IRF AHF2805D 28v input, single and dual output Datasheet

PD - 94541
AHF28XX SERIES
ADVANCED ANALOG
HYBRID-HIGH RELIABILITY
DC/DC CONVERTERS
28V Input, Single and Dual Output
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 requirements of MIL-STD-704D. The basic circuit utilizes a
pulse width modulated, feed-forward topology 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 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 characteristics. This feedback method is also inherently temperature and radiation insensitive. This gives the AHF
Series an important advantage over converters that
incorporate opto-couplers in their design.
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. Four
screening grades are available to satisfy a wide range
of requirements. The CH grade converters are fully compliant to MIL-PRF-38534 class H. The HB grade converters are processed to full MIL-PRF-38534 screening but do not have class H element evaluation as required 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.
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AHF
Features
n 16 to 40 VDC Input Range (28 VDC Nominal)
n Single and Dual Outputs
n 12 Watts Output Power
n 22.8 W/in3 Power Density
n Low Input / Output Noise
(50mA/60mVp-p max. respectively)
n Indefinite Short Circuit and Overload
Protection
n Wideband Control Loop for
Superior Transient Characterstics
n No Derating for -55°C to +125°C Opertation
n Constant Switching Frequency
(550KHz Nominal)
Extensive computer simulation using complex
modeling enables rapid design modification to
be provided. Contact Advanced Analog with specific requirements.
1
10/08/02
AHF28XX Series
Specifications
n
AHF2805S
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Soldering Temperature
Case Temperature
-0.5V to 50V
300°C for 10 seconds
Operating -55°C to +125°C
Storage -65°C to +135°C
Table I. Electrical Performance Characteristics
Test
Symbol
Conditions
-55°C ≤ Tc ≤ +125°C
Vin = 28 Vdc ±5%, CL = 0
Unless otherwise specified
Limits
Group A
Subgroups
Device
Types
1
2,3
01
Unit
Min
Max
4.95
4.90
5.05
5.10
V
Output voltage
VOUT
IOUT = 0
Output current1
IOUT
VIN = 16, 28, and 40 V dc
1,2,3
01
2400
mA
Output ripple
voltage2
VRIP
VIN = 16, 28, and 40 V dc,
B.W. = 20 Hz to 2MHz
1,2,3
01
60
mV p-p
Line regulation
VRLINE
VIN = 16, 28, and 40 V dc,
Iout = 0, 500, and 1000 mA
1,2,3
01
25
mV
Load regulation
VRLOAD
VIN = 16, 28, and 40 V dc,
IOUT = 0, 500, and 1000 mA
1,2,3
01
50
mV
IIN
IOUT = 0, inhibit (pin 1)
tied to input return (pin 7)
IOUT = 0,
inhibit (pin 1) = open
1,2,3
01
12
1,2,3
01
1
2,3
01
76
74
%
100
MΩ
Input current
mA
30
Input ripple current2
IRIP
IOUT = 1000mA
B.W. = 20 Hz to 2MHz
Efficiency
EFF
IOUT = 1000mA
Isolation
ISO
Input to output or any pin
To case (except pin 6) at
500V dc Tc = +25°C
1
01
Capacitive load3,4
CL
No effect on dc
performance, Tc = +25°C
4
01
500
µF
Power dissipation
load fault
PD
Overload 5
Short circuit
1
1,2,3
01
01
6
2
W
Switching
frequency
FS
IOUT = 1000mA
4,5,6
01
600
kHz
50
500
mA p-p
For Notes to Specifications, refer to page 3
2
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AHF28XX Series
AHF2805S
Table I. Electrical Performance Characteristics - continued
Test
Output response to
step transient load
changes6
Symbol
VOTLOAD
Conditions
-55°C ≤ Tc ≤ +125°C
Vin = 28 Vdc ±5%, CL = 0
unless otherwise specified
Limits
Group A
Subgroups
Device
Types
Min
Max
Unit
1200 mA to/from 2400mA
4,5,6
01
-300
+300
mV pk
0 mA to/from 1200mA
4,5,6
-500
+500
mV pk
Recovery time step
transient load
changes6.7
TTLOAD
1200 mA to/from 2400mA
0 mA to 1200 mA
500 mA to 0 mA
4,5,6
4,5,6
4,5,6
01
70
1200
8
µs
ms
ms
Output response to
transient step line
changes
VOTLINE
Input step 16 V to/from
40 V dc, IOUT = 2400mA 4, 8
4,5,6
01
500
mV pk
Recovery time
transient step line
changes
TTLINE
Input step 16 V to/from 40Vdc
IOUT = 2400mA 4, 7, 8
4,5,6
01
800
µs
Turn on overshoot
VTonOS
IOUT = 0 and 2400mA
4,5,6
01
600
mV pk
4,5,6
01
20
ms
4,5,6
01
20
ms
35
grams
Turn on delay
TonD
Load fault
recovery4,9
TrLF
Weight
IOUT = 0 and 2400mA
9
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 VOUT has returned to within ±1
percent of VOUT at 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.
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3
AHF28XX Series
Specifications
n
AHF2812S
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Soldering Temperature
Case Temperature
-0.5V to 50V
300°C for 10 seconds
Operating -55°C to +125°C
Storage -65°C to +135°C
Table II. Electrical Performance Characteristics
Test
Symbol
Conditions
-55°C ≤Tc ≤ +125°C
Vin = 28 Vdc ±5%, CL = 0
Unless otherwise specified
Output voltage
VOUT
IOUT = 0
Output current1
IOUT
Output ripple
voltage2
VRIP
Group A
Subgroups
Limits
Device
Types
Unit
Min
Max
11.88
11.76
12.12
12.24
V
1
2,3
01
VIN = 16, 28, and 40 V dc
1,2,3
01
1000
mA
VIN = 16, 28, and 40 V dc,
B.W. = 20 Hz to 2MHz
1,2,3
01
60
mV p-p
Line regulation
VRLINE
VIN = 16, 28, and 40 V dc,
Iout = 0, 500, and 1000 mA
1,2,3
01
50
mV
Load regulation
VRLOAD
VIN = 16, 28, and 40 V dc,
IOUT = 0, 500, and 1000 mA
1,2,3
01
50
mV
IIN
IOUT = 0, inhibit (pin 1)
tied to input return (pin 7)
IOUT = 0,
inhibit (pin 1) = open
1,2,3
01
12
1,2,3
01
1
2,3
01
78
75
%
100
MΩ
Input current
mA
50
Input ripple current2
IRIP
IOUT = 1000mA
B.W. = 20 Hz to 2MHz
Efficiency
EFF
IOUT = 1000mA
Isolation
ISO
Input to output or any pin
to case (except pin 6) at
500V dc Tc = +25°C
1
01
Capacitive load3,4
CL
No effect on dc
performance, Tc = +25°C
4
01
500
µF
Power dissipation
load fault
PD
Overload 5
Short circuit
1
1,2,3
01
01
6
2
W
Switching
frequency
FS
IOUT = 1000mA
4,5,6
01
600
kHz
50
500
mA p-p
For Notes to Specifications, refer to page 5
4
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AHF28XX Series
Table II. Electrical Performance Characteristics - continued
Test
Symbol
Output response
to step transient
load changes6
VOTLOAD
Recovery time
step transient
load changes6,7
TTLOAD
Conditions
-55°C ≤ Tc ≤ +125°C
Vin = 28 Vdc ±5%, CL = 0
unless otherwise specified
50 mA to/from 1000mA
Group A
Subgroups
Device
Types
4
5,6
4
5,6
01
50 mA to/from 1000mA
0 mA to 500 mA
4,5,6
4,5,6
01
500 mA to 0 mA
4,5,6
0 mA to/from 500mA
AHF2812S
Unit
Limits
Min
Max
-300
-450
-500
-750
+300
+450
+500
+750
mV pk
100
1500
µs
10
ms
Output response
to transient step
line changes
VOTLINE
Input step 16 V to/from
40 V dc, IOUT =1000mA 4, 8
4,5,6
01
1500
mV pk
Recovery time
transient step
line changes
TTLINE
Input step 16 V to/from 40Vdc
IOUT =1000mA 4, 7, 8
4,5,6
01
800
µs
IOUT = 0 and 1000mA
4,5,6
01
600
mV pk
IOUT = 0 and 1000mA 9
4,5,6
01
20
ms
4,5,6
01
20
ms
35
grams
Turn on
overshoot
VTonOS
Turn on delay
TonD
Load fault
recovery4,9
TrLF
Weight
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 VOUT has returned to within ±1
percent of VOUT at 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.
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5
AHF28XX Series
Specifications
n
AHF2815S
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Soldering Temperature
Case Temperature
-0.5V to 50V
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%, CL = 0
unless otherwise specified
Output voltage
VOUT
IOUT = 0
Output current1
IOUT
Output ripple
voltage2
VRIP
Line regulation
Load regulation
Input current
VRLINE
Group A
Subgroups
Limits
Device
Types
Unit
Min
Max
14.85
14.70
15.15
15.30
V
1
2,3
All
VIN = 18, 28, and 40 V dc
1,2,3
All
2000
mA
VIN = 18, 28, and 40 V dc,
B.W. = 20 Hz to 2 MHz
1,2,3
All
50
mV p-p
1
2,3
All
±35
±75
mV
1,2,3
All
±150
mV
1,2,3
All
18
50
mA
1,2,3
All
20
mA p-p
1
2,3
All
80
77
%
100
MΩ
VIN = 18, 28, and 40 V dc,
Iout = 0, 1000, and 2000 mA
VRLOAD
VIN = 18, 28, and 40 V dc,
IOUT = 0, 1000, and 2000 mA
IIN
IOUT = 0, inhibit (pin 2)
tied to input return (pin 10)
IOUT = 0,
inhibit (pin 2) = open
Input ripple current2
IRIP
IOUT = 2000mA,
B.W. = 20 Hz to 2 MHz
Efficiency
EFF
IOUT = 2000mA
Isolation
ISO
Input to output or any pin
to case (except pin 7) at
500 V dc Tc = +25°C
1
All
4
All
200
µF
6
2
W
Capacitive load3,4
CL
No effect on dc performance,
Tc = +25°C
Power dissipation
load fault
PD
Overload 5
Short circuit
1
1,2,3
All
All
Switching frequency
FS
IOUT = 2000mA
4,5,6
01, 04
02, 05
03, 06
250
250
275
300
270
300
kHz
For Notes to Specifications, refer to page 7
6
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AHF28XX Series
AHF2815S
Table III. Electrical Performance Characteristics - continued
Test
Symbol
Conditions
-55°C ≤ Tc ≤ +125°C
Vin = 28 Vdc ±5%, CL = 0
unless otherwise specified
Group A
Subgroups
Device
Types
Unit
Limits
Min
Max
-800
+800
-1000
+750
Output response to
step transient load
Changes
VOTLOAD
6
Recovery time step
1000 mA to/from 2000mA
4,5,6
0 mA to/from 1000mA
4,5,6
4
TTLOAD
transient load
1000 mA to/from 2000mA
Changes6,7
0 mA to/from 1000 mA
All
All
100
5,6
4
All
5,6
Output response to
transient step line
mV pk
200
µs
5
ms
10
04
VOTLINE
Input step 18 V to/from
4,5,6
-1000
+1000
mV pk
500
µs
05
40 V dc, IOUT = 2000mA 4, 8
changes
06
Recovery time
transient step line
04
TTLINE
Input step 18 V to/from 40Vdc
4,5,6
05
IOUT = 2000mA 4, 7, 8
changes
06
Turn on overshoot
VTonOS
Turn on delay
TonD
Load fault
TrLF
IOUT = 0 and 2000mA
4,5,6
All
750
mV pk
IOUT = 0 and 2000mA 9
4,5,6
All
12
ms
4,5,6
All
12
ms
38
grams
recovery4,9
Weight
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 VOUT has returned to within ±1
percent of VOUT at 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.
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7
AHF28XX Series
Specifications
n
AHF2805D
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Soldering Temperature
Case Temperature
-0.5V to 50V
300°C for 10 seconds
Operating -55°C to +125°C
Storage -65°C to +135°C
Table IV. Electrical Performance Characteristics
Test
Symbol
Output voltage
VOUT
Conditions
-55°C ≤ Tc ≤+125°C
Vin = 28 Vdc ±5%, CL = 0
unless otherwise specified
IOUT = 0
Group A
Subgroups
1
01
2,3
Output current1,2
Limits
Device
Types
Unit
Min
Max
±4.95
±5.05
±4.90
±5.10
0.12
1.08
A
V
VIN = 16, 28, and 40 V dc,
IOUT
Output ripple
each output
1,2,3
01
1,2,3
01
60
mV p-p
1,2,3
01
30
mV
1,2,3
01
30
mV
1,2,3
01
±10
%
1,2,3
01
12
mA
VIN = 16, 28, and 40 V dc,
voltage3
VRIP
B.W. = 20 Hz to 2 MHz
VIN = 16, 28, and 40 V dc,
Line regulation4
VRLINE
Iout = 0, 1200, and 2400 mA
VIN = 16, 28, and 40 V dc,
Load regulation4
VRLOAD
IOUT = 0, 1200, and 2400 mA
10 percent to 90 percent
Cross regulation5
VRcros
load change
IOUT = 0, inhibit (pin 1)
Input current
IIN
tied to input return (pin 7)
IOUT =0, inhibit (pin 1) = open
Input ripple
IRIP
current3,4
Efficiency
IOUT = 2400mA
B.W. = 20 Hz to 2 MHz
4
EFF
60
IOUT = 2400mA,
TC =+25°C
1,2,3
01
1,3
50
mA p-p
75
2
01
72
%
1
01
100
MΩ
4
01
Input to output or any pin
Isolation
ISO
to case (except pin 6) at
500V dc, TC = +25°C
No effect on dc
6,7
Capacitive load
CL
performance, TC = +25°C,
200
µF
total for both outputs
For Notes to Specifications, refer to page 9
8
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AHF28XX Series
AHF2805D
Table IV. Electrical Performance Characteristics - continued
Test
Power dissipa-
Symbol
PD
tion load fault
Switching
frequency4
Output response
to step transient
load changes4,9
Recovery time
step transient load
changes4,9,10
FS
Device
Types
1,2,3
IOUT = 2400mA
1200 mA to/from 2400mA
4,5,6
4,5,6
0 mA to/from 1200 mA
4,5,6
1200 mA to/from 2400mA
4,5,6
Unit
Limits
Min
VOTLOAD
Max
6
01
2
W
01
500
600
kHz
01
-400
-800
+400
+800
mV pk
01
70
µs
TTLOAD
VOTLINE
Recovery time
transient step line
changes4,7,10,11
TTLINE
Load fault
recovery7
Group A
Subgroups
Short circuit, TC = +25°C
Output response
transient step line
changes4,7,11
Turn on
overshoot4
Turn on delay4,12
Conditions
-55°C ≤ Tc ≤+125°C
Vin = 28 Vdc ±5%, CL = 0
unless otherwise specified
Overload, TC = +25°C 8
VTonOS
TonD
TrLF
Weight
0 mA to/from 1200 mA
4,5,6
Input step from/to 16 to
40 V dc, IOUT =2400mA
100
4,5,6
01
Input step from/to 16 to 40 V
dc, IOUT =2400mA
4,5,6
IOUT =0 and 2400mA
IOUT = 0 and 2400mA
-400
+400
mV pk
01
1200
µs
4,5,6
01
600
mV pk
4,5,6
01
25
ms
4,5,6
01
25
ms
38
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 +VOUT and –VOUT.
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 VOUT has returned to within ±1
percent of VOUT at 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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9
AHF28XX Series
Specifications
n
AHF2812D
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Soldering Temperature
Case Temperature
-0.5V to 50V
300°C for 10 seconds
Operating -55°C to +125°C
Storage -65°C to +135°C
Table V. Electrical Performance Characteristics
Test
Output voltage
Symbol
VOUT
Conditions
-55°C ≤ Tc ≤ +125°C
Vin = 28 Vdc ±5%, CL = 0
unless otherwise specified
IOUT = 0
Group A
Subgroups
1
01
2,3
Output current1,2
Unit
Min
Max
±11.88
±12.12
±11.76
±12.24
100
900
mA
V
VIN = 16, 28, and 40 V dc,
IOUT
each output
VRIP
B.W. = 20 Hz to 2 MHz
Output ripple
voltage3
Limits
Device
Types
1,2,3
01
1,2,3
01
60
mV p-p
1,2,3
01
30
mV
1,2,3
01
30
mV
1,2,3
01
3.0
%
1,2,3
01
12
mA
VIN = 16, 28, and 40 V dc,
VIN = 16, 28, and 40 V dc,
Line regulation4
VRLINE
Load regulation4
VRLOAD
Cross regulation5
VRcros
Iout = 0, 500, and 1000 mA
VIN = 16, 28, and 40 V dc,
IOUT = 0, 500, and 1000 mA
10 percent to 90 percent
load change
IOUT = 0, inhibit (pin 1)
Input current
IIN
tied to input return (pin 7)
IOUT =0, inhibit (pin 1) = open
Input ripple
IRIP
current3,4
Efficiency
IOUT = 1000mA
B.W. = 20 Hz to 2 MHz
4
EFF
60
IOUT = 1000mA,
TC =+25°C
1,2,3
01
1,3
50
mA p-p
77
2
01
74
%
1
01
100
MΩ
4
01
Input to output or any pin
Isolation
ISO
to case (except pin 6) at
500V dc, TC = +25°C
No effect on dc
Capacitive load6,7
CL
performance, TC = +25°C,
200
µF
total for both outputs
For Notes to Specifications, refer to page 11
10
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AHF28XX Series
AHF2812D
Table V. Electrical Performance Characteristics - continued
Test
Power dissipa-
Symbol
PD
tion load fault
Switching
frequency4
Output response
to step transient
load changes4,9
Recovery time
step transient load
changes4,9,10
FS
Limits
Device
Types
Min
1,2,3
IOUT = 1000mA
500 mA to/from 1000mA
4,5,6
4,5,6
0 mA to/from 500 mA
4,5,6
500 mA to/from 1000mA
4,5,6
VOTLOAD
Unit
Max
6
01
2
W
01
500
600
kHz
01
-200
-800
+200
+800
mV pk
01
70
µs
TTLOAD
VOTLINE
Recovery time
transient step line
changes4,7,10,11
TTLINE
Load fault
recovery7
Group A
Subgroups
Short circuit, TC = +25°C
Output response
transient step line
changes4,7,11
Turn on
overshoot4
Turn on delay4,12
Conditions
-55°C ≤ Tc ≤+125°C
Vin = 28 Vdc ±5%, CL = 0
unless otherwise specified
Overload, TC = +25°C 8
VTonOS
TonD
TrLF
Weight
0 mA to/from 500 mA
4,5,6
Input step from/to 16 to
40 V dc, IOUT =1000mA
1000
4,5,6
01
Input step from/to 16 to 40 V
dc, IOUT =1000mA
4,5,6
IOUT =0 and 1000mA
IOUT = 0 and 1000mA
-750
+750
mV pk
01
1200
µs
4,5,6
01
600
mV pk
4,5,6
01
25
ms
4,5,6
01
25
ms
38
grams
Notes to Specifications
1.
2.
3.
4.
5.
6.
Parameter guaranteed by line load and cross regulation tests.
Up to 90 percent of full power is available from either output provided the total output does not exceed 12W.
Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz.
Load current split equally between +VOUT and –VOUT.
1.2 watt load on output under test, 1.2 watt to 10.8 watt load change on other output.
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 VOUT has returned to within ±1
percent of VOUT at 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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11
AHF28XX Series
Specifications
n
AHF2815D
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Soldering Temperature
Case Temperature
-0.5V to 50V
300°C for 10 seconds
Operating -55°C to +125°C
Storage -65°C to +135°C
Table VI. Electrical Performance Characteristics
Test
Symbol
Conditions
-55°C ≤ Tc ≤+125°C
Vin = 28 Vdc ±5%, CL = 0
Unless otherwise specified
Output voltage
VOUT
IOUT = 0
Output current1,2
IOUT
Output ripple
voltage3
Group A
Subgroups
Limits
Device
Types
Unit
Min
Max
1
2,3
01
±14.85
±14.70
±15.15
±15.30
V
VIN = 16, 28, and 40 V dc,
each output
1,2,3
01
80
720
mA
VRIP
VIN = 16, 28, and 40 V dc,
B.W. = 20 Hz to 2 MHz
1,2,3
01
60
mV p-p
Line regulation4
VRLINE
VIN = 16, 28, and 40 V dc,
Iout = 0, 400, and 800 mA
1,2,3
01
35
mV
Load regulation4
VRLOAD
VIN = 16, 28, and 40 V dc,
IOUT = 0, 400, and 800 mA
1,2,3
01
35
mV
Cross regulation5
VRcros
10 percent to 90 percent
load change each output
1,2,3
01
3.0
%
IIN
IOUT = 0, inhibit (pin 1)
tied to input return (pin 7)
IOUT = 0,
inhibit (pin 1) = open
1,2,3
01
12
mA
1,2,3
01
1,3
2
01
78
75
%
1
01
100
MΩ
4
01
Input current
Input ripple
current3,4
IRIP
IOUT = 800mA
B.W. = 20 Hz to 2 MHz
Efficiency4
EFF
IOUT = 800mA
Isolation
ISO
Capacitive load6,7
CL
Input to output or any pin
to case (except pin 6) at 500
V dc, TC = +25°C
No effect on dc
performance,
TC = +25°C, total for both
outputs
55
50
200
mA p-p
µF
For Notes to Specifications, refer to page 13
12
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AHF28XX Series
Table VI. Electrical Performance Characteristics - continued
Test
Power dissipation
load fault
Switching
frequency4
Symbol
Conditions
-55°C ≤ Tc ≤ +125°C
Vin = 28 Vdc ±5%, CL = 0
Unless otherwise specified
8
Group A
Subgroups
AHF2815D
Limits
Device
Types
Min
PD
Overload
Short circuit
1,2,3
01
FS
IOUT = 800 mA
4,5,6
01
Unit
Max
6
2
W
500
600
kHz
-200
-800
+200
+800
mV pk
µs
Output response
to step transient
load changes4,9
VOTLOAD
400 mA to/from 800 mA
0 mA to/from 400 mA
4,5,6
4,5,6
01
01
Recovery time
step transient load
changes4,9,10
TTLOAD
400 mA to/from 800 mA
4,5,6
01
70
0 mA to/from 400 mA
4,5,6
01
500
Input step from/to 16 to
40 V dc, IOUT=800mA
4,5,6
01
Output response
transient step line
changes4,7,11
Recovery time
transient step line
changes4,7,10,11
Turn on
overshoot4
Turn on delay4,12
Load fault
recovery7
VOTLINE
-750
+750
mV pk
TTLINE
Input step from/to 16 to
40Vdc, IOUT =800mA
4,5,6
01
1200
µs
VTonOS
IOUT=0 and 800mA
IOUT = 0 and 800mA
4,5,6
01
750
mV pk
TonD
4,5,6
01
25
ms
TrLF
4,5,6
01
25
ms
38
grams
Weight
Notes to Specifications
1.
2.
3.
4.
5.
6.
Parameter guaranteed by line load and cross regulation tests.
Up to 90 percent of full power is available from either output provided the total output does not exceed 12W.
Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz.
Load current split equally between +VOUT and –VOUT.
1.2 watt load on output under test, 1.2 watt to 10.8 watt load change on other output.
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 VOUT has returned to within ±1
percent of VOUT at 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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13
AHF28XX Series
AHF28XX ( Single Output ) Block Diagram
EMI
F ilter
8
+ Input
4 + V o ut
U n der-V o ltag e
D e tec tor
3
P rim a ry
H o use kee ping
S u pply
1
E n able
R e turn
6
D rive
C a se
P u lse W idth
FB
M odu lato r
CS
E rror
Amp &
Ref
In put
R e turn
7
AHF28XX ( Dual Output ) Block Diagram
EMI
Filter
8
+Input
2 +V out
U nder-V oltage
D etector
1
E nable
6
C ase
3 R eturn
P rim ary
H ousekeeping
S upply
4
-V out
D rive
P ulse W idth
FB
M odulator
CS
E rror
Amp &
R ef
Input
R eturn
7
14
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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 TAMBIENT = +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
Assuming that there is no forced air flow, the package temperature rise above ambient (∆T) may be calculated using
the following expression:
∆T ≈ 80 A –0.7p 0.85 (°C)
A
HEAT SINK
 ∆Τ 

0.85 
 80Ρ 
−1.43
− Α PKG
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:
where A = the effective surface area in square inches (including heat sink if used), P = power dissipation in watts.
The total surface area of the AHF package is 4.9 square
inches. If a worse case full load efficiency of 78% is assumed, then the case temperature rise can be calculated
as follows:
=
Α HEATSINK


50
=
0.85 
 80(3.4) 
−1.43
− 4.9 = 3.75in. 2
 1

 1

P = POUT 
− 1 = 12 
− 1 = 3.4W
 0.78 
 Eff

∆T = 80 (4.9)-0.7 (3.4)0.85 = 74°C
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15
AHF28XX Series
AHF28XX Case Outlines
Non-Flanged
0 .2 0 5
(5 .2 1 )
0 .0 3 0 d ia ., 8 p in s
(0 .7 6 0 )
8
1
0 .9 0 5
(2 2 .9 9 )
2
7
0 .5 0 5
(1 2 .8 3 )
1 .1 0 5
(2 8 .0 7 )
3
1 .4 5 0
(3 6 .8 3 )
4
6
0 .7 0 5
(1 7 .9 1 )
5
0 .8 0 0
(2 0 .3 2 )
0 .0 9 0 R T y p
(2 .2 9 0 )
1 .1 2 0
(2 8 .4 5 )
0 .2 6 0
(6 .6 0 0 )
0 .3 3 0
(8 .3 8 0 )
MAX
Flanged
Pin Designation
AHF28XXS
Pin
No.
16
Designation
Part Numbering
AHF 28 05 S F / CH
AHF28XXD
Pin
No.
Designation
M od el
S creening
Inpu t V oltage
1
Enable
1
Enable
2
N/C
2
+ Output
3
Output Return
3
Output Return
4
+ Output
4
- Output
5
N/C
5
N/C
6
Case
6
Case
7
Input Return
7
Input Return
8
+ Input
8
+ Input
28 = 28V
O utput V oltage
5 = ±5 , 1 2 = ±1 2 ,
1 5 = ±1 5
–
, ES, H B, CH
P ackage O ption s
F = F la n g e
O m it fo r S ta n d a rd
O utputs
S = S in g le
D = Dual
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AHF28XX Series
Available Screening Levels and Process Variations for AHF28XX Series
Requirement
Temperature
Range
Element
Evaluation
Internal Visual
Temperature
Cycle
Constant
Acceleration
Burn-in
Final Electrical
(Group A)
Seal, Fine &
Gross
External
Visual
MIL-STD-883
Method
No
Suffix
-20 to +85°C
ES
Suffix
-55°C to +125°C
HB
Suffix
-55°C to +125°C
CH
Suffix
-55°C to +125°C
MIL-PRF-38534
2017
1010
∗
2001
Yes
Cond B
Yes
Cond C
Yes
Cond C
500g
Cond A
Cond A
1015
MIL-PRF38534
48hrs @ 85°C
25°C
48hrs @ 125°C
25°C
160hrs @ 125°C
-55, +25, +125°C
160hrs @ 125°C
-55, +25, +125°C
1014
∗
Cond A, C
Cond A, C
Cond A, C
2009
∗
Yes
Yes
Yes
* Per Commercial Standards
Available Standard Military Drawing (SMD) Cross Reference
Standardized
Military Drawing
Pin
5962-9160001
5962-9456801
5962-9456301
5962-9211101
5962-9235101
Vendor
CAGE
Code
52467
52467
52467
52467
52467
Vendor
Similar
Pin
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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17
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