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International Rectifier Electronic Components Datasheet



AFL28xxS

HYBRID-HIGH RELIABILITY DC/DC CONVERTER



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PD-94460C
HYBRID-HIGH RELIABILITY
DC/DC CONVERTER
AFL28XXS SERIES
28V Input, Single Output
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 or
+270V inputs with output power ranging from 80W to
120W. 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 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.
AFL
Features
n 16V To 40V Input Range
n 5V, 7V, 8V, 9V,12V,15V and 28V Outputs
Available
n High Power Density - up to 84W/in3
n Up To 120W Output Power
n Parallel Operation with Power 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 Primary and Secondary Referenced
Inhibit Functions
n Line Rejection > 40dB - DC to 50KHz
n External Synchronization Port
n Fault Tolerant Design
n Dual Output Versions Available
n Standard Microcircuit Drawings Available
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.
www.irf.com
1
12/18/06



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AFL28xxS pdf
AFL28XXS Series
Specifications
Absolute Maximum Ratings
Input voltage
Soldering temperature
Operating case temperature
Storage case temperature
-0.5V to +50VDC
300°C for 10 seconds
-55°C to +125°C
-65°C to +135°C
Static Characteristics -55°C < TCASE < +125°C, 16V< VIN < 40V unless otherwise specified.
Parameter
Group A
Subgroups
Test Conditions
Min Nom Max Unit
INPUT VOLTAGE
Note 6
16 28 40
V
OUTPUT VOLTAGE
AFL2805S
AFL2807S
AFL2808S
AFL2809S
AFL2812S
AFL2815S
AFL2828S
AFL2805S
AFL2807S
AFL2808S
AFL2809S
AFL2812S
AFL2815S
AFL2828S
VIN = 28 Volts, 100% Load
1
1
1
1
1
1
1
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
4.95
6.93
7.92
8.91
11.88
14.85
27.72
4.90
6.86
7.84
8.82
11.76
14.70
27.44
5.00
7.00
8.00
9.00
12.00
15.00
28.00
5.05
7.07
8.08
9.09
12.12
15.15
28.28
5.10
7.17
8.16
9.18
12.24
15.30
28.56
V
OUTPUT CURRENT
AFL2805S
AFL2807S
AFL2808S
AFL2809S
AFL2812S
AFL2815S
AFL2828S
OUTPUT POWER
AFL2805S
AFL2807S
AFL2808S
AFL2809S
AFL2812S
AFL2815S
AFL2828S
MAXIMUM CAPACITIVE LOAD
VIN = 16, 28, 40 Volts - Note 6
Note 6
Note 1
10,000
16
11.4
10
10
9.0
8.0
4.0
80
80
80
90
108
120
112
A
W
µF
OUTPUT VOLTAGE
TEMPERATURE COEFFICIENT
VIN = 28 Volts, 100% Load - Note 1, 6 -0.015
+0.015 %/°C
OUTPUT VOLTAGE REGULATION
AFL2828S
Line
All Others
Line
Load
1, 2, 3
1, 2, 3
1, 2, 3
No Load, 50% Load, 100% Load
VIN = 16, 28, 40 Volts
-70
-20
-1.0
+70
+20
+1.0
mV
mV
%
OUTPUT RIPPLE VOLTAGE
AFL2805S
AFL2807S
AFL2808S
AFL2809S
AFL2812S
AFL2815S
AFL2828S
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
VIN = 16, 28, 40 Volts, 100% Load,
BW = 10MHz
For Notes to Specifications, refer to page 4
2
30
40
40
40 mVpp
45
50
100
www.irf.com



Part Number AFL28xxS
Description HYBRID-HIGH RELIABILITY DC/DC CONVERTER
Maker International Rectifier - International Rectifier
Total Page 12 Pages
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