5962-9204001HXX - International Rectifier

04/01/04

www.irf.com 1

HYBRID-HIGH RELIABILITY

DC/DC CONVERTERS

AHE28XXD SERIES

Description

n 17 to 40 VDC Input Range

n 28 VDC Nominal Input

n ± 5.0V, ±12V and ±15V Outputs Available

n Indefinite Short Circuit and Overload

Protection

n 12.9 W/in3 Power Density

n 15 Watts 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)

Features

AHE

28V Input, Dual Output

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.

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 +5.0V, +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 available in four screening

grades to satisfy a wide range of requirements . The CH

grade is fully compliant to the requirements of MIL-

PRF-38534 for class H. The HB grade is processed

and screened to the class H requirement, but may not

be necessarily meet all of the other MIL-PRF-38534

requirements, e.g., element evaluation and Periodic

Inspection (P.I.) are not required. Both grades are tested

to meet the complete group “A” test specification over

the full military temperature range without output power

deration. Two grades with more limited screening are

also available for use in less demanding applications.

Variations in electr ical, mechanical and screening can

be accommodated. Contact IR Santa Clara for special

requirements.

PD - 94555A

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AHE28XXD Series

Specifications

For Notes to Specifications, refer to page 3

T able I. Electrical Performance Characteristics

AHE2805D

n

Input Vol tage -0.5V to 50V

Soldering Temperat ure 300°C for 10 seconds

Case Temperature Operating -55°C to +125°C

Storage -65°C t o +135°C

ABSOLUTE MAXIMUM RA TINGS

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

50

mV

Load

Regulation 9

VRLOAD V

IN = 17, 28, and 40 V dc,

IOUT = 0, ±313,and ±625

mA

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

I

OUT = 0,

inhibit (pin 2) = open

40

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

W

Short circuit, TC = +25°C 1 6

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 mVpk

5,6 -450 +450

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

5,6 -750 +750

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AHE28XXD Series

Notes to Specifications

T able I. Electrical Performance Characteristics - continued

1 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.

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

5 Input step transition time between 2 and 10 microseconds.

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 and 10 microseconds.

8 Bandwidth guaranteed by design. Tested for 20 KHz to 2MHz.

9 Tested at each output.

10 When operating with unbalanced loads, at least 25 percent 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 Ta ble I.

AHE2805D

Test Symbol Conditions

-55° ≤Tc ≤+125°C

Vin = 28 V d c ±5%, CL= 0

unless othe rwise

specified

Group A

Subgroups

Device

Types Limits Unit

Min Max

Recovery time step

transient load

changes 1, 7

TTLOAD 50% load to/from 10 0%

load 4 All 70

µs

5,6 100

No load t o 50 % load 4,5,6 A ll 1500

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

Outpu t r es ponse

transient s tep line

changes 5, 12

VOTLINE Inpu t s tep 17 to 40V dc

4,5,6 All 1200 mVpk

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

Recovery time

transient step

line changes1, 5, 12

TTLINE Inpu t step 17 to 40V dc 4,5, 6 All 4 ms

Inpu t step 40 to 17V dc 4,5, 6 All 4

Turn on ov er shoot 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 f ault rec ov ery 12 TrLF 4,5,6 All 10 ms

4www.irf.com

AHE28XXD Series

Specifications AHE2812D

n

Input Voltage -0.5V to 50V

Soldering Temperat ure 300°C for 10 seconds

Case Temperature Operating -55°C to +125°C

Storage -65°C t o +135°C

ABSOLUTE MAXIMUM RA TINGS

T able 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

60

mV

Load

Regulation 9

VRLOAD V

IN = 17, 28, and 40 V dc,

IOUT = 0, ±313,and ±625

mA

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

I

OUT = 0,

inhibit (pin 2) = open

40

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

W

Short circuit, TC = +25°C 1 6

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 mVpk

5,6 -450 +450

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

5,6 -750 +750

www.irf.com 5

AHE28XXD Series

T able 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 ±.1 percent of VOUT at 50 percent

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

5 Input step transition time between 2 and 10 microseconds.

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 and 10 microseconds.

8 Bandwidth guaranteed by design. Tested for 20 KHz to 2MHz.

9 Tested at each output.

10 When operating with unbalanced loads, at least 25 percent 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 Ta ble I.

AHE2812D

Test Symbol Conditions

-55° ≤Tc ≤+125°C

Vin = 28 V dc ±5%, CL= 0

unless othe rwise

specified

Group A

Subgroups

Device

Types Limits Unit

Min Max

Recover y 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% l oad 4,5,6 A ll 1500

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

Output response

transient s tep line

changes 5, 12

VOTLINE Input s tep 17 to 40 V dc

4,5,6 All 1200 mVpk

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

Recovery time

transient step

line changes1, 5, 12

TTLINE Input s tep 17 to 40V dc 4, 5,6 All 4 ms

Input step 40 to 17V dc 4, 5,6 A l l 4

Turn on ov er shoot 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 f ault recovery 12 TrLF 4,5,6 All 10 ms

6www.irf.com

AHE28XXD Series

Specifications

T able 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

Unle s s othe rw ise specifi ed

Group A

Subgroups

Device

Types Limits Unit

Min Max

Output v o lt age VOUT I

OUT = 0 1 All ±14.85 ±15.15 V

2,3

±14.70 ±15.30

Output c u rrent 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 po wer 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 75 mV

Load

Regulation 9 VRLOAD V

IN = 17, 2 8, and 40 V dc,

IOUT = 0, ±250,and ±625 m A 1,2,3 All 150 mV

Input curr ent IIN I

OUT = 0, inhibit (pin 2)

tied to input return (pin 10) 1,2,3 All 18 mA

I

OUT = 0,

inhibit (pin 2) = open 40

Input ripp le curr ent 8 IRIP IOUT = ±500mA

B.W . = DC to 2MH z 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 50 0V dc Tc = +25°C

1 All 100

MΩ

Capacitive load 6, 12 CL No effect on dc

performanc e, Tc = +25°C 4 All 200 µF

Power dissipation

load fault PD Overload, TC = +25°C 3 1 All 6

W

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

02 225 245

03 250 275

Output res p ons e to

step transient load

changes 7

VOTLOAD 50% load to/from1 00 %load 4 Al l -300 +300 mV pk

5,6 -450 +450

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

5,6 -750 +750

n

Input Voltage -0.5V to 50V

Soldering Temperat ure 300°C for 10 seconds

Case Temperature Operating -55°C to +125°C

Storage -65°C t o +135° C

ABSOLUTE MAXIMUM RA TINGS

www.irf.com 7

AHE28XXD Series

T able 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 ±.1 percent of VOUT at 50 percent

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 16 Vdc input, derate output power by 33 percent.

5 Input step transition time between 2 and 10 microseconds.

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 and 10 microseconds.

8 Bandwidth guaranteed by design. Tested for 20KHz to 2MHz.

9 Tested at each output.

10 When operating with unbalanced loads, at least 25 percent 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.

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% l oad 4,5,6 Al l 1500

50% load to no load 4,5,6 Al l 5 ms

Output response

transient step

line changes 5, 12

VOTLINE Input step 17 t o 40V dc

4,5,6 All 1500 mV pk

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

Recovery time

transient

step li ne

changes 1, 5, 12

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

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

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

8www.irf.com

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 VDC.

AHE28XXD 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 con verter

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.

T ypical Synchronization Connection

AHE28xxS

AFC461

or

AFV461

AHE28xxS

or Other

Compatable

+ In

Case

Return

Return Return

Return

Out

p

ut

Out

p

ut

Out

p

ut

MSTR

SLV

+ In

Return

Out

p

ut

Return

System

Bus

3

4

+Vout

Retur

n

Pulse W idth

Modulator

EMI

Filter

1

2

10

+Input

Enable

Input

Return

FB

Drive 1

Drive 2

9

Sync

E rror A mp

& Reference

5-Vout

Re

g

ulator

www.irf.com 9

AHE28XXD Series

Pin Designation ( AHE2805D, AHE2812D & AHE2815D )

AHE28XXD Case Outlines

Flanged Non-Flanged

Part Numbering

2.560

1.110

0.040 D X

0.26 L P ins

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

0.495

Ø 0.162

2 Holes

Pin No. Designation

1 Positive Input

2 Inhibit Input

3 Positive Output

4 Output Common

5 Nagative Output

6 N/C

7 N/C

8 Case Ground

9 N/C or Sy nc.

10 Input Common

AHE 28 05 D F / CH - MS TR

Model

Input Volta

g

e

28 = 28V

Output Volta

g

e

05= 5V, 12=12V, 15=15V Outputs

S = Single, D = Dual

Screenin

g

– , ES, HB, CH

Packa

g

e Options

F = Flange

Omit for Standard

Sync Option

MSTR = Master

SLV = Slave

10 www.irf.com

AHE28XXD Series

Available Standard Military Drawing (SMD) Cross Reference

Available Screening Levels and Process V ariations for AHE28XXD Series

* Per Commercial Standards

Requirement MIL-STD-883

Method No

Suffix ES

Suffix HB

Suffix CH

Suffix

Temperature

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

Element

Evaluation MIL-PRF-38534

Internal Visual 2017 ∗ Yes Yes Yes

Temperature

Cycle 1010 Cond B Cond C Cond C

Constant

Acceleration 2001 500g Cond A Cond A

Burn-in 1015

48hrs @ 85°C 96hrs @ 125°C 160hrs @ 125°C 160hrs @ 125°C

Final Electrical

(Group A) MIL-PRF-

38534

25°C 25°C -55, +25, +125°C -55, +25, +125°C

Seal, Fine &

Gross 1014 Cond C Cond A, C Cond A, C Cond A, C

External

Visual 2009 ∗ Yes Yes Yes

Standard Vendor Vendor

Military drawing CAGE Similar

PIN Code PIN

5962-9204001HXX 52467 AHE2812D/CH

5962-9204001HZX 52467 AHE2812DF/CH

5962-9204002HXX 52467 AHE2812D/CH-SLV

5962-9204002HZX 52467 AHE2812DF/CH-SLV

5962-9204003HXX 52467 AHE2812D/CH-MSTR

5962-9204003HZX 52467 AHE2812DF/CH-MSTR

Standard Vendor Vendor

Mili ta ry drawing CAGE Sim ilar

PIN Code PIN

5962-9157501HXX 52467 AHE2815D/CH

5962-9157501HZX 52467 AHE2815DF/CH

5962-9157502HXX 52467 AHE2815D/CH-SLV

5962-9157502HZX 52467 AHE2815DF/CH-SLV

5962-9157503HXX 52467 AHE2815D/CH-MSTR

5962-9157503HZX 52467 AHE2815DF/CH-MSTR

48hrs

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. 04/2004