AHE28XXS_07 概述
HYBRID-HIGH RELIABILITY DC/DC CONVERTER 混合高可靠性DC / DC转换器
AHE28XXS_07 数据手册
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AHE28XXS SERIES
28V Input, Single Output
HYBRID-HIGH RELIABILITY
DC/DC CONVERTER
Description
The AHE28XXS 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
single 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.
AHE
Features
n 17V to 40VDC Input Range (28VDC Nominal)
5V, 12V and 15V Outputs Available
n
n Indefinite Short Circuit and Overload Protection
n 17 W/in3 Power Density
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.
n 15W and 20W Output Power Models
n Fast Loop Response for Superior Transient
Characteristics
n Operating Temperature Range from -55°C to
+125°C Available
Three standard temperature grades are offered with
screening options. Refer to Part Number section. They
can be provided in a standard plug-in package for PC
mounting or in a flanged package for more severe
environments.
n Popular Industry Standard Pin-Out
n Resistance Seam Welded Case for Superior
Long Term Hermeticity
n Efficiencies up to 84%
n Shutdown from External Signal
n Military Screening
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. Extensive computer simulation using
complex modeling enables rapid design modification
to be provided. Contact IR Santa Clara with specific
requirements.
n 325,000 hour MTBF at 85°C (AUC)
n Standard Microcircuit Drawings Available
www.irf.com
1
01/08/07
AHE28XXS Series
Specifications
TCASE = -55°C to +85°C, VIN = +28V ± 5% unless otherwise specified
Absolute Maximum Ratings
Input Voltage 1
-0.5V to +50VDC
Internally limited, 17.5W typ. for AHE2805S, 22.5W typ. for AHE2812S and AHE2815S
Power Output
Soldering Temperature
Temperature Range 1
300°C for 10 seconds
Operating Temperature
Storage Case Temperature
-55°C to +125°C
-65°C to +135°C
Parameter
Conditions
AHE2805S
AHE2812S
AHE2815S
Typ
≤
≤
-55°C Tc +85°C
Vin = 28 Vdc ±5%,CL = 0
Unless otherwise specified
Min
Typ
Max
Min
Typ
Max
Min
Max
Units
Static Characteristic
OUTPUT
Voltage
Current
Ripple
4.90
0.0
5.00
20
5.10
3000
60
11.76
0.0
12.00
30
12.24
1667
60
14.70
0.0
15.00
30
15.30
1333
60
VDC
mADC
mVp-p
VIN=17 to 40 VDC
I
OUT=0 to Full Load
Full Load, DC to 1MHz
°
CASE = 25 C, IOUT = 0
T
4.95
15
5.00
5.05
11.88
20
12.00
12.12
14.85
20
15.00
15.15
VDC
W
Accuracy
Power1
REGULATION
Line
Load
V
IN = 17 to 40 VDC
±
0.5
±
0.5
±
1.0
±
1.0
±
0.5
±
0.5
±
±
±
0.5
±
0.5
±
1.0
±
1.0
%
1.0
1.0
IOUT = to Full Load
INPUT
Voltage Range4
Current
17
28
8.0
40
18
35
50
17
28
8.0
40
18
35
50
17
28.0
8.0
40
18
35
50
VDC
Inhibited
No Load
Full Load
mADC
mADC
mV p-p
Ripple Current
Efficiency
20
82
25
83
25
84
°
CASE = +25 C
T
80
79
80
%
Half Load to Full Load
Capacitive Load
Load fault power
dissipation4
No effect on performance
500
200
200
µ
F
6.0
6.0
6.0
W
Isolation
Input to Output @ 500Vdc
100
100
100
Ω
M
Dynamic
Characteristic
Step Load Changes
Output
50% Load 100% Load
No Load 50% Load
50% Load No Load
50% Load 100% Load
No Load 50% Load
50% Load No Load
mVpk
mVpk
mVpk
±
±
±
200
150
-300
+300
25
200
-400
+400
25
Transient
-400
+400
25
Recovery2
µ
µ
s
s
500
7.0
500
7.0
500
7.0
msec
Step Line Changes
Output
Transient
Input step 17 to 40VDC
Input step 40 to 17VDC
Input step 17 to 40VDC
Input step 40 to 17VDC
+180
-600
400
+180
-600
400
+180
-600
400
mVpk
mVpk
Recovery2
µ
s
s
400
400
400
µ
Turn-On
VIN = 17 to 40VDC
IOUT = 0 to Full load
Overshoot Delay3
0
8.0
8.0
500
14
14
300
8.0
8.0
600
14
14
300
8.0
8.0
500
14
14
mVpk
ms
ms
Load Fault
Recovery4
VIN = 17 to 40VDC
Weight
Standard Package
Flange Package
55
58
55
58
55
58
g
Notes to Specifications
1. Above +85°C case temperature, derate output power linearly to 0 and maximum input voltage linearly to 42V at 115°C case.
2. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1.0% of VOUT at 50% load.
See typical waveforms.
3. Turn-on delay time measurement is for either an application of power at the input or a signal at the shutdown pin.
4. For operation at 16VDC, derate output power by 33%.
2
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AHE28XXS Series
Specifications
TCASE = -55°C to +105°C, VIN = +28V ± 5% unless otherwise specified
Absolute Maximum Ratings
Input Voltage 5
-0.5V to +50VDC
Internally limited, 17.5W typ. for AHE2805S/ES, 22.5W typ. for AHE2812S/ES and AHE2815S/ES
Power Output
Soldering Temperature 300°C for 10 seconds
Temperature Range 1
Operating Temperature
-55°C to +125°C
Storage Case Temperature -65°C to +135°C
Parameter
Conditions
AHE2805S/ES
Typ
AHE2812S/ES
Typ
AHE2815S/ES
Typ
-55°C ≤ Tc ≤ +105°C
Vin = 28 Vdc ±5%,CL = 0
Unless otherwise specified
Min
Max
Min
Max
Min
Max
Units
Static Characteristic
OUTPUT
Voltage
Current
Ripple
4.90
0.0
5.00
20
5.10
3000
60
11.76
0.0
12.00
30
12.24
1667
60
14.70
0.0
15.00
30
15.30
1333
60
VDC
mADC
mVp-p
V
IN=17 to 40 VDC
IOUT=0 to Full Load
Full Load, DC to 1MHz
T
CASE = 25°C, IOUT = 0
4.95
15
5.00
5.05
11.88
20
12.00
12.12
14.85
20
15.00
15.15
VDC
W
Accuracy
Power1
REGULATION
Line
Load
VIN = 17 to 40 VDC
IOUT = 0 to Full Load
%
±
0.5
±
0.5
±
1.0
±
1.0
±
±
±
1.0
±
1.0
±
0.5
±
0.5
±
1.0
±
1.0
0.5
0.5
INPUT
Voltage Range4
Current
17
28
8.0
40
18
35
50
17
28
8.0
40
18
35
50
17
28
8.0
40
18
35
50
VDC
Inhibited
No Load
Full Load
mADC
mADC
mV p-p
Ripple Current
Efficiency
20
82
25
83
25
84
T
CASE = +25°C
78
79
80
%
Half load to Full load
Capacitive Load
Load fault power
dissipation4
No effect on performance
500
200
200
µF
6.0
6.0
6.0
W
Isolation
Input to Output @ 500Vdc
100
100
100
Ω
M
Dynamic
Characteristic
Step Load Changes
Output
50% Load 100% Load
No Load 50% Load
50% Load No Load
50% Load 100% Load
No Load 50% Load
50% Load No Load
mVpk
mVpk
mVpk
µs
±150
-300
+300
25
500
7.0
±200
-400
+400
25
500
7.0
±200
-400
+400
25
500
7.0
Transient
Recovery2
µs
ms
Step Line Changes
Output
Input step 17 to 40VDC
Input step 40 to 17VDC
Input step 17 to 40VDC
Input step 40 to 17VDC
+180
-600
400
+180
-600
400
+180
-600
400
mVpk
mVpk
µs
Transient
Recovery2
400
400
400
µs
TURN –ON
Overshoot
Delay3
VIN = 17 to 40VDC
0
8.0
500
14
300
8.0
600
14
300
8.0
750
14
mVpk
ms
I
OUT = 0 to Full Load
Load Fault Recovery4
Weight
VIN = 17 to 40VDC
8.0
14
8.0
14
8.0
14
ms
g
Standard Package
Flange Package
60
65
60
65
60
65
Notes to Specifications
1.
2.
Above +105°C case temperature, derate output power linearly to 0 at 125°C case.
Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1.0% of VOUT at 50% load.
See typical waveforms.
3.
4.
5.
Turn-on delay time measurement is for either an application of power at the input or a signal at the shutdown pin.
For operation at 16VDC, derate output power by 33%.
Above +85°C case temperature, derate maximum input voltage linearly to 33V at +125°C case.
www.irf.com
3
AHE28XXS Series
Specifications
TCASE = -55°C to +105°C, VIN = +28V ± 5% unless otherwise specified
Absolute Maximum Ratings
Input Voltage 1
-0.5V to +50VDC
Internally limited, 17.5W typ. for AHE2805S/HB & CH, 22.5W typ. for AHE281XS/HB & CH
Power Output
Soldering Temperature 300°C for 10 seconds
Temperature Range 1
Operating Temperature
-55°C to +125°C
Storage Case Temperature -65°C to +135°C
Parameter
Conditions
AHE2805S/HB&CH
AHE2812S/HB&CH
AHE2815S/HB&CH
-55°C ≤ Tc ≤ +125°C
Vin = 28 Vdc ±5%,CL = 0
Unless otherwise specified
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Units
Static Characteristic
OUTPUT
Voltage
Current
Ripple
VIN=17 to 40 VDC
4.90
0.0
5.00
20
5.10
3000
60
11.76
0.0
12.00
30
12.24
1667
60
14.70
0.0
15.00
30
15.30
1333
60
VDC
mADC
mVp-p
I
OUT=0 to Full Load
Full Load, DC to 1MHz
°
TCASE = 25 C, IOUT = 0
Accuracy
Power1
4.95
15
5.00
5.05
11.88
20
12.00
12.12
14.85
20
15.00
15.15
VDC
W
REGULATION
Line
VIN = 17 to 40 VDC
5.0
50
30
35
mV
T
CASE = 25°C
Load
10
17
50
17
120
50
17
150
IOUT = 0 to Full Load
INPUT
Voltage Range4
Current
28
8.0
40
18
35
50
28
8.0
40
18
35
50
28
8.0
40
18
35
50
VDC
mADC
mADC
mV p-p
%
Inhibited
No Load
Full Load
Ripple Current
Efficiency
Capacitive Load
Load fault power
dissipation5
20
82
1000
25
83
1000
25
84
1000
80
500
80
200
80
200
TCASE = +25°C
No effect on performance
Short Circuit TC =25°C
Overload TC = 25°C
Input to Output @ 500Vdc
µF
W
4.5
6.0
4.5
6.0
4.5
6.0
Isolation
100
100
100
MΩ
Dynamic
Characteristic
Step Load Changes
Output TC =25°C
Transient
50% Load 100% Load
No Load 50% Load
50% Load No Load
50% Load 100% Load
No Load 50% Load
50% Load No Load
mVpk
mVpk
mVpk
µs
±150
-300
+300
25
±300
-500
+500
70
200
5.0
±200
-400
+400
25
±300
-500
+500
70
1500
5.0
±200
-400
+400
25
±300
-500
+500
70
1500
5.0
Recovery2
100
500
500
µs
ms
Step Line Changes
Output TC = 25°C
Transient
Input step 17 to 40VDC
Input step 40 to 17VDC
Input step 17 to 40VDC
Input step 40 to 17VDC
+180
-600
400
+300
1000
800
+180
-600
400
+500
-1500
800
+180
-600
400
+500
-1500
800
mVpk
mVpk
Recovery2
s
s
µ
400
800
400
800
400
800
µ
TURN –ON
Overshoot
Delay3
V
IN = 17 to 40VDC
0
550
10
10
300
8.0
8.0
55
600
10
10
300
8.0
8.0
500
10
10
55
58
mVpk
ms
ms
g
IOUT = 0 to Full Load
VIN = 17 to 40VDC
Standard Package
Flange Package
8.0
8.0
55
Load Fault Recovery4
Weight
58
58
Notes to Specifications
1.
2.
Above +125°C case temperature, derate output power linearly to 0 at 135°C case.
Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1.0% of VOUT at 50% load.
See typical waveforms.
3.
4.
5.
Turn-on delay time measurement is for either an application of power at the input or a signal at the shutdown pin.
For operation at 16VDC, derate output power by 33%.
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
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AHE28XXS Series
Block Diagram
5
4
+Vout
+Input
1
EMI
Filter
Output
Return
Inhibit
Input
Drive 1
2
Pulse Width
Modulator
Error
Amp &
Ref
FB
Sync
9
3
VADJ
Drive 2
Input
Return
10
Device Synchronization
Application Information
Inhibit Function
Whenever multiple DC/DC converters are utilized in a
single system, significant low frequency noise may be
generated due to slight difference in the switching
frequencies of the converters (beat frequency noise).
Because of the low frequency nature of this noise
(typically less than 10KHz), it is difficult to filter out and
may interfere with proper operation of sensitive systems
(communications, radar or telemetry). Intenational
Rectifier offers an option, which provides synchronization
of multiple AHE/ATW/ATO type converters, thus
eliminating this type of noise.
Connecting the inhibit input (Pin 2) to input common (Pin 10)
will cause the converter to shut down. It is recommended
that the inhibit pin be driven by an open collector device
capable of sinking at least 400µA of current. The open
circuit voltage of the inhibit input is 11.5 ± 1.0VDC.
EMI Filter
An EMI filter (AFC461), available as an option, will reduce
the input ripple current to levels below the limits imposed by
MIL-STD-461B CEO.
Typical Synchronization Connection
Output Voltage Adjustment (AHE2805 only)
The output voltage of the AHE2805S converter can be
adjusted upward by connecting an appropriate resistor
between Output Adjust (Pin 3) and Output Common
(Pin 4) as shown in Table 1 below.
+ In
Output
Return
+ In
Output
Return
AFC461
or
AFV461
AHE28xxS
- MSTR
Case
Return
Return
MSTR
Table 1 Output adjustment resistor values
+ In
+Output
Return
Output Voltage Increases (%)
Resistance Pin 3 to 4 ( )
AHE28xxD
-SLV
Case
Return
System
Bus
None
390K
145K
63K
22K
0
0
-Output
SLV
+1%
+2%
+3%
+4%
+5%
Output
Return
+ In
AHE28xxS
-SLV
Case
Return
SLV
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5
AHE28XXS Series
The appropriate parts must be ordered to utilize this
feature. After selecting the converters required for the
system, a MSTR suffix is added for the master converter
part number and a SLV suffix is added for slave part number.
See Part Number section.
To take advantage of this capability, the system designer
must assign one of the converters as the master. Then,
by definition, the remaining converters become slaves and
will operate at the masters’ switching frequency.
The user should be aware that the synchronization system
is fail-safe; that is, the slaves will continue operating should
the master frequency be interrupted for any reason. The
layout must be such that the synchronization output (pin9)
of the master device is connected to the synchronization
input (pin 9) of each slave device. It is advisable to keep
this run short to minimize the possibility of radiating the
250KHz switching frequency.
Standard Microcircuit Drawing Equivalence Table
Standard Microcircuit
Drawing Number
5962-89683
Vendor Cage
IR Standard
Part Number
AHE2805S
Code
52467
52467
52467
5962-91580
AHE2812S
5962-91625
AHE2815S
6
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AHE28XXS Series
Mechanical Outlines
Non-Flanged
Flanged
0.050
0.800
0.040 D X
0.26 L Pins
2.880
Max
2.110
Max
4 X 0.400
=1.600
2.560
2.110
0.495
Ø 0.162
2 Holes
0.495
Max
1.110
Pin Designation
Pin #
Designation
1
2
+ Input
Inhibit Input
Output Adjust *
Output Return
+ Output
3
4
5
6
NC
7
NC
8
Case Ground
NC or Sync.
Input Return
9
10
* AHE2805S only. AHE2812S / 2815S have NC on Pin 3
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7
AHE28XXS Series
Device Screening
Requirement
MIL-STD-883 Method No Suffix
ES
HB
CH
Temperature Range
Element Evaluation
Non-Destructive
Bond Pull
-20°C to +85°C -55°C to +125°C
-55°C to +125°C -55°C to +125°C
MIL-PRF-38534
2023
N/A
N/A
N/A
N/A
Class H
N/A
N/A
N/A
Internal Visual
Temperature Cycle
Constant Acceleration
PIND
2017
1010
Yes
Cond B
500 Gs
N/A
Yes
Cond C
3000 Gs
N/A
Yes
Cond C
3000 Gs
N/A
N/A
N/A
2001, Y1 Axis
2020
N/A
Burn-In
1015
N/A
48 hrs@hi temp 160 hrs@125°C 160 hrs@125°C
Final Electrical
( Group A )
MIL-PRF-38534
& Specification
MIL-PRF-38534
1014
25°C
25°C
-55°C, +25°C,
+125°C
N/A
-55°C, +25°C,
+125°C
10%
PDA
N/A
Cond A
N/A
N/A
Cond A, C
N/A
Seal, Fine and Gross
Radiographic
External Visual
Cond A, C
N/A
Cond A, C
N/A
2012
2009
Yes
Yes
Yes
Notes:
Best commercial practice
Sample tests at low and high temperatures
-55°C to +105°C for AHE, ATO, ATW
Part Numbering
AHE 28 15 S F /CH - MSTR
Sync Option
MSTR = Master
SLV = Slave
Model
Omit for Standard
Input Voltage
Nominal
28 = 28V
Screening Level
(Please refer to Screening Table)
No Suffix, ES, HB, CH
Package Option
F = Flange
Blank = Non-Flanged
Output Voltage
05 = 5V
12 = 12V
15 = 15V
Output
S = Single
WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 252-7105
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. 01/2007
8
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