IRF ATW2812S/HB Advanced analog hybrid-high reliability dc/dc converter Datasheet

PD - 94557
ATW28XXD SERIES
28V Input, Dual Output
ADVANCED ANALOG
HYBRID-HIGH RELIABILITY
DC/DC CONVERTERS
Description
The ATW28XXD Series of DC/DC converters feature
high power density and an extended temperature range
for use in military and industrial applications. Designed
to MIL-STD-704 input requirements, these devices operate with a nominal 28 VDC inputs with ±12V and ±15V
dual outputs to satisfy a wide range of requirements.
The circuit design incorporates a pulse width modulated push-pull topology operating in the feed-forward
mode at a nominal switching frequency of 270KHz. Input
to output isolation is achieved through the use of transformers in the forward and feedback circuits.
The advanced feedback design provides fast loop response for superior line and load transient characteristics and offers greater reliability and radiation tolerance than devices incorporating optical elements in
the feedback circuits.
Three standard temperature grades are offered. Refer
to Part Number section for more severe environments.
Manufactured in a facility fully qualified to MIL-PRF38534, these converters are available in four screening grades to satisfy a wide range of requirements. The
CH grade is fully compliant to the requirements of MILPRF-38534 for class H. The HB grade is processed
and screened to the class H requirement, but may not
necessarily meet all of the other MIL-PRF-38534 requirements, e.g., element evaluation and Periodic Inspection (PI) not required. Both grades are tested to
meet the complete group “A” test specification over the
full military temperature range without output power
deration. Two grades with a more limited screening
are also available for use in less demanding applications. Variations in electrical, mechanical and screening can be accommodated. Contact Advanced Analog
for special requirements.
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ATW
Features
n 18 to 40 VDC Input Range (28 VDC Nominal)
n ±12V and ±15V Outputs Available
n Indefinite Short Circuit and Overload
Protection
3
n 22.8 W/in Power Density
n 30 W Output Power
n Fast Loop Response for Superior Transient
Characteristics
n Operating Temperature Range from -55°C to
+125°C Available
n Popular Industry Standard Pin-Out
n Resistance Seam Welded Case for Superior
Long Term Hermeticity
n Efficiencies up to 85%
n Shutdown from External Signal
n Full Military Screening
n 200,000 hour MTBF at 85°C
n MIL-PRF-38534 Compliant Versions
Available
1
10/24/02
ATW28XXD Series
Specifications
ATW2812D
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
Output voltage
Output current
1, 2
Output ripple voltage
Line regulation
3
4
VOUT
IOUT = 0
IOUT
VIN = 18, 28, and 40 V dc,
each output
VIN = 18, 28, and 40 V dc,
B.W. = 20Hz to 2MHz
VIN = 18, 28, and 40 V dc,
Iout = 0,1250, and 2500mA
VRIP
VRLINE
4
Conditions
-55°C ≤Tc ≤+125°C
Vin = 28 Vdc ±5%, CL = 0
Unless otherwise specified
VRLOAD
Group A
Subgroups
Device
Types
1
2,3
1,2,3
All
All
1,2,3
mA
All
85
mVp-p
1
All
30
mV
2,3
1,2,3
All
60
120
mV
1,2,3
1,2,3
All
All
3.5
18
%
mA
1,2,3
All
50
50
mAp-p
1
All
80
%
1
All
100
MΩ
4
All
200
µF
1
All
12
W
250
250
275
-400
-800
PD
FS
Short circuit, TC = +25°C
IOUT = 2500mA
4,5,6
Output response to step
transient load
4, 9
changes
VOTLOAD
1250mA to/from 2500mA
4,5,6
01
02
03
All
Recovery time step
transient load
4, 9, 10
changes
TTLOAD
0mA to/from 2500mA
1250mA to/from 2500mA
4,5,6
4,5,6
All
All
0mA to/from 1250mA
1250mA to/from 0mA
4,5,6
4,5,6
All
All
Cross regulation
Input current
5
Input ripple current
Efficiency
VRCROSS
IIN
3, 4
4
EFF
Isolation
Capacitive load
IRIP
ISO
6, 7
CL
Power dissipation
load fault
Switching frequency
4
Min
±11.88
±11.76
250
Unit
Max
±12.12
±12.24
2250
VIN = 18, 28, and 40 V dc,
IOUT = 0, 1250, and 2500mA
10% to 90% load change
IOUT = 0, inhibit (pin 8)
tied to input return (pin 10)
IOUT = 0,inhibit (pin 8)= open
IOUT = 2500mA
B.W. = 20Hz to 2MHz
IOUT = 2500mA
TC = +25°C
Input to output or any pin
to case (except pin 7) at
500 V dc Tc = +25°C
No effect on dc
performance, Tc = +25°C,
total for both outputs
8
Overload, TC = +25°C
Load regulation
Limits
V
9
300
270
300
+400
mV pk
+800
70
µs
500
5
ms
KHz
For Notes to Specifications, refer to page 3
2
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ATW28XXD Series
ATW2812D
Table I. Electrical Performance Characteristics - continued
Test
Output response
transient step line
4, 7, 11
changes
Recovery time
transient step line
4, 7, 10, 11
change
Turn on overshoot
4, 12
Turn on delay
4
Load fault recovery
Weight
Symbol
Conditions
-55°C ≤Tc ≤+125°C
Vin = 28 Vdc ±5%, CL = 0
unless otherwise specified
Group A
Subgroups
Device
Types
VOTLINE
Input step from/to 18 to 40
Vdc, IOUT = 2500mA
4,5,6
All
TTLINE
Input step from/to 18 to 40
Vdc, IOUT = 2500mA
4,5,6
IOUT = 0 and 2500mA
IOUT = 0 and 2500mA
VTonOS
TonD
7
TrLF
Limits
Unit
Min
Max
-800
+800
mV pk
All
4000
µs
4,5,6
4,5,6
All
All
750
14
mV pk
ms
4,5,6
All
14
75
ms
grams
Flange
Notes to Specifications
1
2
3
4
5
6
7
8
9
10
11
12
Parameter guaranteed by line, load and cross regulation tests.
Up to 90% of full power is available from either output provided the total output does not exceed 30W.
Bandwidth guaranteed by design. Tested for 20KHz to 2MHz.
Load current split equally between +VOUT and –VOUT.
Three-watt load on output under test, 3 watt to 27 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.
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.
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.
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
ground signal from the inhibit pin (pin 8) while power is applied to the input.
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3
ATW28XXD Series
Specifications
ATW2815D
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
Output voltage
VOUT
11, 13
Output current
8
Output ripple voltage
4, 11
Output Power
9, 10
Line regulation
9, 10
IOUT
VRIP
POUT
VRLINE
Conditions
-55°C ≤Tc ≤+125°C
Vin = 28 Vdc ±5%, CL = 0
Unless otherwise specified
VIN = 18, 28, and 40 Vdc
IOUT = 0
VIN = 18, 28, and 40 V dc
VIN = 18, 28, and 40 V dc,
B.W. = DC to MHz
VIN = 18, 28, 40 Vdc
VIN = 18, 28, and 40 V dc,
Iout = 0, 1000, and 2000mA
Power dissipation
load fault
PD
VIN = 18, 28, and 40 V dc,
IOUT = 0, 1000, and 2000mA
IOUT = 0, inhibit (pin 8)
IOUT = 0, inhibit (pin 8) = open
IOUT = 2000mA
IOUT = 2500mA TC = 25°C
Input to output or any pin
to case (except pin 8) at
500V dc Tc = 25°C
No effect on dc performance,
Tc = 25°C
3
Overload, TC = +25°C
Switching frequency
FS
Short circuit, TC = +25°C
IOUT = 2000mA
Load regulation
Input current
IIN
Input ripple current
Efficiency
Isolation
Capacitive load
VRLOAD
6, 12
Output response to step
transient
7, 9, 10
load changes
Recovery time step
1, 7
transient load changes
IRIP
EFF
ISO
CL
Group A
Subgroups
Device
Types
1
2,3
1,2,3
1,2,3
All
All
All
All
1,2,3
1
All
All
2,3
1,2,3
Limits
Max
±15.15
±15.30
2000
85
VDC
VDC
mADC
mVp-p
35
W
mV
All
All
75
150
mV
mV
1,2,3
1,2,3
1,2,3
1
1
All
All
All
All
All
12
30
60
mADC
mADC
mAp-p
%
MΩ
4
All
500
µF
1
All
9
W
All
01
02
03
All
9
263
245
265
+300
W
KHz
KHz
KHz
mV pk
-800
+800
25
mV pk
mV pk
µs
500
7
µs
ms
VOTLOAD
50% load to/from 100% load
1
1,2,3
1,2,3
1,2,3
4,5,6
TTLOAD
No load to 100% load
100% load to no load
50% load to/from 100% load
4,5,6
4,5,6
4,5,6
All
All
All
No load to 50% load
50% load to no load
4,5,6
4,5,6
All
All
Min
±14.85
±14.70
0.200
Unit
30
80
100
237
230
250
-300
-800
+800
For Notes to Specifications, refer to page 5
4
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ATW28XXD Series
Table II. Electrical Performance Characteristics - continued
Test
Symbol
ATW2815D
Group A
Subgroups
Device
Types
Input step from/to 18 to
40VDC
4,5,6
All
+180
mV pk
Input step from 40 to18 VDC
Input step from/to 18 to 40
VDC
4,5,6
4,5,6
All
All
-600
400
mV pk
µs
Input step from 40 to 18 VDC
IOUT = 0 and 2000mA
IOUT = 0 and 2000mA
4,5,6
4,5,6
4,5,6
All
All
All
400
750
12
µs
mV pk
ms
VIN = 18 to 40 VDC
Flange
4,5,6
All
12
75
ms
grams
Conditions
-55°C ≤Tc ≤+125°C
Vin = 28 Vdc ±5%, CL = 0
unless otherwise specified
Limits
Min
Output response
transient step line
5, 12
changes
VOTLINE
Recovery time
transient step line
1. 5, 12
changes
TTLINE
Turn on overshoot
2
Turn on delay
VTonOS
TonD
Load fault recovery
Weight
12
TrLF
Unit
Max
Notes to Specifications
1
2
3
4
5
6
7
8
9
10
11
12
13
Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1% of VOUT at 50% load.
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 8) while power is applied to the input.
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.
Above +125°C case, derate output power linearly to 0 at +135°C case.
Input step transition time between 2 and 10 microseconds.
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 will interfere with the operation of the load fault detection circuitry,
appearing as a short circuit during turn on.
Load step transition time between 2 and 10 microseconds.
Bandwidth guaranteed by design. Tested for 20KHz to 2MHz.
Load current split equally between +VOUT and –VOUT.
When operating with unbalanced loads, at least 25% of the load must be on the positive output to maintain regulation.
Parameter guaranteed by line and load regulation tests.
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.
Up to 90% of full power is available from either output provided the total output does not exceed 30 watts.
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5
ATW28XXD Series
ATW28XXD Block Diagram
3 + V out
1
+ In put
EMI
F ilter
4 R eturn
E nable
2
S ync
5 -V out
D rive 1
8
D rive 2
P u lse W idth
M odu lator
E rror A m p
& R eference
FB
In put
R eturn
10
Application Information
Inhibit Function
Connecting the inhibit input (Pin 8) to input common (Pin 10)
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 of current. The open circuit voltage of the inhibit input is 11.5 ±1 VDC.
EMI Filter
An optional external EMI filter (AFC461) is available that will
reduce the input ripple current to levels below the limits
imposed by MIL-STD-461B CEO3.
Device Synchronization
Whenever multiple DC/DC converters are utilized in a single
system, significant low frequency noise may be generated
due to the slight differences in the switching frequencies of
the converters (beat frequency noise). Because of the low
frequency nature of this noise (typically less than 10KHz), it
is difficult to filter out and may interfere with proper operation
of sensitive systems (communications, radar or telemetry).
Advanced Analog offers an option, which allows synchronization of multiple AHE/ATW type converters, thus eliminating this type of noise.
To take advantage of this capability, the system designer
must assign one of the converters as the master. Then, by
definition, the remaining converters become slaves and will
operate at the masters’ switching frequency.
The user should be aware that the synchronization system is fail-safe; that is, the slaves will continue operating
should the master frequency be interrupted for any reason. The layout must be such that the synchronization
output (pin 2) of the master device is connected to the
synchronization input (pin 2) of each slave device. It is
advisable to keep this run short to minimize the possibility of radiating the 250KHz switching frequency.
The appropriate parts must be ordered to utilize this feature. After selecting the converters required for the system, a ‘MSTR’ suffix is added for the master converter
part number and a ‘SLV’ suffix is added for slave part
number. See Part Number section.
Typical Synchronization Connection
+ In
R e turn
A F C 461
or
A F V 46 1
O u tp ut
+ In
C a se
R e turn
O u tp ut
A T W 28xxS
R e turn
R e turn
M STR
S ystem
B us
+ In
A T W 28xxD O u tp ut
or O ther R e turn
R e turn C om patab le O u tp ut
C a se
S LV
O u tp ut
+ In
C a se
A T W 28xxD
R e turn
O u tp ut
R e turn
S LV
6
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ATW28XXD Series
ATW28XXD Case Outlines
1.000
0.05
10
8
3
7
2
4
6
1
9
0.040 D X
0.26 L P ins
5
4 X 0.400
=1.600
1.95
2.700
M ax
2.360
0.500
M ax
1.350
M ax
Part Numbering
Pin Designation
ATW 28 15 D / CH - M STR
Pin No.
Designation
S yn c O p tio n
M od e l
1
Positive Input
2
N/C Standard or
Sync. ( Optional )
3
Positive Output
4
Output Return
5
Negative Output
6
N/C
7
Case Ground
8
Enable
Inhibit
9
N/C
10
Input Return
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M S T R = M a s te r
S L V = S la v e
O m it fo r S ta n d a rd
In pu t V o ltag e
2 8 = 2 8 V N o m in a l
O u tp ut V olta ge
S in g le - 05 , 1 2 , 1 5 V D C
D u a l - 1 2 = ±12 V , 1 5 = ±1 5 V
S cre e ning
–
, ES, HB, CH
O u tp uts
S = S ing le
D = Dual
7
ATW28XXD Series
Available Screening Levels and Process Variations for ATW28XXD 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
-55°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, Cond C
∗
Yes
Cond A
Yes
Yes
Yes
Yes
500g
5,000g
5,000g
48hrs @ 105°C
25°C
160hrs @ 125°C
-55, +25, +125°C
160hrs @ 125°C
-55, +25, +125°C
Yes
Yes
Yes
Yes
Yes
Yes
2001, Cond A
1015
MIL-PRF-38534
& Specification
1014
48hrs @ 85°C
25°C
2009
∗
* Per Commercial Standards
Available Standard Military Drawing (SMD) Cross Reference
Standardized
Military Drawing
Pin
5962-9210901HZX
5962-9210902HZX
5962-9210903HZX
5962-9161301HZX
5962-9161302HZX
5962-9161303HZX
Vendor
CAGE
Code
Number
52467
52467
52467
52467
52467
52467
Vendor
Similar
Pin
ATW2812D/CH
ATW2812D/CH-SLV
ATW2812D/CH-MSTR
ATW2815D/CH
ATW2815D/CH-SLV
ATW2815D/CH-MSTR
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
8
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