LS2803R3S/EM [INFINEON]
DC-DC Regulated Power Supply Module, 1 Output, 25W, Hybrid, HERMETIC SEALED, CERAMIC PACKAGE-8;型号: | LS2803R3S/EM |
厂家: | Infineon |
描述: | DC-DC Regulated Power Supply Module, 1 Output, 25W, Hybrid, HERMETIC SEALED, CERAMIC PACKAGE-8 CD |
文件: | 总15页 (文件大小:211K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
PD-96964
HIGH RELIABILITY
DC/DC CONVERTER
LS-SERIES
28V Input, Single/Dual Output
Description
The LS-Series of DC/DC converters are, high reliability
devices designed for hostile radiation hardened
environments. The LS-Series provide up to 30 watts
output power, small size, low weight, integrated EMI
filtering and a high tolerance to environmental stresses
such as radiation, temperature extremes, mechanical
shock, and vibration. All components are fully de-rated
to meet the requirements of MIL-STD-975. Extensive
documentation including, thermal analysis, stress
analysis and reliability predictions are available.
Features
n 18 to 40V DC Input Range
The LS-Series of converters incorporate a fixed
frequency single forward topology with magnetic
feedback and an internal EMI filter. These converters
are capable of meeting the conducted emissions
requirements of MIL-STD-461C without any additional
components. All models include an external inhibit port
and have an adjustable output voltage. They are
enclosed in a hermetic 1.5" x 2.3" x 0.425" steel package
and weigh less than 85 grams. The package utilizes
rugged ceramic feed-through copper core pins and is
sealed using parallel seam welding.
n Total Ionization Dose > 100K Rad(Si)
n SEE LET (Heavy Ions) > 82 MeV•cm2/mg
(SEU, SEL, SEGB, SEGR)
n Internal EMI filter; Converter Capable of
meeting MIL-STD-461C CE03
n Low Weight, < 85 grams
n Magnetically Coupled Feedback
n Up to 30W Output Power
n
Single and Dual Output Models Include
1.5, 2.5, 3.3, 5, 12, 15, ±5, ±12 and ±15V
n High Efficiency - to 83%
n 100MΩ @ 500VDC Isolation
n Under-Voltage Protection
n Short Circuit and Overload Protection
n Adjustable Output Voltage
n External Inhibit
The LS-Series of DC/DC converters provide same
mechanical outline, power ratings, for backward pin
compatibility, to their lower radiation tolerant counterpart
M3L and Military series ATS DC/DC converters. The
common platform design allows for similarity between
military and space system architectures. For higher
output power applications the HM, M3H and M3G-Series
of DC/DC converters are recommended.
n > 4,000,000 Hour MTBF (SF)
Applications
All converters are manufactured in a facility certified to
MIL-PRF-38534 Class (K). All processes used to
manufacture the converters have been qualified to
enable various levels of compliant devices. Full
environmental screening includes temperature cycling,
constant acceleration, fine and gross leak, PIND,
radiographics and burn-in.
n
n
n
n
n
Geo Synchronous Satellite
Low Earth Orbit
Deep Space Probe
Communication and Display Systems
Payload and Experiment LVPS
Non-flight (EM-suffix) versions of the LS-Series
converters are available for system development
purposes. These devices are manufactured with the
same generic active circuit elements but do not
haveguaranteed radiation performance. Variations in
electrical specifications and screening to meet custom
requirements can be accommodated.
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1
01/05/06
LS-SERIES
Circuit Description
The LS-Series converters utilize a single-ended
forward topology with resonant reset. The nominal
switching frequency is 500kHz. Electrical isolation
and tight output regulation are achieved through the
use of a magnetically coupled feedback. Voltage
feed-forward with duty factor limiting provides high
line rejection and protection against output over
voltage in the event of an internal control loop failure.
An external inhibit port is provided to control
converter operation. The converter’s operation is
inhibited when this pin is pulled low. It is intended
to be driven by an open collector logic device. The
pin may be left open for normal operation and has a
nominal open circuit voltage of 11V with respect to
the input return (pin 2).
The output voltage of all models can be adjusted
using a single external resistor.
An internal EMI filter allows the converter to meet
the conducted emissions requirements of MIL-STD-
461C on the input power leads.
Design Methodology
Output current is limited under any load fault
condition to approximately 125% of rated. An
overload condition causes the converter output
voltage to drop below nominal. The converter will
resume normal operation when the load current is
reduced below the current limit point. This protects
the converter from both overload and short circuit
conditions. The current limit point exhibits a slightly
negative temperature coefficient to reduce the
possibility of thermal runaway.
The LS-Series was developed using a proven
conservative design methodology derived from other
space level designs that includes selection of
established reliability components and fully de-
rating to the requirements of MIL-STD-975. A
magnetic feedback circuit is utilized instead of opto
-couplers to minimize temperature, aging and
radiation sensitivity. PSPICE was used extensively
to predict and optimize circuit performance for both
beginning and end-of-life. Thorough design
analyses include stress, thermal, and reliability
(MTBF).
2
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LS-SERIES
Absolute Maximum Ratings
Recommended Operating Conditions
Input voltage range
Output power
- -0.5Vdc to +60Vdc
Input voltage range1
Output power
- 18Vdc to +40Vdc
- 0 to Max. Rated
- Internally limited
Lead temperature
Operating temperature - -55°C to +125°C (Note 13)
- +300°C for 10 seconds
Operating temperature - -55°C to +85°C
Operating temperature2 - -55°C to +70°C
Storage temperature - -55°C to +135°C
1. Input voltage rating is BOL. Input voltage range reduced to
20 to 40VDC for EOL.
2. Meets de-rating per MIL-STD-975
Electrical Performance Characteristics
Conditions
Limits
°
≤
≤
°
-55 C TC +85 C
VIN = 28V DC ± 5%, CL = 0
unless otherwise specified
Parameter
Group A
Subgroup
Unit
V
Min
18
Nom
28
Max
40
Input Voltage
Output Voltage ( Vout )
LS2801R5S
LS2802R5S
LS2803R3S
LS2805S
1
1
1
1
1
1
1
1
1
IOUT = 100% rated load
Note 4
1.47
2.47
3.27
1.50
2.50
3.30
1.53
2.53
3.33
4.95
5.00
5.05
V
V
LS2812S
LS2815S
LS2805D
LS2812D
11.88
14.85
±4.95
±11.88
±14.85
12.00
15.00
±5.00
±12.00
±15.00
12.12
15.15
±5.05
±12.12
±15.15
LS2815D
LS2801R5S
LS2802R5S
LS2803R3S
LS2805S
LS2812S
LS2815S
LS2805D
LS2812D
LS2815D
2,3
2,3
2,3
2,3
2,3
2,3
2,3
2,3
2,3
IOUT = 100% rated load
Notes 4, 14
1.43
2.43
3.23
1.57
2.57
3.37
4.90
5.10
11.76
14.70
±4.90
±11.76
±14.70
12.24
15.30
±5.10
±12.24
±15.30
Output power ( POUT
)
LS2801R5S
LS2802R5S
LS2803R3S
All Others
VIN = 18, 28, 40 Volts, Note 2
VIN = 18, 28, 40 Volts, Note 2
0
0
0
0
12
20
25
30
1,2,3
1,2,3
W
A
Output current ( IOUT
)
LS2801R5S
LS2802R5S
LS2803R3S
LS2805S
LS2812S
LS2815S
LS2805D
LS2812D
LS2815D
0
0
0
0
0
0
0
0
0
8.0
8.0
7.57
6.0
2.5
2.0
4.8
2.3
1.6
Either Output, Note 3
Either Output, Note 3
Either Output, Note 3
Line regulation ( VRLINE
)
1,2,3
1,2,3
VIN = 18, 28, 40 Volts
IOUT = 0, 50%, 100% rated, Note 4
-0.5
0.5
%
%
%
Load regulation ( VRLOAD
LS2801R5S
)
VIN = 18, 28, 40 Volts
IOUT = 0, 50%, 100% rated, Note 4
-2.0
-1.2
-1.0
2.0
1.2
1.0
LS2802R5S
All others
Cross regulation ( VRCROSS
LS2805D
)
1,2,3
VIN = 18, 28, 40 Volts
Duals only, Note 5
-5.0
-3.0
-3.0
5.0
3.0
3.0
LS2812D
LS2815D
For Notes to Electrical Performance Characteristics, refer to page 5
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3
LS-SERIES
Electrical Performance Characteristics ( continued )
Conditions
Limits
Nom
Group A
Subgroup
-55°C ≤ TC ≤ +85°C
VIN = 28V DC ± 5%, CL = 0
unless otherwise specified
Parameter
Unit
mA
Min
Max
Input Current, no load ( IIN)
LS2801R5S
LS2802R5S
LS2803R3S
LS2805S
60
60
60
70
70
70
70
100
100
1,2,3
IOUT = 0, Pin 4 open
LS2812S
LS2815S
LS2805D
LS2812D
LS2815D
Pin 4 shorted to pin 2
Input current inhibited
1,2,3
1,2,3
8.0
mA
Output Ripple, ( VRIP
)
LS2801R5S
LS2802R5S
LS2803R3S
LS2805S
LS2812S
LS2815S
LS2805D
LS2812D
LS2815D
VIN = 18, 28, 40 Volts
IOUT = 100% rated load
Notes 4, 6
35
35
35
50
70
80
80
80
80
mV p-p
Switching frequency ( FS
)
1,2,3
1,2,3
425
500
575
KHz
%
Efficiency ( EFF
)
LS2801R5S
LS2802R5S
LS2803R3S
LS2805S
LS2812S
LS2815S
LS2805D
LS2812D
LS2815D
IOUT = 100% rated load
Note 4
61
68
72
78
78
78
79
79
79
64
72
76
82
82
82
83
83
83
Enable Input ( Inhibit Function )
open circuit voltage
drive current ( sink )
voltage range
Note 1
9.5
12
5.0
50
V
mA
V
-0.5
105
Current Limit Point
1,2,3
Vout = 90% of Nominal, Note 4
145
%
Expressed as a percentage
of full rated load current
Power dissipation, load fault (PD)
1,2,3
4,5,6
Short Circuit, Overload, Note 8
14
W
Output response to
Half Load to/from Full Load, Notes 4,9
-300
-300
300
mV pk
step load changes (VTLD
Recovery time,
)
4,5,6
Half Load to/from Full Load, Note
4,9,10
200
300
200
µs
step load changes (TTLD
)
Output response to
18V to/from 40V
IOUT = 100% rated load, Notes 1,4,11
mV pk
step line changes (VTLN
)
Recovery Time,
18V to/from 40V
IOUT = 100% rated load, Notes
1,4,10,11
µs
step line changes (TTLN
)
For Notes to Electrical Performance Characteristics, refer to page 5
4
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LS-SERIES
Electrical Performance Characteristics ( continued )
Conditions
-55°C ≤ TC ≤ +85°C
IN = 28V DC ± 5%, CL = 0
Limits
Nom
Group A
Subgroup
Parameter
Unit
Max
V
Min
unless otherwise specified
Turn-on Overshoot (VOS
LS2801R5S
LS2802R5S
LS2803R3S
LS2805S
)
4,5,6
10% Load, Full Load
Notes 4,12
150
250
330
500
1000
1000
500
LS2812S
LS2815S
LS2805D
mV
ms
LS2812D
LS2815D
Turn-on Delay (TDLY
1000
1000
10
)
0
Capacitive Load (CL)
LS2801R5S
LS2802R5S
LS2803R3S
LS2805S
IOUT = 100% rated load
No effect on DC performance
Notes 1, 4, 7
35
35
35
50
70
80
80
80
80
Nom
Max
50
LS2812S
LS2815S
LS2805D
LS2812D
µF
Each output on duals
LS2815D
IOUT = 100% rated load
Line Rejection
Isolation
1
1
35
dB
DC to 50KHz, Notes 1, 4
Input to Output or Any Pin to Case
except pin 3, test @ 500VDC
100
MΩ
Device Weight
MTBF
85
g
4.0 x 106
Hours
MIL-HDBK-217F2, SF, 35°C
Notes for Electrical Performance Characteristics Table
1. Parameter is tested as part of design characterization or after design changes. Thereafter, parameter shall
be guaranteed to the limits specified.
2. Parameter verified during line and load regulation tests.
3. Output load current must be distributed such that at least 20% of the total load current is being provided by
one of the outputs.
4. Load current split equally between outputs on dual output models.
5. Cross regulation is measured with 20% rated load on output under test while changing the load on the
other output from 20% to 80% of rated.
6. Guaranteed for a D.C. to 20MHz bandwidth. Tested using a 20KHz to 10MHz bandwidth using the circuit
on page 6.
7. Capacitive load may be any value from 0 to the maximum limit without compromising dc performance. For
a capacitive load in excess of the maximum limit, consult the factory.
8. Overload power dissipation is defined as the device power dissipation with the load set such that VOUT
=
90% of nominal.
9. Load step transition time ≤ 10 µSec.
10. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1% of
its steady state value.
11. Line step transition time ≤ 100 µSec.
12. Turn-on delay time from either a step application of input power or a logic low to a logic high transition on
the inhibit pin (pin 4) to the point where VOUT = 90% of nominal.
13. For operation at temperatures between +85°C and 125°C, de-rate the maximum output power linearly from
100% to 75%.
14. End of life (EOL) is ±3%
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5
LS-SERIES
Circuit for Measuring Output Ripple Voltage
1 µF
50 Ω
50 Ω Coax
Oscilliscope or equivalent
with 10 MHz bandwidth,
multiply readings by 2.
0.1 µF
+ Vout
Return
50 Ω
Termination
DUT
RL for IRATED
Radiation Performance Characterstics
Highest
Level
Test
Conditions
Min
Typ
Unit
Tested
MIL-STD-883, Method 1019
Operating bias applied during exposure,
Full Rated Load, VIN = 28V
Krads
(Si)
Total Ionizing Dose ( Gamma )
100
>82
Heavy ions (LET)
Operating bias applied during exposure,
Full Rated Load, VIN = 28V
Single Event Effects
SEU, SEL, SEGR, SEB
MeV-cm2
/mg
82
Screening and Process for LS-Series Converters
MIL-STD-883
Method
EM
Suffix
Non Suffix
Requirement
Temperature Range
-20°C to +85°C
-55°C to +125°C
MIL-PRF-38534, Class K Equivalent with
SEM
Element Evaluation
Internal Visual
Temperature Cycle
Constant Acceleration
Burn-in
2017
1010
Condition C
3 Kg, Y1Axis
2001
°
1015
48hrs @ 125 C
320 hrs @125°C
Final Electrical (Group A)
Seal, Fine & Gross
External Visual
MIL-PRF-38534
1014
25°C
In accordance with Device Specifications
Conditions A1, C1
2009
Non Destructive Bond Pull
2023
PIND
Radiographic
2020
Condition A
2012
* per Commercial Standards
6
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LS-SERIES
LS Series Output Voltage Adjustment
Output of LS series can be adjusted to be greater or less than the nominal output voltage with an external
resistor. However, the ranges of the output voltages are limited depending on the model as specified in
Table 1 and 2. An approximate value of the resistor can be determined using the following formula.
A - (B x Vout)
For Single Output Model: Radj =
(C x Vout) - D
A - (B x 2Vout)
For Dual Output Model: Radj =
(C x 2Vout) - D
Where:
Radj is the value of the external resistor in kilo-ohms, Rdown or Rup in Figure 1 or 2.
Power rating of the resistor shall be ≥ 0.125W. Metal film resistor with temperature coefficient
of ≤ ±50 ppm and tolerance of ≤ 1% is recommended. However, the final selection is dependent
on specific design requirements.
Vout is the desired output voltage in volts.
A, B, C, and D are unique constants depending on the model as shown in Table 1
for single output models and Table 2 for dual output models.
Table 1: Single Output Voltage Ranges and Constants
Output Voltage Range
Model
A
B
C
D
(V) (1)
1.500 to 1.600
1.400 to 1.500
2.500 to 2.750
2.250 to 2.500
3.300 to 3.630
2.970 to 3.300
5.000 to 5.500
4.500 to 5.000
12.000 to 13.200
10.800 to 12.000
15.000 to 16.500
13.500 to 15.000
69.65
56.85
32.39
40.47
13.04
21.19
9.25
8.75
7.14
3.52
2.88
2.50
2.04
2.27
1.85
2.27
1.85
2.27
1.85
13.13
10.72
8.81
LS2801R5S
LS2802R5S
LS2803R3S
LS2805S
48.42
39.52
7.19
43.48
8.25
35.48
16.18
20.00
29.31
19.98
53.31
19.98
63.61
6.73
119.48
97.52
11.36
9.27
295.22
241.01
370.61
302.55
27.24
22.24
34.05
27.80
LS2812S
LS2815S
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7
LS-SERIES
Table 2: Dual Output Voltage Ranges and Constants
Voltage Range of Each Output
Model
A
B
C
D
(±Vout) (1)
±5.000 to ±5.500
±4.500 to ±5.000
196.91
160.74
475.43
388.10
594.31
485.10
17.12
31.11
17.05
58.04
17.03
69.47
1.71
1.40
1.71
1.39
1.70
1.39
17.12
13.97
40.92
33.41
51.09
41.70
LS2805D
LS2812D
LS2815D
±12.000 to ±13.200
±10.800 to ±12.000
±15.000 to ±16.500
±13.500 to ±15.000
Note:
(1). Also the minimum and maximum adjustment limits of the output voltage.
Placement of Radj
An external resistor must be added in order to trim the output voltage of an LS converter. The placement
of an Radj resistor (Rdown or Rup) must be as shown in Figure 1 for single output models and as per
Figure 2 for dual output models. Please note that the connections are made to the specific pins. Rup is
placed across Out Return and Out Adj pins for output voltage greater than nominal output. Similar
connections apply for the dual output models.
8
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LS-SERIES
Figure 1: Radj Placement for Single Output Model
0
>=1
0
0
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9
LS-SERIES
Figure 2: Radj Placement for Dual Output Model
0
>=1
0
0
10
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LS-SERIES
LS2801R5S Typical Efficiency at 25°C
70
60
50
40
30
20
10
0
18V
28V
40V
0
10
20
30
40
50
60
70
80 90 100
% of Rated Load
LS2802R5S Typical Efficiency at 25°C
100
90
80
70
60
50
40
30
20
10
0
18V
28V
40V
0
10 20 30 40 50 60 70 80 90 100
%of Rated Load
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11
LS-SERIES
LS2803R3S Typical Efficiency at 25°C
90
80
70
60
50
40
30
20
10
0
18V
28V
40V
0
10
20
30
40
50
60
70
80
90 100
% of Rated Load
LS2805S Typical Efficiency at 25°C
100
90
80
70
60
50
40
30
20
10
0
18V
28V
40V
0
10
20
30
40
50
60
70
80
90 100
% of Rated Load
12
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LS-SERIES
LS2815S Typical Efficiency at 25°C
90
80
70
60
50
40
30
20
10
0
18V
28V
40V
0
10 20
30 40 50 60 70
80 90 100
% of Rated Load
LS2815D Typical Efficiency at 25°C
100
80
60
40
20
0
18V
28V
40V
0
10
20
30
40
50
60
70
80
90 100
%of Rated Load
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13
LS-SERIES
Block Diagram - Single Output
0
0
>=1
0
Block Diagram - Dual Output
0
0
>=1
0
14
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LS-SERIES
Mechanical Diagram
2.300
1.550
ø 0.128
4 Plcs
0.375
0.050
0.25 Typ.
0.270
0.470
0.400
0.400
1.000
Ref
1.500 1.750 2.000
0.400
0.200
2 Eq Spaces
@ 0.200
Pin ø
0.040
0.220
0.350
0.850
2.80
Ref
0.250
Tolerance: .XX = ±0.01
.XXX = ±0.005
0.425
Max
Pin Designation (Single/Dual)
Part Numbering
LS 2805 S /EM
Pin #
Single
+ Input
Dual
+ Input
Model
Quality Level:
1
2
3
4
5
6
7
8
Blank = Standard screening
EM = Prototype
Input Return
Case
Input Return
Case
Nominal
Input Voltage
28 = 28V
Number of Outputs
S = Single
Inhibit
Inhibit
Output Voltage
Output Adjust
Output Return
+ Out
Output Adjust
- Out
01R5 = 1.5V, 02R5 = 2.5V
03R3 = 3.3V, 05 = 5V
12 = 12V, 15 = 15V
D = Dual
Output Common
+ Out
N/C
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Data and specifications subject to change without notice. 01/2006
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15
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