AHF2812S/HB [INFINEON]

28V Input, Single and Dual Output; 28V输入，单输出和双输出


型号：	AHF2812S/HB
厂家：	Infineon
描述：	28V Input, Single and Dual Output 28V输入，单输出和双输出
文件：	总17页 (文件大小：149K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

PD - 94541

AHF28XX SERIES

28V Input, Single and Dual Output

ADVANCED ANALOG

HYBRID-HIGH RELIABILITY

DC/DC CONVERTERS

Description

The AHF Series of DC/DC converters feature single or

dual outputs over the full military temperature range.

No derating in output power is required, making them

suitable for use in rugged military applications. The low

profile, small outline package is ideally suited to the

tight board space requirements of many industrial and

aerospace applications. Designed for nominal 28Vdc

inputs, this family of converters will meet the require-

ments of MIL-STD-704D. The basic circuit utilizes a

pulse width modulated, feed-forward topology at a nomi-

nal switching frequency of 550KHz. Input to output iso-

lation is achieved through the use of transformers in

the forward and feedback circuits.

AHF

Features

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

n Single and Dual Outputs

n 12 Watts Output Power

22.8 W/in3 Power Density

Low Input / Output Noise

(50mA/60mVp-p max. respectively)

Indefinite Short Circuit and Overload

Protection

Wideband Control Loop for

Superior Transient Characterstics

The proprietary magnetic feedback circuit provides for

an extremely wide bandwidth control loop with a high

phase margin. The closed loop frequency response of

this converter family extends to approximately 50KHz,

resulting in superior line and load transient character-

istics. This feedback method is also inherently tem-

perature and radiation insensitive. This gives the AHF

Series an important advantage over converters that

incorporate opto-couplers in their design.

n No Derating for -55°C to +125°C Opertation

Constant Switching Frequency

(550KHz Nominal)

These converters are manufactured in a facility certi-

fied to MIL-PRF-38534. All processes used to manu-

facture these converters have been qualified to enable

Advanced Analog to deliver compliant devices. Four

screening grades are available to satisfy a wide range

of requirements.The CH grade converters are fully com-

pliant to MIL-PRF-38534 class H. The HB grade con-

verters are processed to full MIL-PRF-38534 screen-

ing but do not have class H element evaluation as re-

quired by MIL-PRF-38534. Two grades are fully tested

and operate the full military temperature range without

derating of output power. Industrial and commercial

grades are also available. Variations are electrical,

mechanical and screening can be accommodated.

Extensive computer simulation using complex

modeling enables rapid design modification to

be provided. Contact Advanced Analog with spe-

cific requirements.

www.irf.com

10/08/02

AHF28XX Series

Specifications

AHF2805S

ABSOLUTE MAXIMUM RATINGS

Input Voltage

-0.5V to 50V

Soldering Temperature

Case Temperature

300°C for 10 seconds

Operating -55°C to +125°C

Storage -65°C to +135°C

Table I. Electrical Performance Characteristics

Conditions

Limits

Test

Symbol

V_OUT

Group A

Subgroups

Device

Types

Unit

-55°C Tc +125°C

Vin = 28 Vdc ±5%, C_L= 0

Unless otherwise specified

≤

Min

Max

Output voltage

Output current¹

I_OUT= 0

2,3

4.95

4.90

5.05

5.10

I_OUT

V_IN= 16, 28, and 40 V dc

1,2,3

2400

Output ripple

voltage²

V_RIP

V_IN= 16, 28, and 40 V dc,

B.W. = 20 Hz to 2MHz

mV p-p

Line regulation

Load regulation

Input current

VR_LINE

VR_LOAD

I_IN

V_IN= 16, 28, and 40 V dc,

Iout = 0, 500, and 1000 mA

1,2,3

V_IN= 16, 28, and 40 V dc,

I_OUT= 0, 500, and 1000 mA

I_OUT= 0, inhibit (pin 1)

tied to input return (pin 7)

I_OUT= 0,

inhibit (pin 1) = open

Input ripple current²

Efficiency

I_RIP

I_OUT= 1000mA

B.W. = 20 Hz to 2MHz

1,2,3

mA p-p

E_FF

I_OUT= 1000mA

2,3

Isolation

ISO

Input to output or any pin

To case (except pin 6) at

500V dc Tc = +25°C

100

Ω

Capacitive load^3,4

C_L

No effect on dc

500

µF

performance, Tc = +25°C

Power dissipation

load fault

P_D

F_S

Overload ⁵

Short circuit

1,2,3

Switching

frequency

I_OUT= 1000mA

4,5,6

500

600

kHz

For Notes to Specifications, refer to page 3

www.irf.com

AHF28XX Series

AHF2805S

Table I. Electrical Performance Characteristics - continued

Conditions

Limits

Unit

Test

Symbol

VO_TLOAD

Group A

Subgroups

Device

Types

-55°C Tc +125°C

≤

Vin = 28 Vdc ±5%, C_L= 0

unless otherwise specified

Min

Max

Output response to

step transient load

changes⁶

1200 mA to/from 2400mA

0 mA to/from 1200mA

4,5,6

-300

-500

+300

+500

mV pk

Recovery time step

transient load

changes^6.7

TT_LOAD

1200 mA to/from 2400mA

4,5,6

µs

0 mA to 1200 mA

500 mA to 0 mA

4,5,6

1200

Output response to

transient step line

changes

VO_TLINE

Input step 16 V to/from

4,5,6

500

800

mV pk

µs

40 V dc, I_OUT= 2400mA ^4,

Recovery time

transient step line

changes

TT_LINE

Input step 16 V to/from 40Vdc

_OUT= 2400mA ^{4, 7, 8}

Turn on overshoot

Turn on delay

VTon_OS

Ton_D

I_OUT= 0 and 2400mA

I_OUT= 0 and 2400mA ⁹

4,5,6

600

mV pk

Load fault

recovery^4,9

Tr_LF

4,5,6

Weight

grams

Notes to Specifications

1. Parameter guaranteed by line and load regulation tests.

2. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz.

3. Capacitive load may be any value from 0 to the maximum limit without compromising dc performance.

A capacitive 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.

4. 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.

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. Load step transition time between 2 and 10 microseconds.

7. Recovery time is measured from the initiation of the transient to where V_OUThas returned to within ±1

percent of V_OUTat 50 percent load.

8. Input step transition time between 2 and 10 microseconds.

9. Turn-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 1) while power is applied to the input is unlimited.

www.irf.com

AHF28XX Series

Specifications

AHF2812S

ABSOLUTE MAXIMUM RATINGS

Input Voltage

-0.5V to 50V

Soldering Temperature

Case Temperature

300°C for 10 seconds

Operating -55°C to +125°C

Storage -65°C to +135°C

Table II. Electrical Performance Characteristics

Conditions

Test

Symbol

V_OUT

Group A

Subgroups

Device

Types

Limits

Min Max

Unit

-55°C Tc +125°C

Vin = 28 Vdc ±5%, C_L= 0

Unless otherwise specified

≤

Output voltage

Output current¹

I_OUT= 0

2,3

11.88

11.76

12.12

12.24

I_OUT

V_IN= 16, 28, and 40 V dc

1,2,3

1000

Output ripple

voltage²

V_RIP

V_IN= 16, 28, and 40 V dc,

B.W. = 20 Hz to 2MHz

mV p-p

Line regulation

Load regulation

Input current

VR_LINE

VR_LOAD

I_IN

V_IN= 16, 28, and 40 V dc,

Iout = 0, 500, and 1000 mA

1,2,3

V_IN= 16, 28, and 40 V dc,

I_OUT= 0, 500, and 1000 mA

_OUT= 0, inhibit (pin 1)

tied to input return (pin 7)

I_OUT= 0,

inhibit (pin 1) = open

Input ripple current²

I_RIP

I_OUT= 1000mA

B.W. = 20 Hz to 2MHz

1,2,3

mA p-p

Efficiency

Isolation

E_FF

_OUT= 1000mA

2,3

ISO

Input to output or any pin

to case (except pin 6) at

500V dc Tc = +25°C

100

Ω

Capacitive load^3,4

C_L

P_D

No effect on dc

performance, Tc = +25°C

500

µF

Power dissipation

load fault

Overload ⁵

Short circuit

1,2,3

Switching

frequency

F_S

I_OUT= 1000mA

4,5,6

500

600

kHz

For Notes to Specifications, refer to page 5

www.irf.com

AHF28XX Series

AHF2812S

Table II. Electrical Performance Characteristics - continued

Test

Symbol

VO_TLOAD

TT_LOAD

Conditions

-55°C Tc +125°C

Vin = 28 Vdc ±5%, C_L= 0

Group A

Subgroups

Device

Types

Limits

Unit

≤

Min

Max

unless otherwise specified

Output response

to step transient

load changes⁶

50 mA to/from 1000mA

0 mA to/from 500mA

5,6

-300

-450

-500

-750

+300

+450

+500

+750

mV pk

µs

5,6

Recovery time

step transient

load changes^6,7

50 mA to/from 1000mA

0 mA to 500 mA

4,5,6

100

1500

500 mA to 0 mA

4,5,6

Output response

to transient step

line changes

VO_TLINE

Input step 16 V to/from

40 V dc, I_OUT=1000mA ^{4, 8}

1500

mV pk

Recovery time

transient step

line changes

TT_LINE

Input step 16 V to/from 40Vdc

4,5,6

800

µs

_OUT=1000mA ^{4, 7, 8}

Turn on

overshoot

VTon_OS

Ton_D

Tr_LF

I_OUT= 0 and 1000mA

I_OUT= 0 and 1000mA ⁹

4,5,6

600

mV pk

Turn on delay

Load fault

recovery^4,9

Weight

grams

Notes to Specifications

1. Parameter guaranteed by line and load regulation tests.

2. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz.

3. Capacitive load may be any value from 0 to the maximum limit without compromising dc performance.

A capacitive 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.

4. 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.

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. Load step transition time between 2 and 10 microseconds.

7. Recovery time is measured from the initiation of the transient to where V_OUThas returned to within ±1

percent of V_OUTat 50 percent load.

8. Input step transition time between 2 and 10 microseconds.

9. 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 1) while power is applied to the input is unlimited.

www.irf.com

AHF28XX Series

Specifications

AHF2815S

ABSOLUTE MAXIMUM RATINGS

Input Voltage

-0.5V to 50V

Soldering Temperature

Case Temperature

300°C for 10 seconds

Operating -55°C to +125°C

Storage -65°C to +135°C

Table III. Electrical Performance Characteristics

Test

Symbol

Conditions

-55°C Tc +125°C

Vin = 28 Vdc ±5%, C_L= 0

unless otherwise specified

Group A

Subgroups

Device

Types

Limits

Min Max

Unit

≤

Output voltage

Output current¹

V_OUT

I_OUT= 0

2,3

All

14.85 15.15

14.70 15.30

I_OUT

V_IN= 18, 28, and 40 V dc

1,2,3

All

2000

Output ripple

voltage²

V_RIP

V_IN= 18, 28, and 40 V dc,

B.W. = 20 Hz to 2 MHz

mV p-p

Line regulation

VR_LINE

V_IN= 18, 28, and 40 V dc,

Iout = 0, 1000, and 2000 mA

2,3

All

±35

±75

Load regulation

Input current

VR_LOAD

V_IN= 18, 28, and 40 V dc,

I_OUT= 0, 1000, and 2000 mA

1,2,3

±150

I_IN

I_OUT= 0, inhibit (pin 2)

tied to input return (pin 10)

I_OUT= 0,

All

inhibit (pin 2) = open

Input ripple current²

Efficiency

I_RIP

_OUT= 2000mA,

All

mA p-p

B.W. = 20 Hz to 2 MHz

E_FF

_OUT= 2000mA

2,3

Isolation

ISO

Input to output or any pin

to case (except pin 7) at

500 V dc Tc = +25°C

100

Ω

Capacitive load^3,4

C_L

P_D

No effect on dc performance,

Tc = +25°C

All

200

µF

Power dissipation

load fault

Overload ⁵

All

Short circuit

1,2,3

Switching frequency

F_S

I_OUT= 2000mA

4,5,6

01, 04

02, 05

03, 06

250

275

300

270

300

kHz

For Notes to Specifications, refer to page 7

www.irf.com

AHF28XX Series

AHF2815S

Table III. Electrical Performance Characteristics - continued

Test

Symbol

Conditions

-55°C Tc +125°C

Vin = 28 Vdc ±5%, C_L= 0

unless otherwise specified

Group A

Subgroups

Device

Types

Limits

Max

Unit

≤

Min

Output response to

step transient load

Changes⁶

VO_TLOAD

TT_LOAD

1000 mA to/from 2000mA

0 mA to/from 1000mA

4,5,6

All

-800

+800

+750

100

200

mV pk

-1000

Recovery time step

transient load

Changes^6,7

1000 mA to/from 2000mA

0 mA to/from 1000 mA

µs

5,6

Output response to

transient step line

changes

VO_TLINE

Input step 18 V to/from

4,5,6

-1000

+1000

500

mV pk

4, 8

40 V dc, I_OUT= 2000mA

Recovery time

transient step line

changes

TT_LINE

Input step 18 V to/from 40Vdc

µs

All

4, 7, 8

I_OUT= 2000mA

Turn on overshoot

Turn on delay

VTon_OS

Ton_D

I_OUT= 0 and 2000mA

I_OUT= 0 and 2000mA ⁹

4,5,6

750

mV pk

Load fault

recovery^4,9

Tr_LF

4,5,6

All

Weight

grams

Notes to Specifications

1. Parameter guaranteed by line and load regulation tests.

2. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz.

3. Capacitive load may be any value from 0 to the maximum limit without compromising dc performance.

A capacitive 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.

4. 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 III.

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. Load step transition time between 2 and 10 microseconds.

7. Recovery time is measured from the initiation of the transient to where V_OUThas returned to within ±1

percent of V_OUTat 50 percent load.

8. Input step transition time between 2 and 10 microseconds.

9. 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 is unlimited.

www.irf.com

AHF28XX Series

Specifications

AHF2805D

ABSOLUTE MAXIMUM RATINGS

Input Voltage

-0.5V to 50V

Soldering Temperature

Case Temperature

300°C for 10 seconds

Operating -55°C to +125°C

Storage -65°C to +135°C

Table IV. Electrical Performance Characteristics

Test

Symbol

Conditions

-55°C Tc +125°C

Vin = 28 Vdc ±5%, C_L= 0

unless otherwise specified

I_OUT= 0

Group A

Subgroups

Device

Types

Limits

Min Max

Unit

≤

Output voltage

Output current^1,2

V_OUT

±4.95

±4.90

±5.05

±5.10

2,3

V_IN= 16, 28, and 40 V dc,

each output

I_OUT

1,2,3

0.12

1.08

mV p-p

Output ripple

voltage³

V_IN= 16, 28, and 40 V dc,

B.W. = 20 Hz to 2 MHz

V_IN= 16, 28, and 40 V dc,

Iout = 0, 1200, and 2400 mA

V_IN= 16, 28, and 40 V dc,

V_RIP

Line regulation⁴

Load regulation⁴

Cross regulation⁵

Input current

VR_LINE

VR_LOAD

VR_cros

I_IN

_OUT= 0, 1200, and 2400 mA

10 percent to 90 percent

load change

I_OUT= 0, inhibit (pin 1)

tied to input return (pin 7)

I_OUT=0, inhibit (pin 1) = open

I_OUT= 2400mA

Input ripple

current^3,4

Efficiency⁴

I_RIP

B.W. = 20 Hz to 2 MHz

I_OUT= 2400mA,

1,2,3

1,3

mA p-p

E_FF

T_C=+25°C

Input to output or any pin

to case (except pin 6) at

500V dc, T_C= +25°C

No effect on dc

Isolation

ISO

C_L

100

Ω

Capacitive load^6,7

performance, T_C= +25°C,

total for both outputs

200

µF

For Notes to Specifications, refer to page 9

www.irf.com

AHF28XX Series

AHF2805D

Table IV. Electrical Performance Characteristics - continued

Test

Symbol

Conditions

-55°C Tc +125°C

Group A

Subgroups

Device

Types

Limits

Unit

≤

Vin = 28 Vdc ±5%, C_L= 0

unless otherwise specified

Overload, T_C= +25°C ⁸

Min

Max

Power dissipa-

tion load fault

P_D

1,2,3

Short circuit, T_C= +25°C

Switching

frequency⁴

Output response

to step transient

load changes^4,9

F_S

I_OUT= 2400mA

1200 mA to/from 2400mA

4,5,6

500

600

kHz

VO_TLOAD

-400

-800

+400

+800

mV pk

0 mA to/from 1200 mA

4,5,6

Recovery time

step transient load

changes^4,9,10

1200 mA to/from 2400mA

TT_LOAD

µs

0 mA to/from 1200 mA

4,5,6

100

Output response

transient step line

changes^4,7,11

Input step from/to 16 to

40 V dc, I_OUT=2400mA

VO_TLINE

-400

+400

mV pk

µs

Recovery time

transient step line

changes^4,7,10,11

TT_LINE

Input step from/to 16 to 40 V

dc, I_OUT=2400mA

4,5,6

1200

Turn on

_OUT=0 and 2400mA

4,5,6

600

mV pk

overshoot⁴

Turn on delay^4,12

VTon_OS

Ton_D

I_OUT= 0 and 2400mA

Load fault

recovery⁷

Tr_LF

4,5,6

Weight

grams

Notes to Specifications

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

2. Up to 90 percent of full power is available from either output provided the total output does not exceed 12W.

3. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz.

4. Load current split equally between +V_OUTand –V_OUT

5. 1.2 watt load on output under test, 1.2 watt to 10.8 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 IV.

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_OUThas returned to within ±1

percent of V_OUTat 50 percent load.

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

12. 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 1) while power is applied to the input.

www.irf.com

AHF28XX Series

Specifications

AHF2812D

ABSOLUTE MAXIMUM RATINGS

Input Voltage

-0.5V to 50V

Soldering Temperature

Case Temperature

300°C for 10 seconds

Operating -55°C to +125°C

Storage -65°C to +135°C

Table V. Electrical Performance Characteristics

Test

Symbol

Conditions

-55°C Tc +125°C

Vin = 28 Vdc ±5%, C_L= 0

unless otherwise specified

I_OUT= 0

Group A

Subgroups

Device

Types

Limits

Min Max

Unit

≤

Output voltage

Output current^1,2

V_OUT

±11.88 ±12.12

±11.76 ±12.24

2,3

V_IN= 16, 28, and 40 V dc,

each output

I_OUT

1,2,3

100

900

mV p-p

Output ripple

voltage³

V_IN= 16, 28, and 40 V dc,

B.W. = 20 Hz to 2 MHz

V_IN= 16, 28, and 40 V dc,

Iout = 0, 500, and 1000 mA

V_IN= 16, 28, and 40 V dc,

V_RIP

Line regulation⁴

Load regulation⁴

Cross regulation⁵

Input current

VR_LINE

VR_LOAD

VR_cros

I_IN

_OUT= 0, 500, and 1000 mA

10 percent to 90 percent

load change

3.0

I_OUT= 0, inhibit (pin 1)

tied to input return (pin 7)

I_OUT=0, inhibit (pin 1) = open

I_OUT= 1000mA

Input ripple

current^3,4

Efficiency⁴

I_RIP

B.W. = 20 Hz to 2 MHz

I_OUT= 1000mA,

1,2,3

1,3

mA p-p

E_FF

T_C=+25°C

Input to output or any pin

to case (except pin 6) at

500V dc, T_C= +25°C

No effect on dc

Isolation

ISO

C_L

100

Ω

Capacitive load^6,7

performance, T_C= +25°C,

total for both outputs

200

µF

For Notes to Specifications, refer to page 11

www.irf.com

AHF28XX Series

AHF2812D

Table V. Electrical Performance Characteristics - continued

Test

Symbol

Conditions

-55°C Tc +125°C

Group A

Subgroups

Device

Types

Limits

Unit

≤

Vin = 28 Vdc ±5%, C_L= 0

unless otherwise specified

Overload, T_C= +25°C ⁸

Min

Max

Power dissipa-

tion load fault

P_D

1,2,3

Short circuit, T_C= +25°C

Switching

frequency⁴

Output response

to step transient

load changes^4,9

F_S

I_OUT= 1000mA

500 mA to/from 1000mA

4,5,6

500

600

kHz

VO_TLOAD

-200

-800

+200

+800

mV pk

0 mA to/from 500 mA

4,5,6

Recovery time

step transient load

changes^4,9,10

500 mA to/from 1000mA

TT_LOAD

VO_TLINE

TT_LINE

µs

mV pk

µs

0 mA to/from 500 mA

4,5,6

1000

+750

Output response

transient step line

changes^4,7,11

Input step from/to 16 to

40 V dc, I_OUT=1000mA

-750

Recovery time

transient step line

changes^4,7,10,11

Input step from/to 16 to 40 V

dc, I_OUT=1000mA

4,5,6

1200

Turn on

_OUT=0 and 1000mA

4,5,6

600

mV pk

overshoot⁴

Turn on delay^4,12

VTon_OS

Ton_D

I_OUT= 0 and 1000mA

Load fault

recovery⁷

Tr_LF

4,5,6

Weight

grams

Notes to Specifications

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

2. Up to 90 percent of full power is available from either output provided the total output does not exceed 12W.

3. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz.

4. Load current split equally between +V_OUTand –V_OUT

5. 1.2 watt load on output under test, 1.2 watt to 10.8 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 oad 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 V.

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_OUThas returned to within ±1

percent of V_OUTat 50 percent load.

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

12. 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 1) while power is applied to the input.

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AHF28XX Series

Specifications

AHF2815D

ABSOLUTE MAXIMUM RATINGS

Input Voltage

-0.5V to 50V

Soldering Temperature

Case Temperature

300°C for 10 seconds

Operating -55°C to +125°C

Storage -65°C to +135°C

Table VI. Electrical Performance Characteristics

Conditions

Test

Symbol

Group A

Subgroups

Device

Types

Limits

Max

Unit

-55°C Tc +125°C

Vin = 28 Vdc ±5%, C_L= 0

Unless otherwise specified

≤

Min

Output voltage

Output current^1,2

V_OUT

_OUT= 0

2,3

±14.85 ±15.15

±14.70 ±15.30

I_OUT

V_IN= 16, 28, and 40 V dc,

each output

1,2,3

720

Output ripple

voltage³

V_RIP

V_IN= 16, 28, and 40 V dc,

B.W. = 20 Hz to 2 MHz

mV p-p

Line regulation⁴

Load regulation⁴

Cross regulation⁵

Input current

VR_LINE

VR_LOAD

VR_cros

I_IN

V_IN= 16, 28, and 40 V dc,

Iout = 0, 400, and 800 mA

V_IN= 16, 28, and 40 V dc,

I_OUT= 0, 400, and 800 mA

10 percent to 90 percent

load change each output

3.0

I_OUT= 0, inhibit (pin 1)

tied to input return (pin 7)

I_OUT= 0,

inhibit (pin 1) = open

Input ripple

current^3,4

I_RIP

E_FF

ISO

C_L

_OUT= 800mA

1,2,3

mA p-p

B.W. = 20 Hz to 2 MHz

Efficiency⁴

I_OUT= 800mA

1,3

Input to output or any pin

to case (except pin 6) at 500

V dc, T_C= +25°C

No effect on dc

performance,

Isolation

100

Ω

Capacitive load^6,7

200

µF

T_C= +25°C, total for both

outputs

For Notes to Specifications, refer to page 13

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AHF28XX Series

AHF2815D

Table VI. Electrical Performance Characteristics - continued

Conditions

Test

Symbol

P_D

Group A

Subgroups

Device

Types

Limits

Unit

-55°C Tc +125°C

Vin = 28 Vdc ±5%, C_L= 0

Unless otherwise specified

≤

Min

Max

Power dissipation

load fault

Overload ⁸

Short circuit

1,2,3

Switching

frequency⁴

F_S

I_OUT= 800 mA

4,5,6

500

600

kHz

Output response

to step transient

load changes^4,9

VO_TLOAD

400 mA to/from 800 mA

0 mA to/from 400 mA

4,5,6

-200

-800

+200

+800

mV pk

Recovery time

step transient load

changes^4,9,10

TT_LOAD

400 mA to/from 800 mA

0 mA to/from 400 mA

4,5,6

µs

500

Output response

transient step line

changes^4,7,11

Input step from/to 16 to

40 V dc, I_OUT=800mA

VO_TLINE

4,5,6

-750

+750

1200

mV pk

µs

Recovery time

transient step line

changes^4,7,10,11

Turn on

TT_LINE

Input step from/to 16 to

40Vdc, I_OUT=800mA

overshoot⁴

VTon_OS

Ton_D

Tr_LF

I_OUT=0 and 800mA

I_OUT= 0 and 800mA

4,5,6

750

mV pk

Turn on delay^4,12

Load fault

recovery⁷

Weight

grams

Notes to Specifications

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

2. Up to 90 percent of full power is available from either output provided the total output does not exceed 12W.

3. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz.

4. Load current split equally between +V_OUTand –V_OUT

5. 1.2 watt load on output under test, 1.2 watt to 10.8 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 VI.

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_OUThas returned to within ±1

percent of V_OUTat 50 percent load.

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

12. 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 1) while power is applied to the input.

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AHF28XX Series

AHF28XX ( Single Output ) Block Diagram

EM I

Filter

+Input

+Vout

Under-Voltage

Detector

Return

Primary

Housekeeping

Supply

Enable

Drive

Case

Pulse W idth

Error

Am p &

Ref

M odulator

Input

Return

AHF28XX ( Dual Output ) Block Diagram

EMI

Filter

+Input

+Vout

Return

-Vout

Under-Voltage

Detector

Primary

Housekeeping

Supply

Enable

Drive

Case

Pulse W idth

Error

Amp &

Ref

Modulator

Input

Return

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AHF28XX Series

Application Information

Inhibit Function

Connecting the enable input (Pin 1) to input common (Pin 7)

will cause the converter to shut down. It is recommended

that the enable pin be driven by an open collector device

capable of sinking at least 400 µA of current. The open

circuit voltage of the enable input is 15 ±1 VDC. If the inhibit

function is not used, this input can be left unconnected

because it is internally pulled-up.

Hence, if T_AMBIENT= +25°C, the DC/DC converter case

temperature will be approximately 100°C if no heat sink

or air flow is provided.

To calculate the heat sink area required to maintain a

specific case temperature rise, the above equation may

be manipulated as follows:

Thermal Management

−1.43

∆Τ

Assuming that there is no forced air flow, the package tem-

perature rise above ambient (∆T) may be calculated using

the following expression:

− Α_PKG

HEAT SINK

Ρ ^0.85

As an example, if a maximum case temperature rise of

50°C rise above ambient is desired, then the required

effective heat sink area is:

∆T ≈ 80 A ^–0.7p ^0.85(°C)

where A = the effective surface area in square inches (in-

cluding heat sink if used), P = power dissipation in watts.

−1.43

− 4.9 = 3.75in.²

The total surface area of the AHF package is 4.9 square

inches. If a worse case full load efficiency of 78% is as-

sumed, then the case temperature rise can be calculated

as follows:

Α_HEATSINK

80(3.4)^0.85

P = P

−1 =12

−1 = 3.4W

OUT

Eff

0.78

∆T = 80 (4.9)^-0.7(3.4)^0.85= 74°C

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AHF28XX Series

AHF28XX Case Outlines

Non-Flanged

0.205

(5.21)

0.030 dia.,

(0.760)

8 pins

0.505

(12.83)

0.705

(17.91)

0.905

(22.99)

1.105

(28.07)

1.450

(36.83)

0.800

(20.32)

0.090

(2.290)

R Typ

0.260

(6.600)

1.120

(28.45)

0.330

(8.380)

M AX

Flanged

Pin Designation

Part Numbering

AHF 28 05 S F / CH

AHF28XXS

AHF28XXD

Designation

M odel

Input Voltage

Screening

No.

Designation

No.

^–, ES, H B, CH

Package Options

= Flange

O m it for Standard

= 28V

Enable

+ Output

Output Return

- Output

N/C

Output Voltage

Outputs

N/C

Output Return

+ Output

N/C

±5, 12

= ±15

= ±12,

Single

Dual

Case

Input Return

+ Input

Input Return

+ Input

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AHF28XX Series

Available Screening Levels and ProcessVariations for AHF28XX Series

Requirement

MIL-STD-883

Method

Suffix

Temperature

Range

-20 to +85°C

-55°C to +125°C

Element

MIL-PRF-38534

Evaluation

Internal Visual 2017

Yes

Temperature

Cycle

Constant

Acceleration

Burn-in

1010

2001

1015

Cond B

Cond C

500g

Cond A

48hrs @ 85°C

25°C

48hrs @ 125°C

25°C

160hrs @ 125°C

-55, +25, +125°C

160hrs @ 125°C

-55, +25, +125°C

Final Electrical MIL-PRF-

(Group A)

38534

1014

2009

Seal, Fine &

Gross

External

Visual

Cond A, C

Yes

Cond A, C

Yes

Cond A, C

Yes

* Per Commercial Standards

Available Standard Military Drawing (SMD) Cross Reference

Standardized

Military Drawing

Vendor

CAGE

Code

Vendor

Similar

5962-9160001

5962-9456801

5962-9456301

5962-9211101

5962-9235101

52467

AHF2805S/CH

AHF2812S/CH

AHF2815S/CH

AHF2812D/CH

AHF2815D/CH

WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 322 3331

ADVANCED ANALOG: 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. 10/02

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AHF2812S/HB [INFINEON]

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