SVSA2800S SERIES
SPACE QUALIFIED HYBRID DC-DC CONVERTERS
Models Available
Input: 15 V to 50 V continuous, 80 V transient
6 W, single output of 3.3 V, 5 V, 5.2 V, 12 V, 15 V
Qualified to MIL-PRF-38534 Class H and Class K
SVSA Series DC-DC Converter
1.0 DESCRIPTION
The SVSA Series of space qualified DC-DC converters 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 SVSA 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,
Level P. Characterization is performed at both the component
level and at the SVSA Series hybrid converter level.
The SVSA Series of DC-DC converters is radiation tolerant and
suited for use in low Earth orbit (LEO), medium Earth orbit
(MEO), geostationary orbit (GEO), deep space, and launch
vehicle programs.
1.2 SPACE LEVEL CHARACTERIZATIONS
•
•
•
Guaranteed TID performance to 30 krad(Si) including ELDRS
SEE performance to 44 MeV-cm
2
/mg. Transients are fully
characterized for cross section and magnitude
Worst-case analysis, stress, radiation, reliability reports available
1.3 MANUFACTURING AND COMPLIANCE
•
•
•
•
•
•
Qualified to MIL-PRF-38534 Class H and Class K,
DLA SMD # 5962-11219
MIL-PRF-38534 element evaluated components
MIL-STD-461 C/D/E/F when used with appropriate VPT EMI filter
Manufactured in a MIL-PRF-38534 Class H and Class K facility
MIL-STD-883
ISO-9001
1.4 PACKAGING
•
•
•
•
Low-profile: 1.075” x 1.075” x 0.270”
Max weight: 15 g
Industry standard pinout
Precision projection-welded hermetic metal case
1.1 FEATURES
•
•
•
•
•
•
•
•
Up to 6 W output power
Wide input voltage range: 15 V to 50 V plus 80 V transient
Continuous operation over full military temperature range of
-55 °C to +125 °C with no power derating
Very low output noise
Radiation immune magnetic feedback circuit
No use of optoisolators
Undervoltage lockout
Current limit protection / short circuit protection
1.5 SIMILAR PRODUCTS AND ACCESSORIES
•
•
•
•
•
SVSA
6 W dual output DC-DC converter
Custom versions available
EMI filters
Non-isolated, space qualified
point of load converters
Use with Thermal Pad
TP-005
Sales Information
Phone:(425) 353-3010
E-mail:
vptsales@vptpower.com
Fax: (425) 353-4030
Web:
www.vptpower.com
SVSA2800S - 9.0
Page 1
SVSA2800S Series
2.0 DIAGRAMS
2.1 BLOCK DIAGRAM
28V IN
T1
L1
C1
IN COM
Q1
MAGNETIC
FEEDBACK
VOLTAGE AND
CURRENT
AMPLIFIERS
D1
+V OUT
C2
Rs2
OUT COM
UNDER
VOLTAGE
SHUTDOWN
Rs1
PRIMARY
HOUSEKEEPING
SUPPLY
INH
PWM
CONTROL
SECONDARY
HOUSEKEEPING
SUPPLY
2.2 CONNECTION DIAGRAM
DVMA28 EMI FILTER
1
28VIN
28VOUT
2
SVSA2800S DC-DC CONVERTER
6
28VIN
+VOUT
1
LOAD
+
-
28 Vdc
5
INH
OUTCOM
2
5
INCOM
OUTCOM
3
4
7
INCOM
8
CASE
3.0 SPECIFICATIONS
3.1 ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings
Input Voltage (Continuous):
Input Voltage (Transient, 1 second):
ESD Rating per MIL-PRF-38534:
-0.5 V to 50 V
-0.5 V to 80 V
3B
Operating Temperature (Full Load):
Storage Temperature:
Lead Solder Temperature (10 seconds):
-55 °C to +125 °C
-65 °C to +150 °C
270 °C
Sales Information
Phone:(425) 353-3010
E-mail:
vptsales@vptpower.com
Fax: (425) 353-4030
Web:
www.vptpower.com
SVSA2800S - 9.0
Page 2
SVSA2800S Series
3.2 PERFORMANCE SPECIFICATIONS
Parameter
INPUT
Voltage
Current
Ripple Current
Undervoltage Lockout
OUTPUT STATIC
Voltage
Power4
Current4
Ripple Voltage
Line Regulation
Load Regulation
Load Fault Power Dissipation
OUTPUT DYNAMIC
Load Step, Half to Full Load
Line Step2, Vin = 16V to 40 V
Turn-On, Vin = 0 to 28 V
FUNCTION
INH Pin Input2
INH Pin Open Circuit Voltage2
GENERAL
Efficiency
Capacitive Load2
Switching Frequency
Isolation
Weight
MTBF (MIL-HDBK-217F)
POST-RAD END-OF-LIFE LIMITS3
Input Ripple Current
Output Voltage
500 V DC, Tcase = 25 °C
Standard package option
SF @ Tcase = 55 °C
62
-
350
100
-
-
-
3.244
65
-
450
-
-
830
-
-
-
1000
500
-
15
-
100
3.35
65
-
350
100
-
-
-
4.89
68
-
450
-
-
830
-
-
-
1000
500
-
15
-
100
5.1
%
µF
kHz
MΩ
g
kHr
mApp
V
Output Inhibited
Output Enabled
0
9
-
11
1.5
13
0
9
-
11
1.5
13
V
V
Output Transient
Recovery1
Output Transient
Recovery1
Delay
Overshoot
-
-
-
-
-
-
200
450
250
600
10
0
300
700
500
1200
20
15
-
-
-
-
-
-
200
450
350
600
10
0
500
700
700
1200
20
25
mVpk
µs
mVpk
µs
ms
mVpk
20 Hz to 10 MHz
Vin = 15 V to 50 V
No Load to Full Load
Overload2
Short Circuit
Tcase = 25 °C
Tcase = -55 °C to +125 °C
3.267
3.25
0
0
-
-
-
-
-
3.3
3.3
-
-
-
-
-
-
-
3.333
3.35
4
1.21
30
15
50
3.3
3
4.95
4.925
0
0
-
-
-
-
-
5
5
-
-
-
-
-
-
-
5.05
5.075
5
1
30
15
50
3.3
3
V
V
W
A
mVpp
mV
mV
W
W
Continuous
Transient, 1 sec2
INH < 1.5 V
No Load
20 Hz to 10 MHz
Turn-On
Turn-Off2
15
-
-
-
-
12
11
28
-
4
45
25
-
-
50
80
6
60
50
14.8
14.5
15
-
-
-
-
12
11
28
-
4
45
30
-
-
50
80
6
60
50
14.8
14.5
V
V
mA
mA
mApp
V
V
Conditions
Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load, Unless Otherwise Specified
Min
SVSA283R3S
Typ
Max
Min
SVSA2805S
Typ
Max
Units
Tcase = -55 °C to +125 °C
1. Time for output voltage to settle within 1% of steady-state value
2. Verified by qualification testing
3. End-of-Life performance includes aging and radiation degradation and is within
standard limits except where noted
4. Derate linearly to 0 at 135 °C
Sales Information
Phone:(425) 353-3010
E-mail:
vptsales@vptpower.com
Fax: (425) 353-4030
Web:
www.vptpower.com
SVSA2800S - 9.0
Page 3
SVSA2800S Series
3.2 PERFORMANCE SPECIFICATIONS (CONTINUED)
Conditions
3
Continuous
Transient, 1 sec2
INH < 1.5 V
No Load
20 Hz to 10 MHz
Turn-On
Turn-Off2
Tcase = 25 °C
Tcase = -55 °C to +125 °C
Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load, Unless Otherwise Specified
SVSA285R2S
Min
15
-
-
-
-
12
11
5.148
5.122
0
0
20 Hz to 10 MHz
Vin = 15 V to 50 V
No Load to Full Load
Overload2
Short Circuit
-
-
-
-
-
-
-
-
-
-
-
0
9
65
-
500 V DC, Tcase = 25 °C
Standard package option
SF @ Tcase = 55 °C
350
100
-
-
-
5.08
Typ
28
-
4
45
30
-
-
5.2
5.2
-
-
10
2
15
-
-
200
450
350
600
10
0
-
11
68
-
450
-
-
830
-
-
Max
50
80
6
60
50
14.8
14.5
5.252
5.278
5.2
1
30
15
50
3.3
3
500
700
700
1200
20
25
1.5
13
-
1000
500
-
15
-
100
5.3
Min
15
-
-
-
-
12
11
11.88
11.82
0
0
-
-
-
-
-
-
-
-
-
-
-
0
9
71
-
350
100
-
-
-
11.66
SVSA2812S
Typ
28
-
4
45
30
-
-
12
12
-
-
10
2
5
-
-
300
200
700
200
10
0
-
11
76
-
450
-
-
830
-
-
Max
50
80
6
60
50
14.8
14.5
12.12
12.18
6
0.5
30
15
50
3
3
700
400
1200
600
20
50
1.5
13
-
500
500
-
15
-
100
12.3
Units
V
V
mA
mA
mApp
V
V
V
V
W
A
mVpp
mV
mV
W
W
mVpk
µs
mVpk
µs
ms
mVpk
V
V
%
µF
kHz
MΩ
g
kHr
mApp
V
Parameter
INPUT
Voltage
Current
Ripple Current
Undervoltage Lockout
OUTPUT STATIC
Voltage
Power4
Current4
Ripple Voltage
Line Regulation
Load Regulation
Load Fault Power Dissipation
OUTPUT DYNAMIC
Load Step, Half to Full Load
Line Step2, Vin = 16V to 40 V
Turn-On, Vin = 0 to 28 V
FUNCTION
INH Pin Input2
INH Pin Open Circuit Voltage2
GENERAL
Efficiency
Capacitive Load2
Switching Frequency
Isolation
Weight
MTBF (MIL-HDBK-217F)
POST-RAD END-OF-LIFE LIMITS3
Input Ripple Current
Output Voltage
Output Transient
Recovery1
Output Transient
Recovery1
Delay
Overshoot
Output Inhibited
Output Enabled
Tcase = -55 °C to +125 °C
1. Time for output voltage to settle within 1% of steady-state value
2. Verified by qualification testing
3. End-of-Life performance includes aging and radiation degradation and is within
standard limits except where noted
4. Derate linearly to 0 at 135 °C
Sales Information
Phone:(425) 353-3010
E-mail:
vptsales@vptpower.com
Fax: (425) 353-4030
Web:
www.vptpower.com
SVSA2800S - 9.0
Page 4
SVSA2800S Series
3.2 PERFORMANCE SPECIFICATIONS (CONTINUED)
Conditions
3
Continuous
Transient, 1 sec2
INH < 1.5 V
No Load
20 Hz to 10 MHz
Turn-On
Turn-Off2
Tcase = 25 °C
Tcase = -55 °C to +125 °C
Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load, Unless Otherwise Specified
SVSA2815S
Min
15
-
-
-
-
12
11
14.85
14.775
0
0
20 Hz to 10 MHz
Vin = 15 V to 50 V
No Load to Full Load
Overload2
Short Circuit
Output Transient
Recovery1
Output Transient
Recovery1
Delay
Overshoot
Output Inhibited
Output Enabled
-
-
-
-
-
-
-
-
-
-
-
0
9
72
-
500 V DC, Tcase = 25 °C
Standard package option
SF @ Tcase = 55 °C
350
100
-
-
-
14.565
Typ
28
-
4
45
30
-
-
15
15
-
-
10
2
5
-
-
300
200
700
200
10
0
-
11
78
-
450
-
-
830
-
-
Max
50
80
6
60
50
14.8
14.5
15.15
15.225
6
0.4
30
15
50
3
3
700
400
1300
600
20
50
1.5
13
-
500
500
-
15
-
100
15.4
Units
V
V
mA
mA
mApp
V
V
V
V
W
A
mVpp
mV
mV
W
W
mVpk
µs
mVpk
µs
ms
mVpk
V
V
%
µF
kHz
MΩ
g
kHr
mApp
V
Parameter
INPUT
Voltage
Current
Ripple Current
Undervoltage Lockout
OUTPUT STATIC
Voltage
Power4
Current4
Ripple Voltage
Line Regulation
Load Regulation
Load Fault Power Dissipation
OUTPUT DYNAMIC
Load Step, Half to Full Load
Line Step2, Vin = 16V to 40 V
Turn-On, Vin = 0 to 28 V
FUNCTION
INH Pin Input2
INH Pin Open Circuit Voltage2
GENERAL
Efficiency
Capacitive Load2
Switching Frequency
Isolation
Weight
MTBF (MIL-HDBK-217F)
POST-RAD END-OF-LIFE LIMITS3
Input Ripple Current
Output Voltage
Tcase = -55 °C to +125 °C
1.
2.
3.
4.
Time for output voltage to settle within 1% of steady-state value
Verified by qualification testing
End-of-Life performance includes aging and radiation degradation and is within standard limits except where noted
Derate linearly to 0 at 135°C
Sales Information
Phone:(425) 353-3010
E-mail:
vptsales@vptpower.com
Fax: (425) 353-4030
Web:
www.vptpower.com
SVSA2800S - 9.0
Page 5
Embedded System
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