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PD-94554B
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. 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. 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. Manufactured in a facility fully qualified to MIL-PRF38534, 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.
AHE Features
n n n n n n n n n n n n n n 17V to 40VDC Input Range (28VDC Nominal) 5V, 12V and 15V Outputs Available Indefinite Short Circuit and Overload Protection 3 17 W/in Power Density 15W and 20W Output Power Models Fast Loop Response for Superior Transient Characteristics Operating Temperature Range from -55C to +125C Available Popular Industry Standard Pin-Out Resistance Seam Welded Case for Superior Long Term Hermeticity Efficiencies up to 84% Shutdown from External Signal Military Screening 325,000 hour MTBF at 85C (AUC) Standard Microcircuit Drawings Available
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01/08/07
AHE28XXS Series Specifications
TCASE = -55C to +85C, VIN = +28V 5% unless otherwise specified
Absolute Maximum Ratings
Input Voltage Power Output
1
-0.5V to +50VDC Internally limited, 17.5W typ. for AHE2805S, 22.5W typ. for AHE2812S and AHE2815S 300C for 10 seconds Operating Temperature Storage Case Temperature -55C to +125C -65C to +135C
AHE2812S AHE2815S
Soldering Temperature Temperature Range
1
Parameter
Conditions -55C Tc +85C Vin = 28 Vdc 5%,C L = 0 Unless otherwise specified Min
AHE2805S
Typ
Max
Min
Typ
Max
Min
Typ
Max
Units
Static Characteristic OUTPUT Voltage Current Ripple Accuracy 1 Power REGULATION Line Load INPUT 4 Voltage Range Current Ripple Current Efficiency Capacitive Load Load fault power 4 dissipation Isolation Dynamic Characteristic Step Load Changes Output Transient Recovery
2
VIN=17 to 40 VDC IOUT=0 to Full Load Full Load, DC to 1MHz TCASE = 25C, IOUT = 0
4.90 0.0 4.95 15
5.00 20 5.00 0.5 0.5
5.10 3000 60 5.05 1.0 1.0 40 18 35 50
11.76 0.0 11.88 20
12.00 30 12.00 0.5 0.5
12.24 1667 60 12.12 1.0 1.0 40 18 35 50
14.70 0.0 14.85 20
15.00 30 15.00 0.5 0.5
15.30 1333 60 15.15 1.0 1.0 40 18 35 50
VDC mADC mVp-p VDC W %
VIN = 17 to 40 VDC IOUT = to Full Load 17 Inhibited No Load Full Load TCASE = +25C Half Load to Full Load No effect on performance
28 8.0 20
17
28 8.0 25
17
28.0 8.0 25
VDC mADC mADC mV p-p % F
80 500
82
79 200 6.0
83
80 200 6.0
84
6.0 100
W M
Input to Output @ 500Vdc 100 100
50% Load 100% Load No Load 50% Load 50% Load No Load 50% Load 100% Load No Load 50% Load 50% Load No Load
150 -300 +300 25 500 7.0
200 -400 +400 25 500 7.0
200 -400 +400 25 500 7.0
mVpk mVpk mVpk s s msec mVpk mVpk s s 500 14 14 55 58 mVpk ms ms g
Step Line Changes Output Transient 2 Recovery
Turn-On Overshoot Delay3 Load Fault 4 Recovery Weight
Input step 17 to 40VDC Input step 40 to 17VDC Input step 17 to 40VDC Input step 40 to 17VDC VIN = 17 to 40VDC IOUT = 0 to Full load VIN = 17 to 40VDC Standard Package Flange Package
+180 -600 400 400 0 8.0 8.0 55 58 500 14 14
+180 -600 400 400 300 8.0 8.0 55 58 600 14 14
+180 -600 400 400 300 8.0 8.0
Notes to Specifications
1. Above +85C case temperature, derate output power linearly to 0 and maximum input voltage linearly to 42V at 115C case. 2. Recovery time is measured from the initiation of the transient to where V OUT 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%.
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AHE28XXS Series Specifications
TCASE = -55C to +105C, VIN = +28V 5% unless otherwise specified
Absolute Maximum Ratings
Input Voltage Power Output
5
-0.5V to +50VDC Internally limited, 17.5W typ. for AHE2805S/ES, 22.5W typ. for AHE2812S/ES and AHE2815S/ES
1
Soldering Temperature 300C for 10 seconds Temperature Range Operating Temperature Storage Case Temperature
Parameter Conditions -55C Tc +105C Vin = 28 Vdc 5%,CL = 0 Unless otherwise specified Min Static Characteristic OUTPUT Voltage Current Ripple Accuracy Power1 REGULATION Line Load INPUT Voltage Range4 Current Ripple Current Efficiency Capacitive Load Load fault power dissipation4 Isolation Dynamic Characteristic Step Load Changes Output Transient Recovery2 VIN=17 to 40 VDC IOUT=0 to Full Load Full Load, DC to 1MHz TCASE = 25C, IOUT = 0 4.90 0.0 4.95 15 5.00 20 5.00 0.5 0.5 17 28 8.0 20 78 500 82 5.10 3000 60 5.05 1.0 1.0 40 18 35 50 17 11.76 0.0 11.88 20 12.00 30 12.00 0.5 0.5 28 8.0 25 79 200 6.0 Input to Output @ 500Vdc 100 100 100 M 83 12.24 1667 60 12.12 1.0 1.0 40 18 35 50 17 14.70 0.0 14.85 20 15.00 30 15.00 0.5 0.5 28 8.0 25 80 200 6.0 84 15.30 1333 60 15.15 1.0 1.0 40 18 35 50 VDC mADC mVp-p VDC W %
-55C to +125C -65C to +135C
AHE2812S/ES AHE2815S/ES
AHE2805S/ES
Typ
Max
Min
Typ
Max
Min
Typ
Max
Units
VIN = 17 to 40 VDC IOUT = 0 to Full Load Inhibited No Load Full Load TCASE = +25C Half load to Full load No effect on performance
VDC mADC mADC mV p-p % F
6.0
W
50% Load 100% Load No Load 50% Load 50% Load No Load 50% Load 100% Load No Load 50% Load 50% Load No Load
150 -300 +300 25 500 7.0
200 -400 +400 25 500 7.0
200 -400 +400 25 500 7.0
mVpk mVpk mVpk s s ms mVpk mVpk s s 750 14 14 mVpk ms ms g
Step Line Changes Output Transient Recovery2 TURN -ON Overshoot Delay3 Load Fault Recovery4 Weight Input step 17 to Input step 40 to Input step 17 to Input step 40 to 40VDC 17VDC 40VDC 17VDC +180 -600 400 400 0 8.0 8.0 60 65 500 14 14 +180 -600 400 400 300 8.0 8.0 60 65 600 14 14 +180 -600 400 400 300 8.0 8.0 60 65
VIN = 17 to 40VDC IOUT = 0 to Full Load VIN = 17 to 40VDC Standard Package Flange Package
Notes to Specifications
1. 2. 3. 4. 5. Above +105C case temperature, derate output power linearly to 0 at 125C case. Recovery time is measured from the initiation of the transient to where V OUT has returned to within 1.0% of V OUT at 50% load. See typical waveforms. 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 +85C case temperature, derate maximum input voltage linearly to 33V at +125C case.
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3
AHE28XXS Series Specifications
TCASE = -55C to +105C, VIN = +28V 5% unless otherwise specified
Absolute Maximum Ratings
Input Voltage Power Output
1
-0.5V to +50VDC Internally limited, 17.5W typ. for AHE2805S/HB & CH, 22.5W typ. for AHE281XS/HB & CH
1
Soldering Temperature 300C for 10 seconds Temperature Range Operating Temperature Storage Case Temperature
Parameter Conditions -55C Tc +125C Vin = 28 Vdc 5%,CL = 0 Unless otherwise specified
-55C to +125C -65C to +135C
AHE2805S/HB&CH
AHE2812S/HB&CH
AHE2815S/HB&CH
Min Static Characteristic OUTPUT Voltage Current Ripple Accuracy Power1 REGULATION Line Load INPUT Voltage Range4 Current Ripple Current Efficiency Capacitive Load Load fault power dissipation5 Isolation Dynamic Characteristic Step Load Changes Output TC =25C Transient Recovery2 VIN=17 to 40 VDC IOUT=0 to Full Load Full Load, DC to 1MHz TCASE = 25C, IOUT = 0 4.90 0.0 4.95 15
Typ
Max
Min
Typ
Max
Min
Typ
Max
Units
5.00 20 5.00
5.10 3000 60 5.05 5.0
11.76 0.0 11.88 20
12.00 30 12.00
12.24 1667 60 12.12 30
14.70 0.0 14.85 20
15.00 30 15.00
15.30 1333 60 15.15 35
VDC mADC mVp-p VDC W mV
VIN = 17 to 40 VDC TCASE = 25C IOUT = 0 to Full Load Inhibited No Load Full Load TCASE = +25C No effect on performance Short Circuit TC =25C Overload TC = 25C Input to Output @ 500Vdc
10 17 28 8.0 20 82 1000
50 40 18 35 50
50 17 28 8.0 25 83 1000
120 40 18 35 50
50 17 28 8.0 25 84 1000
150 40 18 35 50 VDC mADC mADC mV p-p % F W M
80 500
80 200 4.5 6.0
80 200 4.5 6.0
4.5 6.0 100
100
100
50% Load 100% Load No Load 50% Load 50% Load No Load 50% Load 100% Load No Load 50% Load 50% Load No Load Input step 17 to 40VDC Input step 40 to 17VDC Input step 17 to 40VDC Input step 40 to 17VDC VIN = 17 to 40VDC IOUT = 0 to Full Load VIN = 17 to 40VDC Standard Package Flange Package
150 -300 +300 25 100
300 -500 +500 70 200 5.0 +300 1000 800 800 550 10 10
200 -400 +400 25 500
300 -500 +500 70 1500 5.0 +500 -1500 800 800 600 10 10
200 -400 +400 25 500
300 -500 +500 70 1500 5.0 +500 -1500 800 800 500 10 10 55 58
mVpk mVpk mVpk s s ms mVpk mVpk s s mVpk ms ms g
Step Line Changes Output TC = 25C Transient Recovery2 TURN -ON Overshoot Delay3 Load Fault Recovery4 Weight
+180 -600 400 400 0 8.0 8.0 55 58
+180 -600 400 400 300 8.0 8.0 55 58
+180 -600 400 400 300 8.0 8.0
Notes to Specifications
1. 2. 3. 4. 5. Above +125C case temperature, derate output power linearly to 0 at 135C case. Recovery time is measured from the initiation of the transient to where V OUT has returned to within 1.0% of V OUT at 50% load. See typical waveforms. 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.
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AHE28XXS Series
Block Diagram
+Input 1 Inhibit Input 2 Sync 9 Input Return 10
Drive 1
5 +Vout EMI Filter 4 Output Return
Pulse Width Modulator FB
Drive 2
Error Amp & Ref
3 VADJ
Application Information
Inhibit Function
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 400A of current. The open circuit voltage of the inhibit input is 11.5 1.0VDC.
Device Synchronization
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.
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.
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. Table 1 Output adjustment resistor values
Typical Synchronization Connection
+ In
Return
AFC461 or AFV461
Output
+ In Case
Return
Return
AHE28xxS - MSTR
MSTR
Output
Return
Resistance Pin 3 to 4 (:) None 390K 145K 63K 22K 0
Output Voltage Increases (%) 0 +1% +2% +3% +4% +5%
+ In Case
System Bus
Return
AHE28xxD -SLV
SLV
+Output Return -Output
+ In Case Return
AHE28xxS -SLV
SLV
Output
Return
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5
AHE28XXS Series
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. 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.
Standard Microcircuit Drawing Equivalence Table
Standard Microcircuit Drawing Number
5962-89683 5962-91580 5962-91625
Vendor Cage Code 52467 52467 52467
IR Standard Part Number
AHE2805S AHE2812S AHE2815S
6
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AHE28XXS Series
Mechanical Outlines Flanged
0.050 0.800
Non-Flanged
0.040 D X 0.26 L Pins
10
1
9
2
2.880 Max
2.560
2.110 Max
4 X 0.400 =1.600
2.110
8
3
7
4
6
5
0.495
1.110
0.495 Max
O 0.162 2 Holes
Pin Designation
Pin # 1 2 3 4 5 6 7 8 9 10 Designation + Input Inhibit Input Output Adjust * Output Return + Output NC NC Case Ground NC or Sync. Input Return
* AHE2805S only. AHE2812S / 2815S have NC on Pin 3
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AHE28XXS Series
Device Screening
Requirement
Temperature Range Element Evaluation Non-Destructive Bond Pull Internal Visual Temperature Cycle Constant Acceleration PIND Burn-In Final Electrical ( Group A ) PDA Seal, Fine and Gross Radiographic External Visual MIL-PRF-38534 2023 2017 1010 2001, Y1 Axis 2020 1015 MIL-PRF-38534 & Specification MIL-PRF-38534 1014 2012 2009 N/A Cond A N/A N/A Cond A, C N/A Yes
MIL-STD-883 Method
No Suffix
N/A N/A
ES
d
HB
CH
-55C to +125C Class H N/A Yes Cond C 3000 Gs N/A -55C, +25C, +125C 10% Cond A, C N/A Yes
-20C to +85C -55C to +125C N/A N/A Yes Cond B 500 Gs N/A
e -55C to +125C
N/A N/A Yes Cond C 3000 Gs N/A -55C, +25C, +125C N/A Cond A, C N/A Yes
c
N/A N/A N/A N/A 25C
48 hrs@hi temp 25C
d
160 hrs@125C 160 hrs@125C
c
Notes:
Best commercial practice Sample tests at low and high temperatures -55C to +105C for AHE, ATO, ATW
Part Numbering
AHE 28 15 S F /CH - MSTR Model Input Voltage Nominal
28 = 28V
Sync Option
MSTR = Master SLV = Slave Omit for Standard
(Please refer to Screening Table)
Screening Level Package Option
No Suffix, ES, HB, CH 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
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