PD - 94550A
ATR28XXD SERIES
HYBRID-HIGH RELIABILITY
DC/DC CONVERTER
Description
The ATR28XXD 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-704D input requirements, these devices
have nominal 28VDC inputs with ±12V and ±15V dual
outputs to satisfy a wide range of requirements. The
circuit design incorporates a pulse width modulated
single forward topology operating in the feed-forward
mode 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 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 feedback circuits.
Three standard temperature grades are offered with
screening options. Refer to Part Number section. They
can be provided in a standard plug-in package for PC
mounting or in a flanged package for more severe
environments.
Manufactured in a facility fully qualified to MIL-PRF-
38534, 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.
Extensive computer simulation using complex modeling
enables rapid design modification to be provided.
Contact IR Santa Clara with specific requirements.
28V Input, Dual Output
ATR
Features
16V to 40VDC Input Range (28VDC Nominal)
±
12V and
±
15V Outputs Available
Indefinite Short Circuit and Overload Protection
3
35W/in Power Density
30W Output Power
Fast Loop Response for Superior Transient
Characteristics
Operating Temperature Range from -55°C to
+125°C
Popular Industry Standard Pin-Out
Resistance Seam Welded Case for Superior
Long Term Hermeticity
Ceramic Feed-thru Pins
External Synchronization
High Efficiency
Shutdown from External Signal
Military Screening
Standard Microcircuit Drawings Available
www.irf.com
1
01/12/07
ATR28XXD Series
Specifications
T
CASE
= -55°C to +85°C, V
IN
= +28V
±
5% unless otherwise specified
Absolute Maximum Ratings
Input voltage
Power Output
Soldering temperature
Temperature Range
1
-0.5V to +50VDC
Internally limited, 36W typical
300°C for 10 seconds
Recommended Operating temperature
Maximum Operating temperature
Storage case temperature
-55°C to +85°C
-55°C to +115°C
-65°C to +135°C
PARAMETER
STATIC CHARACTERISTICS
OUTPUT
Voltage
Current
5
Ripple
Accuracy
Power
1
REGULATION
Line
Load
CROSS REGULATION
6
INPUT
Voltage Range
Current
Ripple Current
EFFICIENCY
ISOLATION
CAPACITIVE LOAD
Load Fault Power Dissipation
Switching Frequency
SYNC Frequency Range
7
DYNAMIC CHARACTERISTICS
Step Load Changes
Output
Transient
Recovery
2
Condition
-55
°
C
≤
TC
≤
+85
°
C, V
IN
= 28 V
DC
±5%,
CL=0, unless otherwise
specified
ATR2812D
Min
Typ
Max
Min
ATR2815D
Typ
Max
Units
V
IN
= 16 to 40 V
DC
I
OUT
= 0 to Full Load
Full Load, 20KHz to 2MHz
T
CASE
= 25°C, Full Load
V
IN
= 16 to 40 V
DC
I
OUT
= 0 to Full Load
V
IN
= 16, 28, and 40 V
DC
±11.76
0.0
±11.88
30
±12
40
±12
±12.24
±1.25
85
±12.12
75
120
±5
±14.70
0.0
±14.85
30
±15
40
±15.00
±15.30
±1.0
85
±15.15
75
150
±5
V
DC
A
DC
mV p-p
V
DC
W
mV
mV
%
V
DC
mA
DC
mA
DC
mA p-p
%
MΩ
µF
W
W
KHz
KHz
mVpk
mVpk
µ
s
µs
ms
mVpk
mVpk
ms
ms
16
No Load, pin 2 = open
Inhibited, pin 2 tied to pin 10
Full Load
Full Load T
C
= +25
°
C
Input to output @500 V
DC
No effect on performance
T
C
= +25°C (total for both outputs)
Short Circuit
Overload, T
C
= +25°C
I
OUT
= Full Load
28
25
82
40
75
18
50
16
28
25
82
40
75
18
50
100
100
9.0
14
600
700
±100
±250
25
500
3.0
±180
-600
5.0
5.0
0.0
14
14
600
25
25
100
100
9.0
14
600
700
±100
±250
25
500
3.0
±180
-600
5.0
5.0
0.0
14
14
600
25
25
500
500
500
500
50% Load to 100% Load
No Load to 50% Load
50% Load to 100% Load
No Load to 50% Load
50% Load to No Load
Input step
Input step
Input step
Input step
16
40
16
40
to
to
to
to
40
16
40
16
V
DC
V
DC
V
DC
V
DC
Step Line Changes
Output
Transient
Recovery
2
TURN-ON
Overshoot
Delay
3
Load Fault Recovery
V
IN
= 16 to 40 V
DC
I
OUT
= O and Full Load
V
IN
= 16 to 40 V
DC
mVpk
ms
ms
Notes to Specifications
1.
2.
3.
4.
5.
6.
7.
Above +85°C case temperature, derate output power linearly to 0 at +115°C case.
Recovery time is measured from the initiation of the input transient to where V
OUT
has returned to within
±1%
of V
OUT
at 50% load.
Turn-on delay time measurement is for either an application of power at the input or a signal at the inhibit pin.
Load current split equally between +V
OUT
and –V
OUT
.
Up to 90% of Full Power is available from either output provided. The total power output does not exceed 30W.
3W load on output under test, 3W to 27W on other output.
Sync. Input signal: V
IL
= -0.5V Min, 0.8V Max and V
IN
= 2.5V Min, 11.5V Max for 10% to 90% duty cycle.
2
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ATR28XXD Series
Specifications
T
CASE
= -55°C to +125°C, V
IN
= +28V
±
5% unless otherwise specified
A bso lu te M axim u m R ating s
Input voltage
P ow er O utput
S oldering tem perature
T em perature R ange
1
-0.5V to +50V DC
Internally lim ited, 36W typical
300°C for 10 seconds
Recom m ended O perating tem perature
M axim um Operating tem perature
Storage case tem perature
Condition
-55°C
≤
TC
≤
+125°C, V
IN
= 28
V
DC
±5%,
CL=0, unless
otherwise specified
-55°C to +125°C
-55°C to +135°C
-65°C to +135°C
ATR2812D/ES
Min
Typ
Max
Min
ATR2815D/ES
Typ
Max
Units
PARAMETER
STATIC CHARACTERISTICS
OUTPUT
Voltage
Current
5
Ripple
Accuracy
Power
1
REGULATION
Line
Load
CROSS REGULATION
6
INPUT
Voltage Range
Current
Ripple Current
EFFICIENCY
ISOLATION
CAPACITIVE LOAD
Load Fault Power Dissipation
Switching Frequency
SYNC Frequency Range
7
DYNAMIC CHARACTERISTICS
Step Load Changes
Output
Transient
Recovery
2
V
IN
= 16 to 40 V
DC
I
OUT
= 0 to Full Load
Full Load, 20KHz to 2MHz
T
CASE
= 25°C, Full Load
V
IN
= 16 to 40 V
DC
I
OUT
= 0 to Full Load
V
IN
= 16, 28, and 40 V
DC
±11.76
0.0
±11.88
30
±12
40
±12.00
±12.24
±1.25
85
±12.12
75
120
±5
±14.70
0.0
±14.85
30
±15
40
±15.00
±15
±1.0
85
±15.15
75
150
±5
V
DC
A
DC
mV p-p
V
DC
W
mV
mV
%
V
DC
mA
DC
mA
DC
mA p-p
%
MΩ
µF
W
W
KHz
KHz
mVpk
mVpk
µs
µs
ms
mVpk
mVpk
ms
ms
16
No Load, pin 2 = open
Inhibited, pin 2 tied to pin 10
Full Load
Full Load T
C
= +25°C
Input to output @500 V
DC
No effect on performance
T
C
= +25°C (total for both
outputs)
Short Circuit
Overload, T
C
= +25°C
I
OUT
= Full Load
28
25
82
40
75
18
50
16
28
25
82
40
75
18
50
80
100
79
100
100
9.0
14
600
700
100
9.0
14
600
700
±100
±250
25
500
3.0
±180
-600
5.0
5.0
500
500
±100
±250
25
500
3.0
±180
-600
5.0
5.0
0.0
14
14
500
500
50% Load to 100% Load
No Load to 50% Load
50% Load to 100% Load
No Load to 50% Load
50% Load to No Load
Input
Input
Input
Input
step
step
step
step
16
40
16
40
to
to
to
to
40
16
40
16
V
DC
V
DC
V
DC
V
DC
Step Line Changes
Output
Transient
Recovery
2
TURN-ON
Overshoot
Delay
3
Load Fault Recovery
V
IN
= 16 to 40 V
DC
I
OUT
= O to Full Load
V
IN
= 16 to 40 V
DC
600
25
25
0.0
14
14
600
25
25
mVpk
ms
ms
Notes to Specifications
1.
2.
3.
4.
5.
6.
7.
Above +125°C case temperature, derate output power linearly to 0 at +135°C case.
Recovery time is measured from the initiation of the input transient to where V
OUT
has returned to within
±1%
of V
OUT
at 50% load.
Turn-on delay time measurement is for either an application of power at the input or a signal at the inhibit pin.
Load current split equally between +V
OUT
and –V
OUT
.
Up to 90% of Full Power is available from either output provided. The total power output does not exceed 30W.
3W load on output under test, 3W to 27W on other output.
Sync. Input signal: V
IL
= -0.5V Min, 0.8V Max and V
IN
= 2.5V Min, 11.5V Max for 10% to 90% duty cycle.
www.irf.com
3
ATR28XXD Series
Specifications
T
CASE
= -55°C to +125°C, V
IN
= +28V
±
5% unless otherwise specified
Absolute Maximum Ratings
Input voltage
Power Output
Soldering temperature
Temperature Range
1
-0.5V to +50VDC
Internally limited, 36W typical
300°C for 10 seconds
Recommended Operating temperature
Maximum Operating temperature
Storage case temperature
Condition
-55°C
≤
TC
≤
+125°C, V
IN
= 28 V
DC
±5%,
CL=0, unless otherwise
specified
-55°C to +125°C
-55°C to +135°C
-65°C to +135°C
PARAMETER
STATIC CHARACTERISTICS
OUTPUT
Voltage
Current
5
Ripple
Accuracy
Power
1
REGULATION
Line
4
Load
4
CROSS REGULATION
6
INPUT
Voltage Range
Current
Ripple Current
EFFICIENCY
ISOLATION
CAPACITIVE LOAD
Load Fault Power Dissipation
Switching Frequency
SYNC Frequency Range
7
DYNAMIC CHARACTERISTICS
Step Load Changes
Output
4
Transient
Recovery
2
ATR2812D/HB
Min
Typ
Max
Min
ATR2815D/HB
Typ
Max
Units
V
IN
= 16 to 40 V
DC
I
OUT
= 0 to Full Load
Full Load, 20KHz to 2MHz
T
CASE
= 25°C, Full Load
V
IN
= 16 to 40 V
DC
I
OUT
= 0 to Full Load
V
IN
= 16, 28, and 40 V
DC
±11.76
0.0
±11.88
30
±12.00
40
±12.00
±12.24
±1.25
85
±12.12
75
120
±5
±14.70
0.0
±14.85
30
±15
40
±15.00
±15.30
±1.0
85
±15.15
75
150
±5
V
DC
A
DC
mV p-p
V
DC
W
mV
mV
%
V
DC
mA
DC
mA
DC
mA p-p
%
MΩ
µF
W
W
KHz
KHz
mVpk
mVpk
µs
µs
ms
mVpk
mVpk
ms
ms
mVpk
ms
ms
16
No Load, pin 2 = open
Inhibited, pin 2 tied to pin 10
Full Load
Full Load T
C
= +25°C
Input to output @500 V
DC
No effect on performance
T
C
= +25°C (total for both outputs)
Short Circuit
Overload, T
C
= +25°C
I
OUT
= Full Load
28
25
82
40
75
18
50
16
28
18
25
82
40
75
18
50
80
100
79
100
100
9.0
14
600
700
100
9.0
14
600
700
±100
±250
25
500
3.0
±180
-600
5.0
5.0
0.0
14
14
±450
±750
70
1500
5.0
1500
-1500
10
10
600
25
25
500
500
±100
±250
25
500
3.0
±180
-600
5.0
5.0
0.0
14
14
500
500
50% Load to 100% Load
No Load to 50% Load
50% Load to 100% Load
No Load to 50% Load
50% Load to No Load
Input step
Input step
Input step
Input step
16
40
16
40
to
to
to
to
40 V
DC
16 V
DC
40 V
DC
16 V
DC
±450
±760
70
1500
5.0
1200
-1500
10
10
600
25
25
Step Line Changes
Output
Transient
Recovery
2
TURN-ON
Overshoot
Delay
3
Load Fault Recovery
V
IN
= 16 to 40 V
DC
I
OUT
= O to Full Load
V
IN
= 16 to 40 V
DC
Notes to Specifications
1.
2.
3.
4.
5.
6.
7.
Above +125°C case temperature, derate output power linearly to 0 at +135°C case.
Recovery time is measured from the initiation of the input transient to where V
OUT
has returned to within
±1%
of V
OUT
at 50% load.
Turn-on delay time measurement is for either an application of power at the input or a signal at the inhibit pin.
Load current split equally between +V
OUT
and –V
OUT
.
Up to 90% of Full Power is available from either output provided. The total power output does not exceed 30W.
3W load on output under test, 3W to 27W on other output.
Sync. Input signal: V
IL
= -0.5V Min, 0.8V Max and V
IN
= 2.5V Min, 11.5V Max for 10% to 90% duty cycle.
4
www.irf.com
ATR28XXD Series
Specifications
T
CASE
= -55°C to +125°C, V
IN
= +28V
±
5% unless otherwise specified
Absolute Maximum Ratings
Input voltage
Power Output
Soldering temperature
Temperature Range
1
-0.5V to +50VDC
Internally limited, 36W typical
300°C for 10 seconds
Recommended Operating temperature
Maximum Operating temperature
Storage case temperature
Condition
-55°C
≤
TC
≤
+125°C, V
IN
= 28 V
DC
±5%,
CL=0, unless otherwise
specified
-55°C to +125°C
-55°C to +135°C
-65°C to +135°C
ATR2812D/CH
Min
Typ
Max
Min
ATR2815D/CH
Typ
Max
Units
PARAMETER
STATIC CHARACTERISTICS
OUTPUT
Voltage
Current
5
Ripple
Accuracy
Power
1
REGULATION
Line
4
Load
4
CROSS REGULATION
6
INPUT
Voltage Range
Current
Ripple Current
EFFICIENCY
ISOLATION
CAPACITIVE LOAD
Load Fault Power Dissipation
Switching Frequency
SYNC Frequency Range
7
DYNAMIC CHARACTERISTICS
Step Load Changes
Output
4
Transient
Recovery
2
V
IN
= 16 to 40 V
DC
I
OUT
= 0 to Full Load
Full Load, 20KHz to 2MHz
T
CASE
= 25°C, Full Load
V
IN
= 16 to 40 V
DC
I
OUT
= 0 to Full Load
V
IN
= 16, 28, and 40 V
DC
±11.76
0.0
±11.88
30
±12.00
40
±12.00
±12.24
±1.25
85
±12.12
75
120
±5
±14.70
0.0
±14.85
30
±15
40
±15.00
±15.30
±1.0
85
±15.15
75
150
±5
V
DC
A
DC
mV p-p
V
DC
W
mV
mV
%
V
DC
mA
DC
mA
DC
mA p-p
%
MΩ
µF
W
W
KHz
KHz
mVpk
mVpk
µs
µs
ms
mVpk
mVpk
ms
ms
mVpk
ms
ms
16
No Load, pin 2 = open
Inhibited, pin 2 tied to pin 10
Full Load
Full Load T
C
= +25°C
Input to output @500 V
DC
No effect on performance
T
C
= +25°C (total for both outputs)
Short Circuit
Overload, T
C
= +25°C
I
OUT
= Full Load
28
25
82
40
75
18
50
16
28
18
25
82
40
75
18
50
80
100
79
100
100
9.0
14
600
700
100
9.0
14
600
700
±100
±250
25
500
3.0
±180
-600
5.0
5.0
0.0
14
14
±450
±750
70
1500
5.0
1500
-1500
10
10
600
25
25
500
500
±100
±250
25
500
3.0
±180
-600
5.0
5.0
0.0
14
14
500
500
50% Load to 100% Load
No Load to 50% Load
50% Load to 100% Load
No Load to 50% Load
50% Load to No Load
Input
Input
Input
Input
step
step
step
step
16
40
16
40
to
to
to
to
40
16
40
16
V
DC
V
DC
V
DC
V
DC
±450
±760
70
1500
5.0
1200
-1500
10
10
600
25
25
Step Line Changes
Output
Transient
Recovery
2
TURN-ON
Overshoot
Delay
3
Load Fault Recovery
V
IN
= 16 to 40 V
DC
I
OUT
= 0 to Full Load
V
IN
= 16 to 40 V
DC
Notes to Specifications
1.
2.
3.
4.
5.
6.
7.
Above +125°C case temperature, derate output power linearly to 0 at +135°C case.
Recovery time is measured from the initiation of the input transient to where V
OUT
has returned to within
±1%
of V
OUT
at 50% load.
Turn-on delay time measurement is for either an application of power at the input or a signal at the inhibit pin.
Load current split equally between +V
OUT
and –V
OUT
.
Up to 90% of Full Power is available from either output provided. The total power output does not exceed 30W.
3W load on output under test, 3W to 27W on other output.
Sync. Input signal: V
IL
= -0.5V Min, 0.8V Max and V
IN
= 2.5V Min, 11.5V Max for 10% to 90% duty cycle.
www.irf.com
5
