MFW2812T/ES [CRANE]
3-OUTPUT 60W DC-DC REG PWR SUPPLY MODULE, HERMETIC SEALED PACKAGE-10;
| 型号： | MFW2812T/ES |
| 厂家： | 
Crane Aerospace & Electronics. |
| 描述： | 3-OUTPUT 60W DC-DC REG PWR SUPPLY MODULE, HERMETIC SEALED PACKAGE-10 输出元件 |
| 文件： | 总7页 (文件大小：458K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
mfw SerieS
70 watt
DC/DC Converters
28 volt Input
NOT RECOMMENDED FOR NEW DESIGNS
Features
•
•
•
•
•
•
•
•
•
•
•
–55°C to + 85°C operation
19 to 40 VꢁC input
MꢀꢁELS
VDC Output
Fully Isolated
single
Dual
±12
±15
tRiple
+5 & ±12
+5 & ±15
ꢀptocoupler feedback
Fixed frequency, 245 kHz typical
Topology – Push-Pull Forward
5
12
15
50 V for up to 50 ms transient protection
Inhibit/sync function
Size (max.): 3.20 x 2.46 x 0.595 inches (81.3 x 62.5 x 15.11 mm)
See case L for dimensions.
Indefinite short circuit protection
Remote sense on single models
Up to 84% efficiency
Weight:
140 grams typical
Screening: Standard or ES. See “85°C Non-QML Products–Environmental
Screening (Standard & ES)“ screening table for more information.
description
The MFW Series™ of ꢁC/ꢁC converters offers up to 70 watts of
power from single, dual, or triple outputs in one package. Using hybrid
thick film technology a power density of over 20 watts per cubic inch
is achieved. These devices are packaged in hermetically sealed cold
rolled steel enclosures with a tin plate finish making them ideal for use
in military, aerospace, or other high reliability applications. Unscreened
models are guaranteed to pass a gross leak test (maximum leak rate
of 0.001 atm-cc/sec). Environmentally screened units (designated
by the /ES suffix) are hermetically solder sealed. See Section C2 for
screening specifications.
wiDe VOltage Range
All models of the MFW Series are designed to provide full power
operation over an input voltage range of 19 to 40 VꢁC. ꢀperation
below an input of 19 volts, including operation in MIL-STꢁ-704E emer-
gency power conditions, is possible with derated output power. Please
refer to the derating information and the low voltage drop-out graphs
(Figures 10 and 11) on the following pages.
wiDe teMpeRatuRe Range
Full load operation of any of the MFW Series converters is available
at case temperatures of –55°C to + 85°C. ꢀperation up to +125°C is
possible with derated output power. The MFW Series converters are
provided in a flange mount case designed to facilitate the removal of
internally generated heat. Because of this, heat sinking requirements
are minimal. Sustained full power operation does however require that
an efficient heat sink be attached to the baseplate. Please refer to the
heat sink requirements section for more information.
Design MethODOlOgy
The MFW Series converters utilize a quasi-square wave forward
converter design with a nominal switching frequency of 245 kHz.
Isolation between input and output is provided with a transformer in the
forward power loop and a wideband, temperature insensitive optical
link in the feedback control loop. ꢀutput regulation is accomplished
with constant frequency pulse width modulation. In addition, the load
regulation of the single output models is further enhanced through
the use of remote output voltage sense pins to overcome the adverse
effects of line resistance voltage drops. Short circuit protection is
provided by detecting peak primary switching current on a cycle by
cycle basis and limiting it to approximately 130% of the full load input
current. This method results in quick and positive current limiting under
short circuit conditions.
inhibit/synC FeatuRe
Standard on all models of the MFW Series is a dual mode inhibit/sync
pin. This pin serves as both an output inhibit and as a synchronization
input. In the inhibit mode an open collector TTL compatible low (<0.8
V) will disable internal switching thereby inhibiting the unit’s output.
Inhibiting in this manner results in an extremely low quiescent current.
Since a pull-up resistor is included internally, this pin may be left open
should the inhibit function not be desired.
lOw nOise
The MFW Series converters offer low noise on both the input and
output lines. A two section, four pole LC input filter is included to
provide very low reflected line ripple current. Adherence to MIL-STꢁ-
461C (CE03) is possible with the addition of the FMB-461 filter. ꢀutput
ripple is maintained at less than 50 mV p-p for single and dual output
models and 85 mV for triple output models.
In a digital system it is often desirable to synchronize the input or
output ripple with the system clock. For this reason each model of the
MFW Series was designed to synchronize with a system clock applied
to the inhibit/sync pin. Please refer to the technical data section for
timing details for the external sync feature.
1
mfw SerieS
70 watt
DC/DC Converters
absOlute maximum ratings
oꢀꢁꢂꢀꢁ pꢃwꢄꢅ
sync and inhibit
syꢉꢋ iꢉ (245 ꢁꢃ 370 kHz.)
• 60 to 70 watts depending on model
Lꢄꢆꢇ sꢃlꢇꢄꢅꢈꢉg tꢄmꢂꢄꢅꢆꢁꢀꢅꢄ (10 ꢊꢄꢋ ꢂꢄꢅ lꢄꢆꢇ)
• 300°C
• ꢁuty cycle 70% min, 98% max.
• Logic low 0.8V max
• Logic high 4.5 V min
sꢁꢃꢅꢆgꢄ tꢄmꢂꢄꢅꢆꢁꢀꢅꢄ rꢆꢉgꢄ (cꢆꢊꢄ)
• –55°C to +125°C
• Referenced to input common
• If sync is not used, leave unconnected
iꢉhꢈbꢈꢁ ttL oꢂꢄꢉ cꢃllꢄꢋꢁꢃꢅ
• Logic low (output disabled)
Inhibit pin current 1 mA max
• Referenced to input common
• Logic high (output enabled)
ꢀ ꢀ ꢀ Vꢀ=ꢀ≥ꢀ4.5V
recOmmended Operating cOnditiOns
iꢉꢂꢀꢁ Vꢃlꢁꢆgꢄ rꢆꢉgꢄ
• 19 to 40 VꢁC continuous (see ꢁerating)
cꢆꢊꢄ oꢂꢄꢅꢆꢁꢈꢉg tꢄmꢂꢄꢅꢆꢁꢀꢅꢄ (tꢋ)
• –40°C to +85°C full power
typical characteristics
oꢀꢁꢂꢀꢁ Vꢃlꢁꢆgꢄ tꢄmꢂꢄꢅꢆꢁꢀꢅꢄ cꢃꢄffꢈꢋꢈꢄꢉꢁ
• 150 ppm/°C, typical
iꢉꢂꢀꢁ ꢁꢃ oꢀꢁꢂꢀꢁ cꢆꢂꢆꢋꢈꢁꢆꢉꢋꢄ
• 160 pF, typical
iꢊꢃlꢆꢁꢈꢃꢉ
• 100 megohm minimum at 500 V
cꢃꢉvꢄꢅꢊꢈꢃꢉ Fꢅꢄqꢀꢄꢉꢋy
• Free run mode 245 kHz, typical
iꢉhꢈbꢈꢁ pꢈꢉ Vꢃlꢁꢆgꢄ (ꢀꢉꢈꢁ ꢄꢉꢆblꢄꢇ)
• 4.5 to 5.5 V
derating Output pOwer/current and input vOltage
tꢄmꢂꢄꢅꢆꢁꢀꢅꢄꢊ ꢆꢅꢄ ꢅꢄfꢄꢅꢄꢉꢋꢄꢇ ꢁꢃ ꢁhꢄ ꢁꢄmꢂꢄꢅꢆꢁꢀꢅꢄ ꢆꢁ ꢁhꢄ ꢋꢃꢉvꢄꢅꢁꢄꢅ’ꢊ bꢆꢊꢄ-
ꢂlꢆꢁꢄ
• Linearly derate output power/current from 100% at 85°C to 0% at 125°C.
• Above 105°C linearly derate steady state input voltage to 33 volts at 125°C.
• Indefinite short circuit protection is not guaranteed above 85°C case.
• ꢀperation below an input voltage of 19 volts, including operation in MIL-
STꢁ-704E emergency power conditions, is possible with derated output
power. See Figures 10 and 11.
Electrical Characteristics: 25°C Tc, 28 VꢁC Vin, 100% load, free run, unless otherwise specified.
SINꢂLE ꢀUTPUT MꢀꢁELS
MFW2805S
typ
MFW2812S
MFW2815S
units
paRaMeteR
COnDitiOns
Full lOaD
Min
4.95
—
MaX Min
typ
MaX Min
typ
MaX
Output VOltage
Output CuRRent
Output pOweR
Output Ripple
5.00
5.05 11.88 12.00 12.12 14.85 15.00 15.15
VꢁC
A
Vin = 19 tO 40
tC = -55°C tO +85°C
—
12.00
—
—
—
5.83
70
—
—
—
4.67
70
—
—
60
—
—
W
Full lOaD
bw = ≤ 2 MHz
—
—
—
19
—
—
30
10
10
28
75
30
50
20
20
—
—
—
30
10
10
28
70
30
50
20
25
—
—
—
30
10
10
28
70
30
50
20
25
40
90
35
mV p-p
mV
line RegulatiOn
lOaD RegulatiOn
input VOltage
input CuRRent
Vin = 19 tO 40
nO lOaD tO Full
mV
40 19
40 19
VꢁC
nO lOaD
inhibiteD
90
35
—
—
90
35
—
—
mA
input ReFl. Ripple
Full lOaD
bw = ≤ 2 MHz
—
78
—
10
80
5
25
—
—
81
—
10
83
8
25
—
—
81
—
10
83
8
25
—
mA p-p
%
eFFiCienCy
staRtup Delay
lOw iMpeDanCe
sOuRCe
10
10
10
ms
2
mfw SerieS
70 watt
DC/DC Converters
Electrical Characteristics: 25°C Tc, 28 VꢁC Vin, 100% load, free run, unless otherwise specified.
ꢁUAL ANꢁ TRIPLE ꢀUTPUT MꢀꢁELS
MFW2812ꢁ
MFW2815ꢁ
MFW2812T
typ
MFW2815T
typ
units
VꢁC
A
paRaMeteR
COnDitiOns
Min
typ
MaX Min
typ
MaX Min
4.95
MaX Min
MaX
Output VOltage
Full
lOaD
Main
Dual
Main
Dual
—
—
—
—
—
—
5.05
5.10 4.90
4.95
5.05
±11.88 ±12 ±12.12 ±14.85 ±15 ±15.15 ±11.65±11.80±12.05 ±15.05 ±15.30 ±15.55
Output
V
=
—
—
—
—
—
—
—
—
—
—
—
—
2.92
—
—
5.5
—
—
—
—
—
—
—
—
—
—
—
—
—
2.33
—
—
4.4
—
—
—
—
—
—
—
—
—
—
—
—
4.0
1.67
20
20
—
10.0
4.2
50
—
—
—
—
—
—
—
—
—
—
—
4.0
1.33
20
20
—
10.0
3.33
50
in
1,2
CuRRent
19 tO 40
1,2
Output pOweR
Main
±Dual
tOtal
35
—
66.5
70
35
—
66.5
70
50
50
W
60
60
Full lOaD
bw ≤ 2 MHz
Output Ripple
line RegulatiOn
lOaD RegulatiOn
CROss
Main
Dual
Main
Dual
Main
Dual
—
—
—
—
50
50
2
85
50
50
2
85
mV p-p
mV
30
—
50
30
—
50
85
85
V
=
—
—
20
20
in
19 tO 40
10
—
25
10
—
25
100
5
200
20
100
5
200
20
3
nO lOaD
tO Full
—
—
mV
25
50
25
50
480
600
300
450
Dual
4
RegulatiOn
+pO = 3 w tO 35 w
-pO = 35 w
—
—
1.5
2.0
3.0
4.0
—
—
1.5
2.0
3.0
3.5
—
—
—
—
—
—
—
—
—
—
—
—
%
%
+pO = 20 w tO 50 w
-pO = 50 w tO 20 w
CROss
Main +pO = 33 w
Dual
5
RegulatiOn
+pO = 3 w tO 27 w
-pO = 27 w tO 3 w
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2.3
5.4
6.0
9.0
—
—
2.3
5.0
5.0
7.0
Main +pO = 3 w tO 30 w
Dual
±pO = 15 w
input VOltage
input CuRRent
19
—
—
28
75
30
40 19
28
75
30
40 19
28
60
40 19
28
60
40
110
35
VꢁC
mA
nO lOaD
inhibiteD
90
35
—
—
90
35
—
—
110
—
—
30
35
30
input ReFl. Ripple
Full lOaD
bw ≤ 10 MHz
—
80
—
15
83
15
40
—
—
80
—
15
83
15
40
—
—
80
—
15
84
6
40
—
—
80
—
15
84
6
40
—
mA p-p
%
eFFiCienCy
staRtup Delay
25
25
10
10
ms
Notes
1.ꢀn dual output models the maximum combined output power is 70 watts. 4.Regulation effect on the negative dual output during the defined condi-
A maximum of 95% (66.5 W) is available from any single output. tions.
2.ꢀn triple output models the maximum combined output power is 60 watts. 5.Regulation effect on both dual outputs during the defined conditions.
A maximum of 50 watts is available from a single output.
3.Balanced loads
3
mfw SerieS
70 watt
DC/DC Converters
tHerꢌaL ꢌanaꢍeꢌent
CalCulating MaXiMuM aMbient teMpeRatuRe
The MFW Series of ꢁC/ꢁC converters has an upper operating
temperature of + 85°C at the baseplate of the case. The degree of
heat sinking required to remain within this limit may be determined
from Figure 1 which shows the maximum allowed internal power dissi-
pation (PꢁISS vs. ambient temperature for various heat sink thermal
resistances. PꢁISS may be calculated as:
From Figure 1 we can see that the maximum allowed ambient temper-
ature is approximately 75°C.
heat sink ReCOMMenDatiOns
An MFW Series converter in still air (other than convective currents)
and with no conductive cooling paths other than through electrical
connections at the pins will exhibit a thermal resistance of approxi-
mately 4°C / watt. In cases where this value proves to be too high it is
recommended that additional heat sinking be supplied. The simplest
method of accomplishing this is to firmly attach the converter to a PCB
thereby providing a conductive thermal path. Secondly it is recom-
mended that airflow be provided over the converter. Although each
situation requires a thorough thermal analysis these two measures
can reduce the thermal resistance to as low as 2°C / watt. If calcula-
tions indicate further heat sinking is required it is recommended that
additional thermal mass be provided either under the base plate or on
top of the converter’s mounting flanges or both.
PꢁISS = PꢀUT / efficiency – PꢀUT
The efficiency for all combinations of PꢀUT and VIN for the various
models may be obtained from the graphs on the preceding pages.
Example:Converter = MFW2815ꢁ, TAMB = 70°C,
VIN = 28 VꢁC, PꢀUT = 45 watts
Efficiency = 85% (From Figure 7)
PꢁISS = (45 / 85) – 45 = 7.95 watts
From Figure 1 we can see that this situation will require thermal resis-
tance of approximately 4.5°C / watt.
Conversely we may also find the maximum ambient temperature
which can be tolerated if we know the heat sink thermal resistance.
Example:Converter = MFW2805S, VIN = 28 VꢁC, PꢀUT = 45 W.
Thermal Resistance = 3°C / watt.
Efficiency = 83.5% (From Figure 3)
PꢁISS = (45 / 0.835) – 45 = 8.89 watts.
pin Out
20
pꢀꢁ sꢀꢁꢂꢃꢄ Oꢅꢆꢇꢅꢆ
dꢅꢈꢃ Oꢅꢆꢇꢅꢆ
tꢉꢀꢇꢃꢄ Oꢅꢆꢇꢅꢆ
1
2
3
4
5
6
Positive Input
Case ꢂround
Input Common
Inhibit/Sync In
Negative Sense
Positive Sense
Positive Input
Case ꢂround
Input Common
Inhibit/Sync In
Negative ꢀutput
Positive ꢀutput
ꢀutput Common
No Connection
Positive Input
Case ꢂround
15
10
5
Input Common
Inhibit/Sync In
Neg. Aux. ꢀutput
Positive Aux. ꢀutput
ꢀutput Common
Main (+5) ꢀutput
7, 8 ꢀutput Common
9, 10 Positive ꢀutput
Squared corner indicates pin one.
20° 40° 60° 80° 100° 120° 140°
Degrees Centigrade
Internal Power Dissipation (max)
vs. Ambient Temperature
1
2
3
4
FIGuRE 1
BOTTOM VIEW
MFW
See case L for dimensions.
9
7
8
5
10
6
FIGuRE 2: PIN OuT
4
mfw SerieS
70 watt
DC/DC Converters
Typical Performance Curves: 25°C Tc , 28 VꢁC Vin, 100% load, free run, unless otherwise specified.
86
85
84
83
82
81
80
79
78
89
88
87
86
85
84
83
82
81
89
88
87
86
85
84
83
82
81
20 V
19 V
19 V
28 V
28 V
28 V
40 V
70
40 V
70
40 V
70
10
20
30
40
50
60
10
20
30
40
50
60
10
20
30
40
50
60
Output Power (Watts)
Output Power (Watts)
Output Power (Watts)
MFW2815S Efficiency vs Line & Load
MFW2805S Efficiency vs Line & Load
MFW2812S Efficiency vs Line & Load
FiguRe 3
FiguRe 4
FiguRe 5
87
87
87
19 V
19 V
19 V
85
83
81
85
83
81
79
85
83
81
79
79
28 V
28 V
28 V
77
75
77
77
75
75
40 V
40 V
73
73
73
40 V
71
71
71
10
20
30
40
50
60
70
10
20
30
40
50
60
70
10
20
30
40
50
60
70
Output Power (Watts)
Output Power (Watts)
Output Power (Watts)
MFW2812D Efficiency vs Line & Load
MFW2815D Efficiency vs Line & Load
MFW28512T Efficiency vs Line & Load
FiguRe 6
FiguRe 7
FiguRe 8
19
87
MFW2815D
19 V
18
2815S
85
83
81
MFW2812D
18
283R5S
17
17
28 V
79
2812S
16
77
75
MFW28512T
MFW28515T
16
2805S
15
40 V
73
15
71
10
20
30
40
50
60
70
10
20
30
40
50
60
70
10
20
30
40
50
60
70
Output Power (Watts)
Output Power (Watts)
Output Power (Watts)
Low Line Dropout vs. Load (50 mV drop)
MFW Dual and Triple Output Models
Low Line Dropout vs. Load (50 mV drop)
MFW Single Output Models
MFW28515T Efficiency vs Line & Load
FiguRe 11
FiguRe 10
FiguRe 9
mOdel numbering key
MFW 28 512 T / ES
Base Model
Input Voltage
Output Voltage
(Main and Aux. Vout for triple models)
Number of Outputs
(S = single, D = dual, T = triple)
Screening
(Standard screening has no designator
in this position.)
5
mfw SerieS
70 watt
DC/DC Converters
CASE L
Squared corner indicates pin one
Solder Seal
3.20 max (81.3)
2.850 (72.39)
0.141
dia. x 6
(3.58)
1
2
3
4
.0.040 +0.005/-0.002
(1.02 +0.13/-0.05)
BOTTOM VIEW
1.600 (40.64)
9
7
8
5
Solder Tip-off
0.550 (13.97)
0.350 (8.89)
10
6
0.000
Case dimensions in inches (mm)
Tolerance 0.005 (0.13) for tꢀree decimal places
0.01 (0.3) for tꢁo decimal places
unless otꢀerꢁise specified
CAUTION
Heat from refloꢁ or ꢁave soldering may damage tꢀe device.
Solder pins individually ꢁitꢀ ꢀeat application not exceeding 300°C for 10 seconds per pin
Materials
Header Cold Rolled Steel/Nickel/Tin
Cover Cold Rolled Steel/Nickel/Tin
Pins
#52 alloy pins 1-4, and 9-10
#52 alloy ꢁitꢀ copper core pins 5-8, ceramic seal
Case L, Rev C, 20060803
Please refer to tꢀe numerical dimensions for accuracy. All information is believed to be accurate,
but no responsibility is assumed for errors or omissions. Interpoint reserves tꢀe rigꢀt to make
cꢀanges in products or specifications ꢁitꢀout notice.
Copyrigꢀt © 1999-2006 Interpoint Corp. All rigꢀts reserved.
FiguRe 12: Case l
6
mfw SerieS
70 watt
DC/DC Converters
85°C non-QMl proDuCts—
envIronMental sCreenIng (stanDarD & es)
test
85°c
85°c
/es
standard
1
1
ꢉꢃꢉ QꢌL
ꢉꢃꢉ QꢌL
Pre-cap Inspection
Method 2017
yes
no
yes
yes
yes
yes
yes
Temperature Cycle (10 times)
Method 1010, Cond. B, -55°C to 125°C ambient
Constant Acceleration
Method 2001, 500 g
no
Burn-In
2
96 hours, typical case temperature 85°C case
no
Final Electrical Test MIL-PRF-38534, ꢂroup A
Subgroups 1 and 4: +25°C case
Hermeticity Test
yes
Fine Leak, Method 1014, Cond. A
ꢂross Leak, Method 1014, Cond. C
no
no
yes
yes
no
-3
ꢂross Leak, ꢁip (1 x 10 )
yes
Final Visual Inspection
Method 2009
yes
yes
Test methods are referenced to MIL-STꢁ-883 as determined by MIL-PRF-38534.
Notes:
1. Non-QML products do not meet all of the requirements of MIL-PRF-38534
2. Burn-in is still air with an ambient temperature designed to bring the case temperature to
85°C
20621-001-ꢁTS Rev B
ꢁQ# 1016
All technical information is believed to be accurate, but no responsibility is assumed for errors or omissions. Interpoint
reserves the right to make changes in products or specifications without notice. MFW Series is a trademark of Interpoint.
Copyright © 1991 - 2006 Interpoint. All rights reserved.
7
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