Crane Aerospace & Electronics Power Solutions
SLH Single and Dual DC-DC Converters
28 Volt input – 1.5 Watt
Features
small size, 0.79 in
2
(5.1 cm
2
)
•
Operating temperature -55° to +125°C
•
Qualified to MIL-PRF-38534 Class H and K
•
Input voltage range 16 to 40 VDC
•
Inhibit function
•
Fully isolated, magnetic feedback
•
Indefinite short circuit protection
•
Radiation hardness assurance (RHA) to level R 100 krad(Si)
•
Radiation tolerant to
•
High power density, up to 88% efficiency
High dose rate (HDR)
MODELS
VDC OUTPUT
- 100 krad(Si) total ionizing dose (TID),
- SEE - LET to 86.3 MeV
30-300 rad(Si)/sec dose rate
cm
2
/mg
SIngLES
5
12
15
DUALS
±5
±12
±15
description
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.
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.)
When used with Interpoint’s STF28-461 filter, the combination will
meet the requirements of MIL-STD-461C, CE03.
S
creening
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.
i
nhibit
F
unction
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.
c
onverter
D
eSign
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.
P
rotection
F
eatureS
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.
c
onvenient
P
ackaging
The SLH Series converters are packaged in hermetically sealed
metal cases which provide EMI/RFI shielding.
Crane Aerospace & Electronics
Page 1 of 12
Power Solutions – Interpoint Products
SLH Rev AA - 2013.12.16
10301 Willows Rd. NE, Redmond, WA 98052
The information in this document is a derivative of a document cleared
+1 425.882.3100 • power@crane-eg.com
by the Department of Defense (DoD) Office of Security Review (OSR) for
www.craneae.com/interpoint
public release. OSR case number 14-S-0390 dated December 12, 2013.
Crane Aerospace & Electronics Power Solutions
SLH Single and Dual DC-DC Converters
28 VoLt input – 1.5 Watt
Model nuMbering Key
Base Model
Input Voltage
SLH
28 12 D / K
R
s
tandard
m
icrOcircuit
d
rawing
(smd)
5962R0052601KXC
5962R0052701KXC
5962R0052801KXC
5962R0250401KXC
5962R9955601KXC
5962R9852901KXC
sMd nuMbers
slh s
imilar
P
art
SLH2805S/KR
SLH2812S/KR
SLH2815S/KR
SLH2805D/KR
SLH2812D/KR
SLH2815D/KR
Output Voltage
Number of Outputs
(S = single, D = dual)
Screening
Radiation Hardness
Assurance (RHA)
F
igure
3: m
oDeL
n
umbering
k
ey
The SMD number shown is for Class K screening and Radiation
Hardness Assurance (RHA) level R. See the SMD for the
numbers for other screening and radiation levels. For exact
specifications for an SMD product, refer to the SMD drawing.
SMDs can be downloaded from
www.landandmaritime.dla.mil/programs/smcr
t
abLe
3: SmD n
umber
c
roSS
r
eFerence
O
n
the lines belOw
,
enter One selectiOn frOm each categOry tO determine the mOdel number
.
Model nuMber options
category
options
Fill in For Model #
base Model and
input Voltage
output Voltage
5, 12, 15
number of
outputs
1
S
D
screening
2
O
H
K
rHa
3
O
R
SLH28
5, 12, 15
__
SLH28
__________
/
_______
notes:
1. number of Outputs: S is a single output and D is a dual output.
2. Screening: A screening level of O is a Space Prototype and is only used with RHA O. See “Table 8: Element Evaluation” on page 11 and “Table 9: Environmental
Screening and RHA Levels” on page 12 for more information.
3. RHA: 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.” RHA O is only available with Screening level O. See “Table 9: Environmental Screening and RHA Levels” on page 12 for more information.
t
abLe
4: SmD n
umber
c
roSS
r
eFerence
www.craneae.com/interpoint
SLH Rev AA - 2013.12.16
Page 3 of 12
Crane Aerospace & Electronics Power Solutions
SLH Single and Dual DC-DC Converters
28 VoLt input – 1.5 Watt
t
abLe
5: o
Perating
c
onDitionS
- a
LL
m
oDeLS
, 25°c
caSe
,
28 vDc v
in
,
unLeSS otherwiSe SPeciFieD
ALL MODELS
PARAMETER
LEAD SOLDERIng TEMPERATURE
1
STORAgE TEMPERATURE
CASE OPERATIng
TEMPERATURE
DERATIng OUTPUT POWER/CURREnT
1
ISOLATIOn, AnY PIn TO CASE
EXCEPT CASE PIn
InPUT TO OUTPUT CAPACITAnCE
1
COnVERSIOn FREQUEnCY
-55° TO +125°C
InHIBIT ACTIVE LOW (OUTPUT DISABLED)
Do not apply a voltage to the inhibit pin
2
5, 12, 15, ±5 AnD ±15
±12
InHIBIT PIn PULLED
LOW
InHIBIT PIn SOURCE
CURREnT
1
REFEREnCED TO
InHIBIT ACTIVE HIgH (OUTPUT EnABLED)
Do not apply a voltage to the inhibit pin
2
InHIBIT PIn COnDITIOn
OPEn InHIBIT PIn
VOLTAgE
1
FULL POWER
ABSOLUTE
1
LInEARLY
@ 500 VDC AT 25°C
COnDITIOnS
10 seconds max.
MIn
—
-65
-55
-55
TYP
—
—
—
—
MAX
300
+150
+125
+135
UnITS
°C
°C
°C
From 100% at 125°C to 0% at 135°C
100
—
220
220
—
—
—
100 - 170
280
—
—
—
—
—
320
420
0.5
2
Megohms
pF
kHz
V
mA
InPUT COMMOn
OPEn COLLECTOR OR UnCOnnECTED
7
—
8
V
notes:
1. guaranteed by qualification test and/or analysis. not an in-line test.
2. An external inhibit interface should be used to pull the inhibit low or leave it floating. The inhibit pin can be left unconnected if not used. Do not
apply an external pull-up.
www.craneae.com/interpoint
SLH Rev AA - 2013.12.16
Page 4 of 12
Crane Aerospace & Electronics Power Solutions
SLH Single and Dual DC-DC Converters
28 VoLt input – 1.5 Watt
t
abLe
6: e
LectricaL
c
haracteriSticS
: -55°
SIngLE OUTPUT MODELS
PARAMETER
OUTPUT VOLTAgE
2
OUTPUT CURREnT
OUTPUT POWER
OUTPUT RIPPLE
10 kHz - 2 MHz
LInE REgULATIOn
LOAD REgULATIOn
3
InPUT VOLTAgE
V
In
= 16 to 40 VDC
V
In
= 16 to 40 VDC
COnDITIOnS
MIn
4.80
—
—
—
—
—
—
16
—
—
—
—
72
69
—
—
—
—
—
—
—
—
—
to
+125°c
caSe
,
28 vDc v
in
, 100%
LoaD
,
unLeSS otherwiSe SPeciFieD
SLH2805S
TYP
5.00
—
—
65
—
115
440
28
—
2.9
1.3
85
79
—
0.4
—
±250
—
—
—
1
—
—
MAX
5.20
300
1.5
150
250
300
700
40
50
17
5
250
—
—
1.5
30
±400
400
±600
500
20
100
100
MIn
11.52
—
—
—
—
—
—
16
—
—
—
—
80
69
—
—
—
—
—
—
—
—
—
SLH2812S
TYP
12.00
—
—
35
—
60
380
28
—
2.3
1.3
75
87
—
0.3
—
±220
—
—
—
1
—
—
MAX
12.48
125
1.5
200
400
400
700
40
50
17
5
300
—
—
1.2
30
±700
400
±600
500
20
500
100
MIn
14.40
—
—
—
—
—
—
16
—
—
—
—
80
69
—
—
—
—
—
—
—
—
—
SLH2815S
TYP
15.00
—
—
60
—
60
410
28
—
2.4
1.3
60
88
—
0.3
—
±220
—
—
—
1
—
—
MAX
15.60
100
1.5
200
500
650
700
40
50
17
5
300
—
—
1.2
30
±700
400
±600
500
20
500
100
UnITS
VDC
mA
W
mV p-p
mV
mV
VDC
V
mA
mA p-p
%
W
ms
mV pk
µs
mV pk
µs
ms
mV pk
µF
T
C
= 25°C
LOAD 10% TO 100%
nO LOAD TO FULL
COnTInUOUS
TRAnSIEnT
1
50 ms
nO LOAD
InHIBITED
10 KHz - 10 MHz
T
C
= -55°C
TO
+125°C
T
C
= 25°C
V
In
= 16 TO 40 VDC
T
C
= -55°C
TO
+125°C
InPUT CURREnT
InPUT RIPPLE CURREnT
4
EFFICIEnCY
LOAD FAULT
5
SHORT CIRCUIT
POWER DISSIPATIOn
RECOVERY
1
TRAnSIEnT
7
RECOVERY
1, 6
TRAnSIEnT
7
RECOVERY
6
DELAY
OVERSHOOT
1
nO EFFECT On DC
PERFORMAnCE
STEP LOAD RESPOnSE
50% - 100% - 50%
STEP LInE RESPOnSE
1
16 - 40 - 16 VDC
START-UP
8
CAPACITIVE LOAD
1
T
C
= 25°C, EACH OUTPUT
notes:
1. guaranteed by qualification test and/or analysis. not an in-line test.
2. Specified at 50% load.
3. Although no minimum load is required, at no load the output voltage may exceed
rating by up to 15%.
4. An external 6 µH inductor, added in series to the input, is necessary to maintain
specifications.
5. Load fault is a short circuit into 1 . Recovery is into resistive full load.
6. Recovery is time to settle to within 1% of Vout final value.
7. Transition time > 10 µs.
8. Measured from release of inhibit until Vout settles to within 1% of final value at full
load with Vin at 28 V.
www.craneae.com/interpoint
SLH Rev AA - 2013.12.16
Page 5 of 12
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