IRF ASA2805S-HB

PD - 94539
ASA28XXS SERIES
28V Input, Single Output
ADVANCED ANALOG
HIGH RELIABILITY
HYBRID DC/DC CONVERTERS
Description
The ASA28XXS Series of DC/DC converters are high
reliability thick film hybrid converters that use flyback
topology operating at a nominal frequency of 550Khz.
High input to output isolation is achieved through the
use of transformers in the flyback power and feedback
circuits.
The advanced feedback design provides fast loop response for superior line and load transient characteristics and offers greater reliability than devices incorporating optical feedback circuits.
This device is designed to meet MIL-STD-704D input
requirements offering full performance over a 16 to 40
volt input range. Output Power of up to 5 watts is available.
Connecting the inhibit pin (pin 5) to the input common
(pin 7) will cause the converter to shut down. It is recommended that the inhibit pin be driven by an open
collector device capable of sinking at least 400µA. The
open circuit voltage of the inhibit pin is 11.5 ±0.5 volts.
These converters are manufactured in a facility fully
qualified to MIL-PRF-38534. All processes used to
manufacture these converters have been qualified
thereby enabling Advanced Analog to deliver fully compliant devices. Three standard temperature grades are
offered with the screening options. Refer to Screening
Level section. The CH grade converters are fully compliant to MIL-PRF-38534 for class H. The HB grade
converters are processed with the same screening as
the CH grade, but do not have class H element evaluation as required by MIL-PRF-38534. These two grades
are fully tested and operate over the full military temperature range without derating of output power. A
commercial grade is also available. Variations in electrical, mechanical and screening requirements can be
accommodated. Extensive computer simulation using
www.irf.com
ASA
Features
n
n
n
n
n
n
n
n
n
n
n
n
Up To 5 Watt Output Power
5, 12,15 Volt Outputs
High Reliability
Wide Input Voltage Range -16 To 40 Volts
Indefinite Short Circuit and Overload
Protection
Popular Industry Standard Pin-Out
Military Screening Available
Parallel Seam Welded Package
No External Capacitors Required
Input Voltage Surge Protected to
MIL-STD-704A
Under Voltage Lockout
Available as Standard Military Drawing
complex modeling allows design modifications
to be examined. Contact Advanced Analog with
specific requirements.
1
09/11/02
ASA28XXS Series
Specifications
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Power Output
Soldering
Temperature Range
Conditions
-55° ≤ TC ≤+125°C
VIN = 28V dc ±5% CL = 0
unless otherwise specified
TEST
Output voltage
Output current
-0.5 V to 50 V Continuous. 80 V, 100 mSec
Internally limited (6.5 W typical)
300°C for 10 Sec.
Operating -55°C to +125°C Case
Storage
-65°C to +150°C
IOUT = 0
1
2
Output ripple voltage
Line regulation
Load regulation
ASA2812S/xx
ASA2815S/xx
Min
Max
Min
Max
Min
Max
1
4.95
5.05
11.88
12.12
14.85
15.15
2, 3
4.90
5.10
11.76
12.24
14.70
15.30
2
Efficiency
1, 2, 3
1000
417
333
mA
1
190
200
200
mV PP
2, 3
475
290
290
VIN = 16, 28, and 40 V dc
IOUT = 0, 50%, 100% IMAX
1
25
±25
±25
2, 3
50
±50
±50
VIN = 16, 28, and 40 V dc
IOUT = 0, 50%, 100% IMAX
1
25
±25
±25
2, 3
50
±50
±50
IOUT = IMAX
1, 2, 3
1, 2, 3
1
IOUT = IMAX
18
18
18
50
50
50
100
100
100
66
2, 3
Isolation - Input to
output or any pin to
case
3, 4
Capacitive load
Power dissipation, load
fault
Switching frequency
4
Output response to step
transient load changes
VTEST 500 Vdc, Tc= +25°C
1
No effect on dc
performance, Tc = +25°C
4
Overload
5
100
1, 2, 3
Short circuit
IOUT = IMAX
½ IMAX ó IMAX
71
71
68
68
100
100
200
200
4.0
4.0
4.0
2.0
2.0
2.0
500
600
4
-300
+300
5, 6
-450
+450
0 mA ó IMAX
4
-500
+500
5, 6
-750
+700
500
600
500
600
-450
+450
-400
+450
-750
+750
-800
+750
µf
W
KHz
mV pk
100
100
µS
1
1
ms
4, 5, 6
500
1000
1000
mV pk
Input step 16 ó 40 V dc
IOUT = IMAX
4, 5, 6
800
800
800
µS
IOUT = 0 mA, IMAX
4, 5, 6
600
600
600
mV pk
IOUT = 0 or IMAX
4, 5, 6
20
25
25
ms
4, 5, 6
20
25
25
ms
Output response
transient step line
4 8
changes
Input step 16 ó 40 V dc
IOUT = IMAX
Recovery time transient
4, 7, 8
step line changes
Turn on overshoot
Load fault recovery
mA PP
1
4, 5, 6
Turn on delay
mA
200
IOUT = IMAX
0 mA ó ½ IMAX
9
mV
MΩ
500
4, 5, 6
mV
%
6
Recovery time, step
transient load changes
V
VIN = 16, 28 and 40 V dc
IOUT = 0 Pin5 open
Input ripple current
Unit
VIN = 16, 28, and 40 V dc
IOUT = 0 Pin 5 to Pin 7
Input current
ASA2805S/xx
Group A
Subgroups
4
For Notes to Specifications, refer to page 3
2
www.irf.com
ASA28XXS Series
Notes to Specifications
1.
2.
3.
4.
5.
6.
7.
8.
9.
Parameter guaranteed and measured during line and load regulation tests.
Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz.
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.
Parameter shall be tested as part of design characterization and after design or process changes.
An overload is that condition of load in excess of rated load but less than that necessary to trigger the short circuit protection
and is the condition of maximum power dissipation.
Load step transition time between 2 and 10 microseconds.
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.
Input step transition time between 2 and 10 microseconds.
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.
Available Screening Levels and Process Variations for ASA28XXS Series
Requirement
MIL-STD-883
Method
Temperature Range
No
Suffix
ES
Suffix
HB
Suffix
CH
Suffix
-20°C to +85°C
-55°C to +125°C
-55°C to +125°C
-55°C to +125°C
Element Evaluation
MIL-PRF-38534
ü
ü
ü
1010
Cond B
Cond C
Cond C
Constant Acceleration
2001,
500g
Cond A
Cond A
Burn-in
1015
48hrs @ 125°C
160hrs @ 125°C
160hrs @ 125°C
Internal Visual
2017
Temperature Cycle
Final Electrical (Group A)
¬
48hrs @ 85°C
MIL-PRF-38534
25°C
25°C
-55, +25, +125°C
-55, +25, +125°C
Seal, Fine & Gross
1014
Cond C
Cond A, C
Cond A, C
Cond A, C
External Visual
2009
¬
ü
ü
ü
* per Commercial Standards
Available Standard Military Drawing (SMD) Cross Reference
ASA2805S/CH
5962-9462901
ASA2812S/CH
5962-9463101
ASA2815S/CH
5962-9463001
Part Numbering
ASA 28 05 S / CH
Model
Input Voltage
Screening
–
, ES, HB, CH
28 = 28V
Output Voltage
5 = ±5, 12 = ±12,
15 = ±15
www.irf.com
Outputs
S = Single
D = Dual
3
ASA28XXS Series
ASA28XXS Block Diagram
1
6
+Input
+Output
Return
2
Error
Amplifier
Return
7
Case
8
Enable
5
Controller
ASA28XXS Case Outline
Pin No.
1.075
0.800
1
2
3
0.270
4
5
1.075
8
ASA28XXS Pin Designation
7
6
0.025 ± .003 Dia Pins
0.800
±.005
Designation
1
Positive Output
2
Output Return
3
N/C
4
N/C
5
Enable
6
Positive Input
7
Input Return
8
Case
0.220
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. 09/02
4
www.irf.com