SVFL2815DFH [VPT]
SPACE QUALIFIED HYBRID DC-DC CONVERTERS;型号: | SVFL2815DFH |
厂家: | VPT, Inc. |
描述: | SPACE QUALIFIED HYBRID DC-DC CONVERTERS DC-DC转换器 |
文件: | 总19页 (文件大小:884K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
SVFL2800D SERIES
SPACE QUALIFIED HYBRID DC-DC CONVERTERS
Models Available
Input: 16 V to 40 V continuous, 50 V transient
120 W, dual outputs of ±5 V, ±12 V, ±15 V
Qualified to MIL-PRF-38534 Class H and Class K
SVFL Series DC-DC Converter
1.0 DESCRIPTION
1.2 SPACE LEVEL CHARACTERIZATIONS
The SVFL 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 SVFL 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 SVFL Series hybrid converter level.
• Guaranteed TID performance to 30 krad(Si) including ELDRS
• SEE performance to 44 MeV-cm2/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 # 5962-11214
• 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 SVFL 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: 3.005” x 1.505” x 0.400”
• Max weight: 88 g
• Industry standard pinout
1.1 FEATURES
• Precision seam-welded hermetic metal case
• Standard and optional side-flanged versions available
• Up to 120 W output power
• Wide input voltage range: 16 V to 40 V plus 50 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
• SVFL 120 W single output DC-DC converter
• SVRFL 100 W dual space qualified DC-DC converter, 100 krad(Si)
• Custom versions available
• Parallel up to 5 units with current sharing
• Output voltage trim up +10% or down -20%
• Radiation immune magnetic feedback circuit
• No use of optoisolators
• EMI filters
• Non-isolated, space qualified point of load converters
• Use with Thermal Pad TP-001
• Undervoltage lockout
• Current limit protection / short circuit protection
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
Web: www.vptpower.com
SVFL2800D - 7.0
Page 1
E-mail: vptsales@vptpower.com
SVFL2800D Series
2.0 DIAGRAMS
2.1 BLOCK DIAGRAM
+VOUT
OUTCOM
28VIN
-VOUT
TRIM
INCOM
Q1
VOLTAGE AND
CURRENT
AMPLIFIERS
MAGNETIC
FEEDBACK
UNDER
VOLTAGE
SHUTDOWN
SHARE
INH2
PRIMARY
HOUSEKEEPING
SUPPLY
PWM
CONTROL
SECONDARY
HOUSEKEEPING
SUPPLY
INH1
SYNCIN
SYNCOUT
2.2 CONNECTION DIAGRAM
DVME28 EMI FILTER
SVFL2800D DC-DC CONVERTER
12
11
1
2
3
1
6
4
7
9
28VIN
28VIN
28VIN
28VOUT
28VOUT
28VOUT
28VIN
SYNCIN
INH1
+VOUT
- VOUT
10
9
12
8
+
28 Vdc
INH2
LOAD
4
5
6
-
INCOM OUTCOM
INCOM OUTCOM
INCOM OUTCOM
8
7
2
INCOM OUTCOM
CASE
3.0 SPECIFICATIONS
3.1 ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings
Input Voltage (Continuous):
-0.5 V to 40 V
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:
-0.5 V to 50 V
1C
Lead Solder Temperature (10 seconds):
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
Web: www.vptpower.com
SVFL2800D - 7.0
Page 2
E-mail: vptsales@vptpower.com
SVFL2800D Series
3.2 PERFORMANCE SPECIFICATIONS
Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load1, Unless Otherwise Specified
SVFL2805D
SVFL2812D
Parameter
INPUT
Conditions
Min
Typ
Max
Min
Typ
Max
Units
Voltage
Continuous
16
28
-
40
50
16
28
-
40
50
V
4
-
-
V
Transient, 1 sec
INH 1 < 1.5 V
INH 2 < 1 V
No Load
Current
-
1
3
-
1
3
mA
mA
mA
mApp
V
-
-
40
75
30
-
70
-
-
40
90
35
-
70
160
80
160
80
Ripple Current
20 Hz to 10 MHz
Turn-On
-
-
Undervoltage Lockout
14.5
13.5
16
14.5
13.5
16
4
-
15.5
-
15.5
V
Turn-Off
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
4.95
4.925
4.80
4.75
0
5
5
5
5
-
5.05
5.075
5.20
5.25
100
70
11.88
11.82
11.8
11.52
0
12
12
12
12
-
12.12
12.18
12.20
12.48
110
V
V
V
V
2,6
W
W
A
Power
Either Output
0
-
0
-
77
2,6
Total
0
-
20
0
-
9.17
Current
Either Output
0
-
-
14
80
0
-
-
6.4
80
A
Ripple Voltage
Line Regulation
20 Hz to 10 MHz
15
2
25
2
mVpp
mV
mV
+Vout, VIN = 16 V to 40 V
-Vout, VIN = 16 V to 40 V
-
20
-
20
-
10
200
-
10
200
7
+Vout, No Load to Full Load
-Vout, No Load to Full Load
-
-
10
55
100
200
-
-
2
120
200
mV
mV
Load Regulation
40
Cross Regulation, -Vout
+Vout: 30% load, -Vout: 70% load
+Vout: 70% load, -Vout: 30% load
-
260
450
-
220
450
mV
4
Load Fault Power Dissipation
-
-
-
-
50
50
-
-
-
-
50
50
W
W
Overload
Short Circuit
OUTPUT DYNAMIC
Load Step, Half to Full Load, Either Output
Output Transient
-
-
130
200
400
500
-
-
260
140
500
500
mVpk
µs
3
Recovery
4
Output Transient
-
300
600
-
600
1200
mVpk
Line Step , Vin = 16V to 40 V
3
-
-
-
300
5
500
20
-
-
-
300
5
500
20
µs
Recovery
Turn-On, Vin = 0 to 28 V
FUNCTION
Delay
ms
Overshoot
0
25
0
50
mVpk
4
Output Inhibited
Output Inhibited
Output Enabled
Output Enabled
0
0
-
-
-
1.5
1
0
0
-
-
-
1.5
1
V
V
V
INH 1 Pin Input
4
INH 2 Pin Input
4
10.5
15
10.5
15
INH 1 Pin Open Circuit Voltage
4
4
-20
2
-
-
-
-
12
10
4
4
-20
2
-
-
-
-
12
10
4
V
INH 2 Pin Open Circuit Voltage
Voltage Trim Range
%
4
V
SHARE Pin Voltage
SYNC Frequency Range
500
600
500
600
kHz
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
Fax: (425) 353-4030
SVFL2800D - 7.0
Page 3
E-mail: vptsales@vptpower.com
Web: www.vptpower.com
SVFL2800D Series
3.2 PERFORMANCE SPECIFICATIONS (CONTINUED)
Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load1, Unless Otherwise Specified
SVFL2805D
SVFL2812D
Parameter
GENERAL
Efficiency
Conditions
Min
Typ
Max
Min
Typ
Max
Units
73
79
-
500
600
-
79
85
-
500
600
-
%
4
-
425
100
-
-
525
-
-
425
100
-
-
525
-
µF
kHz
MΩ
g
Capacitive Load
Switching Frequency
Isolation
500 V DC, Tcase = 25 °C
Standard and optional side-flanged
SF @ Tcase = 55 °C
Weight
-
88
-
-
88
-
MTBF (MIL-HDBK-217F)
-
727
-
727
kHr
5
POST-RAD END-OF-LIFE LIMITS
Input Ripple Current
-
-
-
-
140
5.10
-
-
-
-
140
mApp
Output Voltage
+Vout, Tcase = -55 °C to +125 °C
-Vout, Tcase = -55 °C to +125 °C
4.89
4.715
11.66
11.36
12.28
12.58
V
V
5.275
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
Fax: (425) 353-4030
SVFL2800D - 7.0
Page 4
E-mail: vptsales@vptpower.com
Web: www.vptpower.com
SVFL2800D Series
3.2 PERFORMANCE SPECIFICATIONS (CONTINUED)
Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load1, Unless Otherwise Specified
SVFL2815D
Parameter
INPUT
Conditions
Min
Typ
Max
Units
Voltage
Continuous
16
28
40
V
4
-
-
1
50
3
V
Transient, 1 sec
INH 1 < 1.5 V
INH 2 < 1 V
No Load
Current
-
mA
mA
mA
mApp
V
-
40
110
40
-
70
160
80
16
-
-
Ripple Current
20 Hz to 10 MHz
Turn-On
Undervoltage Lockout
14.5
4
13.5
-
15.5
V
Turn-Off
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
14.85
14.775
14.80
14.40
0
15
15
15
15
-
15.15
15.225
15.20
15.60
120
V
V
V
V
W
2,6
Power
Either Output
Total
0
0
-
-
84
8
W
A
2,6
Current
Either Output
0
-
-
5.6
80
A
Ripple Voltage
Line Regulation
20 Hz to 10 MHz
30
2
mVpp
mV
mV
+Vout, VIN = 16 V to 40 V
-Vout, VIN = 16 V to 40 V
-
20
-
10
200
7
+Vout, No Load to Full Load
-Vout, No Load to Full Load
-
-
2
120
200
mV
mV
Load Regulation
30
Cross Regulation, -Vout
+Vout: 30% load, -Vout: 70% load
+Vout: 70% load, -Vout: 30% load
-
200
450
mV
4
Load Fault Power Dissipation
-
-
-
-
50
50
W
W
Overload
Short Circuit
OUTPUT DYNAMIC
Load Step, Half to Full Load, Either Output
Output Transient
-
-
260
110
500
500
mVpk
µs
3
Recovery
4
Output Transient
-
600
1200
mVpk
Line Step , Vin = 16V to 40 V
3
-
-
-
300
5
500
20
µs
Recovery
Turn-On, Vin = 0 to 28 V
FUNCTION
Delay
ms
Overshoot
0
50
mVpk
4
Output Inhibited
Output Inhibited
Output Enabled
Output Enabled
0
0
-
-
-
-
-
-
-
1.5
1
V
INH 1 Pin Input
4
V
INH 2 Pin Input
4
10.5
4
15
12
10
4
V
INH 1 Pin Open Circuit Voltage
4
V
INH 2 Pin Open Circuit Voltage
Voltage Trim Range
-20
2
%
V
4
SHARE Pin Voltage
SYNC Frequency Range
500
600
kHz
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
Fax: (425) 353-4030
SVFL2800D - 7.0
Page 5
E-mail: vptsales@vptpower.com
Web: www.vptpower.com
SVFL2800D Series
3.2 PERFORMANCE SPECIFICATIONS (CONTINUED)
Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load1, Unless Otherwise Specified
SVFL2815D
Parameter
GENERAL
Efficiency
Conditions
Min
Typ
Max
Units
80
85
-
500
600
-
%
4
-
425
100
-
-
525
-
µF
kHz
MΩ
g
Capacitive Load
Switching Frequency
Isolation
500 V DC, Tcase = 25 °C
Standard and optional side-flanged
SF @ Tcase = 55 °C
Weight
-
88
-
MTBF (MIL-HDBK-217F)
-
727
kHr
5
POST-RAD END-OF-LIFE LIMITS
Input Ripple Current
-
-
-
-
140
mApp
Output Voltage
+Vout, Tcase = -55 °C to +125 °C
-Vout, Tcase = -55 °C to +125 °C
14.565
14.19
15.355
15.73
V
V
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
Fax: (425) 353-4030
SVFL2800D - 7.0
Page 6
E-mail: vptsales@vptpower.com
Web: www.vptpower.com
SVFL2800D Series
4.0 PERFORMANCE CURVES
4.1.1 SVFL2805D Efficiency (Typical, 25 °C)
4.1.2 SVFL2812D Efficiency (Typical, 25 °C)
84
88
84
80
76
72
68
80
76
72
68
64
16 V
28 V
40 V
16 V
28 V
40 V
0
20
40
60
80
100
0
20
40
60
80
100
120
Output Power (W)
Output Power (W)
4.1.3 SVFL2815D Efficiency (Typical, 25 °C)
88
84
80
76
72
68
16 V
28 V
40 V
0
20
40
60
80
100
120
Output Power (W)
Sales Information
Phone:(425) 353-3010
E-mail: vptsales@vptpower.com
Fax: (425) 353-4030
Web: www.vptpower.com
SVFL2800D - 7.0
Page 7
SVFL2800D Series
4.0 PERFORMANCE CURVES (CONTINUED)
4.2.1 SVFL2805D Cross-Regulation (Typical, 25 °C)
4.2.2 SVFL2812D Cross-Regulation (Typical, 25 °C)
-4.2
-11.5
-12.0
-12.5
-13.0
-13.5
-14.0
-14.5
-15.0
-4.6
-5.0
-5.4
-5.8
2.00 A
0.92 A
2.75 A
4.58 A
6.42 A
6.00 A
-6.2
10.0 A
14.0 A
-6.6
0
2
4
6
8
10
12
14
0
1
2
3
4
5
6
7
-Iout (A)
-Iout (A)
4.2.3 SVFL2815D Cross-Regulation (Typical, 25 °C)
-14.0
-15.0
-16.0
-17.0
0.80 A
-18.0
-19.0
2.40 A
4.00 A
5.60 A
0
1
2
3
4
5
6
-Iout (A)
Sales Information
Phone:(425) 353-3010
E-mail: vptsales@vptpower.com
Fax: (425) 353-4030
Web: www.vptpower.com
SVFL2800D - 7.0
Page 8
SVFL2800D Series
5.0 MECHANICAL OUTLINES AND PINOUT
Standard Package:
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
4. Materials: Case (Steel, gold over nickel plated); Cover (Kovar, nickel plated); Pin (Copper-cored alloy 52, gold over nickel plated); Pin Seals (Glass)
Pin Function
Pin Function
Pin Function
Pin Function
1
2
3
28VIN
INCOM
CASE
4
5
6
INH1
7
8
9
+VOUT
OUTCOM
-VOUT
10
11
12
TRIM
SYNCOUT
SYNCIN
SHARE
INH2
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
Web: www.vptpower.com
SVFL2800D - 7.0
Page 9
E-mail: vptsales@vptpower.com
SVFL2800D Series
5.0 MECHANICAL OUTLINES AND PINOUT (CONTINUED)
Optional Side-Flanged Package:
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
4. Materials: Case (Steel, gold over nickel plated); Cover (Kovar, nickel plated); Pin (Copper-cored alloy 52, gold over nickel plated); Pin Seals (Glass)
Pin Function
Pin Function
Pin Function
Pin Function
1
2
3
28VIN
INCOM
CASE
4
5
6
INH1
7
8
9
+VOUT
OUTCOM
-VOUT
10
11
12
TRIM
SYNCOUT
SYNCIN
SHARE
INH2
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
Web: www.vptpower.com
SVFL2800D - 7.0
Page 10
E-mail: vptsales@vptpower.com
SVFL2800D 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 SVFL2800D Series is an isolated dual-output forward converter. It provides a positive and negative output voltage with respect to
the OUTCOM pin. Up to 70% of the total output power is available from either output. The internal voltage regulation loop actively
regulates the positive output using VPT’s proprietary magnetic feedback technology. The negative output is regulated by cross-
regulation. The negative output is well-regulated for balanced load conditions. For unbalanced load conditions, refer to the cross
regulation performance graphs in Section 4.2 for expected performance. For a balanced or near-balanced load condition, the converter
will regulate down to zero load, and no minimum load is required. For an unbalanced load condition, with negative loads greater than
10%, a minimum load of 10% is recommended on the positive output.
6.1.2 External Components
The SVFL2800D 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 outputs can be used as a traditional dual-output, with a positive and negative voltage referenced to
OUTCOM, or as a single-ended output referenced to –VOUT or +VOUT. For example, the SVFL2812D model can provide +12 V and
–12 V in the traditional dual output configuration, or can provide +24 V referenced to –VOUT, or –24 V referenced to +VOUT in single-
ended configuration. In the single-ended configuration, the OUTCOM pin will be at +12 V relative 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 SVFL2812D converters can be stacked to provide a 48 V output at 220 W.
6.2 FUNCTION DESCRIPTIONS
6.2.1 On/Off Control (INH1 and INH2)
The INH1 (Inhibit 1) pin is a primary-side control pin referenced
to IN COM. The INH1 pin must be driven using an open
collector or open drain configuration. Pulling the INH1 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 INH1 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 INH1 to
INCOM may be used to delay turn-on. The INH1 pin should be
left open if not used.
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
SVFL2800D - 7.0
Page 11
E-mail: vptsales@vptpower.com
Web: www.vptpower.com
SVFL2800D Series
The INH2 (Inhibit 2) pin is a secondary-side control pin referenced to OUTCOM. The INH2 pin must also be driven in an open collector
or open drain configuration. Pulling INH2 low to OUTCOM disables the converter output. Internal control circuits, however, remain
active. The pin must be pulled below 1.0 V to disable the output. The INH2 pin should be left open if not used.
7
+VOUT
6.2.2 Adjusting the Output Voltage (TRIM)
The output voltage set point of the converter can be adjusted using the TRIM pin.
To adjust the output up, connect the trim resistor from TRIM to OUTCOM. To
adjust the output down, connect the trim resistor from TRIM to +VOUT. The
maximum trim range is -20% and +10% from nominal. The appropriate resistor
values versus the output voltage are given in the table below. Because the TRIM
pin can be sensitive to external noise, the trim resistor should be physically
located close to the SVFL converter with short interconnects. The TRIM pin
should be left open if not used. When adjusting the output voltage, do not exceed
the rated total output power or output current.
Rtrim
10K
(TRIM DOWN)
10 TRIM
-
Rt
+
Rtrim
(TRIM UP)
Ri
+
-
2.5V
8
9
OUTCOM
-VOUT
SVFL2805D
SVFL2812D
SVFL2815D
+Vout (V)
Rtrim (Ω)
35.0k
47.5k
68.3k
110k
+ Vout (V)
Rtrim (Ω)
5.80k
10.0k
16.2k
26.6k
47.3k
109k
+ Vout (V)
16.50
16.25
16.00
15.75
15.50
15.25
15.00
14.75
14.50
14.25
14.00
13.75
13.50
13.25
13.00
12.75
12.50
12.25
12.00
Rtrim (Ω)
1.70k
5.00k
10.0k
18.3k
35.0k
85.0k
—
5.5
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
4.3
4.2
4.1
4.0
13.2
13.0
12.8
12.6
12.4
12.2
12.0
11.8
11.6
11.4
11.2
11.0
10.8
10.6
10.4
10.2
10.0
9.8
235k
—
225k
—
100k
454k
475k
58.3k
37.5k
25.0k
16.7k
10.7k
6.30k
2.80k
short
213k
225k
134k
142k
94.0k
70.1k
54.3k
42.9k
34.4k
27.8k
22.5k
18.2k
14.6k
100k
75.0k
58.3k
46.4k
37.5k
30.6k
25.0k
20.5k
16.7k
9.6
6.2.3 Frequency Synchronization (SYNCIN, SYNCOUT)
The SVFL2800D Series will free run at a switching frequency of approximately 525 kHz, which has been set for optimum converter
performance. Frequency synchronization is not necessary unless required by system constraints. The SVFL2800D Series provides a
frequency synchronization input (SYNCIN) and output (SYNCOUT), both referenced to INCOM.
The SYNCIN pin can be driven by an external clock or by the SYNCOUT pin of another SVFL converter. The internal clock and internal
power train will operate at the frequency applied to the SYNCIN pin. The SYNC IN pin should be driven with a TTL type 5 V square
wave signal. The duty cycle of the square wave should be between 20% and 80%. The SYNCIN pin is internally capacitively-coupled
and the internal load is equivalent to 220 pF. Proper layout and circuit techniques are necessary to prevent noise from being injected
into this pin. Synchronized converters should located physically close together and share a low impedance INCOM connection. The
SYNCIN pin can be left open or connected to INCOM if not used.
The SYNCOUT pin provides a 5 V quasi-square wave output at either the SYNCIN frequency or the free-running frequency if SYNCIN
is not used. The SYNCOUT of a SVFL can be connected to the SYNCIN pin of a second SVFL to synchronize its switching frequency
to that of the first SVFL. Similarly, the SYNCOUT of the second SVFL can be connected to SYNCIN of a third SVFL. Subsequent SVFL
converters can be connected in this daisy chain arrangement as shown in the figure. SYNCOUT should be left open if not used.
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
SVFL2800D - 7.0
Page 12
E-mail: vptsales@vptpower.com
Web: www.vptpower.com
SVFL2800D Series
6.2.4 Parallel Operation (SHARE)
The SVFL2800D Series provides a SHARE function for active current sharing among paralleled modules. For the dual output model,
the SHARE function is only applicable in the single-ended output configuration (see section 6.1.4) where no current is drawn from the
OUTCOM pin. To enable load sharing, connect a single wire between the SHARE pins of all parallel modules. The SHARE pin can be
noise sensitive. Paralleled converters should be located physically close to one another and share a low impedance OUTCOM
connection. A symmetrical layout of the output traces will improve share accuracy. Frequency synchronization is not required for
parallel operation. The SHARE pin should be left open if not used.
DVME28 EMI FILTER
SVFL2800D DC-DC CONVERTER
1
2
3
4
5
6
12
11
10
9
1
7
28VIN
28VIN
28VIN
28VOUT
28VOUT
28VOUT
28VIN
SYNCIN
INH1
+VOUT
SHARE
11
6
8
+
28 Vdc
OUTCOM
4
5
2
-
INCOM OUTCOM
INCOM OUTCOM
INCOM OUTCOM
8
SYNCOUT
INCOM
7
9
-VOUT
CASE
CASE
SVFL2800D DC-DC CONVERTER
1
7
28VIN
SYNCIN
INH1
+VOUT
SHARE
11
6
8
OUTCOM
4
5
2
SYNCOUT
INCOM
9
-VOUT
CASE
SVFL2800D DC-DC CONVERTER
1
6
4
7
28VIN
SYNCIN
INH1
+VOUT
SHARE
11
8
9
OUTCOM
2
INCOM
-VOUT
CASE
6.3 PROTECTION FEATURES
6.3.1 Input Undervoltage Lockout
The SVFL2800D 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.
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
SVFL2800D - 7.0
Page 13
E-mail: vptsales@vptpower.com
Web: www.vptpower.com
SVFL2800D Series
6.3.2 Output Soft Start
The SVFL2800D 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 4 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 SVFL2800D 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 total output current to approximately 125% its rated value. The
current limit protection circuit limits the sum of output currents in both +Vout and -Vout. It does not distinguish if the current is on the
positive or negative output. 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 SVFL2800D 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
15 °C at full load.
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
SVFL2800D - 7.0
Page 14
E-mail: vptsales@vptpower.com
Web: www.vptpower.com
SVFL2800D 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); displacement damage (DD); 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.
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
Web: www.vptpower.com
SVFL2800D - 7.0
Page 15
E-mail: vptsales@vptpower.com
SVFL2800D 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)
●
●
5
TM2012
●
●
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
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
Web: www.vptpower.com
SVFL2800D - 7.0
Page 16
E-mail: vptsales@vptpower.com
SVFL2800D Series
8.0 STANDARD MICROCIRCUIT DRAWING (SMD) NUMBERS
Standard Microcircuit SVFL2800D Series
Drawing Number Similar Part Number
SVFL2805D/H+
SVFL2805D/H+-E
SVFL2805DF/H+
SVFL2805DF/H+-E
SVFL2805D/K
SVFL2805D/K-E
SVFL2805DF/K
SVFL2805DF/K-E
5962P1121401HXC
5962P1121401HXA
5962P1121401HYC
5962P1121401HYA
5962P1121401KXC
5962P1121401KXA
5962P1121401KYC
5962P1121401KYA
SVFL2812D/H+
SVFL2812D/H+-E
SVFL2812DF/H+
SVFL2812DF/H+-E
SVFL2812D/K
SVFL2812D/K-E
SVFL2812DF/K
SVFL2812DF/K-E
5962P1121402HXC
5962P1121402HXA
5962P1121402HYC
5962P1121402HYA
5962P1121402KXC
5962P1121402KXA
5962P1121402KYC
5962P1121402KYA
SVFL2815D/H+
SVFL2815D/H+-E
SVFL2815DF/H+
SVFL2815DF/H+-E
SVFL2815D/K
SVFL2815D/K-E
SVFL2815DF/K
SVFL2815DF/K-E
5962P1121403HXC
5962P1121403HXA
5962P1121403HYC
5962P1121403HYA
5962P1121403KXC
5962P1121403KXA
5962P1121403KYC
5962P1121403KYA
Do not use the SVFL2800D 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.
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
SVFL2800D - 7.0
Page 17
E-mail: vptsales@vptpower.com
Web: www.vptpower.com
SVFL2800D Series
9.0 ORDERING INFORMATION
SVFL
28
05
D
F
/K
-
XXX
1
2
3
4
5
6
7
(1)
Product
Series
(2)
(3)
(4)
Number of
Outputs
(5)
(6)
(7)
Nominal Input
Voltage
Output Voltage
Package Option
Screening Code1,2,3
Additional
Screening
Code
SVFL
28 28 Volts
05 5 Volts
12 12 Volts
15 15 Volts
D
Dual
(None)
Standard
Side-
Flanged
/EM Engineering Model
/H+ Class H + PIND
/K Class K
Contact Sales
F
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.
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
SVFL2800D - 7.0
Page 18
E-mail: vptsales@vptpower.com
Web: www.vptpower.com
SVFL2800D 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
Sales Information
Phone:(425) 353-3010
Fax: (425) 353-4030
SVFL2800D - 7.0
Page 19
E-mail: vptsales@vptpower.com
Web: www.vptpower.com
相关型号:
©2020 ICPDF网 联系我们和版权申明