S2805S International Rectifier Corp., S2805S Datasheet

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S2805S

Manufacturer Part Number
S2805S
Description
Hybrid - High Reliability Radiation Hardened Low Power Dc/dc Converter
Manufacturer
International Rectifier Corp.
Datasheet
HYBRID - HIGH RELIABILITY
RADIATION HARDENED
LOW POWER
DC/DC CONVERTER
Manufactured in a facility fully qualified to MIL-PRF-
38534, these converters are fabricated utilizing DSCC
qualified processes. For available screening options,
refer to device screening table in the data sheet.
Description
The converters incorporate a fixed frequency single
ended forward topology with magnetic feedback and
an internal EMI filter utilizing large multilayer ceramic
capacitors processed per MIL-PRF-49470 for improved
reliability. All models include an external inhibit port .
They are encased in a hermetic 1.71” x 1.31” x 0.45”
steel package and weigh less than 50 grams. The
package utilizes rugged ceramic feed-through copper
core pins and is hermetically sealed using parallel seam
welding.
Non-flight versions of the S-Series converters are
available for system development purposes. Variations
inelectrical specifications and screening to meet custom
requirements can be accommodated.
The S-Series of DC/DC converters are low power
radiation hardened, high reliability devices designed
for hostile radiation environments such as those
encountered by geostationary earth orbit satellites, deep
space probes and communication systems. Features
include small size, high efficiency, low weight and a
high tolerance to total ionizing dose, single event effects,
and environmental stresses such as temperature
extremes, mechanical shock, and vibration. All
components are fully derated to meet the requirements
of MIL-STD-975 and MIL-STD-1547. Extensive
documentation including Radiation Susceptibility,
Thermal Analysis, Stress Analysis and MTBF are
available.
www.irf.com
n
n
Features
n Total Dose >100K Rad(Si)
n SEE Hardened to LET up to 82 MeV
n Low Weight < 50 grams
n Magnetically Coupled Feedback
n 18V to 40V DC Input Range
n Up to 10W Output Power
n Single and Dual Output Models Include
n High Efficiency - to 82%
n -55°C to +125°C Operating Temperature Range
n 100M
n Under-Voltage Protection
n Short Circuit and Overload Protection
n Output Over Voltage Limiter
n External Inhibit
n Standard Microcircuit Drawings Available
Applications
n
3.3, 5, 7,12,15,
Launch Vehicles
Communication Systems
Geostationary or Low Earth Orbit Satellites
28V Input, Single/Dual Outpu
@ 500VDC Isolation
±
5,
±
12 and
S
S-SERIES
±
15V
PD-94584D
.
cm
2
/mg
1
t

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S2805S Summary of contents

Page 1

HYBRID - HIGH RELIABILITY RADIATION HARDENED LOW POWER DC/DC CONVERTER Description The S-Series of DC/DC converters are low power radiation hardened, high reliability devices designed for hostile radiation environments such as those encountered by geostationary earth orbit satellites, deep space ...

Page 2

S-SERIES Circuit Description The S-Series converters utilize a single-ended forward topology with resonant reset. The nominal switching frequency is 525KHz. Electrical isolation and tight output regulation are achieved through the use of a magnetically coupled feedback. Voltage feed-forward with duty ...

Page 3

... S2807S 2,3 S2812S 2,3 S2815S 2,3 S2805D 2,3 S2812D 2,3 S2815D 2,3 Output power ( P ) OUT All models 1,2,3 Output current ( I ) OUT S2803R3S 1,2,3 S2805S S2807S S2812S S2815S S2805D S2812D S2815D Line regulation ( VR ) 1,2,3 LINE Load regulation ( VR ) 1,2,3 LOAD Cross regulation ( VR ) CROSS S2805D 1,2,3 S2812D S2815D For Notes to Electrical Performance Characteristic Table, refer to page 6 www ...

Page 4

... Enable Input (Inhibit Function) Open circuit voltage 1,2,3 Drive current (sink) Voltage range Current Limit Point Expressed as a percentage 1,2,3 of full rated load current S2803R3S S2805S S2807S S2812S S2815S S2805D S2812D S2815D For Notes to Electrical Performance Characteristic Table, refer to page continued ) Conditions -55° ...

Page 5

... Overshoot (V ) 4,5,6 OS S2803R3S S2805S S2807S S2812S S2815S S2805D S2812D S2815D Turn-on Delay (T ) DLY Capacitive Load (CL) S2803R3S 1 S2805S S2807S S2812S S2815S S2805D S2812D S2815D Line Rejection 1 Isolation 1 Device Weight MTBF For Notes to Electrical Performance Characteristic Table, refer to page 6 www.irf.com ( continued ) Conditions -55°C ≤ T ≤ ...

Page 6

S-SERIES Notes: Electrical Performance Characteristics 1. Parameter is tested as part of design characterization or after design changes. Thereafter, parameter shall be guaranteed to the limits specified. 2. Parameter verified during line and load regulation tests. 3. Output load current ...

Page 7

Figure 1. Block Diagram - Single Output EMI 1 Filter +Input Housekeeping 4 Enable 2 Case Input Return 3 Figure 2. Block Diagram - Dual Output EMI 1 Filter +Input Housekeeping 4 Enable 2 Case Input Return 3 www.irf.com Primary ...

Page 8

S-SERIES Ø 0.140 3 Plcs 0.705 0.200 2.210 Ref 2.265 Max 0.050 Typ Pin # Radiation Performance Characteristics Test Total Ionizing Dose ( Gamma ) Single Event Effects SEU, SEL, SEGR, SEB International ...

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... Cond A, C 2012 Yes 2009 Yes Part Numbering /EM IR Standard Part Number Model S2803R3S Input Voltage S2805S Nominal S2812S 28 = 28V S2815S Output Voltage S2805D 03R3 = 3.3V S2812D 12V, S2815D 15 = 15V Visit us at www.irf.com for sales contact information. ...

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