MHD2805DF/ES datasheet, PDF - EEWORLD Datasheet

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MHD2805DF/ES: DescriptionDC-DC Regulated Power Supply Module, 2 Output, 15W, Hybrid, HERMETIC SEALED PACKAGE-10; CategoryPower/power management The power supply circuit; File Size163KB，11 Pages; ManufacturerCrane Co.

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MHD2805DF/ES Overview

DC-DC Regulated Power Supply Module, 2 Output, 15W, Hybrid, HERMETIC SEALED PACKAGE-10

MHD2805DF/ES Parametric

Parameter Name	Attribute value
Objectid	1409910564
package instruction	DIP, DIP10,.8,400TB
Reach Compliance Code	unknown
ECCN code	EAR99
Other features	ADDITIONAL -5V OUTPUT AVAILABLE
Analog Integrated Circuits - Other Types	DC-DC REGULATED POWER SUPPLY MODULE
Efficiency (main output)	78%
Maximum input voltage	40 V
Minimum input voltage	16 V
Nominal input voltage	28 V
JESD-30 code	R-MDMA-P10
JESD-609 code	e3
Maximum grid adjustment rate	0.208%
Maximum load regulation	1%
Number of functions	1
Output times	2
Number of terminals	10
Maximum operating temperature	125 °C
Minimum operating temperature	-55 °C
Maximum output current	3 A
Maximum output voltage	5.05 V
Minimum output voltage	4.95 V
Nominal output voltage	5 V
Package body material	METAL
encapsulated code	DIP
Encapsulate equivalent code	DIP10,.8,400TB
Package shape	RECTANGULAR
Package form	FLANGE MOUNT
Protect	CURRENT
Certification status	Not Qualified
Filter level	MIL-PRF-38534
surface mount	NO
technology	HYBRID
Temperature level	MILITARY
Terminal surface	TIN
Terminal form	PIN/PEG
Terminal pitch	10.16 mm
Terminal location	DUAL
Maximum total power output	15 W
Fine-tuning/adjustable output	NO

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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

•

DC/DC C

ONVERTERS

28 V

OLT

NPUT

MHD SERIES

20 WATT

MODELS

VDC O

UTPUT

SINGLE

DUAL

±5

±12

±15

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.

Weight:

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.

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).

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.

ONVERTER

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-704A series filters) which

will result in compliance. Contact your Interpoint representative for

further details.

IDE

OLTAGE

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.

MPROVED

YNAMIC

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%.

NHIBIT

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.

B2-47

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