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.

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

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.

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.

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.

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.

The SLH Series converters are packaged in hermetically sealed

metal cases which provide EMI/RFI shielding.

Features

• Radiation tolerant space dc-dc converter

Single event effects (SEE) LET performance to

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

Crane Aerospace & Electronics Power Solutions

SLH Single and Dual DC-DC Converters

Crane Aerospace & Electronics

Power Solutions – Interpoint Products

10301 Willows Rd. NE, Redmond, WA 98052

+1 425-882-3100 • power@crane-eg.com

www.craneae.com/interpoint

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28 Volt input – 1.5 Watt

SLH Rev AB - 2015.10.22