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PDF AHE2805D Data sheet ( Hoja de datos )
| Número de pieza | AHE2805D | |
| Descripción | HYBRID-HIGH RELIABILITY DC/DC CONVERTER | |
| Fabricantes | International Rectifier | |
| Logotipo |  |
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HYBRID-HIGH RELIABILITY
DC/DC CONVERTER
PD-94555B
AHE28XXD SERIES
28V Input, Dual Output
Description
The AHE Series of DC/DC converters feature high
power density and an extended temperature range for
use in military and industrial applications. Designed to
MIL-STD-704D input requirements, these devices have
nominal 28VDC inputs with ±5V, ±12V and ±15V dual
outputs to satisfy a wide range of requirements. The
circuit design incorporates a pulse width modulated
push-pull topology operating in the feed-forward mode
at a nominal switching frequency of 250KHz. Input to
output isolation is achieved through the use of
transformers in the forward and feedback circuits.
The advanced feedback design provides fast loop
response for superior line and load transient characteristics
and offers greater reliability and radiation tolerance
than devices incorporating optical feedback circuits.
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.
AHE
Features
n 17V to 40VDC Input Range
n 28VDC Nominal Input
n ± 5V, ±12V and ±15V Outputs Available
n Indefinite Short Circuit and Overload
Protection
n 12.9W/in3 Power Density
n 15W Output Power
n Fast Loop Response for Superior Transient
Characteristics
n Operating Temperature Range from -55°C to
+125°C Available
n Popular Industry Standard Pin-Out
n Resistance Seam Welded Case for Superior
Long Term Hermeticity
n Efficiencies up to 82%
n Shutdown from External Signal
n Military Screening
n 314,000 hour MTBF at 85°C (AUC)
n Standard Microcircuit Drawings Available
www.irf.com
www.DataSheet4U.net
1
01/08/07
1 page  
AHE28XXD Series
Table II. Electrical Performance Characteristics - continued
Test
Symbol
Conditions
Group A
-55° ≤Tc ≤+125°C
Subgroups
Vin = 28 Vdc ±5%, CL= 0
unless otherwise
specified
Device
Types
Recovery time step
transient load
changes 1, 7
TTLOAD
Output response
transient step line
changes 5, 12
VOTLINE
Recovery time
transient step
line changes1, 5, 12
Turn on overshoot 9
Turn on delay 2, 9
Load fault recovery 12
TTLINE
VTonOS
TonD
TrLF
50% load to/from 100%
load
No load to 50% load
50% load to no load
Input step 17 to 40V dc
Input step 40 to 17V dc
Input step 17 to 40V dc
Input step 40 to 17V dc
IOUT = 0 and ±625mA
IOUT = 0 and ±625mA
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
All
All
All
All
All
All
All
All
All
All
Limits
AHE2812D
Unit
Min Max
70
100
1500
5.0
1200
µs
ms
mVpk
-1500
4.0
ms
4.0
600 mVpk
10 ms
10 ms
Notes to Specifications
1 Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±0.1% of VOUT at 50 % load.
2 Turn on delay time measurement is for either a step application of power at the input or the removal of a ground signal from the
inhibit pin (pin 2) while power is applied to the input.
3 An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit
protection and is the condition of maximum power dissipation.
4 Total power at both outputs. For operation at 16V dc input, derate output power by 33 %.
5 Input step transition time between 2.0µs and 10µs.
6 Capacitive load may be any value from 0 to the maximum limit without compromising dc performance. A capacitive load in excess
of the maximum limit will not disturb loop stability but may interfere with the operation of the load fault detection circuitry,
appearing as a short circuit during turn-on.
7 Load step transition time between 2.0µs and 10µs.
8 Bandwidth guaranteed by design. Tested for 20KHz to 2.0MHz.
9 Tested at each output.
10 When operating with unbalanced loads, at least 25 % of the load must be on the positive output to maintain regulation.
11 Parameter guaranteed by line and load regulation tests.
12 Parameter shall be tested as part of design characterization and after design or process changes. Thereafter parameters shall be
guaranteed to the limits specified in Table II.
www.irf.com
5
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet AHE2805D.PDF ] | |
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