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PD - 94541
AHF28XX SERIES 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 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.
28V Input, Single and Dual Output
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 -55C to +125C 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.
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1
10/08/02
AHF28XX Series
Specifications
n ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300C for 10 seconds Operating -55C to +125C Storage -65C to +135C
AHF2805S
Table I. Electrical Performance Characteristics
Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 Unless otherwise specified IOUT = 0 VIN = 16, 28, and 40 V dc VIN = 16, 28, and 40 V dc, B.W. = 20 Hz to 2MHz VIN = 16, 28, and 40 V dc, Iout = 0, 500, and 1000 mA VIN = 16, 28, and 40 V dc, IOUT = 0, 500, and 1000 mA IOUT = 0, inhibit (pin 1) tied to input return (pin 7) IOUT = 0, inhibit (pin 1) = open IOUT = 1000mA B.W. = 20 Hz to 2MHz IOUT = 1000mA Input to output or any pin To case (except pin 6) at 500V dc Tc = +25C No effect on dc performance, Tc = +25C Limits Group A Subgroups Device Types Unit Min Max
Test
Symbol
Output voltage
VOUT IOUT VRIP VRLINE VRLOAD IIN
1 2,3 1,2,3 1,2,3
01
4.95 4.90
5.05 5.10 2400 60
V
Output current1 Output ripple voltage2 Line regulation
01 01
mA mV p-p
1,2,3
01
25
mV
Load regulation
1,2,3
01
50
mV
Input current
1,2,3
01
12 mA 30
Input ripple current2
IRIP EFF ISO
1,2,3
01
50
mA p-p
Efficiency
1 2,3 1
01
76 74 100
%
Isolation
01
M
Capacitive load3,4
CL
4
01
500
F
Power dissipation load fault Switching frequency
PD
Overload 5 Short circuit IOUT = 1000mA
1 1,2,3 4,5,6
01 01 01 500
6 2 600
W
FS
kHz
For Notes to Specifications, refer to page 3
2
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AHF28XX Series
Table I. Electrical Performance Characteristics - continued
Test Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 unless otherwise specified 1200 mA to/from 2400mA Limits Group A Subgroups Device Types
AHF2805S
Unit Min Max
Output response to step transient load changes6
VOTLOAD
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 Input step 16 V to/from 40 V dc, IOUT = 2400mA 4, 8 Input step 16 V to/from 40Vdc IOUT = 2400mA 4, 7, 8 IOUT = 0 and 2400mA IOUT = 0 and 2400mA
9
4,5,6 4,5,6 4,5,6 4,5,6
01
70 1200 8 500
s ms ms mV pk
Output response to transient step line changes Recovery time transient step line changes Turn on overshoot Turn on delay
VOTLINE
01
TTLINE
4,5,6
01
800
s
VTonOS TonD TrLF
4,5,6 4,5,6
01 01
600 20
mV pk ms
Load fault recovery4,9 Weight
4,5,6
01
20
ms
35
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 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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AHF28XX Series
Specifications
n ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300C for 10 seconds Operating -55C to +125C Storage -65C to +135C
AHF2812S
Table II. Electrical Performance Characteristics
Test Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 Unless otherwise specified IOUT = 0 Group A Subgroups Device Types Limits Min 1 2,3 1,2,3 1,2,3 01 11.88 11.76 Max 12.12 12.24 1000 60 V Unit
Output voltage
VOUT
Output current1 Output ripple voltage2 Line regulation
IOUT VRIP VRLINE VRLOAD IIN
VIN = 16, 28, and 40 V dc VIN = 16, 28, and 40 V dc, B.W. = 20 Hz to 2MHz VIN = 16, 28, and 40 V dc, Iout = 0, 500, and 1000 mA VIN = 16, 28, and 40 V dc, IOUT = 0, 500, and 1000 mA IOUT = 0, inhibit (pin 1) tied to input return (pin 7) IOUT = 0, inhibit (pin 1) = open IOUT = 1000mA B.W. = 20 Hz to 2MHz IOUT = 1000mA
01 01
mA mV p-p
1,2,3
01
50
mV
Load regulation
1,2,3
01
50
mV
Input current
1,2,3
01
12 mA 50
Input ripple current2
IRIP
1,2,3
01
50
mA p-p
Efficiency
EFF
1 2,3 1
01
78 75 100
%
Isolation
ISO
Input to output or any pin to case (except pin 6) at 500V dc Tc = +25C No effect on dc performance, Tc = +25C Overload 5 Short circuit
01
M
Capacitive load3,4
CL PD
4
01
500
F
Power dissipation load fault
1 1,2,3
01 01
6 2
W
Switching frequency
FS
IOUT = 1000mA
4,5,6
01
500
600
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 -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 unless otherwise specified 50 mA to/from 1000mA 0 mA to/from 500mA Group A Subgroups Device Types Min Limits Max
AHF2812S
Unit
Output response to step transient load changes6
VOTLOAD
4 5,6 4 5,6 4,5,6 4,5,6 4,5,6 4,5,6
01
-300 -450 -500 -750
+300 +450 +500 +750 100 1500 10
mV pk
Recovery time step transient load changes6,7
TTLOAD
50 mA to/from 1000mA 0 mA to 500 mA 500 mA to 0 mA
01
s
ms mV pk
Output response to transient step line changes Recovery time transient step line changes Turn on overshoot Turn on delay
VOTLINE
Input step 16 V to/from 40 V dc, IOUT =1000mA 4, 8 Input step 16 V to/from 40Vdc IOUT =1000mA 4, 7, 8 IOUT = 0 and 1000mA IOUT = 0 and 1000mA 9
01
1500
TTLINE
4,5,6
01
800
s
VTonOS TonD TrLF
4,5,6
01
600
mV pk
4,5,6
01
20
ms
Load fault recovery4,9 Weight
4,5,6
01
20
ms
35
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 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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AHF28XX Series
Specifications
n ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300C for 10 seconds Operating -55C to +125C Storage -65C to +135C
AHF2815S
Table III. Electrical Performance Characteristics
Test Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 unless otherwise specified IOUT = 0 Group A Subgroups Device Types Limits Min Max Unit
Output voltage
VOUT
1 2,3 1,2,3 1,2,3
All
14.85 14.70
15.15 15.30 2000 50
V
Output current1 Output ripple voltage2 Line regulation
IOUT VRIP VRLINE
VIN = 18, 28, and 40 V dc VIN = 18, 28, and 40 V dc, B.W. = 20 Hz to 2 MHz VIN = 18, 28, and 40 V dc, Iout = 0, 1000, and 2000 mA
All All
mA mV p-p
1 2,3 1,2,3
All
35 75 150
mV
Load regulation
VRLOAD IIN
VIN = 18, 28, and 40 V dc, IOUT = 0, 1000, and 2000 mA IOUT = 0, inhibit (pin 2) tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open IOUT = 2000mA, B.W. = 20 Hz to 2 MHz IOUT = 2000mA
All
mV
Input current
1,2,3
All
18 50
mA
Input ripple current2
IRIP EFF
1,2,3
All
20
mA p-p
Efficiency
1 2,3 1
All
80 77 100
%
Isolation
ISO
Input to output or any pin to case (except pin 7) at 500 V dc Tc = +25C No effect on dc performance, Tc = +25C Overload 5 Short circuit
All
M
Capacitive load3,4
CL PD
4
All
200
F
Power dissipation load fault
1 1,2,3
All All
6 2
W
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 Table III. Electrical Performance Characteristics - continued
Test Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 unless otherwise specified 1000 mA to/from 2000mA 0 mA to/from 1000mA TTLOAD 1000 mA to/from 2000mA 0 mA to/from 1000 mA Group A Subgroups Device Types Min Limits Max
AHF2815S
Unit
Output response to step transient load Changes
6
VOTLOAD
4,5,6 4,5,6 4 5,6 4 5,6
All
-800 -1000
+800 +750 100 200
mV pk
Recovery time step transient load Changes6,7
All
s ms
All
5 10
Output response to transient step line changes Recovery time transient step line changes Turn on overshoot Turn on delay VTonOS TonD TrLF TTLINE Input step 18 V to/from 40Vdc IOUT = 2000mA 4, 7, 8 IOUT = 0 and 2000mA IOUT = 0 and 2000mA 9 4,5,6 4,5,6 4,5,6 VOTLINE Input step 18 V to/from 40 V dc, IOUT = 2000mA 4, 8 4,5,6
04 -1000 05 06 04 500 05 06 All All 750 12 mV pk ms s +1000 mV pk
Load fault recovery4,9 Weight
4,5,6
All
12
ms
38
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 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 ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300C for 10 seconds Operating -55C to +125C Storage -65C to +135C
AHF2805D
Table IV. Electrical Performance Characteristics
Test Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 unless otherwise specified IOUT = 0 VIN = 16, 28, and 40 V dc, IOUT Output ripple voltage3 Line regulation4 Load regulation4 Cross regulation5 VRIP VRLINE VRLOAD VRcros each output VIN = 16, 28, and 40 V dc, B.W. = 20 Hz to 2 MHz VIN = 16, 28, and 40 V dc, Iout = 0, 1200, and 2400 mA VIN = 16, 28, and 40 V dc, IOUT = 0, 1200, and 2400 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 current3,4 Efficiency
4
Group A Subgroups
Device Types Min
Limits Max 5.05 5.10
Unit
Output voltage
VOUT
1 2,3
01
4.95 4.90
V
Output current1,2
1,2,3
01
0.12
1.08
A
1,2,3
01
60
mV p-p
1,2,3
01
30
mV
1,2,3
01
30 10
mV
1,2,3
01
%
1,2,3
01
12 60
mA
IRIP EFF
IOUT = 2400mA B.W. = 20 Hz to 2 MHz IOUT = 2400mA, TC =+25C Input to output or any pin 1,2,3 1,3 2 01 01 75 72 % 50 mA p-p
Isolation
ISO
to case (except pin 6) at 500V dc, TC = +25C No effect on dc
1
01
100
M
Capacitive load
6,7
CL
performance, TC = +25C, total for both outputs
4
01
200
F
For Notes to Specifications, refer to page 9
8
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AHF28XX Series Table IV. Electrical Performance Characteristics - continued
Test Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 unless otherwise specified Overload, TC = +25C 8 Short circuit, TC = +25C FS VOTLOAD 0 mA to/from 1200 mA 1200 mA to/from 2400mA TTLOAD 0 mA to/from 1200 mA VOTLINE Input step from/to 16 to 40 V dc, IOUT =2400mA 4,5,6 4,5,6 01 -400 100 +400 mV pk 4,5,6 4,5,6 01 IOUT = 2400mA 1200 mA to/from 2400mA 4,5,6 4,5,6 01 01 500 -400 -800 Group A Subgroups Device Types Min 1,2,3 01 Limits Max 6 2 600 +400 +800 70 s W kHz mV pk
AHF2805D
Unit
Power dissipation load fault Switching frequency4 Output response to step transient load changes4,9 Recovery time step transient load changes4,9,10 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 Weight
PD
TTLINE
Input step from/to 16 to 40 V dc, IOUT =2400mA IOUT =0 and 2400mA
4,5,6
01
1200
s
4,5,6 4,5,6
01 01
600 25
mV pk ms
VTonOS TonD TrLF
IOUT = 0 and 2400mA
4,5,6
01
25 38
ms 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 ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300C for 10 seconds Operating -55C to +125C Storage -65C to +135C
AHF2812D
Table V. Electrical Performance Characteristics
Test Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 unless otherwise specified IOUT = 0 VIN = 16, 28, and 40 V dc, IOUT Output ripple voltage3 Line regulation4 Load regulation4 Cross regulation5 VRIP VRLINE VRLOAD VRcros IIN each output VIN = 16, 28, and 40 V dc, B.W. = 20 Hz to 2 MHz VIN = 16, 28, and 40 V dc, 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 tied to input return (pin 7) IOUT =0, inhibit (pin 1) = open Input ripple current3,4 Efficiency
4
Group A Subgroups
Device Types Min
Limits Max 12.12 12.24
Unit
Output voltage
VOUT
1 2,3
01
11.88 11.76
V
Output current1,2
1,2,3
01
100
900
mA
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 60
mA
IRIP EFF
IOUT = 1000mA B.W. = 20 Hz to 2 MHz IOUT = 1000mA, TC =+25C Input to output or any pin 1,2,3 1,3 2 01 01 77 74 % 50 mA p-p
Isolation
ISO
to case (except pin 6) at 500V dc, TC = +25C No effect on dc
1
01
100
M
Capacitive load6,7
CL
performance, TC = +25C, total for both outputs
4
01
200
F
For Notes to Specifications, refer to page 11
10
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AHF28XX Series Table V. Electrical Performance Characteristics - continued
Test Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 unless otherwise specified Overload, TC = +25C 8 Short circuit, TC = +25C FS VOTLOAD 0 mA to/from 500 mA 500 mA to/from 1000mA TTLOAD 0 mA to/from 500 mA VOTLINE Input step from/to 16 to 40 V dc, IOUT =1000mA 4,5,6 4,5,6 01 -750 1000 +750 mV pk 4,5,6 4,5,6 01 IOUT = 1000mA 500 mA to/from 1000mA 4,5,6 4,5,6 01 01 500 -200 -800 Group A Subgroups Device Types Min 1,2,3 01 Limits Max 6 2 600 +200 +800 70 s W kHz mV pk
AHF2812D
Unit
Power dissipation load fault Switching frequency4 Output response to step transient load changes4,9 Recovery time step transient load changes4,9,10 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 Weight
PD
TTLINE
Input step from/to 16 to 40 V dc, IOUT =1000mA IOUT =0 and 1000mA
4,5,6
01
1200
s
4,5,6 4,5,6
01 01
600 25
mV pk ms
VTonOS TonD TrLF
IOUT = 0 and 1000mA
4,5,6
01
25 38
ms 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 ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300C for 10 seconds Operating -55C to +125C Storage -65C to +135C
AHF2815D
Table VI. Electrical Performance Characteristics
Test Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 Unless otherwise specified IOUT = 0 Group A Subgroups Device Types Min 1 2,3 1,2,3 01 14.85 14.70 80 Limits Max 15.15 15.30 720 V Unit
Output voltage
VOUT
Output current1,2
IOUT VRIP VRLINE VRLOAD VRcros IIN
VIN = 16, 28, and 40 V dc, each output VIN = 16, 28, and 40 V dc, B.W. = 20 Hz to 2 MHz VIN = 16, 28, and 40 V dc, Iout = 0, 400, and 800 mA VIN = 16, 28, and 40 V dc, IOUT = 0, 400, and 800 mA 10 percent to 90 percent load change each output IOUT = 0, inhibit (pin 1) tied to input return (pin 7) IOUT = 0, inhibit (pin 1) = open IOUT = 800mA B.W. = 20 Hz to 2 MHz IOUT = 800mA Input to output or any pin to case (except pin 6) at 500 V dc, TC = +25C No effect on dc performance, TC = +25C, total for both outputs
01
mA
Output ripple voltage3 Line regulation4 Load regulation4 Cross regulation5
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
%
Input current
1,2,3
01
12 55
mA
Input ripple current3,4 Efficiency4
IRIP EFF
1,2,3
01
50
mA p-p
1,3 2 1
01
78 75 100
%
Isolation Capacitive load6,7
ISO
01
M
CL
4
01
200
F
For Notes to Specifications, refer to page 13
12
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AHF28XX Series Table VI. Electrical Performance Characteristics - continued
Test Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 Unless otherwise specified Overload Short circuit IOUT = 800 mA 400 mA to/from 800 mA 0 mA to/from 400 mA
8
AHF2815D
Limits Min Max 6 2 500 -200 -800 600 +200 +800 W Unit
Group A Subgroups
Device Types
Power dissipation load fault Switching frequency4 Output response to step transient load changes4,9 Recovery time step transient load changes4,9,10 Output response transient step line changes4,7,11
PD
1,2,3
01
FS VOTLOAD
4,5,6 4,5,6 4,5,6
01 01 01
kHz mV pk
TTLOAD
400 mA to/from 800 mA 0 mA to/from 400 mA Input step from/to 16 to 40 V dc, IOUT=800mA
4,5,6 4,5,6
01 01
70 500
s
VOTLINE
4,5,6
01
-750
+750
mV pk
Recovery time transient step line changes4,7,10,11 Turn on overshoot4 Turn on delay4,12 Load fault recovery7 Weight
TTLINE
Input step from/to 16 to 40Vdc, IOUT =800mA IOUT=0 and 800mA IOUT = 0 and 800mA
4,5,6
01
1200
s
VTonOS TonD TrLF
4,5,6 4,5,6 4,5,6
01 01 01
750 25 25 38
mV pk ms ms grams
Notes to Specifications
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. 1. 2. 3. 4. 5. 6.
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AHF28XX Series
AHF28XX ( Single Output ) Block Diagram
EMI F ilter
8 + Input U n der-V o ltag e D e tec tor
4 + V o ut
1 E n able 6 C a se
P rim a ry H o use kee ping S u pply
3
R e turn
D rive
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
8 +Input U nder-V oltage D etector
EMI Filter 2 +V out
3 R eturn P rim ary H ousekeeping S upply
1 E nable
4
-V out
6 C ase
D rive
P ulse W idth FB M odulator
CS
E rror Amp & R ef
Input R eturn 7
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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 A 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 = +25C, the DC/DC converter case temperature will be approximately 100C 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:
A
HEAT SINK
=
0.85 80
-1.43
- PKG
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:
As an example, if a maximum case temperature rise of 50C rise above ambient is desired, then the required effective heat sink area is:
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 = 74C
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15
AHF28XX Series
AHF28XX Case Outlines Non-Flanged
0 .0 3 0 d ia ., 8 p in s (0 .7 6 0 ) 0 .2 0 5 (5 .2 1 )
8
1 2
0 .9 0 5 (2 2 .9 9 ) 1 .1 0 5 (2 8 .0 7 ) 1 .4 5 0 (3 6 .8 3 ) 0 .7 0 5 (1 7 .9 1 )
0 .5 0 5 (1 2 .8 3 )
7
3 4
6
5
0 .8 0 0 (2 0 .3 2 ) 1 .1 2 0 (2 8 .4 5 )
0 .0 9 0 R T y p (2 .2 9 0 )
0 .2 6 0 (6 .6 0 0 ) 0 .3 3 0 (8 .3 8 0 ) MAX
Flanged
Pin Designation
AHF28XXS Pin No. 1 2 3 4 5 6 7 8 Designation Enable N/C Output Return + Output N/C Case Input Return + Input Pin No. 1 2 3 4 5 6 7 8 AHF28XXD Designation Enable + Output Output Return - Output N/C Case Input Return + Input
M od el Inpu t V oltage
28 = 28V
Part Numbering
AHF 28 05 S F / CH
S creening
-
, 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 utput V oltage
5 = 5 , 1 2 = 1 2 , 1 5 = 1 5
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 +85C ES Suffix -55C to +125C HB Suffix -55C to +125C CH Suffix -55C to +125C MIL-PRF-38534 2017 1010 2001 1015 MIL-PRF38534 1014 2009 48hrs @ 85C 25C Yes Cond B 500g 48hrs @ 125C 25C Yes Cond C Cond A 160hrs @ 125C -55, +25, +125C Yes Cond C Cond A 160hrs @ 125C -55, +25, +125C
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 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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