FEATURES
DESCRIPTION
Sc r e e n i n g
co n v e r t e r De S i g n
Hi g H e r Po w e r De n S i t y
Lo w no i S e , Hi g H Au D i o re j e c t i o n
in H i b i t Fu n c t i o n
MODELS
vDc
Crane Aerospace & Electronics Power Solutions
SMHF Single and Dual DC/DC Converters
28 VOLT INPUT – 15 WATT
Sy n c H r o n i z A t i o n
SH o r t ci r c u i t Pr o t e c t i o n
un D e r v o L t A g e Lo c k o u t
PWM
Controller
ID
IC
Limit Ref.
Output
Common
Positive
Output
Positive
Input
Inhibit
Input
Common
5 µH
2 µF
FET
Driver
Fi g u r e 1: SMHF Si n g l e Ou t p u t - Bl O c k Di a g r a M
Crane Aerospace & Electronics Power Solutions
SMHF Single and Dual DC/DC Converters
28 VOLT INPUT – 15 WATT
OPERATING CONDITIONS AND CHARACTERISTICS
Input Voltage Range
Power Dissipation (Pd)
Output Power
Lead Soldering Temperature (10 sec per lead)
Storage Temperature Range (Case)
Case Operating Temperature (Tc)
Derating Output Power/Current (Tc)
Output Voltage Temperature Coefficient
Input to Output Capacitance
Current Limit
Isolation
Audio Rejection
Conversion Frequency (º55°C to +125°C Tc)
Inhibit Pin Voltage (unit enabled)
Undervoltage Lockout
MECHANICAL AND ENVIRONMENTAL
Size (maximum)
Weight (maximum)
Screening
SYNC AND INHIBIT
Sync In (500 to 600 kHz)
Inhibit TTL Open Collector
Crane Aerospace & Electronics Power Solutions
SMHF Single and Dual DC/DC Converters
28 VOLT INPUT – 15 WATT
Fi g u r e 2: pin Ou t
BOTTOM VIEW
SMHF SINGLE AND DUAL
NON-FLANGED OR FLANGED
Dot on top of cover
indicates pin one.
Dotted line outlines flanged package option.
12345
8 7 6
Pin Single Output Dual Output
PIN OUT
Crane Aerospace & Electronics Power Solutions
SMHF Single and Dual DC/DC Converters
28 VOLT INPUT – 15 WATT
MODEL NUMBERING KEY
SMHF 28 05 S F / K R
Base Model
Input Voltage
Output Voltage
Screening
Number of Outputs
(S = single, D = dual)
Radiation Level
Case Option
(Non-flanged case has no designator
in this position)
SMD NUMBERS
St a n D a r D Mi c r O c i r c u i t
Dr a w i n g (SMD)
SMHF SiMilar pa r t
MODEL SELECTION
Crane Aerospace & Electronics Power Solutions
SMHF Single and Dual DC/DC Converters
28 VOLT INPUT – 15 WATT
1. Guaranteed by design, not tested.
unitS
paraMeter cOnDitiOnS
Output VOltage tc = 25°c VDc
Output current Vin = 16 t O 40 VDc a
Output pOwer Vin = 16 t O 40 VDc w
Output ripple 10 kHz - 2 MHz
tc = -55°c tO +125°c
line regulatiOn Vin = 16 tO 40 VDc
lOaD regulatiOn nO lOaD tO Full
input VOltage
nO lOaD tO Full
cOntinuOuS
VDc
V
1
input current nO lOaD
inHiBiteD
input ripple
current
10 kHz - 10 MHz
tc = -55°c tO +125°c
eFFiciencY tc = 25°c %
lOaD Fault2SHOrt circuit
pOwer DiSSipatiOn
w
recOVerY1, 3
Step lOaD
reSpOnSe
50% - 100% - 50%
tranSient4
recOVerY3
Step line
reSpOnSe1
16 - 40 -16 VDc
tranSient4
recOVerY3
Start-up
0 tO 28 VDc
DelaY
OVerSHOOt1, 4
capacitiVe lOaD tc = 25°c
Crane Aerospace & Electronics Power Solutions
SMHF Single and Dual DC/DC Converters
28 VOLT INPUT – 15 WATT
1. Guaranteed by design, not tested.
unitS
paraMeter cOnDitiOnS
Output VOltage tc = 25°c VDc
Output current Vin = 16 t O 40 VDc a
Output pOwer Vin = 16 t O 40 VDc w
Output ripple 10 kHz - 2 MHz
tc = -55°c tO +125°c
line regulatiOn Vin = 16 tO 40 VDc
lOaD regulatiOn nO lOaD tO Full
input VOltage
nO lOaD tO Full
cOntinuOuS
VDc
V
1
input current nO lOaD
inHiBiteD
input ripple
current
10 kHz - 10 MHz
tc = -55°c tO +125°c
eFFiciencY tc = 25°c %
lOaD Fault2SHOrt circuit
pOwer DiSSipatiOn
w
recOVerY1, 3
Step lOaD
reSpOnSe
50% - 100% - 50%
tranSient4
recOVerY3
Step line
reSpOnSe1
16 - 40 -16 VDc
tranSient4
recOVerY3
Start-up
0 tO 28 VDc
DelaY
OVerSHOOt1, 4
capacitiVe lOaD tc = 25°c
Crane Aerospace & Electronics Power Solutions
SMHF Single and Dual DC/DC Converters
28 VOLT INPUT – 15 WATT
1. Guaranteed by design, not tested.
unitS
paraMeter cOnDitiOnS
Output VOltage + VOut
VDc
- VOut
Output current2Vin = 16 tO 40 VDc a
Output pOwer2Vin = 16 tO 40 VDc w
Output ripple
± VOut
10 kHz - 2 MHz
tc = -55°c tO +125°c
line regulatiOn
Vin = 16 tO 40 VDc BalanceD lOaD
+ VOut
- VOut
lOaD regulati
BalanceD lOaD
+ VOut
- VOut
crOSS regulatiOn3eFFect On - VOut %
input VOltage
nO lOaD tO Full
cOntinuOuS
VDc
V
1
input current nO lOaD
inHiBiteD
input ripple
current
10 kHz - 10 MHz
tc = -55°c tO +125°c
eFFiciencY %
lOaD Fault4SHOrt circuit
pOwer DiSSipatiOn
w
recOVerY1, 5
Step lOaD
reSpOnSe6
BalanceD lOaDS
50% - 100% - 50%
tranSient7+ VOut
- VOut
recOVerY5
Step line
reSpOnSe1
± VOut
16 - 40 -16 VDc tranSient7
recOVerY5
Start-up
0 tO 40 V
DelaY
OVerSHOOt1, 7
capacitiVe lOaD tc = 25°c
Crane Aerospace & Electronics Power Solutions
SMHF Single and Dual DC/DC Converters
28 VOLT INPUT – 15 WATT
OUTPUT POWER (Watts)
SMHF2805D EFFICIENCY
EFFICIENCY (%)
40
90
80
70
60
50
2
4681012
40V
28V
16V
OUTPUT POWER (Watts)
SMHF2815D EFFICIENCY
EFFICIENCY (%)
40
90
80
70
60
50
246810 12 14
40V
28V
16V
OUTPUT POWER (Watts)
SMHF2812D EFFICIENCY
EFFICIENCY (%)
40
90
80
70
60
50
2468101214
40V
28V
16V
15
Fi g u r e 6 Fi g u r e 8
Fi g u r e 7
OUTPUT POWER (Watts)
SMHF 2805S EFFICIENCY
EFFICIENCY (%)
40
90
80
70
60
50
2 4 6 8 10 12
16V
28V
40V
OUTPUT POWER (Watts)
SMHF2812S EFFICIENCY
EFFICIENCY (%)
40
90
80
70
60
50
2
4681012 14
16V
40V
28V
15
Fi g u r e 3 Fi g u r e 4 Fi g u r e 5
OUTPUT POWER (Watts)
SMHF2815S EFFICIENCY
EFFICIENCY (%)
40
90
80
70
60
50
2468101214
16V
40V
15
28V
FREQUENCY (kHz)
SMHF SERIES AUDIO REJECTION
ATTENUATION (dB)
–1000.1 110 100
–90
–80
–70
–60
–50
–40
–20
–10
0
–30
1ms/div
16V TO 40V
SMHF2805S STEP LINE RESPONSE
500mV/div.
VIN
20V/div.
VOUT
Fi g u r e 9 Fi g u r e 10 Fi g u r e 11
50µs/div
50% 100%
SMHF2805S STEP LOAD RESPONSE
100mV/div.
50% to 100%
100% to 50%
Crane Aerospace & Electronics Power Solutions
SMHF Single and Dual DC/DC Converters
28 VOLT INPUT – 15 WATT
POSITIVE OUTPUT LOAD (% OF TOTAL LOAD)
–VOUT WITH SHIFT IN LOAD BALANCE
CROSS REGULATION
–V
OUT
VOLTAGE CHANGE (%)
–10 1000 20 40 60 80
–5
0
5
10
2812D
2815D
2805D
OUTPUT POWER (Watts)
50 mV DROP
LOW LINE DROPOUT VS. LOAD
INPUT VOLTAGE (Volts)
10 11 12 13 14 15
14
15
16
SMHF2812S&D
SMHF2815S&D
SMHF2805S&D
13
12
OUTPUT LOAD (%)
COND. A: 50% LOAD +V; 50% to 10% –V
COND. B: 50% LOAD –V; 50% to 10% +V
SMHF2805D/SMHF2812D/SMHF2815D
CROSS REGULATION
–V
OUT
VOLTAGE CHANGE (%)
–10
0
10
10 20 30 40 50
–8
–6
–4
–2
2
4
6
8
2815D
2812D
2812D
COND B
COND A
2805D
2805D
Fi g u r e 18 Fi g u r e 20Fi g u r e 19
50µs/div
50% 100%
SMHF2815D +V
OUT
STEP LOAD RESPONSE
100mV/div.
50% to 100%
100% to 50% PO= 7.5 W
50µs/div
20% 100%
SMHF+2815D VOUT STEP LOAD RESPONSE
100mV/div.
20% to 100%
100% to 20%
PO= 7.5 W
Fi g u r e 15 Fi g u r e 16 Fi g u r e 17
2 ms/div
SMHF2815D TURN-ON INTO FULL LOAD
20V/div.
V
IN
5V/div.
+VOUT
–VOUT
200µs/div
10% 100%
SMHF2805S STEP LOAD RESPONSE
100mV/div.
10% to 100%
100% to 10%
1 ms/div
16V TO 40V
SMHF2815D STEP LINE RESPONSE
200mV/div.
V
IN
20V/div.
+VOUT
2 ms/div
SMHF2805S TURN-ON INTO FULL LOAD
1V/div.
V
IN
20V/div.
VOUT POUT= 12W
Fi g u r e 12 Fi g u r e 14
Fi g u r e 13
Crane Aerospace & Electronics Power Solutions
SMHF Single and Dual DC/DC Converters
28 VOLT INPUT – 15 WATT
0.000
0.205 (5.21)
0.505 (12.83)
0.705 (17.91)
0.905 (22.99)
1.105 (28.07)
0.330 max.
(8.38)
0.000
0.25 (6.35)
0.000
0.160 (4.06)
0.960 (24.38)
1 2345
0.030 dia.
(0.76)
8 76
BOTTOM VIEW CASE E1
Projection Weld Squared corner and dot on top
of case indicate pin one.
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.
Materials
Header Cold Rolled Steel/Nickel/Gold
Cover Kovar/Nickel
Pins #52 alloy/Gold compression glass seal
Case E1, Rev C, 20061221
Please refer to the numerical dimensions for accuracy. All 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.
Copyright © 1999-2006 Interpoint Corp. All rights reserved.
1.130 max. (28.70)
1.460 max. (37.08)
Fi g u r e 21: ca S e e1
Crane Aerospace & Electronics Power Solutions
SMHF Single and Dual DC/DC Converter Cases
28 VOLT INPUT – 15 WATT
1.590 (40.39)
0.128 dia
(3.25)
0.030 dia.
(0.76)
Flanged cases: Designator "F" required in Case Option position of model number.
BOTTOM VIEW CASE G1
0.000
0.205 (5.21)
0.505 (12.83)
0.705 (17.91)
0.905 (22.99)
1.105 (28.07)
0.000
0.160 (4.06)
0.960 (24.38)
1 2345
8 76
0.140 (3.56)
0.560 (14.22)
0.330 max.
(8.38)
0.000
0.25 (6.35)
Squared corner and dot on top
of case indicate pin one.
Projection Weld
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.
Materials
Header Cold Rolled Steel/Nickel/Gold
Cover Cold Rolled Steel/Nickel/Gold
Pins #52 alloy/Gold compression glass seal
Case G1, Rev C, 20061221
Please refer to the numerical dimensions for accuracy. All 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.
Copyright © 1999-2006 Interpoint Corp. All rights reserved.
1.130 max. (28.70)
Flange thickness: 0.047 (1.19)
2.005 max
(50.93)
2.005 max. (50.93)
Fi g u r e 22: ca S e g1
Crane Aerospace & Electronics Power Solutions
SMHF Single and Dual DC/DC Converter Cases
28 VOLT INPUT – 15 WATT
Cl a s s H a n d K, MIl-PRF-38534 El E M E n t Ev a l u a t I o n
COMPONENT-LEVEL TEST
PERFORMED
SPACE PROTOTYPE (O)
NON-QML1
CLASS H
QML
CLASS K
QML
M/s2P3M/s2P3M/s2P3
Element Electrical yes no yes yes yes yes
Element Visual no no yes yes yes yes
Internal Visual no N/A yes N/A yes N/A
Temperature Cycling no no no no yes yes
Constant Acceleration no no no no yes yes
Interim Electrical no N/A no N/A yes N/A
Burn-in no N/A no N/A yes N/A
Post Burn-in Electrical no N/A no N/A yes N/A
Steady State Life no N/A no N/A yes N/A
Voltage Conditioning Aging N/A no N/A no N/A yes
Visual Inspection no no N/A no N/A yes
Final Electrical no no yes yes yes yes
Wire Bond Evaluation4no no yes yes yes yes
SEM no N/A no N/A yes N/A
SLAM™/C-SAM:
Input capacitors only
(Add’l test, not req. by H or K)
no no no yes no yes
Notes:
1. Non-QML products do not meet all of the requirements of MIL-PRF-38534.
2. M/S = Active components (Microcircuit and Semiconductor Die)
3. P = Passive components
4. Not applicable to EMI filters that have no wirebonds.
Definitions:
Element Evaluation: Component testing/screening per MIL-STD-883 as determined by MIL-PRF-38534
SEM: Scanning Electron Microscopy
SLAM™: Scanning Laser Acoustic Microscopy
C-SAM: C - Mode Scanning Acoustic Microscopy
Crane Aerospace & Electronics Power Solutions
SMHF Single and Dual DC/DC Converters
28 VOLT INPUT – 15 WATT
Cl a s s H a n d K, MIl-PRF-38534 En v I R o n M E n t a l sC R E E n I n g
END ITEM-LEVEL TEST
PERFORMED
SPACE PROTOTYPE (O)
NON-QML1
CLASS H
QML
CLASS K
QML
Non-destruct bond pull2
Method 2023
no yes3yes
Pre-cap Inspection
Method 2017, 2032
yes yes yes
Temperature Cycle (10 times)
Method 1010, Cond. C, -65°C to 150°C, ambient yes yes yes
Constant Acceleration
Method 2001, 3000 g yes yes yes
PIND Test
Method 2020, Cond. A no yes3yes
Pre burn-in test yes yes yes
Burn-in
Method 1015, 125°C case, typical
96 hours
160 hours
2 x 160 hours (includes mid-BI test)
yes
no
no
no
yes
no
no
no
yes
Final Electrical Test MIL-PRF-38534
Group A, Subgroups 1 through 6
-55°C, +25°C, +125°C case yes yes yes
Radiography
Method 2012 N/A N/A N/A
Post Radiography Electrical Test
Room temperature N/A N/A yes3
Hermeticity Test
Fine Leak, Method 1014, Cond. A
Gross Leak, Method 1014, Cond. C
yes
yes
yes
yes
yes
yes
Final visual inspection
Method 2009 yes yes yes
Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534.
Notes:
1. Space Prototype (O), non-QML products, do not meet all of the requirements of MIL-PRF-38534.
2. Not applicable to EMI filters that have no wirebonds.
3. Not required by DSCC but performed to assure product quality.
Crane Aerospace & Electronics Power Solutions
SMHF Single and Dual DC/DC Converters
28 VOLT INPUT – 15 WATT
Cl a s s H a n d K, MIl-PRF-38534 Ra d I a t I o n as s u R a n C E
RadIatIon HaRdnEss
assuRanCE lEvEls
EnvIRonMEntal sCREEnIng lEvEls
sPaCE
PRototYPE (o)
n o n -QMl3
Class H
QMl
Class K
QMl
O2: Standard, no radiation guarantee
OO HO N/A
P5: Radiation tolerant–Tested lots up to 30 K
Rads (Si) total dose
SEU guarantee up to 40 MeV
N/A HP4KP4
R5: Radiation tolerant–Tested lots up to 100 K
Rads (Si) total dose
SEU guarantee up to 40 MeV
N/A HR4KR4
F5: [SMRT only] Radiation tolerant–Tested lots
up to 300 K Rads (Si) total dose SEU guar-
antee up to 60 MeV
N/A N/A KF4
H1,5: Radiation tolerant–Tested lots up to 1,000
K Rads (Si) total dose N/A HH4KH4
Notes:
1. Our EMI filters are designed exclusively with passive components providing maximum tolerance for space environment requirements.
2. 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”.
3. Space Prototype (O), non-QML, products do not meet all of the requirements of MIL-PRF-38534.
4. Redmond site, Interpoint, has a Radiation Hardness assurance plan on file with DSCC. Our SMD products with RHA “P”, “R," "F" and "H"
code meet DSCC requirements.
5. Space converters are available with Radiation Hardness Assurance (RHA) levels of “O” and “R” with the following exceptions:
SMRT28xxx is only available with Radiation Hardness Assurance (RHA) levels of “O” “P”, “R” and “F”.
SMHP120xxx is only available with Radiation Hardness Assurance (RHA) level of “O”.
Space filters are only available with Radiation Hardness Assurance (RHA) levels of “O” and “H”.
Crane Aerospace & Electronics Power Solutions
SMHF Single and Dual DC/DC Converters
28 VOLT INPUT – 15 WATT
