between
MQBQ's as a result of its natural voltage droacteristic.
THERMAL CONSIDERATIONS: Figure 5 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 component, which at full power is no more than 20ºC
higher than the case temperature directly below this component.
The Mil-HDBK-1547A component derating guideline calls for a
maximum component temperature of 105ºC. Figure 5 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 UNDER-VOLTAOCKOUT: The MQBQ converter
has an under-voltage lockoure that esures the converter will
be off if the input e is too The theshold of input voltage
at which the onvertl turn oher that the threshold at
which it wioff. addition, the MQBQ converter will not
respond to a f the input voltage unless it has remained in
that state for morabout 200µs. This hysteresis and the delay
ensure proper operhen the source impedance is high or in
a noisy environment.
Product # MQBQ-28-28B
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006227 Rev. 1
03/28/12
Page 10
MQBQ-28-28B
28V
14A
Output:
Current:
Technical Specification
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.
The Mil-HDBK-1547A component derating guideline calls for a
maximum component temperature of 105ºC. Figure 5 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 temperat
145ºC is permissible, but not recommended for long-term opera
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 oper135ºC.
REVERSE CURRENT OPERATION: Converters that uTs
as synchronous rectifiers are capable of drawing a negative
from the load if the load is a source of srt- or long-erm ene
This negative current is referred to as a “back-drive current”.
Conditions where back-drive curreht occr include pralleled
converters that do not employ cu, or where thcurrent
share feature does not adequately ring during the
startup or shutdown transitions. It can also hen converters
having different output vole connected gether thugh
either explicit or paraic diowhile normally off, e
conductive during sr shutdinally, some loads, su
motors, can return eneeir poail. Even a load capacit
is a source of back-drive for sme period time during a
start-up ana shutdown .
During steoperation tMQBQ converters t have
any protection hat would limit ack-drivent.
Therefore, the MQule will llow mited amf
current to flow rom the put to the ourcthe ouut is
raised above thexpected steady state e for ven input
voltage. Prolongd operation he MQBverter his mode
can result in permanent damage. The MQBvertrs do have
the necessary circuitry to rt-up and shut dowo a back-drive
condition (preexisting vat the output pins, as long as the
voltage at the output does xceed the expected steady state
output voltage for given inltage.
Product # MQBQ-28-28B
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006227 Rev. 1
03/28/12
Page 11
MQBQ-28-28B
28V
14A
Output:
Current:
Technical Specification
Consistent withMIL-STD-
C-Grade(-40 ºC to +100
ºC)
ES-Grade(-55 ºC to +1
ºC)(Element Evaluation)
rade(-55 ºC to +125
ment Evaluation)
Screening
883F
Internal Visual
Yes
No
Y
Yes
*
CB(-5C to
ºC)
ndition C(-6ºC to
+150 ºC)
Temperature Cycle
Constant Acceleration
Burn-in
Method 1010
Method 2001(Y1
Direction)
No
500
96 Hrs +125 ºC
-45, +25, +100
Fueal
Yes
Condition A(50
160 125 º
5, +125 ºC
Full QorSeal
Yes
Method 1015Load Cycled•
10s period• 2s @ 100%
Load• 8s @ 0% Load
24 Hrs @ 25 ºC
Final Electrical Test
Method 5005(Group A)
Mechanical Seal,
Thermal, and Coating
Process
Full QorSeal
External Visual
200
Construction Process
QorSeal
Qal
QorSeal
* Per IPC-AClass 3
MilQor converters ad filteered in three variatif envintal strss screening options. All MilQor converters use
SynQor’s proprieorSealel assembly procesincludarylene-C coating of the circuit, a high performance
thermal compound nd a nbarrier gold plated alm case. Each successively higher grade has more stringent
mechanical and electring, awell as a lger burn-in cye ES- and HB-Grades are also constructed of components
that haven procured an element tion process pre-qualifies each new batch of devices.
Product # MQBQ-28-28B
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006227 Rev. 1
03/28/12
Page 12
MQBQ-28-28B
28V
14A
Output:
Current:
Technical Specification
50 [6.35]
+VIN
SYNC OUT 2
+VOUT
1
12
SEE NOTE 7
IN RTN
2
11
1.50 [32.10]
05.08]
TYPNON-CUM.
CASE
MQBQ-28-28B-X-HB
BUS CONVERTER
28VVin 28Vout @ 14A
+VOUT
3
4
5
6
10 1.260
OUT RTN
[32.00]
ENA
9
8
7
MADE IN USA
OUT RTN
OUT RTN
SYNC OUT 1
SYNC IN
0.220 [5.59]
N
S/N 0000000 D/C 3205-301 CAGE 1WX10
2.50 [63.50]
2.76 [70.10]
3.00 [76.20]
0.050 [1.27]
[5.59]
0.28 [3.25]
2.96 [75.2]
[5.79]
0.390 [9.91]
se X
[6.35]
+VIN
2
1
2
3
12
11
SEE NOTE 7
0.200 [5.08]
TYP.
IN RTN
CASE
+V
0 [32.10]
MQB28-28B-U-HB
US CONVETER
Vin 28Vou@ 14A
10 1.260
NON-CUM.
OUT RTN
OUT RTN
OUT RTN
[32.00]
ENA
4
5
8
7
SYNC OUT 1
SYNC IN
MADE IN A
0.040
[1.02]
PIN
S/N 00CAGE 1WX10
6
0.42
[10.7]
2.50 [63.50]
76 [70.10]
0 [76.20]
0.050 [1.27]
0.28 3.25]
0.220 [5.59]
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)
Pins Material: Copper
1
2
3
4
5
6
+ VIN
IN RTN
CASE
ENA
SYNC OUT 1
SYNC IN
7
8
9
OUT RTN
OUT RTN
OUT RTN
Finish: Gold over Nickel
3)
All dimensions ihes (mances: xxx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 i+/-0.2
10 + VOUT
11 + VOUT
12 SYNC OUT 2*
4)
5)
6)
7)
Weight: (78.5 ypical
Workmanshts or exceeds IPC-A-610C Class III
Print Labeling ourface per Product Label Format Drawing
Pin 1 identification t intended for mounting
* Secondary Referenced
Product # MQBQ-28-28B
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006227 Rev. 1
03/28/12
Page 13
MQBQ-28-28B
28V
14A
Output:
Current:
Technical Specification
0.300 [7.62]
1.15 [29.21]
0.140 [3.56]
0.250 [6.35]
TYP
0.250 [6.35]
1
2
3
4
5
6
+VIN
12
11
10
9
SYNC OUT 1
+VOUT
0.200
TYP. N
2.00
[50.80]
IN RTN
CASE
MQBQ-28-28B-Y-HB
BUS CONVERTER
28VVin 28Vout @ 14A
+VOUT
OUT RTN
OUT RTN
OUT RTN
1.50
[38.10]
ENA
SYNC OUT 1
SYNC IN
MADE IN USA
8
1.750
[44.45]
S/N 0000000 D/C 3205-301 CAGE 1WX10
7
0.040 [1.]
PIN
0.0
00 [5.59]
1.750 [44.45]
2.50 [63.50]
0.375 [9.52]
2.96 [75.2]
0.228 [5.7
0.0 [9.91]
Case Y
Case Z
nt of Y)
Case W
(variant of Y)
0.250 [6.35]
0.250 [6.35]
0.420 [10.7]
0.200 [5.08]
YP. NON-CUM.
0.200 [5.08]
TYP. NON-CUM.
0.040 [1.02]
PIN
0.040
PIN
0.220 [5.59]
0 [10.7]
0.050 [1.2
0.050 [1.27]
0.220 [5.59]
.050 [1.27]
2.80 [71.1]
0.390
[9.91]
0.525 [13.33]
0.525 [
0.390
[9.91]
2.80 [71.
PIN DESIGNATIONS
NOTES
1)
Pins 0.040’’ (1.02mm) diameter
Pin # Function
Pin # Function
2)
Pins Material: Copper
Finish: Gold over Nicke
1
2
3
4
5
6
+ VIN
IN RTN
CASE
ENA
SYNC OUT 1
SYNC IN
7
8
9
OUT RTN
OUT RTN
OUT RTN
3)
All dimensions iches (mances: xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 i+/-0.2
10 + VOUT
11 + VOUT
12 SYNC OUT 2*
4)
5)
6)
7)
Weight: (78.5 ypical
Workmansts or exceeds IPC-A-610C Class III
Print Labeling ourface per Product Label Format Drawing
Pin 1 identification t intended for mounting
* Secondary Referenced
Product # MQBQ-28-28B
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006227 Rev. 1
03/28/12
Page 14
MQBQ-28-28B
28V
14A
Output:
Current:
Technical Specification
PART NUMBERING SYSTEM
The part numbering system for SynQor’s MilQor DC-DC converters follows the format shown in the telow.
Output Voltage(s)
Model
Name
Nominal Input Voltage
Range
Package Ou
Pin Configurati
eening
rade
Nominal Output Voltage
28B
U
X
Z
C
ES
28
270
MQBQ
Not all combinations make valid part numbers, please contact SynQor foavailabile Produt Summary wge for mtions.
Example:
8-28B–Y–ES
APPLICATION NOTES
A variety of application notes ahnical white paps can be donloaded in pf t from the SynQor website.
PATENTS
SynQor holds the folwing ents, one or more ch apach poduct listed in this document. Additional patent
applications may ing or in the future.
5,999,417
6,896,52
7,272,02
6,22
6,927,9
,272,023
,545,89
7,050,30
7,558,083
6,577,1
7,072,190
,564,72
6,594,159
7,085,146
7,765,687
6,731,520
7,119,524
7,787,261
6,894,468
7,269,034
8,023,290
Contact SnQor for urther rman:
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 Free88-567-9596
Fax:
849-0602
E-m
eb:
mqae@synqor.com
www.qor.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.
ess155 Swanson Road
Boxborough, MA 01719
USA
Product # MQBQ-28-28B
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006227 Rev. 1
03/28/12
Page 15
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