IRF AHF2803DF/ES Hybrid-high reliability dc-dc converter Datasheet

PD-94541D
AHF28XX SERIES
28V Input, Single and Dual Output
HYBRID-HIGH RELIABILITY
DC-DC CONVERTER
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.
AHF
Features
n
n
n
n
n
n
n
n
n
n
16V to 40VDC Input Range (28 VDC Nominal)
Single and Dual Outputs
12W Output Power
22.8W/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
No derating for -55°C to +125°C Operation
Constant Switching Frequency (550KHz Nominal)
Standard Microcircuit Drawings Available
Manufactured in a facility fully qualified to MIL-PRF38534, these converters are fabricated utilizing DSCC
qualified processes. For available screening options,
refer to device screening table in the data sheet.
Variations are electrical, mechanical and screening
can be accommodated.
Extensive computer simulation using complex modeling
enables rapid design modification to be provided.
Contact IR San Jose with specific requirements.
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1
03/09/10
AHF28XX Series
Specifications
AHF2803R3S
Absolute M axim um Ratings
Input voltage
-0.5V to +50V
Soldering temperature
300°C for 10 seconds
O perating case temperature
-55°C to +125°C
Storage case tem perature
-65°C to +135°C
Table I. Electrical Performance Characteristics
Test
Symbol
Conditions
Group A
Device
-55°C ≤ Tc ≤ +125°C
Vin = 28Vdc ±5%, CL = 0
Subgroups
Types
Unless otherwise specified
VOUT
Output voltage
Output current
1
IOUT
Output ripple voltage
2
VRIP
1
IOUT = 0
2,3
VIN = 16, 28, and 40Vdc
VIN = 16, 28, and 40Vdc,
B.W. = 20 Hz to 2MHz
01
Unit
Limits
Min
Max
3.26
3.34
3.23
3.36
V
1,2,3
01
3000
mA
1,2,3
01
60
mV p-p
1,2,3
01
25
mV
1,2,3
01
50
mV
1,2,3
01
VIN = 16, 28, and 40Vdc,
Line regulation
VRLINE
Iout = 0%, 50% and 100%
rated load
VIN = 16, 28, and 40Vdc,
Load regulation
VRLOAD IOUT = 0%, 50% and 100%
rated load
IOUT = 0, inhibit (pin 1)
IIN
Input current
tied to input return (pin 7)
IOUT = 0,
12
mA
30
inhibit (pin 1) = open
Input ripple current
2
IRIP
IOUT = 100% rated load
B.W. = 20 Hz to 2.0MHz
Efficiency
EFF
IOUT = 100% rated load
Isolation
ISO
to case (except pin 6)
1,2,3
1
2,3
50
01
01
72
mA p-p
%
70
Input to output or any pin
1
01
100
4
01
500
MΩ
at 500Vdc, Tc = +25°C
Capacitive load
3, 4
Power dissipation
load fault
Switching frequency
CL
No effect on dc performance,
Tc = +25°C
5
PD
Overload
Short circuit
1
01
6.0
1,2,3
01
2.0
FS
IOUT = 100% rated load
4,5,6
01
500
600
µF
W
KHz
For Notes to Specifications, refer to page 3
2
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AHF28XX Series
Table I. Electrical Performance Characteristics - continued
Test
Symbol
AHF2803R3S
Conditions
Group A
Device
-55°C ≤ Tc ≤ +125°C
Vin = 28Vdc ±5%, CL = 0
Subgroups
Types
Unless otherwise specified
Output response to
step transient load
6
changes
50% to/from 100%
VOTLOAD
4,5,6
rated load
0% to/from 50%
4,5,6
rated load
50% to/from 100% rated load
TTLOAD 0% to/from 50% rated load
Output response to
transient step line
changes
Input step 16V to/from
VOTLINE 40Vdc, IOUT = 100%
Turn on overshoot
Unit
Min
Max
-300
+300
-500
+500
01
Recovery time step
transient load
6, 7
changes
Recovery time
transient step line
changes
Limits
50% to/from 0% rated load
4,5,6
4,5,6
01
4,5,6
mVpk
70
µs
1200
8.0
µs
ms
4,5,6
01
500
mVpk
4,5,6
01
800
µs
4, 8
TTLINE
rated load
Input step 16V to/from
40Vdc, IOUT = 100%
4, 7, 8
rated load
VTonOS IOUT = o and 100% rated load
Turn on delay
Load fault
4, 9
recovery
Weight
TonD
TrLF
9
IOUT = o and 100% rated load
4,5,6
01
600
mVpk
4,5,6
01
20
ms
4,5,6
01
20
ms
38
g
Notes to Specifications
1. Parameter guaranteed by line and load regulation tests.
2. Bandwidth guaranteed by design. Tested for 20KHz to 2.0MHz.
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 2.0µs and 10µs.
7. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1.0
percent of VOUT at 50 percent load.
8. Input step transition time between 2.0µs and 10µs.
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
AHF2805S
Absolute M axim um Ratings
Input voltage
-0.5V to +50V
Soldering temperature
300°C for 10 seconds
O perating case temperature
-55°C to +125°C
Storage case tem perature
-65°C to +135°C
Table II. Electrical Performance Characteristics
Test
Symbol
Conditions
Group A
Device
-55°C ≤ Tc ≤ +125°C
Vin = 28Vdc ±5%, CL = 0
Subgroups
Types
Unless otherwise specified
VOUT
Output voltage
Output current
1
IOUT
Output ripple voltage
2
VRIP
1
IOUT = 0
2,3
VIN = 16, 28, and 40Vdc
VIN = 16, 28, and 40Vdc,
B.W. = 20 Hz to 2MHz
01
Unit
Limits
Min
Max
4.95
5.05
4.90
5.10
V
1,2,3
01
2400
mA
1,2,3
01
60
mV p-p
1,2,3
01
25
mV
1,2,3
01
50
mV
1,2,3
01
VIN = 16, 28, and 40Vdc,
Line regulation
VRLINE
Iout = 0%, 50% and 100%
rated load
VIN = 16, 28, and 40Vdc,
Load regulation
VRLOAD IOUT = 0%, 50% and 100%
rated load
IOUT = 0, inhibit (pin 1)
IIN
Input current
tied to input return (pin 7)
IOUT = 0,
12
mA
30
inhibit (pin 1) = open
Input ripple current
2
IRIP
IOUT = 100% rated load
B.W. = 20 Hz to 2.0MHz
Efficiency
EFF
IOUT = 100% rated load
Isolation
ISO
to case (except pin 6)
1,2,3
1
2,3
01
01
50
76
mA p-p
%
74
Input to output or any pin
1
01
100
4
01
500
MΩ
at 500Vdc, Tc = +25°C
Capacitive load
3, 4
Power dissipation
load fault
Switching frequency
CL
No effect on dc performance,
Tc = +25°C
5
PD
Overload
Short circuit
1
01
6.0
1,2,3
01
2.0
FS
IOUT = 100% rated load
4,5,6
01
500
600
µF
W
KHz
For Notes to Specifications, refer to page 5
4
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AHF28XX Series
Table II. Electrical Performance Characteristics - continued
Test
Symbol
Conditions
Group A
Device
-55°C ≤ Tc ≤ +125°C
Vin = 28Vdc ±5%, CL = 0
Subgroups
Types
Unless otherwise specified
Output response to
step transient load
6
changes
50% to/from 100%
VOTLOAD
4,5,6
rated load
0% to/from 50%
4,5,6
rated load
50% to/from 100% rated load
TTLOAD 0% to/from 50% rated load
Output response to
transient step line
changes
Input step 16V to/from
VOTLINE 40Vdc, IOUT = 100%
Turn on overshoot
50% to/from 0% rated load
Min
Max
-300
+300
-500
+500
4,5,6
4,5,6
01
4,5,6
mVpk
70
µs
1200
8.0
µs
ms
4,5,6
01
500
mVpk
4,5,6
01
800
µs
4,5,6
01
600
mVpk
4,5,6
01
20
ms
4,5,6
01
20
ms
38
g
4, 8
TTLINE
rated load
Input step 16V to/from
40Vdc, IOUT = 100%
4, 7, 8
rated load
VTonOS IOUT = o and 100% rated load
Turn on delay
Load fault
recovery
Weight
Unit
Limits
01
Recovery time step
transient load
6, 7
changes
Recovery time
transient step line
changes
AHF2805S
4, 9
TonD
TrLF
IOUT = o and 100% rated load
9
Notes to Specifications
1. Parameter guaranteed by line and load regulation tests.
2. Bandwidth guaranteed by design. Tested for 20KHz to 2.0MHz.
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 2.0µs and 10µs.
7. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1.0
percent of VOUT at 50 percent load.
8. Input step transition time between 2.0µs and 10µs.
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
5
AHF28XX Series
Specifications
AHF2812S
Absolute Maximum Ratings
Input voltage
-0.5V to +50V
Soldering temperature
300°C for 10 seconds
Operating case temperature
-55°C to +125°C
Storage case temperature
-65°C to +135°C
Table III. Electrical Performance Characteristics
Test
Symbol
Conditions
Group A
Device
-55°C ≤ Tc ≤ +125°C
Vin = 28Vdc ±5%, CL = 0
Subgroups
Types
Unless otherwise specified
VOUT
Output voltage
1
IOUT
Output current
2
Output ripple voltage
VRIP
1
IOUT = 0
2,3
VIN = 16, 28, and 40Vdc
VIN = 16, 28, and 40Vdc,
B.W. = 20 Hz to 2MHz
01
Unit
Limits
Min
Max
11.88
12.12
11.76
12.24
V
1,2,3
01
1000
mA
1,2,3
01
60
mV p-p
1,2,3
01
50
mV
1,2,3
01
50
mV
1,2,3
01
VIN = 16, 28, and 40Vdc,
Line regulation
VRLINE
Iout = 0%, 50% and 100%
rated load
VIN = 16, 28, and 40Vdc,
Load regulation
VRLOAD IOUT = 0%, 50% and 100%
rated load
IOUT = 0, inhibit (pin 1)
IIN
Input current
tied to input return (pin 7)
IOUT = 0,
12
mA
50
inhibit (pin 1) = open
2
IOUT = 100% rated load
Input ripple current
IRIP
Efficiency
EFF
IOUT = 100% rated load
Isolation
ISO
to case (except pin 6)
B.W. = 20 Hz to 2.0MHz
1,2,3
1
2,3
50
01
01
78
mA p-p
%
75
Input to output or any pin
1
01
4
01
100
MΩ
at 500Vdc, Tc = +25°C
3, 4
Capacitive load
Power dissipation
load fault
Switching frequency
CL
No effect on dc performance,
Tc = +25°C
5
500
PD
Overload
Short circuit
1
01
6.0
1,2,3
01
2.0
FS
IOUT = 100% rated load
4,5,6
01
500
600
µF
W
KHz
For Notes to Specifications, refer to page 7
6
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AHF28XX Series
Table III. Electrical Performance Characteristics - continued
Test
Symbol
Conditions
Group A
Device
-55°C ≤ Tc ≤ +125°C
Vin = 28Vdc ±5%, CL = 0
Subgroups
Types
Unless otherwise specified
Output response to
step transient load
6
changes
Recovery time step
transient load
6, 7
changes
Output response to
transient step line
changes
Recovery time
transient step line
changes
Turn on overshoot
50% to/from 100%
VOTLOAD
0% to/from 50%
4
-300
+300
-450
+450
-500
+500
-750
+750
01
4,5,6
TTLOAD 0% to/from 50% rated load
4,5,6
50% to/from 0% rated load
4,5,6
Input step 16V to/from
VOTLINE 40Vdc, IOUT = 100%
Max
5,6
5,6
50% to/from 100% rated load
Unit
Limits
Min
4
rated load
01
mVpk
100
µs
1500
10
µs
ms
4,5,6
01
1500
mVpk
4,5,6
01
800
µs
4,5,6
01
600
mVpk
4,5,6
01
20
ms
4,5,6
01
20
ms
38
g
4, 8
TTLINE
rated load
Input step 16V to/from
40Vdc, IOUT = 100%
4, 7, 8
rated load
VTonOS IOUT = o and 100% rated load
Turn on delay
Load fault
recovery
Weight
rated load
AHF2812S
4, 9
TonD
TrLF
IOUT = o and 100% rated load
9
Notes to Specifications
1. Parameter guaranteed by line and load regulation tests.
2. Bandwidth guaranteed by design. Tested for 20KHz to 2.0MHz.
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 2.0µs and 10µs.
7. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1.0
percent of VOUT at 50 percent load.
8. Input step transition time between 2.0µs and 10µs.
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
7
AHF28XX Series
Specifications
AHF2815S
Absolute Maximum Ratings
Input voltage
-0.5V to +50V
Soldering temperature
300°C for 10 seconds
Operating case temperature
-55°C to +125°C
Storage case temperature
-65°C to +135°C
Table IV. Electrical Performance Characteristics
Test
Symbol
Conditions
Group A
Device
-55°C ≤ Tc ≤ +125°C
Vin = 28Vdc ±5%, CL = 0
Subgroups
Types
Unless otherwise specified
VOUT
Output voltage
Output current
1
IOUT
Output ripple voltage
2
VRIP
1
IOUT = 0
2,3
VIN = 16, 28, and 40Vdc
VIN = 16, 28, and 40Vdc,
B.W. = 20 Hz to 2MHz
VIN = 16, 28, and 40Vdc,
Line regulation
VRLINE
Iout = 0%, 50% and 100%
rated load
All
Unit
Limits
Min
Max
14.85
15.15
14.70
15.30
V
1,2,3
All
800
mA
1,2,3
All
50
mV p-p
1
±35
All
2,3
mV
±75
VIN = 16, 28, and 40Vdc,
Load regulation
VRLOAD IOUT = 0%, 50% and 100%
1,2,3
All
1,2,3
All
±150
mV
rated load
IOUT = 0, inhibit (pin 1)
IIN
Input current
tied to input return (pin 7)
IOUT = 0,
18
mA
50
inhibit (pin 1) = open
Input ripple current
2
IRIP
IOUT = 100% rated load
B.W. = 20 Hz to 2.0MHz
Efficiency
EFF
IOUT = 100% rated load
Isolation
ISO
to case (except pin 6)
1,2,3
1
2,3
All
All
20
80
mA p-p
%
77
Input to output or any pin
1
All
4
All
100
MΩ
at 500Vdc, Tc = +25°C
Capacitive load
3, 4
Power dissipation
load fault
Switching frequency
CL
No effect on dc performance,
Tc = +25°C
5
200
PD
Overload
Short circuit
1
All
6.0
1,2,3
All
2.0
01, 04
250
300
FS
IOUT = 100% rated load
4,5,6
02, 05
250
270
03, 06
275
300
µF
W
KHz
For Notes to Specifications, refer to page 9
8
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AHF28XX Series
AHF2815S
Table IV. Electrical Performance Characteristics - continued
Test
Symbol
Conditions
Group A
Device
-55°C ≤ Tc ≤ +125°C
Vin = 28Vdc ±5%, CL = 0
Subgroups
Types
Unless otherwise specified
Output response to
step transient load
6
changes
Recovery time step
transient load
6, 7
changes
Output response to
transient step line
changes
50% to/from 100%
VOTLOAD
4,5,6
rated load
TTLOAD
50% to/from 100% rated load
TonD
IOUT = o and 100% rated load
+800
-1000
+750
mVpk
100
200
All
5.0
10
µs
ms
04
4, 8
VTonOS
-800
4
4,5,6
05
-1000
+1000
mVpk
06
rated load
Input step 16V to/from
40Vdc, IOUT = 100%
Turn on overshoot
Max
5,6
Input step 16V to/from
VOTLINE 40Vdc, IOUT = 100%
rated load
IOUT = o and 100% rated load
Min
5,6
4
0% to/from 50% rated load
TTLINE
Unit
All
0% to/from 50%
Recovery time
transient step line
changes
4,5,6
01
500
µs
4, 7, 8
Turn on delay
Load fault
recovery
Weight
4,5,6
rated load
Limits
4, 9
TrLF
9
4,5,6
All
750
mVpk
4,5,6
All
12
ms
4,5,6
All
12
ms
38
g
Notes to Specifications
1. Parameter guaranteed by line and load regulation tests.
2. Bandwidth guaranteed by design. Tested for 20KHz to 2.0MHz.
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 2.0µs and 10µs.
7. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1.0
percent of VOUT at 50 percent load.
8. Input step transition time between 2.0µs and 10µs.
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
9
AHF28XX Series
AHF2805D
Specifications
A b so lu te M axim u m R ating s
In pu t vo ltag e
-0 .5V to + 50 V
S old erin g te m p era ture
3 00 °C fo r 10 se co nd s
O pe ratin g case te m p era ture
-5 5°C to + 12 5°C
S tora ge ca se tem pe ratu re
-6 5°C to + 13 5°C
Table V. Electrical Performance Characteristics
Test
Symbol
Conditions
Group A
Device
-55°C ≤ Tc ≤ +125°C
Vin = 28Vdc ±5%, CL = 0
Subgroups
Types
Unless otherwise specified
VOUT
Output voltage
1, 2
IOUT
Output current
3
Output ripple voltage
VRIP
IOUT = 0
VIN = 16, 28, and 40Vdc
each output
VIN = 16, 28, and 40Vdc,
B.W. = 20 Hz to 2MHz
1
2,3
01
Unit
Limits
Min
Max
±4.95
±5.05
±4.90
±5.10
0.12
1.08
A
V
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
VIN = 16, 28, and 40Vdc,
4
VRLINE Iout = 0%, 50% and 100%
Line regulation
rated load
VIN = 16, 28, and 40Vdc,
4
VRLOAD IOUT = 0%, 50% and 100%
Load regulation
rated load
Cross regulation
5
VRCROSS 10% to 90% load changes
IOUT = 0, inhibit (pin 1)
IIN
Input current
tied to input return (pin 7)
IOUT = 0,
12
mA
60
inhibit (pin 1) = open
3, 4
Input ripple current
Efficiency
4
IRIP
EFF
Isolation
ISO
IOUT = 100% rated load
B.W. = 20 Hz to 2.0MHz
IOUT = 100% rated load,
1,2,3
1,3
01
01
Tc = +25°C,
Input to output or any pin
2
to case (except pin 6)
1
01
4
01
1,2,3
01
4,5,6
01
50
75
mA p-p
%
72
100
MΩ
at 500Vdc, Tc = +25°C
No effect on dc performance,
6, 7
Capacitive load
CL
Tc = +25°C,
200
µF
total for both outputs
Power dissipation
load fault
Switching frequency
PD
FS
Overload, Tc = +25°C
Short circuit, Tc = +25°C
IOUT = 100% rated load
6.0
2.0
500
600
W
KHz
For Notes to Specifications, refer to page 11
10
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AHF28XX Series
AHF2805D
Table V. Electrical Performance Characteristics - continued
Test
Symbol
Conditions
Group A
Device
-55°C ≤ Tc ≤ +125°C
Vin = 28Vdc ±5%, CL = 0
Subgroups
Types
Unless otherwise specified
Output response to
step transient load
4, 9
changes
Recovery time step
transient load
4, 9,10
changes
Output response to
transient step line
4, 7, 11
changes
Recovery time
transient step line
4, 7, 10, 11
changes
Turn on overshoot
Turn on delay
50% to/from 100%
VOTLOAD
TTLOAD
0% to/from 50%
4,5,6
50% to/from 100% rated load
Min
Max
-400
+400
-800
+800
mVpk
70
4,5,6
µs
01
0% to/from 50% rated load
100
4,5,6
Input step 16V to/from
VOTLINE 40Vdc, IOUT = 100%
4,5,6
01
4,5,6
-400
+400
mVpk
01
1200
µs
rated load
Input step 16V to/from
40Vdc, IOUT = 100%
rated load
VTonOS IOUT = o and 100% rated load
Load fault
recovery
Weight
Unit
01
rated load
TTLINE
4
4,5,6
rated load
Limits
4, 9
TonD
TrLF
IOUT = o and 100% rated load
9
4,5,6
01
600
mVpk
4,5,6
01
25
ms
4,5,6
01
25
ms
38
g
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 20KHz to 2.0MHz.
4. Load current split equally between +V OUT and –VOUT.
5. 1.2 watt load on output under test, 1.2W to 10.8W 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 2.0µs and 10µs.
10. Recovery time is measured from the initiation of the transient to where V OUT has returned to within ±1.0
percent of VOUT at 50 percent load.
11. Input step transition time between 2.0µs and 10µs.
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
AHF2812D
Absolute Maximum Ratings
Input voltage
-0.5V to +50V
Soldering temperature
300°C for 10 seconds
Operating case temperature
-55°C to +125°C
Storage case temperature
-65°C to +135°C
Table VI. Electrical Performance Characteristics
Test
Symbol
Conditions
Group A
Device
-55°C ≤ Tc ≤ +125°C
Vin = 28Vdc ±5%, CL = 0
Subgroups
Types
Unless otherwise specified
VOUT
Output voltage
Output current
1, 2
IOUT
Output ripple voltage
3
VRIP
IOUT = 0
VIN = 16, 28, and 40Vdc
each output
VIN = 16, 28, and 40Vdc,
B.W. = 20 Hz to 2MHz
1
2,3
01
Unit
Limits
Min
Max
±11.88
±12.12
±11.76
±12.24
100
900
mA
V
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
VIN = 16, 28, and 40Vdc,
Line regulation
4
VRLINE Iout = 0%, 50% and 100%
rated load
VIN = 16, 28, and 40Vdc,
Load regulation
4
VRLOAD IOUT = 0%, 50% and 100%
rated load
5
VRCROSS 10% to 90% load changes
IOUT = 0, inhibit (pin 1)
Cross regulation
IIN
Input current
tied to input return (pin 7)
IOUT = 0,
12
mA
60
inhibit (pin 1) = open
Input ripple current
Efficiency
3, 4
4
IRIP
EFF
Isolation
ISO
IOUT = 100% rated load
B.W. = 20 Hz to 2.0MHz
IOUT = 100% rated load,
1,2,3
1,3
01
01
Tc = +25°C
Input to output or any pin
2
to case (except pin 6)
1
01
4
01
1,2,3
01
4,5,6
01
50
77
mA p-p
%
74
100
MΩ
at 500Vdc, Tc = +25°C
No effect on dc performance,
Capacitive load
6, 7
CL
Tc = +25°C,
200
µF
total for both outputs
Power dissipation
load fault
Switching frequency
PD
FS
Overload, Tc = +25°C
Short circuit, Tc = +25°C
IOUT = 100% rated load
6.0
2.0
500
600
W
KHz
For Notes to Specifications, refer to page 13
12
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AHF28XX Series
AHF2812D
Table VI. Electrical Performance Characteristics - continued
Test
Symbol
Conditions
Group A
Device
-55°C ≤ Tc ≤ +125°C
Vin = 28Vdc ±5%, CL = 0
Subgroups
Types
Unless otherwise specified
Output response to
step transient load
4, 9
changes
Recovery time step
transient load
4, 9,10
changes
Output response to
transient step line
4, 7, 11
changes
50% to/from 100%
VOTLOAD
TTLOAD
4,5,6
50% to/from 100% rated load
Min
Max
-200
+200
-800
+800
mVpk
70
4,5,6
µs
01
4,5,6
Input step 16V to/from
VOTLINE 40Vdc, IOUT = 100%
1000
4,5,6
01
4,5,6
-750
+750
mVpk
01
1200
µs
rated load
Input step 16V to/from
40Vdc, IOUT = 100%
VTonOS
rated load
IOUT = o and 100% rated load
TonD
IOUT = o and 100% rated load
Load fault
recovery
Weight
0% to/from 50%
0% to/from 50% rated load
TTLINE
4
Unit
01
rated load
Recovery time
transient step line
4, 7, 10, 11
changes
Turn on overshoot
Turn on delay
4,5,6
rated load
Limits
4, 9
TrLF
9
4,5,6
01
600
mVpk
4,5,6
01
25
ms
4,5,6
01
25
ms
38
g
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 20KHz to 2.0MHz.
Load current split equally between +VOUT and –V OUT.
1.2 watt load on output under test, 1.2W to 10.8W 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 2.0µs and 10µs.
10. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1.0
percent of VOUT at 50 percent load.
11. Input step transition time between 2.0µs and 10µs.
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
13
AHF28XX Series
AHF2815D
Specifications
Absolute Maximum Ratings
Input voltage
-0.5V to +50V
Soldering temperature
300°C for 10 seconds
Operating case temperature
-55°C to +125°C
Storage case temperature
-65°C to +135°C
Table VII. Electrical Performance Characteristics
Test
Symbol
Conditions
Group A
Device
-55°C ≤ Tc ≤ +125°C
Vin = 28Vdc ±5%, CL = 0
Subgroups
Types
Unless otherwise specified
VOUT
Output voltage
1, 2
IOUT
Output current
3
Output ripple voltage
VRIP
IOUT = 0
VIN = 16, 28, and 40Vdc
each output
VIN = 16, 28, and 40Vdc,
B.W. = 20 Hz to 2MHz
1
2,3
01
Unit
Limits
Min
Max
±14.85
±15.15
±14.70
±15.30
80
720
mA
V
1,2,3
01
1,2,3
01
60
mV p-p
1,2,3
01
35
mV
1,2,3
01
35
mV
1,2,3
01
3.0
%
1,2,3
01
VIN = 16, 28, and 40Vdc,
4
VRLINE
Line regulation
Iout = 0%, 50% and 100%
rated load
VIN = 16, 28, and 40Vdc,
4
VRLOAD IOUT = 0%, 50% and 100%
Load regulation
rated load
Cross regulation
5
VRCROSS 10% to 90% load changes
IOUT = 0, inhibit (pin 1)
IIN
Input current
tied to input return (pin 7)
IOUT = 0,
12
mA
55
inhibit (pin 1) = open
3, 4
Input ripple current
Efficiency
4
IRIP
EFF
Isolation
ISO
IOUT = 100% rated load
B.W. = 20 Hz to 2.0MHz
IOUT = 100% rated load,
1,2,3
1,3
01
01
Tc = +25°C
Input to output or any pin
2
to case (except pin 6)
1
01
4
01
1,2,3
01
4,5,6
01
50
78
mA p-p
%
75
100
MΩ
at 500Vdc, Tc = +25°C
No effect on dc performance,
6, 7
CL
Capacitive load
Tc = +25°C,
200
µF
total for both outputs
Power dissipation
PD
load fault
Switching frequency
4
FS
Overload, Tc = +25°C
Short circuit, Tc = +25°C
IOUT = 100% rated load
6.0
2.5
500
600
W
KHz
For Notes to Specifications, refer to page 15
14
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AHF28XX Series
Table VII. Electrical Performance Characteristics - continued
Test
Symbol
Conditions
Group A
Device
-55°C ≤ Tc ≤ +125°C
Vin = 28Vdc ±5%, CL = 0
Subgroups
Types
Unless otherwise specified
Output response to
step transient load
4, 9
changes
Recovery time step
transient load
4, 9,10
changes
Output response to
transient step line
4, 7, 11
changes
50% to/from 100%
VOTLOAD
TTLOAD
4
Limits
Unit
Min
Max
-200
+200
-800
+800
mVpk
01
0% to/from 50%
4,5,6
rated load
50% to/from 100% rated load
70
4,5,6
µs
01
500
4,5,6
0% to/from 50% rated load
Input step 16V to/from
VOTLINE 40Vdc, IOUT = 100%
4,5,6
01
4,5,6
-750
+750
mVpk
01
1200
µs
4,5,6
01
750
mVpk
4,5,6
01
25
ms
4,5,6
01
25
ms
38
g
rated load
TTLINE
Input step 16V to/from
40Vdc, IOUT = 100%
VTonOS
rated load
IOUT = o and 100% rated load
Recovery time
transient step line
4, 7, 10, 11
changes
Turn on overshoot
Turn on delay
4,5,6
rated load
AHF2815D
Load fault
4, 9
recovery
Weight
TonD
TrLF
9
IOUT = o and 100% rated load
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 20KHz to 2.0MHz.
Load current split equally between +VOUT and –V OUT.
1.2 watt load on output under test, 1.2W to 10.8W 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 2.0µs and 10µs.
10. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1.0
percent of VOUT at 50 percent load.
11. Input step transition time between 2.0µs and 10µs.
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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15
AHF28XX Series
Application Information
Inhibit Function (Enable)
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 400µA of current. The open
circuit voltage of the enable input is 15 ± 1.0VDC. 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
A HEAT SINK =
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)
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:
⎡ ∆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:
⎡
⎤
50
Α HEATSINK = ⎢
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
Standard Microcircuit Drawing Equivalence Table
Standard Microcircuit
Drawing Number
5962-91600
5962-94568
5962-94563
5962-05205
5962-92111
5962-92351
16
Vendor Cage
Code
52467
52467
52467
52467
52467
52467
IR Standard
Part Number
AHF2805S
AHF2812S
AHF2815S
AHF2805D
AHF2812D
AHF2815D
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AHF28XX Series
( Single Output ) Block Diagram
EMI
Filter
8
+Input
Under-Voltage
Detector
Primary
Housekeeping
Supply
1
4
+Vout
3
Output
Return
2
+Vout
Enable Input
6
Drive
Case
Pulse Width
FB
Modulator
CS
Error
Amp &
Ref
Input Return
7
( Dual Output ) Block Diagram
EMI
Filter
8
+Input
Under-Voltage
Detector
1
Enable Input
6
Case
Primary
Housekeeping
Supply
3
Output
Return
4
-Vout
Drive
Pulse Width
FB
Modulator
CS
Error
Amp &
Ref
Input Return
7
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17
AHF28XX Series
Mechanical Outlines
Non-Flanged
0.205
(5.21)
0.030 dia., 8 pins
(0.760)
8
1
0.905
(22.99)
2
7
0.505
(12.83)
1.105
(28.07)
3
1.450
(36.83)
4
6
0.705
(17.91)
5
0.800
(20.32)
0.090 R Typ
(2.290)
1.120
(28.45)
0.260
(6.600)
0.330
(8.380)
MAX
Flanged
Pin Designation
18
Pin #
Single Output
Dual Output
1
Enable Input
Enable Input
2
NC
+ Output
3
Output Return
Output Return
4
+ Output
- Output
5
NC
NC
6
Case
Case
7
Input Return
Input Return
8
+Input
+Input
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AHF28XX Series
Device Screening
Requirement
MIL-STD-883 Method
Temperature Range
Element Evaluation
Non-Destructive
Bond Pull
Internal Visual
No Suffix
ES
d
-20°C to +85°C -55°C to +125°C
HB
e -55°C to +125°C
CH
-55°C to +125°C
MIL-PRF-38534
N/A
N/A
N/A
Class H
2023
N/A
N/A
N/A
N/A
2017
c
Yes
Yes
Yes
Temperature Cycle
1010
N/A
Cond B
Cond C
Cond C
Constant Acceleration
2001, Y1 Axis
N/A
500 Gs
3000 Gs
3000 Gs
PIND
2020
N/A
N/A
N/A
N/A
48 hrs@hi temp
Burn-In
1015
N/A
Final Electrical
MIL-PRF-38534
25°C
25°C
d
160 hrs@125°C 160 hrs@125°C
-55°C, +25°C,
-55°C, +25°C,
( Group A )
& Specification
+125°C
+125°C
PDA
MIL-PRF-38534
N/A
N/A
N/A
10%
Seal, Fine and Gross
1014
Cond A
Cond A, C
Cond A, C
Cond A, C
Radiographic
2012
N/A
External Visual
2009
c
N/A
N/A
N/A
Yes
Yes
Yes
Notes:
 Best commercial practice
‚ Sample tests at low and high temperatures
ƒ -55°C to +105°C for AHE, ATO, ATW
Part Numbering
AHF 28 05 S F /CH
Model
Input Voltage
Nominal
28 = 28V
Output Voltage
Single – 03R3 = 3.3V
05 = 5V
12 =12V
15 =15V
Dual – 05 = ±5V
12 = ±12V
15 = ±15V
Screening Level
(Please refer to Screening Table)
No Suffix, ES, HB, CH
Package Style
F = Flange
Blank = Non-Flanged
Output
S = Single
D = Dual
WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 252-7105
IR SAN JOSE: 2520Junction Avenue, San Jose, California 95134, Tel: (408) 434-5000
Visit us at www.irf.com for sales contact information.
Data and specifications subject to change without notice. 03/2010
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19