Datasheet ATR28XXD Datasheet (IOR)

PD - 94550

A TR28XXD SERIES

ADVANCED ANALOG
HYBRID-HIGH RELIABILITY
DC/DC CONVERTERS

Description

The ATR28XXD 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 ±12V and ±15V dual
outputs to satisfy a wide range of requirements. The
circuit design incorporates a pulse width modulated
single forward topology operating in the feed-forward
mode at a nominal switching frequency of 550KHz.
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.

Three standard temperature grades are offered with
screening options. Ref er to P art Number section. The y
can be provided in a standard plug-in package for PC
mounting or in a flanged package for more severe en­vironments.

These converters are manufactured in a facility certi­fied to MIL-PRF-38534. All processes used to manu­facture these converters have been qualified to enable
Advanced Analog to deliver compliant devices.

28V Input, Dual Output

ATR

Features

n 16 to 40 VDC Input Range (28 VDC Nominal)

n

±12V and ±15V Outputs Available

n Indefinite Short Circuit and Overload
Protection

n 35 W/in
n 30 Watt Output Power
n Fast Loop Response for Superior Transient

Characteristics
n Operating Temperature Range from -55°C to
+125°C

n Popular Industry Standard Pin-Out
n Resistance Seam Welded Case for Superior

Long Term Hermeticity

n Ceramic Feed-thru Pins
n External Synchronization
n High Efficiency
n Shutdown from External Signal
n Military Screening

3

Power Density

Four screening grades are available to satisfy a wide
range of requirements. The CH grade converters are
fully compliant to MIL-PRF-38534 for class H. The HB
grade converters are processed to full class H screen­ing but do not have class H element evaluation as re­quired by MIL-PRF-38534. Both grades are fully tested
and operate over the full military temperature range
without derating of output power. The ES version is a
full temperature device without the full class H or ele­ment evaluation. The non-suffix device is a low cost

limited temperature range option. Variations in
electrical, mechanical and screening can be ac­commodated.

Extensive computer simulation using complex
modeling enables rapid design modification to
be provided. Contact Advanced Analog with spe­cific requirements.

www.irf.com 1

10/29/02

ATR28XXD Series

Specifications

T

= -55°C to +85°C, V

CASE

ABSOLUTE MAXIMUM RATINGS
Input Voltag e - 0 . 5 V to 50V D C
Power Output Interna lly limited, 36W ty p ical
Solde ring 300°C for 10 seconds
Temperature Range

1

R e c o mme n ded Operating -55°C to +8 5 °C
Maximum Operating -5 5°C to +11 5 °C
S to r a ge -6 5°C to +135°C

PARAMETER

STATIC CHARACTERISTICS
OUTPUT VIN = 16 to 40 VDC
Voltage I
Current 5 0.0
Ripple Full Load, 20KHz to 2MHz 40 85 40 85 mV p-p
Accuracy
Power1 30 30 W
REGULATION
Line
Load
CROSS REGULATION6 V
INPUT
Voltage Range
Current

Ripple Current
EFFICIENCY
ISOLATION Input to output @500 VDC 100 100
CAPACITIVE LOAD No effect on performance

Load Fault Power Dissipation Short Circuit

Switching Frequency I
SYNC Frequency Range7 500 700 500 700 KHz
DYNAMIC CHARACTERISTICS
Step Load Changes
Output
Transient

Recovery 2

Step Line Changes
Output
Transient
Recovery 2

TURN-ON

Overshoot
Delay3
Load Fault Recovery VIN = 16 to 40 VDC 14 25 14 25 ms

Notes to Specifications

1. Above +85°C case temperature, derate output power linearly to 0 at +115°C case.

2. Recovery time is measured from the initiation of the input transient to where V

3. Turn-on delay time measurement is for either an application of power at the input or a signal at the inhibit pin.

4. Load current split equally between +V

5. Up to 90% of Full Power is available from either output provided. The total power output does not exceed 30 watts.

6. 3W load on output under test, 3W to 27W on other output.

7. Sync. Input signal: V

0.8V Max 11.5V Max

= -0.5V Min, V

IL

= +28V ± 5% unless otherwise specified

IN

-55°C ≤ TC ≤ +85°C, V

OUT

T

CASE

VIN = 16 to 40 VDC
I

OUT

IN

No Load, pin 2 = open
Inhibited, pin 2 tied to pin 10
Full Load
Full Load TC = +25°C

TC = +25°C (total for both outputs)
Overload, TC = +25°C

OUT

50% Load to 100% Load
No Load to 50% Load

50% Load to 100% Load
No Load to 50% Load
50% Load to No Load

Input step 16 to 40 VDC
Input step 40 to 16 VDC
Input step 16 to 40 VDC
Input step 40 to 16 VDC

VIN = 16 to 40 VDC
I

OUT

Condition

±

5%, CL=0, unless otherwise

specified

= 0 to Full Load

= 25°C, Full Load

= 0 to Full Load

= 16, 28, and 40 VDC

= Full Load 500 600 500 600 KHz

= O and Full Load

and –V

OUT

= 2.5V Min, 10% to 90% duty cycle,

IN

OUT

= 28 V

IN

.

DC

Min Typ Max Min Typ Max Units

±

11.76 ±12.00 ±12.24 ±14.70 ±15.00 ±15.30

±

11.88 ±12.00 ±12.12 ±14.85 ±15.00 ±15.15

16.0 28.0

82 82 %

100 100
9

ATR2812D

±

1.25

75

120

±

5

40.0
75

25

±

100

±

250
25

500

3

±

180

-600
5
5

0

14

18
50

14

600

25

has returned to within ±1% of V

OUT

0.0

16.0 28.0

9

ATR2815D

25

±

100

±

250
25

500

3

±

180

-600
5
5

0

14

VDC
ADC

VDC

mV
mV

%

5

mVpk

VDC
mADC
mADC

mA p-p

MΩ

µ

F

W
W

mVpk

µ

s

µ

s

ms

mVpk
mVpk

ms

ms

mVpk

ms

at 50% load.

OUT

±

1.0

75

150

±

40.0
75
18
50

14

600

25

2 www.irf.com

ATR28XXD Series

Specifications

T

= -55°C to +125°C, V

CASE

ABSOLUTE MAXIMUM RATINGS
Input Voltage -0.5V to 50VDC
Power Output Internally limited, 36W typical
Soldering 300°C for 10 seconds
Temperature Range

1

Recommend ed O pe rating -55°C to +125°C
Maximum Operating -55°C to +135°C
Storage -65°C to +13 5°C

STATIC CHARACTERISTICS
OUTPUT VIN = 16 to 40 VDC
Voltage I
Current 5 0.0
Ripple Full Load, 20KHz to 2MHz 40 85 40 85 mV p-p
Accuracy
Power1 30 30 W
REGULATION
Line
Load
CROSS REGULATION6 V
INPUT
Voltage Range
Current

Ripple Current
EFFICIENCY
ISOLATION Input to output @500 VDC 100 100
CAPACITIVE LOAD No effect on perfor m ance

Load Fault Power Dissip at ion Short Circuit
Switching Frequency I

SYNC Frequency Range7 500 700 500 700 KHz
DYNAMIC CHARACTERISTICS
Step Load Changes
Output
Transient

Recovery

Step Line Changes
Output
Transient
Recovery

TURN-ON

Overshoot
Delay3
Load Fault Recovery VIN = 16 to 40 VDC 14 25 14 25 ms

Notes to Specifications

PARAMETER

2

2

1. Above +125°C case temperature, derate output power linearly to 0 at +135°C case.

2. Recovery time is measured from the initiation of the input transient to where V

3. Turn-on delay time measurement is for either an application of power at the input or a signal at the inhibit pin.

4. Load current split equally between +V

5. Up to 90% of Full Power is available from either output provided. The total power output does not exceed 30 watts.

6. 3W load on output under test, 3W to 27W on other output.

7. Sync. Input signal: V

0.8V Max, 11.5V Max

= -0.5V Min, V

IL

= +28V ± 5% unless otherwise specified

IN

Condition

-55°C ≤ TC ≤ +125°C, V

V

±5%, CL=0, unless otherwise

DC

specified

= 0 to Full Load

OUT

T

= 25°C, Full Load

CASE

= 16 to 40 VDC

V

IN

I

= 0 to Full Load

OUT

= 16, 28, and 40 VDC

IN

No Load, pin 2 = open
Inhibited, pin 2 tied to pin 10
Full Load
Full Load T

T

C

outputs)
Overload, T

OUT

50% Load to
No Load to 50% Load

50% Load to 100% Load
No Load to 50% Load
50% Load to No Load

Input step 16 to 40
Input step 40 to 16 V
Input step 16 to 40 VDC
Input step 40 to 16 VDC

V

IN

I

OUT

= +25°C

C

= +25°C (total for both

= +25°C

C

= Full Load 500 600 500 600 KHz

100% Load

= 16 to 40 VDC

= O to Full Load

and –V

OUT

= 2.5V Min, 10% to 90% duty cycle

IN

VDC

OUT

= 28

IN

Min Typ Max Min Typ Max Units

±

11.76 ±12.00 ±12.24 ±14.70 ±15.00 ±15.30

±

11.88 ±12.00 ±12.12 ±14.85 ±15.00 ±15.15

16.0 28.0

80 82 79 82 %

100 100

9

DC

.

ATR2812D/ES

25

±

100

±

250
25

500

3

±

180

-600
5
5

0

14

OUT

75

±

75
18
50

14

5

0.0

16.0 28.0

9

±

1.25

120

40.0

600

25

has returned to within ±1% of V

ATR2815D/ES

25

±

100

±

250
25

500

3

±

180

-600
5
5

0

14

±

1.0

75
150

±

5

40.0
75
18
50

14

mVpk

600

25

at 50% load.

OUT

VDC
A

DC

V

DC

mV
mV

%

V

DC

mA

DC

mA

DC

mA p-p

MΩ

µ

F

W
W

mVpk

µ

s

µ

s

ms

mVpk
mVpk

ms
ms

mVpk

ms

www.irf.com 3

ATR28XXD Series

Specifications

T

= -55°C to +125°C, V

CASE

ABSOLUTE MAXIMUM RATINGS
Input Voltage -0.5V to 50VDC
Power Output In ternally limited, 36W typical
Soldering 300°C for 10 seconds
Temperature Range

1

Recommended Operating -55°C to +125°C
Maximum Op erating -55°C to +135°C
Storage -65°C to +135 °C

PARAMETER

STATIC CHARACTERISTICS
OUTPUT VIN = 16 to 40 VDC
Voltage I
Current 5 0.0
Ripple Full Load, 20KHz to 2MHz 40 85 40 85 mV p-p
Accuracy
Power1 30 30 W
REGULATION

4

Line

4

Load
CROSS REGULAT IO N6 V
INPUT
Voltage Range
Current

Ripple Current
EFFICIENCY
ISOLATION Input to output @500 VDC 100 100
CAPACITIVE LOAD No effect on performance

Load Fault Power Dissipation Short Circuit

Switching Frequency I
SYNC Frequency Range7 500 700 500 700 KHz
DYNAMIC CHARACTERISTICS
Step Load Changes
Output4
Transient

Recovery

Step Line Changes
Output
Transient
Recovery

TURN-ON
Delay3

Load Fault Recovery VIN = 16 to 40 VDC 14 25 14 25 ms

Overshoot

2

2

Notes to Specifications

1. Above +125°C case temperature, derate output power linearly to 0 at +135°C case.

2. Recovery time is measured from the initiation of the input transient to where V

3. Turn-on delay time measurement is for either an application of power at the input or a signal at the inhibit pin.

4. Load current split equally between +V

5. Up to 90% of Full Power is available from either output provided. The total power output does not exceed 30 watts.

6. 3W load on output under test, 3W to 27W on other output.

7. Sync. Input signal: V

0.8V Max, 11.5V Max

= -0.5V Min, V

IL

= +28V ± 5% unless otherwise specified

IN

-55°C ≤ TC ≤ +125°C, V

OUT

T

CASE

V

IN

I

OUT

IN

No Load, pin 2 = open
Inhibited, pin 2 tied to pin 10
Full Load
Full Load T

= +25°C (total for both outputs)

T

C

Overload, T

OUT

50% Load to
No Load to 50% Load

50% Load to 100% Load
No Load to 50% Load
50% Load to No Load

Input step 16 to 40
Input step 40 to 16 V
Input step 16 to 40 VDC
Input step 40 to 16 VDC

V

IN

I

OUT

Condition

±5%, CL=0, unless otherwise

specified

= 0 to Full Load

= 25°C, Full Load

= 16 to 40 VDC

= 0 to Full Load

= 16, 28, and 40 VDC

= 28 VDC

IN

Min Typ Max Min Typ Max Units

±

11.76 ±12.00 ±12.24 ±14.70 ±15.00 ±15.30

±

11.88 ±12.00 ±12.12 ±14.85 ±15.00 ±15.15

16.0 28.0

= +25°C

C

= +25°C

C

= Full Load 500 600 500 600 KHz

100% Load

VDC

DC

= 16 to 40 VDC

= O to Full Load

and –V

OUT

= 2.5V Min, 10% to 90% duty cycle

IN

OUT

.

80 82 79 82 %

ATR2812D/HB

75

±

75
18
50

5

0.0

16.0 28.0

±

1.25

120

25

40.0

100 100
9

±
±

500

±180

-600

14

±

100

450

±

250

760

25

70

1500

3

5

1200

-1500
10

5

10

5
0

600

14

25

has returned to within ±1% of V

OUT

9

ATR2815D/HB

18
25

±

100

±

250
25

500

3

±180

-600
5
5

0

14

±

1.0

75
150

±

5

40.0
75
18
50

14

±

450

±

750
70

1500

5

1500

-1500
10
10

600

25

at 50% load.

OUT

V

DC

ADC
V

DC

mV
mV

%

V

DC

mA
mA

mA p-p

MΩ

µ

F

W
W

mVpk
mVpk

µs
µ

s

ms

mVpk
mVpk

ms
ms

mVpk

ms

DC
DC

4 www.irf.com

ATR28XXD Series

Specifications

T

= -55°C to +125°C, V

CASE

= +28V ± 5% unless otherwise specified

IN

ABSOLUTE MAXIMUM RATINGS
Input Voltage -0.5V to 50VDC
Power Output Internally limited, 36W typical
Soldering 300°C for 10 seconds
Temperature Range

1

Recommended Operating -55°C to +125°C
Maximum Operating -55°C to +135°C
Storage -65°C to +135°C

PARAMETER

STATIC CHARACTERISTICS
OUTPUT VIN = 16 to 40 VDC
Voltage I
Current 5 0.0
Ripple Full Load, 20KHz to 2MHz 40 85 40 85 mV p-p
Accuracy
Power1 30 30 W
REGULATION

4

Line

4

Load
CROSS REGULATIO N6 V
INPUT
Voltage Range
Current

Ripple Current
EFFICIENCY
ISOLATION Input to output @500 VDC 100 100
CAPACITIVE LOAD No effect on performance

Load Fault Power Dissipation Short Circuit
Switching Frequency I

SYNC Frequency Range7 500 700 500 700 KHz
DYNAMIC CHARACTERISTICS
Step Load Changes
Output4
Transient

Recovery

Step Line Changes
Output
Transient
Recovery

TURN-ON
Delay3

Load Fault Recovery VIN = 16 to 40 VDC 14 25 14 25 ms

Overshoot

2

2

-55°C ≤ TC ≤ +125°C, V

OUT

T

CASE

V

IN

I

OUT

IN

No Load, pin 2 = open
Inhibited, pin 2 tied to pin 10
Full Load
Full Load T

= +25°C (total for both outputs)

T

C

Overload, T

OUT

50% Load to
No Load to 50% Load

50% Load to 100% Load
No Load to 50% Load
50% Load to No Load

Input step 16 to 40
Input step 40 to 16 V
Input step 16 to 40 VDC
Input step 40 to 16 VDC

V

IN

I

OUT

Condition

±

5%, CL=0, unless otherwise

specified

= 0 to Full Load

= 25°C, Full Load

= 16 to 40 VDC

= 0 to Full Load

= 16, 28, and 40 VDC

= 28 VDC

IN

Min Typ Max Min Typ Max Units

±

11.76 ±12.00 ±12.24 ±14.70 ±15.00 ±15.30

±

11.88 ±12.00 ±12.12 ±14.85 ±15.00 ±15.15

16.0 28.0

= +25°C

C

= +25°C

C

= Full Load 500 600 500 600 KHz

100% Load

VDC

DC

= 16 to 40 VDC

= 0 to Full Load

80 82 79 82 %

ATR2812D/CH

75

±

75
18
50

5

0.0

16.0 28.0

±

1.25

120

25

40.0

100 100
9

±
±

500

±

-600

100
250

25

3

180

5
5

0

14

14

±

450

±

760
70

1500

5

1200

-1500
10
10

600

25

9

ATR2815D/CH

18
25

±

100

±

250
25

500

3

±

180

-600
5
5

0

14

±

75
150

±

40.0
75
18
50

14

±

450

±

750
70

1500

1500

-1500
10
10

600

25

1.0

5

%

5

mA
mA

mA p-p

MΩ

mVpk
mVpk

mVpk
mVpk

mVpk

V
ADC

V

mV
mV

V

µF

W
W

µ
µ

ms

ms
ms

ms

DC

DC

DC

DC
DC

s
s

Notes to Specifications

1. Above +125°C case temperature, derate output power linearly to 0 at +135°C case.

2. Recovery time is measured from the initiation of the input transient to where V

3. Turn-on delay time measurement is for either an application of power at the input or a signal at the inhibit pin.

4. Load current split equally between +V

5. Up to 90% of Full Power is available from either output provided. The total power output does not exceed 30 watts.

OUT

and –V

OUT

.

6. 3W load on output under test, 3W to 27W on other output.

7. Sync. Input signal: V

0.8V Max, 11.5V Max

= -0.5V Min, V

IL

= 2.5V Min, 10% to 90% duty cycle

IN

has returned to within ±1% of V

OUT

at 50% load.

OUT

www.irf.com 5

ATR28XXD Series

)

y

g

y

p

y

p

A TR28XXD Block Diagram






PKG

W

581

.=

34+Vout

Return

-Vout

5

1

+In

2

Enable

8

Case

9

S

nc

ut

In

Return

10

ut

EMI

Filter

Primar

Housekeepin

Suppl

Pulse Width

Modulator

Drive

FB

CS

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 400µA of current. The open cir­cuit voltage of the inhibit input is 11.5 ±1 VDC.

EMI Filter

An EMI filter (AFC461), available as an option, 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 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).
The Advanced Analog ATR28xx converters provide a syn­chronizing input permitting synchronization of multiple con­verters to the frequency of the users system clock, thereby
minimizing this type of noise.

Regulator

E rro r
Am p &
R e f

Thermal Management

Assuming that there is no forced air flow, the package
temperature rise above ambient (∆T) may be calculated
using the following expression:

–0.7

= 80 A

∆Τ

where A = the effective surface area in square inhes(in­cluding heat sink if used), Pd = power dissipation in watts.

The total surface area of the ATR standard package is

7.34 square inches. If a worse case full load efficiency of
78% is assumed, then the case temperature rise can be
calculated as follows:

PP

OUTd

and

Hence, if T
temperature will be approximately 147°C if no heat sink

= 80 (7.34)

∆Τ

AMBIENT

or air flow is provided.
To calculate the heat sink area required to maintain a

specific case temperature rise, equation (1) may be
manipulated as follows:

A

HEATSINK

0.85

P

(°C) (1)






–0.7

301

(8.5

1




78



0.85

−=

= 122°C

1



−=



Eff



= +25°C, the DC/DC converter case

.

431

−

80



∆

T

P

d

−

A



.

850







=






As an example, if it is desired to limit the case tempera­ture rise to a maximum of 50°C above ambient, the
required effective heat sink area is:

HEATSINK



=




50




.

850

5880

).(



=−

..

119347

.

−

431

6 www.irf.com

2

inA

A TR28XXD Case Outlines

0

g

g

ATR28XXD Series

2.880
Max

Flanged

1.110

Ø 0.162

2 Holes

2.550

2.110
Max

0.390

Max

0.050

Pin Designation

Pin No. Designation

1 Positive Input
2 Inhibit Input
3 Positive Output
4 Output Return
5 Negative Output
6 N/C
7 N/C
8 Case
9 Sync.

10 Input Return

0.040 D X

0.26 L Pins

4 X 0.400

=1.600

Non-Flanged

0.800

123 54

610987

Part Numbering

ATR 28 15 S F / CH

Model
Input Volta

28 = 28V Nominal

Output Voltage

Single - 05, 12, 15VDC
Dual - 12 = ±12V, 15 = ±15V
Triple - 12 = 5V, ±12V
15 = 5V, ±15V

e

0.390
Max

Screenin

–

, ES, HB, CH

Package Style

F = Flange
Omit for Non-flange

Outputs

S = Single
D = Dual
T = Triple

2.11

www.irf.com 7

ATR28XXD Series

Availab le Screening Levels and Process V ariations for A TR28XXD 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 B Cond C Cond C
2001 500g Cond A Cond A

MIL-PRF-

38534

1014
2009

No

Suffix

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

∗

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

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

∗
∗

ES

Suffix

Yes Yes Yes

Cond A, C Cond A, C Cond A, C

Yes Yes Yes

Availab le Standard Military Drawing (SMD) Cross Reference

Standardized

Military Drawing

Pin

5962-9462701
5962-9462801

Vendor

CAGE

Code

52467
52467

Vendor
Similar

Pin

ATR2812D
ATR2815D

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

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