MODELS
VDC OUTPUT
1
SINGLE
3.3
5
12
15
DUAL
±5
±12
±15
DC/DC C
ONVERTERS
28 V
OLT
I
NPUT
SMHF SERIES
SINGLE AND DUAL
15 WATT
Size (max.): Non flanged 1.460 x 1.130 x 0.330 (37.08 x 28.70 x 8.38 mm)
Flanged 2.005 x 1.130 x 0.330 (50.93 x 28.70 x 8.38 mm)
See Figures 21 through 24 for dimensions.
Weight: 30 grams maximum.
Screening: Standard, Class H, or Class K (MIL-PRF-38534)
Radiation hardness levels O, L, and R
DESCRIPTION
The SMHF Series™ of 28 V DC/DC converters offers a wide input
voltage range of 16 to 40 volts and up to 15 watts of output power.
The units are capable of withstanding short term transients up to 50
volts. The package is a hermetically sealed, seam-welded metal
case. Flanged and non-flanged models are available.
SCREENING AND REPORTS
SMHF converters offer three screening options (Standard, Class H,
or Class K) and three levels of radiation hardness (O, L, and R). See
Tables 1, 2, and 3 for more information. Detailed reports on product
performance are also available and are listed in Table 4.
CONVERTER DESIGN
The SMHF converters are switching regulators that use a quasi-
square wave, single-ended forward converter design with a constant
switching frequency of 550 kHz. Isolation between input and output
circuits is provided with a transformer in the forward path and a
temperature compensated opto-coupler in the feedback control
loop. The opto-coupler is radiation hardened and is especially
selected for space applications.
For the SMHF dual output models, cross regulation is maintained by
tightly coupled output magnetics. Up to 70% of the total output
power is available from either output, providing the opposite output
is simultaneously carrying 30% of the total output power. Predictable
current limit is accomplished by directly monitoring the output load
current and providing a constant current output above the overload
point.
HIGHER POWER DENSITY
The SMHF Series offers a new standard of performance for small
size and high power density. At just 0.33 inch high and a total foot-
print of 1.7 in2, this low profile package offers a total power density
of up to 30 watts per cubic inch.
LOW NOISE,HIGH AUDIO REJECTION
The SMHF converters’ feed-forward compensation system provides
excellent dynamic response and noise rejection. Audio rejection is
typically 50 dB. Typical output voltage response for a 50% to 100%
step load transient is as low as 1.3% with a 150 msec recovery time.
Input ripple current is typically 35 mA p-p with output ripple voltage
typically 30 mV p-p .
INHIBIT FUNCTION
SMHF converters provide an inhibit terminal that can be used to
disable internal switching, resulting in no output and very low quies-
cent input current. The converter is inhibited when a TTL compatible
low (≤0.8 – output disabled) is applied to the inhibit pin. The unit is
enabled when the pin, which is internally connected to a pull-up
resistor, is left unconnected or is connected to an open-collector
gate. The open circuit output voltage associated with the inhibit pin
is 8.5 to 12 VDC. In the inhibit mode, a maximum of 12 mA must be
sunk from the inhibit pin at 28 VDC input.
SYNCHRONIZATION
A synchronization feature is included with the SMHF Series that
allows the user to match the switching frequency of the converter to
the frequency of the system clock. An external synchronization
feature is included that allows the user to adjust the nominally
550kHz operating frequency to any frequency within the range of
500 kHz to 600 kHz. This is initiated by applying a TTL compatible
input of the desired frequency to pin 5.
SHORT CIRCUIT PROTECTION
SMHF Series converters provide short circuit protection by
restricting the output current to approximately 115% of the full load
output current. The output current is sensed in the secondary stage
to provide highly predictable and accurate current limiting, and to
eliminate foldback characteristics.
UNDERVOLTAGE LOCKOUT
Undervoltage lockout prevents the units from operating below
approximately 14 VDC input voltage to keep system current levels
smooth, especially during initialization or re-start operations.
FEATURES
• Fully qualified to Class H or K
• Radiation hardened
• –55° to +125°C operation
• 16 to 40 VDC input
• Fully Isolated
• Red hard optocoupler feedback
• Fixed frequency, 550 kHz typical
• Topology – Single Ended Forward
• Transient protection 50 V/120 ms
• Inhibit function
• Sync function
• Indefinite short circuit protection
• Undervoltage lockout
• Up to 84% efficiency
RECOMMENDED OPERATING CONDITIONS
TYPICAL CHARACTERISTICS
SYNC AND INHIBIT
ABSOLUTE MAXIMUM RATINGS
Input Voltage
• 16 to 40 VDC
Power Dissipation (Pd)
•8 W
Output Power
• 12 to 15 watts depending on model
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Case)
• –65°C to +150°C
2
DC/DC C
ONVERTERS
Output Voltage Temperature Coefficient
• 100 ppm /°C typical
• 150 ppm/°C maximum
Input to Output Capacitance
• 60 pF typical
Undervoltage Lockout
• 12 V input typical
Current Limit
• 115% of full load typical
Isolation
• 100 megohm minimum at 500 V
Audio Rejection
• 50 dB typical
Conversion Frequency (º55°C to +125°C Tc)
• Free run 550 kHz typical
480 kHz min, 620 kHz max
Inhibit Pin Voltage (unit enabled)
• 8.5 to 12 V
Input Voltage Range
• 16 to 40 VDC continuous
• 0 V for up to 50 msec transient
Case Operating Temperature (Tc)
• –55°C to +125°C full power
• –55°C to +135°C absolute
Derating Output Power/Current (Tc)
• Linearly from 100% at 125°C to 0% at 135°C
SMHF SERIES
SINGLE AND DUAL
15 WATT
SINGLE OUTPUT MODELS SMHF283R3S SMHF2805S SMHF2812S SMHF2815S
OUTPUT VOLTAGE Tc = 25°C 3.27 3.3 3.33 4.95 5 5.05 11.88 12 12.12 14.85 15 15.15 VDC
OUTPUT CURRENT VIN = 16 TO 40 VDC — — 2.4 — — 2.4 — — 1.25 — — 1.00 A
OUTPUT POWER VIN = 16 TO 40 VDC 0 — 8 0 — 12 0 — 15 0 — 15 W
OUTPUT RIPPLE 10 kHz - 2 MHz — 60 160 — 30 80 — 60 160 — 60 75 mV p-p
VOLTAGE Tc = –55°C TO +125°C — 80 240 — 150 240 — 50 120 — 100 260
LINE REGULATION VIN = 16 TO 40 VDC — 5 100 — 5 100 — 5 100 — 5 100 mV
LOAD REGULATION NO LOAD TO FULL — 20 50 — 20 50 — 20 50 — 20 50 mV
INPUT VOLTAGE CONTINUOUS 16 28 40 16 28 40 16 28 40 16 28 40 VDC
NO LOAD TO FULL TRANSIENT 120 ms 0 — 50 0 — 50 0 — 50 0 — 50 V
INPUT CURRENT NO LOAD — 25 65 — 25 40 — 25 50 — 25 62
FULL LOAD — — 397 — 560 624 — 680 752 — 670 752 mA
INHIBITED — 5 12 — 5 12 — 5 12 — 5 12
INPUT RIPPLE 10k Hz - 10 MHz — 45 80 — 35 80 — 35 80 — 35 80 mA p-p
CURRENT Tc = –55°C TO +125°C — — 120 — — 120 — — 120 — — 120
EFFICIENCY Tc = 25°C 70 73 — 73 75 — 78 79 — 74 80 — %
LOAD FAULT1SHORT CIRCUIT
POWER DISSIPATION — 5 8 — 3.5 8 — 3.5 8 — 3.5 7 W
RECOVERY2— 7.5 30 — 7.5 30 — 7.5 30 — 7.5 30 ms
STEP LOAD 50 %–100%– 50%
RESPONSE TRANSIENT –400 150 500 –500 150 500 –700 150 700 –800 200 800 mV pk
RECOVERY2— 150 300 — 150 300 — 150 500 — 600 1200 µs
STEP LINE 16 TO 40 TO 16 VIN
RESPONSE TRANSIENT3–800 550 800 –800 550 800 –800 550 800 –800 550 800 mV pk
RECOVERY2— 0.8 1.2 — 0.8 1.2 — 0.8 1.2 — 0.8 1.2 µs
START-UP DELAY — 10 25 — 10 25 — 10 25 — 10 25 µs
0 TO 28 VIN OVERSHOOT4— 200 300 — 100 600 — 200 1200 — 200 1500 mV pk
Notes
1. Indefinite short circuit protection not guaranteed above 125°C (case)
2. Recovery time is measured from application of the transient
to the point at which Vout is within regulation.
3. Input step transition time >10µs.
4. Input step transition time <100µs.
Sync In (500 to 600 kHz)
• Duty cycle 40% to 60%
• Logic low 0.8 V max
• Logic high 4.5 V min, 5 V max
• Referenced to input common
• If not used, connect to input common
Inhibit TTL Open Collector
• Logic low (output disabled)
Logic low voltage ≤0.8 V max
Inhibit pin current 4.0 mA max
• Referenced to input common
• Logic high (output enabled)
Open collector or unconnected
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, radiation level O, unless otherwise specified.
3
DC/DC C
ONVERTERS
SMHF SERIES
SINGLE AND DUAL
15 WATT
DUAL OUTPUT MODELS SMHF2805D SMHF2812D SMHF2815D
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
OUTPUT VOLTAGE +VOUT 4.95 5.00 5.05 11.88 12.00 12.12 14.85 15.00 15.15 VDC
–VOUT 4.92 5.00 5.08 11.82 12.00 1218 14.78 15.00 15.23
OUTPUT CURRENT1VIN = 16 to 40 VDC — ±1.2 1.68 — ±0.625 0.875 — ±0.500 0.700 A
OUTPUT POWER1VIN = 16 to 40 VDC — — 12 — — 15 — — 15 W
OUTPUT RIPPLE 10 kHz - 2 MHz — 60 160 — 70 175 — 70 175
VOLTAGE ±VOUT Tc = –55°C to +125°C — 100 240 — 100 275 — 100 275 mV p-p
LINE REGULATION BALANCED +VOUT — 5 50 — 5 50 — 5 50 mV
Vin = 16 to 40 VDC LOAD –VOUT — — 100 — — 100 — — 100
LOAD REGULATION BALANCED +VOUT — 20 50 — 20 50 — 20 50 mV
LOAD –VOUT — — 150 — — 150 — — 150
CROSS REGULATION2NEGATIVE VOUT — 6 7.5 — 3 6 — 3 6 %
INPUT VOLTAGE CONTINUOUS 16 28 40 16 28 40 16 28 40 VDC
NO LOAD TO FULL TRANSIENT 50 msec — — 50 — — 50 — — 50 V
INPUT CURRENT NO LOAD — 20 50 — 25 50 — 25 50
FULL LOAD — 540 600 — 645 754 — 638 754 mA
INHIBITED — 6 12 — 5 12 — 5 12
INPUT RIPPLE 10 kHz - 10 MHz — 30 80 — 40 80 — 40 80
CURRENT Tc = –55°C to +125°C — 60 120 — 55 120 — 55 120 mA p-p
EFFICIENCY 75 77 — 74 81 — 74 82 — %
LOAD FAULT SHORT CIRCUIT3
POWER DISSIPATION — 3 8 — 3 6 — 3 6 W
RECOVERY4— 7.5 30 — 7.5 50 — 7.5 50 ms
STEP LOAD RESP.550% – 100% – 50%
BALANCED LOADS TRANSIENT +VOUT –600 200 600 –600 300 600 –600 300 600 mV pk
–VOUT –600 150 600 –600 100 500 –600 100 600
RECOVERY4— 150 500 — 200 500 — 200 600 µs
STEP LINE RESP. 16 – 40 – 40 VDC
±V
OUT TRANSIENT6–800 600 800 –750 550 750 –750 550 750 mV pk
RECOVERY4— 0.8 1.2 — 0.8 1.2 — 0.8 1.2 ms
START-UP DELAY — 12 30 — 12 25 — 12 25 ms
OVERSHOOT70 100 500 0 200 500 0 200 500 mV pk
Notes
1. Up to 70% of the total output power is available from either output providing
the opposite output is simultaneously carrying 30% of the total output
power. Each output must carry a minimum of 30% of the total output
power in order to maintain regulation on the negative outputs.
2. Effect on –Vout for the following conditions, percentages are of total power:
+Po = 50% to 10% and –Po = 50%
+Po = 50% and –Po = 50% to 10%
3. Indefinite short circuit protection not guaranteed above 125°C (case)
4. Recovery time is measured from application of the transient to point at
which Vout is within regulation.
5. Response of either output with the opposite output held at half of the total
output power.
6. Input step transition time >10µs.
7. Input step transition time <100µs.
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, radiation level O, unless otherwise specified.
4
DC/DC C
ONVERTERS
SMHF SERIES
SINGLE AND DUAL
15 WATT
PWM
Controller
ID
IC
Limit Ref.
Output
Common
Positive
Output
Positive
Input
Inhibit
Input
Common
5 µH
2 µF
BLOCK DIAGRAM
FIGURE 1: SMHF SINGLE OUTPUT
DC/DC C
ONVERTERS
SMHF SERIES
SINGLE AND DUAL
15 WATT
PIN OUT
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)
5
MODEL NUMBERING KEY
Pin Single Output Dual Output
1 Inhibit Inhibit
2 No connection Positive Output
3 Output Common Output Common
4 Positive Output Negative Output
51Sync Sync
6 Case Ground Case Ground
7 Input Common Input Common
8 Positive Input Positive Input
1. If Sync is not used, pin 5 should be connected to input common.
FIGURE 2: PIN OUT
BOTTOM VIEW
SMHF SINGLE AND DUAL
NON-FLANGED OR FLANGED
Dot on top of cover
indicates pin one.
Dotted line outlines flanged package option.
1 2345
876
See Figures 21 through 24 for dimensions.
SMD NUMBERS
STANDARD MICROCIRCUIT
DRAWING (SMD)
5962-9213902HXC
IN PROCESS
5962-9160102HXC
5962-9555902HXC
5962-9214402HXC
5962-9161402HXC
SMHF
SIMILAR PART
SMHF2805S/HO
SMHF2812S/HO
SMHF2815S/HO
SMHF2805D/HO
SMHF2812D/HO
SMHF2815D/HP
To indicate the flanged case option change the “X” to “Z” In the
SMD number. The SMD number shown is for Class H
screening, non-flanged, and no Radiation Hardness Assurance
(RHA) level. See the SMD for the numbers for other screening
and radiation levels. For exact specifications for an SMD
product, refer to the SMD drawing. Call your Interpoint repre-
sentative for status on the SMHF SMD releases which are “in
process.” SMDs can be downloaded from
http://www.dscc.dla.mil/programs/smcr
DC/DC C
ONVERTERS
SMHF SERIES
SINGLE AND DUAL
15 WATT
6
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
FIGURE 6FIGURE 8
OUTPUT POWER (Watts)
SMHF2805D EFFICIENCY
EFFICIENCY (%)
40
90
80
70
60
50
2
46 81012
40V
28V
16V
OUTPUT POWER (Watts)
SMHF2815D EFFICIENCY
EFFICIENCY (%)
40
90
80
70
60
50
2 4 6 8 10 12 14
40V
28V
16V
OUTPUT POWER (Watts)
SMHF 2805S EFFICIENCY
EFFICIENCY (%)
40
90
80
70
60
50
246 81012
16V
28V
40V
FIGURE 3
OUTPUT POWER (Watts)
SMHF2812S EFFICIENCY
EFFICIENCY (%)
40
90
80
70
60
50
2
46 8101214
16V
40V
28V
15
FIGURE 4
OUTPUT POWER (Watts)
SMHF2812D EFFICIENCY
EFFICIENCY (%)
40
90
80
70
60
50
2468101214
40V
28V
16V
15
FIGURE 7
FIGURE 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 1 10 100
–90
–80
–70
–60
–50
–40
–20
–10
0
–30
FIGURE 9
1ms/div
16V TO 40V
SMHF2805S STEP LINE RESPONSE
500mV/div.
V
IN
20V/div.
VOUT
FIGURE 10 FIGURE 11
50µs/div
50% 100%
SMHF2805S STEP LOAD RESPONSE
100mV/div.
50% to 100%
100% to 50%
DC/DC C
ONVERTERS
SMHF SERIES
SINGLE AND DUAL
15 WATT
7
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
FIGURE 18 FIGURE 20
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
50µs/div
50% 100%
SMHF2815D +V STEP LOAD RESPONSE
100mV/div.
50% to 100%
100% to 50% PO= 7.5 W
FIGURE 15
50µs/div
20% 100%
SMHF+2815D VOUT STEP LOAD RESPONSE
100mV/div.
20% to 100%
100% to 20%
PO= 7.5 W
FIGURE 16
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
FIGURE 19
FIGURE 17
2 ms/div
SMHF2815D TURN-ON INTO FULL LOAD
20V/div.
V
IN
5V/div.
+VOUT
–VOUT
FIGURE 12 FIGURE 14
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
FIGURE 13
8
DC/DC C
ONVERTERS
SMHF SERIES
SINGLE AND DUAL
15 WATT
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.
CASE E
BOTTOM VIEW
See Figure 22
for pin configurations.
Squared corner and dot on top
of case indicate pin one.
1.460 max
(37.08)
1.130 max
(28.70)
Materials
Header Cold Rolled Steel/Nickel/Gold
Cover Kovar/Nickel
(SMHF Series
Cold Rolled Steel/Nickel/Gold)
Pins #52 alloy/Gold
compression 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.
FIGURE 21: CASE E MAXIMUM DIMENSIONS
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)
12345
0.030 dia.
(0.76)
876
SMHF Series Single and Dual
BOTTOM VIEW CASE E1
Projection Weld Squared corner and dot on top
of case indicate pin one.
FIGURE 22: CASE E1
9
DC/DC C
ONVERTERS
SMHF SERIES
SINGLE AND DUAL
15 WATT
Materials
Header Cold Rolled Steel/Nickel/Gold
Cover MHF+ Series and FMH Filter
Kovar/Nickel
SMHF
Cold Rolled Steel/Nickel
Pins #52 alloy (all cases)
compression glass seal
Case dimensions in inches (mm)
Tolerance ±0.005 (0.13) for three decimal places
±0.01 (0.2) for two decimal places
unless otherwise specified
CASE G
BOTTOM VIEW
Flanged package
See Figure 24
for pin configuration
2.005 max
(50.93)
1.130 max
(28.70)
Squared corner and dot on top
of case indicate pin one.
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.
Flange Thickness: 0.047 (1.19)
FIGURE 23: CASE G MAXIMUM DIMENSIONS
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
SMHF Series Single and Dual
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)
12345
87
6
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
FIGURE 24: CASE G1
10
DC/DC C
ONVERTERS
SMHF SERIES
SINGLE AND DUAL
15 WATT
ELEMENT EVALUATION STANDARD CLASS CLASS
TEST PERFORMED (O) H K
(COMPONENT LEVEL) M/S P M/S P M/S P
Element Electrical yes no yes yes yes yes
Element Visual no no yes yes yes yes
Internal Visual no no yes no yes no
Temperature Cycling no no no no yes yes
Constant Acceleration no no no no yes yes
Interim Electrical no no no no yes no
Burn-in no no no no yes no
Post Burn-in Electrical no no no no yes no
Steady State Life no no no no yes no
Voltage Conditioning /Aging no no no no no yes
Visual Inspection no no no no no yes
Final Electrical no no yes yes yes yes
Wire Bond Evaluation no no yes yes yes yes
SEM no no no no yes no
SLAM™/C-SAM:
Input capacitors only no no no yes no yes
(Add’l test, not req. by H or K)
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
Notes
M/S Active components (Microcircuit and Semiconductor Die)
P Passive components
TABLE 1: ELEMENT EVALUATION
11
DC/DC C
ONVERTERS
SMHF SERIES
SINGLE AND DUAL
15 WATT
ENVIRONMENTAL SCREENING
TEST PERFORMED STANDARD CLASS CLASS
(END ITEM LEVEL)(O)HK
Non-destruct bond pull
Method 2023 no no yes
Pre-cap inspection
Method 2017, 2032 yes yes yes
Temperature cycle
Method 1010, Cond. C yes yes yes
Constant acceleration
Method 2001, 3000 g yes yes yes
PIND Test
Method 2020, Cond. B no no yes
Radiography
Method 2012 no no yes
Pre burn-in test yes yes yes
Burn-in, Method 1015, 125°C
96 hours yes no no
160 hours no yes no
2 x 160 hour (includes mid BI test) no no yes
Final electrical test
MIL-PRF-38534, Group A yes yes yes
Hermeticity test
Fine Leak,
Method 1014, Cond. A yes yes yes
Gross Leak,
Method 1014, Cond. C 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.
TABLE 2: PRODUCT ENVIRONMENTAL SCREENING
12
DC/DC C
ONVERTERS
SMHF SERIES
SINGLE AND DUAL
15 WATT
11921-001-DTS Rev A This revision supercedes all previous releases.
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. SMHF Series is a trademark of Interpoint. Copyright
© 1997-2000 Interpoint. All rights reserved.
PRODUCT LEVEL AVAILABILITY ENVIRONMENTAL SCREENING LEVELS
STANDARD CLASS CLASS
RADIATION HARDNESS LEVELS (O) H K
O: Standard, no radiation guarantee
For system evaluation, electrically OO HO Not
and mechanically comparable to available
H and K level.
L: Radiation hardened – Tested lots Not
Up to 50 k Rads (Si) total dose available HL KL
No SEU guarantee
R: Radiation hardened – Tested lots Not
Up to 100 k Rads (Si) total dose available HR KR
SEU guarantee up to 40 MeV
TABLE 4:
REPORTS INCLUDED 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
HO option: Reports 2, 3, and 4 are included with purchase.
OO option: Select reports available as separate purchases.
TABLE 3: RADIATION HARDNESS LEVELS
L and R are referenced to MIL-PRF-38534, appendix G, Radiation Hardness
Assurance (RHA) levels.
Contact Information:
Interpoint Headquarters USA
Phone: 1-800-822-8782
+425-882-3100
Email: power@intp.com
www.interpoint.com
Interpoint UK
Phone: +44-1252-815511
Email: poweruk@intp.com
Interpoint France
Phone: +33-134285455
Email: powerfr@intp.com
