ASA2815D/ESPBF - International Rectifier

01/11/07

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ASA28XXD SERIES

Description

Up To 5.0W Output Power

±5V, ±12V, ±15V Outputs

High Reliability

Wide Input Voltage Range -16V To 40V

Indefinite Short Circuit and Overload Protection

Popular Industry Standard Pin-Out

Military Screening

Parallel Seam Welded Package

No External Capacitors Required

Input Voltage Surge Protected to MIL-STD-704

Under Voltage Lockout

 Standard Microcircuit Drawings Available

Features

28V Input, Dual Output

The ASA28XXD Series of DC/DC converters are high

reliability thick film hybrid converters that use flyback

topology operating at a nominal frequency of 550KHz.

High input to output isolation is achieved through the

use of transformers in the flyback power and feed back

circuits.

The advanced feedback design provides fast loop

response for superior line and load transient

characteristics and offers greater reliability than devices

incorporating optical feedback circuits.

This device is designed to meet MIL-STD-704 input

requirements offering full performance over a 16V to

40V input range. Output Power of up to 5W is available

for either balanced or unbalanced loads.

Connecting the inhibit pin (pin 5) to the input common

(pin 7) 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. The

open circuit voltage of the inhibit pin is 11.5 ± 0.5V.

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.

HYBRID-HIGH RELIABILITY

DC/DC CONVERTER

ASA

PD-94540A

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ASA28XXD Series

Specifications

For Notes to Specifications, refer to page 3

ASA2805D/XX

ASA2812D/XX

ASA2815D/XX

TEST

Conditions

-55° ≤ TC ≤+125°C

VIN = 28V dc ±5% CL = 0

unless otherwise sp ecified

Group A

Subgroups Min Max Min Max Min Max Unit

1 ±4.95 ±5.05 ±11.88 ±12.12 ±14.85 ±15.15

Output voltage IOUT = 0 2, 3 ±4.90 ±5.10 ±11.76 ±12.24 ±14.70 ±15.30

Output current 1, 2 V

IN = 16, 28, and 40 V dc

either output

1, 2, 3 200 1000 84 333 67 267 mA

Output ripple voltage 3, 4 V

IN = 16, 28 and 40 V dc 1, 2, 3 470 200 290

mV PP

Line regulation 4 V

IN = 16, 28, and 40 V dc

IOUT = 0, 50%, 100% IMAX

1, 2, 3 50 50 50 mV

Load regulation 4 V

IN = 16, 28, and 40 V dc

IOUT = 0, 50%, 100% IMAX

1, 2, 3 50 50 50 mV

Cross regulation 5 20% to 80% load change 1, 2, 3 15 8.0 8.0 %

IOUT = 0

Pin 5 connected to pin 7

12 12 12

Input current

IOUT = 0 Pin5 open

1, 2, 3

Input ripple current 3, 4 I

OUT = IMAX 1, 2, 3 100 100 100

mA PP

1, 3 70 71 71

Efficiency 4 I

OUT = IMAX

2 66

Isolation Input to output or any pin to

case (except pin 8) at 500 V

dc, Tc = +25° C

1 100 100 100 MΩ

Capacitive load 6, 7 No effect on dc performance,

total for both outputs 4 200 200 200

µF

Overload 8 4.0 4.0 4.0

Power dissipation load fault

Short circuit

1, 2, 3

2.0

Switching frequency 4 I

OUT = IMAX 4, 5, 6 500 600 500 600 500 600 KHz

IOUT = 50%  100% IMAX -400 +400 -400 +400 -400 +400

Output response to step

transient load changes 4, 9

IOUT = 0  50% IMAX

4, 5, 6

-800 +800 -800 +800 -800 +800

mV pk

IOUT = 50%  100% IMAX 100 100 100

Recovery time, step

transient load changes

4, 9, 10 IOUT = 0  50% IMAX

4, 5, 6

2000 2000 2000

µs

Output response transient

step line changes 4, 7, 11 VIN =16 40Vdc,IOUT= IMAX 4, 5, 6 -750 +750 - 750 +750 -750 +750 mV pk

Recovery time transient step

line changes

4, 7, 10, 11

VIN=16 40Vdc, IOUT= IMAX 4, 5, 6 1200 1200 1200

µs

Turn on overshoot 4 I

OUT = 0 and IMAX 4, 5, 6 600 600 600 mV pk

Turn on delay 4, 12 I

OUT = 0 and IMAX 4, 5, 6 25 25 25 ms

Load fault recovery 7 4, 5, 6 25 25 25 ms

Input voltage -0.5V to +50VDC Continous, 80V, 100 msec

Power output Internally limited ( 6.5W typical )

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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ASA28XXD Series

Notes to Specifications

1. Parameter guaranteed by line, load, and cross regulation tests.

2. Up to 80% of full power is available from either output provided the total output does not exceed 5W.

3. Bandwidth of DC to 20MHz is guaranteed by design. Tested for 20KHz to 2MHz.

4. Load current split equally between +VOUT and -VOUT.

5. 1.0W load on output under test, 1.0W to 4.0W load change on other output.

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. Parameter shall be tested as part of design characterization and after design or process changes. Thereafter, parameters shall

be guaranteed to the limits specified.

8. An overload is a condition with a load in excess of rated but less than that necessary to trigger the short circuit protection and is

the condition of maximum power dissipation.

9. Load step transition time between 2µs and 10µs.

10. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1% of VOUT at 50% load.

11. Input step transition time between 2µs and 10µs.

12. Turn-on delay time measurements is for either a step application of power at the input or the removal of ground connection from

enable pin (pin 5) with power applied to the input.

Block Diagram

Controller

Error

Amplifier

Case

Output

Return

+Output

Inhibit

Input

Return

+Input

-Output

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ASA28XXD Series

0.800

±.005

1.075

0.220

0.270

1.075

0.800

0.025 ± .003 Dia Pins

12345

687

Mechanical Outline

Pin Designation

Standard Microcircuit Drawing Equivalence Table

Standard Microcircuit IR Standard

Drawin

Number Part Number

5962-94649 ASA2815D

5962-95648 ASA2812D

Pin # Designation

1 + Output

2 Output Return

3 - Output

4NC

5 Inhibit

6 + Input

7 Input Return

8 Case Ground

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ASA28XXD Series

Part Numbering

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

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

ASA 28 05 D /CH

Model

Input Voltage

28 = 28V

Output Voltage

05 = ±5V

12 = ±12V

15 = ±15V

Output

D = Dual

Screening Level

(Please refer to Screening Table)

No Suffix, ES, HB, CH