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AHF2800 PDF 데이터시트 ( Data , Function )

부품번호 AHF2800 기능
기능 High Reliability DC/DC Converters
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AHF2800 데이터시트, 핀배열, 회로
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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
requirements of MIL-STD-704D. The basic circuit
utilizes a pulse width modulated, feed-forward
topology at a nominal switching frequency of 550
KHz. Input to output isolation 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 50 kHz, resulting in superior line
and load transient characteristics. This feedback
method is also inherently temperature 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
certified to MIL-PRF-38534. All processes used to
manufacture these converters have been qualified
to enable Lambda Advanced Analog to deliver
compliant devices. Four screening grades are
available to satisfy a wide range of requirements.
The CH grade converters are fully compliant to
MIL-PRF-38534 class H. The HB grade
converters are processed to full MIL-PRF-38534
screening but do not have class H element
evaluation as required by MIL-PRF-38534. Two
grades are fully tested and operate over the full
military temperature range without derating of
output power. Industrial and commercial grades
are also available. Variations in electrical,
mechanical and screening can be accommodated.
Extensive computer simulation using complex
modeling enables rapid design modification to be
provided. Contact Lambda Advanced Analog with
specific requirements.
AHF2800 Series
Hybrid - High Reliability
DC/DC Converters
FEATURES
s 16 - 40 VDC input range
(28 VDC nominal)
s Single and dual outputs
s 12 watts output power
s 22.8 W/in3 power density
s Low input/output noise
(50 mA/60 mV p-p max. respectively)
s Indefinite short circuit and overload
protection
s Wideband control loop for superior
transient characteristics
s No derating for -55°C to +125°C
operation
s Constant switching frequency
(550 kHz nominal)




AHF2800 pdf, 반도체, 판매, 대치품
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SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Input Voltage
-0.5V to 50V
Soldering Temperature
300°C for 10 seconds
Case Temperature
Operating-55°C to +125°C
Storage -65°C to +135°C
TABLE III. Electrical Performance Characteristics
Test
Symbol
Conditions
Group A
Device
-55°C TC +125°C
subgroups types
VIN = 28 V dc ±5%, CL = 0 unless
otherwise specified
Output voltage
VOUT
IOUT = 0
1 All
AHF2815S
Limits
Unit
Min
14.85
Max
15.15 V
Output current 1/
Output ripple voltage 2/
Line
regulation
IOUT VIN = 18, 28, and 40 V dc,
VRIP
VRLINE
VIN = 18, 28, and 40 V dc,
B.W. = 20 Hz to 2 MHz
VIN = 18, 28, and 40 V dc,
IOUT = 0, 1000, and 2000 mA
Load
regulation
Input current
Input ripple current 2/
Efficiency
VRLOAD
IIN
VIN = 18, 28, and 40 V dc,
IOUT = 0, 1000, and 2000 mA
IOUT = 0, inhibit (pin 2)
tied to input return (pin 10)
IOUT = 0, inhibit (pin 2) = open
IRIP IOUT = 2000 mA,
B.W. = 20 Hz to 2 MHz
EFF IOUT = 2000 mA,
Isolation
Capacitive load 3/ 4/
Power dissipation
load fault
Switching frequency
ISO Input to output or any pin
to case (except pin 7) at 500
V dc, TC = +25°C
CL No effect on dc performance,
TC = +25°C
PD Overload 5/
Short circuit
FS IOUT = 2000 mA
See footnotes at end of table.
4
2,3
1,2,3
1,2,3
1
2,3
1,2,3
1,2,3
All
All
All
All
All
1,2,3
1
2,3
1
All
All
All
4
1
1,2,3
4,5,6
All
All
All
01, 04
02, 05
03, 06
14.70
80
77
100
15.30
2000 mA
50 mV p-p
±35 mV
±75
±150 mV
18 mA
50
20 mA p-p
%
M
200 µF
12 W
9
250 300 kHz
250 270
275 300

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AHF2800 전자부품, 판매, 대치품
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TABLE V. Electrical performance characteristics - Continued.
AHF2812D
Test
Symbol
Conditions
Group A
Device
-55°C TC +125°C
Subgroups types
VIN = 28 V dc ±5%, CL = 0 unless
otherwise specified
Switching frequency 4/
FS
IOUT = 1000 mA
Output response to step
VOTLOAD 500 mA to/from 1000 mA
transient load changes 4/ 9/
0 mA to/from 500 mA
Recovery time, step transient TTLOAD
load changes 4/ 9/ 10/
500 mA to/from 1000 mA
0 mA to/from 500 mA
Output response transient step VOTLINE Input step from/to 16 to 40 V dc,
line changes 4/ 7/ 11/
IOUT = 1000 mA
Recovery time transient step
line changes 4/ 7/ 10/ 11/
TTLINE
Input step from/to 16 to
40 V dc,
IOUT = 1000 mA
Turn on overshoot 4/
Turn on delay 4 12/
Load fault recovery 7/
Weight
VTonOS
TonD
TrLF
IOUT = 0 and 1000 mA
IOUT = 0 and 1000 mA
4,5,6
4,5,6
4,5,6
4,5,6
4,5,6
4,5,6
4,5,6
01
01
01
01
01
01
01
4,5,6
4,5,6
4,5,6
01
01
01
Limits
Unit
Min
500
-200
Max
600 kHz
+200 mV pk
-800 +800
70 µs
1000
-750 +750 mV pk
1200 µs
600 mV pk
25 ms
25 ms
38 grams
Notes:
1/ Parameter guaranteed by line load, and cross regulation tests.
2/ Up to 90 percent of full power is available from either output provided the total output does not exceed 12 W.
3/ Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz.
4/ Load current split equally between +VOUT and -VOUT.
5/ 1.2 watt load on output under test, 1.2 watt to 10.8 watt load change on other output.
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/ Parameter shall be tested as part of design characterization and after design or process changes. Thereafter, parameters shall be guaranteed to the
limits specified inTable V.
8/ 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.
9/ Load step transition time between 2 and 10 microseconds.
10/ Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1 percent of VOUT at 50 percent load.
11/ Input step transition time between 2 and 10 microseconds.
12/ 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 1)
while power is applied to the input.
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