Datasheet ATW28XXD Datasheet (IOR)

查询5962-9161301HZX供应商

PD - 94557

A TW28XXD SERIES

ADVANCED ANALOG
HYBRID-HIGH RELIABILITY
DC/DC CONVERTERS

Description

The ATW28XXD 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-704 input requirements, these devices op­erate with a nominal 28 VDC inputs with ±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 270KHz. 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 elements in
the feedback circuits.

Three standard temperature grades are offered. Refer
to Part Number section for more severe environments.

Manufactured in a facility fully qualified to MIL-PRF­38534, 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 MIL­PRF-38534 for class H. The HB grade is processed
and screened to the class H requirement, but may not
necessarily meet all of the other MIL-PRF-38534 re­quirements, e.g., element evaluation and Periodic In­spection (PI) 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 a more limited screening
are also available for use in less demanding applica­tions. Variations in electr ical, mechanical and screen­ing can be accommodated. Contact Advanced Analog
for special requirements.

28V Input, Dual Output

ATW

Features

n 18 to 40 VDC Input Range (28 VDC Nominal)

n

±12V and ±15V Outputs Available

n Indefinite Short Circuit and Overload
Protection

n 22.8 W/in
n 30 W
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 85%
n Shutdown from External Signal
n Full Military Screening
n 200,000 hour MTBF at 85°C

n MIL-PRF-38534 Compliant Versions

Available

3

Power Density

Output Power

www.irf.com 1

10/24/02

ATW28XXD Series

Specifications

ABSOLUTE MAXIMUM RATINGS

Input Voltage -0.5V to 50V

A TW2812D

Soldering Temperature 300°C for 10 seconds
Case Temperature Operating -55°C to +125°C
Storage -65°C to +135°C

T able I. Electrical P erformance Characteristics

Test Symbol Conditions

-55°C ≤Tc ≤+125°C

Vin = 28 Vdc ±5%, C

Unless otherwise specified

= 0

L

Group A

Subgroups

Min Max
Output voltage V
2,3

Output current

1, 2

Output ripple vol t ag e 3
Line regulation 4

I

OUT

VIN = 18, 28, and 40 V dc,

I

OUT

VIN = 18, 28, and 40 V dc,

V

RIP

VR

LINE

= 0 1 All

OUT

each output
B.W. = 20Hz to 2MHz

VIN = 18, 28, and 40 V dc,

Iout = 0,1250, and 2500mA

1,2,3 All 250 2250 mA
1,2,3 All 85 mVp-p

1 All 30 mV

2,3 60

VR

Load regulation 4
Cross regulation 5

Input current IIN I
I

Input ripple current

3, 4

Efficiency 4

Isolation ISO Input to output or any pin

VIN = 18, 28, and 40 V dc,

LOAD

VR

CROSS

I

I

RIP

I

E

FF

= 0, 1250, and 2500mA

I

OUT

10% to 90% load change 1,2,3 All 3.5 %

= 0, inhibit (pin 8)

OUT

tied to input return (pin 10)

= 0,inhibit (pin 8)= open 50

OUT

= 2500mA

OUT

B.W. = 20Hz to 2MHz

= 2500mA 1 All 80 %

OUT

T

= +25°C

C

1,2,3 All 120 mV

1,2,3 All 18 mA

1,2,3 All 50 mAp-p

1 All 100

to case (except pin 7) at

Capacitive load

6, 7

500 V dc Tc = +25°C

CL No effect on dc

performance, Tc = +25°C,

4 All 200 µF

total for both out put s
Power diss ip ation
load fault

Switching frequency 4

PD

I

F

S

Overload, T

Short circui t, T

= 2500mA 4,5,6 01 250 300 KHz

OUT

= +25°C 8

C

= +25°C

C

1 All 12 W

9

02 250 270
03 275 300
Output response to s tep
transient load
changes

4, 9

1250mA to/from 2500mA 4,5,6 All -400 +400 mV pk

VO

TLOAD

0mA to/from 2500mA 4,5,6 All -800 +800
Recovery time step
transient load
changes

4, 9, 10

1250mA to/from 2500mA 4,5,6 All 70 µs

TT

LOAD

0mA to/from 1250mA 4,5,6 All 500
1250mA to/from 0mA 4,5,6 All 5 ms

Device

Types

Limits Unit

11.88 ±12.12

±

11.76 ±12.24

±

V

MΩ

For Notes to Specifications, refer to page 3

2 www.irf.com

ATW28XXD Series

T able I. Electrical P erformance Characteristics - continued

Test Symbol Conditions

-55°C ≤Tc ≤+125°C

Vin = 28 Vdc ±5%, C

unless otherwise specified

= 0

L

Group A

Subgroups

Device

Limits Unit

Types

A TW2812D

Min Max

Output response
transient step line
changes

4, 7, 11

Recovery time
transient step line

4, 7, 10, 11

change
Turn on overshoot 4
Turn on delay

4, 12

Load fault recovery 7

Input step from/to 18 to 40

VO

TLINE

Vdc, I

= 2500mA

OUT

Input step from/to 18 to 40

TT

LINE

Vdc, I

= 2500mA

OUT

VTon

I

OS

Ton

I

D

Tr

4,5,6 All 14 ms

LF

0 and 2500mA 4,5,6 All 750 mV pk

OUT =

= 0 and 2500mA

OUT

4,5,6 All -800 +800 mV pk

4,5,6 All 4000

4,5,6 All 14 ms

s

µ

Weight Flange 75 grams

Notes to Specifications

1 Parameter guaranteed by line, load and cross regulation tests.
2 Up to 90% of full power is available from either output provided the total output does not exceed 30W.
3 Bandwidth guaranteed by design. Tested for 20KHz to 2MHz.
4 Load current split equally between +V
5 Three-watt load on output under test, 3 watt to 27 watt 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 in Table I.
8 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.
9 Load step transition time between 2 and 10 microseconds.
10 Recovery time is measured from the initiation of the transient to where V
percent of V
11 Input step transition time between 2 and 10 microseconds.

at 50 percent load.

OUT

12 Tur n-on delay time measurement is for either a step application of power at the input or the removal of
ground signal from the inhibit pin (pin 8) while power is applied to the input.

OUT

and –V

OUT

.

has returned to within ±1

OUT

www.irf.com 3

ATW28XXD Series

Specifications

ABSOLUTE MAXIMUM RATINGS

Input Voltage -0.5V to 50V

A TW2815D

Soldering Temperature 300°C for 10 seconds
Case Temperature Operating -55°C to +125°C
Storage -65°C to +135°C

T able II. Electrical P erformance Characteristics

Test Symbol Conditions

-55°C ≤Tc ≤+125°C

Vin = 28 Vdc ±5%, C

Unless otherwise specified

= 0

L

Group A

Subgroups

Device

Types

Limits Unit

Min Max
Output voltage V
I

Output current

11, 13

Output ripple voltage 8
Output Power

Line regulati o n
2,3 All 75 mV

Load regulation

4, 11

9, 10

9, 10

Input current IIN I
I
Input rippl e c urrent I
Efficiency EFF
Isolation ISO Inpu t t o output or any pin

VIN = 18, 28, and 40 Vdc 1 All

OUT

VIN = 18, 28, and 40 V dc 1,2,3 All 0.200 2000 mADC

I

OUT

V

VIN = 18, 28, and 40 V dc ,

RIP

P

OUT

VR

LINE

VR

LOAD

I

RIP

= 0 2,3 All

OUT

1,2,3 All 85 mVp-p

B.W. = DC to MHz

VIN = 18, 28, 40 Vdc 1,2,3 All 30 W

VIN = 18, 28, and 40 V dc ,

1 All 35 mV

Iout = 0, 1000, and 2000mA

VIN = 18, 28, and 40 V dc ,

= 0, 1000, and 2000mA

I

OUT

= 0, inhibit (pin 8) 1,2,3 All 12 mADC

OUT

= 0, inhibit (pin 8) = op en 1,2,3 All 30 mADC

OUT

= 2000mA 1,2,3 All 60 mAp-p

OUT

I

= 2500mA TC = 25°C

OUT

1,2,3 All 150 mV

1 All 80 %
1 All 100

14.85 ±15.15

±

14.70 ±15.30

±

V

DC

VDC

MΩ

to case (except pin 8) at

Capacitiv e l oad

6, 12

Power dissipation
load fault

Switching frequency FS I
1,2,3 02 230 245 KHz

500V dc Tc = 25°C

No effect on d c performance,

C

L

Tc = 25°C

PD

Overload, T
Short circuit, T

= 2000mA 1,2,3 01 237 263 KHz

OUT

= +25°C 3

C

= +25°C

C

4 All 500 µF
1 All 9 W
1 All 9 W

1,2,3 03 250 265 KHz
Output response to step
transient
load changes

7, 9, 10

VO

50% load t o/from 100% load 4,5,6 All - 30 0 +300 mV pk

TLOAD

No load to 100% load 4,5,6 All - 80 0 -800 mV pk
100% load to no load 4,5,6 All +800 +800 m V pk
Recovery time step
transient load changes

TT

50% load to/f r om 10 0% load 4,5,6 All 25 µs

1, 7

LOAD

No load to 50% load 4,5, 6 All 500 µs
50% load to no load 4,5,6 Al l 7 ms

For Notes to Specifications, refer to page 5

4 www.irf.com

ATW28XXD Series

T able II. Electrical Performance Characteristics - continued

Test Symbol Conditions

-55°C ≤Tc ≤+125°C

Vin = 28 Vdc ±5%, C

unless otherwise specified

= 0

L

Group A

Subgroups

Device

Limits Unit

Types

A TW2815D

Min Max

Output response
transient step line
changes

5, 12

VO

Input step from/to 18 to

TLINE

40VDC

4,5,6 All +180 mV pk

Input step from 40 to18 VDC 4,5,6 All -600 mV pk
Recovery time
transient step line
changes

1. 5, 12

Input step from 40 to 18 VDC 4,5,6 A ll 400
Turn on overshoot VTonOS I
Turn on delay 2

Load fault recovery 12

Input step from/to 18 to 40

TT

LINE

VDC

0 and 2000mA 4,5,6 All 750 mV pk

OUT =

I

Ton

D

VIN = 18 to 40 VDC 4,5,6 All 12 ms

Tr

LF

= 0 and 2000mA

OUT

4,5,6 All 400

4,5,6 All 12 ms

s

µ

s

µ

Weight Flange 75 grams

Notes to Specifications

1 Recovery time is measured from the initiation of the transient to where V
2 Tur n-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 8) 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 Above +125°C case, derate output power linearly to 0 at +135°C case.
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 will 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 Load current split equally between +V
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.
13 Up to 90% of full power is available from either output provided the total output does not exceed 30 watts.

OUT

and –V

OUT

.

has returned to within ±1% of V

OUT

at 50% load.

OUT

www.irf.com 5

ATW28XXD Series

A TW28XXD Block Diagram

3

+Vout

1

+Input

8

Enable

2

EMI

Filter

Pulse Width
M o d u lator

Drive 1

Drive 2

FB

Sync
Input

Return

10

Application Information

Inhibit Function

Connecting the inhibit input (Pin 8) 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.

EMI Filter

An optional external EMI filter (AFC461) is available that will
reduce the input ripple current to levels below the limits
imposed by MIL-STD-461B CEO3.

Device Synchronization

Whenever multiple DC/DC converters are utilized in a single
system, significant low frequency noise may be generated
due to the slight differences 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).
Advanced Analog offers an option, which allows synchroni­zation of multiple AHE/ATW type 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.

Return

4

-Vout

5

Err o r A mp
& R e fe r e n ce

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 2) of the master device is connected to the
synchronization input (pin 2) 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 Par t Number section.

T ypical Synchronization Connection

System

Bus

+ In

Return

AFC 461

or

AFV461

Output

Return

+ In
Case
Return

+ In
Case
Return

+ In
Case
Return

ATW 28xxS

ATW 28xxD

Com patable

ATW 28xxD

MSTR

or Other

SLV

SLV

Output

Return

Output
Return
Output

Output
Return
Output

6 www.irf.com

A TW28XXD Case Outlines

0

ATW28XXD Series

1.000

0.040 D X

0.26 L Pins

123 54

4 X 0.400

=1.600

610987

0.500

Pin Designation

Pin No. Designation

1 Positive Input
2 N/C Standard or

Sync. ( Optional )
3 Positive Output
4 Output Return
5 Negative Output
6 N/C
7 Case Ground
8 Inhibit
9 N/C

10 Input Return

Enable

0.05

Max

1.95

2.360

1.350
Max

Part Numbering

ATW 28 15 D / CH - MSTR

Model
Inp ut Vo lta ge

28 = 28V Nom inal

O u tpu t Vo ltag e

Single - 05, 12, 15VDC
Dual - 12 = ±12V, 15 = ±15V

2.70
Max

Screening

–

, ES, HB, CH

Outputs

S = Single
D = Dual

Sync Option

MSTR = Master
SLV = Slave
Om it for Standard

www.irf.com 7

ATW28XXD Series

Availab le Screening Levels and Process V ariations for A TW28XXD Series

Requirement MIL-STD-883

Temperature
Range
Element
Evaluation
Internal Visual 2017

Temperature
Cycle
Constant
Acceleration
Burn-in 1015

Final Electrical
(Group A)
Seal, Fine &
Gross
External
Visual

* Per Commercial Standards

Method

MIL-PRF-38534

1010, Cond C Cond A Yes Yes
2001, Cond A 500g 5,000g 5, 000g

MIL-PRF-38534

& Specification

1014 Yes Yes Yes
2009

No

Suffix

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

-55°C

∗

48hrs @ 85°C 48hrs @ 105°C 160hrs @ 125°C 160hrs @ 125°C

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

∗

ES

Suffix

Yes Yes Yes

Yes Yes Yes

Availab le Standard Military Drawing (SMD) Cross Reference

Standardized Vendor Vendor

Military Drawing CAGE Similar

Pin Number Pin

5962-9210901HZX 52467 ATW2812D/CH
5962-9210902HZX 52467 ATW2812D/CH-SLV
5962-9210903HZX 52467 ATW2812D/CH-MSTR
5962-9161301HZX 52467 ATW2815D/CH
5962-9161302HZX 52467 ATW2815D/CH-SLV
5962-9161303HZX 52467 ATW2815D/CH-MSTR

Code

HB

Suffix

CH

Suffix

WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: [phone]

ADVANCED ANALOG: 2270 Martin Av., Santa Clara, California 95050, Tel: [phone]

Data and specifications subject to change without notice. 10/02

Visit us at www.irf.com for sales contact information.

8 www.irf.com