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International Rectifier Electronic Components Datasheet

AFL27003R3S Datasheet

HIGH RELIABILITY HYBRID DC/DC CONVERTER

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AFL27003R3S pdf
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PD - 94462E
HIGH RELIABILITY
HYBRID DC/DC CONVERTER
AFL27003R3S
270V Input, 3.3V 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 +28 or +270 volt inputs with
output power ranging from 80 to 120 watts. 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 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, 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 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
AFL
Features
n 160 To 400 Volt Input Range
n
n
3.3 Volt Output
High Power Density - 46 W / in3
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%
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 > 60 dB - DC to 50KHz
n External Synchronization Port
n Fault Tolerant Design
n Dual Output Versions Available
n Standard Military Drawings Available
demanding applications. Variations in electrical,
mechanical and screening can be accommodated.
Contact IR Santa Clara for special requirements.
www.irf.com
1
09/01/04


International Rectifier Electronic Components Datasheet

AFL27003R3S Datasheet

HIGH RELIABILITY HYBRID DC/DC CONVERTER

No Preview Available !

AFL27003R3S pdf
AFL27003R3S
Specifications
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Soldering Temperature
Case Temperature
-0.5V to 500V
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, 160V< VIN < 400V unless otherwise specified.
Parameter
Group A
Subgroups
Test Conditions
Min Nom Max
Unit
INPUT VOLTAGE
OUTPUT VOLTAGE
Note 6
VIN = 270 Volts, 100% Load
1
2, 3
160 270 400
3.27 3.30 3.33
3.23
3.37
V
V
V
OUTPUT CURRENT
VIN = 160, 270, 400 Volts, Note 6
20 A
OUTPUT POWER
Note 6
66 W
MAXIMUM CAPACITIVE LOAD
OUTPUT VOLTAGE
TEMPERATURE COEFFICIENT
4 Note 1
10,000
VIN = 270 Volts, 100% Load - Note 1, 6 -0.015
+0.015
µfd
%/°C
OUTPUT VOLTAGE REGULATION
Line
Load
1, 2, 3
1, 2, 3
No Load, 50% Load, 100% Load
VIN = 160, 270, 400 Volts
-10.0
-35.0
+10.0
+35.0
mV
mV
OUTPUT RIPPLE VOLTAGE
1, 2, 3
VIN = 160, 270, 400 Volts, 100% Load,
BW = 10MHz
30 mVpp
INPUT CURRENT
No Load
Inhibit 1
Inhibit 2
1
2, 3
1, 2, 3
1, 2, 3
VIN = 270 Volts
IOUT = 0
Pin 4 Shorted to Pin 2
Pin 12 Shorted to Pin 8
15.0 mA
17.0 mA
3.00 mA
5.00 mA
INPUT RIPPLE CURRENT
CURRENT LIMIT POINT
Expressed as a
Percentage
of Full Rated Load
1, 2, 3
1
2
3
VIN = 270 Volts, 100% Load
B.W. = 10MHz
VOUT = 90% VNOM
Note 5
115
105
125
60 mApp
125 %
115 %
140 %
LOAD FAULT POWER
DISSIPATION
Overload or Short Circuit
1, 2, 3
VIN = 270 Volts
30 W
EFFICIENCY
1, 2, 3
VIN = 270 Volts, 100% Load
72 74
%
SWITCHING FREQUENCY
1, 2, 3
500 550 600
KHz
ISOLATION
1 Input to Output or Any Pin to Case
(except Pin 3). Test @ 500VDC
100
M
MTBF
MIL-HDBK-217F, AIF @ TC = 40°C
For Notes to Specifications, refer to page 3
300
KHrs
2 www.irf.com


Part Number AFL27003R3S
Description HIGH RELIABILITY HYBRID DC/DC CONVERTER
Maker International Rectifier
Total Page 9 Pages
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