IRF AFL2808DZ-HB Advanced analog high reliability hybrid dc/dc converter Datasheet

PD - 94457A
AFL50XXS SERIES
50V Input, Single Output
ADVANCED ANALOG
HIGH RELIABILITY
HYBRID DC/DC CONVERTERS
Description
The AFL Series of DC/DC converters feature high power
density with no derating over the full military temperature range. This series is offered as part of a complete
family of converters providing single and dual output
voltages and operating from nominal +28, +50, +120 or
+270 volt inputs with output power ranging from 80 to
120 watts. For applications requiring higher output
power, individual converters can be operated in parallel. The internal current sharing circuits assure equal
current distribution among the paralleled converters. This
series incorporates 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 converters 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, softstart and load fault protection are provided on all models.
These converters are hermetically packaged in two enclosure variations, utilizing copper core pins to minimize resistive DC losses. Three lead styles are available, each fabricated with Advanced Analog’s rugged
ceramic lead-to-package seal assuring long term
hermeticity in the most harsh environments.
Manufactured in a facility fully qualified to MIL-PRF38534, 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-H38534 for class H. The HB grade is fully processed and
screened to the class H requirement, may not necessarily meet all of the other MIL-PRF-38534 requirements,
e.g., element evaluation and Periodic Inspection (P.I.)
not required. Both grades are tested to meet the complete group “A” test specification over the full military
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AFL
Features
n 30 To 80 Volt Input Range
n 3.3, 5, 8, 9 12, 15, 24 and 28 Volts Outputs
Available
n High Power Density - up to 84 W / in3
n Up To 120 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 85%
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 > 40 dB - DC to 50KHz
n External Synchronization Port
n Fault Tolerant Design
n Dual Output Versions Available
n Standard Military Drawings Available
temperature range without output power deration.
Two grades with more limited screening are also
available for use in less demanding applications.
Variations in electrical, mechanical and screening can be accommodated. Contact Advanced
Analog for special requirements.
1
07/09/02
AFL50XXS Series
Specifications
ABSOLUTE MAXIMUM RATINGS
Input Voltage
-0.5V to 100V
Soldering Temperature
300°C for 10 seconds
Case Temperature
Operating
Storage
-55°C to +125°C
-65°C to +135°C
Static Characteristics -55°C < TCASE < +125°C, 30V< VIN < 80V unless otherwise specified.
Group A
Subgroups
Parameter
Test Conditions
Note 6
INPUT VOLTAGE
Min
Nom
Max
Unit
30
50
80
V
5.00
8.00
9.00
12.00
15.00
28.00
5.05
8.08
9.09
12.12
15.15
28.28
V
V
V
V
V
V
5.10
8.16
9.18
12.24
15.30
28.56
V
V
V
V
V
V
16.0
10.0
10.0
9.0
8.0
4.0
A
A
A
A
A
A
80
80
90
108
120
112
W
W
W
W
W
W
VIN = 50 Volts, 100% Load
OUTPUT VOLTAGE
AFL5005S
AFL5008S
AFL5009S
AFL5012S
AFL5015S
AFL5028S
1
1
1
1
1
1
4.95
7.92
8.91
11.88
14.85
27.72
AFL5005S
AFL5008S
AFL5009S
AFL5012S
AFL5015S
AFL5028S
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
4.90
7.84
8.82
11.76
14.70
27.44
VIN = 30, 50, 80 Volts - Note 6
OUTPUT CURRENT
AFL5005S
AFL5008S
AFL5009S
AFL5012S
AFL5015S
AFL5028S
Note 6
OUTPUT POWER
AFL5005S
AFL5008S
AFL5009S
AFL5012S
AFL5015S
AFL5028S
µfd
MAXIMUM CAPACITIVE LOAD
Note 1
10,000
OUTPUT VOLTAGE
TEMPERATURE COEFFICIENT
VIN = 50 Volts, 100% Load - Note 1, 6
-0.015
+0.015
%/°C
No Load, 50% Load, 100% Load
VIN = 30, 50, 80 Volts
-70.0
-20.0
+70.0
+20.0
mV
mV
-1.0
+1.0
%
30
40
40
45
50
100
mVpp
mVpp
mVpp
mVpp
mVpp
mVpp
OUTPUT VOLTAGE REGULATION
AFL5028S
Line
All Others
Line
Load
OUTPUT RIPPLE VOLTAGE
AFL5005S
AFL5008S
AFL5009S
AFL5012S
AFL5015S
AFL5028S
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
VIN = 30, 50, 80 Volts, 100% Load,
BW = 10MHz
For Notes to Specifications, refer to page 4
2
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AFL50XXS Series
Static Characteristics (Continued)
Parameter
Group A
Subgroups
INPUT CURRENT
No Load
Inhibit 1
Inhibit 2
INPUT RIPPLE CURRENT
AFL5005S
AFL5008S
AFL5009S
AFL5012S
AFL5015S
AFL5028S
CURRENT LIMIT POINT
As a percentage of full rated load
LOAD FAULT POWER DISSIPATION
Overload or Short Circuit
1
2, 3
1, 2, 3
1, 2, 3
Min
Nom
VIN = 50 Volts
IOUT = 0
Pin 4 Shorted to Pin 2
Pin 12 Shorted to Pin 8
Max
Unit
50
60
5
5
mA
mA
mA
mA
VIN = 50 Volts, 100% Load, BW = 10MHz
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1
2
3
VOUT = 90% VNOM , VIN = 50 Volts
Note 5
115
105
125
60
60
60
60
60
60
mApp
mApp
mApp
mApp
mApp
mApp
125
115
140
%
%
%
32
W
VIN = 50 Volts
1, 2, 3
VIN = 50 Volts, 100% Load
EFFICIENCY
AFL5005S
AFL5008S
AFL5009S
AFL5012S
AFL5015S
AFL5028S
ENABLE INPUTS (Inhibit Function)
Converter Off
Sink Current
Converter On
Sink Current
SWITCHING FREQUENCY
SYNCHRONIZATION INPUT
Frequency Range
Pulse Amplitude, Hi
Pulse Amplitude, Lo
Pulse Rise Time
Pulse Duty Cycle
ISOLATION
Test Conditions
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
78
79
80
81
82
82
Logical Low on Pin 4 or Pin 12
Note 1
Logical High on Pin 4 and Pin 12 - Note 9
Note 1
-0.5
2.0
1, 2, 3
500
1, 2, 3
1, 2, 3
1, 2, 3
500
2.0
-0.5
Note 1
Note 1
1
Input to Output or Any Pin to Case
(except Pin 3). Test @ 500VDC
DEVICE WEIGHT
Slight Variations with Case Style
MTBF
MIL-HDBK-217F, AIF @ TC = 40°C
550
20
100
0.8
100
50
100
V
µA
V
µA
600
KHz
700
10
0.8
100
80
KHz
V
V
nSec
%
MΩ
85
300
%
%
%
%
%
%
81
82
83
84
85
84
gms
KHrs
For Notes to Specifications, refer to page 4
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3
AFL50XXS Series
Dynamic Characteristics -55°C < TCASE < +125°C, VIN=50V unless otherwise specified.
Parameter
Group A
Subgroups
AFL5008S
AFL5009S
AFL5012S
AFL5015S
AFL5028S
Min
Nom
Max
Unit
Note 2, 8
LOAD TRANSIENT RESPONSE
AFL5005S
Test Conditions
Amplitude
Recovery
4, 5, 6
4, 5, 6
Load Step 50% ⇔ 100%
-450
450
200
mV
µSec
Amplitude
Recovery
4, 5, 6
4, 5, 6
Load Step 10% ⇔ 50%
-450
450
300
mV
µSec
Amplitude
Recovery
4, 5, 6
4, 5, 6
Load Step 50% ⇔ 100%
-500
500
200
mV
µSec
Amplitude
Recovery
4, 5, 6
4, 5, 6
Load Step 10% ⇔ 50%
-500
500
300
mV
µSec
Amplitude
Recovery
4, 5, 6
4, 5, 6
Load Step 50% ⇔ 100%
-600
600
200
mV
µSec
Amplitude
Recovery
4, 5, 6
4, 5, 6
Load Step 10% ⇔ 50%
-600
600
300
mV
µSec
Amplitude
Recovery
4, 5, 6
4, 5, 6
Load Step 50% ⇔ 100%
-750
750
200
mV
µSec
Amplitude
Recovery
4, 5, 6
4, 5, 6
Load Step 10% ⇔ 50%
-750
750
300
mV
µSec
Amplitude
Recovery
4, 5, 6
4, 5, 6
Load Step 50% ⇔ 100%
-750
750
200
mV
µSec
Amplitude
Recovery
4, 5, 6
4, 5, 6
Load Step 10% ⇔ 50%
-750
750
300
mV
µSec
Amplitude
Recovery
4, 5, 6
4, 5, 6
Load Step 50% ⇔ 100%
-1200
1200
200
mV
µSec
Amplitude
Recovery
4, 5, 6
4, 5, 6
Load Step 10% ⇔ 50%
-1200
1200
300
mV
µSec
-500
500
500
mV
µSec
250
120
mV
mSec
Note 1, 2, 3
LINE TRANSIENT RESPONSE
VIN Step = 30 ⇔ 80 Volts
Amplitude
Recovery
VIN = 30, 50, 80 Volts. Note 4
TURN-ON CHARACTERISTICS
Overshoot
Delay
4, 5, 6
4, 5, 6
Enable 1, 2 on. (Pins 4, 12 high or
open)
LOAD FAULT RECOVERY
Same as Turn On Characteristics.
LINE REJECTION
MIL-STD-461D, CS101, 30Hz to 50KHz
Note 1
50
75
40
50
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.
4
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AFL50XXS Series
AFL50XXS Circuit Description
Figure I. AFL Single Output Block Diagram
DC Input 1
Enable 1
Input
Filter
4
Output
Filter
Primary
Bias Supply
7
+Output
10
+Sense
11
Share
Current
Sense
Sync Output
5
Sync Input
6
Case
3
Input Return
2
Control
FB
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
converter to life. A power MOSFET is used to chop the DC
input voltage into a high frequency square wave, applying
this chopped voltage to the power transformer at the nominal converter switching frequency. Maintaining a DC voltage within the specified operating range at the input assures continuous generation of the primary bias voltage.
The switched voltage impressed on the secondary output
transformer winding is rectified and filtered to generate the
converter DC output voltage. An error amplifier on the secondary side compares the output voltage to a precision
reference and generates an error signal proportional to the
difference. 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 signal
driving the MOSFET, narrowing the width if the output voltage is too high and widening it if it is too low, thereby regulating the output voltage.
Error
Amp
& Ref
Share
Amplifier
12 Enable 2
Sense
Amplifier
Output Return
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 isolation
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 converter down.
Figure II. Enable Input Equivalent Circuit
+5.6 V
100K
Pin 4 o r
Pin 12
1N 4 148
290K
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-Sense
of application. When the remote sensing feature is not used,
the sense lead should be connected to their respective
output terminals at the converter. Figure III. illustrates a
typical remotely sensed application.
Remote Sensing
Connection of the + and - sense leads at a remotely located
load permits compensation for excessive resistance between the converter output and the load when their physical
separation could cause undesirable voltage drop. This connection allows regulation to the placard voltage at the point
9
8
D isable
2N 3 904
180K
Pin 2 o r
Pin 8
5
AFL50XXS Series
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 secondary 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).
level of +2.0 volts. The sync output of another converter
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 open (unconnected )thereby permitting the converter to operate at its’ own internally set
frequency.
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 converter is not inhibited. This output has adequate drive reserve to synchronize at least five additional converters.
A typical connection is illustrated in Figure III.
When operating multiple converters, system requirements
often dictate operation of the converters at a common frequency. To accommodate this requirement, the AFL series
converters provide both a synchronization input and output.
The sync input port permits synchronization of an AFL converter to any compatible external frequency source operating 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 an
100 ns, maximum low level of +0.8 volts and a minimum high
Figure III. Preferred Connection for Parallel Operation
Power
Input
1
12
Vin
Enable 2
Rtn
Share
Case
Enable 1
Optional
Synchronization
Connection
AFL
+ Sense
- Sense
Sync Out
Return
Sync In
+ Vout
6
7
1
12
Share Bus
Enable 2
Vin
Share
Rtn
Case
Enable 1
AFL
+ Sense
- Sense
Sync Out
Return
Sync In
+ Vout
to Load
7
6
1
12
Vin
Enable 2
Rtn
Share
Case
Enable 1
AFL
+ Sense
- Sense
Sync Out
Return
Sync In
+ Vout
7
6
(Other Converters)
Parallel Operation-Current and Stress Sharing
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
among the members of a set whose load current exceeds
the capacity of an individual AFL. An important feaure of the
6
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 temperature, the current it
provides to the load will be reduced as compensation for
the temperature induced stress on that device.
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AFL50XXS Series
When operating in the shared mode, it is important that
symmetry of connection be maintained as an assurance of
optimum load sharing performance. Thus, converter outputs should be connected to the load with equal lengths of
wire of the same gauge and sense leads from each converter 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 outputs and return pins connected at a star point which is
located close as possible to the load.
As a consequence of the topology utilized in the current
sharing circuit, the share pin may be used for other functions. In applications requiring only a single converter, the
voltage 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.
Thermal Considerations
Because of the incorporation of many innovative technological 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 effective methods of heat removal from the die junctions. This
requirement has been effectively addressed inside the device; 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 temperature 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.
Since the effectiveness of this heat transfer is dependent
on the intimacy of the baseplate/heatsink interface, it is
strongly recommended that a high thermal conductivity heat
transferring medium is inserted between the baseplate and
heatsink. The material most frequently utilized at the factory during all testing and burn-in processes is sold under
the trade name of Sil-Pad 4001 . This particular product is
an insulator but electrically conductive versions are also
available. Use of these materials assures maximum surface contact with the heat dissipater thereby compensating
for any minor surface variations. While other available types
of heat conductive materials and thermal compounds provide similar effectiveness, these alternatives are often less
convenient and can be somewhat messy to use.
A conservative aid to estimating the total heat sink surface
area (AHEAT SINK) required to set the maximum case temperature rise (∆T) above ambient temperature is given by
the following expression:
.
 ∆T −143

− 3.0
A HEAT SINK ≈ 
 80P 0.85 
where
∆T = Case temperature rise above ambient
 1

P = Device dissipation in Watts = POUT 
− 1
 Eff

As an example, it is desired to maintain the case temperature of an AFL5015S at ≤ +85°C while operating in an open
area whose ambient temperature is held at a constant +25°C;
then
∆T = 85 - 25 = 60°C
If the worst case full load efficiency for this device is 83%;
then the power dissipation at full load is given by

 1
P = 120 • 
− 1 = 120 • ( 0.205) = 24.6 W
.
83


and the required heat sink area is
.
 −143

60

− 3.0 = 71 in 2
A HEAT SINK = 
 80 • 24.6 0.85 
Thus, a total heat sink surface area (including fins, if any) of
71 in2 in this example, would limit case rise to 60°C above
ambient. A flat aluminum plate, 0.25" thick and of approximate dimension 4" by 9" (36 in2 per side) would suffice for
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.
1Sil-Pad is a registered Trade Mark of Bergquist, Minneapolis, MN
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7
AFL50XXS Series
Input Filter
The AFL50XXS 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.
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 solving for the corresponding resistor value.
Figure V. Connection for VOUT Adjustment
Figure IV. Input Filter Circuit
Enable 2
0.75µ H
Share
P in 1
AFL50xxS
R ADJ
+ Sense
- Sense
2.7µ fd
Return
To Load
+ Vout
P in 2
Note: Radj must be set ≥ 500Ω
Undervoltage Lockout
A minimum voltage is required at the input of the converter
to initiate operation. This voltage is set to 26.5 ± 1.5 volts. To
preclude the possibility of noise or other variations at the
input falsely initiating and halting converter operation, a hysteresis of approximately 2 volts is incorporated in this circuit. Thus if the input voltage droops to 24.5 ± 1.5 volts, the
converter will shut down and remain inoperative until the
input voltage returns to ≈ 25 volts.
Output Voltage 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
voltage setting variations are obtained by connecting an
appropriate 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 determined by use of the following equation.
Attempts to adjust the output voltage to a value greater than
120% of nominal should be avoided because of the potential of exceeding internal component stress ratings and
subsequent operation to failure. Under no circumstance
should the external setting resistor be made less than 500W.
By remaining within this specified range of values, completely safe operation fully within normal component derating limits is assured.
Examination of the equation relating output voltage and resistor value reveals a special benefit of the circuit topology
utilized for remote sensing of output voltage in the AFL50XXS
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 limiting value of
output voltage as the adjusting resistor becomes very large
is ≈ 25mV above nominal device voltage.
The consequence is that if the +sense connection is unintentionally broken, an AFL50XXS 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 to Vout + 440mV. This 440
mV is also essentially constant independent of the nominal
output voltage.


VNOM

Radj = 100 • 
VOUT - VNOM -.025 
Where
VNOM = device nominal output voltage, and
VOUT = desired output voltage
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AFL50XXS Series
Table 1. Nominal Resistance of Cu Wire
General Application Information
The AFL50XXS series of converters are capable of providing large transient currents to user loads on demand.
Because the nominal input voltage range in this series is
relatively low, the resulting input current demands will be
correspondingly large. It is important therefore, that the line
impedance be kept very low to prevent steady state and
transient input currents from degrading the supply voltage
between the voltage source and the converter input. In
applications requiring high static currents and large transients, it is recommended that the input leads be made of
adequate size to minimize resistive losses, and that a good
quality capacitor of approximately100µfd be connected directly across the input terminals to assure an adequately
low impedance at the input terminals. Table I relates nominal resistance values and selected wire sizes.
Wire Size, AWG
Resistance per ft
24 Ga
25.7 mΩ
22 Ga
16.2 mΩ
20 Ga
10.1 mΩ
18 Ga
6.4 mΩ
16 Ga
4.0 mΩ
14 Ga
2.5 mΩ
12 Ga
1.6 mΩ
Incorporation of a 100 µfd capacitor at the input terminals
is recommended as compensation for the dynamic effects of the parasitic resistance of the input cable reacting
with the complex impedance of the converter input, and to
provide an energy reservoir for transient input current
requirements.
Figure VI. Problems of Parasitic Resistance in input Leads
(See text)
Rp
I in
Vin
100
µfd
e source
Rp
I Rtn
e Rtn
Rtn
Case
System Ground
Enable 1
Sync Out
Sync In
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9
AFL50XXS Series
AFL50XXS Case Outlines
Case X
Case W
Pin Variation of Case Y
3.000
ø 0.128
2.760
0.050
0.050
1
12
0.250
0.250
1.260 1.500
0.200 Typ
Non-cum
6
7
1.000
Ref
1.000
Pin
ø 0.040
Pin
ø 0.040
0.220
2.500
0.220
2.800
2.975 max
0.525
0.238 max
0.42
0.380
Max
0.380
Max
Case Y
Case Z
Pin Variation of Case Y
0.300
1.150
ø 0.140
0.25 typ
0.050
0.050
1
12
0.250
0.250
1.500 1.750 2.00
1.000
Ref
0.200 Typ
Non-cum
6
7
1.000
Ref
Pin
ø 0.040
Pin
ø 0.040
1.750
0.375
0.220
0.220
0.36
2.500
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
BERYLLIA WARNING: 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
10
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AFL50XXS Series
Available Screening Levels and Process Variations for AFL50XXS Series.
MIL-STD-883
Method
Requirement
Temperature Range
No
Suffix
ES
Suffix
HB
Suffix
CH
Suffix
-20°C to +85°C
-55°C to +125°C
-55°C to +125°C
-55°C to +125°C
Element Evaluation
MIL-PRF-38534
¬
Internal Visual
2017
Yes
Yes
Yes
Temperature Cycle
1010
Cond B
Cond C
Cond C
Constant Acceleration
2001,
500g
Cond A
Cond A
Burn-in
1015
48hrs @ 85°C
48hrs @ 125°C
160hrs @ 125°C
160hrs @ 125°C
MIL-PRF-38534
25°C
25°C
-55, +25, +125°C
-55, +25, +125°C
Seal, Fine & Gross
1014
¬
Cond A, C
Cond A, C
Cond A, C
External Visual
2009
¬
Yes
Yes
Yes
Final Electrical (Group A)
* per Commercial Standards
AFL50XXS Pin Designation
Pin No.
Designation
1
Positive Input
2
Input Return
3
Case
4
Enable 1
5
Sync Output
6
Sync Input
7
Positive Output
8
Output Return
9
Return Sense
10
Positive Sense
11
Share
12
Enable 2
Part Numbering
AFL 50 05 S X / CH
Mode
Input
28= 28 V, 50= 50 V
120=120 V, 270= 270 V
Output
3R3= 3.3 V, 05= 5 V
08= 8 V, 09= 9 V
12= 12 V, 15= 15 V
24= 24 V, 28= 28 V
Screenin
–
Case
, ES
HB, CH
W, X, Y, Z
Output
S = Single
D = Dual
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
www.irf.com
11
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