SLH28 Datasheet, PDF (1/12 Pages) Interpoint Corporation Company – SLH Single and Dual DC-DC Converters

Crane Aerospace & Electronics Power Solutions
SLH Single and Dual DC-DC Converters
28 Volt input – 1.5 Watt
Features
• Radiation tolerant space dc-dc converter
Single event effects (SEE) LET performance to
86 MeV cm²/mg
Total ionizing dose (TID) guaranteed per MIL-STD-883
method 1019, radiation hardness assurance (RHA)
L = 50 krad(Si), R = 100 krad(Si)
• Operating temperature -55°C to +125°C
• Qualified to MIL-PRF-38534 Class H and K
• Input voltage range 16 to 40 V
• Transient protection 50 V for 50 ms
• Fully isolated magnetic feedback
• Fixed high frequency switching
• Inhibit function
• Indefinite short circuit protection
models
Output Voltage (V)
Singles
Duals
5
±5
12
±12
15
±15
description
With a miniature footprint of just 0.79 square inches, the
Interpoint^® SLH Series™ of 28 volt dc-dc converters delivers 1.5
watts of output power while saving significant board area. The
wide input voltage range of 16 to 40 volts 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.
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.
Screening
SLH converters offer screening to Class H or K and radiation
hardness assurance (RHA) levels L - 50 krad(Si) or R - 100
krad(Si). Single event effects (SEE) LET performance to 86 MeV
cm²/mg. See Table 9 on page 12 for more information.
Converter Design
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.
Protection Features
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.
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
volt output.)
When used with Interpoint’s STF28-461 filter, the combination will
meet the requirements of MIL-STD-461C, CE03.
Crane Aerospace & Electronics
Power Solutions – Interpoint Products
10301 Willows Rd. NE, Redmond, WA 98052
[phone] • [e-mail]
www.craneae.com/interpoint
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SLH Rev AB - 2015.10.22