IRF ATW28XXS Hybrid-high reliability dc/dc converter Datasheet

PD-94556A
ATW28XXS SERIES
28V Input, Single Output
HYBRID-HIGH RELIABILITY
DC/DC CONVERTER
Description
The ATW28XXS 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 28VDC input and are available
with single outputs at 5V,12V and 15V. 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. These devices are provided in
a flanged package for secure mounting in severe
environments.
ATW
Features
n
n
n
n
n
n
n
n
n
n
n
n
n
19V to 40VDC Input Range (28VDC Nominal)
30W Output Power
Indefinite Short Circuit and Overload Protection
3
22.8W/in Power Density
Fast Loop Response for Superior Transient
Characteristics
Operating Temperature Range from -55°C to
+125°C Available
Popular Industry Standard Pin-Out
Resistance Seam Welded Case for Superior
Long Term Hermeticity
Efficiencies up to 83%
Shutdown from External Signal
Military Screening
250,000 hour MTBF at 85°C
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 in electrical, mechanical and screening can
be accommodated. Contact IR Santa Clara for special
requirements.
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1
12/14/06
ATW28XXS Series
Specifications
ATW2805S
Absolute Maximum Ratings
Input voltage
-0.5V to +50VDC
Soldering temperature
300°C for 10 seconds
Operating case temperature
-55°C to +125°C
Storage case temperature
-65°C to +135°C
Table I. Electrical Performance Characteristics
Test
Symbol
Output voltage
Conditions
-55°C ≤ Tc ≤+125°C
Vin = 28 Vdc ±5%, CL = 0
Unless otherwise specified
VOUT
IOUT = 0
1
IOUT
VRIP
1, 3
POUT
VRLINE
VIN = 19, 28, and 40 V dc
VIN = 19, 28, and 40 V dc,
B.W. = dc to 2MHz
VIN = 19,28, and 40 V dc
VIN = 19, 28, and 40 V dc,
Iout = 0, 3000, and 6000mA
Output current
2
Output ripple voltage
Output power
4
Line regulation
4
Group A
Subgroups
Device
Types
1
2,3
1,2,3
1,2,3
All
1,2,3
1
All
All
2,3
1,2,3
mA
mVp-p
5.0
W
mV
All
20
30
mV
1,2,3
All
18
mA
1,2,3
All
40
20
mAp-p
1
All
78
%
1
All
100
MΩ
4
All
500
µF
1
All
12
W
01
02
03
All
Power dissipation
load fault
PD
Switching frequency
FS
Short circuit, TC = +25°C
IOUT = 6000mA
4,5,6
VOTLOAD
4000mA to/from 6000mA
4,5,6
500mA to/from 2500mA
4,5,6
VRLOAD
Input current
IIN
Input ripple current
2
IRIP
Efficiency
EFF
Isolation
ISO
Capacitive load
5, 6
Output response to step
8
transient load changes
CL
All
All
Min
4.95
4.90
0
Unit
Max
5.05
5.10
6000
50
VIN = 19, 28, and 40 V dc,
IOUT = 0, 3000, and 6000mA
IOUT = 0, inhibit (pin 2)
tied to input return (pin 10)
IOUT = 0, inhibit (pin 2) = open
IOUT = 6000mA
B.W. = dc to 2MHz
IOUT = 6000mA
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
7
Overload, TC = +25°C
Load regulation
Limits
30
250
250
275
-500
9.0
300
270
300
+500
-500
+500
V
KHz
mVpk
For Notes to Specifications, refer to page 3
2
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ATW28XXS Series
Table I. Electrical Performance Characteristics - continued
Test
Symbol
Conditions
-55°C ≤ Tc ≤+125°C
Vin = 28 Vdc ±5%, CL = 0
unless otherwise specified
TTLOAD
4000mA to/from 6000mA
ATW2805S
Group A
Subgroups
Device
Types
4
All
Limits
Min
Recovery time step
transient load changes
8, 9
500mA to 2500mA
Turn on overshoot
10
Turn on delay
Load fault recovery
VTonOS
TonD
6, 10
TrLF
IOUT = 0 and 6000mA
IOUT = 0 and 6000mA
Unit
Max
100
µs
mV pk
ms
ms
5,6
4
5,6
4,5,6
4,5,6
All
All
200
100
200
500
12
4,5,6
All
12
All
Notes to Specifications
1
2
3
4
5
Parameter guaranteed by line and load regulation tests.
Bandwidth guaranteed by design. Tested for 20kHz to 2.0MHz.
Above +125°C case, derate output power linearly to 0 at +135°C.
Output voltage measured at load with remote sense leads connected across load.
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.
6 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.
7 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.
8 Load step transition time between 2.0µs and 10µs.
9 Recovery time is measured from the initiation of the transient to where V OUT has returned to within ±1.0% of V OUT at 50% load.
10 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
ATW28XXS Series
Specifications
ATW2812S
Absolute Maximum Ratings
Input voltage
-0.5V to +50VDC
Soldering temperature
300°C for 10 seconds
Operating case temperature
-55°C to +125°C
Storage case temperature
-65°C to +135°C
Table II. Electrical Performance Characteristics
Symbol
Test
Output voltage
1
Output current
2
Output ripple voltage
VOUT
IOUT = 0
IOUT
VRIP
VIN = 18, 28, and 40 V dc
VIN = 18, 28, and 40 V dc,
B.W. = 20Hz to 2MHz
VIN = 18, 28, and 40 V dc,
Iout = 0, 1250, and 2500mA
Line regulation
VRLINE
Load regulation
VRLOAD
Input current
IIN
Input ripple current
2
Conditions
-55°C ≤ Tc ≤+125°C
Vin = 28 Vdc ±5%, CL = 0
Unless otherwise specified
IRIP
Efficiency
EFF
Isolation
ISO
VIN = 18, 28, and 40 V dc,
IOUT = 0, 1250, and 2500mA
IOUT = 0, inhibit (pin 2)
tied to input return (pin 10)
IOUT = 0, inhibit (pin 2) =
open
IOUT = 2500mA
B.W. = 20Hz to 2MHz
IOUT = 2500mA
Group A
Subgroups
mVp-p
1
All
±30
mV
2,3
1,2,3
All
±60
±120
mV
1,2,3
All
18
mA
mA
All
1
2,3
1
All
4
All
200
µF
1
All
12
W
FS
Short circuit
IOUT = 2500mA
1,2,3
4,5,6
Output response to
step transient load
6
changes
VOTLOAD
1250mA to/from 2500mA
4,5,6
All
01
02
03
All
20
mAp-p
1,2,3
Switching frequency
0mA to/from 1250mA
V
50
PD
CL
Min
11.88
11.76
Unit
All
All
All
Power dissipation
load fault
3, 4
Limits
Max
12.12
12.24
2500
50
1
2,3
1,2,3
1,2,3
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
5
Overload
Capacitive load
Device
Types
78
75
100
%
MΩ
250
250
275
-800
9.0
300
270
300
+800
-1000
+1000
KHz
mVpk
For Notes to Specifications, refer to page 5
4
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ATW28XXS Series
Table II. Electrical Performance Characteristics - continued
ATW2812S
Test
Symbol
Conditions
-55°C ≤ Tc ≤ +125°C
Vin = 28 Vdc ±5%, CL = 0
unless otherwise specified
Group A
Subgroups
Device
Types
Recovery time step
6, 7
transient load changes
TTLOAD
1250mA to/from 2500mA
4
All
Limits
Min
0mA to 1250mA
Output response to
Transient step
Line changes
Recovery time
Transient step
Line changes
Turn on overshoot
Turn on delay
Load fault recovery
VOTLINE
TTLINE
VTonOS
TonD
4, 9
TrLF
Input step 18V to/ from
40V dc,
4, 8
IOUT = 2500mA
Input step 18V to/ from
40V dc
4, 7, 8
IOUT = 2500mA
IOUT = 0 and 2500mA
9
IOUT = 0 and 2500mA
5,6
4
5,6
4,5,6
Max
100
All
All
Unit
-1000
µs
200
5.0
10
+1000
mVpk
ms
4,5,6
All
500
µs
4,5,6
4,5,6
All
All
600
12
mVpk
ms
4,5,6
All
12
ms
Notes to Specifications
1
2
3
4
5
6
7
8
9
Parameter guaranteed by line and load regulation tests.
Bandwidth guaranteed by design. Tested for 20kHz to 2.0MHz.
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 II.
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 2.0µs and 10µs.
Recovery time is measured from the initiation of the transient to where V OUT has returned to within ±1.0% of VOUT at 50% load.
Input step transition time between 2.0µs and 10µs.
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 2) while power is applied to the input.
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ATW28XXS Series
Specifications
ATW2815S
Absolute Maximum Ratings
Input voltage
-0.5V to +50VDC
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
Output voltage
Conditions
-55°C ≤ Tc ≤ +125°C
Vin = 28 Vdc ±5%, CL = 0
Unless otherwise specified
V OUT
IOUT = 0
1
IOUT
VRIP
Output power
Line regulation
1, 3
P OUT
VRLINE
VIN = 17, 28, and 40 V dc
VIN = 17, 28, and 40 V dc,
B.W. = dc to 2MHz
VIN = 17,28, and 40 V dc
VIN = 17, 28, and 40 V dc,
Iout = 0, 677, and 1333mA
Load regulation
VRLOAD
Output current
2
Output ripple voltage
Power dissipation
load fault
PD
VIN = 17, 28, and 40 V dc,
IOUT = 0, 677, and 1333mA
IOUT = 0, inhibit (pin 2)
tied to input return (pin 10)
IOUT = 0, inhibit (pin 2) =
open
IOUT = 1333mA
B.W. = dc to 2MHz
IOUT = 1333mA
TC = +25°C
Input to output or any pin
to case (except pin 8) at
500
V dc Tc = +25°C
No effect on dc
performance,
Tc = +25°C
6
Overload, TC = +25°C
Switching frequency
FS
Short circuit, TC = +25°C
IOUT = 1333mA
Input current
IIN
Input ripple current
2
IRIP
Efficiency
E FF
Isolation
ISO
Capacitive load
4, 5
Output response to step
7
transient load changes
CL
VOTLOAD
50% load to/from 100%
load
No load to/from 50% load
Group A
Subgroups
Device
Types
1
2,3
1,2,3
1,2,3
All
1,2,3
1
All
All
2,3
1,2,3
1,2,3
Limits
Max
15.15
15.30
1333
60
mA
mVp-p
35
W
mV
All
75
150
mV
All
18
mA
All
All
Min
14.85
14.70
0
Unit
20
V
35
1,2,3
All
1
All
80
%
1
All
100
MΩ
4
All
200
µF
1
All
6.0
W
4,5,6
01
02
03
All
4
5,6
4
5,6
50
225
225
250
-300
6.0
275
245
275
+300
-450
-500
-750
+450
+500
+750
mAp-p
KHz
mVpk
For Notes to Specifications, refer to page 7
6
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ATW28XXS Series
ATW2815S
Table III. Electrical Performance Characteristics - continued
Symbol
Test
Conditions
-55°C ≤ Tc ≤ +125°C
Vin = 28 Vdc ±5%, CL = 0
unless otherwise specified
Group A
Subgroups
Device
Types
4
All
Max
70
µs
ms
mVpk
Limits
Min
Recovery time step
transient load
7, 8
changes
Unit
TTLOAD
50% load to/from 100% load
Output response to
transient step line
5, 9
changes
VOTLINE
No load to 50% load
50% load to no load
Input step 17 to 40 Vdc
5,6
4,5,6
4,5,6
4,5,6
All
100
1500
5.0
500
Recovery time
transient line
5, 8, 9
changes
TTLINE
Input step 40 to 17 Vdc
Input step 17 tp 40 Vdc
4,5,6
4,5,6
All
1500
800
ms
VTonOS
TonD
Input step 40 to 17 Vdc
IOUT = 0 and 1333mA
IOUT = 0 and 1333mA
4,5,6
4,5,6
4,5,6
All
All
800
600
10
mVpk
ms
4,5,6
All
10
75
ms
g
Turn on overshoot
10
Turn on delay
Load fault recovery
Weight
5
TrLF
Flange
Notes to Specifications
1
2
3
4
Parameter guaranteed by line and load regulation tests.
Bandwidth guaranteed by design. Tested for 20kHz to 2.0MHz.
For operation at 16 Vdc input, derate output power by 33%.
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.
5 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.
6 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.
7 Load step transition time between 2.0µs and 10µs.
8 Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1.0% of V OUT at 50% load.
9 Input step transition time between 2.0µs and 10µs.
10 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 2) while power is applied to the input.
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ATW28XXS Series
Block Diagram
5 +Vout
+Input
1
EMI
Filter
Output
4 Return
Enable
Input
2
Sync
Drive 1
Pulse Width
Modulator FB
8
6 +Sense
Error
Amp &
Ref
Drive 2
3 -Sense
Input
Return
10
Application Information
Inhibit Function (Enable)
Connecting the inhibit input (Pin 2) 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 ±1.0VDC.
EMI Filter
An optional EMI filter (AFC461) will reduce the input ripple
current to levels below the limits imposed by MIL-STD-461
CEO3.
Remote Sense (ATW2805S only)
Better than 0.1% line and load regulation (case temperature
constant) are typical when the remote sense leads are used.
If the remote sense leads are left unconnected, then the
output voltage (measured at pins 4 and 5) will rise to
approximately 5.4VDC. If the remote sense leads are shorted
together, the output voltage may rise above 10VDC
depending on load, possibly damaging both the converter
and load.
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 8) of the master device is
connected to the synchronization input (pin 8) 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
Device Synchronization
Whenever multiple DC/DC converters are utilized in a single
system, significant low frequency noise may be generated
due to the sight 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).
International Rectifier offers an option, which provides
synchronization of multiple AHE/ATW type converters, thus
eliminating this type of noise.
+ In
Return
AFC461
or
AFV461
Output
Case
Return
Output
+ In
ATW28xxS
Return
Return
MSTR
System
Bus
ATW28xxD Output
or Other Return
Return Compatable Output
+ In
Case
SLV
Output
+ In
Case
ATW28xxD
Return
Output
Return
SLV
8
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ATW28XXS Series
Mechanical Outline
1.000
0.05
10
8
3
7
2
4
6
1
9
0.040 D X
0.26 L Pins
5
4 X 0.400
=1.600
1.95
2.700
Max
2.360
0.500
Max
1.350
Max
Pin Designation
Pin #
*
Designation
1
+ Input
2
Enable Input
3
- Remote Sense *
4
Output Return
5
+ Output
6
+ Remote Sense *
7
Case Ground
8
NC ( or Sync. Option)
9
NC
10
Input Return
ATW2805S only. ATW2812S, ATW2815S have NC
Standard Microcircuit Drawing Equivalence Table
Standard Microcircuit
Drawing Number
5962-91579
5962-92110
5962-91599
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Vendor Cage
Code
52467
52467
52467
IR Standard
Part Number
ATW2805S
ATW2812S
ATW2815S
9
ATW28XXS Series
Device Screening
Requirement
MIL-STD-883 Method
Temperature Range
Element Evaluation
Non-Destructive
Bond Pull
No Suffix
ES
d
HB
-20°C to +85°C -55°C to +125°C
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
Internal Visual
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
N/A
N/A
PIND
2020
N/A
N/A
Burn-In
1015
N/A
48 hrs@hi temp
Final Electrical
MIL-PRF-38534
25°C
( Group A )
& Specification
PDA
MIL-PRF-38534
N/A
Seal, Fine and Gross
1014
Radiographic
2012
External Visual
2009
d
160 hrs@125°C 160 hrs@125°C
-55°C, +25°C,
-55°C, +25°C,
+125°C
+125°C
N/A
N/A
10%
Cond A
Cond A, C
Cond A, C
Cond A, C
N/A
N/A
N/A
N/A
Yes
Yes
Yes
25°C
c
Notes:
 Best commercial practice
‚ Sample tests at low and high temperatures
ƒ -55°C to +105°C for AHE, ATO, ATW
Part Numbering
ATW 28 15 S /CH - MSTR
Model
Input Voltage
Nominal
28 = 28V
Sync Option
MSTR = Master
SLV = Slave
Omit for Standard
Screening Level
(Please refer to Screening Table)
Output Voltage
No Suffix, ES, HB, CH
05 = 5V
12 = 12V
15 = 15V
Output
S = Single
WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 252-7105
IR SANTA CLARA: 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. 12/2006
10
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