AHE2812D/ES-MSTR - International Rectifier

01/08/07

www.irf.com 1

AHE28XXD SERIES

Description

n 17V to 40VDC Input Range

n 28VDC Nominal Input

n ± 5V, ±12V and ±15V Outputs Available

n Indefinite Short Circuit and Overload

Protection

n 12.9W/in3 Power Density

n 15W Output Power

n Fast Loop Response for Superior Transient

Characteristics

n Operating Temperature Range from -55°C to

+125°C Available

n Popular Industry Standard Pin-Out

n Resistance Seam Welded Case for Superior

Long Term Hermeticity

n Efficiencies up to 82%

n Shutdown from External Signal

n Military Screening

n 314,000 hour MTBF at 85°C (AUC)

nStandard Microcircuit Drawings Available

Features

AHE

28V Input, Dual Output

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.

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. Contact IR Santa Clara for special

requirements.

HYBRID-HIGH RELIABILITY

DC/DC CONVERTER

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.

PD-94555B

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AHE28XXD Series

Specifications

For Notes to Specifications, refer to page 3

Table I. Electrical Performance Characteristics

AHE2805D

Test Symbol Conditions

-55°C ≤ Tc ≤+125°C

Vin = 28 Vdc ±5%, CL = 0

Unless otherwise specified

Group A

Subgroups

Device

Types

Limits Unit

Min Max

Output voltage VOUT I

OUT = 0 1 All ±4.95 ±5.05 V

2,3

±4.90 ±5.10

Output current 9, 11 IOUT

VIN = 17, 28, and 40 V dc 1,2,3 All 0.0 ±625 mA

Output ripple voltage 8, 9 VRIP V

IN = 17, 28, and 40 V dc,

B.W. = DC to 2MHz

1,2,3 All 60 mVp-p

Output power 4, 9, 11 POUT V

IN =17,28, and 40 V dc 1,2,3 All 15 W

1 25

Line 9

Regulation 10

VRLINE V

IN = 17, 28, and 40 V dc,

Iout = 0, ±313, and ±625mA 2,3

All

Load

Regulation 9

VRLOAD V

IN = 17, 28, and 40 V dc,

IOUT = 0, ±313,and ±625

1,2,3 All 110 mV

Input current IIN I

OUT = 0, inhibit (pin 2)

tied to input return (pin 10)

1,2,3 All 18 mA

OUT = 0,

inhibit (pin 2) = open

Input ripple current 8 IRIP IOUT = ±625mA

B.W. = DC to 2MHz

1,2,3 All 50 mAp-p

Efficiency EFF IOUT = ±625mA 1 All 80 %

TC = +25°C

Isolation ISO Input to output or any pin

to case (except pin 8)

at 500V dc Tc = +25ºC

1 All 100

MΩ

Capacitive load 6, 12 CL No effect on dc

performance,

Tc = +25ºC

4 All 200 µF

Power dissipation

load fault

PD Overload, TC = +25°C 3 1 All 6.0

Short circuit, TC = +25°C 1 6.0

Switching frequency 9 FS IOUT = ±625mA 4,5,6 01 225 275 KHz

02 225 245

03 250 275

Output response to step

transient load changes 7

VOTLOAD 50% load to/from100%load 4 All -300 +300

5,6 -450 +450 mVpk

No load to/from 50% load 4 All -500 +500

5,6 -750 +750

Input voltage -0.5V to +50VDC

Soldering temperature 300°C for 10 seconds

Operating case temperature -55°C to +125°C

Storage case temperature -65°C to +135°C

Absolute Maximum Ratings

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AHE28XXD Series

Notes to Specifications

Table I. Electrical Performance Characteristics - continued

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 16V dc input, derate output power by 33 %.

5 Input step transition time between 2.0µs and 10µs.

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 2.0µs and 10µs.

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.

AHE2805D

Test Symbol Conditions

-55° ≤Tc ≤+125°C

Vin = 28 Vdc ±5%, CL= 0

unless otherwise

specified

Group A

Subgroups

Device

Types

Limits Unit

Min Max

Recovery time step

transient load

changes 1, 7

TTLOAD 50% load to/from 100%

load

4 All 70

µs

5,6 100

No load to 50% load 4,5,6 All 1500

50% load to no load 4,5,6 All 5.0 ms

Output response

transient step line

changes 5, 12

VOTLINE Input step 17 to 40V dc

4,5,6 All 1200 mVpk

Input step 40 to 17V dc 4,5,6 All -1500

Recovery time

transient step

line changes1, 5, 12

TTLINE Input step 17 to 40V dc 4,5,6 All 4.0 ms

Input step 40 to 17V dc 4,5,6 All 4.0

Turn on overshoot 9 VTonOS IOUT = 0 and ±625mA 4,5,6 All 600 mVpk

Turn on delay 2, 9 TonD IOUT = 0 and ±625mA

4,5,6 All 10 ms

Load fault recovery 12 TrLF 4,5,6 All 10 ms

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AHE28XXD Series

Specifications AHE2812D

Table II. Electrical Performance Characteristics

Test Symbol Conditions

-55°C ≤ Tc ≤+125°C

Vin = 28 Vdc ±5%, CL = 0

Unless otherwise specified

Group A

Subgroups

Device

Types

Limits Unit

Min Max

Output voltage VOUT I

OUT = 0 1 All ±11.88 ±12.12 V

2,3

±11.70 ±12.24

Output current 9, 11 IOUT

VIN = 17, 28, and 40 V dc 1,2,3 All 0.0 ±625 mA

Output ripple voltage 8, 9 VRIP V

IN = 17, 28, and 40 V dc,

B.W. = DC to 2MHz

1,2,3 All 60 mVp-p

Output power 4, 9, 11 POUT V

IN =17,28, and 40 V dc 1,2,3 All 15 W

1 30

Line 9

Regulation 10

VRLINE V

IN = 17, 28, and 40 V dc,

Iout = 0, ±313, and ±625mA 2,3

All

Load

Regulation 9

VRLOAD V

IN = 17, 28, and 40 V dc,

IOUT = 0, ±313,and ±625

1,2,3 All 120 mV

Input current IIN I

OUT = 0, inhibit (pin 2)

tied to input return (pin 10)

1,2,3 All 18 mA

OUT = 0,

inhibit (pin 2) = open

Input ripple current 8 IRIP IOUT = ±625mA

B.W. = DC to 2MHz

1,2,3 All 50 mAp-p

Efficiency EFF IOUT = ±625mA 1 All 80 %

TC = +25°C

Isolation ISO Input to output or any pin

to case (except pin 8)

at 500V dc Tc = +25ºC

1 All 100

MΩ

Capacitive load 6, 12 CL No effect on dc

performance,

Tc = +25ºC

4 All 200 µF

Power dissipation

load fault

PD Overload, TC = +25°C 3 1 All 6.0

Short circuit, TC = +25°C 1 6.0

Switching frequency 9 FS IOUT = ±625mA 4,5,6 01 225 275 KHz

02 225 245

03 250 275

Output response to step

transient load changes 7

VOTLOAD 50% load to/from100%load 4 All -300 +300

5,6 -450 +450 mVpk

No load to/from 50% load 4 All -500 +500

5,6 -750 +750

Input voltage -0.5V to +50VDC

Soldering temperature 300°C for 10 seconds

Operating case temperature -55°C to +125°C

Storage case temperature -65°C to +135°C

Absolute Maximum Ratings

www.irf.com 5

AHE28XXD Series

Table II. Electrical Performance Characteristics - continued

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 16V dc input, derate output power by 33 %.

5 Input step transition time between 2.0µs and 10µs.

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 2.0µs and 10µs.

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.

AHE2812D

Test Symbol Conditions

-55° ≤Tc ≤+125°C

Vin = 28 Vdc ±5%, CL= 0

unless otherwise

specified

Group A

Subgroups

Device

Types

Limits Unit

Min Max

Recovery time step

transient load

changes 1, 7

TTLOAD 50% load to/from 100%

load

4 All 70

µs

5,6 100

No load to 50% load 4,5,6 All 1500

50% load to no load 4,5,6 All 5.0 ms

Output response

transient step line

changes 5, 12

VOTLINE Input step 17 to 40V dc

4,5,6 All 1200 mVpk

Input step 40 to 17V dc 4,5,6 All -1500

Recovery time

transient step

line changes1, 5, 12

TTLINE Input step 17 to 40V dc 4,5,6 All 4.0 ms

Input step 40 to 17V dc 4,5,6 All 4.0

Turn on overshoot 9 VTonOS IOUT = 0 and ±625mA 4,5,6 All 600 mVpk

Turn on delay 2, 9 TonD IOUT = 0 and ±625mA

4,5,6 All 10 ms

Load fault recovery 12 TrLF 4,5,6 All 10 ms

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AHE28XXD Series

Specifications

Table III. Electrical Performance Characteristics

AHE2815D

Refer Notes to Specifications, refer to page 5

Test Symbol Conditions

-55°C ≤ Tc ≤+125°C

Vin = 28 Vdc ±5%, CL = 0

Unless otherwise specified

Group A

Subgroups

Device

Types

Limits Unit

Min Max

Output voltage VOUT I

OUT = 0 1 All ±14.85 ±15.15 V

2,3

±14.70 ±15.30

Output current 9, 11 IOUT V

IN = 17, 28, and 40 V dc 1,2,3 All 0.0 ±500 mA

Output ripple voltage

8, 9

VRIP V

IN = 17, 28, and 40 V dc,

B.W. = dc to 2 mHz

1,2,3 All 60 mVp-p

Output power 4, 9, 11 POUT V

IN =17,28, and 40 V dc 1,2,3 All 15 W

1 35 Line

Regulation 9, 10

VRLINE V

IN = 17, 28, and 40 V dc,

Iout = 0, ±250, and ±500mA 2,3

All

Load

Regulation 9

VRLOAD V

IN = 17, 28, and 40 V dc,

IOUT = 0, ±250,and ±625

1,2,3 All 150 mV

Input current IIN I

OUT = 0, inhibit (pin 2)

tied to input return (pin 10)

1,2,3 All 18 mA

OUT = 0,

inhibit (pin 2) = open

Input ripple current 8 IRIP IOUT = ±500mA

B.W. = DC to 2MHz

1,2,3 All 50 mAp-p

Efficiency EFF IOUT = ±500mA 1 All 80 %

TC = +25°C

Isolation ISO Input to output or any pin

to case (except pin 8)

at 500V dc Tc = +25°C

1 All 100

MΩ

Capacitive load 6, 12 CL No effect on dc

performance, Tc = +25°C

4 All 200 µF

Power dissipation

load fault

PD Overload, TC = +25°C 3 1 All 6.0

Switching frequency 9 FS IOUT = ±500mA 4,5,6 01 225 275 KHz

02 225 245

03 250 275

Output response to

step transient load

changes 7

VOTLOAD 50% load to/from100%load 4 All -300 +300

5,6 -450 +450 mVpk

No load to/from 50% load 4 All -500 +500

5,6 -750 +750

Input voltage -0.5V to +50VDC

Soldering temperature 300°C for 10 seconds

Operating case temperature -55°C to +125°C

Storage case temperature -65°C to +135°C

Absolute Maximum Ratings

www.irf.com 7

AHE28XXD Series

Table III. Electrical Performance Characteristics - continued

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 2.0µs and 10µs.

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 2.0µs and 10µs.

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.

AHE2815D

Test Symbol Conditions

-55°C ≤Tc ≤+125°C

Vin = 28 Vdc ±5%, CL = 0

unless otherwise specified

Group A

Subgroups

Device

Types

Limits Unit

Min Max

Recovery time

step transient

load changes 1, 7

TTLOAD 50% load to/from 100% load 4 All 70 µs

5,6 100

No load to 50% load 4,5,6 All 1500

50% load to no load 4,5,6 All 5.0 ms

Output response

transient step

line changes 5, 12

VOTLINE Input step 17 to 40V dc

4,5,6 All 1500 mV pk

Input step 40 to 17V dc 4,5,6 All -1500

Recovery time

transient

step line

changes 1, 5, 12

TTLINE Input step 17 to 40V dc 4,5,6 All 4.0 ms

Input step 40 to 17V dc 4,5,6 All 4.0

Turn on

overshoot 9

VTonOS IOUT = 0 and ±500mA 4,5,6 All 600 mV pk

Turn on delay 2, 9 TonD IOUT = 0 and ±500mA

4,5,6 All 10 ms

Load fault

recovery 12

TrLF 4,5,6 All 10 ms

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AHE28XXD Series

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.

Block Diagram

Application Information

Inhibit Function

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).

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.

International Rectifier offers an option that provides

synchronization of multiple AHE/ATW converters, thus

eliminating this type of noise.

Typical Synchronization Connection

AHE28xxS

AFC461

AFV461

AHE28xxS

or Other

Compatable

+ In

Case

Return

Return Return

Return

Output

MSTR

SLV

+ In

Return

Output

Return

System

Bus

+Vout

Pulse Width

Modulator

EMI

Filter

+Input

Input

Return

Drive 1

Drive 2

Sync

5 -Vout

Regulator

Output

Return

Inhibit

Input

Error Amp

& Reference

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AHE28XXD Series

Pin Designation

Mechanical Outlines

Flanged Non-Flanged

2.560

1.110

0.040 D X

0.26 L Pins

4 X 0.400

=1.600

2.880

Max

2.110

Max

0.495

Max

0.050

610987

0.800

123 54

2.11

0.495

Ø 0.162

2 Holes

Pin # Designation

1 + Input

2 Inhibit Input

3 + Output

4 Output Return

5 - Output

6NC

7NC

8 Case Ground

9 NC or Sync.

10 Input Return

Standard Microcircuit Drawing Equivalence Table

Standard Microcircuit Vendor Cage IR Standard

Drawing Number Code Part Number

5962-92040 52467 AHE2812D

5962-91575 52467 AHE2815D

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AHE28XXD Series

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

Part Numbering

Notes:

 Best commercial practice

 Sample tests at low and high temperatures

 -55°C to +105°C for AHE, ATO, ATW

Device Screening

Requirement MIL-STD-883 Method No Suffix ES

HB CH

Temperature Range -20°C to +85°C -55°C to +125°C

-55°C to +125°C -55°C to +125°C

Element Evaluation MIL-PRF-38534 N/A N/A N/A Class H

Non-Destructive

Bond Pull

Internal Visual 2017

Yes Yes Yes

Temperature Cycle 1010 N/A Cond B Cond C Cond C

Constant Acceleration 2001, Y1 Axis N/A 500 Gs 3000 Gs 3000 Gs

PIND 2020 N/A N/A N/A N/A

Burn-In 1015 N/A 48 hrs@hi temp 160 hrs@125°C 160 hrs@125°C

Final Electrical MIL-PRF-38534 25°C 25°C

-55°C, +25°C, -55°C, +25°C,

( Group A ) & Specification +125°C +125°C

PDA MIL-PRF-38534 N/A N/A N/A 10%

Seal, Fine and Gross 1014 Cond A Cond A, C Cond A, C Cond A, C

Radiographic 2012 N/A N/A N/A N/A

External Visual 2009

Yes Yes Yes

N/A N/A2023 N/A N/A

AHE 28 15 D F /CH - MSTR

Model

Input Voltage

Nominal

28 = 28V

Output

D = Dual

Output Voltage

05 = ±5V

12 = ±12V

15 = ±15V

Screening Level

(Please refer to Screening Table)

No Suffix, ES, HB, CH

Sync Option

MSTR = Master

SLV = Slave

Omit for Standard

Package Option

F = Flange

Blank = Non-Flanged