International Rrectifier AFL50XXS User Manual

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PD - 94457A

AFL50XXS SERIES

ADVANCED ANALOG
HIGH RELIABILITY
HYBRID DC/DC CONVERTERS

Description

The AFL Series of DC/DC converters feature high power
density with no derating over the full military tempera­ture range. This series is offered as part of a complete
family of converters providing single and dual output
voltages and operating from nominal +28, +50, +120 or
+270 volt inputs with output power ranging from 80 to
120 watts. For applications requiring higher output
power, individual converters can be operated in paral­lel. The inter nal current sharing circuits assure equal
current distribution among the paralleled converters. This
series incorporates Advanced Analog’s proprietary mag­netic pulse feedback technology providing optimum
dynamic line and load regulation response. This feed­back system samples the output voltage at the pulse
width modulator fixed clock frequency, nominally 550
KHz. Multiple converters can be synchronized to a sys­tem clock in the 500 KHz to 700 KHz range or to the
synchronization output of one converter. Under voltage
lockout, primary and secondary referenced inhibit, soft­start and load fault protection are provided on all mod­els.

These converters are hermetically packaged in two en­closure variations, utilizing copper core pins to mini­mize resistive DC losses. Three lead styles are avail­able, each fabricated with Advanced Analog’s rugged
ceramic lead-to-package seal assuring long term
hermeticity in the most harsh 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 MIL-H­38534 for class H. The HB grade is fully processed and
screened to the class H requirement, 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

50V Input, Single Output

AFL

Features

n 30 To 80 V olt Input Range
n 3.3, 5, 8, 9 12, 15, 24 and 28 Volts Outputs

Available

n High Power Density - up to 84 W / in
n Up To 120 Watt Output Power
n Parallel Operation with Stress and Current

Sharing

n Low Profile (0.380") Seam Welded Package
n Ceramic Feedthru Copper Core Pins
n High Efficiency - to 85%
n Full Military Temperature Range
n Continuous Short Circuit and Overload

Protection

n Remote Sensing Terminals
n Primary and Secondary Referenced

Inhibit Functions

n Line Rejection > 40 dB - DC to 50KHz
n External Synchronization Port
n Fault Tolerant Design
n Dual Output Versions Available
n Standard Military Drawings Available

temperature range without output power deration.
Two grades with more limited screening are also
available for use in less demanding applications.
Variations in electrical, mechanical and screen­ing can be accommodated. Contact Advanced
Analog for special requirements.

3

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07/09/02

AFL50XXS Series

Specifications

ABSOLUTE MAXIMUM RATI NGS

Input Voltage -0.5V to 100V
Soldering Temperature 300°C for 10 se conds
Case Temperature Operating -55°C to +125°C

Static Characteristics -55°C

Parameter

INPUT VOLTAGE
OUTPUT VOLTAGE

AFL5005S
AFL5008S
AFL5009S
AFL5012S
AFL5015S
AFL5028S

AFL5005S
AFL5008S
AFL5009S
AFL5012S
AFL5015S
AFL5028S

Storage -65°C to +135°C

< T

< +125°C, 30V< VIN < 80V unless otherwise specified.

CASE

Group A

Subgroups

Note 6 30 50 80 V

VIN = 50 Volts, 100% Load

1
1
1
1
1
1

2, 3
2, 3
2, 3
2, 3
2, 3
2, 3

Test Conditions

Min Nom Max Unit

4.95

7.92

8.91

11.88

14.85

27.72

4.90

7.84

8.82

11.76

14.70

27.44

5.00

8.00

9.00

12.00

15.00

28.00

5.05

8.08

9.09

12.12

15.15

28.28

5.10

8.16

9.18

12.24

15.30

28.56

V
V
V
V
V
V

V
V
V
V
V
V

OUTPUT CURRENT

AFL5008S
AFL5009S
AFL5012S
AFL5015S
AFL5028S

OUTPUT POWER

AFL5005S
AFL5008S
AFL5009S
AFL5012S
AFL5015S
AFL5028S

MAXIMUM CAPACITIVE LOAD
OUTPUT VOLTAGE

TEMPERATURE COEFFICIENT
OUTPUT VOLTAGE REGULATION

AFL5028S Line
All Others Line

Load

OUTPUT RIPPLE VOLTAGE

AFL5005S
AFL5008S
AFL5009S
AFL5012S
AFL5015S
AFL5028S

For Notes to Specifications, refer to page 4

AFL5005S

Note 1 10,000

1, 2, 3
1, 2, 3

1, 2, 3

1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3

VIN = 30, 50, 80 Volts - Note 6

Note 6

VIN = 50 Volts, 100% Load - Note 1, 6

No Load, 50% Load, 100% Load
VIN = 30, 50, 80 Volts

VIN = 30, 50, 80 Volts, 100% Load,
BW = 10MHz

-0.015 +0.015 %/°C

-70.0

-20.0

-1.0

16.0

10.0

10.0

9.0

8.0

4.0

80
80

90
108
120
112

+70.0
+20.0

+1.0

30

40

40

45

50
100

A
A
A
A
A
A

W
W
W
W
W
W

µ

fd

mV
mV

%

mV

pp

mV

pp
mVpp
mV

pp
mV

pp
mVpp

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Static Characteristics (Continued)

AFL50XXS Series

Parameter

INPUT CURRENT

No Load

Inhibit 1
Inhibit 2

INPUT RIPPLE CURRENT

AFL5005S
AFL5008S
AFL5009S
AFL5012S
AFL5015S
AFL5028S

CURRENT LIMIT POINT
As a percentage of full rated load

LOAD FAULT POWER DISSIPATION

Overload or Short Circuit

EFFICIENCY

AFL5005S
AFL5008S
AFL5009S
AFL5012S
AFL5015S
AFL5028S

ENABLE INPUTS

Sink Current
Converter On
Sink Current

SWITCHING FREQUENCY
SYNCHRONIZATION INPUT

Pulse Amplitude, Hi
Pulse Amplitude, Lo
Pulse Rise Time
Pulse Duty Cycle

ISOLATION

DEVICE WEIGHT
MTBF

(Inhibit Function)

Converter Off

Frequency Range

Group A

Subgroups

1

2, 3
1, 2, 3
1, 2, 3

1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3

1
2
3

1, 2, 3

1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3

1, 2, 3
1, 2, 3

1, 2, 3 500 550 600 KHz

1, 2, 3
1, 2, 3
1, 2, 3

1 Input to Output or Any Pin to Case

Slight Variations with Case Style 85 gms

Test Conditions

VIN = 50 Volts
I

= 0

OUT

Pin 4 Shorted to Pin 2
Pin 12 Shorted to Pin 8

VIN = 50 Volts, 100% Load, BW = 10MHz

V

= 90% V

OUT

Note 5

= 50 Volts

V

IN

V

= 50 Volts, 100% Load

IN

Logical Low on Pin 4 or Pin 12
Note 1
Logical High on Pin 4 and Pin 12 - Note 9
Note 1

Note 1
Note 1

(except Pin 3). Test @ 500VDC

MIL-HDBK-217F, AIF @ TC = 40°C

, VIN = 50 Volts

NOM

Min Nom Max Unit

115
105
125

81

78

82

79

83

80

84

81

85

82

84

82

-0.5

2.0

500

2.0

-0.5
20

100

300 KHrs

50
60

125
115
140

0.8

100
100

700

0.8

100

mA
mA
mA

5

mA

5

60
60
60
60
60
60

32

50

10

80

mA

pp

mA

pp

mA

pp

mA

pp

mA

pp

mApp

%
%
%

W

%
%
%
%
%
%

V

A

µ

V

A

µ

KHz

V
V

nSec

%

MΩ

For Notes to Specifications, refer to page 4

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AFL50XXS Series

Dynamic Characteristics -55°C < T

Parameter

LOAD TRANSIENT RESPONSE

AFL5005S Amplitude

Recovery
Amplitude

Recovery

AFL5008S Amplitude

Recovery
Amplitude

Recovery

AFL5009S Amplitude

Recovery
Amplitude

Recovery
AFL5012S Amplitude

Recovery
Amplitude

Recovery
AFL5015S Amplitude

Recovery
Amplitude

Recovery

AFL5028S Amplitude

Recovery
Amplitude

Recovery

LINE TRANSIENT RESPONSE

Amplitude

Group A

Subgroups

4, 5, 6
4, 5, 6

4, 5, 6
4, 5, 6

4, 5, 6
4, 5, 6

4, 5, 6
4, 5, 6

4, 5, 6
4, 5, 6

4, 5, 6
4, 5, 6

4, 5, 6
4, 5, 6

4, 5, 6
4, 5, 6

4, 5, 6
4, 5, 6

4, 5, 6
4, 5, 6

4, 5, 6
4, 5, 6

4, 5, 6
4, 5, 6

< +125°C, VIN=50V unless otherwise specified.

CASE

Test Conditions

Note 2, 8
Load Step 50% ⇔ 100%

Load Step 10% ⇔ 50%

Load Step 50% ⇔ 100%

Load Step 10% ⇔ 50%

Load Step 50% ⇔ 100%

Load Step 10% ⇔ 50%

Load Step 50% ⇔ 100%

Load Step 10% ⇔ 50%

Load Step 50% ⇔ 100%

Load Step 10% ⇔ 50%

Load Step 50% ⇔ 100%

Load Step 10% ⇔ 50%

Note 1, 2, 3
VIN Step = 30 ⇔ 80 Volts

Recovery

TURN-ON CHARACTERISTICS

Overshoot
Delay

LOAD FAULT RECOVERY
LINE REJECTION

VIN = 30, 50, 80 Volts. Note 4

4, 5, 6
4, 5, 6

Enable 1, 2 on. (Pins 4, 12 high or

open)
Same as Turn On Characteristics .
MIL-STD-461D, CS101, 30Hz to 50KHz

Note 1

Notes to Sp ecificat ions:

1. Parameters not 100% tested but ar e guaranteed to the limits specified in th e ta ble.

2. Recovery time is measured fr om th e in itiation of the transient to where V

3. Line transient transition time ≥ 100 µSec.

4. Turn-on delay is measured w ith an input voltage rise time of between 10 0 and 500 volts per millisecond.

5. Current limit point is that condition of ex cess load causing output voltage to drop to 90% of nom in al.

6. Parameter verified as part of anot her test.

7. All electrical tests are performed with the re mote sense leads connected to the output leads at the load.

8. Load transient transition time ≥ 10 µSec.

9. Enable inputs internally pulled high. Nom in al open circuit voltage ≈ 4.0VDC.

has returned to within ±1% of V

OUT

Min Nom Max Unit

-450

-450

-500

-500

-600

-600

-750

-750

-750

-750

-1200

-1200

-500

50

450
200

450
300

500
200

500
300

600
200

600
300

750
200

750
300

750
200

750
300

1200

200

1200

300

500
500

75

250
120

mV

µSec

mV

µSec

mV

µSec

mV

µSec

mV

µSec

mV

µSec

mV

Sec

µ

mV

Sec

µ

mV

Sec

µ

mV

Sec

µ

mV

µSec

mV

µSec

mV

µSec

mV

mSec

40 50 dB

at 50% load.

OUT

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