|
|
PDF AFL12012D Data sheet ( Hoja de datos )
| Número de pieza | AFL12012D | |
| Descripción | HYBRID-HIGH RELIABILITY DC/DC CONVERTER | |
| Fabricantes | International Rectifier | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AFL12012D (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
|
No Preview Available !
PD - 94463C
HYBRID-HIGH RELIABILITY
DC/DC CONVERTER
AFL120XXD SERIES
120V Input, Dual 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 80V To 160V Input Range
n
n
±5V,
High
±12V, and ±15V
Power Density -
Outputs Available
up to 70W/in3
n Up To 100W 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 87%
n Full Military Temperature Range
n Continuous Short Circuit and Overload
Protection
n Output Voltage Trim
n Primary and Secondary Referenced
Inhibit Functions
n Line Rejection > 50dB - DC to 50KHz
n External Synchronization Port
n Fault Tolerant Design
n Single 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
12/15/06
Free Datasheet http://www.Datasheet4U.com
1 page  
Block Diagram
Figure I. AFL Dual Output
AFL120XXD Series
+ INPUT 1
INPUT
FILTER
OUTPUT
FILTER
7 + OUTPUT
ENABLE 1 4
PRIMARY
BIAS SUPPLY
CURRENT
SENSE
8 OUTPUT RETURN
SYNC OUTPUT 5
SYNC INPUT 6
CASE 3
INPUT RETURN 2
CONTROL
FB
ERROR
AMP
& REF
OUTPUT
FILTER
SHARE
AMPLIFIER
9 - OUTPUT
11 SHARE
12 ENABLE 2
10 OUTPUT
VOLTAGE TRIM
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 pins 4 and 12 are 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. 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 switching 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 excluded from the bias voltage
generator and the primary bias voltage becomes internally
generated.
The switched voltage impressed on the secondary output
transformer windings is rectified and filtered to provide the
positive and negative converter output voltages. An error
amplifier on the secondary side compares the positive 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 control section of the converter varying the pulse width
of the square wave signal driving the MOSFETs, narrowing
the pulse width if the output voltage is too high and widening
it if it is too low. These pulse width variations provide the
necessary corrections to regulate the magnitude of output
voltage within its’ specified limits.
Because the primary portion of the circuit is coupled to the
secondary side with magnetic elements, full isolation from
input to output is maintained.
Although incorporating several sophisticated and useful
ancilliary features, basic operation of the AFL120XXDseries
can be initiated by simply applying an input voltage to pins 1
and 2 and connecting the appropriate loads between pins 7,
8, and 9. Of course, operation of any converter with high
power density should not be attempted before secure
attachment to an appropriate heat dissipator. (See Thermal
Considerations, page 7)
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
Pin 4 or
Pin 12
1N4148
100K
290K
Disable
2N3904
Pin 2 or
Pin 8
150K
www.irf.com
5
Free Datasheet http://www.Datasheet4U.com
5 Page 
AFL120XXD Series
Device Screening
Requirement MIL-STD-883 Method No Suffix
ES d
HB
CH
Temperature Range
e-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
N/A
N/A
N/A Class H
Non-Destructive
Bond Pull
Internal Visual
2023
2017
N/A N/A
c Yes
N/A N/A
Yes Yes
Temperature Cycle
1010
N/A
Cond B
Cond C
Cond C
Constant Acceleration
2001, Y1 Axis
N/A
500 Gs
3000 Gs
3000 Gs
PIND
2020
N/A N/A
N/A N/A
Burn-In
Final Electrical
1015
MIL-PRF-38534
N/A
25°C
48 hrs@hi temp 160 hrs@125°C 160 hrs@125°C
d25°C
-55°C, +25°C, -55°C, +25°C,
( Group A )
& Specification
+125°C
+125°C
PDA
MIL-PRF-38534
N/A
N/A
N/A 10%
Seal, Fine and Gross
1014
Cond A
Cond A, C
Cond A, C
Cond A, C
Radiographic
External Visual
2012
2009
N/A N/A
c Yes
N/A N/A
Yes Yes
Notes:
Best commercial practice
Sample tests at low and high temperatures
-55°C to +105°C for AHE, ATO, ATW
Model
Part Numbering
AFL 120 05 D X /CH
Input Voltage
28 = 28V
50 = 50V
120 = 120V
270 = 270V
Output Voltage
05 = ±5V
12 = ±12V
15 = ±15V
Screening Level
(Please refer to Screening Table)
No suffix, ES, HB, CH
Case Style
W, X, Y, Z
Output
D = Dual
www.irf.com
WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 322 3331
IR SANTA CLARA: 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. 12/2006
11
Free Datasheet http://www.Datasheet4U.com
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet AFL12012D.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AFL12012D | HYBRID-HIGH RELIABILITY DC/DC CONVERTER | International Rectifier |
| AFL12012D | HYBRID-HIGH RELIABILITY DC/DC CONVERTER | International Rectifier |
| AFL12012S | HIGH RELIABILITY HYBRID DC/DC CONVERTERS | International Rectifier |
| AFL12012S | HIGH RELIABILITY HYBRID DC/DC CONVERTERS | International Rectifier |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |