Crane Aerospace & Electronics Power Solutions
SLH Single and Dual DC-DC Converters
28 Volt input – 1.5 Watt
Features
smꢀll ꢁꢂzꢃ, 0.79 ꢂꢄ2 (5.1 ꢅm2)
• Operating temperature -55° to +125°C
• Qualified to MIL-PRF-38534 Class H and K
• Radiation hardness assurance (RHA) to level R 100 krad(Si)
• Input voltage range 16 to 40 VDC
• Fully isolated, magnetic feedback
• Inhibit function
• Indefinite short circuit protection
• High power density, up to 88% efficiency
• Radiation tolerant to
MODELS
High dose rate (HDR)
VDC OUTPUT
- 100 krad(Si) total ionizing dose (TID),
30-300 rad(Si)/sec dose rate
- SEE - LET to 86.3 MeV cm2/mg
SIꢀꢁLES
DUALS
±5
5
12
15
±12
±15
description
Up to 80% of the load of the dual output models may be on one
output providing that the other output carries a minimum of 20%
of the total load. The dual models can be used as a single output
voltage by connecting the load between positive and negative
outputs, leaving the common unconnected resulting in double the
output voltage. (for example, SLH2805D can be used as a 10
VDC output.)
With a miniature footprint of just 0.79 square inches, the
Interpoint™ SLH Series™ of 28 V dc-dc converters delivers 1.5
watts of output power while saving significant board area. The
wide input voltage range of 16 to 40 VDC accepts the varying
voltages of space, military, or aerospace bus power and tightly
regulates output voltages to protect downstream components.
Single output models feature outputs of 5, 12, or 15 volts, and
dual output models feature outputs of ±5, ±12 and ±15 volts.
When used with Interpoint’s STF28-461 filter, the combination will
meet the requirements of MIL-STD-461C, CE03.
Screening
SLH converters offer the following screening options: Space
Prototype (O), Class H, or Class K. Radiation tolerant to
Radiation Hardness Assurance (RHA) levels of “-” (O) or “R”,
per MIL-STD-38534. Interpoint model numbers use an “O” in
the RHA designator position to indicate the “-” (dash) Radiation
Hardness Assurance level of MIL-PRF-38534, which is defined
as “no RHA”. See “Table 8: Element Evaluation” on page 11
and “Table 9: Environmental Screening and RHA Levels” on page
12 for more information.
inhibit Function
The SLH Series incorporates an inhibit terminal that can be used
to disable internal switching. The converter is inhibited when an
active low (≤ 0.5 V) signal is applied to the inhibit pin (pin 7). In
the inhibit mode the inhibit pin sources up to 2 mA maximum.
The converter resumes normal operation when an open circuit is
applied to the inhibit pin. The open circuit voltage of the inhibit is
7 to 8 volts. Do not apply an external pull-up to the converter.
converter DeSign
Protection FeatureS
SLH Series dc-dc converters incorporate a flyback topology with
a variable switching frequency. Feedback provides output voltage
regulation. Output voltage is magnetically fed back to the input
side of the PWM to regulate output voltage.
All models include a soft-start function to prevent large current
draw and minimize overshoot. The converters provide short
circuit protection (by restricting the current) and output overload
protection.
convenient Packaging
The SLH Series converters are packaged in hermetically sealed
metal cases which provide EMI/RFI shielding.
Crane Aerospace & Electronics
Page 1 of 12
SLH Rev AA - 2013.12.16
Power Solutions – Interpoint Products
10301 Willows Rd. NE, Redmond, WA 98052
+1 425.882.3100 • power@crane-eg.com
www.craneae.com/interpoint
The information in this document is a derivative of a document cleared
by the Department of Defense (DoD) Office of Security Review (OSR) for
public release. OSR case number 14-S-0390 dated December 12, 2013.