F
EATURES
Fully qualified to Class H or K
Radiation hardened
-55°C to +125°C operation
16 to 40 VDC input voltage range
Fully isolated
Magnetic feedback
Variable operating frequency
Topology –
Self Oscillating Flyback
• Inhibit function
• Indefinite short circuit protection
•
•
•
•
•
•
•
•
DC/DC C
ONVERTERS
28 V
OLT
I
NPUT
SLH SERIES
1.5 WATT
MODELS
VDC O
UTPUT
SINGLE
3.3
5
12
15
DUAL
±5
±12
±15
Size (max.): 0.975 x 0.800 x 0.270 inches (24.77 x 20.32 x 6.86 mm)
See Section B8, case A2, for dimensions.
Weight:
12 grams max.
Screening: Standard, Class H, or Class K (MIL-PRF-38534)
Radiation hardness levels O, L, and R
See Section C2 for screening and radiation hardness
options, see Section A5 for ordering information.
DESCRIPTION
With a miniature footprint of just 0.8 square inches, the 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, mili-
tary, or aerospace bus power and tightly regulates output voltages
to protect downstream components. Single output models feature
outputs of 3.3, 5, 12, or 15 volts, and dual output models feature
outputs of ±5, ±12 and ±15 volts.
connecting the load between positive and negative outputs, leaving
the common unconnected resulting in double the output voltage.
(ex: SLH2805D can be used as a 10 VDC output.)
When used with Interpoint’s STF filter, the combination will meet the
requirements of MIL-STD-461C, CE03.
I
NHIBIT
F
UNCTION
When an open collector TTL logic low is applied to the inhibit
terminal, pin 7, the converter shuts down and lowers the output
voltage to near zero and input current to as low 5 mA. Leaving the
terminal open or applying an open collector TTL logic high will
enable the converter.
S
CREENING AND
R
EPORTS
SLH converters offer three screening options – Standard, Class H,
or Class K – and three levels of radiation hardness. See Section C2,
Quality Assurance, pages C2-7 through C2-9, for descriptions.
Detailed reports on product performance are also available and are
listed on page C2-9.
P
ROTECTION
F
EATURES
All models include a soft-start function to prevent large current draw
and minimize overshoot. The converters provide short circuit protec-
tion (by restricting the current) and output overload protection.
C
ONVERTER
D
ESIGN
SLH Series DC/DC converters incorporate a flyback topology with a
variable frequency of approximately 370 kHz. Feedback provides
output voltage regulation. Output voltage is magnetically fed back to
the input side of the PWM to regulate output voltage. Regulation is
also affected by the load.
Dual models regulate the negative output with magnetic coupling to
the positive output. Up to 80% of the load 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
C
ONVENIENT
P
ACKAGING
The SLH Series converters are packaged in hermetically sealed
metal cases which provide EMI/RFI shielding.
For more information, contact your Interpoint representative
listed in Section A5.
All technical information is believed to be accurate, but no responsibility is
assumed for errors or omissions. Interpoint reserves the right to make changes in
products or specifications without notice. SLH Series is a trademark of Interpoint.
Copyright © 1999 Interpoint. All rights reserved.
B1-10
CASE A
Dot on top of case
indicates pin one.
C
ASES
BOTTOM VIEW CASE A1
FMSA EMI Filter: Screening – Standard, ES, or 883
STF EMI Filter: Screening – Space Standard, H, or K
Seam Seal
Projection Weld
0.697
(17.70
0.397
(10.08)
CASE A
BOTTOM VIEW
0.800 max
See Figures 2 - 4
(20.32)
for pin configurations.
Squared corner and dot on
top of case indicate pin one.
1
8
2 3
4
0.975 max
(24.77)
Materials
Header
Kovar/Nickel/Gold
(Case A3, Kovar/Nickel)
Cover
Kovar/Nickel
Pins
Kovar/Nickel/Gold,
matched glass seal
Case dimensions in inches (mm)
Tolerance
±0.005
(0.13) for three decimal places
±0.01
(0.3) for two decimal places
unless otherwise specified
CAUTION
Heat from reflow or wave soldering may damage
the device. Solder pins individually with heat
application not exceeding 300°C for 10 seconds
per pin.
0.270 max
(6.98)
0.000
0.27
±0.02
(6.9
±0.5)
0.097
(2.46)
0.000
0.270 max
(6.86)
0.27
±0.02
(6.9
±0.5)
0.000
0.000
7
6 5
0.135 (3.43)
F
IGURE
2: C
ASE
A1
0.018
±
0.002 dia.
(0.46
±
0.05)
BOTTOM VIEW CASE A2
MCH Series: Screening – Standard, ES, or 883
SLH Series: Screening – Space Standard, H, or K
Seam Seal
Projection Weld
0.697
(17.70
0.018
±
0.002 dia.
(0.46
±
0.05)
0.097
(2.46)
0.000
0.27
±0.02
(6.9
±0.5)
0.270 max
(6.98)
0.000
0.000
0.270 max
(6.86)
0.000
0.27
±0.02
(6.9
±0.5)
7
6
5
Squared corner and dot on
top of case indicate pin one.
1 2
3
4
F
IGURE
1: C
ASE
A M
AXIMUM
D
IMENSIONS
0.135 (3.43)
0.235 (5.97)
F
IGURE
3: C
ASE
A2
BOTTOM VIEW CASE A3
DCH Series: Screening – Standard or ES
Seam Seal
Projection Weld
0.697
(17.70
0.018
±
0.002 dia.
(0.46
±
0.05)
0.097
(2.46)
0.000
0.000
0.000
0.350 max
(8.89)
0.27
±0.02
(6.9
±0.5)
0.350 max
(8.89)
0.000
0.27
±0.02
(6.9
±0.5)
16 15 14
9
Dot on top of case
indicates pin one.
1 2 3
8
0.435 (11.05)
0.535 (13.59)
Note: Although every effort has been made to render the case
drawings at actual size, variations in the printing process may
cause some distortion. Please refer to the numerical dimensions
for accuracy.
F
IGURE
4: C
ASE
A3
B8-6
0.835 (21.21)
0.135 (3.43)
0.235 (5.97)
0.335 (8.51)
0.835 (21.21)
0.735 (18.67)
0.835 (21.21)
QA SCREENING
SPACE PRODUCTS
R
ADIATION
H
ARDNESS
L
EVELS
FOR
DC/DC C
ONVERTERS AND
L
INE
I
NPUT
M
ODULES1
PRODUCT LEVEL AVAILABILITY
RADIATION HARDNESS LEVELS
O:
Standard, no radiation guarantee
For system evaluation, electrically
and mechanically comparable to
H and K level.
L:
Radiation hardened – Tested lots
Up to 50 k Rads (Si) total dose
No SEU guarantee
R:
Radiation hardened – Tested lots
Up to 100 k Rads (Si) total dose
SEU guarantee up to 40 MeV
L and R are referenced to
Assurance (RHA) levels.
ENVIRONMENTAL SCREENING LEVELS
STANDARD
CLASS
CLASS
(O)
H
K
OO
HO
Not
available
Not
available
Not
available
HL
KL
HR
KR
MIL-PRF-38534, appendix G, Radiation Hardness
Note
1. Interpoint’s
EMI filters
are designed exclusively with passive components providing
maximum tolerance for space environment requirements.
Applies to the following products:
SMFLHP Series (levels O and L only)
SMFL Series (levels O and L only)
SMTR Series
SSP Series
SMHF Series
SMSA Series
SLH Series
SLIM Series Modules
R
EPORTS
: I
NCLUDED WITH PURCHASE OF PRODUCT
HL, KL, HR, or KR
1.Radiation Susceptibility Analysis
2.Electrical/Thermal Stress Analysis and Derating Report
3.MTBF Report
4.FMEA Report
OO
option: Select reports available as separate purchases.
C2-9
京公网安备 11010802033920号
EEWORLD
