LSO2802R5S [INFINEON]
HYBRID-HIGH RELIABILITY RADIATION HARDENED DC-DC CONVERTER;
| 型号： | LSO2802R5S |
| 厂家： | 
Infineon |
| 描述： | HYBRID-HIGH RELIABILITY RADIATION HARDENED DC-DC CONVERTER DC-DC转换器 |
| 文件： | 总18页 (文件大小：516K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PD-97812
LSO SERIES
28V Input, Single/Dual Output
HYBRID-HIGH RELIABILITY
RADIATION HARDENED
DC-DC CONVERTER
Description
The LSO Series of DC-DC converters are, high reliability
devices designed for hostile radiation hardened
environments. The design is based on the heritage-rich
LS Series with enhanced functional performance and
an inclusion of an output overvoltage protection. The
LSO 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-1547, MIL-STD-975 and NASA EEE-INST-
002. Extensive documentation including, thermal
analysis, stress analysis and reliability predictions are
available.
LSO
Features
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18 to 40V DC Input Range
Total Ionization Dose > 100K Rad(Si)
SEE Hardened to LET (Heavy Ions) up to
82 MeV•cm2/mg (SEU, SEL, SEGB, SEGR)
Internal EMI filter; Converter Capable of
meeting MIL-STD-461C CE03
Derated per MIL-STD-1547, MIL-STD-975
and NASA EEE-INST-002
Magnetically Coupled Feedback
Up to 30W Output Power
Single and Dual Output Models Include
1.5, 1.8, 2.5, 3.3, 5, 12, 15, ±5, ±12 and ±15V
Remote Sense Compensation for Single
Output
Latch-off Output Overvoltage Protection
Input Current Telemetry
Input Undervoltage Lockout with Latching
Mode Options
High Efficiency - to 81%
20MΩ @ 100VDC Isolation
Undervoltage Protection
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The LSO 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. The converters
are overload, short circuit and output over-voltage
protected. They are enclosed in a hermetic 3.5" x 2.5" x
0.475" H steel package and weigh less than 125 grams.
The package utilizes rugged ceramic feed-through
copper core pins and is sealed using parallel seam
welding.
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Short Circuit and Overload Protection
Adjustable Output Voltage
Adjustable External OVP-115% to 125%
External Inhibit
Low Weight, < 125 grams
4000000 Hour MTBF (SF)
Manufactured in a facility fully qualified to MIL-PRF-
38534, these converters are fabricated utilizing DLA
qualified processes. For available screening options,
refer to device screening table in the data sheet.
Variations in electrical specifications and screening to
meet custom requirements can be accommodated.
Applications
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Geo Synchronous Satellite
Low Earth Orbit
Deep Space Probe
Communication and Display Systems
Payload and Experiment LVPS
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1
08/27/13
LSO SERIES
28V Input, Single/Dual Output
Circuit Description
The LSO 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.
To take advantage of the latch-up feature, the U/V
Latch Pin (Pin 5) should be shorted (with less than
100 ohms) to the Inhibit Return Pin (Pin 4). Note that
in this mode the converter will latch off if an
undervoltage condition lasts more than 1milli-sec.
The converter is reset by a shorted Enable Input pin
command followed by an open Enable Input pin
command.
An internal EMI filter allows the converter to meet
the conducted emissions requirements of MIL-STD-
461C on the input power leads.
Output Overvoltage Protection: The converter
also features an output over-voltage protection.
One OVP circuitry for each output for the dual output
models. In an event the voltage output exceeds a
preset voltage threshold of approximately 120 +/-
5% of nominal voltage output, the converter will
turn off. The input power to the converter or the
signal at the Inhibit pin must be recycled (connecting
and removing the Inhibit pin to/from Inhibit Return
pin) to turn on the converter. This event is possible
only if the converter shuts off due to a false triggering.
The OVP threshold voltage can also be reset to
within 115% to 125% of nominal output voltage
with two external resistors. Refer to the Application
Notes section of the data sheet on page 9.
Functional Notes
Input Current Telemetry: The LSO Series single
and dual output models also feature an input current
telemetry with a magnitude of 0 to 3.3V full scale.
The voltage signal at this pin (Pin 7) with respect to
Output Return (Pin 12) is equal to 1.5 times the input
current (Vin TLM (V) =1.5 *Input Current (A)+/-0.1V)
Short Circuit and Overload Protection: 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.
Inhibit (On/Off Command) : 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 4V with respect to the inhibit return (Pin 4).
Input Undervoltage Lockout (UVLO) and
Undervoltage Release (UVR): The converter is
designed to be protected against an undervoltage
condition. The converter will be in a non-functional
(UVLO) mode when the input voltage is pproximately
15.5V or less. The converter will turn on when the
input voltage rises to 15.5V to 17.9V (defined as
UVR threshold) and will provide a regulated output
as the input voltage reaches 18V.
Output Voltage Adjustment: The output voltage
of all models can be adjusted greater or less than
the nominal output voltage using a single external
resistor. Refer to the Application Notes section of
the data sheet on page 9.
Should the input voltage drops below 16.5V to 14.5V
(defined as UVLO threshold), the converter will turn
off and remains off so long as the input voltage
remains under the UVLO threshold. The converter
will resume a normal operation when the input line
rises above the UVR threshold. However, the
converter can be configured to remain in a latch-up
mode if desired.
2
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LSO SERIES
28V Input, Single/Dual Output
Design Methodology
The LSO Series was developed using a proven
conservative design methodology derived from other
space level designs that includes selection of
established reliability components and fully derating
to the requirements of MIL-STD-1547, MIL-PRF-975
and NASA EEE-INST-002 except for the CDR type
ceramic capacitors, a capacitor with 50V rating is
used for in-circuit voltage stress of less than 10V. 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).
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3
LSO SERIES
28V Input, Single/Dual Output
Absolute Maximum Ratings
Recommended Operating Conditions
Input voltage range1
Output power
Input voltage range
-0.5Vdc to +60Vdc
+18Vdc to +40Vdc
Output power
Internally limited
0 to Max. Rated
-55°C to +85°C
-55°C to +70°C
Lead temperature
+300°C for 10 seconds
Operating case temperature
Operating case temperature -55°C to +125°C (Note 13) Operating case temperature
Storage temperature -55°C to +135°C
1. Meets MIL-STD-1547, MIL-STD-975 and NASA EEE-INST-002
up to the input voltage at 38.6V.
Electrical Performance Characteristics
Conditions
-55°C ≤ T ≤ +85°C
Limits
C
Parameter
Group A
Subgroup
V
= 28V DC ± 5%, C = 0
IN
L
Unit
V
Min
18
Nom
28
Max
40
unless otherwise specified
Input Voltage
Output Voltage ( V
)
OUT
1
1
1
1
1
1
1
1
1
1
1.47
1.77
2.47
3.27
4.95
11.88
14.85
±4.95
±11.88
±14.85
1.50
1.80
2.50
3.30
5.00
12.00
15.00
±5.00
±12.00
±15.00
1.53
1.83
2.53
I
= 100% rated load
Note 4
LSO2801R5S
LSO2801R8S
LSO2802R5S
LSO2803R3S
LSO2805S
LSO2812S
LSO2815S
LSO2805D
LSO2812D
LSO2815D
OUT
3.33
V
5.05
12.12
15.15
±5.05
±12.12
±15.15
2,3
2,3
2,3
2,3
2,3
2,3
2,3
2,3
2,3
2,3
1.43
1.73
2.43
3.23
4.90
11.76
14.70
±4.90
±11.76
±14.70
1.57
1.87
2.57
3.37
5.10
12.24
15.30
±5.10
±12.24
±15.30
LSO2801R5S
LSO2801R8S
LSO2802R5S
LSO2803R3S
LSO2805S
LSO2812S
LSO2815S
LSO2805D
LSO2812D
LSO2815D
IOUT = 100% rated load
Notes 4, 13
V
Output power ( P
)
OUT
0
0
0
0
0
12
14.4
20
25
30
V
V
= 18, 28, 40 Volts, Note 2
LSO2801R5S
LSO2801R8S
LSO2802R5S
LSO2803R3S
All Others
IN
1,2,3
1,2,3
W
Output current ( I
)
OUT
0
0
0
0
0
0
0
0
0
0
8.0
8.0
8.0
7.57
6.0
2.5
2.0
4.8
2.3
1.6
= 18, 28, 40 Volts, Note 2
LSO2801R5S
LSO2801R8S
LSO2802R5S
LSO2803R3S
LSO2805S
LSO2812S
LSO2815S
LSO2805D
LSO2812D
LSO2815D
IN
A
Either Output, Note 3
Either Output, Note 3
Either Output, Note 3
For Notes to Electrical Performance Characteristics, refer to page 7
4
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LSO SERIES
28V Input, Single/Dual Output
Electrical Performance Characteristics (continued)
Conditions
-55°C ≤ T ≤ +85°C
C
= 28V DC ± 5%, C = 0
Limits
Nom
Group A
Subgroup
Parameter
Unit
V
IN
L
Min
Max
unless otherwise specified
Line regulation ( VR
)
V
IN
= 18, 28, 40 Volts
LINE
-0.5
-1.0
0.5
1.0
%
%
1,2,3
1,2,3
I
I
= 0, 50%, 100% rated, Note 4
All Single and Dual Output Models
OUT
OUT
Load regulation ( VR
)
V
IN
= 18, 28, 40 Volts
LOAD
All Single Output Models
= 0, 50%, 100% rated, Note 4
V
IN
= 18 to 40 Volts
Min load to full load
Dual model is measured
from +Output to –Output, Note 13
Total regulation ( Line and Load )
1,2,3
1,2,3
-1.0
1.0
%
%
Cross regulation (VR
)
CROSS
-5.0
-3.0
-3.0
5.0
3.0
3.0
V
= 18, 28, 40 Volts
LSO2805D
LSO2812D
LSO2815D
IN
Duals only, Note 5
Input Current, no load (I
LSO2801R5S
LSO2801R8S
LSO2802R5S
LSO2803R3S
LSO2805S
)
IN
60
60
60
60
70
70
70
70
100
100
1,2,3
I
= 0, Pin 3 open
OUT
mA
LSO2812S
LSO2815S
LSO2805D
LSO2812D
LSO2815D
Input current inhibited
1,2,3
1,2,3
Pin 4 shorted to Pin 3
8.0
mA
Output Ripple (V
)
RIP
35
35
35
35
50
70
50
50
50
50
V
IN
= 18, 28, 40 Volts
LSO2801R5S
LSO2801R8S
LSO2802R5S
LSO2803R3S
LSO2805S
LSO2812S
LSO2815S
LSO2805D
LSO2812D
LSO2815D
I
= 100% rated load
Notes 4, 6
OUT
mV p-p
1,2,3
1,2,3
425
500
575
KHz
Switching frequency (F
)
S
Efficiency (E
)
FF
60
63
67
71
77
77
77
76
78
78
62
65
69
73
80
80
80
79
81
81
LSO2801R5S
LSO2801R8S
LSO2802R5S
LSO2803R3S
LSO2805S
LSO2812S
LSO2815S
LSO2805D
LSO2812D
LSO2815D
I
= 100% rated load
Note 4
OUT
%
Input undervoltage lockout (UVLO)
(turn off when input voltage
decreassing)
Input undervoltage release (UVR)
(turn on when input voltage rising)
1,2,3
1,2,3
No load to full load, Notes 1, 4
No load to full load, Notes 1, 4
14.5
15.5
16.5
17.9
V
V
Input undervoltage
Hysteresis (UVR-UVLO)
1,2,3
1,2,3
No load to full load, Notes 1, 4
1.0
1.4
3.0
1.6
V
Input current telemetry ratio( ICT)
V/A
I
= 100% rated load, Note 4
OUT
For Notes to Electrical Performance Characteristics, refer to page 7
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5
LSO SERIES
28V Input, Single/Dual Output
Electrical Performance Characteristics (continued)
Conditions
-55°C ≤ T ≤ +85°C
C
= 28V DC ± 5%, C = 0
Limits
Nom
Group A
Subgroup
Parameter
Unit
V
IN
L
Min
115
Max
125
unless otherwise specified
Overvoltage protection (OVP)
% of
nominal
Vout
Output voltage threshold
(for single and each of dual
output models)
1,2,3
No load to full load, Notes 1, 4
Enable Input ( Inhibit Function )
open circuit voltage
Note 1
3.0
5.0
5.0
50
V
mA
V
drive current ( sink )
voltage range
-0.5
Current Limit Point
Expressed as a percentage
of full rated load current
1,2,3
1,2,3
105
-300
-300
145
16
%
W
V
= 90% of Nominal, Note 4
OUT
Short Circuit, Overload, Note 8
Power dissipation, load fault (P
Output response to
step load changes (V
)
D
4,5,6
4,5,6
Half Load to/from Full Load, Notes 4,9
300
200
300
200
mV pk
)
TLD
Recovery time,
step load changes (T
Half Load to/from Full Load, Notes
4,9,10
µs
)
TLD
Output response to
step line changes (V
18V to/from 40V
= 100% rated load, Notes 1,4,11
mV pk
)
I
TLN
OUT
Recovery Time,
step line changes (T
18V to/from 40V
= 100% rated load, Notes
1, 4,10,11
µs
mV
ms
)
I
TLN
OUT
Turn-on Overshoot (V
)
50
10
OS
10% Load, Full Load
Notes 4,12
All Single and Dual Output Models
Turn-on Delay ( TDLY
All Single and Dual Output Models
Capacitive Load (C
4,5,6
0
)
)
L
2500
2500
2500
2200
1000
180
120
500
90
I
= 100% rated load
LSO2801R5S
LSO2801R8S
LSO2802R5S
LSO2803R3S
LSO2805S
LSO2812S
LSO2815S
LSO2805D
LSO2812D
LSO2815D
OUT
No effect on DC performance
Notes 1, 4, 7
µF
dB
Each output on duals
60
I
= 100% rated load
OUT
Line Rejection
Isolation
1
1
40
20
50
DC to 50KHz, Notes 1, 4
Input to Output or Any Pin to Case
except Pin 6, test @ 100VDC
MΩ
g
Device Weight
MTBF
125
6
MIL-HDBK-217F2, SF, 35°C
Hr
4.0 x 10
Note 14
For Notes to Electrical Performance Characteristics, refer to page 7
6
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LSO SERIES
28V Input, Single/Dual Output
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
shown in Fig.1.
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 ≤ 10µs.
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 ≤ 100µs.
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 3) to the point where VOUT = 90% of nominal.
13. End of ife (EOL) is ±3%
14. MIL-HDBK MOSFET failure rates replaced by empirical failure rate data supplied by Intenational Rectifier.
Fig. 1 - Circuit for measuring Output Ripple Voltage
µ
1
F
50Ω
50Ω Coax
µ
0.1
F
50 Ω
Termination
Radiation Performance Characteristics
Test Inspection
Method
Min
Typ
Unit
MIL-PRF-883, Method 1019
Total Ionizing Dose (Gamma)
Operating bias applied during exposure,
100
150
Krads(Si)
Full Rated Load, V = 28V
IN
Heavy Ions (LET)
Single Event Effects
Operating bias applied during exposure,
2
Full Rated Load, V = 28V
SEU, SEL, SEGR, SEB
82
IN
MeV cm /mg
Test lab: Cyclotron Institute
Texas A & M University
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7
LSO SERIES
28V Input, Single/Dual Output
Fig. 2 - Single Output Block Diagram
LSO28XXS
EMI
Filter
13
1
2
12
7
UVLO &
Inhibit
Bias
Supply
Bus
Current
Telemetry
3
4
Overcurrent
Protection
Shutdown
Latch
5
FET
Driver
4.4V
Reg
10
9
6
Error
Amplifier
8
Ramp
+
-
Gen. Sample &
Ref &
S.S.
Hold
Soft Start
Feedback
Trigger
Oscillator
11
OVP
Fig. 3 - Dual Output Block Diagram
LSO28XXD
EMI
Filter
13
12
1
2
UVLO &
Inhibit
Bias
Supply
3
4
11
7
Bus
Current
Telemetry
Overcurrent
Protection
Shutdown
Latch
5
6
FET
Driver
4.4V
Reg
Error
Amplifier
8
Ramp
+
Ref &
S.S.
Gen.
Sample &
Hold
Soft Start
5V
Reg
-
-Out
OVP
Feedback
Trigger
9
Oscillator
+Out
OVP
10
8
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LSO SERIES
28V Input, Single/Dual Output
Application Notes:
Fig. 4 - Typical Connections Diagram
Remote Sense:
Inhibit Function:
A remote sense feature maintains the desired output
voltage regulation at the load. It corrects the voltage drop
along the conductors between converter’s output and the
load. To use this function connect ±sense pins directly to
the load as shown in Fig. 6. To use a converter without
remote sense function, connect the ±sense pins to output
pins respectively. This function is available just on single
output models.
The converter is disabled when the INHIBIT pin is
shorted to the INHIBIT RETURN with an impedance less
than or equal to 1K ohm, and that the converter be
enabled when the impedance between the INHIBIT pin
and INHIBIT RETURN is greater than or equal to 500K
ohms.
Fig. 5 - Inhibit Function
Fig. 6 - Remote Sense - Single Models
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9
LSO SERIES
28V Input, Single/Dual Output
Output Voltage Adjustment:
Table 2. LSO2805S. Output Voltage Ranges and Constants
Output of LSO singles and duals can be adjusted to be
greater or less 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
Table 2. An approximate value of the resistor can be
determined using the following formula.
Output voltage
Low range
4.750 to 5.000
588.3 x106
264.5 x106
7950
Output voltage
High range
5.000 to 5.250
587.8x106
699.6 x106
7950
Constants
A
B
C
D
39716
39717
For Single Output Model:
Table 3. LSO2815S. Output Voltage Ranges and Constants
Output voltage
Low range
14.250 to 15.000
588.3 x106
264.5 x106
7950
Output voltage
High range
15.000 to 15.750
1451.2x106
57.5 x106
-
A
(B Vout )
*
Radj
=
Constants
-
out
)
D
(C
V
*
A
B
C
D
For Dual Output Model:
6540
39717
39716
-
A
(B
2
Vout )
*
*
Radj
=
Table 4. LSO2805D. Output Voltage Ranges and Constants
-
2 Vout ) D
*
(C
*
Output voltage
Low range
4.750 to 5.000
1012.4x106
395.0x106
6840
Output voltage
High range
5.000 to 5.250
1011.5x106
60.1x106
Where:
Constants
A
B
C
D
Radj is the external resistor in ohms, as shown in Fig 7.
Power rating of the resistor shall be ≥ 0.125 W. 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.
6840
68344
68344
Table 5. LSO2815D. Output Voltage Ranges and Constants
Output voltage
Low range
14.250 to 15.000
2780.2x106
974.8x106
Output voltage
High range
15.000 to 15.750
2777.9x106
55.0x106
Vovp is the output voltage in volts.
Constants
A
B
C
D
A, B, C and D are unique constants depending on every
model as shown in Table 1 for single output models and
Table 2 for dual output models.
6260
187646
6260
187646
Placement of Radj: An external resistor must be added
in order to trim the output voltage of a LSO converter.
The placement of a Radj resistor must be connected as
shown in Fig. 7.
Fig. 7 - Output Voltage Adjustment
Singles: Radj is placed across Out Adj and ± Sense
pins. For output voltage greater than nominal voltage,
Radj is placed from Out Adj to –Sense. To have output
voltage less than nominal voltage, place Radj across Out
Adj and +Sense.
Duals: Radj is placed across Out Adj and ± Output pins
respectively.
Table 1. LSO2803R3S. Output Voltage Ranges and Constants
Output voltage
Low range
3.135 to 3.300
466.4 x106
238.3 x106
9550
Output voltage
High range
3.300 to 3.465
466.0x106
84.0 x106
Constants
A
B
C
D
9550
31489
31489
10
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LSO SERIES
28V Input, Single/Dual Output
Table 7. LSO Duals. OVP Exeternal
OVP External Adjustment:
LSO2805DS
LSO2815D
Over-voltage Protection threshold of LSO singles and
duals can be adjusted to be greater or less the nominal
OVP with a couple of external resistors. Lower resistors,
R1 and R2 are 10KΩ resistors, while Radj set the new
OVP threshold as stated in Table 6 for single output
models and Table 7 for dual output models. Ranges of
LSO series converter can be adjusted from 115% to
125% of the nominal output voltage. See Fig.8 to place
external resistors.
Radj
OVP
Radj
Range
OVP
(KΩ)
(KΩ)
101
107
113
121
128
137
146
157
169
183
199
Vo* (115%)
Vo* (116%)
Vo* (117%)
Vo* (118%)
Vo* (119%)
Vo* (120%)
Vo* (121%)
Vo* (122%)
Vo* (123%)
Vo* (124%)
Vo* (125%)
5.75
5.80
5.85
5.90
5.95
6.00
6.05
6.10
6.15
6.20
6.25
26
28
30
33
36
39
43
47
51
57
64
17.25
17.40
17.55
17.70
17.85
18.00
18.15
18.30
18.45
18.60
18.75
An approximate value of the resistor can be determined
using the following formula.
Fig. 8 - OVP with External Adjustment
-
(A Vovp) B
*
Radj
=
-
C
(D Vovp)
*
Where:
Radj is the upper external resistor in kilo-ohms, as shown
in Fig 8. Power rating of the resistor shall be
≥ 0.125 W. 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.
Vovp is the output voltage protection limit in volts.
A, B, C and D are unique constants depending on every
model.
Placement of Radj: Two external resistors must be
added in order to set new OVP threshold.
Singles: Radj(OVP) is placed across +Output and OVP
Adj pins and R1 from OVP Adj to -Output.
Duals: Radj(+OVP) is placed across +Output and +OVP
Adj pins and R1 from +OVP Adj to -Return. Radj(-OVP) is
placed across +Return and -OVP Adj pins while R2 is
placed across -OVP Adj to –Output.
Stacking Outputs:
On dual output models, output can be stacked to double
the output voltage as shown in Fig 9.
Table 6. LSO Singles. OVP Exeternal
LSO2803R3S
LSO2805S
LSO2815S
Fig. 9 - Stacked Outputs on Dual Models
Radj
OVP
Radj
Radj
Range
OVP
OVP
(KΩ)
(KΩ)
26
28
31
33
36
39
42
46
51
56
63
(KΩ)
102
108
114
121
128
137
146
157
168
181
197
Vo* (115%)
Vo* (116%)
Vo* (117%)
Vo* (118%)
Vo* (119%)
Vo* (120%)
Vo* (121%)
Vo* (122%)
Vo* (123%)
Vo* (124%)
Vo* (125%)
3.79
3.82
3.86
3.89
3.92
3.96
3.99
4.02
4.05
4.09
4.12
13
15
16
18
20
22
25
28
31
36
41
5.75
5.80
5.85
5.90
5.95
6.00
6.05
6.10
6.15
6.20
6.25
17.25
17.40
17.55
17.70
17.85
18.00
18.15
18.30
18.45
18.60
18.75
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11
LSO SERIES
28V Input, Single/Dual Output
Typical Performance Curves: 25°C TC, 28 VDC VIN, Rated Load, unless otherwise specified
Fig. 10 - LSO2805S Efficiency
Fig. 11 - LSO2805S Output Ripple
Fig. 12 - LSO2805S Step Line Response,
18V to/from 40V.
Fig. 13 - LSO2805S Step Load Response,
Half Load to/from Full Load, 0.25A/µs Slew Rate.
Fig. 14 - LSO2805S Turn On Response
Fig. 15 - LSO2805S Loop Response,
Phase = 60.01 and Gain = -17.81dB
12
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LSO SERIES
28V Input, Single/Dual Output
Typical Performance Curves: 25°C TC, 28 VDC VIN, Rated Load, unless otherwise specified
Fig. 16 - LSO2815D Efficiency
Fig. 17 - LSO2815D Output Ripple
Fig. 18 - LSO2815D Step Line Response,
18V to/from 40V.
Fig. 19 - LSO2815D Step Load Response,
Half Load to/from Full Load, 0.05A/µs Slew Rate.
Fig. 20 - LSO2815D Turn On Response
Fig. 21 - LSO2815D Loop response,
Phase = 61.46 and Gain = -22.45dB
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13
LSO SERIES
28V Input, Single/Dual Output
Typical Performance Curves: 25°C TC, 28 VDC VIN, Rated Load, unless otherwise specified
Fig. 22 - LSO2803R3S Efficiency.
Fig. 23 - LSO2815S Efficiency.
Fig. 24 - LSO2805D Efficiency.
14
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LSO SERIES
28V Input, Single/Dual Output
Typical Performance Curves: 25°C TC, 28 VDC VIN, Rated Load, unless otherwise specified
Fig. 25 - LSO2805S Full Load, Common Mode, Neagtive Lead.
Fig. 26 - LSO2805S Full Load, Common Mode, Positive Lead.
Fig. 27 - LSO2805S Full Load, Common Mode, Positive Lead.
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15
LSO SERIES
28V Input, Single/Dual Output
Typical Performance Curves: 25°C TC, 28 VDC VIN, Rated Load, unless otherwise specified
Fig. 28 - LSO2815D Full Load, Common Mode, Neagtive Lead.
Fig. 29 - LSO2815D Full Load, Common Mode, Positive Lead.
Fig. 30 - LSO2815D Full Load, Common Mode, Positive Lead.
16
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LSO SERIES
28V Input, Single/Dual Output
Mechanical Outline
3.055 MAX.
0.080
Max.
0.500
2.00
R0.0625
4 places
0.30
0.50
0.20
13
12
11
10
9
1
2
0.200 Typ.
Non-
cum.
2.055
MAX.
1.400
Ref.
0.60
2.30
2.500
3
4
5
8
7
6
Pin
Ø0.040
0.45
1.10
0.260
FLANGE DETAIL
3.50
Ref.
0.25
0.25
0.14
0.475
MAX.
0.40
Tolerance : .XX
±0.01
.XXX ±0.005
Note: Standard leads finish is solder dipped.
Pin Designation (Single/Dual)
Pin #
Single
Dual
1
2
Input
Input Return
Inhibit
Input
Input Return
Inhibit
3
4
Inhibit Return
U/V Latch
Inhibit Return
U/V Latch
Case Ground
5
6
Case Ground
Input Current Telemetry
Output Adjust
- Sense
7
Input Current Telemetry
Output Adjust
- OVP Adjust
+ OVP Adjust
- Output
8
9
10
11
12
13
+ Sense
OVP Adjust
- Output
Output Return
+ Output
+ Output
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17
LSO SERIES
28V Input, Single/Dual Output
Device Screening
Requirement
MIL-STD-883 Method
No Suffix (Flight Model) EM (Engineering Model)
Temperature Range
Element Evaluation
Non-Destruction Bond Pull
Internal Visual
-55°C to +85°C
Class K
-55°C to +85°C
MIL-PRF-38534
2023
N/ A
N/ A
YES
2017
YES
Temperature Cycle
Constant Acceleration
PIND
1010
Cond C
Cond C
2001, Y1 Axis
2020
3000 Gs
Cond A
3000 Gs
N/ A
320 hrs @ 125°C
(2 x 160 hrs)
-55°C, +25°C,+ 85°C
2%
48 hrs @ 125°C
Burn-In
1015
Final Electrical (Group A) MIL-PRF-38534 & Specification
-55°C, +25°C, +85°C
PDA
MIL-PRF-38534
1014
N/ A
Seal, Fine and Gross
Radiographic
Cond A, C
Yes
Cond A
2012
N/ A
External Visual
2009
Yes
Notes:
Best commercial practice
Part Numbering
LSO 28 05
S
/EM
Screening Level
(Please refer to Screening Table)
Model
No Suffix, EM
Input Voltage
Nominal
28 = 28V
Output
S = Single
D = Dual
Output Voltage
01R5 = 1.5V, 01R8 = 1.8V,
02R5 = 2.5V, 03R3 = 3.3V,
05 = 5V, 12 = 12V, 15 = 15V
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Data and specifications subject to change without notice. 08/2013
18
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