- Interpoint

Crane Aerospace & Electronics Power Solutions
MFX Single Output DC-DC Converters
16 to 50 Volts Input - 50 Watt
Features
• 90% typical efficiency
• Wide input range, 16 to 50 volts
• Transient protection up to 80 volts per MIL-STD-704A
• Fully isolated, magnetic feedback
• -55°C to +125°C operation
• Undervoltage lockout
• Inhibit function
models
Output Voltage (V)
SINGLE
3.3
5
description
The Interpoint® MFX Series™ of high efficiency dc-dc converters
offers a wide input voltage range of 16 to 50 volts and up to 50
watts of output power. The units are capable of withstanding
short term transients up to 80 volts per MIL-STD-704A. The
package is a hermetically sealed, welded metal case. Flanged
and non-flanged models are available.
Converter Design
The MFX converters are switching regulators that use an
active-clamp, single-ended forward converter and synchronous
rectification design with a constant switching frequency of
500 kHz, typical. Isolation between input and output circuits
is provided with transformers in the forward path and in the
feedback control loop.
Higher Power Density
The MFX Series offers a new standard of performance for small
size and high power density. At just 0.426 inches high and a total
footprint of 2.34 in2, this low profile package offers a total power
density of approximately 50 watts per cubic inch.
Low Noise
The MFX converters current mode control system provides
excellent dynamic response and noise rejection. Output voltage
response for a 50% to 100% step load transient is as low as 5%
with a 350 µs, or less, recovery time.
Crane Aerospace & Electronics
Power Solutions – Interpoint Products
10301 Willows Rd. NE, Redmond, WA 98052
+1 425-882-3100 • [email protected]om
www.craneae.com/interpoint
Inhibit Function
MFX converters provide an inhibit terminal that can be used to
disable internal switching, resulting in no output and very low
quiescent input current. The converter is inhibited when an active
low (≤0.8 V – output disabled) is applied to the inhibit pin. The
unit is enabled when the pin, which is internally connected to
a pull-up current source, is left unconnected or is connected to
an open-collector. The open circuit voltage associated with the
inhibit pin is 14 to 18 volts. The inhibit pin may sink up to 4 mA
maximum when driven to an active low condition. See Table 6 on
page 6 for more information.
Short Circuit Protection
MFX Series converters provide short circuit protection by
restricting the output current to approximately 125% of the full
load output current.
Undervoltage Lockout
Undervoltage lockout with hysteresis prevents the units from
operating below approximately 15 volts input voltage to keep
system current levels smooth, especially during initialization or
re-start operations.
Page 1 of 11
MFX Rev AB - 2015.07.23
Crane Aerospace & Electronics Power Solutions
MFX Single Output DC-DC Converters
16 to
50 Volts Input Watt
28 Volt
input – 2550
Watt
Positive
Input
Positive
Output
Gate
Drive
Gate
Drive
Output
Common
Input
Common
Inhibit
Undervoltage
Lockout
Current Transformer
PWM
Controller
Voltage and
Current Control
Primary
VCC
Trim
Sense
Return
Magnetic Feedback
Secondary VCC
Figure 1: MFX Single Block Diagram
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Positive
Sense
Page 2 of 11
MFX Rev AB - 2015.07.23
Crane Aerospace & Electronics Power Solutions
MFX Single Output DC-DC Converters
16 to
50 Volts Input Watt
28 Volt
input – 2550
Watt
Remote sensE
MFX SINGLE OUTPUT CONVERTER
10
Output
Common
Sense
Return
Positive
Input
Positive Sense
11
Positive
Output
Input
Common
3, 4
9
7
A
RL
A
5, 6
REMOTE SENSE CONNECTION
A Make connections at load.
Figure 2: Remote Sense Connection 1
CAUTION: The converter will be permanently damaged if the positive sense (pin 7) is shorted to ground. Damage may also result
if the output common or positive output is disconnected from the load when the remote sense leads are connected to the load.
TRIM
RT
8 Trim
Positive Sense
7
Trim Down
MFX
Sense Return
9
Trim Up
Figure 3: Trim Connection
Table 1: Trim Formulas
Function
Trim Down 3
25° C, Vo = desired output voltage 1, Rt = trim resistor (kΩ)
Nominal Vout
Trim Range
Formula 2
3.3
Trim Up 4
Trim Down 3
Trim Up 4
5
3.3 to 3.0
2.982 – Vo
R = 31.1
T
Vo – 3.311
3.3 to 3.9
3.996 – Vo
R = 23.2
T
Vo – 3.311
5.0 to 4.5
4.409 – Vo
R = 90.2
T
Vo – 5.015
5.0 to 5.5
RT = 72
5.522 – Vo
Vo – 5.015
1. The output voltage may vary by ±5% of the calculated value.
2. If the calculated value is negative, the desired output voltage is outside the allowed trim range.
3. When trimming down do not exceed the maximum current.
4. When trimming up do not exceed the maximum power.
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Page 3 of 11
MFX Rev AB - 2015.07.23
Crane Aerospace & Electronics Power Solutions
MFX Single Output DC-DC Converters
16 to
50 Volts Input Watt
28 Volt
input – 2550
Watt
Pin Out
Inhibit
Pin
Single Output
1
No connection
2
Case Ground
3
Output Common
4
Output Common
5
Positive Output
6
Positive Output
7
Positive Sense
8
Trim
9
Sense Return
10
Positive Input
11
Input Common
12
Inhibit
Leave unconnected
Positive Sense Connect to Positive Output
Trim
Leave unconnected
Sense Return
Connect to Output Common
Table 3: Pins Not in Use
Table 2: Pin Out
Dot on top of case
indicates pin one.
1
2
3
4
5
6
8
7
BOTTOM VIEW
MFX
12
11
10
9
Dotted line outlines flanged package option.
See Figure 6 on page 8 and
Figure 7 on page 9 for dimensions.
Figure 4: MFX Single Pin Out
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Pins not in Use
Page 4 of 11
MFX Rev AB - 2015.07.23
Crane Aerospace & Electronics Power Solutions
MFX Single Output DC-DC Converters
16 to
50 Volts Input Watt
28 Volt
input – 2550
Watt
SMD Numbers
model numbering key
Base Model
Input Voltage
MFX
28 05 S
F / 883
Output Voltage
(R = decimal point, 3R3 = 3.3 Vout)
Standard Microcircuit Drawing
(SMD)
MFX Similar Part
5962-1520401HXC in process
MFX283R3S/883
5962-1520402HXC in process
MFX2805S/883
To indicate the flanged case option change the “X” to “Z” In the SMD
number. The SMD number shown is for Class H screening, non-flanged.
For exact specifications for an SMD product, refer to the SMD drawing.
SMDs can be downloaded from:
http://www.landandmaritime.dla.mil/programs/smcr
Number of Outputs
(S = single)
Case Option
(Non-flanged case has no designator in
this position)
Table 4: SMD Number Cross Reference
Screening
(Standard screening has no designator
in this position.)
Figure 5: Model Numbering Key
To
Category
Base Model and
Input Voltage
Options
MFX28
Fill in for Model #
MFX28
model Number Options
determine the model number enter one option from
each category in the form below.
Output Voltage 1
Number of
Outputs 2
Case Options 3
Screening 4
3R3, 05
S
(non-flanged, leave blank)
(standard, leave blank)
F (flanged)
ES
883
/
Notes
1. Output Voltage: An R indicates a decimal point. 3R3 is 3.3 volts out.
2. Number of Outputs: S is a single output.
3. Case Options: For the standard case, Figure 6 on page 8, leave the case option blank. For the flanged case option, Figure 7 on page 9, insert the letter F
in the Case Option position
4. Screening: For standard screening leave the screening option blank. For other screening options, insert the desired screening level. For more information see
Table 8 on page 10 and Table 9 on page 11.
Table 5: Model Number Options
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Page 5 of 11
MFX Rev AB - 2015.07.23
Crane Aerospace & Electronics Power Solutions
MFX Single Output DC-DC Converters
16 to
50 Volts Input Watt
28 Volt
input – 2550
Watt
Table 6: Operating Conditions, All Models, 25°C case, 28 Vin, 100% load, unless otherwise specified.
MFX Series
All Models
PARAMETER
CONDITIONS
Lead Soldering Temperature
1
10 seconds max.
STORAGE TEMPERATURE 1
CASE OPERATING
FULL POWER
TEMPERATURE
ABSOLUTE
DERATING OUTPUT POWER/CURRENT 1
LINEARLY
ESD RATING
1
1
MIN
TYP
—
—
300
°C
—
+150
°C
-55
—
+125
-55
—
+135
pin to case except case pin
Undervoltage lockout
-55°C to +125°C
CURRENT LIMIT
250 - 499
100
—
—
Rising VIN (Turn on)
Falling VIN (Turn oFF)
13.3
15.3
15.9
13.3
14.3
15.6
—
125
—
%
455
500
545
kHz
—
—
0.8
V
—
4
mA
FREE RUN -55° TO +125°C
INHIBIT ACTIVE LOW (OUTPUT DISABLED)
Do not apply a voltage to the inhibit pin
3
inhibit pin pulled low
2
INHIBIT PIN SOURCE Current
1
—
REFERENCED TO
INHIBIT ACTIVE HIGH (OUTPUT ENABLED)
Megohms
V
INPUT COMMON
INHIBIT PIN CONDITION
EXTERNAL OPEN COLLECTOR OR
Do not apply a voltage to the inhibit pin 3
LEAVE UNCONNECTED
OPEN CIRCUIT PIN VOLTAGE
1
14
16
For mean time between failures (MTBF) contact Applications Engineering
[email protected] +1 425-882-3100 option 7
Notes:
1. Guaranteed by characterization test and/or analysis. Not a production test.
2. Tested with inhibit pin pulled to ground through a diode.
3. An external inhibit interface should be used to pull the inhibit low or
leave it floating. The inhibit pin can be left unconnected if not used.
www.craneae.com/interpoint
V
500 VDC at 25°C
% OF FULL LOAD
CONVERSION FREQUENCY
°C
From 100% at 125°C to 0% at 135°C
Class 1A
ISOLATION: input to output or any
UNITS
-65
MIL-STD-883 Method 3015
MIL-PRF-38534, 3.9.5.8.2
MAX
Page 6 of 11
MFX Rev AB - 2015.07.23
18
V
Crane Aerospace & Electronics Power Solutions
MFX Single Output DC-DC Converters
16 to
50 Volts Input Watt
28 Volt
input – 2550
Watt
Table 7: Electrical Characteristics -55°C to +125°C case, 28 Vin, 100% load, free run, unless otherwise specified.
single output models
MFX283R3S
PARAMETER
CONDITIONS
OUTPUT VOLTAGE
TC = 25°C
OUTPUT CURRENT
OUTPUT POWER
OUTPUT RIPPLE
20 Hz - 10 MHz
LINE REGULATION
MIN
TYP
MFX2805S
MAX
MIN
TYP
MAX
3.26
3.30
3.34
4.95
5.00
5.05
3.20
3.30
3.40
4.85
5.00
5.15
VIN = 16 TO 50 V
TC = -55°C TO +125°C
Units
V
—
—
15.15
—
—
10
A
VIN = 16 TO 50 V
—
—
50
—
—
50
W
TC = 25°C
—
50
100
—
50
100
TC = -55°C TO +125°C
—
50
100
—
50
100
mV p-p
VIN = 16 TO 50
—
1
15
—
1
15
mV
LOAD REGULATION
NO LOAD TO FULL
—
2
30
—
2
30
mV
INPUT VOLTAGE
CONTINUOUS
16
28
50
16
28
50
V
NO LOAD TO FULL
TRANSIENT 1, 2
—
—
80
—
—
80
V
INPUT CURRENT
NO LOAD
—
60
140
—
75
140
mA
INHIBITED
—
3
6
—
3
6
INPUT RIPPLE CURRENT
20 Hz - 10 MHz
—
50
150
—
50
150
EFFICIENCY
TC = 25°C
85
89
—
87
91
—
TC = -55°C TO +125°C
84
88
—
85
89
—
LOAD FAULT 3
POWER DISSIPATION
—
9
16
—
6
16
SHORT CIRCUIT
RECOVERY 1
—
13
20
—
13
20
ms
STEP LOAD RESPONSE 3
TRANSIENT
—
120
300
—
70
250
mV pk
50% - 100% - 50%
RECOVERY
—
150
300
—
190
350
us
STEP LINE Response 1, 3
TRANSIENT
—
50
265
—
80
300
mV pk
16 - 50 -16 V
RECOVERY
—
130
350
—
180
350
µs
START-UP 3, 4
DELAY
—
17
25
—
17
25
ms
FULL LOAD
OVERSHOOT 1
—
0
30
—
0
50
mV pk
CAPACITIVE LOAD
NO EFFECT ON DC
TC = 25°C
PERFORMANCE
—
—
3000
—
—
3000
uF
Notes
1. Guaranteed by characterization test and/or analysis. Not a production test.
2. Up to 80 volt transient per MIL-STD-704 A.
www.craneae.com/interpoint
mA p-p
%
W
3. Recovery and startup times are measured from application of the
transient or change in condition to the point at which VOUT is within
1% of final value.
4. Tested on release from inhibit.
Page 7 of 11
MFX Rev AB - 2015.07.23
Crane Aerospace & Electronics Power Solutions
MFX Single Output DC-DC Converters
16 to 50 Volts Input - 50 Watt
BOTTOM VIEW MFX
Seam Seal
Dot on top of case indicates pin one.
1.115 max. (28.32)
0.955 (24.26)
12
11
10
0.595 (15.11)
0.795 (20.19)
0.155 (3.94)
2
0.195 (4.95)
1
0.040 dia ±0.002
(1.02 ±0.05)
3
4
9
5
6
8
7
1.895 (48.13)
2.095 max. (53.21)
1.695 (43.05)
1.495 (37.97)
1.295 (32.89)
0.995 (25.27)
1.095 (27.81)
0.000
0.24 (6.1)
0.000
0.426 max.
(10.82)
0.000
Weight: 52 grams maximum
Case dimensions in inches (mm)
Tolerance ±0.005 (0.13) for three decimal places
±0.01 (0.3) for two decimal places
unless otherwise specified
CAUTION
Heat from reflow or wave soldering may damage the device.
Solder pins individually with heat application not exceeding 300°C for 10 seconds per pin.
Materials
Header
Cold Rolled Steel/Nickel
Cover
Kovar/Nickel
Pins
#52 alloy/Gold glass compression seal
Gold plating of 50 - 150 microinches included in pin diameter
Seal hole 0.092 ±0.002 (3.05 ± 0.05)
Case H7 MFX S, Rev A 2015.04.21
Please refer to the numerical dimensions for accuracy.
Figure 6: MFX
www.craneae.com/interpoint
Page 8 of 11
MFX Rev AB - 2015.07.23
Crane Aerospace & Electronics Power Solutions
MFX Single Output DC-DC Converters
16 to 50 Volts Input - 50 Watt
BOTTOM VIEW MFX FLANGED
Flanged cases: Designator "F" required in Case Option position of model number
Seam Seal
Dot on top of case indicates pin one.
2 x Dia 0.128 ±0.002
(3.25 ±0.05)
2 x R 0.163 (4.14)
1.115 max. (28.32)
11
10
9
0.995 (25.27)
1.095 (27.81)
3
4
5
6
8
7
1.895 (48.13)
12
0.595 (15.11)
0.155 (3.94)
0.795 (20.19)
0.330 (8.38)
2
0.195 (4.95)
1
1.695 (43.05)
0.955 (24.26)
0.040 dia ±0.002
(1.02 ±0.05)
0.780 (19.81)
(2.762 max. (70.15))
top of header
Flange thickness: 0.060 (1.52)
Base Plate Detail, Edge View
Weight: 52 grams maximum
Case dimensions in inches (mm)
Tolerance ±0.005 (0.13) for three decimal places
±0.01 (0.3) for two decimal places
unless otherwise specified
CAUTION
Heat from reflow or wave soldering may damage the device.
Solder pins individually with heat application not exceeding 300°C for 10 seconds per pin.
Materials
Header
Cold Rolled Steel/Nickel
Cover
Kovar/Nickel
Pins
#52 alloy/Gold glass compression seal
Gold plating of 50 - 150 microinches included in pin diameter
Seal hole 0.092 ±0.002 (3.05 ± 0.05)
Case J7 MFX S, Rev A 2015.04.21
Please refer to the numerical dimensions for accuracy.
Figure 7: MFX Flanged
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Page 9 of 11
MFX Rev AB - 2015.07.23
2.253 (57.72)
2.090.(53.08)
1.495 (37.97)
1.295 (32.89)
0.000
0.163 (4.14)
0.24 (6.1)
0.000
0.426 max.
(10.82)
0.000
Crane Aerospace & Electronics Power Solutions
Crane Aerospace & Electronics Power Solutions
QualityAssuranceandCertification
MFX
Single Output DC-DC Converters
AppLICATIonnoTe
16 to
50
Volts Input Watt
28 Volt
input – 2550
Watt
Table is for reference only. See individual Series' datasheets for specific screening.
eleMent eValuatiOn 1 high reliability /883 (claSS h)
QMl
claSS h
/883
M/S 2
p3
Element Electrical
n
n
Visual
n
n
Internal Visual
n
Final Electrical
n
n
Wire Bond Evaluation
n
n
cOMpOnent-leVel teSt perFOrMed
Notes
1. Element evaluation does not apply to standard and /ES product.
2. M/s = Active components (microcircuit and semiconductor die).
3. P = Passive components, Class H element evaluation. Not applicable to
standard and /ES element evaluation.
8: Element
Evaluation
tabLe 8: eLeMent evaLuation HigHTable
reLiabiLity
DC-DC
Converters anD eMi FiLters /883 (CLass H)
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Page 10 of 14
10 of
11
APP-009Page
Rev AE
- 2015.07.21
MFX Rev AB - 2015.07.23
Crane Aerospace & Electronics Power Solutions
Crane Aerospace & Electronics Power Solutions
QualityAssuranceandCertification
MFX Single Output DC-DC Converters
AppLICATIonnoTe
16 to
50 Volts Input 50 Watt
Table is for reference
only. See
individual Series' datasheets
for specific screening.
enVirOnMental Screening high reliability
Standard, /eS and /883 (claSS h)
nOn-QMl 1
teSt perFOrMed
pre-capInspection,Method2017,2032
QMl 2
Standard
/eS
claSS h
/883
n
n
n
TemperatureCycle(10times)
Method 1010, Cond. C, -65°C to +150°C, ambient
n
Method 1010, Cond. B, -55°C to +125°C, ambient
n
ConstantAcceleration
Method 2001, 3000 g
n
Method 2001, 500 g
n
n3
pInD,TestMethod2020,Cond.A
burn-inMethod1015,+125°Ccase,typical4
96 hours
n
160 hours
n
FinalelectricalTest,MIL-pRF-38534,groupA,
Subgroups 1 through 6, -55°C, +25°C, +125°C case
Subgroups 1 and 4, +25°C case
n
n
n
HermeticityTest
Gross Leak, Cond. C1, fluorocarbon
Fine Leak, Cond. A2, helium
Gross Leak, Dip
n
n
n
n
n
n
n
Finalvisualinspection,Method2009
n
Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534.
Notes
1. standard and es are non-QMl products and may not meet all of the requirements of MIl-PRF-38534.
2. All processes are QMl qualified and performed by certified operators.
3. Not required by DLA but performed to assure product quality.
4. Burn-in temperature designed to bring the case temperature to +125°C minimum. Burn-in is a powered
test.
Table 9:DC-DC
Environmental
Screening
tabLe 9: environMentaL sCreening HigH reLiabiLity
Converters
anD eMi FiLters stanDarD, /es anD /883 (CLass H)
Page 11 of 14
APP-009
Rev AEAll- technical
2015.07.21
MFX Single, MFX Rev AB - 2015.07.23. This revision supersedes all previous releases.
information is believed to be accurate, but
www.craneae.com/interpoint
no responsibility is assumed for errors or omissions. Interpoint is a registered trademark of Crane Co. and MFX Series is a trademark of Crane
Electronics, Inc. Copyright © 1999 - 2015 Crane Electronics, Inc. All rights reserved. www.craneae.com/interpoint
Page 11 of 11