IOR PD - 94583 User Manual

PD - 94583

AHV28XX SERIES

28V Input, Single, Dual and Triple Output

ADVANCED ANALOG
HYBRID-HIGH RELIABILITY
DC/DC CONVERTERS

Description

The AHV Series of DC/DC converters are designed to
replace the AHE/ATO family of converters in applica­tions requiring compliance to MIL-STD-704A through
E, in particular the input surge requirement of 80 volts
specified to withstand transient input voltage of 80 volts.
No input voltage or output power derating is necessary
over the full military temperature range.

These converters are packaged in an extremely rug­ged, low profile package that meets all requirements of
MIL-STD-883 and MIL-PRF-38534. Parallel seam weld
sealing and the use of ceramic pin feedthru seals as­sure long term hermeticity after exposure to extended
temperature cycling.

The basic circuit is a push-pull forward topology using
power MOSFET switches. The nominal switching fre­quency is 500KHz. A unique current injection circuit
assures current balancing in the power switches. All
AHV series converters use a single stage LC input filter
to attenuate input ripple current. A low power 11.5volt
series regulator provides power to an epitaxial CMOS
custom pulse width modulator integrated circuit. This
single integrated circuit provides all PWM primary cir­cuit functions. P o wer is transf erred from primary to sec­ondary through a ferrite core power transformer. An
error voltage signal is generated by comparing a highly
stable reference voltage with the converter output volt­age and drives the PWM through a unique wideband
magnetic feedback circuit. This proprietary feedback
circuit provides an extremely wide bandwidth, high gain
control loop, with high phase margin. The feedback
control loop gain is insensitive to temperature, radia­tion, aging, and variations in manufacturing. The trans­fer function of the feedback circuit is a function of the
feedback transformer turns ratio which cannot change
when subjected to environmental extremes.

Manufactured in a facility fully qualified to MIL-PRF­38534, these converters are available in four screen­ing grades to satisfy a wide range of requirements.

Features

n 80 Transient Input (100 msec max.)
n 50 VDC Input (Continous)
n 16 to 40 VDC Input Range
n Single, Dual and Triple Outputs
n 15 Watts Output Power

(No Temperature Derating)

n Low Input / Output Noise
n Full Military Temperature Range
n Wideband PWM Control Loop
n Magnetic Feedback
n Low Profile Hermetic Package (0.405”)
n Short Circuit and Overload Protection
n Constant Switching Frequency (500KHz)
n Tr ue Hermetic Package (Parallel Seam

Welded, Ceramic Pin Feedthru)

The CH grade is fully compliant to the require­ments of MIL-PRF-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 (P.I.)
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 more limited screen­ing are also available for use in less demanding
applications. Var iations in electrical, mechanical
and screening can be accommodated. Contact
Advanced Analog for special requirements.

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AHV

11/20/02

AHV28XX Series

Specifications (Single Output Models)

T

= -55°C to +125°C, V

CASE

ABSOLUTE MAXIMUM RATINGS

Input Voltage -0.5V to 50VDC (continuous) 80V (100ms)
Power Output Internally limited, 17.5W typical
Soldering 300°C for 10 seconds (1 pin at a time)
Temperature Range Operating -55°C to +135°C
Storage -65°C to +135°C

TEST

STATIC
CHARACTERISTICS
OUTPUT V
Voltage I
Current I
Ripple Voltage1 V
BW = DC to 1 MHz
Power P
REGULATION
Line

Load
INPUT

Current
Ripple Current

EFFICIENCY EFF I
ISOLATION ISO Inp ut to output or any pin to

Capacitive Load
Load Fault

Power Dissipation

2,3

C

Switching Frequency
DYNAMIC

CHARACTERISTICS
Step Load Changes
Output Transient5

5,6

Recovery

Step Line Changes
Output Transient

Recovery

TURN-ON
Overshoot
Delay
Load Fault Recovery TRLF VIN = 16 to 40 VDC 4,5,6 10 10 10 ms

Notes to Specifications (Single Output Models)

1. Bandwidth guaranteed by design. T ested f or 20 KHz to 2 MHz.

2. Capacitive load may be any value from 0 to the maximum limit without affecting 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.

3. Parameter shall be tested as part of design characterization and after design or process changes. Thereafter shall be guaranteed to the limits specified.

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

5. Load step transition time between 2 to 10 microseconds.

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

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

8. T urn on dela y time measurement is for either a step application of pow er at input or the removal of a ground signal from the inhinbit pin (pin 2) while power is
applied to the input. Above 125°C case temperature, derate output power linearly to 0 at 135°C case.

SYMBOL

OUT

OUT

RIP

OUT

VRLINE

VRLOAD

I

IN

I

RIP

No effect on DC performance

L

P

D

F

I

S

VOT

LOAD

TT

LOAD

VOT

LINE

TT

LINE

VTon

T on D

= +28V ± 5% unless otherwise specified

IN

Condition

-55°C ≤ TC ≤ +125°C,
= 28 VDC ±5%, CL=0,

V

IN

unless otherwise specified

VIN = 16, 28, and 40 VDC 1 4.95 5.05 11.88 12.12 14.85 15.15 V

= 0 2,3 4.90 5.10 11.76 12.24 14.70 15.30 V

OUT

VIN = 16, 28, and 40 VDC 1,2,3 0.0 3.00 0.0 1.25 0.0 1.00 A
VIN = 16, 28, and 40 VDC 1,2,3 60 60 60 mVp-p

VIN = 16, 28, and 40 VDC 1,2,3 15 15 15 W

= 16, 28, and 40 VDC

V

IN

I

= 0, half load and full load

OUT

VIN = 16, 28, and 40 VDC
I

= 0, half load and full load

OUT

I

= 0, Inhibit (pin 2) = 0

OUT

= 0, Inhibit (pin 2) = Open

I

OUT

I

= Full load

OUT

= Full Load

OUT

T

= +25°C

C

case (except pin 8) at 500
VDC
TC = +25°C

TC = +25°C
Overload, TC = +25°C4

Short Circuit, TC = +25°C

= Full Load

OUT

50% Load
No Load
50% Load
No Load
50% 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

I

os

OUT

I

OUT

100% Load

135

50%

135

100%

135

50% Load

335

No lLoad

335

= OA and Full Load
= O and Full Load 8

Group A

Subgroups

1,2,3,

3,7
3,7
3,6,7
3,6,7

OUT

1

2,3

1,2,3

1,2,3

AHV2805S

Min Max Min Max Min Max Units

1 72 72 72 %
1 100 100 100

4 500 200 200

1

4

4
4
4
4
4

4
4
4
4

4,5,6
4,5,6

450 550 450 550 450 550 KHz

-300

-500

has returned to within ±1 percent of V

5
25
50

18
50
50

8.5

8.5

+300
+500

70

200

5

300

-1000
800
800

550

10

AHV2812S

30
60

120

18
50
50

8,5

8.5

-300

+300

-750

+750

70

1500

5

500

-1500
800
800

750

10

at 50 percent load.

OUT

AHV2815S

35
75

150

18
50
50

8.5

8.5

-300

+300

-750

+750

70

1500

5

500

-1500
800
800

750

10

mV
mV
mV

mA
mA

mAp-p

MΩ

µ

W
W

mVpk
mVpk

µ
µ

ms

mVpk
mVpk

µ
µ

mVpk

ms

F

s
s

s
s

2 www.irf.com

AHV28XX Series

Specifications (Dual Output Models)

T

= -55°C to +125°C, V

CASE

= +28V ± 5% unless otherwise specified

IN

ABSOLUTE MAXIMUM RATINGS

Input Voltage -0.5V to 50VDC (continuous) 80V (100ms)
Power Output Internally limited, 17.5W typical
Soldering 300°C for 10 seconds (1 pin at a time)
Temperature Range Operating -55°C to +135°C
Storage -65°C to +135°C

TEST

STATIC
CHARACTERISTICS
OUTPUT
Voltage 1 V

1,2

Current
Ripple Voltage
BW = DC to 2 MHz
Power
REGULATION
Line

Load
INPUT

Current

Ripple Current

I

1,3

V

1,2,4

P

1,5

1

3

EFFICIENCY EFF I

ISOLATION ISO Input to output or any pin to

Capacitive Load

Load Fault
Power Dissipation

6,7

C

Switching Frequency
DYNAMIC

CHARACTERISTICS
Step Load Changes
Output Transient 9

9,10

Recovery

Step Line Changes
Output Transient

Recovery

TURN-ON

Overshoot
Delay
Load Fault Recovery 7 TRLF 4,5,6 10 10 ms

7,11

7,10, 11

1

1,12

SYMBOL

I

OUT

VIN = 16, 28, and 40 VDC 1,2,3 0.0

OUT

VIN = 16, 28, and 40 VDC 1,2,3 60 60 mVp-p

RIP

VIN = 16, 28, and 40 VDC 1,2,3 15 15 W

OUT

VR

LINE

I

OUT

VR

LOAD

I

IN

I

RIP

No effect on DC performance

L

P

D

I

F

S

VOT

LOAD

TT

LOAD

VOT

LINE

TT

LINE

VTon

OS

T on D

-55°C ≤ T

V

IN

unless otherwise specified

= 0 1

OUT

= 16, 28, and 40 VDC

V

IN

= 0, half load and full load

I

OUT

VIN = 16, 28, and 40 VDC

= 0, half load and full load

I

OUT

I

= 0, Inhibit (pin 2)

OUT

Tied to input return (pin 10)

= 0, Inhibit (pin 2) = Open

I

OUT

= Full load

I

OUT

BW = DC to 2MHz

= Full Load

OUT

= +25°C

T

C

case (except pin 8) at 50 0 VD C,
TC = +25°C

TC = +25°C

Overload, TC = +25°C
Short Circuit, TC = +25°C

= Full Load

OUT

50% Load
No Load
50% Load
No Load
50% 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

= O and Full Load

I

OUT

= O and Full Load

I

OUT

Condition

≤ +125°C,

C

= 28 VDC ±5%, CL=0,

8

100% Load

135

50%

135

100%

135

50% Load

335

No lLoad

335

Group A

Subgroups

2,3

2,3

1,2,3

1,2,3

1,2,3,

4,5,6
4,5,6

AHV2812D

AHV2815D

Min Max Min Max Units

mA

mV
mV
mV

mA
mA

mAp-p

V
V

11.88

±

11.76

±

1

12.12

±

12.24

±

±

625

30
60

120

18
65

50

±
±

14.85

14.70

0.0

15.15

±

15.30

±

500

±

35
75

150

18
65

50
1 72 72 %

1 100 100

4 200 200

1

4

4
4
4
4
4

4
4
4
4

8,5

8.5

450

-300

-500

550

+300
+500

70

1500

5

1200

-1500
4
4

600

10

8.5

8.5

450

-300

-500

550

+300
+500

70

1500

5

1500

-1500
4
4

600

10

MΩ

F

µ

W
W

KHz

mVpk
mVpk

S

µ

S

µ

ms

mVpk
mVpk

s

µ

s

µ

mVpk

ms

For Notes to Specifications, refer to page 5

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