PD - 94550
ATR28XXD SERIES
ADVANCED ANALOG
HYBRID-HIGH RELIABILITY
DC/DC CONVERTERS
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 re-
sponse for superior line and load transient character-
istics and offers greater reliability and radiation toler-
ance than devices incorporating optical feedback cir-
cuits.
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 en-
vironments.
These converters are manufactured in a facility certi-
fied to MIL-PRF-38534. All processes used to manu-
facture 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 for class H. The HB
grade converters are processed to full class H screen-
ing but do not have class H element evaluation as re-
quired by MIL-PRF-38534. Both grades are fully tested
and operate over the full military temperature range
without derating of output power. The ES version is a
full temperature device without the full class H or ele-
ment evaluation. The non-suffix device is a low cost
28V Input, Dual Output
ATR
Features
n
16 to 40 VDC Input Range (28 VDC Nominal)
n
±
12V and
±
15V Outputs Available
n
Indefinite Short Circuit and Overload
Protection
3
n
35 W/in Power Density
n
30 Watt Output Power
n
Fast Loop Response for Superior Transient
Characteristics
n
Operating Temperature Range from -55°C to
+125°C
n
Popular Industry Standard Pin-Out
n
Resistance Seam Welded Case for Superior
Long Term Hermeticity
n
Ceramic Feed-thru Pins
n
External Synchronization
n
High Efficiency
n
Shutdown from External Signal
n
Military Screening
limited temperature range option. Variations in
electrical, mechanical and screening can be ac-
commodated.
Extensive computer simulation using complex
modeling enables rapid design modification to
be provided. Contact Advanced Analog with spe-
cific requirements.
www.irf.com
1
10/29/02
ATR28XXD Series
Specifications
T
CASE
= -55°C to +85°C, V
IN
= +28V
±
5% unless otherwise specified
ABSOLUTE MAXIMUM RATINGS
Input Voltage
-0.5V to 50VDC
Power Output
Internally limited, 36W typical
Soldering
300°C for 10 seconds
Recommended Operating
-55°C to +85°C
Temperature Range
1
Maximum Operating
-55°C to +115°C
Storage
-65°C to +135°C
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
PARAMETER
STATIC CHARACTERISTICS
OUTPUT
Voltage
5
Current
Ripple
Accuracy
1
Power
REGULATION
Line
Load
6
CROSS REGULATION
INPUT
Voltage Range
Current
Ripple Current
EFFICIENCY
ISOLATION
CAPACITIVE LOAD
Load Fault Power Dissipation
Switching Frequency
7
SYNC Frequency Range
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
±11.76
0.0
±11.88
30
±12.00
40
±12.00
±12.24
±1.25
85
±12.12
±14.70
0.0
±14.85
30
±15.00
40
±15.00
±15.30
±1.0
85
±15.15
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
V
IN
= 16 to 40 V
DC
I
OUT
= 0 to Full Load
V
IN
= 16, 28, and 40 V
DC
16.0
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
28.0
75
120
±5
40.0
75
18
50
16.0
28.0
75
150
±5
40.0
75
18
50
25
82
100
25
82
100
100
9
14
600
700
±100
±250
25
500
3
±180
-600
5
5
0
14
14
600
25
25
100
9
14
600
700
±100
±250
25
500
3
±180
-600
5
5
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 16 to 40 V
DC
Input step 40 to 16 V
DC
Input step 16 to 40 V
DC
Input step 40 to 16 V
DC
V
IN
= 16 to 40 V
DC
I
OUT
= O and Full Load
V
IN
= 16 to 40 V
DC
mVpk
mVpk
µs
µs
ms
mVpk
mVpk
ms
ms
mVpk
ms
ms
Step Line Changes
Output
Transient
2
Recovery
TURN-ON
Overshoot
3
Delay
Load Fault Recovery
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 30 watts.
3W load on output under test, 3W to 27W on other output.
Sync. Input signal: V
IL
= -0.5V Min, V
IN
= 2.5V Min, 10% to 90% duty cycle,
0.8V Max
11.5V Max
2
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
-0.5V to 50VDC
Power Output
Internally limited, 36W typical
Soldering
300°C for 10 seconds
Temperature Range
1
Recommended Operating
Maximum Operating
Storage
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
5
Current
Ripple
Accuracy
1
Power
REGULATION
Line
Load
6
CROSS REGULATION
INPUT
Voltage Range
Current
Ripple Current
EFFICIENCY
ISOLATION
CAPACITIVE LOAD
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
±14.70
0.0
±14.85
30
±15.00
40
±15.00
±15.30
±1.0
85
±15.15
V
DC
A
DC
mV p-p
V
DC
W
mV
mV
%
V
DC
mA
DC
mA
DC
mA p-p
%
MΩ
µF
75
120
±5
16.0
28.0
40.0
75
18
50
16.0
28.0
75
150
±5
40.0
75
18
50
Load Fault Power Dissipation
Switching Frequency
7
SYNC Frequency Range
DYNAMIC CHARACTERISTICS
Step Load Changes
Output
Transient
Recovery
2
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
80
100
25
82
79
100
100
25
82
100
500
500
±100
±250
25
500
3
±180
-600
5
5
0
14
14
9
14
600
700
500
500
±100
±250
25
500
3
±180
-600
5
5
9
14
600
700
W
W
KHz
KHz
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 16 to 40
VDC
Input step 40 to 16 V
DC
Input step 16 to 40 V
DC
Input step 40 to 16 V
DC
V
IN
= 16 to 40 V
DC
I
OUT
= O to Full Load
V
IN
= 16 to 40 V
DC
mVpk
mVpk
µs
µs
ms
mVpk
mVpk
ms
ms
600
25
25
mVpk
ms
ms
Step Line Changes
Output
Transient
2
Recovery
TURN-ON
Overshoot
3
Delay
Load Fault Recovery
600
25
25
0
14
14
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 30 watts.
3W load on output under test, 3W to 27W on other output.
Sync. Input signal: V
IL
= -0.5V Min, V
IN
= 2.5V Min, 10% to 90% duty cycle
0.8V Max,
11.5V Max
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
-0.5V to 50VDC
Power Output
Internally limited, 36W typical
Soldering
300°C for 10 seconds
Temperature Range
1
Recommended Operating
Maximum Operating
Storage
-55°C to +125°C
-55°C to +135°C
-65°C to +135°C
PARAMETER
STATIC CHARACTERISTICS
OUTPUT
Voltage
5
Current
Ripple
Accuracy
1
Power
REGULATION
4
Line
4
Load
6
CROSS REGULATION
INPUT
Voltage Range
Current
Ripple Current
EFFICIENCY
ISOLATION
CAPACITIVE LOAD
Load Fault Power Dissipation
Switching Frequency
7
SYNC Frequency Range
DYNAMIC CHARACTERISTICS
Step Load Changes
4
Output
Transient
Recovery
2
Condition
-55°C
≤
TC
≤
+125°C, V
IN
= 28 V
DC
±5%,
CL=0, unless otherwise
specified
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
±14.70
0.0
±14.85
30
±15.00
40
±15.00
±15.30
±1.0
85
±15.15
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
75
120
±5
16.0
28.0
40.0
75
18
50
16.0
28.0
18
25
82
75
150
±5
40.0
75
18
50
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
80
100
25
82
79
100
100
9
14
600
700
100
9
14
600
700
±100
±250
25
500
3
±180
-600
5
5
0
14
14
±450
±750
70
1500
5
1500
-1500
10
10
600
25
25
500
500
±100
±250
25
500
3
±180
-600
5
5
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 16 to 40
VDC
Input step 40 to 16 V
DC
Input step 16 to 40 V
DC
Input step 40 to 16 V
DC
V
IN
= 16 to 40 V
DC
I
OUT
= O to Full Load
V
IN
= 16 to 40 V
DC
±450
±760
70
1500
5
1200
-1500
10
10
600
25
25
mVpk
mVpk
µs
µs
ms
mVpk
mVpk
ms
ms
mVpk
ms
ms
Step Line Changes
Output
Transient
2
Recovery
TURN-ON
Overshoot
3
Delay
Load Fault Recovery
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 30 watts.
3W load on output under test, 3W to 27W on other output.
Sync. Input signal: V
IL
= -0.5V Min, V
IN
= 2.5V Min, 10% to 90% duty cycle
0.8V Max,
11.5V Max
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
-0.5V to 50VDC
Power Output
Internally limited, 36W typical
Soldering
300°C for 10 seconds
Temperature Range
1
Recommended Operating
Maximum Operating
Storage
-55°C to +125°C
-55°C to +135°C
-65°C to +135°C
PARAMETER
STATIC CHARACTERISTICS
OUTPUT
Voltage
5
Current
Ripple
Accuracy
1
Power
REGULATION
4
Line
4
Load
6
CROSS REGULATION
INPUT
Voltage Range
Current
Ripple Current
EFFICIENCY
ISOLATION
CAPACITIVE LOAD
Load Fault Power Dissipation
Switching Frequency
7
SYNC Frequency Range
DYNAMIC CHARACTERISTICS
Step Load Changes
4
Output
Transient
Recovery
2
Condition
-55°C
≤
TC
≤
+125°C, V
IN
= 28 V
DC
±5%,
CL=0, unless otherwise
specified
ATR2812D/CH
Min
Typ
Max
Min
ATR2815D/CH
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
±14.70
0.0
±14.85
30
±15.00
40
±15.00
±15.30
±1.0
85
±15.15
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
75
120
±5
16.0
28.0
40.0
75
18
50
16.0
28.0
18
25
82
75
150
±5
40.0
75
18
50
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
80
100
25
82
79
100
100
9
14
600
700
100
9
14
600
700
±100
±250
25
500
3
±180
-600
5
5
0
14
14
±450
±750
70
1500
5
1500
-1500
10
10
600
25
25
500
500
±100
±250
25
500
3
±180
-600
5
5
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 16 to 40
VDC
Input step 40 to 16 V
DC
Input step 16 to 40 V
DC
Input step 40 to 16 V
DC
V
IN
= 16 to 40 V
DC
I
OUT
= 0 to Full Load
V
IN
= 16 to 40 V
DC
±450
±760
70
1500
5
1200
-1500
10
10
600
25
25
mVpk
mVpk
µs
µs
ms
mVpk
mVpk
ms
ms
mVpk
ms
ms
Step Line Changes
Output
Transient
2
Recovery
TURN-ON
Overshoot
3
Delay
Load Fault Recovery
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 30 watts.
3W load on output under test, 3W to 27W on other output.
Sync. Input signal: V
IL
= -0.5V Min, V
IN
= 2.5V Min, 10% to 90% duty cycle
0.8V Max,
11.5V Max
www.irf.com
5
