AFL1203R3SW/CHPBF
更新时间:2024-09-18 17:54:44
品牌:INFINEON
描述:DC-DC Regulated Power Supply Module, 1 Output, 66W, Hybrid, 0.380 INCH, LOW PROFILE, SEAM WELDED PACKAGE-12
AFL1203R3SW/CHPBF 概述
DC-DC Regulated Power Supply Module, 1 Output, 66W, Hybrid, 0.380 INCH, LOW PROFILE, SEAM WELDED PACKAGE-12
AFL1203R3SW/CHPBF 数据手册
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AFL1203R3S
120V Input, 3.3V Output
ADVANCED ANALOG
HIGH RELIABILITY
HYBRID DC/DC CONVERTER
Description
The AFL Series of DC/DC converters feature high power
density with no derating over the full military tempera-
ture range. This series is offered as part of a complete
family of converters providing single and dual output
voltages and operating from nominal +28 or +270 volt
inputs with output power ranging from 66 to 120 watts.
For applications requiring higher output power, multiple
converters can be operated in parallel. The internal cur-
rent sharing circuits assure equal current distribution
among the paralleled converters. This series incorpo-
rates Advanced Analog’s proprietary magnetic pulse
feedback technology providing optimum dynamic line
and load regulation response. This feedback system
samples the output voltage at the pulse width modulator
fixed clock frequency, nominally 550 KHz. Multiple con-
verters can be synchronized to a system clock in the
500 KHz to 700 KHz range or to the synchronization
output of one converter. Undervoltage lockout, primary
and secondary referenced inhibit, soft-start and load
fault protection are provided on all models.
AFL
Features
n 80 To 160 Volt Input Range
n 3.3 Volt Output
n High Power Density - 50 W / in
n 66 Watt Output Power
n Parallel Operation with Stress and Current
Sharing
n Low Profile (0.380") Seam Welded Package
n Ceramic Feedthru Copper Core Pins
n High Efficiency - to 74%
3
n Full Military Temperature Range
n Continuous Short Circuit and Overload
Protection
n Remote Sensing Terminals
n Primary and Secondary Referenced
Inhibit Functions
n Line Rejection > 50 dB - DC to 50KHz
n External Synchronization Port
n Fault Tolerant Design
These converters are hermetically packaged in two en-
closure variations, utilizing copper core pins to mini-
mize resistive DC losses. Three lead styles are avail-
able, each fabricated with Advanced Analog’s rugged
ceramic lead-to-package seal assuring long term
hermeticity in the most harsh environments.
n Dual Output Versions Available
n Standard Military Drawings Available
Manufactured in a facility fully qualified to MIL-PRF-
38534, these converters are available in four screening
grades to satisfy a wide range of requirements. The CH
grade is fully compliant to the requirements of MIL-PRF-
38534 for class H. The HB grade is fully processed and
screened to the class H requirement, but does not have
material element evaluated to the class H requirement.
Both grades are tested to meet the complete group “A”
test specification over the full military temperature range
without output power deration. Two grades with more
limited screening are also available for use in less de-
manding applications. Variations in electrical, me-
chanical and screening can be accommodated.
Contact Advanced Analog for special require-
ments.
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1
07/10/02
AFL1203R3S
Specifications
ABSOLUTE MAXIMUM RATINGS
Input Voltage
-0.5V to 180V
Soldering Temperature
Case Temperature
300°C for 10 seconds
Operating
Storage
-55°C to +125°C
-65°C to +135°C
Electrical Performance Characteristics -55°C < TCASE < +125°C, 80V< VIN < 160V unless otherwise specified.
Group A
Parameter
INPUT VOLTAGE
Subgroups
Test Conditions
Min
Nom
Max
Unit
Note 6
80
120
160
V
V
= 120 Volts, 100% Load
OUTPUT VOLTAGE
IN
1
3.27
3.23
3.30
3.33
3.37
V
V
2, 3
V
= 80, 120, 160 Volts, Note 6
20
66
A
OUTPUT CURRENT
IN
OUTPUT POWER
Note 6
Note 1
W
MAXIMUM CAPACITIVE LOAD
4
10,000
-0.015
µfd
V
= 120 Volts, 100% Load - Note
+0.015
%/°C
OUTPUT VOLTAGE
TEMPERATURE COEFFICIENT
IN
1, 6
OUTPUT VOLTAGE REGULATION
1, 2, 3
1, 2, 3
No Load, 50% Load, 100% Load
-10.0
-35.0
+10.0
+35.0
mV
mV
Line
V
IN
= 80, 120, 160 Volts
Load
V
IN
= 80, 120, 160 Volts, 100%
OUTPUT RIPPLE VOLTAGE
1, 2, 3
30
mV
pp
Load,
BW = 10MHz
V
IN
= 120 Volts
INPUT CURRENT
1
2, 3
1, 2, 3
1, 2, 3
30
40
3.0
5.0
mA
mA
mA
mA
No Load
I
= 0
OUT
Inhibit 1
Inhibit 2
Pin 4 Shorted to Pin 2
Pin 12 Shorted to Pin 8
V
= 120 Volts, 100% Load
INPUT RIPPLE CURRENT
IN
B.W. = 10MHz
= 90% V
1, 2, 3
60
mA
pp
V
Note 5
CURRENT LIMIT POINT
OUT
NOM
1
2
3
115
105
125
125
115
140
%
%
%
Expressed as a Percentage
of Full Rated Load
VIN = 120 Volts
LOAD FAULT POWER DISSIPATION
1, 2, 3
32
W
Overload or Short Circuit
EFFICIENCY
VIN = 120 Volts, 100% Load
1, 2, 3
1, 2, 3
1
72
74
%
SWITCHING FREQUENCY
ISOLATION
500
100
550
600
KHz
MΩ
Input to Output or Any Pin to Case
(except Pin 3). Test @ 500VDC
MIL-HDBK-217F, AIF @ T = 40°C
C
300
KHrs
MTBF
For Notes to Specifications, refer to page 3
2
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AFL1203R3S
Elecrical Performance Characteristics (Continued)
Group A
Parameter
Subgroups
Test Conditions
Min
Nom
Max
Unit
ENABLE INPUTS (Inhibit Function)
Converter Off
1, 2, 3
1, 2, 3
Logical Low, Pin 4 or Pin 12
Note 1
Logical High, Pin 4 and Pin 12 - Note 9
Note 1
-0.5
2.0
0.8
100
50
V
µA
V
Sink Current
Converter On
Sink Current
100
µA
SYNCHRONIZATION INPUT
Frequency Range
1, 2, 3
1, 2, 3
1, 2, 3
500
2.0
-0.5
700
10
0.8
100
80
KHz
V
V
nSec
%
Pulse Amplitude, Hi
Pulse Amplitude, Lo
Pulse Rise Time
Note 1
Note 1
Pulse Duty Cycle
20
LOAD TRANSIENT RESPONSE
Note 2, 8
4, 5, 6
4, 5, 6
Load Step 50%
Load Step 10%
100%
50%
-450
-450
450
200
mV
µSec
Amplitude
Recovery
4, 5, 6
4, 5, 6
450
400
mV
µSec
Amplitude
Recovery
LINE TRANSIENT RESPONSE
Note 1, 2, 3
V
IN
Step = 80
160 Volts
-500
500
500
mV
µSec
Amplitude
Recovery
TURN-ON CHARACTERISTICS
V
= 80, 120, 160 Volts. Note 4
IN
Overshoot
Delay
4, 5, 6
4, 5, 6
Enable 1, 2 on. (Pins 4, 12 high or open)
250
120
mV
mSec
50
50
75
60
Same as Turn On Characteristics.
LOAD FAULT RECOVERY
LINE REJECTION
MIL-STD-461, CS101, 30Hz to 50KHz
Note 1
dB
Notes to Specifications:
1. Parameters not 100% tested but are guaranteed to the limits specified in the table.
2. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1% of VOUT
at 50% load.
3. Line transient transition time ≥ 100 µSec.
4. Turn-on delay is measured with an input voltage rise time of between 100 and 500 volts per millisecond.
5. Current limit point is that condition of excess load causing output voltage to drop to 90% of nominal.
6. Parameter verified as part of another test.
7. All electrical tests are performed with the remote sense leads connected to the output leads at the load.
8. Load transient transition time ≥ 10 µSec.
9. Enable inputs internally pulled high. Nominal open circuit voltage ≈ 4.0VDC.
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3
AFL1203R3S
AFL120XXS Circuit Description
Figure I. AFL Single Output Block Diagram
INPUT
FILTER
DC INPUT
ENABLE 1
1
4
OUTPUT
FILTER
PRIMARY
BIAS SUPPLY
7
+ OUTPUT
+ SENSE
10
CURRENT
SENSE
SYNC OUTPUT
5
SHARE
11
12
SHARE
CONTROL
AMPLIFIER
ERROR
AMP
& REF
SYNC INPUT
CASE
6
3
2
FB
ENABLE 2
SENSE
AMPLIFIER
9
8
- SENSE
INPUT RETURN
OUTPUT RETURN
the sense leads should be connected to their respective
output terminals at the converter. Figure III. illustrates a
typical application.
Circuit Operation and Application Information
The AFL series of converters employ a forward switched
mode converter topology. (refer to Figure I.) Operation of
the device is initiated when a DC voltage whose magnitude
is within the specified input limits is applied between pins 1
and 2. If pin 4 is enabled (at a logical 1 or open) the primary
bias supply will begin generating a regulated housekeeping
voltage bringing the circuitry on the primary side of the con-
verter to life. Two power MOSFETs used to chop the DC
input voltage into a high frequency square wave, apply this
chopped voltage to the power transformer. As this switch-
ing is initiated, a voltage is impressed on a second winding
of the power transformer which is then rectified and applied
to the primary bias supply. When this occurs, the input
voltage is shut out and the primary bias voltage becomes
exclusively internally generated.
Inhibiting Converter Output
As an alternative to application and removal of the DC
voltage to the input, the user can control the converter
output by providing TTL compatible, positive logic signals
to either of two enable pins (pin 4 or 12). The distinction
between these two signal ports is that enable 1 (pin 4) is
referenced to the input return (pin 2) while enable 2 (pin 12)
is referenced to the output return (pin 8). Thus, the user
has access to an inhibit function on either side of the isola-
tion barrier. Each port is internally pulled “high” so that
when not used, an open connection on both enable pins
permits normal converter operation. When their use is
desired, a logical “low” on either port will shut the con-
verter down.
The switched voltage impressed on the secondary output
transformer winding is rectified and filtered to provide the
converter output voltage. An error amplifier on the second-
ary side compares the output voltage to a precision refer-
ence and generates an error signal proportional to the dif-
ference. This error signal is magnetically coupled through
the feedback transformer into the controller section of the
converter varying the pulse width of the square wave sig-
nal driving the MOSFETs, narrowing the width if the output
voltage is too high and widening it if it is too low.
Figure II. Enable Input Equivalent Circuit
+5.6V
100K
1N4148
Pin 4 or
Pin 12
Disable
290K
Remote Sensing
2N3904
Connection of the + and - sense leads at a remotely locat-
led load permits compensation for resistive voltage drop
between the converter output and the load when they are
physically separated by a significant distance. This con-
nection allows regulation to the placard voltage at the point
of application.When the remote sensing features is not used,
150K
Pin 2 or
Pin 8
4
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AFL1203R3S
Internally, these ports differ slightly in their function. In use,
a low on Enable 1 completely shuts down all circuits in the
converter while a low on Enable 2 shuts down the second-
ary side while altering the controller duty cycle to near zero.
Externally, the use of either port is transparent to the user
save for minor differences in idle current. (See specification
table).
high level of +2.0 volts. The sync output of another con-
verter which has been designated as the master oscillator
provides a convenient frequency source for this mode of
operation. When external synchronization is not required,
the sync in pin should be left unconnected thereby permit-
ting the converter to operate at its’ own internally set fre-
quency.
Synchronization of Multiple Converters
The sync output signal is a continuous pulse train set at
550 ±50 KHz, with a duty cycle of 15 ±5%. This signal is
referenced to the input return and has been tailored to be
compatible with the AFL sync input port. Transition times
are less than 100 ns and the low level output impedance is
less than 50 ohms. This signal is active when the DC input
voltage is within the specified operating range and the con-
verter is not inhibited. This output has adequate drive re-
serve to synchronize at least five additional converters. A
typical synchronization connection option is illustrated in
Figure III.
When operating multiple converters, system requirements
often dictate operation of the converters at a common fre-
quency. To accommodate this requirement, the AFL series
converters provide both a synchronization input and out-
put.
The sync input port permits synchronization of an AFL co-
nverter to any compatible external frequency source oper-
ating between 500 and 700 KHz. This input signal should
be referenced to the input return and have a 10% to 90%
duty cycle. Compatibility requires transition times less th
an100 ns, maximum low level of +0.8 volts and a minimum
Figure III. Preferred Connection for Parallel Operation
1
12
Power
Input
Enable
2
Share
Sense
Sense
Return
Vin
Rtn
Case
Enable
+
-
AFL
AFL
1
Sync Out
Sync In
+
Vout
6
1
7
Optional
Synchronization
Connection
Share Bus
12
Enable
2
Vin
Rtn
Share
Sense
Sense
Return
Case
+
-
Enable
1
Sync Out
Sync In
to Load
+
Vout
7
6
1
12
Enable
2
Vin
Rtn
Share
Sense
Sense
Return
Case
+
-
AFL
Enable
1
Sync Out
Sync In
+
Vout
7
6
(Other Converters)
Parallel Operation-Current and Stress Sharing
AFL series operating in the parallel mode is that in addition
to sharing the current, the stress induced by temperature
will also be shared. Thus if one member of a paralleled set
is operating at a higher case temperture, the current it pro-
vides to the load will be reduced as compensation for the
temperature induced stress on that device.
Figure III. illustrates the preferred connection scheme for
operation of a set of AFL converters with outputs operating
in parallel. Use of this connection permits equal sharing of
a load current exceeding the capacity of an individual AFL
among the members of the set. An important feature of the
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5
AFL1203R3S
When operating in the shared mode, it is important that for minor variations of either surface. While other available
symmetry of connection be maintained as an assurance of types of heat conductive materials and compounds may
optimum load sharing performance. Thus, converter out- provide similar performance, these alternatives are often
puts should be connected to the load with equal lengths of
wire of the same gauge and sense leads from each con-
verter should be connected to a common physical point,
preferably at the load along with the converter output and
return leads. All converters in a paralleled set must have
their share pins connected together. This arrangement is
diagrammatically illustrated in Figure III. showing the out-
puts and sense pins connected at a star point which is
located close as possible to the load.
less convinient and are frequently messy to use.
A conservative aid to estimating the total heat sink surface
area (AHEAT SINK) required to set the maximum case temp-
erature rise (∆T) above ambient temperature is given by
the following expression:
−1.43
∆T
A
HEAT SINK
≈
− 3.0
0.85
As a consequence of the topology utilized in the current
sharing circuit, the share pin may be used for other func-
tions. In applications requiring a single converter, the volt-
age appearing on the share pin may be used as a “current
monitor”. The share pin open circuit voltage is nominally
+1.00v at no load and increases linearly with increasing
output current to +2.20v at full load. The share pin voltage is
referenced to the output return pin.
80P
where
∆T = Case temperature rise above ambient
1
P = Device dissipation in Watts = POUT
Eff
−1
As an example, it is desired to maintain the case tempera-
ture of an AFL27015S at ≤ +85°C in an area where the
ambient temperature is held at a constant +25°C; then
Thermal Considerations
Because of the incorporation of many innovative techno-
logical concepts, the AFL series of converters is capable of
providing very high output power from a package of very
small volume. These magnitudes of power density can only
be obtained by combining high circuit efficiency with effec-
tive methods of heat removal from the die junctions. This
requirement has been effectively addressed inside the de-
vice; but when operating at maximum loads, a significant
amount of heat will be generated and this heat must be
conducted away from the case. To maintain the case tem-
perature at or below the specified maximum of 125°C, this
heat must be transferred by conduction to an appropriate
heat dissipater held in intimate contact with the converter
base-plate.
∆T = 85 - 25 = 60°C
From the Specification Table, the worst case full load effi-
ciency for this device is 83%; therefore the power dissipa-
tion at full load is given by
1
(
)
P
120
1
120 0.205 24.6W
=
•
−
=
•
=
.83
and the required heat sink area is
−1.43
60
− 3.0 = 71 in2
Because effectiveness of this heat transfer is dependent
on the intimacy of the baseplate/heatsink interface, it is st-
rongly recommended that a high thermal conductivity heat
transferance medium is inserted between the baseplate a-
nd heatsink. The material most frequently utilized at the fa-
ctory during all testing and burn-in processes is sold under
A
HEAT SINK
=
80• 24.60.85
Thus, a total heat sink surface area (including fins, if any) of
2
71 in in this example, would limit case rise to 60°C above
ambient. A flat aluminum plate, 0.25" thick and of approxi-
1
the trade name of Sil-Pad 400 . This particular pro duct
2
mate dimension 4" by 9" (36 in per side) would suffice for
is an insulator but electrically conductive versions are also
available. Use of these materials assures maximum surfa-
ce contact with the heat dissipator thereby compensating
this application in a still air environment. Note that to meet
the criteria in this example, both sides of the plate require
unrestricted exposure to the ambient air.
1
Sil-Pad is a registered Trade Mark of Bergquist, Minneapolis, MN
6
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AFL1203R3S
Input Filter
Finding a resistor value for a particular output voltage, is
simply a matter of substituting the desired output voltage
and the nominal device voltage into the equation and solv-
The AFL120XXS series converters incorporate a LC input
filter whose elements dominate the input load impedance
characteristic at turn-on. The input circuit is as shown in
Figure IV.
ing for the corresponding resistor value.
Figure V. Connection for VOUT Adjustment
Figure IV. Input Filter Circuit
Enable
2
16.8uH
Share
Sense
Sense
Return
R ADJ
Pin 1
+
-
AFL120xxS
0.78uF
To Load
+
Vout
Pin 2
Caution: Do not set Radj < 500Ω
Attempts to adjust the output voltage to a value greater than
120% of nominal should be avoided because of the poten-
tial of exceeding internal component stress ratings and sub-
sequent operation to failure. Under no circumstance should
the external setting resistor be made less than 500Ω. By
remaining within this specified range of values, completely
safe operation fully within normal component derating limits
is assured.
Undervoltage Lockout
A minimum voltage is required at the input of the converter
to initiate operation. This voltage is set to 74 ± 4 volts. To
preclude the possibility of noise or other variations at the
input falsely initiating and halting converter operation, a hys-
teresis of approximately 7 volts is incorporated in this cir-
cuit. Thus if the input voltage droops to 67 ± 4 volts, the
converter will shut down and remain inoperative until the
input voltage returns to ≈ 74 volts.
Examination of the equation relating output voltage and re-
sistor value reveals a special benefit of the circuit topology
utilized for remote sensing of output voltage in the
AFL120XXS series of converters. It is apparent that as the
resistance increases, the output voltage approaches the
nominal set value of the device. In fact the calculated limit-
ing value of output voltage as the adjusting resistor be-
OutputVoltage Adjust
In addition to permitting close voltage regulation of remotely
located loads, it is possible to utilize the converter sense
pins to incrementally increase the output voltage over a
limited range.The adjustments made possible by this method
are intended as a means to “trim” the output to a voltage
setting for some particular application, but are not intended
to create an adjustable output converter. These output volt-
age setting variations are obtained by connecting an appro-
priate resistor value between the +sense and -sense pins
while connecting the -sense pin to the output return pin as
shown in Figure V. below. The range of adjustment and
corresponding range of resistance values can be deter-
comes very large is ≈ 25mV above nominal device voltage.
The consequence is that if the +sense connection is unin-
tentionally broken, an AFL120XXS has a fail-safe output
voltage of Vout + 25mV, where the 25mV is independent of
the nominal output voltage. It can be further demonstrated
that in the event of both the + and - sense connections
being broken, the output will be limited toVout + 440mV. This
440 mV is also essentially constant independent of the nomi-
nal output voltage. While operation in this condition is not
damaging to the device, not at all performance parameters
will be met.
mined by use of the following equation.
NOM
V
adj
R
= 100•
OUT
NOM
V
- V
-.025
Where VNOM = device nominal output voltage, and
VOUT = desired output voltage
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7
AFL1203R3S
AFL1203R3S Case Outlines
Case X
Case W
Pin Variation of Case Y
3.000
2.760
ø
0.128
0.050
0.050
0.250
0.250
1.000
1.000
Ref
1.260 1.500
0.200 Typ
Non-cum
Pin
ø
0.040
Pin
0.040
0.220
ø
2.500
0.220
0.525
2.800
2.975 max
0.238 max
0.42
0.380
Max
0.380
Max
Case Y
Case Z
Pin Variation of Case Y
1.150
0.300
ø
0.140
0.25 typ
0.050
0.050
0.250
0.250
1.000
Ref
1.500 1.750 2.00
1.000
Ref
0.200 Typ
Non-cum
Pin
ø
0.040
Pin
ø
0.040
0.220
0.220
1.750
2.500
0.375
0.36
2.800
2.975 max
0.525
0.238 max
0.380
Max
0.380
Max
Tolerances, unless otherwise specified: .XX
.XXX
=
=
±0.010
±0.005
BERYLLIAWARNING: These converters are hermetically sealed;however they contain BeO substrates and should not be ground or subjected to any other
operations including exposure to acids, which may produce Beryllium dust or fumes containing Beryllium
8
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AFL1203R3S
Available Screening Levels and ProcessVariations for AFL1203R3S Series.
MIL-STD-883
Method
No
ES
HB
CH
Requirement
Temperature Range
Element Evaluation
Internal Visual
Suffix
Suffix
Suffix
Suffix
-20 to +85°C
-55°C to +125°C
-55°C to +125°C
-55°C to +125°C
MIL-PRF-38534
ü
2017
1010
2001
1015
¬
ü
Cond B
ü
Temperature Cycle
Constant Acceleration
Burn-in
Cond C
Cond C
500g
Cond A
Cond A
48hrs @ 85°C
48hrs @ 125°C
25°C
160hrs @ 125°C
-55, +25, +125°C
160hrs @ 125°C
-55, +25, +125°C
Final Electrical (Group A)
MIL-PRF-38534
& Specification
25°C
Seal, Fine & Gross
External Visual
1014
2009
Cond C
Cond A, C
Cond A, C
Cond A, C
¬
ü
ü
ü
* per Commercial Standards
AFL1203R3S Pin Designation
Part Numbering
AFL 120 3R3 S X / CH
Pin No.
Designation
Positive Input
Input Return
Case
1
2
M odel
Screening
–
,
E S
Input Voltage
C ase Style
H B, CH
120 = 120V
28 = 28V
W , X, Y, Z
3
Output Voltage
Outputs
S = Single
D = D ual
4
Enable 1
3R3 = 3.3V
5
Sync Output
Sync Input
Positive Output
Output Return
Return Sense
Positive Sense
Share
6
7
8
9
10
11
12
Enable 2
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. 07/02
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9
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AFL1203R3SWPBF | INFINEON | DC-DC Regulated Power Supply Module, 1 Output, 66W, Hybrid, 0.380 INCH, LOW PROFILE, SEAM WELDED PACKAGE-12 | 获取价格 | |
AFL1203R3SX | INFINEON | Switching Regulator/Controller, 20A, 600kHz Switching Freq-Max, Hybrid | 获取价格 | |
AFL1203R3SX-CH | INFINEON | ADVANCED ANALOG HIGH RELIABILITY HYBRID DC/DC CONVERTERS | 获取价格 | |
AFL1203R3SX-ES | INFINEON | ADVANCED ANALOG HIGH RELIABILITY HYBRID DC/DC CONVERTERS | 获取价格 | |
AFL1203R3SX-HB | INFINEON | ADVANCED ANALOG HIGH RELIABILITY HYBRID DC/DC CONVERTERS | 获取价格 | |
AFL1203R3SX/CH | INFINEON | DC-DC Regulated Power Supply Module, 1 Output, 66W, Hybrid, 0.380 INCH, LOW PROFILE, SEAM WELDED PACKAGE-12 | 获取价格 |
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