http://www.www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf



International Rectifier Electronic Components Datasheet



AHF2812D

Single and Dual Output



No Preview Available !

AHF2812D pdf
www.DataSheet4U.com
PD - 94541
ADVANCED ANALOG
HYBRID-HIGH RELIABILITY
DC/DC CONVERTERS
AHF28XX SERIES
28V Input, Single and Dual Output
Description
The AHF Series of DC/DC converters feature single or
dual outputs over the full military temperature range.
No derating in output power is required, making them
suitable for use in rugged military applications. The low
profile, small outline package is ideally suited to the
tight board space requirements of many industrial and
aerospace applications. Designed for nominal 28Vdc
inputs, this family of converters will meet the require-
ments of MIL-STD-704D. The basic circuit utilizes a
pulse width modulated, feed-forward topology at a nomi-
nal switching frequency of 550KHz. Input to output iso-
lation is achieved through the use of transformers in
the forward and feedback circuits.
The proprietary magnetic feedback circuit provides for
an extremely wide bandwidth control loop with a high
phase margin. The closed loop frequency response of
this converter family extends to approximately 50KHz,
resulting in superior line and load transient character-
istics. This feedback method is also inherently tem-
perature and radiation insensitive. This gives the AHF
Series an important advantage over converters that
incorporate opto-couplers in their design.
These converters are manufactured in a facility certi-
fied to MIL-PRF-38534. All processes used to manu-
facture these converters have been qualified to enable
Advanced Analog to deliver compliant devices. Four
screening grades are available to satisfy a wide range
of requirements.The CH grade converters are fully com-
pliant to MIL-PRF-38534 class H. The HB grade con-
verters are processed to full MIL-PRF-38534 screen-
ing but do not have class H element evaluation as re-
quired by MIL-PRF-38534. Two grades are fully tested
and operate the full military temperature range without
derating of output power. Industrial and commercial
grades are also available. Variations are electrical,
mechanical and screening can be accommodated.
AHF
Features
n 16 to 40 VDC Input Range (28 VDC Nominal)
n Single and Dual Outputs
n 12 Watts Output Power
n 22.8 W/in3 Power Density
n Low Input / Output Noise
(50mA/60mVp-p max. respectively)
n Indefinite Short Circuit and Overload
Protection
n Wideband Control Loop for
Superior Transient Characterstics
n No Derating for -55°C to +125°C Opertation
n Constant Switching Frequency
(550KHz Nominal)
Extensive computer simulation using complex
modeling enables rapid design modification to
be provided. Contact Advanced Analog with spe-
cific requirements.
www.irf.com
1
10/08/02



No Preview Available !

AHF2812D pdf
www.DataSheet4U.com
AHF28XX Series
Specifications
n ABSOLUTE MAXIMUM RATINGS
Input Voltage
Soldering Temperature
Case Temperature
-0.5V to 50V
300°C for 10 seconds
Operating -55°C to +125°C
Storage -65°C to +135°C
Table I. Electrical Performance Characteristics
AHF2805S
Test
Output voltage
Symbol
Conditions
-55°C Tc +125°C
Vin = 28 Vdc ±5%, CL = 0
Unless otherwise specified
VOUT
IOUT = 0
Output current1
Output ripple
voltage2
Line regulation
Load regulation
Input current
Input ripple current2
Efficiency
IOUT
VRIP
VR
LINE
VRLOAD
IIN
I
RIP
EFF
VIN = 16, 28, and 40 V dc
VIN = 16, 28, and 40 V dc,
B.W. = 20 Hz to 2MHz
V = 16, 28, and 40 V dc,
IN
Iout = 0, 500, and 1000 mA
VIN = 16, 28, and 40 V dc,
I = 0, 500, and 1000 mA
OUT
IOUT = 0, inhibit (pin 1)
tied to input return (pin 7)
I = 0,
OUT
inhibit (pin 1) = open
I = 1000mA
OUT
B.W. = 20 Hz to 2MHz
IOUT = 1000mA
Isolation
Capacitive load3,4
ISO Input to output or any pin
To case (except pin 6) at
500V dc Tc = +25°C
CL No effect on dc
performance, Tc = +25°C
Group A
Subgroups
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
4
Device
Types
01
01
01
01
01
01
01
01
01
01
Limits
Min Max
Unit
4.95
4.90
5.05
5.10
V
2400
mA
60 mV p-p
25 mV
50 mV
12
mA
30
50 mA p-p
76 %
74
100 M
500 µF
Power dissipation
load fault
Switching
frequency
PD Overload 5
Short circuit
FS IOUT = 1000mA
1
1,2,3
4,5,6
01 6 W
01 2
01
500 600
kHz
For Notes to Specifications, refer to page 3
2
www.irf.com



Part Number AHF2812D
Description Single and Dual Output
Maker International Rectifier - International Rectifier
Total Page 17 Pages
PDF Download
AHF2812D pdf
Download PDF File
AHF2812D pdf
View for Mobile



Featured Datasheets

Part Number Description Manufacturers PDF
AHF2812D Single and Dual Output AHF2812D
International Rectifier
PDF
AHF2812S Single and Dual Output AHF2812S
International Rectifier
PDF
AHF2815D Single and Dual Output AHF2815D
International Rectifier
PDF
AHF2815S Single and Dual Output AHF2815S
International Rectifier
PDF


Part Number Start With

0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

site map

webmaste! click here

contact us

Buy Components