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PD-94555B
AHE28XXD SERIES
28V Input, Dual Output
HYBRID-HIGH RELIABILITY DC/DC CONVERTER
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-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. Contact IR Santa Clara for special requirements.
AHE Features
n n n n n n n n n n n n n n n 17V to 40VDC Input Range 28VDC Nominal Input 5V, 12V and 15V Outputs Available Indefinite Short Circuit and Overload Protection 3 12.9W/in Power Density 15W Output Power 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 82% Shutdown from External Signal Military Screening 314,000 hour MTBF at 85C (AUC) Standard Microcircuit Drawings Available
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1
01/08/07
AHE28XXD Series Specifications
Absolute Maximum Ratings
Input voltage Soldering temperature Operating case temperature Storage case temperature -0.5V to +50VDC 300C for 10 seconds -55C to +125C -65C to +135C
AHE2805D
Table I. Electrical Performance Characteristics
Test Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 Unless otherwise specified IOUT = 0 VIN = 17, 28, and 40 V dc VIN = 17, 28, and 40 V dc, B.W. = DC to 2MHz VIN =17,28, and 40 V dc VIN = 17, 28, and 40 V dc, Iout = 0, 313, and 625mA VIN = 17, 28, and 40 V dc, IOUT = 0, 313,and 625 mA IOUT = 0, inhibit (pin 2) tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open IOUT = 625mA B.W. = DC to 2MHz IOUT = 625mA TC = +25C Input to output or any pin to case (except pin 8) at 500V dc Tc = +25C No effect on dc performance, Tc = +25C 3 Overload, TC = +25C Short circuit, TC = +25C IOUT = 625mA 50% load to/from100%load Group A Subgroups Device Types Limits Unit
Output voltage Output current
9, 11 8, 9
VOUT IOUT VRIP POUT VRLINE VRLOAD IIN
1 2,3 1,2,3 1,2,3 1,2,3 1 2,3 1,2,3 1,2,3
All All All All All All All
Min 4.95 4.90 0.0
Max 5.05 5.10 625 60
V mA mVp-p W mV mV mA
Output ripple voltage Output power 9 Line 10 Regulation Load 9 Regulation Input current
4, 9, 11
15 25 50 110 18 40
Input ripple current Efficiency Isolation Capacitive load
8
IRIP EFF ISO
1,2,3 1 1 4 1 1 4,5,6
All All All All All 80 100
50
mAp-p % M
6, 12
CL PD
9
200 6.0 6.0 275 245 275 +300 +450 +500 +750
F W
Power dissipation load fault Switching frequency
FS
Output response to step 7 transient load changes
VOTLOAD
4 5,6 4 5,6
01 02 03 All
225 225 250 -300 -450 -500 -750
KHz
mVpk
No load to/from 50% load
All
For Notes to Specifications, refer to page 3
2
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AHE28XXD Series
Table I. Electrical Performance Characteristics - continued
Test Symbol Conditions -55 Tc +125C Vin = 28 Vdc 5%, CL= 0 unless otherwise specified 50% load to/from 100% load Group A Subgroups Device Types Limits
AHE2805D
Unit
Min Recovery time step transient load 1, 7 changes TTLOAD 4 All
Max 70 s
Output response transient step line 5, 12 changes Recovery time transient step 1, 5, 12 line changes Turn on overshoot 2, 9 Turn on delay
9
VOTLINE
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
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
100 1500 5.0 1200 -1500 4.0 4.0 600 10 10
ms mVpk
TTLINE
ms
VTonOS TonD TrLF
mVpk ms ms
Load fault recovery
12
Notes to Specifications
1 Recovery time is measured from the initiation of the transient to where V OUT has returned to within 0.1 % of V OUT 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 2.0s and 10s. 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 2.0s and 10s. 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 I.
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AHE28XXD Series Specifications
Absolute Maximum Ratings
Input voltage Soldering temperature Operating case temperature Storage case temperature -0.5V to +50VDC 300C for 10 seconds -55C to +125C -65C to +135C
AHE2812D
Table II. Electrical Performance Characteristics
Test Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 Unless otherwise specified IOUT = 0 VIN = 17, 28, and 40 V dc VIN = 17, 28, and 40 V dc, B.W. = DC to 2MHz VIN =17,28, and 40 V dc VIN = 17, 28, and 40 V dc, Iout = 0, 313, and 625mA VIN = 17, 28, and 40 V dc, IOUT = 0, 313,and 625 mA IOUT = 0, inhibit (pin 2) tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open IOUT = 625mA B.W. = DC to 2MHz IOUT = 625mA TC = +25C Input to output or any pin to case (except pin 8) at 500V dc Tc = +25C No effect on dc performance, Tc = +25C 3 Overload, TC = +25C Short circuit, TC = +25C IOUT = 625mA Group A Subgroups Device Types Limits Unit
Output voltage Output current
9, 11 8, 9
VOUT IOUT VRIP POUT VRLINE VRLOAD IIN
1 2,3 1,2,3 1,2,3 1,2,3 1 2,3 1,2,3 1,2,3
All All All All All All All
Min 11.88 11.70 0.0
Max 12.12 12.24 625 60
V mA mVp-p W mV mV mA
Output ripple voltage Output power 9 Line 10 Regulation Load 9 Regulation Input current
4, 9, 11
15 30 60 120 18 40
Input ripple current Efficiency Isolation Capacitive load
8
IRIP EFF ISO
1,2,3 1 1 4 1 1 4,5,6
All All All All All 01 02 03 All 225 225 250 -300 -450 -500 -750 80 100
50
mAp-p % M
6, 12
CL PD
9
200 6.0 6.0 275 245 275 +300 +450 +500 +750
F W KHz
Power dissipation load fault Switching frequency
FS
Output response to step 7 transient load changes
VOTLOAD
50% load to/from100%load
4 5,6 4 5,6
mVpk
No load to/from 50% load
All
4
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AHE28XXD Series
Table II. Electrical Performance Characteristics - continued
Test Symbol Conditions -55 Tc +125C Vin = 28 Vdc 5%, CL= 0 unless otherwise specified 50% load to/from 100% load Group A Subgroups Device Types Limits
AHE2812D
Unit
Min Recovery time step transient load 1, 7 changes TTLOAD 4 All
Max 70 s
Output response transient step line 5, 12 changes Recovery time transient step 1, 5, 12 line changes Turn on overshoot 2, 9 Turn on delay
9
VOTLINE
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
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
100 1500 5.0 1200 -1500 4.0 4.0 600 10 10
ms mVpk
TTLINE
ms
VTonOS TonD TrLF
mVpk ms ms
Load fault recovery
12
Notes to Specifications
1 Recovery time is measured from the initiation of the transient to where VOUT has returned to within 0.1% of V OUT 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 2.0s and 10s. 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 2.0s and 10s. 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.
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AHE28XXD Series Specifications
Absolute Maximum Ratings
Input voltage Soldering temperature Operating case temperature Storage case temperature -0.5V to +50VDC 300C for 10 seconds -55C to +125C -65C to +135C
AHE2815D
Table III. Electrical Performance Characteristics
Test Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 Unless otherwise specified IOUT = 0 VIN = 17, 28, and 40 V dc VIN = 17, 28, and 40 V dc, B.W. = dc to 2 mHz VIN =17,28, and 40 V dc VIN = 17, 28, and 40 V dc, Iout = 0, 250, and 500mA VIN = 17, 28, and 40 V dc, IOUT = 0, 250,and 625 mA IOUT = 0, inhibit (pin 2) tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open IOUT = 500mA B.W. = DC to 2MHz IOUT = 500mA TC = +25C Input to output or any pin to case (except pin 8) at 500V dc Tc = +25C No effect on dc performance, Tc = +25C 3 Overload, TC = +25C IOUT = 500mA Group A Subgroups Device Types Limits Unit
Output voltage Output current
9, 11
VOUT IOUT VRIP POUT VRLINE VRLOAD IIN
1 2,3 1,2,3 1,2,3 1,2,3 1 2,3 1,2,3 1,2,3
All All All All All All All
Min 14.85 14.70 0.0
Max 15.15 15.30 500 60
V mA mVp-p W mV mV mA
Output ripple voltage
8, 9
Output power Line 9, 10 Regulation Load 9 Regulation Input current
4, 9, 11
15 35 75 150 18 40
Input ripple current Efficiency Isolation Capacitive load
8
IRIP EFF ISO
1,2,3 1 1 4 1 4,5,6
All All All All All 01 02 03 All 225 225 250 -300 -450 -500 -750 80 100
50
mAp-p % M
6, 12
CL PD FS
200 6.0 275 245 275 +300 +450 +500 +750
F W KHz
Power dissipation load fault 9 Switching frequency
Output response to step transient load 7 changes
VOTLOAD
50% load to/from100%load
4 5,6 4 5,6
mVpk
No load to/from 50% load
All
Refer Notes to Specifications, refer to page 5
6
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AHE28XXD Series
Table III. Electrical Performance Characteristics - continued
Test Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 unless otherwise specified 50% load to/from 100% load Group A Subgroups Device Types Min Recovery time step transient 1, 7 load changes TTLOAD 4 5,6 4,5,6 4,5,6 4,5,6 All Limits
AHE2815D
Unit
Max 70 100 1500 5.0 1500
s
Output response transient step 5, 12 line changes Recovery time transient step line 1, 5, 12 changes Turn on 9 overshoot 2, 9 Turn on delay Load fault 12 recovery
VOTLINE
No load to 50% load 50% load to no load Input step 17 to 40V dc
All All All
ms mV pk
TTLINE
Input step 40 to 17V dc Input step 17 to 40V dc
4,5,6 4,5,6
All All
-1500 4.0
ms
VTonOS TonD TrLF
Input step 40 to 17V dc IOUT = 0 and 500mA IOUT = 0 and 500mA
4,5,6 4,5,6 4,5,6 4,5,6
All All All All
4.0 600 10 10
mV pk ms 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 16Vdc input, derate output power by 33 %. 5 Input step transition time between 2.0s and 10s. 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 2.0s and 10s. 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 III.
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AHE28XXD Series
Block Diagram
3 +Vout +Input 1 Inhibit Input 2 Sync 9 Input Return 10
Drive 1
EMI Filter
Regulator
4 Output Return 5 -Vout
Pulse Width Modulator FB
Drive 2
Error Amp & Reference
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.
International Rectifier offers an option that provides synchronization of multiple AHE/ATW converters, thus eliminating this type of noise. 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 (pin 9) 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.
EMI Filter
An optional EMI filter (AFC461) will reduce the input ripple current to levels below the limits imposed by MIL-STD-461 CEO3.
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).
Typical Synchronization Connection
+ In
Return
AFC461 or AFV461
Output
+ In Case
Output
AHE28xxS
Return MSTR
Return
Return
System Bus
+ In
AHE28xxS Output or Other Return Compatable Return
Case SLV
+ In Case Return SLV
Output
AHE28xxS
Return
8
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AHE28XXD Series
Mechanical Outlines Flanged
O 0.162 2 Holes 0.050 0.800
Non-Flanged
0.040 D X 0.26 L Pins
10
1 2
2.880 Max
2.560
2.110 Max
4 X 0.400 =1.600
9
2.110
3
7
8
4 5
6
0.495 1.110 0.495 Max
Pin Designation
Pin # 1 2 3 4 5 6 7 8 9 10 Designation + Input Inhibit Input + Output Output Return - Output NC NC Case Ground NC or Sync. Input Return
Standard Microcircuit Drawing Equivalence Table
Standard Microcircuit Drawing Number
5962-92040 5962-91575
Vendor Cage Code 52467 52467
IR Standard Part Number
AHE2812D AHE2815D
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9
AHE28XXD 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 D F /CH - MSTR Model Input Voltage Nominal
28 = 28V
Sync Option
MSTR = Master SLV = Slave Omit for Standard
Screening Level Package Option
(Please refer to Screening Table)
No Suffix, ES, HB, CH F = Flange Blank = Non-Flanged
Output Voltage
05 = 5V 12 = 12V 15 = 15V
Output
D = Dual
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
10
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