DHD2805SK 查看數據表（PDF） - M.S. Kennedy
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DHD2805SK Datasheet PDF : 5 Pages
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ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
4707 Dey Road Liverpool, N.Y. 13088
7.5W
DC-DC
CONVERTER
DHD2805S
(315) 701-6751
HI-REL DESIGN
• WAVE SOLDERABLE PACKAGE
• ALL CERAMIC CAPACITORS
• SURFACE MOUNT MAGNETICS
• WITHSTANDS 5000G
FEATURES — SINGLE OUTPUT
• REPLACES APEX DHW2805S
• NO DERATING — -55°C to +125°C
• WIDE SUPPLY RANGE — 16V to 40V
• HIGH ISOLATION — 500V
• HIGH POWER DENSITY — 17W/IN3
• OUTPUT VOLTAGE ADJUSTMENT —
STANDARD
• REMOTE SHUTDOWN
• OPERATES TO 11VIN AT 5W
• AVAILABLE WITH 5V OUTPUT
TYPICAL APPLICATION WITH OPTIONS
DESCRIPTION
The DHD2805S DC-DC converter provides the rugged-
ness, reliability, and features required to meet the advanced
design challenges of today’s hi-rel market. This is accom-
plished while retaining a power density of 17 W/in3 and 425
mW/gram of power/package performance. The use of ad-
vanced substrate and reflow soldering techniques during
construction results in a rugged, cost-effective, and com-
pletely solderable package.
DHD2805S hybrid converter series utilizes all ceramic
BLOCK DIAGRAM
capacitors and surface mount magnetics to provide reliable
operation at all operating temperatures while surviving very
6
1
high G forces.
DHD2805S standard features include output fault monitor-
ing and/or turn on voltage point programming via the shut-
2
down pin. All three functions may be implemented simulta-
neously with a minimum of external components. An output
voltage adjustment/load compensation pin is also standard.
PWM
5 FEED FORWARD
CONTROLLER
Fault tolerant design protects these converters from most
external circuit faults. The output and output adjust pins will
7
withstand +35 V while the shutdown pin will withstand +50 V
protecting the converters from a variety of system or board
ERROR AMPLIFIER
REFERENCE AND
ISOLATION
faults i.e. solder bridges etc. Unique load fault protection
circuitry allows this converter to pull up loads having difficult
3
static load line characteristics and allows short term load
excursions significantly beyond ratings in most applications.
A transformer isolated forward converter topology operat-
EXTERNAL CONNECTIONS
ing at a switching frequency of 400 KHz allows operation over
a wide input voltage range. Internal filtering of both input and
output eliminates the need for external capacitors in many
applications.
The 8-pin DIP package is hermetically sealed and isolated
from the internal circuits. Heat sinking is recommended for full
1 +OUTPUT
2 -OUTPUT
3 ADJUST/COMP
4 NO CONNECTION
5 SHUTDOWN PLUS
8 CASE
7 -INPUT
6 +INPUT
power operation at elevated ambient temperatures.
1
Rev. - 3/01
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