IOR ATO28XXT User Manual

查询ATO2812T供应商

PD - 94582

A T O28XXT SERIES

ADVANCED ANALOG

28V Input, T riple Output

HYBRID-HIGH RELIABILITY
DC/DC CONVERTERS

Description

The ATO28XXT Series of DC/DC converters feature
high power density and an extended temperature range
for use in military and industrial applications. Designed
to the nominal input requirements of MIL-STD-704D,
these devices have nominal 28VDC inputs with +5V
and ±12V or +5V and ±15V triple 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.

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. Refer
to Part Number section. They are 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 fully
qualified to MIL-STD-1772. All processes used to manu­facture these converters have been qualified to enable
Advanced Analog to deliver compliant devices. Two
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 re­quirements but do not have class H element evalua­tion as directed by MIL-PRF-39534. Both grades are
fully tested and operate over the full military tempera­ture range without derating of output power. Variations
in electrical, mechanical and screening can be accom­modated. Extensive computer simulation using com­plex modeling enables modest design modifications to
be accommodated. Contact Advanced Analog with
specific requirements.

Features

n 16 to 40 VDC Input Range (28VDC Nominal)
n 5V, ±12V or 5V, ±15V Outputs Available
n Indefinite Short Circuit and Overload

Protection

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 81%
n Shutdown from External Signal
n 200,000 Hour MTBF at 85°C

www.irf.com 1

ATO

11/20/02

ATO28XXT Series

Specifications

T

= -55°C to +85°C, V

CASE

ABSOLUTE MAXIMUM RATINGS

Input Voltage -0.5V to 50V
Power Output Intern ally lim ite d , 1 7 .5 W typical
Soldering 30 0°C for 10 seconds
Temperature Range

6

Opera ting - 5 5°C to +115°C case

Storage -65°C to +135°C

TEST

STATIC
CHARACTERISTICS
OUTPUT
Voltage 1 V

1,2,3

Current

Ripple Voltage

Power

REGULATION
Line

Load

INPUT
Current

Ripple Current

I

1,4

1,2,3

P

1,3

1,3

EFFICIENCY EFF I

ISOLATION ISO Input to output or any pin to
Load Fault

Power Dissipation
Switching Frequency FS I

Inhibit Open Circuit
Voltage

Notes to Specifications

1. Tested at each output.

2. Parameter guaranteed by line and load regulation tests.

3. At least 20 percent of the total output power should be taken from the (+5V volt) main output.

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

5. 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.

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

SYMBOL

V

4

3

= +28V ± 5% unless otherwise specified

IN

-55°C ≤ T

I

OUT

OUT

RIP

OUT

VR

LINE

VR

LOAD

I

IN

I

RIP

P

D

VOI 9 13 9 13 V

= 0 (main)

OUT

I

= 0 (dual)1

OUT

VIN = 16, 28, and 40 V D C (main) 0.0 2000 0.0 2000 mA

VIN = 16, 28, and 40 VDC (dual)
VIN = 16, 28, and 40 VDC (dual)

BW = DC to 2 MHz (main)

V

= 16, 28, and 40 VDC

IN

BW = DC to 2 MHz (dual))

VIN = 16, 28, and 40 VDC (main)

(+dual)
(-dual)
(total)

V

= 16, 28, and 40 VDC

IN

= 0, 1000, 2000mA (main)

I

OUT

V

= 16, 28, and 40 VDC (dual)

IN

I

= 0, ±84, ±167mA (dual)

OUT

V

= 16, 28, and 40 VDC

IN

= 0, 1000, 2000mA (main)

I

OUT

V

= 16, 28, and 40 VDC

IN

= 0, ±84, ±167mA (dual)

I

OUT

I

= 0, Inhibit (pin 8)

OUT

Tied to input return (pin 10)
I

= 0, inhibit (pin 2) = open

OUT

I

= 2000 mA (main)

OUT

= ±167mA (dual)

I

OUT

BW = DC to 2MHz

= 2000mA (main)

OUT

= ±167mA (dual)

I

OUT

case (except pin 7) at 500 VDC,

Overload

Short Circuit

= 2000mA (main)

OUT

I

= ±167mA (dual)

OUT

Condition

≤ +85°C, VIN = 28 VDC ±5%, CL=0

C

unless otherwise specified Min Max Min Max Units

TC = 25°C

Over Temp

TC = 25°C

Over Temp

1

0.0

10

TC = 25°C

Over Temp

TC = 25°C

TC = 25°C
TC = 25°C

225 275 225 275 KHz

ATO2812T

4.95

4.90

11.88

±

11.76

±

2.5

2.5
15

5.05

5.10

12.12

±

12.24

±

208

±

80
40

10

25

30

±

60

±

50

60

±

15
40

50

76 76 %

100 100

8 6 8 6 W

ATO2815T

4.95

4.90

14.85

±

14.70

±

0.0

2.5

2.5
15

5.05

5.10

15.15

±

15.30

±

167

±

80
40 mVp-p

W

25

35

±

75

±

50

75

±

15
40

50

V
V
V
V

mA

mVp-p

W
W

W
mV
mV

mV
mV

mV

mA
mA

mAp-p

MΩ

W

2 www.irf.com

ATO28XXT Series

Specifications

T

= -55°C to +105°C, V

CASE

= +28V ± 5% unless otherwise specified

IN

ABSOLUTE MAXIMUM RATINGS

Input Vo ltag e -0.5V to 5 0 V
Power Output Intern a lly limited , 1 7 .5W typical
Soldering 300°C for 10 seconds
Temperature Range

6

Operating -5 5°C to +12 5°C case

Storage -65°C to +13 5°C

TEST

SYMBOL

-55°C ≤ T

≤ +105°C, VIN = 28 VDC ±5%, CL=0

C

unless otherwise specified

Condition

ATO2812T/ES

ATO2815T/ES

Min Max Min Max Units
STATIC
CHARACTERISTICS
OUTPUT
Voltage 1 V

1,2,3

Current
Ripple Voltage

I

BW = DC to 2 MHz (main)

1,2,3

Power

P

REGULATION

1,3

Line

1,3

Load

INPUT
Current

Ripple Current

EFFICIENCY EFF I

ISOLATION ISO Input to output or any pin to

Load Fault
Power Dissipation

Switching Frequency

Inhibit Open Circuit
Voltage

Notes to Specifications

I

OUT

OUT

VR

VR

V

RIP

OUT

LINE

LOAD

IIN

I

RIP

1,4

4

= 0 (main)

OUT

I

= 0 (dual)1

OUT

VIN = 16, 28, and 40 VDC (main) 0.0 2000 0.0 2000 mA

= 16, 28, and 40 VDC (dual)

V

IN

VIN = 16, 28, and 40 VDC

= 16, 28, and 40 VDC

V

IN

BW = DC to 2 MHz (dual))

VIN = 16, 28, and 40 VDC (main)

(+dual)
(-dual)
(total)

= 16, 28, and 40 VDC

V

IN

= 0, 1000, 2000mA (main)

I

OUT

V

= 16, 28, and 40 VDC (dual)

IN

= 0, ±84, ±167mA (dual)

I

OUT

= 16, 28, and 40 VDC

V

IN

I

= 0, 1000, 2000mA (main)

OUT

= 16, 28, and 40 VDC

V

IN

I

= 0, ±84, ±167mA (dual)

OUT

I

= 0, Inhibit (pin 8)

OUT

Tied to input return (pin 10)

= 0, inhibit (pin 2) = open

I

OUT

= 2000 mA (main)

I

OUT

I

= ±167mA (dual)

OUT

BW = DC to 2MHz

= 2000mA (main)

OUT

I

= ±167mA (dual)

OUT

TC = ±25°C
case (except pin 7) at 500 VDC,

TC = +25°C

3

PD

Overload, TC = +25°C

5

1

TC = 25°C

Over Temp

TC = 25°C

Over Temp

0.0

10

TC = 25°C

Over Temp

TC = 25°C

TC = 25°C

TC = 25°C

Short Circuit, TC = +25°C
I

F

S

VOI 9 13 9 13 V

= 2000mA (main)

OUT

I

= ±167mA (dual)

OUT

4.95

4.90

11.88

±

11.76

±

2.5

2.5
15

5.05

5.10

12.12

±
±

±

±

12.24

±

208
80

40

10

25

30

±

60

±

50

60

±

15
40

50

4.95

4.90

14.85

14.70

0.0

2.5

2.5
15

76 76 %

100 100

225

8
6

275

225

5.05

5.10

15.15

±

15.30

±

167

±

80

V
V
V
V

mA

mVp-p

40 mVp-p

W

25

35

±

75

±

50

75

±

15
40

50

W
W

W
mV
mV

mV
mV

mV

mA
mA

mAp-p

MΩ

8
6

275

W

W

KHz

1. Tested at each output.

2. Parameter guaranteed by line and load regulation tests.

3. At least 20 percent of the total output power should be taken from the (+5V volt) main output.

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

5. 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.

6. Above 105°C case temperature, derate output power linearly to 0 at 125°C case

www.irf.com 3