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AHF2815S PDF 데이터시트 ( Data , Function )

부품번호 AHF2815S 기능
기능 Single and Dual Output
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AHF2815S 데이터시트, 핀배열, 회로
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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




AHF2815S pdf, 반도체, 판매, 대치품
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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 II. Electrical Performance Characteristics
AHF2812S
Conditions
Test
Symbol
-55°C Tc +125°C
Group A
Vin = 28 Vdc ±5%, CL = 0 Subgroups
Unless otherwise specified
Output voltage
VOUT
IOUT = 0
1
2,3
Output current1
Output ripple
voltage2
IOUT VIN = 16, 28, and 40 V dc
VRIP VIN = 16, 28, and 40 V dc,
B.W. = 20 Hz to 2MHz
1,2,3
1,2,3
Line regulation
VRLINE
VIN = 16, 28, and 40 V dc,
Iout = 0, 500, and 1000 mA
1,2,3
Load regulation
Input current
VRLOAD
IIN
VIN = 16, 28, and 40 V dc,
IOUT = 0, 500, and 1000 mA
IOUT = 0, inhibit (pin 1)
tied to input return (pin 7)
IOUT = 0,
inhibit (pin 1) = open
1,2,3
1,2,3
Input ripple current2 IRIP IOUT = 1000mA
B.W. = 20 Hz to 2MHz
1,2,3
Device
Types
01
01
01
01
01
01
01
Limits
Unit
Min Max
11.88 12.12
11.76 12.24
V
1000
mA
60 mV p-p
50 mV
50 mV
12
mA
50
50 mA p-p
Efficiency
Isolation
Capacitive load3,4
Power dissipation
load fault
EFF IOUT = 1000mA
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
PD Overload 5
Short circuit
1
2,3
1
4
1
1,2,3
01 78
75
01 100
%
M
01 500 µF
01 6 W
01 2
Switching
frequency
FS IOUT = 1000mA
For Notes to Specifications, refer to page 5
4
4,5,6
01
500 600
kHz
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AHF28XX Series
Table III. Electrical Performance Characteristics - continued
AHF2815S
Test
Output response to
step transient load
Changes6
Recovery time step
transient load
Changes6,7
Symbol
VOTLOAD
TTLOAD
Conditions
-55°C Tc +125°C
Vin = 28 Vdc ±5%, CL = 0
unless otherwise specified
1000 mA to/from 2000mA
0 mA to/from 1000mA
1000 mA to/from 2000mA
0 mA to/from 1000 mA
Output response to
transient step line
changes
VOTLINE
Input step 18 V to/from
40 V dc, I = 2000mA 4, 8
OUT
Group A
Subgroups
4,5,6
4,5,6
4
5,6
4
5,6
4,5,6
Recovery time
transient step line
changes
TTLINE
Input step 18 V to/from 40Vdc
IOUT = 2000mA 4, 7, 8
4,5,6
Turn on overshoot
Turn on delay
VTonOS
TonD
IOUT = 0 and 2000mA
IOUT = 0 and 2000mA 9
4,5,6
4,5,6
Device
Types
All
All
All
04
05
06
04
05
06
All
All
Limits
Min Max
-800
-1000
+800
+750
100
200
5
10
-1000 +1000
500
750
12
Unit
mV pk
µs
ms
mV pk
µs
mV pk
ms
Load fault
recovery4,9
Weight
TrLF
4,5,6
All
12 ms
38 grams
Notes to Specifications
1. Parameter guaranteed by line and load regulation tests.
2. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz.
3. Capacitive load may be any value from 0 to the maximum limit without compromising dc performance.
A capacitive 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.
4. 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 III.
5. 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.
6. Load step transition time between 2 and 10 microseconds.
7. 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.
8. Input step transition time between 2 and 10 microseconds.
9. 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 is unlimited.
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