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參數資料
| 型號： | MFW28512T |
| 廠商： | CRANE ELECTRONICS INC |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | DC/DC CONVERTERS 28 VOLT INPUT |
| 中文描述： | 3-OUTPUT 60 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | HERMETIC SEALED PACKAGE-10 |
| 文件頁數： | 1/9頁 |
| 文件大小： | 109K |
| 代理商： | MFW28512T |
B4-3
MFW SERIES
70 WATTS
MODELS
VDC O
UTPUT
DUAL
±12
±15
SINGLE
5
12
15
TRIPLE
+5 & ±12
+5 & ±15
DC/DC C
ONVERTERS
28 V
OLT
I
NPUT
Size (max.): 3.20 x 2.46 x 0.595 inches (81.3 x 62.5 x 15.11 mm)
See Section B8, case L, for dimensions.
Weight:
140 grams typical
Screening: Standard or ES.See Section C2 for screening
options, see Section A5 for ordering information.
DESCRIPTION
The MFW Series of DC/DC 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.
D
ESIGN
M
ETHODOLOGY
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. Output regulation is accom-
plished 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.
L
OW
N
OISE
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-
STD-461C (CE03) is possible with the addition of the FMB-461 filter.
Output ripple is maintained at less than 50 mV p-p for single and
dual output models and 85 mV for triple output models.
W
IDE
V
OLTAGE
R
ANGE
All models of the MFW Series are designed to provide full power
operation over an input voltage range of 19 to 40 VDC. Operation
below an input of 19 volts, including operation in MIL-STD-704E
emergency 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.
W
IDE
T
EMPERATURE
R
ANGE
Full load operation of any of the MFW Series converters is available
at case temperatures of –55°C to + 85°C. Operation 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 base-
plate. Please refer to the heat sink requirements section for more
information.
I
NHIBIT
/S
YNC
F
EATURE
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.
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.
F
EATURES
–55°C to + 85°C operation
19 to 40 VDC input
Fully Isolated
Optocoupler feedback
Fixed frequency, 245 kHz typical
Topology – Push-Pull Forward
50 V for up to 50 ms transient protection
Inhibit/sync function
Indefinite short circuit protection
Remote sense on single models
Up to 84% efficiency
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MFW28512T/ES | 制造商:INTERPOINT 制造商全稱:INTERPOINT 功能描述:DC/DC CONVERTERS 28 VOLT INPUT |
| MFW28512TES | 制造商:CRANE 制造商全稱:CRANE 功能描述:DC/DC CONVERTERS 28 VOLT INPUT |
| MFW28515T | 制造商:INTERPOINT 制造商全稱:INTERPOINT 功能描述:DC/DC CONVERTERS 28 VOLT INPUT |
| MFW28515T/ES | 制造商:INTERPOINT 制造商全稱:INTERPOINT 功能描述:DC/DC CONVERTERS 28 VOLT INPUT |
| MFW3701S06 | 功能描述:低信號繼電器 - PCB MFW 1/6 SIZE RELA RoHS:否 制造商:NEC 觸點形式:2 Form C (DPDT-BM) 觸點電流額定值: 線圈電壓:5 V 最大開關電流:1 A 線圈電流:1 A 線圈類型:Non-Latching 功耗:140 mW 端接類型:SMT 絕緣: 介入損耗: |
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