PD-94447D
AFL120XXS SERIES
120V Input, Single Output
HYBRID-HIGH RELIABILITY
DC/DC CONVERTER
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 +28V, +50V, +120V or +270 V
inputs with output power ranging from 80W to 120W.
For applications requiring higher output power, multiple
converters can be operated in parallel. The internal
current sharing circuits assure equal current distribution
among the paralleled converters. This series incorporates
International Rectifier’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 550KHz. Multiple
converters can be synchronized to a system clock in
the 500KHz to 700KHz 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.
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 International Rectifier’s
rugged ceramic lead-to-package seal assuring long
term hermeticity in the most harsh environments.
Manufactured in a facility fully qualified to MIL-PRF-
38534, these converters are fabricated utilizing DSCC
qualified processes. For available screening options,
refer to device screening table in the data sheet.
Variations in electrical, mechanical and screening can
be accommodated. Contact IR Santa Clara for special
requirements.
AFL
Features
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80V To 160V Input Range
5, 7.5, 8, 9, 12, 15 and 28V Outputs Available
High Power Density - up to 84W/in3
Up To 120W Output Power
Parallel Operation with Stress and Current
Sharing
Low Profile (0.380") Seam Welded Package
Ceramic Feedthru Copper Core Pins
High Efficiency - to 87%
Full Military Temperature Range
Continuous Short Circuit and Overload
Protection
Remote Sensing Terminals
Primary and Secondary Referenced
Inhibit Functions
Line Rejection > 50dB - DC to 50KHz
External Synchronization Port
Fault Tolerant Design
Dual Output Versions Available
Standard Microcircuit Drawings Available
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1
04/30/07
AFL120XXS Series
Specifications
Absolute Maximum Ratings
Input voltage
Soldering temperature
Operating case temperature
Storage case temperature
-0.5V to +180VDC
300°C for 10 seconds
-55°C to +125°C
-65°C to +135°C
Static Characteristics
-55°C < T
CASE
< +125°C, 80V< V
IN
< 160V
unless otherwise specified.
Parameter
INPUT VOLTAGE
OUTPUT VOLTAGE
AFL12005S
AFL12007R5S
AFL12008S
AFL12009S
AFL12012S
AFL12015S
AFL12028S
AFL12005S
AFL12007R5S
AFL12008S
AFL12009S
AFL12012S
AFL12015S
AFL12028S
OUTPUT CURRENT
AFL12005S
AFL12007R5S
AFL12008S
AFL12009S
AFL12012S
AFL12015S
AFL12028S
OUTPUT POWER
AFL12005S
AFL12007R5S
AFL12008S
AFL12009S
AFL12012S
AFL12015S
AFL12028S
MAXIMUM CAPACITIVE LOAD
OUTPUT VOLTAGE
TEMPERATURE COEFFICIENT
OUTPUT VOLTAGE REGULATION
AFL12028S
Line
All Others
Line
Load
OUTPUT RIPPLE VOLTAGE
AFL12005S
AFL12007R5S
AFL12008S
AFL12009S
AFL12012S
AFL12015S
AFL12028S
1, 2, 3
1, 2, 3
1, 2, 3
1,
1,
1,
1,
1,
1,
1,
2,
2,
2,
2,
2,
2,
2,
3
3
3
3
3
3
3
Note 1
V IN = 120 Volts, 100% Load - Notes 1, 6
No Load, 50% Load, 100% Load
V IN = 80, 120, 160 Volts
V IN = 80, 120, 160 Volts, 100% Load,
BW = 10MHz
1
1
1
1
1
1
1
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
Group A
Subgroups
Note 6
V IN = 120 Volts, 100% Load
Test Conditions
Min
80
4.95
7.42
7.92
8.91
11.88
14.85
27.72
4.90
7.35
7.84
8.82
11.76
14.70
27.44
Nom
120
5.00
7.50
8.00
9.00
12.00
15.00
28.00
Max
160
5.05
7.58
8.08
9.09
12.12
15.15
28.28
5.10
7.65
8.16
9.18
12.24
15.30
28.56
Unit
V
V
V IN = 80, 120, 160 Volts - Note 6
16.0
10.67
10.0
10.0
9.0
8.0
4.0
80
80
80
90
108
120
112
10,000
-0.015
+0.015
A
Note 6
W
µF
%/°C
-70
-20
-1.0
+70
+20
+1.0
30
40
40
40
45
50
100
mV
mV
%
mV pp
For Notes to Specifications, refer to page 4
2
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AFL120XXS Series
Static Characteristics
(Continued)
Parameter
INPUT CURRENT
No Load
Inhibit 1
Inhibit 2
INPUT RIPPLE CURRENT
AFL12005S
AFL12007R5S
AFL12008S
AFL12009S
AFL12012S
AFL12015S
AFL12028S
CURRENT LIMIT POINT
As a percentage of full rated load
1
2, 3
1, 2, 3
1, 2, 3
1,
1,
1,
1,
1,
1,
1,
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
1
2
3
1, 2, 3
Group A
Subgroups
Test Conditions
VIN = 120 Volts
IOUT = 0
Pin 4 Shorted to Pin 2
Pin 12 Shorted to Pin 8
VIN = 120 Volts, 100% Load, BW =
10MHz
Min
Nom
Max
20
25
5.0
50
60
60
60
60
60
60
60
115
105
125
125
115
140
32
Unit
mA
mApp
VOUT = 90% VNOM , VIN = 120 Volts
Note 5
%
LOAD FAULT POWER
DISSIPATION
Overload or Short Circuit
EFFICIENCY
AFL12005S
AFL12007R5S
AFL12008S
AFL12009S
AFL12012S
AFL12015S
AFL12028S
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
DEVICE WEIGHT
MTBF
V
IN
= 120 Volts
W
1,
1,
1,
1,
1,
1,
1,
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
V
IN
= 120 Volts, 100% Load
78
79
79
80
82
83
82
-0.5
2.0
500
500
2.0
-0.5
20
100
82
83
73
84
85
87
85
0.8
100
50
100
550
600
700
10
0.8
100
80
%
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
Logical Low on Pin 4 or Pin 12
Note 1
Logical High on Pin 4 and Pin 12 - Note 9
Note 1
V
µA
V
µA
KHz
KHz
V
V
ns
%
MΩ
Note 1
Note 1
Input to Output or Any Pin to Case
(except Pin 3). Test @ 500VDC
Slight Variations with Case Style
MIL-HDBK-217F, AIF @ TC = 70°C
1
85
300
g
KHrs
For Notes to Specifications, refer to page 4
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3
AFL120XXS Series
Dynamic Characteristics
-55°C < T
CASE
< +125°C, V
IN
=120V
unless otherwise specified.
Parameter
LOAD TRANSIENT RESPONSE
AFL12005S
Amplitude
Recovery
Amplitude
Recovery
AFL12007R5S
Amplitude
Recovery
Amplitude
Recovery
AFL12009S
Amplitude
Recovery
Amplitude
Recovery
AFL12012S
Amplitude
Recovery
Amplitude
Recovery
AFL12015S
Amplitude
Recovery
Amplitude
Recovery
AFL12028S
Amplitude
Recovery
Amplitude
Recovery
LINE TRANSIENT RESPONSE
Amplitude
Recovery
TURN-ON CHARACTERISTICS
Overshoot
Delay
LOAD FAULT RECOVERY
LINE REJECTION
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
Group A
Subgroups
Note 2, 8
Load Step 50%
⇔
100%
Load Step 10%
⇔
50%
Load Step 50%
⇔
100%
Load Step 10%
⇔
50%
Load Step 50%
⇔
100%
Load Step 10%
⇔
50%
Load Step 50%
⇔
100%
Load Step 10%
⇔
50%
Load Step 50%
⇔
100%
Load Step 10%
⇔
50%
Load Step 50%
⇔
100%
Load Step 10%
⇔
50%
Note 1, 2, 3
VIN Step = 80
⇔
160 Volts
VIN = 30, 50, 80 Volts. Note 4
Enable 1, 2 on. (Pins 4, 12 high or
open)
Same as Turn On Characteristics.
MIL-STD-461D, CS101, 30Hz to
50KHz
Note 1
60
70
dB
50
75
250
120
mV
ms
-500
500
500
mV
µs
-450
-450
-500
-500
-600
-600
-750
-750
-750
-750
-1200
-1200
450
200
450
300
500
200
500
300
600
200
600
300
750
200
750
300
750
200
750
300
1200
200
1200
300
mV
µs
mV
µs
mV
µs
mV
µs
mV
µs
mV
µs
mV
µs
mV
µs
mV
µs
mV
µs
mV
µs
mV
µs
Test Conditions
Min
Nom
Max
Unit
Notes to Specifications:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Parameters not 100% tested but are guaranteed to the limits specified in the table.
Recovery time is measured from the initiation of the transient to where V OUT has returned to within
±1.0%
of VOUT at 50% load.
Line transient transition time
≥
100µs.
Turn-on delay is measured with an input voltage rise time of between 100V and 500V per millisecond.
Current limit point is that condition of excess load causing output voltage to drop to 90% of nominal.
Parameter verified as part of another test.
All electrical tests are performed with the remote sense leads connected to the output leads at the load.
Load transient transition time
≥
10µs.
Enable inputs internally pulled high. Nominal open circuit voltage
≈
4.0VDC.
4
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AFL120XXS Series
Block Diagram
Figure I. AFL Single Output
+ Input 1
Input
Filter
Primary
Bias Supply
Current
Sense
Sync Output
5
Control
FB
Enable 1 4
Output
Filter
7
10
+Output
+Sense
Sync Input 6
Case
3
Error
Amp
& Ref
Share
Amplifier
Sense
Amplifier
11 Share
12 Enable 2
9
8
Return Sense
Output Return
Input Return 2
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.
output terminals at the converter. Figure III. illustrates a
typical remotely sensed application.
Inhibiting Converter Output (Enable)
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
+5.6V
100K
Pin 4 or
Pin 12
1N4148
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 of application. When the remote sensing feature is
not used, the sense should be connected to their respective
290K
2N3904
150K
Pin 2 or
Pin 8
Disable
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