SVHF2800S SERIES
SPACE QUALIFIED HYBRID DC-DC CONVERTERS
Models Available
Input: 15 V to 50 V continuous, 80 V transient
20 W, single output of 2.5 V, 3.3 V, 5 V, 5.2 V, 5.7 V, 12 V, 15 V
Qualified to MIL-PRF-38534 Class H and Class K
SVHF Series DC-DC Converter
1.0 DESCRIPTION
The SVHF 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 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,
Level P. Characterization is performed at both the component
level and at the SVHF Series hybrid converter level.
The SVHF 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/mg/cm
2
. 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 # 5962-11218
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: 2.00” x 1.130” x 0.355”
Max weight: 28 g
Industry standard pinout
Precision projection-welded hermetic metal case
Flanged and Non-flanged versions available
1.1 FEATURES
Up to 20 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
SVHF
20 W dual output DC-DC converter
SVRHF
15 W space qualified DC-DC converter, 100 krad(Si)
Custom versions available
EMI filters
Non-isolated, space qualified
point of load converters
Use with Thermal Pad
TP-002
Sales Information
Phone:(425) 353-3010
E-mail:
vptsales@vptpower.com
Fax: (425) 353-4030
Web:
www.vptpower.com
SVHF2800S - 9.0
Page 1
SVHF2800S Series
2.0 DIAGRAMS
2.1 BLOCK DIAGRAM
T1
28V IN
L1
C1
IN COM
Q1
MAGNETIC
FEEDBACK
VOLTAGE AND
CURRENT
AMPLIFIERS
C2
Rs2
OUT COM
D1
+V OUT
UNDER
VOLTAGE
SHUTDOWN
Rs1
PRIMARY
HOUSEKEEPING
SUPPLY
INH
PWM
CONTROL
SECONDARY
HOUSEKEEPING
SUPPLY
2.2 CONNECTION DIAGRAM
DVMH28 EMI FILTER
1
28VIN
28VOUT
2
SVHF2800S DC-DC CONVERTER
8
28VIN
+VOUT
4
LOAD
+
-
28 Vdc
1
INH
OUTCOM
3
5
INCOM
OUTCOM
3
4
7
INCOM
6
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
3A
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
SVHF2800S - 9.0
Page 2
SVHF2800S Series
3.2 PERFORMANCE SPECIFICATIONS
Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load, Unless Otherwise Specified
SVHF282R5S
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 = 16 V 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
1.
2.
3.
4.
57
-
500 V DC, Tcase = 25 °C
Non-flanged package option
Flanged package option
SF @ Tcase = 55 °C
350
100
-
-
-
-
2.463
64
-
450
-
-
-
776
-
-
-
1000
500
-
24
28
-
110
2.538
65
-
350
100
-
-
-
-
3.244
71
-
450
-
-
-
776
-
-
-
1000
500
-
24
28
-
110
3.35
%
µF
kHz
MΩ
g
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
-
-
-
-
-
-
140
400
400
300
10
0
250
600
700
500
20
15
-
-
-
-
-
-
160
350
400
300
10
0
400
500
700
500
20
15
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
2.475
2.463
0
0
-
-
-
-
-
2.5
2.5
-
-
10
2
20
-
-
2.525
2.538
8
3.2
40
20
50
8
8
3.267
3.25
0
0
-
-
-
-
-
3.3
3.3
-
-
10
2
20
-
-
3.333
3.35
10
3
40
20
50
8
8
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
65
80
14.8
14.5
15
-
-
-
-
12
11
28
-
4
45
25
-
-
50
80
6
65
80
14.8
14.5
V
V
mA
mA
mApp
V
V
Conditions
Min
Typ
Max
Min
SVHF283R3S
Typ
Max
Units
Tcase = -55 °C to +125 °C
Time for output voltage to settle within 1% of steady-state value.
Verified by initial electrical design verification. Post design verification, parameter shall be guaranteed to the limits specified.
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
SVHF2800S - 9.0
Page 3
SVHF2800S Series
3.2 PERFORMANCE SPECIFICATIONS (CONTINUED)
Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load, Unless Otherwise Specified
SVHF2805S
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 = 16 V 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
1.
2.
3.
4.
72
-
500 V DC, Tcase = 25 °C
Non-flanged package option
Flanged package option
SF @ Tcase = 55 °C
350
100
-
-
-
-
4.89
77
-
450
-
-
-
776
-
-
-
1000
500
-
24
28
-
110
5.1
72
-
350
100
-
-
-
-
5.09
77
-
450
-
-
-
427
-
-
-
1000
500
-
24
28
-
110
5.3
%
µF
kHz
MΩ
g
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
-
-
-
-
-
-
250
450
400
300
10
0
600
600
800
700
20
25
-
-
-
-
-
-
250
450
400
300
10
0
600
600
800
700
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
4.95
4.925
0
0
-
-
-
-
-
5
5
-
-
15
2
25
-
-
5.05
5.075
15
3
40
20
50
8
8
5.148
5.122
0
0
-
-
-
-
-
5.2
5.2
-
-
15
2
25
-
-
5.252
5.278
15
3
40
20
50
8
8
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
30
-
-
50
80
6
65
80
14.8
14.5
15
-
-
-
-
12
11
28
-
4
45
30
-
-
50
80
6
65
80
14.8
14.5
V
V
mA
mA
mApp
V
V
Conditions
Min
Typ
Max
Min
SVHF285R2S
Typ
Max
Units
Tcase = -55 °C to +125 °C
Time for output voltage to settle within 1% of steady-state value.
Verified by initial electrical design verification. Post design verification, parameter shall be guaranteed to the limits specified.
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
SVHF2800S - 9.0
Page 4
SVHF2800S Series
3.2 PERFORMANCE SPECIFICATIONS (CONTINUED)
Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load, Unless Otherwise Specified
SVHF285R7S
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 = 16 V 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
1.
2.
3.
4.
Output Inhibited
Output Enabled
0
9
72
-
500 V DC, Tcase = 25 °C
Non-flanged package option
Flanged package option
SF @ Tcase = 55 °C
350
100
-
-
-
-
5.557
-
11
77
-
450
-
-
-
427
-
-
1.5
13
-
1000
500
-
24
28
-
110
5.843
0
9
77
-
350
100
-
-
-
-
11.66
-
11
84
-
450
-
-
-
776
-
-
1.5
13
-
500
500
-
24
28
-
110
12.3
V
V
%
µF
kHz
MΩ
g
g
kHr
mApp
V
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
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
15
-
-
-
-
12
11
5.643
5.615
0
0
-
-
-
-
-
-
-
-
-
-
-
28
-
4
45
30
-
-
5.7
5.7
-
-
15
2
25
-
-
150
150
250
300
10
0
50
80
6
65
80
14.8
14.5
5.757
5.786
15
2.63
40
20
50
8
8
400
400
450
700
20
25
15
-
-
-
-
12
11
11.88
11.82
0
0
-
-
-
-
-
-
-
-
-
-
-
28
-
4
45
40
-
-
12
12
-
-
10
2
10
-
-
350
250
500
300
10
0
50
80
6
65
80
14.8
14.5
12.12
12.18
20
1.67
40
20
50
8
8
500
500
900
500
20
50
V
V
mA
mA
mApp
V
V
V
V
W
A
mVpp
mV
mV
W
W
mVpk
µs
mVpk
µs
ms
mVpk
Conditions
Min
Typ
Max
Min
SVHF2812S
Typ
Max
Units
Tcase = -55 °C to +125 °C
Time for output voltage to settle within 1% of steady-state value.
Verified by initial electrical design verification. Post design verification, parameter shall be guaranteed to the limits specified.
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
SVHF2800S - 9.0
Page 5
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