- 您現在的位置：買賣IC網 > PDF目錄374436 > MHD2805S (CRANE ELECTRONICS INC) DC/DC CONVERTERS 28 VOLT INPUT PDF資料下載
參數資料
| 型號： | MHD2805S |
| 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： | 1-OUTPUT 15 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | HERMETIC SEALED PACKAGE-10 |
| 文件頁數： | 1/11頁 |
| 文件大?。?/td> | 129K |
| 代理商： | MHD2805S |
MODELS
VDC O
UTPUT
B2-47
SINGLE
5
12
15
18
DUAL
±5
±12
±15
DESCRIPTION
The MHD Series of DC/DC converters offers up to 20 watts of
output power over the full military temperature range with up to 84%
efficiency. Thick-film hybrid techniques provide military/aerospace
reliability levels and optimum miniaturization. The MHD Series
power density rating is up to 21 watts/in
.
MHD converters are packaged in hermetically sealed metal cases,
making them ideal for use in military, aerospace and other high reli-
ability applications. Units are available with standard screening,
“ES” screening, or fully compliant SMD versions (see Section C2 for
screening conditions).
C
ONVERTER
D
ESIGN
The MHD converters are constant frequency, pulse-width mod-
ulated switching regulators which use a quasi-square wave, single
ended, forward converter design. Tight load regulation (5 mV
typical) is maintained via wide bandwidth magnetic feedback and,
on single output models, through use of remote sense. On dual
output models, the positive output is independently regulated and
the negative output is cross regulated through the use of tightly
coupled magnetics and shunt regulators.
Indefinite short circuit protection and overload protection are
provided by a constant current-limit feature. This protective system
senses current in the converter’s secondary stage and limits it to
approximately 115% of the maximum rated output current.
MHD converters are provided with internal filtering capacitors that
help reduce the need for external components in normal operation.
For systems that require compliance with MIL-STD-461C’s CE03
standard, Interpoint offers filter/transient suppression modules
(including the FMC-461, FMD-461 and FM-704Aseries filters) which
will result in compliance. Contact your Interpoint representative for
further details.
S
YNCHRONIZATION
The MHD offers a synchronization feature that allows the designer
to match the switching frequency of the converter to the frequency
of the system clock. In free-run (unsynchronized) mode, the MHD
unit switches at 625 kHz (nominal). In sync mode, the converter will
run at any frequency between 500 kHz and 675 kHz. The sync
control operates with a quasi-TTL signal at any duty cycle between
40% and 60%.
Synchronizing the converter with the system clock allows the
designer to confine switching noise to clock transitions, minimizing
interference and reducing the need for filtering. The sync pin should
be connected to input common pin when not in use.
W
IDE
V
OLTAGE
R
ANGE
The MHD converters are designed to provide full power operation
over a full 16 to 40 VDC voltage range. Operation below 16 volts,
including MIL-STD-704E emergency power conditions is possible
with derated power. Refer to the low line dropout graph (Figure 15)
for details.
I
MPROVED
D
YNAMIC
R
ESPONSE
The MHD feed-forward compensation system provides excellent
dynamic response and noise rejection. Audio rejection is typically 50
dB. The min. to maximum step line transient response is typically
less than 4%.
I
NHIBIT
F
UNCTION
MHD 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 a TTL
compatible low (
≤
0.8 V) is applied to the inhibit pin. The unit is
enabled when the pin, which is internally connected to a pull-up
resistor, is left unconnected or is connected to an open-collector
gate. The open circuit output voltage associated with the inhibit pin
is 9 to 11 V. In the inhibit mode, a maximum of 8 mA must be sunk
from the inhibit pin.
DC/DC C
ONVERTERS
28 V
OLT
I
NPUT
MHD SERIES
20 WATT
F
EATURES
–55° to +125°C operation
16 to 40 VDC input
Fully Isolated
Magnetic feedback
Fixed frequency
Topology – Single Ended Forward
50 V for up to 50 ms
transient protection
Inhibit and synchronization functions
Indefinite short circuit protection
Up to 84% efficiency, 21 watts/in
3
Size (max.): Non-flanged, case H2
2.125 x 1.125 x 0.400 inches (53.98 x 28.58 x 10.16 mm)
Flanged case, K3
2.910 x 1.125 x 0.400 inches (73.91 x 28.58 x 10.16 mm)
See Section B8, cases H2 and K3 for dimensions.
52 grams max., flanged 55 grams max.
Screening: Standard, ES, or 883 (Class H). See Section C2 for screening
options, see Section A5 for ordering information.
Weight:
相關PDF資料 |
PDF描述 |
|---|---|
| MHE1205S | DC/DC CONVERTERS 12 AND 28 VOLT INPUT |
| MHF283R3S | DC/DC CONVERTERS 28 VOLT INPUT |
| MHL0512D | DC/DC CONVERTERS 5 VOLT INPUT |
| MHP27005S | DC/DC CONVERTERS 270 VOLT INPUT |
| MHV12-2.0K1000N | HV-Power Supplies |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MHD2805S/883 | 制造商:CRANE 制造商全稱:CRANE 功能描述:DC/DC CONVERTERS 28 VOLT INPUT |
| MHD2805SF | 制造商:CRANE 制造商全稱:CRANE 功能描述:DC/DC CONVERTERS 28 VOLT INPUT |
| MHD2805SF/883 | 制造商:INTERPOINT 制造商全稱:INTERPOINT 功能描述:DC/DC CONVERTERS 28 VOLT INPUT |
| MHD2812D | 制造商:CRANE 制造商全稱:CRANE 功能描述:DC/DC CONVERTERS 28 VOLT INPUT |
| MHD2812D/883 | 制造商:CRANE 制造商全稱:CRANE 功能描述:DC/DC CONVERTERS 28 VOLT INPUT |
發布緊急采購，3分鐘左右您將得到回復。