SVHF2800D Series
HIGH RELIABILITY HYBRID
RADIATION TOLERANT DC-DC CONVERTERS
DESCRIPTION
The SVHF series of high reliability DC-DC converters is
operable over the full military temperature range (-55 °C to
+125 °C) with no power derating. Paramount to the SVHF
series is a magnetic feedback circuit that is radiation
immune. Operating at a nominal fixed frequency of
450 kHz, these regulated, isolated units utilize well-
controlled undervoltage lockout circuitry to eliminate slow
start-up problems.
The SVHF series is specifically designed for the harsh
radiation environment of space applications. Performance
is guaranteed through the use of hardened semiconductor
components, radiation lot acceptance testing (RLAT) of
non-hardened components and analysis. The SVHF
series has been characterized for Total Ionizing Dose
(TID) performance including Enhanced Low Dose Rate
Sensitivity (ELDRS) and for Single Event Effects (SEE)
according to VPT’s DLA approved Radiation Hardness
Assurance (RHA) plan per MIL-PRF-38534, Appendix G.
Characterization is performed at both the component level
and at the SVHF series hybrid converter level.
These converters are designed and manufactured in a
facility qualified to ISO9001 and certified to MIL-PRF-
38534 Class H and Class K and MIL-STD-883.
This product may incorporate one or more of the following
U.S. patents:
5,784,266
6,005,780
5,790,389
6,084,792
5,963,438
6,118,673
5,999,433
FEATURES
Guaranteed TID Performance to 30 krad(Si)
including ELDRS, per VPT’s RHA plan specified per
MIL-PRF-38534, Appendix G, Level P with 2X
margin.
Characterized to 44 MeV-cm
2
/mg with minor
transients only; no dropouts, shutdowns, latch up or
burn out.
High Reliability
Very Low Output Noise
Wide Input Voltage Range: 15 to 50 Volts per MIL-
STD-704
Up to 20 Watts Output Power
Radiation Immune Magnetic Feedback Circuit
NO Use of Optoisolators
Undervoltage Lockout
Current Limit and Short Circuit Protection
High Input Transient Voltage: 80 Volts for 1 sec per
MIL-STD-704A
Precision Projection Welded Hermetic Package
High Power Density: > 37 W/in
3
Custom Modified Versions May Be Available
Additional Environmental Screening Available
Meets MIL-STD-461 Revisions C, D, E and F EMC
Requirements When Used With VPT’s EMI Filters
Flanged and Non-flanged Versions Available
MIL-PRF-38534 Element Evaluated Components
Worst Case analysis, Stress, Radiation, and
Reliability reports available
1
Figure 1
– SVHF2800D / SVHF2800DF DC-DC Converter
(Exact
marking may differ from that shown)
1
Subject to all export restrictions and export regulations including but not limited to the Export Administration and Foreign Assets Control Regulations.
Further restrictions may apply contact VPT for details.
11314 4th Avenue
West, Suite 206
Everett, WA 98204
http://www.vpt-inc.com
Sales Information:
Phone: (425) 353-3010
Fax: (425) 353-4030
E-mail: vptsales@vpt-inc.com
SVHF2800D-2.0
1
SVHF2800D Series
SPECIFICATIONS
(T
CASE
= -55°C to +125°C, V
IN
= +28V ± 5%, Full Load
5
, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
Input Voltage (Transient, 1 second)
Output Power
1
Power Dissipation (Full Load, T
CASE
= +125°C)
50 V
DC
80 Volts
20 Watts
6 Watts
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight
(Maximum)
(Un-Flanged / Flanged)
SVHF2805D
Min
Typ
Max
Min
SVHF2812D
Typ
Max
+12°C
-65°C to +150°C
270°C
(24 / 28)
Grams
Parameter
Conditions
8
Units
STATIC
INPUT
4
Voltage
Current
Ripple Current
Inhibit Pin Input
UVLO Turn On
UVLO Turn Off
4
4
4
Continuous
Transient, 1 sec
Inhibited
No Load
Full Load , 20Hz to 10MHz
End-of-Life
5
15
-
-
-
-
-
0
9.0
12.0
11.0
28
-
4
45
35
-
-
11.0
-
-
5.0
5.0
-
5.0
5.0
-
-
-
-
35
2
20
5
25
370
78
-
-
-
450
-
776
50
80
6
65
60
90
1.5
13.0
14.8
14.5
5.05
5.075
5.10
5.20
5.25
5.275
15
10.5
2.1
60
20
200
50
200
500
-
8
8
500
500
-
-
15
-
-
-
-
-
0
9.0
12.0
11.0
11.88
11.82
11.66
11.80
11.52
11.36
0
0
0
-
-
-
-
-
-
78
-
-
-
350
100
-
28
-
4
45
45
-
-
11.0
-
-
12.0
12.0
-
12.0
12.0
-
-
-
-
30
2
20
5
20
400
84
-
-
-
450
-
776
50
80
6
65
90
110
1.5
13.0
14.8
14.5
12.12
12.18
12.30
12.20
12.48
12.6
20
14
1.17
50
20
200
50
200
500
-
8
8
500
500
-
-
V
V
mA
mA
mA
p-p
mA
p-p
V
V
V
V
V
V
V
V
V
V
W
W
A
mV
p-p
mV
mV
mV
mV
mV
%
W
W
F
kHz
MΩ
kHrs
Inhibit Pin Open Circuit Voltage
+V
OUT
+V
OUT
OUTPUT
5
Voltage
+V
OUT
-V
OUT
-V
OUT
-V
OUT
Power
3,6
T
CASE
= 25°C
T
CASE
= -55°C to +125°C
End-of-Life
T
CASE
= 25°C
T
CASE
= -55°C to +125°C
End-of-Life
Either Output
Either Output
Full Load , 20Hz to 10MHz
V
IN
= 16V to 40V
V
IN
= 16V to 40V
No Load to Full Load
No Load to Full Load
5
5,7
5
4.95
4.925
4.89
4.80
4.75
4.715
0
0
0
-
-
-
-
-
-
73
-
-
-
350
100
-
Total
±V
OUT
±V
OUT
±V
OUT
+V
OUT
-V
OUT
+V
OUT
-V
OUT
-V
OUT
Current
3,6
Ripple Voltage
Line Regulation
Load Regulation
Cross Regulation
EFFICIENCY
+V
OUT
= 70%, -V
OUT
= 30%
+V
OUT
= 30%, -V
OUT
= 70%
Full Load
Overload
5
4
LOAD FAULT POWER DISSIPATION
CAPACITIVE LOAD
ISOLATION
MTBF (MIL-HDBK-217F)
See notes next page.
4
Short Circuit
Either Output
500 V
DC
, T
CASE
= 25°C
SF @ T
C
= 55°C
SWITCHING FREQUENCY
SVHF2800D-2.0
2
SVHF2800D Series
SPECIFICATIONS
(T
CASE
= -55°C to +125°C, V
IN
= +28V ± 5%, Full Load
5
, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
Input Voltage (Transient, 1 second)
Output Power
1
Power Dissipation (Full Load, T
CASE
= +125°C)
50 V
DC
80 Volts
20 Watts
6 Watts
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight
(Maximum)
(Un-Flanged / Flanged)
SVHF2805D
Min
Typ
Max
Min
SVHF2812D
Typ
Max
+12°C
-65°C to +150°C
270°C
(24 / 28)
Grams
Parameter
Conditions
8
Units
DYNAMIC
Load Step Output Transient
Load Step Recovery
Line Step Recovery
Turn On Delay
Turn On Overshoot
2
4
±V
OUT
±V
OUT
±V
OUT
Half Load to Full Load
V
IN
= 16V to 40V
V
IN
= 0V to 28V
-
-
-
-
-
-
200
300
400
300
10
0
400
500
800
700
20
25
-
-
-
-
-
-
220
200
500
300
10
0
400
500
900
500
20
50
mV
PK
Sec
mV
PK
Sec
mSec
mV
PK
Line Step Output Transient
2, 4
Notes:
1. Dependant on output voltage.
2. Time for output voltage to settle within 1% of its nominal value.
3. Derate linearly to 0 at 135°C.
4. Verified by qualification testing.
5. Half load at +V
OUT
and half load at –V
OUT
.
6. Up to 70% of the total power or current can be drawn from any one of the two outputs.
7. 5% Load to Full Load at -55°C.
8. End-of-Life performance includes aging and radiation degradation and is within standard limits except where noted.
SVHF2800D-2.0
3
SVHF2800D Series
SPECIFICATIONS
(T
CASE
= -55°C to +125°C, V
IN
= +28V ± 5%, Full Load
5
, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
Input Voltage (Transient, 1 second)
Output Power
1
Power Dissipation (Full Load, T
CASE
= +125°C)
50 V
DC
80 Volts
20 Watts
6 Watts
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight
(Maximum)
(Un-Flanged / Flanged)
SVHF2815D
Min
Typ
Max
+12°C
-65°C to +150°C
270°C
(24 / 28)
Grams
Parameter
Conditions
8
Units
STATIC
INPUT
4
Voltage
Current
Ripple Current
Inhibit Pin Input
UVLO Turn On
UVLO Turn Off
4
4
4
Continuous
Transient, 1 sec
Inhibited
No Load
Full Load , 20Hz to 10MHz
End-of-Life
5
15
-
-
-
-
-
0
9.0
12.0
11.0
28
-
4
50
40
-
-
11.0
-
-
15.0
15.0
-
15.0
15.0
-
-
-
-
30
2
40
5
25
400
85
-
-
-
450
-
776
50
80
6
65
90
110
1.5
13.0
14.8
14.5
15.15
15.225
15.4
15.20
15.60
15.775
20
14
0.93
60
20
200
50
200
500
-
8
8
500
500
-
-
V
V
mA
mA
mA
p-p
mA
p-p
V
V
V
V
V
V
V
V
V
V
W
W
A
mV
p-p
mV
mV
mV
mV
mV
%
W
W
F
kHz
MΩ
kHrs
Inhibit Pin Open Circuit Voltage
+V
OUT
+V
OUT
OUTPUT
5
Voltage
+V
OUT
-V
OUT
-V
OUT
-V
OUT
Power
3,6
T
CASE
= 25°C
T
CASE
= -55°C to +125°C
End-of-Life
T
CASE
= 25°C
T
CASE
= -55°C to +125°C
End-of-Life
Either Output
Either Output
Full Load , 20Hz to 10MHz
V
IN
= 16V to 40V
V
IN
= 16V to 40V
No Load to Full Load
No Load to Full Load
5
5,7
5
14.85
14.775
14.565
14.80
14.40
14.19
-
-
-
-
-
-
-
-
-
79
-
-
-
350
100
-
Total
±V
OUT
±V
OUT
±V
OUT
+V
OUT
-V
OUT
+V
OUT
-V
OUT
-V
OUT
Current
3,6
Ripple Voltage
Line Regulation
Load Regulation
Cross Regulation
EFFICIENCY
+V
OUT
= 70%, -V
OUT
= 30%
+V
OUT
= 30%, -V
OUT
= 70%
Full Load
Overload
5
4
LOAD FAULT POWER DISSIPATION
CAPACITIVE LOAD
ISOLATION
MTBF (MIL-HDBK-217F)
See notes next page.
4
Short Circuit
Either Output
500 V
DC
, T
CASE
= 25°C
SF @ T
C
= 55°C
SWITCHING FREQUENCY
SVHF2800D-2.0
4
SVHF2800D Series
SPECIFICATIONS
(T
CASE
= -55°C to +125°C, V
IN
= +28V ± 5%, Full Load
5
, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
Input Voltage (Transient, 1 second)
Output Power
1
Power Dissipation (Full Load, T
CASE
= +125°C)
50 V
DC
80 Volts
20 Watts
6 Watts
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight
(Maximum)
(Un-Flanged / Flanged)
SVHF2815D
Min
Typ
Max
+12°C
-65°C to +150°C
270°C
(24 / 28)
Grams
Parameter
Conditions
8
Units
DYNAMIC
Load Step Output Transient
Load Step Recovery
Line Step Recovery
Turn On Delay
Turn On Overshoot
2
4
±V
OUT
±V
OUT
±V
OUT
Half Load to Full Load
V
IN
= 16V to 40V
V
IN
= 0V to 28V
-
-
-
-
-
-
200
100
500
300
10
0
400
500
900
500
20
50
mV
PK
Sec
mV
PK
Sec
mSec
mV
PK
Line Step Output Transient
2, 4
Notes:
1. Dependant on output voltage.
2. Time for output voltage to settle within 1% of its nominal value.
3. Derate linearly to 0 at 135°C.
4. Verified by qualification testing.
5. Half load at +V
OUT
and half load at –V
OUT
.
6. Up to 70% of the total power or current can be drawn from any one of the two outputs.
7. 5% Load to Full Load at -55°C.
8. End-of-Life performance includes aging and radiation degradation and is within standard limits except where noted.
SVHF2800D-2.0
5
51mcu
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