M3L2815S [INFINEON]
ADVANCED ANALOG HIGH RELIABILITY RADIATION TOLERANT DC/DC CONVERTERS; 先进的模拟高可靠性抗辐射DC / DC转换器
| 型号： | M3L2815S |
| 厂家： | 
Infineon |
| 描述： | ADVANCED ANALOG HIGH RELIABILITY RADIATION TOLERANT DC/DC CONVERTERS |
| 文件： | 总11页 (文件大小：89K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PD - 94519A
L-SERIES
+ 28V Input, Single/Dual Output
ADVANCED ANALOG
HIGH RELIABILITY RADIATION
TOLERANT DC/DC CONVERTERS
Description
The L-Series of DC/DC converters are radiation toler-
ant, high reliability devices designed for moderate ra-
diation environments such as those encountered by low
earth orbit satellites and launch vehicles. For higher
radiation environments, the G-Series of DC/DC con-
Features
verters is recommended. Features include small size,
low weight and a high tolerance to total ionizing dose,
single event effects and environmental stresses such as
temperature extremes, mechanical shock, and vibration.
All components are fully derated to meet the require-
ments of MIL-STD-975 and MIL-STD-1547 and GSFC
PPL-21 Appendix B. Extensive documentation includ-
ing Radiation Susceptibility, Thermal Analysis, Stress
Analysis and MTBF are available.
n Total Dose > 25K Rad(Si)
n SEE > 37 MeV.cm2/mg
n Internal EMI filter; Converter Capable of
meeting MIL-STD-461C CE03 and CS01
n Low Weight, < 85 grams
n Magnetically Coupled Feedback
n 16V to 50V DC Input Range
n Up to 25W Output Power
n Single and Dual Output Models Include
3.3, 5, 12, 15, ±5, ±12 and ±15V
n High Efficiency - to 82%
n -55°C to +125°C Operating Temperature
Range
n 100MΩ @ 500VDC Isolation
n Under-Voltage Lockout
n Short Circuit and Overload Protection
n Output Over Voltage Limiter
n Adjustable Output Voltage
n External Inhibit
The converters incorporate a fixed frequency single for-
ward topology with magnetic feedback and an internal
EMI filter. These converters are capable of meeting the
conducted emissions and conducted susceptibility re-
quirements of MIL-STD-461C without any additional
components. All models include an external inhibit port
and have an adjustable output voltage. They are en-
closed 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 1,500,000 Hour MTBF
Full environmental screening includes temperature cy-
cling, constant acceleration, fine and gross leak, and
burn-in.
Applications
n
Low Earth Orbit Satellites (LEO)
Non-flight versions of the L-Series converters are avail-
able for system development purposes. Variations in
electrical specifications and screening to meet custom
requirements can be accommodated.
n
Launch Vehicles
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1
08/20/02
L-SERIES
Circuit Description
An external inhibit port is provided to control con-
verter operation. The converter’s operation is inhib-
ited 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 10.5V with respect to
the input return (pin 2).
The L-Series converters utilize a single-ended for-
ward 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 volt-
age in the event of an internal control loop failure.
This mechanism limits the maximum output voltage
to approximately 20% over the nominal regardless of
the line voltage.
The output voltage of all models can be adjusted
using a single external resistor.
Design Methodology
The L-Series was developed using a proven con-
servative design methodology which includes se-
lecting radiation tolerance and established reliabil-
ity components and fully derating to the requirements
of MIL-STD-975 and MIL-STD-1547. Heavy derat-
ing of the power MOSFET gate and drain voltages
minimize the possibility of SEGR and SEB. A mag-
netic feedback circuit is utilized instead of opto-cou-
plers to minimize temperature, radiation and aging
sensitivity. PSPICE was used extensively to predict
and optimize circuit performance for both beginning
and end-of-life. Thorough design analyses include
Radiation Susceptibility ( TREE ), Stress, Thermal,
and Reliability ( MTBF ).
An internal EMI filter allows the converter to meet the
conducted emissions requirements of MIL-STD-461C
on the input power leads. A single-stage output filter
reduces the typical output ripple to less than 50mV
peak-to-peak.
Output current is limited under any load fault condi-
tion to approximately 125% of rated. An overload
condition causes the converter output to behave like
a constant current source with the output voltage drop-
ping below nominal. The converter will resume nor-
mal operation when the load current is reduced be-
low the current limit point. This protects the converter
from both overload and short circuit conditions. The
current limit point exhibits a slightly negative tem-
perature coefficient to reduce the possibility of ther-
mal runaway.
2
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L-SERIES
Absolute Maximum Ratings
Recommended Operating Conditions
Input voltage range -
Output power -
Lead temperature -
Operating temperature - -55°C to +135°C
Storage temperature - -55°C to +135°C
-0.5Vdc to +60Vdc
Internally limited
+300°C for 10 seconds
Input voltage range -
Input voltage range1 -
Output power -
16Vdc to +60Vdc
16Vdc to +38Vdc
0 to Max. Rated
Operating temperature2 - -55°C to +125°C
Operating temperature1 - -55°C to +70°C
1 Meets derating per MIL-STD-975
2For operation at +125°C see table note 13
Electrical Performance Characteristics
Conditions
Limits
-55°C ≤ TC ≤ +85°C
Group A
VIN = 28V DC ± 5%, CL = 0
unless otherwise specified
Subgroup
Parameter
Unit
V
Min
18
Nom
28
Max
50
Input Voltage
Output Voltage ( Vout )
M3L2803R3S
M3L2805S
1
1
1
1
1
1
1
IOUT = 100% rated load
Note 4
3.27
4.95
3.30
5.00
3.33
5.05
V
V
V
V
V
V
V
M3L2812S
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
M3L2815S
M3L2805D
M3L2812D
M3L2815D
M3L2803R3S
M3L2805S
M3L2812S
M3L2815S
M3L2805D
M3L2812D
M3L2815D
2,3
2,3
2,3
2,3
2,3
2,3
2,3
I
OUT = 100% rated load
Note 4
3.23
4.90
3.37
5.10
V
V
V
V
V
V
V
11.76
14.70
±4.90
±11.76
±14.70
12.24
15.30
±5.10
±12.24
±15.30
Output power ( POUT
M3L2803R3S
All Others
)
1,2,3
1,2,3
VIN = 16, 28, 50 Volts, Note 2
0
0
20
25
W
W
Output current ( IOUT
)
M3L2803R3S
M3L2805S
M3L2812S
M3L2815S
M3L2805D
M3L2812D
M3L2815D
VIN = 16, 28, 50 Volts, Note 2
0
0
0
0
0
0
0
6.06
5.00
2.08
1.67
4.00
1.67
1.33
A
A
A
A
A
A
A
Either Output, Note 3
Either Output, Note 3
Either Output, Note 3
Line regulation ( VRLINE
)
1,2,3
1,2,3
VIN = 16, 28, 50 Volts
-0.5
-1.0
0.5
1.0
%
%
IOUT = 0, 50%, 100% rated, Note 4
Load regulation ( VRLOAD
)
IOUT = 0, 50%, 100% rated, Note 4
VIN = 16, 28, 50 Volts
Cross regulation ( VRCROSS
M3L2805D
)
1,2,3
VIN = 16, 28, 50 Volts
Duals only, Note 5
-5.0
-3.0
-3.0
5.0
3.0
3.0
%
%
%
M3L2812D
M3L2815D
For Notes to Specifications, refer to page 5
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3
L-SERIES
Electrical Performance Characteristics ( continued )
Conditions
Limits
Nom
-55°C ≤ TC ≤ +85°C
IN = 28V DC ± 5%, CL = 0
Group A
V
Parameter
Subgroup
Unit
unless otherwise specified
Min
Max
Input current, no load ( IIN
M3L2803R3S
M3L2805S
)
1,2,3
I
OUT = 0, Pin 4 open
60
70
mA
mA
mA
mA
mA
mA
mA
M3L2812S
70
M3L2815S
70
M3L2805D
70
M3L2812D
100
100
M3L2815D
Input current inhibited
1,2,3
1,2,3
Pin 4 shorted to pin 2
8
mA
Output ripple ( VRIP
)
M3L2803R3S
M3L2805S
M3L2812S
M3L2815S
M3L2805D
M3L2812D
M3L2815D
V
IN = 16, 28, 50 Volts
35
50
70
80
80
80
80
mV p-p
mV p-p
mV p-p
mV p-p
mV p-p
mV p-p
mV p-p
IOUT = 100% rated load
Notes 4, 6
Switching frequency ( FS
)
1,2,3
1,2,3
Sync. Input (Pin 4) open
425
500
575
KHz
Efficiency ( EFF
)
M3L2803R3S
M3L2805S
M3L2812S
M3L2815S
M3L2805D
M3L2812D
M3L2815D
I
OUT = 100% rated load
Note 4
68
75
75
75
75
75
75
75
79
80
81
79
79
80
%
%
%
%
%
%
%
Enable Input ( Inhibit Function )
open circuit voltage
drive current ( sink )
voltage range
V
µA
V
1,2,3
1,2,3
Note 1
9.5
11.5
500
50
-0.5
105
Current Limit Point
Vout = 90% of Nominal, Note 4
130
%
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
mV pk
step load changes (VTLD
)
Recovery time,
4,5,6
4,5,6
4,5,6
Half Load to/from Full Load, Note
4,9,10
200
300
200
µS
mV pk
µS
step load changes (TTLD
)
Output response to
16V to/from 50V
-300
step line changes (VTLN
)
IOUT = 100% rated load, Notes 1,4,11
Recovery Time,
16V to/from 50V
IOUT = 100% rated load, Notes
1,4,10,11
step line changes (TTLN
)
Turn-on Response
Overshoot (VOS
)
4,5,6
No Load, Full Load
Notes 4,12
500
10
mV
mS
Turn-on Delay (TDLY
)
2
For Notes to Specifications, refer to page 5
4
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L-SERIES
Electrical Performance Characteristics ( continued )
Conditions
-55°C ≤ TC ≤ +85°C
IN = 28V DC ± 5%, CL = 0
Group A
V
Parameter
Subgroup
unless otherwise specified
Limits
Unit
Capacitive Load (CL)
M3L2803R3S
M3L2805S
1
I
OUT = 100% rated load
2200
µF
µF
µF
µF
µF
µF
µF
No effect on DC performance
Notes 1, 4, 7
1000
180
120
500
90
M3L2812S
M3L2815S
M3L2805D
M3L2812D
Each output on duals
M3L2815D
60
Line Rejection
Isolation
1
1
IOUT = 100% rated load
40
50
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
grams
Hours
6
1.5 x 10
MIL-HDBK-217F2, SF, 35°C
Table I. Electrical Performance Characteristics - notes
1)
Parameter is tested as part of design characterization or after design changes. Thereafter, parameter shall be guaranteed to the
limits specified.
2)
3)
4)
5)
Parameter verified during line and load regulation tests.
Output load current must be distributed such that at least 20% of the total load current is being provided by one of the outputs.
Load current split equally between outputs on dual output models.
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)
7)
Guaranteed for a D.C. to 20MHz bandwidth. Tested using a 20KHz to 10MHz bandwidth using the circuit shown below.
Capacitive load may be any value from 0 to the maximum limit without compromising dc performance. A capacitive load in excess
of the maximum limit may interfere with the proper operation of the converter’s overload protection, causing erratic behavior during
turn-on.
8)
9)
Overload power dissipation is defined as the device power dissipation with the load set such that VOUT = 90% of nominal.
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, derate the maximum output power linearly from 100% to 75%.
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5
L-SERIES
Radiation Performance Characteristics
Highest
Level
Test
Conditions
Min
25
Typ
40
Tested
Unit
Total Ionizing Dose ( Gamma )
MIL-STD-883, Method 1019
Operating bias applied during exposure,
Full Rated Load, VIN = 28V
60
KRads
(Si)
MeV•cm2
Single Event Effects
Heavy ions (LET)
37
82
82
SEU, SEL, SEGR, SEB
Operating bias applied during exposure,
Full Rated Load, VIN = 28V
/mg
Dose Rate ( Gamma Dot )
Temporary Saturation
Survival
MIL-STD-883, Method 1023
Operating bias applied during exposure,
Full Rated Load, VIN = 28V
1E8
1E10
1.5E9
8E12
N/A
Rads
(Si)/sec
Neutron Fluence
MIL-STD-883, Method 1017
3E12
Neutrons
/cm2
Proton Fluence
E > 10MeV
TBD
protons
/cm2
Device Screening
Test Inspection
Method
Condition
Element Evaluation
Nondestructive Bond Pull
Internal Visual
MIL-PRF-38534 class H equivalent with SEM
MIL-STD-883, Method 2023
MIL-STD-883, Method 2017
Temperature Cycling
Constant Acceleration
Electrical
MIL-STD-883, Method 1010
C
MIL-STD-883, Method 2001 (2k-g)
A, Y1 axis only
In accordance with
device specification
Burn-in
MIL-STD-883, Method 1015
160 Hours
Final Electrical ( Group A )
In accordance with
device specification
Seal
Fine Leak
Gross Leak
A1
C
MIL-STD-883, Method 1014
MIL-STD-883, Method 2009
External Visual
6
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L-SERIES
EMI
FILTER
Vin
1
7
+OUTPUT
OUTPUT
RETURN
+10.5V
6
BIAS
SUPPLY
INHIBIT
4
RETURN
2
3
CASE
GROUND
OUTPUT
ADJUST
+
-
5
EA
PWM
CONTROLLER
SAMPLE
&
RAMP
GEN.
HOLD
FEEDBACK
TRIGGER
Block Diagram - Single Output
EMI
FILTER
Vin
1
8
7
6
+OUTPUT
RETURN
-OUTPUT
+10.5V
BIAS
SUPPLY
INHIBIT
4
RETURN
2
3
CASE
GROUND
OUTPUT
ADJUST
+
-
5
EA
PWM
CONTROLLER
SAMPLE
&
RAMP
GEN.
HOLD
FEEDBACK
TRIGGER
Block Diagram - Dual Output
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7
L-SERIES
100
90
80
70
60
50
40
30
20
10
CEO3 LIMIT
0
1E3
1E4
1E5
1E6
1E7
1E8
Frequency ( Hz )
Conducted Emissions, Common Mode
100
90
80
70
60
50
40
30
20
10
CEO3 LIMIT
0
1E3
1E4
1E5
1E6
1E7
1E8
Frequency ( Hz )
Conducted Emissions, Normal Mode
8
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L-SERIES
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
1E2
1E3
1E4
1E5
Frequency ( Hz )
M3L2805S Line Rejection (CS01)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
1E2
1E3
1E4
1E5
Frequency ( Hz )
M3L2815D Line Rejection (CS01)
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9
L-SERIES
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
1E2
1E3
1E4
1E5
Frequency ( Hz )
M3L2815D Line Rejections (CS01)
1 µF
50
Ω
50 C oax
Ω
O scilliscope or Equivalent
w ith 10 M H z B andw idth.
M ultiply readings by 2.
0.1 µF
+ Vout
R eturn
50
Ω
Term ination
DUT
R L for IRATED
Circuit for Measuring Output RippleVoltage
10
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L-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
0.425
M ax
.XXX = ±0.005
Pin Designation (Single/Dual)
Part Number
Pin Number Single
Dual
M3L 28 05 S
Outputs
Pin 1 + Input
+ Input
Model
S = Single
Pin 2 Input Return
Pin 3 Case
Input Return
Case
D = Dual
Input Voltage
28 = 28V Nominal
Output Voltage
03R3 = 3.3V, 05 = 5V
12 = 12V, 15 = 15V
Pin 4 Inhibit
Inhibit
Pin 5 Output Adjust
Output Adjust
Pin 6 Output Return - Vout
Pin 7 + Vout
Pin 8 NC
Output Common
+ Vout
WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 322 3331
ADVANCED ANALOG: 2270 Martin Av., Santa Clara, California 95050, Tel: (408) 727-0500
Visit us at www.irf.com for sales contact information.
Data and specifications subject to change without notice. 02/03
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11
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