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SMRT283R3S/KR

Description
Analog Circuit,
CategoryAnalog mixed-signal IC    The signal circuit   
File Size214KB,16 Pages
ManufacturerSignal Technology Corp California Operations
Download Datasheet Parametric View All

SMRT283R3S/KR Overview

Analog Circuit,

SMRT283R3S/KR Parametric

Parameter NameAttribute value
MakerSignal Technology Corp California Operations
package instruction,
Reach Compliance Codeunknown
Crane Aerospace & Electronics Power Solutions
SMRT Single, Dual and Triple DC/DC Converters –
PRELIMINARY
28 VOLT INPUT – 35 WATT
FEATURES
–55°C to +125°C operation
19 to 56 VDC input
Dual Magnetic feedback
80 V for 100 ms transient protection
Inhibit function and output trim
Indefinite short circuit protection
Radiation hardened to
1 x 10
12
protons/cm
2
neutron or proton fluence
10
11
rads(Si)/sec dose rate
3 x 10
5
rads(Si) total dose
SEU 80 MeV cm
2
/mg
Meets MIL-STD-704 emergency operation and transient
standards
No minimum load required
5 port isolated design
Isolated synchronization input
MODELS
VDC O
UTPUT
SINGLE
3.3
5
15
DUAL
±5
±12
±15
• Topology – Two-Phased Flyback
TRIPLE
+3.3 & ±12
+5 & ±12
+5 & ±15
DESCRIPTION
The SMRT Series™ of DC/DC converters offers up to 35
watts of power in a radiation hardened design. The low profile
SMRT converters are manufactured in Interpoint’s fully certified
and qualified MIL-STD-1772 production facility and packaged
in hermetically sealed steel cases. They are ideal for use in
programs requiring high reliability, small size, and high levels of
radiation hardening.
The SMRT converters are switching regulators which use a two-
phase, phase shifted flyback design with a nominal switching
frequency of 300 kHz. Close regulation is maintained with
advanced constant frequency pulse width modulation design
techniques. The SMRT’s feed-forward compensation topology
and discontinuous topology provide high levels (80 dB peak) of
input-to-output ripple rejection. A minimum load of 2% of full load
should be used on outputs at TID of 100k rads(Si) or greater to
ensure tight regulation over the full input range.
Two independent feedback loops are used to regulate either a
single main output and dual outputs or a configuration of two
sets of dual outputs with each set independently regulated. Each
set of outputs are electrically isolated from each other and from
the input. This product configuration eliminates cross regulation
effects between output sets. Configurations include:
• Single Output: Two-phased single output
• Dual Output: Dual outputs each with independent regulation and
isolation.
• Triple Output: One main (independent) output and two auxiliary
outputs (±).
U
NDERVOLTAGE
L
OCKOUT
The converters have an undervoltage lockout that will allow
power conversion at 17 volts on a rising input voltage and a
conversion shut-down on a falling voltage at approximately 14.5
volts.
I
NHIBIT
F
UNCTION
The SMRT Series incorporates an inhibit terminal that can be
used to disable internal switching. The converter is inhibited
when a logic low (≤ 0.8 V) signal is applied to the TTL compatible
inhibit pin. In the inhibit mode the inhibit pin current requirement
is less than ~2 mA. The converter resumes normal operation
when a logic high (≥ 2.4 V) signal or open circuit is applied to the
inhibit pin. The open circuit voltage of the inhibit is 5 to 6 volts.
The maximum allowable voltage applied to the inhibit pin is 10
VDC.
S
YNCHRONIZATION
An isolated sync input allows this input to be connected to any of
the devices three returns. It can be referred to the input return or
any of the output returns. Input current into this pin is limited by a
series 1k ohm resistance.
Crane Aerospace & Electronics
Electronics Group (Interpoint Brand)
PO Box 97005 • Redmond WA 98073-9705
425.882.3100 • electronics@craneae.com
www.craneae.com
Page 1 of 14
Rev B PRELIMINARY
20060713
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