SVHF2812SFH [VPT]
SPACE QUALIFIED HYBRID DC-DC CONVERTERS;型号: | SVHF2812SFH |
厂家: | VPT, Inc. |
描述: | SPACE QUALIFIED HYBRID DC-DC CONVERTERS DC-DC转换器 |
文件: | 总17页 (文件大小:819K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
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
1.2 SPACE LEVEL CHARACTERIZATIONS
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
• Guaranteed TID performance to 30 krad(Si) including ELDRS
• SEE performance to 44 MeV/mg/cm2. Transients are fully
characterized for cross section and magnitude
• Worst-case analysis, stress, radiation, reliability reports available
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.
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
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.
1.4 PACKAGING
• Low-profile: 2.00” x 1.130” x 0.355”
• Max weight: 28 g
• Industry standard pinout
1.1 FEATURES
• Precision projection-welded hermetic metal case
• Flanged and Non-flanged versions available
• 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
1.5 SIMILAR PRODUCTS AND ACCESSORIES
• Very low output noise
• Radiation immune magnetic feedback circuit
• No use of optoisolators
• Undervoltage lockout
• Current limit protection / short circuit protection
• 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
Fax: (425) 353-4030
Web: www.vptpower.com
SVHF2800S - 8.0
Page 1
E-mail: vptsales@vptpower.com
SVHF2800S Series
2.0 DIAGRAMS
2.1 BLOCK DIAGRAM
D1
T1
28V IN
+V OUT
L1
C2
C1
Rs2
OUT COM
IN COM
Q1
VOLTAGE AND
CURRENT
AMPLIFIERS
MAGNETIC
FEEDBACK
UNDER
VOLTAGE
SHUTDOWN
Rs1
PRIMARY
HOUSEKEEPING
SUPPLY
PWM
CONTROL
SECONDARY
HOUSEKEEPING
SUPPLY
INH
2.2 CONNECTION DIAGRAM
DVMH28 EMI FILTER
28VIN 28VOUT
SVHF2800S DC-DC CONVERTER
1
2
4
8
4
28VIN
+VOUT
LOAD
1
3
+
-
28 Vdc
INH
OUTCOM
5
7
INCOM OUTCOM
3
INCOM
6
CASE
3.0 SPECIFICATIONS
3.1 ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings
Input Voltage (Continuous):
-0.5 V to 50 V
-0.5 V to 80 V
2
Operating Temperature (Full Load):
Storage Temperature:
-55 °C to +125 °C
-65 °C to +150 °C
270 °C
Input Voltage (Transient, 1 second):
ESD Rating per MIL-PRF-38534:
Lead Solder Temperature (10 seconds):
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
Web: www.vptpower.com
SVHF2800S - 8.0
Page 2
E-mail: vptsales@vptpower.com
SVHF2800S Series
3.2 PERFORMANCE SPECIFICATIONS
Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load, Unless Otherwise Specified
SVHF282R5S
SVHF283R3S
Parameter
INPUT
Conditions
Min
Typ
Max
Min
Typ
Max
Units
Voltage
Continuous
15
-
28
-
50
80
15
-
28
-
50
80
V
V
2
Transient, 1 sec
INH < 1.5 V
No Load
Current
-
-
4
45
25
-
6
65
-
-
4
45
25
-
6
65
mA
mA
mApp
V
Ripple Current
20 Hz to 10 MHz
Turn-On
-
80
-
80
Undervoltage Lockout
12
14.8
12
14.8
2
11
-
14.5
11
-
14.5
V
Turn-Off
OUTPUT STATIC
Voltage
Tcase = 25 °C
2.475
2.463
0
2.5
2.5
-
2.525
2.538
8
3.267
3.25
0
3.3
3.3
-
3.333
3.35
10
V
Tcase = -55 °C to +125 °C
V
4
W
Power
4
0
-
3.2
0
-
3
A
Current
Ripple Voltage
Line Regulation
Load Regulation
20 Hz to 10 MHz
-
-
-
10
2
40
20
50
-
-
-
10
2
40
20
50
mVpp
mV
Vin = 15 V to 50 V
No Load to Full Load
20
20
mV
2
Load Fault Power Dissipation
-
-
-
-
8
8
-
-
-
-
8
8
W
W
Overload
Short Circuit
OUTPUT DYNAMIC
Load Step, Half to Full Load
Output Transient
-
-
-
140
400
400
250
600
700
-
-
-
160
350
400
400
500
700
mVpk
µs
1
Recovery
2
Output Transient
mVpk
Line Step , Vin = 16 V to 40 V
1
-
-
-
300
10
0
500
20
-
-
-
300
10
0
500
20
µs
Recovery
Turn-On, Vin = 0 to 28 V
Delay
ms
Overshoot
15
15
mVpk
FUNCTION
2
Output Inhibited
Output Enabled
0
9
-
1.5
13
0
9
-
1.5
13
V
V
INH Pin Input
2
11
11
INH Pin Open Circuit Voltage
GENERAL
Efficiency
57
64
-
1000
500
-
65
71
-
1000
500
-
%
2
-
-
-
-
µF
kHz
MΩ
g
Capacitive Load
Switching Frequency
Isolation
350
450
350
450
500 V DC, Tcase = 25 °C
Non-flanged package option
Flanged package option
SF @ Tcase = 55 °C
100
-
100
-
Weight
-
-
-
-
-
24
28
-
-
-
-
-
-
24
28
-
g
MTBF (MIL-HDBK-217F)
776
776
kHr
3
POST-RAD END-OF-LIFE LIMITS
Input Ripple Current
-
-
-
110
-
-
-
110
mApp
V
Output Voltage
Tcase = -55 °C to +125 °C
2.463
2.538
3.244
3.35
1. Time for output voltage to settle within 1% of steady-state value.
2. Verified by initial electrical design verification. Post design verification, parameter shall
be guaranteed to the limits specified.
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
Fax: (425) 353-4030
Web: www.vptpower.com
SVHF2800S - 8.0
Page 3
E-mail: vptsales@vptpower.com
SVHF2800S Series
3.2 PERFORMANCE SPECIFICATIONS (CONTINUED)
Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load, Unless Otherwise Specified
SVHF2805S
SVHF285R2S
Parameter
INPUT
Conditions
Min
Typ
Max
Min
Typ
Max
Units
Voltage
Continuous
15
-
28
-
50
80
15
-
28
-
50
80
V
V
2
Transient, 1 sec
INH < 1.5 V
No Load
Current
-
-
4
45
30
-
6
65
-
-
4
45
30
-
6
65
mA
mA
mApp
V
Ripple Current
20 Hz to 10 MHz
Turn-On
-
80
-
80
Undervoltage Lockout
12
14.8
12
14.8
2
11
-
14.5
11
-
14.5
V
Turn-Off
OUTPUT STATIC
5.148
5.122
0
5.2
5.2
-
5.252
5.278
15
Voltage
Tcase = 25 °C
4.95
4.925
0
5
5
-
5.05
5.075
15
V
Tcase = -55 °C to +125 °C
V
4
W
Power
0
-
3
4
0
-
3
A
Current
-
-
-
-
15
2
40
20
50
8
Ripple Voltage
Line Regulation
Load Regulation
20 Hz to 10 MHz
-
-
-
15
2
40
20
50
mVpp
mV
Vin = 15 V to 50 V
No Load to Full Load
25
-
25
mV
2
Load Fault Power Dissipation
-
-
-
-
8
8
W
W
Overload
-
-
8
Short Circuit
OUTPUT DYNAMIC
-
-
250
450
600
600
Load Step, Half to Full Load
Output Transient
-
-
-
250
450
400
600
600
800
mVpk
µs
1
Recovery
-
-
400
300
800
700
2
Output Transient
mVpk
Line Step , Vin = 16 V to 40 V
1
-
-
-
300
10
0
700
20
µs
Recovery
-
-
10
0
20
25
Turn-On, Vin = 0 to 28 V
Delay
ms
Overshoot
25
mVpk
FUNCTION
0
9
-
1.5
13
2
Output Inhibited
Output Enabled
0
9
-
1.5
13
V
V
INH Pin Input
11
2
11
INH Pin Open Circuit Voltage
GENERAL
72
-
77
-
-
Efficiency
72
77
-
1000
500
-
%
1000
2
-
-
µF
kHz
MΩ
g
Capacitive Load
350
100
450
-
500
-
Switching Frequency
Isolation
350
450
500 V DC, Tcase = 25 °C
Non-flanged package option
Flanged package option
SF @ Tcase = 55 °C
100
-
Weight
-
-
-
-
-
24
28
-
-
-
-
-
-
24
28
-
g
427
MTBF (MIL-HDBK-217F)
776
kHr
3
POST-RAD END-OF-LIFE LIMITS
Input Ripple Current
-
-
-
110
5.1
-
-
-
110
5.3
mApp
V
Output Voltage
Tcase = -55 °C to +125 °C
4.89
5.09
1. Time for output voltage to settle within 1% of steady-state value.
2. Verified by initial electrical design verification. Post design verification,
parameter shall be guaranteed to the limits specified.
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
Fax: (425) 353-4030
Web: www.vptpower.com
SVHF2800S - 8.0
Page 4
E-mail: vptsales@vptpower.com
SVHF2800S Series
3.2 PERFORMANCE SPECIFICATIONS (CONTINUED)
Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load, Unless Otherwise Specified
SVHF285R7S
SVHF2812S
Parameter
INPUT
Conditions
Min
Typ
Max
Min
Typ
Max
Units
15
-
28
-
50
80
Voltage
Continuous
15
-
28
-
50
80
V
V
2
Transient, 1 sec
INH < 1.5 V
No Load
-
-
4
45
30
-
6
Current
-
-
4
45
40
-
6
65
mA
mA
mApp
V
65
-
80
Ripple Current
20 Hz to 10 MHz
Turn-On
-
80
12
11
14.8
14.5
Undervoltage Lockout
12
14.8
-
2
11
-
14.5
V
Turn-Off
OUTPUT STATIC
5.643
5.615
0
5.7
5.7
-
5.757
5.786
15
Voltage
Tcase = 25 °C
11.88
11.82
12
12
12.12
12.18
V
V
Tcase = -55 °C to +125 °C
4
0
-
20
W
Power
0
-
2.63
4
0
-
-
1.67
40
A
Current
-
-
-
-
15
2
40
20
50
8
Ripple Voltage
Line Regulation
Load Regulation
20 Hz to 10 MHz
10
2
mVpp
mV
mV
Vin = 15 V to 50 V
No Load to Full Load
-
20
25
-
-
10
50
2
Load Fault Power Dissipation
-
-
-
-
8
8
W
W
Overload
-
-
8
Short Circuit
OUTPUT DYNAMIC
-
-
150
150
400
400
Load Step, Half to Full Load
Output Transient
-
-
-
350
250
500
500
500
900
mVpk
µs
1
Recovery
-
-
250
300
450
700
2
Output Transient
mVpk
Line Step , Vin = 16 V to 40 V
1
-
-
-
300
10
0
500
20
µs
Recovery
-
-
10
0
20
25
Turn-On, Vin = 0 to 28 V
Delay
ms
Overshoot
50
mVpk
FUNCTION
0
9
-
1.5
13
2
Output Inhibited
Output Enabled
0
9
-
1.5
13
V
V
INH Pin Input
11
2
11
INH Pin Open Circuit Voltage
GENERAL
72
-
77
-
-
Efficiency
77
-
84
-
-
%
1000
2
500
µF
Capacitive Load
350
100
450
-
500
-
Switching Frequency
Isolation
350
450
500
-
kHz
MΩ
g
500 V DC, Tcase = 25 °C
Non-flanged package option
Flanged package option
SF @ Tcase = 55 °C
100
-
Weight
-
-
-
-
-
24
28
-
-
-
-
-
-
24
28
-
g
427
MTBF (MIL-HDBK-217F)
776
kHr
3
POST-RAD END-OF-LIFE LIMITS
Input Ripple Current
-
-
-
110
-
-
-
110
mApp
V
Output Voltage
Tcase = -55 °C to +125 °C
5.557
5.843
11.66
12.3
1. Time for output voltage to settle within 1% of steady-state value.
2. Verified by initial electrical design verification. Post design verification,
parameter shall be guaranteed to the limits specified.
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
Fax: (425) 353-4030
SVHF2800S - 8.0
Page 5
E-mail: vptsales@vptpower.com
Web: www.vptpower.com
SVHF2800S Series
SVHF2815S
Parameter
INPUT
Conditions
Min
Typ
Max
Units
Voltage
Continuous
15
-
28
-
50
80
V
2
V
Transient, 1 sec
INH < 1.5 V
No Load
Current
-
4
6
mA
mA
mApp
V
-
45
40
-
65
Ripple Current
20 Hz to 10 MHz
Turn-On
-
80
Undervoltage Lockout
12
11
14.8
14.5
2
-
V
Turn-Off
OUTPUT STATIC
Voltage
Tcase = 25 °C
14.85
14.775
0
15
15
-
15.15
15.225
20
V
Tcase = -55 °C to +125 °C
V
4
W
Power
4
0
-
-
10
2
1.34
40
20
50
8
A
Current
Ripple Voltage
20 Hz to 10 MHz
mVpp
mV
mV
W
Line Regulation
Vin = 15 V to 50 V
No Load to Full Load
-
Load Regulation
-
10
-
2
Load Fault Power Dissipation
-
Overload
Short Circuit
-
-
8
W
OUTPUT DYNAMIC
Load Step, Half to Full Load
Output Transient
-
-
350
250
500
500
mVpk
µs
1
Recovery
2
Output Transient
-
-
500
300
900
500
mVpk
µs
Line Step , Vin = 16 V to 40 V
1
Recovery
Turn-On, Vin = 0 to 28 V
Delay
-
-
10
0
20
50
ms
Overshoot
mVpk
FUNCTION
2
Output Inhibited
Output Enabled
0
9
-
1.5
13
V
V
INH Pin Input
2
11
INH Pin Open Circuit Voltage
GENERAL
Efficiency
78
-
85
-
-
%
2
500
µF
Capacitive Load
Switching Frequency
Isolation
350
450
500
-
kHz
MΩ
g
500 V DC, Tcase = 25 °C
Non-flanged package option
Flanged package option
SF @ Tcase = 55 °C
100
-
Weight
-
-
-
-
-
24
28
-
g
MTBF (MIL-HDBK-217F)
776
kHr
3
POST-RAD END-OF-LIFE LIMITS
Input Ripple Current
-
-
-
110
mApp
V
Output Voltage
Tcase = -55 °C to +125 °C
14.565
15.4
1. Time for output voltage to settle within 1% of steady-state value.
2. Verified by initial electrical design verification. Post design verification, parameter
shall be guaranteed to the limits specified.
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
Fax: (425) 353-4030
SVHF2800S - 8.0
Page 6
E-mail: vptsales@vptpower.com
Web: www.vptpower.com
SVHF2800S Series
4.0 PERFORMANCE CURVES
4.1.1 SVHF282R5S Efficiency (Typical, 25 °C)
4.1.2 SVHF283R3S Efficiency (Typical, 25 °C)
4.1.3 SVHF2805S Efficiency (Typical, 25 °C)
4.1.4 SVHF285R2S Efficiency (Typical, 25 °C)
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
Web: www.vptpower.com
SVHF2800S - 8.0
Page 7
E-mail: vptsales@vptpower.com
SVHF2800S Series
4.1.5 SVHF285R7S Efficiency (Typical, 25 °C)
4.1.6 SVHF2812S Efficiency (Typical, 25 °C)
4.1.7
SVHF2815S Efficiency (Typical, 25 °C)
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
SVHF2800S - 8.0
Page 8
E-mail: vptsales@vptpower.com
Web: www.vptpower.com
SVHF2800S Series
5.0 MECHANICAL OUTLINES AND PINOUT
Non-Flanged Package Option:
1. Tolerances are +0.005” unless otherwise stated
2. Case temperature is measured on the center of the baseplate surface
3. Materials: Case (Steel, gold over nickel plated); Cover (Steel, nickel plated); Pin (Copper-cored alloy 52, gold over nickel plated); Pin Seals (Glass)
Pin Function
Pin Function
Pin Function
1
2
3
INH
4
5
6
+VOUT
7
INCOM
NC
NC
8
28VIN
OUTCOM
CASE
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
SVHF2800S - 8.0
Page 9
E-mail: vptsales@vptpower.com
Web: www.vptpower.com
SVHF2800S Series
5.0 MECHANICAL OUTLINES AND PINOUT (CONTINUED)
Flanged Package Option:
1. Tolerances are +0.005” unless otherwise stated
2. Case temperature is measured on the center of the baseplate surface
3. Mounting holes are not threaded. Recommended fastener is # 4-40 screw
3. Materials: Case (Steel, gold over nickel plated); Cover (Steel, nickel plated); Pin (Copper-cored alloy 52, gold over nickel plated); Pin Seals (Glass)
Pin Function
Pin Function
Pin Function
1
2
3
INH
4
5
6
+VOUT
7
INCOM
NC
NC
8
28VIN
OUTCOM
CASE
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
SVHF2800S - 8.0
Page 10
E-mail: vptsales@vptpower.com
Web: www.vptpower.com
SVHF2800S Series
6.0 TECHNICAL NOTES
Please note that many of these
functions are also demonstrated
in detail on the VPT website in the form of technical video labs.
6.1 GENERAL INFORMATION
6.1.1 Topology Description
The SVHF2800S Series is an isolated single-output flyback converter. It operates over a wide input voltage range and provides a tightly
regulated positive output voltage with respect to the OUTCOM pin. Feedback isolation is accomplished using VPT’s proprietary
magnetic feedback technology. The converter regulates with zero load, and no minimum load is required.
6.1.2 External Components
The SVHF2800S Series is designed to operate stand-alone in most applications. It does not require any external components for
proper operation or to meet the datasheet specifications. Input and output L-C filters are provided internally for low ripple and noise. To
further reduce output ripple and noise, a small ceramic capacitor, 1 µF to 10 µF, can be added at the output. Most application specific
ripple requirements can be met with the addition of output capacitors alone. External output capacitance can be added up to the
maximum listed in Section 3.2.
6.1.3 Source Impedance
The impedance of the 28 V input source can interact with the DC-DC converter and can affect performance. High source impedance is
often caused by a long input cable or components added in series with the input. Source resistance will cause a DC voltage drop as the
converter draws DC input current. This voltage drop is simply the cable resistance multiplied by the input current at low line. The
voltage drop and the actual voltage at the input to the converter will determine the minimum source voltage at which the converter will
operate. A high source inductance can interact with the feedback control loop of the converter. VPT’s EMI filters will usually isolate the
source and eliminate this problem. In some cases, additional input capacitance will be needed to stabilize the system.
6.1.4 Output Configurations
Since the converter is isolated, the output can be configured as a positive or negative voltage. For example, the SVHF2812S can
provide +12 V DC referenced to OUTCOM or -12 V referenced to +VOUT.
The outputs of multiple converters can be stacked in series to provide higher voltages. When outputs of multiple modules are stacked,
they naturally share the load. For example, two SVHF2812S converters can be stacked to provide a 24 V output at 40 W.
6.2 FUNCTION DESCRIPTIONS
8
6.2.1 On/Off Control (Inhibit)
28VIN
The INH (Inhibit) pin is a primary-side control pin referenced to INCOM. The INH pin
must be driven using an open collector or open drain configuration. Pulling the INH
pin low disables the converter output, removes bias voltage from internal control
circuitry, and puts the converter in a state of minimum input current draw. Leaving
INH open enables the output, allowing the converter to operate normally. The pin
must be pulled below 1.5 V to disable the output. An optional capacitor from INH to
INCOM may be used to delay turn-on. The INH pin should be left open if not used.
10K
12V
INH
1
BIAS
OPTIONAL
CAPACITOR
INCOM
7
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SVHF2800S Series
6.3 PROTECTION FEATURES
6.3.1 Input Undervoltage Lockout
The SVHF2800S Series provides input undervoltage lockout protection. For input voltages below the turn-on voltage, the converter will
remain off, drawing minimal current from the source. When the input voltage exceeds the turn-on voltage, the converter will start. The
lockout circuit is designed to tolerate slow ramping input voltage waveforms. VPT’s proprietary magnetic feedback technology provides
bias voltage to all secondary control circuits and control amplifiers before the output starts, ensuring a well-controlled start up
sequence.
6.3.2 Output Soft Start
The SVHF2800S Series utilizes an output soft-start function to ramp the output in a controlled manner, eliminating output voltage
overshoot and limiting inrush current at turn on. A voltage-mode soft-start ensures the output waveform remains consistent regardless
of changes in the load current. The output rise time is approximately 8 ms. The soft-start function is active whether the module is turned
on with an application of input voltage or from release of the inhibit pin. Under normal conditions, current drawn from the source during
turn-on will not exceed the full-load input current. The turn-on delay time is specified from the application of input voltage (or release of
the inhibit pin) until the output reaches 90% of its final value.
6.3.3 Output Overcurrent Protection
The SVHF2800S Series provides output overcurrent and output short circuit protection. During a load fault condition, a constant output
current control circuit reduces the converter duty cycle to limit the output current to approximately 125% its rated value. The converter
will continue to provide constant current into any overload or short circuit condition. This feature allows the converter to start into any
capacitive load. Recovery is automatic and immediate upon removal of the fault condition. Sustained short circuit or overload operation
can cause excessive power dissipation. Care should be taken to control the operating temperature of the converter in this condition.
6.4 THERMAL CONSIDERATIONS
The SVHF2800S Series is rated for full power operation at 125 °C. Operation above 125 °C is allowed at reduced power. Specifically,
the output power should be derated linearly from full power at 125 °C to half power at 130 °C and to zero power at 135 °C. The
operating temperature of the converter is specified on the baseplate of the converter. The converter is designed to be conduction-
cooled, with the baseplate mounted to a heat sink, chassis, PCB or other thermal surface. The internal power dissipating components
are mounted to the baseplate of the converter and all heat flow is through the baseplate and mounting flanges. The lid of the converter
does not provide a good thermal path.
The hybrid DC-DC converter contains many semiconductor components. The maximum temperature rise from junction to case is
12 °C at full load.
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SVHF2800S Series
6.5 VPT RHA PLAN AND APPROACH
VPT takes a conservative approach to radiation testing to ensure product performance during space travel. VPT’s DLA approved
Radiation Hardness Assurance (RHA) plan documents VPT’s processes and procedures for guaranteeing the performance of VPT
products under various environmental conditions in space, including TID, SEE, and ELDRS.
Documents Available
Details
The radiation environments covered by this overview include: total ionizing dose (TID), which
includes enhanced low dose rate sensitivity (ELDRS); and single event effects (SEE).
DLA approved Radiation Hardness Assurance (RHA) Plan Summary
Worst-Case Analysis Report
Stress Report
Detailed worst-case analysis guarantees circuit performance post radiation and end of life.
Individual component stress analysis and deratings are included as part of the WCA report.
An overview report on the component level RLAT and characterization testing for TID and DD
as well as the hybrid level characterizations for TID and SEE response.
Radiation Test Summary Report
Reliability Report
MTBF report based on MIL-HDBK-217 reliability calculations.
Component temperature rise analysis and measurement results.
Thermal Analysis Report
Test Definition
VPT’s Approach
Total Ionizing Dose (TID). A measure of the energy absorbed in the
semiconductor components from the naturally occurring sources of
radiation (protons, electrons, photons). This results in the slow
degradation of semiconductor performance specifications. TID is tested
by exposing components to gamma radiation from a Cobalt-60 source.
Designed for 30 krad(Si). Sensitive semiconductor components undergo RLAT to 60 krad(Si)
per MIL-STD-883 Method 1019. Converters are characterized to 60 krad(Si).
Enhanced Low Dose Rate Sensitivity (ELDRS): Many linear-bipolar
integrated circuits show enhanced parameter degradation when exposed
at low dose rates close to those seen in a space environment as
compared to the high dose rates (50-300 rad(Si)/s) that components were
traditionally tested at for TID degradation. MIL-STD-883 Method 1019
gives guidance for characterizing components for ELDRS. Components
that exhibit ELDRS are tested for TID at a rate below 0.01 rad(Si)/s.
All bipolar linear ICs are characterized for ELDRS sensitivity and tested in accordance with
MIL-STD-883 test method 1019 section 3.13
Single Event Effects (SEE). Single high energy protons and heavy ions
can deposit sufficient energy in a semiconductor component, causing a
range of effects. SEEs include single event latchups (SELs), single event
gate ruptures (SEGRs), single event transients (SETs), single event
functional interrupts (SEFIs) and single event burnouts (SEBs).
Converters are characterized for catastrophic events (SEL, SEB, SEGR) as well as functional
interrupts (SEFI) under heavy ion exposure to LET = 44 MeV-cm2/mg. Converters are also
characterized for cross section and magnitude of output transients (SET) for at least 3
different LET levels.
Radiation Lot Acceptance Testing (RLAT): Semiconductor wafer lots are
exposed to TID on a sample basis. If the parameter degradation for the
tested samples is within the predetermined acceptance limits, then the lot
can be used in radiation hardened converters.
Sensitive semiconductor components undergo RLAT for TID.
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SVHF2800S Series
7.0 ENVIRONMENTAL SCREENING
100% tested per MIL-STD-883 as referenced to MIL-PRF-38534.
Contact sales for more information concerning additional environmental screening and testing options. VPT Inc. reserves the right to
ship higher screened or SMD products to meet orders for lower screening levels at our sole discretion unless specifically forbidden by
customer contract.
/EM
/H+
/K
(Engineering Model)
Non-QML1,6
MIL-STD-883 Test
Method, Condition
Test
(Class H + PIND)
(Class K)
Non-Destructive
Bond Pull
2
2
TM2023
●
●
●
●
●
TM2010, TM2017, TM2032
(MIL-STD-750, TM2072,
TM2073)
Internal Visual
●
●
TM1010, Condition C
-65 °C to 150 °C, Ambient
Temperature
Cycling
●
●
Constant
Acceleration
TM2001, 3000g, Y1
Direction
●
●
●
3
2
TM2020, Condition A
25 °C
PIND
●
Pre Burn-In
Electrical
TM1015, 320 hrs.,
125 °C, Case Typ
●
TM1015, 160 hrs.,
125 °C, Case Typ
Burn-In
●
●
24 hrs., 125 °C, Case Typ
●
●
MIL-PRF-38534, Group A
Subgroups 1-6
●
4
-55 °C, 25 °C, 125 °C
Final Electrical
MIL-PRF-38534, Group A
Subgroups 1 and 4
25 °C
TM1014, Fine Leak,
Condition A2 or B1
●
●
●
●
Hermeticity
(Seal)
TM1014, Gross Leak,
Condition C or B2
Gross Leak, Dip (1x10-3)
TM2012
●
●
5
●
●
Radiography
External Visual
TM2009
●
1. Non-QML products may not meet all requirements of MIL-PRF-38534
2. Not required per MIL-PRF-38534. Test performed for additional product quality
assurance
4. 100% R&R testing with all test data included in product shipment
5. Radiographic test Certificate of Compliance and film(s) or data CD included in
product shipment
3. PIND test Certificate of Compliance included in product shipment
6. Engineering models utilize only the screening specified and are not considered
compliant for flight use
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SVHF2800S Series
8.0 STANDARD MICROCIRCUIT DRAWING (SMD) NUMBERS
Standard Microcircuit SVHF2800S Series
Drawing Number Similar Part Number
Standard Microcircuit SVHF2800S Series
Drawing Number Similar Part Number
SVHF283R3S/H+
SVHF283R3S/H+-E
SVHF283R3SF/H+
SVHF283R3SF/H+-E
SVHF283R3S/K
SVHF283R3S/K-E
SVHF283R3SF/K
SVHF283R3SF/K-E
SVHF285R2S/H+
SVHF285R2S/H+-E
SVHF285R2SF/H+
SVHF285R2SF/H+-E
SVHF285R2S/K
SVHF285R2S/K-E
SVHF285R2SF/K
SVHF285R2SF/K-E
5962P1121801HXC
5962P1121801HXA
5962P1121801HYC
5962P1121801HYA
5962P1121801KXC
5962P1121801KXA
5962P1121801KYC
5962P1121801KYA
5962P1121806HXC
5962P1121806HXA
5962P1121806HYC
5962P1121806HYA
5962P1121806KXC
5962P1121806KXA
5962P1121806KYC
5962P1121806KYA
SVHF2805S/H+
SVHF2805S/H+-E
SVHF2805SF/H+
SVHF2805SF/H+-E
SVHF2805S/K
SVHF2805S/K-E
SVHF2805SF/K
SVHF2805SF/K-E
SVHF285R7S/H+
SVHF285R7S/H+-E
SVHF285R7SF/H+
SVHF285R7SF/H+-E
SVHF285R7S/K
SVHF285R7S/K-E
SVHF285R7SF/K
SVHF285R7SF/K-E
5962P1121802HXC
5962P1121802HXA
5962P1121802HYC
5962P1121802HYA
5962P1121802KXC
5962P1121802KXA
5962P1121802KYC
5962P1121802KYA
5962P1121807HXC
5962P1121807HXA
5962P1121807HYC
5962P1121807HYA
5962P1121807KXC
5962P1121807KXA
5962P1121807KYC
5962P1121807KYA
SVHF2812S/H+
SVHF2812S/H+-E
SVHF2812SF/H+
SVHF2812SF/H+-E
SVHF2812S/K
SVHF2812S/K-E
SVHF2812SF/K
SVHF2812SF/K-E
5962P1121803HXC
5962P1121803HXA
5962P1121803HYC
5962P1121803HYA
5962P1121803KXC
5962P1121803KXA
5962P1121803KYC
5962P1121803KYA
SVHF2815S/H+
SVHF2815S/H+-E
SVHF2815SF/H+
SVHF2815SF/H+-E
SVHF2815S/K
SVHF2815S/K-E
SVHF2815SF/K
SVHF2815SF/K-E
5962P1121804HXC
5962P1121804HXA
5962P1121804HYC
5962P1121804HYA
5962P1121804KXC
5962P1121804KXA
5962P1121804KYC
5962P1121804KYA
SVHF282R5S/H+
SVHF282R5S/H+-E
SVHF282R5SF/H+
SVHF282R5SF/H+-E
SVHF282R5S/K
SVHF282R5S/K-E
SVHF282R5SF/K
SVHF282R5SF/K-E
5962P1121805HXC
5962P1121805HXA
5962P1121805HYC
5962P1121805HYA
5962P1121805KXC
5962P1121805KXA
5962P1121805KYC
5962P1121805KYA
Do not use the SVHF2800S Series similar part number for SMD product acquisition. It is listed for reference only. For exact
specifications for the SMD product, refer to the SMD drawing. SMDs can be downloaded from the DLA Land and Maritime (Previously
known as DSCC) website at https://landandmaritimeapps.dla.mil/programs/defaultapps.asp. The SMD number listed above represents
the Federal Stock Class, Device Type, Device Class Designator, Case Outline, Lead Finish and RHA Designator (where applicable).
Please reference the SMD for other screening levels, lead finishes, and radiation levels. All SMD products are marked with a “Q” on the
cover as specified by the QML certification mark requirement of MIL-PRF-38534.
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SVHF2800S Series
9.0 ORDERING INFORMATION
SVHF
28
05
S
F
/K
-
XXX
1
2
3
4
5
6
7
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Product
Series
Nominal Input
Voltage
Output Voltage
Number of
Outputs
Package Option
Screening
Additional
Screening
Code
Code1,2,3
SVHF
28 28 Volts
2R5 2.5 Volts
3R3 3.3 Volts
05 5 Volts
S
Single
(None)
Non-Flanged
Flanged
/EM Engineering Model
/H+ Class H + PIND
/K Class K
Contact Sales
F
5R2 5.2 Volts
5R7 5.7 Volts
12 12 Volts
15 15 Volts
1
2
Contact the VPT Sales Department for availability of Class H (/H) or Class K (/K) qualified products
VPT Inc. reserves the right to ship higher screened or SMD products to meet lower screened orders at our sole discretion unless specifically forbidden by customer
contract
3
Engineering models utilize only the standard screening specified and are not considered compliant for flight use. These models are intended for low volume engineering
characterization only and have no guarantee regarding operation in a radiation environment. The customer must place the following statement on each line item of their
purchase order(s) for /EM units when ordering engineering models:
“(Customer Name) acknowledges that the /EM unit listed in this line item is not permitted for flight use and will be used for Engineering characterization only.”
Please contact your sales representative or the VPT Inc. Sales Department for more information concerning additional environmental
screening and testing, different input voltage, output voltage, power requirements, source inspection, and/or special element evaluation
for space or other higher quality applications.
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SVHF2800S Series
10.0 CONTACT INFORMATION
To request a quotation or place orders please contact your sales representative or the VPT, Inc. Sales Department at:
Phone:
Fax:
(425) 353-3010
(425) 353-4030
E-mail:
vptsales@vptpower.com
All information contained in this datasheet is believed to be accurate, however, no responsibility is assumed for possible errors or
omissions. The products or specifications contained herein are subject to change without notice.
11.0 ADDITIONAL INFORMATION
Visit the VPT website for additional technical resources, including:
Product Catalogs
Application Notes and White Papers
Technical Video Labs
Additional Products For Avionics/Military,
Hi-Rel COTS, and Space Applications
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