SVTR2800D SERIES
SPACE QUALIFIED HYBRID DC-DC CONVERTERS
Models Available
Input: 15 V to 50 V continuous, 80 V transient
40 W, dual outputs of ±5 V, ±8 V, ±12 V, ±15 V
Qualified to MIL-PRF-38534 Class H and Class K
SVTR Series DC-DC Converter
1.0 DESCRIPTION
The SVTR 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 SVTR 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 SVTR Series hybrid converter level.
The SVTR 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 # 5962-11223
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: 2.890” x 1.125” x 0.405”
Max weight: 55 g
Industry standard pinout
Precision seam-welded hermetic metal case
Flanged and Non-flanged versions available
1.1 FEATURES
•
•
•
•
•
•
•
•
Up to 40 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
•
•
•
•
•
•
SVTR
40 W single output DC-DC converter
SVRTR
40 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-003
Sales Information
Phone:(425) 353-3010
E-mail:
vptsales@vptpower.com
Fax: (425) 353-4030
Web:
www.vptpower.com
SVTR2800D - 7.0
Page 1
SVTR2800D Series
2.0 DIAGRAMS
2.1 BLOCK DIAGRAM
D2
+VOUT
C3
Rs3
OUTCOM
T1
D1
C2
L1
C1
-VOUT
INCOM
Q1
MAGNETIC
FEEDBACK
Rs1
VOLTAGE AND
CURRENT
AMPLIFIERS
Rs2
28VIN
UNDER
VOLTAGE
SHUTDOWN
PRIMARY
HOUSEKEEPING
SUPPLY
PWM
CONTROL
SECONDARY
HOUSEKEEPING
SUPPLY
INH
SYNC
2.2 CONNECTION DIAGRAM
DVMC28 EMI FILTER
1
28V IN
28V OUT
2
SVTR2800D DC-DC CONVERTER
1
3
28V IN
+V OUT
LOAD
SYNC
OUT COM
2
INH
LOAD
5
IN COM OUT COM
3
4
10
IN COM
-V OUT
6,7,8
5
4
9
28 Vdc
+
-
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
SVTR2800D - 7.0
Page 2
SVTR2800D Series
3.2 PERFORMANCE SPECIFICATIONS
Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load
1
, Unless Otherwise Specified
SVTR2805D
Parameter
INPUT
Voltage
Current
Ripple Current
Undervoltage Lockout
OUTPUT STATIC
Voltage
+Vout, Tcase = 25 °C
+Vout, Tcase = -55 °C to +125 °C
–Vout, Tcase = 25 °C
–Vout, Tcase = -55 °C to +125 °C
Total
Either Output
Current2,6
Ripple Voltage
Line Regulation
Load Regulation7
Cross Regulation, –Vout
Load Fault Power Dissipation
OUTPUT DYNAMIC
Load Step, Half to Full Load, Either
Output
Line Step4, Vin = 16 V to 40 V
Turn-On, Vin = 0 to 28 V
FUNCTION
INH Pin Input4
INH Pin Open Circuit Voltage4
SYNC Frequency Range
GENERAL
Efficiency
Capacitive Load4
Switching Frequency
Isolation
Weight
MTBF (MIL-HDBK-217F)
POST-RAD END-OF-LIFE LIMITS5
Input Ripple Current
Output Voltage
73
-
500 V DC, Tcase = 25 °C
Non-flanged package option
Flanged package option
SF @ Tcase = 55 °C
400
100
-
-
-
-
4.89
4.665
77
-
525
-
-
-
752
-
-
-
-
500
550
-
52
55
-
70
5.10
5.325
74
-
400
100
-
-
-
-
7.8
7.68
80
-
525
-
-
-
752
-
-
-
-
500
550
-
52
55
-
70
8.2
8.32
%
µF
kHz
MΩ
g
g
kHr
mApp
V
V
Output Inhibited
Output Enabled
0
9
500
-
11
-
1.5
13
600
0
9
500
-
11
-
1.5
13
600
V
V
kHz
Output Transient
Recovery3
Output Transient
Recovery3
Delay
Overshoot
-
-
-
-
-
-
100
100
300
300
10
0
400
350
600
500
20
25
-
-
-
-
-
-
100
50
200
250
10
0
400
300
550
500
20
25
mVpk
µs
mVpk
µs
ms
mVpk
Total
Either Output
20 Hz to 10 MHz
+Vout, V
IN
= 16 V to 40 V
–Vout, V
IN
= 16 V to 40 V
+Vout, No Load to Full Load
–Vout, No Load to Full Load
+Vout: 70% load, –Vout: 30% load
+Vout: 30% load, –Vout: 70% load
Overload4
Short Circuit
4.95
4.925
4.80
4.70
0
0
0
0
-
-
-
-
-
-
-
-
5
5
5
5
-
-
-
-
30
2
25
5
30
360
-
-
5.05
5.075
5.20
5.30
30
21
6.0
4.2
60
20
200
50
200
650
16
16
7.92
7.88
7.80
7.76
0
0
0
0
-
-
-
-
-
-
-
-
8.0
8.0
8.0
8.0
-
-
-
-
40
2
35
5
30
450
-
-
8.08
8.12
8.20
8.24
35
24.5
4.38
3.06
60
20
200
50
200
650
15
15
V
V
V
V
W
W
A
A
mVpp
mV
mV
mV
mV
mV
W
W
Continuous
Transient, 1 sec4
INH < 1.5 V
No Load
20 Hz to 10 MHz
Turn-On
Turn-Off4
15
-
-
-
-
12.0
11.0
28
-
4
60
30
-
-
50
80
6
90
50
14.8
14.5
15
-
-
-
-
12.0
11.0
28
-
4
60
30
-
-
50
80
6
90
50
14.8
14.5
V
V
mA
mA
mApp
V
V
Conditions
Min
Typ
Max
Min
SVTR2808D
Typ
Max
Units
Power2,6
+Vout, Tcase = -55 °C to +125 °C
–Vout, Tcase = -55 °C to +125 °C
1. Half load at +Vout and half load at –Vout
2. Up to 70% of the total power or current can be drawn from either of the
two outputs
3. Time for output voltage to settle within 1% of steady-state value
4. Verified by qualification testing
5. End-of-Life performance includes aging and radiation degradation and is within
standard limits except where noted
6. Derate linearly to 0 at 135 °C
7. 5% Load to Full Load at -55 °C
Sales Information
Phone:(425) 353-3010
E-mail:
vptsales@vptpower.com
Fax: (425) 353-4030
Web:
www.vptpower.com
SVTR2800D - 7.0
Page 3
SVTR2800D Series
3.2 PERFORMANCE SPECIFICATIONS (CONTINUED)
Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load
1
, Unless Otherwise Specified
SVTR2812D
Parameter
INPUT
Voltage
Current
Ripple Current
Undervoltage Lockout
OUTPUT STATIC
Voltage
+Vout, Tcase = 25 °C
+Vout, Tcase = -55 °C to +125 °C
–Vout, Tcase = 25 °C
–Vout, Tcase = -55 °C to +125 °C
Total
Either Output
Current2,6
Ripple Voltage
Line Regulation
Load Regulation7
Cross Regulation, –Vout
Load Fault Power Dissipation
OUTPUT DYNAMIC
Load Step, Half to Full Load, Either
Output
Line Step4, Vin = 16 V to 40 V
Turn-On, Vin = 0 to 28 V
FUNCTION
INH Pin Input4
INH Pin Open Circuit Voltage4
SYNC Frequency Range
GENERAL
Efficiency
Capacitive Load4
Switching Frequency
Isolation
Weight
MTBF (MIL-HDBK-217F)
POST-RAD END-OF-LIFE LIMITS5
Input Ripple Current
Output Voltage
78
-
500 V DC, Tcase = 25 °C
Non-flanged package option
Flanged package option
SF @ Tcase = 55 °C
400
100
-
-
-
-
11.66
11.48
83
-
525
-
-
-
752
-
-
-
-
500
550
-
52
55
-
70
12.30
12.48
78
-
400
100
-
-
-
-
14.565
14.415
84
-
525
-
-
-
752
-
-
-
-
500
550
-
52
55
-
70
15.40
15.55
%
µF
kHz
MΩ
g
g
kHr
mApp
V
V
Output Inhibited
Output Enabled
0
9
500
-
11
-
1.5
13
600
0
9
500
-
11
-
1.5
13
600
V
V
kHz
Output Transient
Recovery3
Output Transient
Recovery3
Delay
Overshoot
-
-
-
-
-
-
300
120
500
300
10
0
450
400
900
500
20
50
-
-
-
-
-
-
280
100
500
300
10
0
500
300
900
500
20
50
mVpk
µs
mVpk
µs
ms
mVpk
Total
Either Output
20 Hz to 10 MHz
+Vout, V
IN
= 16 V to 40 V
–Vout, V
IN
= 16 V to 40 V
+Vout, No Load to Full Load
–Vout, No Load to Full Load
+Vout: 70% load, –Vout: 30% load
+Vout: 30% load, –Vout: 70% load
Overload4
Short Circuit
11.88
11.82
11.80
11.64
0
0
0
0
-
-
-
-
-
-
-
-
12
12
12
12
-
-
-
-
25
2
25
2
20
430
-
-
12.12
12.18
12.20
12.36
40
28
3.33
2.33
50
20
200
50
200
650
14
14
14.85
14.70
14.70
14.55
0
0
0
0
-
-
-
-
-
-
-
-
15
15
15
15
-
-
-
-
25
2
65
2
35
420
-
-
15.15
15.30
15.30
15.45
40
28
2.67
1.87
50
20
200
50
200
650
14
14
V
V
V
V
W
W
A
A
mVpp
mV
mV
mV
mV
mV
W
W
Continuous
Transient, 1 sec4
INH < 1.5 V
No Load
20 Hz to 10 MHz
Turn-On
Turn-Off4
15
-
-
-
-
12.0
11.0
28
-
4
60
30
-
-
50
80
6
90
50
14.8
14.5
15
-
-
-
-
12.0
11.0
28
-
4
60
25
-
-
50
80
6
90
50
14.8
14.5
V
V
mA
mA
mApp
V
V
Conditions
Min
Typ
Max
Min
SVTR2815D
Typ
Max
Units
Power2,6
+Vout, Tcase = -55 °C to +125 °C
–Vout, Tcase = -55 °C to +125 °C
1. Half load at +Vout and half load at –Vout
2. Up to 70% of the total power or current can be drawn from either of the
two outputs
3. Time for output voltage to settle within 1% of steady-state value
4. Verified by qualification testing
5. End-of-Life performance includes aging and radiation degradation and is within
standard limits except where noted
6. Derate linearly to 0 at 135 °C
7. 5% Load to Full Load at -55 °C
Sales Information
Phone:(425) 353-3010
E-mail:
vptsales@vptpower.com
Fax: (425) 353-4030
Web:
www.vptpower.com
SVTR2800D - 7.0
Page 4
SVTR2800D Series
4.0 PERFORMANCE CURVES
4.1.1 SVTR2805D Efficiency (Typical, 25 °C)
80
76
72
68
64
15 V
60
56
0
10
Output Power (W)
20
30
28 V
50 V
4.1.2 SVTR2805D Cross-Regulation (Typical, 25 °C)
-4.2
-4.6
Efficiency (%)
-5.0
-Vout (V)
-5.4
-5.8
0.60 A
1.80 A
3.00 A
4.20 A
0
1
2
-Iout (A)
3
4
5
-6.2
-6.6
4.2.1 SVTR2808D Efficiency (Typical, 25 °C)
80
76
72
68
64
15 V
60
56
0
10
20
Output Power (W)
30
28 V
50 V
4.2.2 SVTR2808D Cross-Regulation (Typical, 25 °C)
-7.0
-7.5
Efficiency (%)
-8.0
-Vout (V)
-8.5
-9.0
0.44 A
1.31 A
2.19 A
3.06 A
0
0.5
1
1.5
2
-Iout (A)
2.5
3
3.5
-9.5
-10.0
Sales Information
Phone:(425) 353-3010
E-mail:
vptsales@vptpower.com
Fax: (425) 353-4030
Web:
www.vptpower.com
SVTR2800D - 7.0
Page 5
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