DVTR2800S Series
HIGH RELIABILITY HYBRID
DC-DC CONVERTERS
DESCRIPTION
The DVTR series of high reliability DC-DC converters
is operable over the full military (-55 °C to +125 °C)
temperature range with no power derating. Unique
to the DVTR series is a magnetic feedback circuit
that is radiation immune. Operating at a nominal
fixed frequency of 475 kHz, these regulated, isolated
units utilize well controlled undervoltage lockout
circuitry to eliminate slow start-up problems.
These converters are designed and manufactured in
a facility qualified to ISO9001 and certified to MIL-
PRF-38534 and MIL-STD-883.
This product may incorporate one or more of the
following U.S. patents:
5,784,266
5,790,389
5,963,438
5,999,433
6,005,780
6,084,792
6,118,673
FEATURES
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High Reliability
Very Low Output Noise
Wide Input Voltage Range: 15 to 50 Volts per
MIL-STD-704
Up to 40 Watts Output Power
Output Voltage Trim Up +10%
Radiation Immune Magnetic Feedback Circuit
NO Use of Optoisolators
Undervoltage Lockout
Indefinite Short Circuit Protection
Current Limit Protection
Industry Standard Pinout
High Input Transient Voltage: 80 Volts for 1 sec
per MIL-STD-704A
Radiation Hardened Version Available
Precision Seam Seal or Solder Seal Hermetic
Package
High Power Density: > 40 W/in
3
Custom Versions Available
Additional Environmental Screening Available
Meets MIL-STD-461C and MIL-STD-461D EMC
Requirements When Used With a DVMC28 EMI
Filter
Flanged and Non-flanged Versions Available.
MIL-PRF-38534 Element Evaluated
Components
Figure 1
– DVTR2800S / DVTR2800SF DC-DC Converter
(Not
To Scale)
1X007DSG
11314 4th Avenue
West, Suite 206
Everett, WA 98204
http://www.vpt-inc.com
Sales Information:
Phone: (425) 353-3010
Fax: (425) 353-4030
E-mail: vptsales@vpt-inc.com
1
DVTR2800S Series
SPECIFICATIONS
(T
CASE
= -55°C to +125°C, V
IN
= +28V ± 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
Input Voltage (Transient, 1 second)
Output Power
1
Power Dissipation (Full Load, T
CASE
= +125°C)
50 V
DC
80 Volts
40 Watts
13 Watts
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight (Maximum) (Un-Flanged / Flanged)
DVTR283R3S
Min
15
-
-
-
-
0
4
+15°C
-65°C to +150°C
270°C
(49 / 52) Grams
Parameter
STATIC
INPUT
4
Voltage
Current
Ripple Current
Inhibit Pin Input
UVLO Turn On
UVLO Turn Off
OUTPUT
Voltage
Power
3
3
4
4
Conditions
DVTR2805S
Max
50
80
6
90
50
1.5
13.0
14.8
14.5
3.35
3.40
20
6.06
50
20
50
-
16
16
1000
550
600
-
-
Typ
28
-
-
-
-
-
11.0
-
-
3.30
3.30
-
-
-
-
-
-
-
-
-
475
-
-
413
Min
15
-
-
-
-
0
9.0
12.0
11.0
4.95
4.875
0
0
-
-
-
72
-
-
-
400
500
100
-
Typ
28
-
-
-
-
-
11.0
-
-
5.00
5.00
-
-
-
-
-
-
-
-
-
475
-
-
413
Max
50
80
6
90
50
1.5
13.0
14.8
14.5
5.05
5.125
30
6.0
50
20
50
-
16
16
1000
550
600
-
-
Units
Continuous
Transient, 1 sec
Inhibited
No Load
Full Load, 20Hz to 10MHz
V
V
mA
mA
mA
p-p
V
V
V
V
V
V
W
A
mV
p-p
mV
mV
%
W
W
µF
kHz
kHz
MΩ
kHrs
Inhibit Pin Open Circuit Voltage
9.0
12.0
11.0
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
T
CASE
= 25°C
T
CASE
= -55°C to +125°C
3.25
3.20
0
0
Current
Ripple Voltage
Line Regulation
Load Regulation
EFFICIENCY
Full Load, 20Hz to 10MHz
V
IN
= 15V to 50V
No Load to Full Load
Overload
4
-
-
-
67
-
-
-
400
LOAD FAULT POWER DISSIPATION
CAPACITIVE LOAD
4
Short Circuit
SWITCHING FREQUENCY
SYNC FREQUENCY RANGE
ISOLATION
MTBF (MIL-HDBK-217F)
V
H
- V
L
= 5V, DC = 20-80%
500 V
DC
AIF @ T
C
= 55°C
V
OUT
V
OUT
V
OUT
500
100
-
DYNAMIC
Load Step Output Transient
Load Step Recovery
Line Step Recovery
Turn On Delay
Turn On Overshoot
2
4
Half Load to Full Load
V
IN
= 16V to 40V
V
IN
= 0V to 28V
-
-
-
-
-
-
-
-
300
300
-
-
400
500
600
500
20
15
-
-
-
-
-
-
-
-
300
300
-
-
500
500
600
500
20
25
mV
PK
µSec
mV
PK
µSec
mSec
mV
PK
Line Step Output Transient
2, 4
Notes:
1. Dependant on output voltage.
3. Derate linearly to 0 at 135°C.
2. Time for output voltage to settle within 1% of its nominal value.
4. Verified by qualification testing.
1X007DSG
2
DVTR2800S Series
SPECIFICATIONS
(T
CASE
= -55°C to +125°C, V
IN
= +28V ± 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
Input Voltage (Transient, 1 second)
Output Power
1
Power Dissipation (Full Load, T
CASE
= +125°C)
50 V
DC
80 Volts
40 Watts
13 Watts
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight (Maximum) (Un-Flanged / Flanged)
DVTR2812S
Min
15
-
-
-
-
0
4
+15°C
-65°C to +150°C
270°C
(49 / 52) Grams
Parameter
STATIC
INPUT
4
Voltage
Current
Ripple Current
Inhibit Pin Input
UVLO Turn On
UVLO Turn Off
OUTPUT
Voltage
Power
3
3
4
4
Conditions
DVTR2815S
Max
50
80
6
90
50
1.5
13.0
14.8
14.5
12.12
12.30
40
3.33
50
20
50
-
14
14
500
550
600
-
-
Typ
28
-
-
-
-
-
11.0
-
-
12.0
12.0
-
-
-
-
-
-
-
-
-
475
-
-
413
Min
15
-
-
-
-
0
9.0
12.0
11.0
14.85
14.625
0
0
-
-
-
77
-
-
-
400
500
100
-
Typ
28
-
-
-
-
-
11.0
-
-
15.0
15.0
-
-
-
-
-
-
-
-
-
475
-
-
413
Max
50
80
6
90
50
1.5
13.0
14.8
14.5
15.15
15.375
40
2.67
50
20
50
-
14
14
500
550
600
-
-
Units
Continuous
Transient, 1 sec
Inhibited
No Load
Full Load, 20Hz to 10MHz
V
V
mA
mA
mA
p-p
V
V
V
V
V
V
W
A
mV
p-p
mV
mV
%
W
W
µF
kHz
kHz
MΩ
kHrs
Inhibit Pin Open Circuit Voltage
9.0
12.0
11.0
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
T
CASE
= 25°C
T
CASE
= -55°C to +125°C
11.88
11.70
0
0
Current
Ripple Voltage
Line Regulation
Load Regulation
EFFICIENCY
Full Load, 20Hz to 10MHz
V
IN
= 15V to 50V
No Load to Full Load
Overload
4
-
-
-
76
-
-
-
400
LOAD FAULT POWER DISSIPATION
CAPACITIVE LOAD
4
Short Circuit
SWITCHING FREQUENCY
SYNC FREQUENCY RANGE
ISOLATION
MTBF (MIL-HDBK-217F)
V
H
- V
L
= 5V, DC = 20-80%
500 V
DC
AIF @ T
C
= 55°C
V
OUT
V
OUT
V
OUT
500
100
-
DYNAMIC
Load Step Output Transient
Load Step Recovery
Line Step Recovery
Turn On Delay
Turn On Overshoot
2
4
Half Load to Full Load
V
IN
= 16V to 40V
V
IN
= 0V to 28V
-
-
-
-
-
-
-
-
500
300
-
-
700
500
900
500
20
50
-
-
-
-
-
-
-
-
500
300
-
-
700
500
900
500
20
50
mV
PK
µSec
mV
PK
µSec
mSec
mV
PK
Line Step Output Transient
2, 4
Notes:
1. Dependant on output voltage.
3. Derate linearly to 0 at 135°C.
2. Time for output voltage to settle within 1% of its nominal value.
4. Verified by qualification testing.
1X007DSG
3
DVTR2800S Series
SPECIFICATIONS
(T
CASE
= -55°C to +125°C, V
IN
= +28V ± 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
Input Voltage (Transient, 1 second)
Output Power
1
Power Dissipation (Full Load, T
CASE
= +125°C)
50 V
DC
80 Volts
40 Watts
13 Watts
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight (Maximum) (Un-Flanged / Flanged)
DVTR285R2S
Min
15
-
-
-
-
0
4
+15°C
-65°C to +150°C
270°C
(49 / 52) Grams
Parameter
STATIC
INPUT
4
Voltage
Current
Ripple Current
Inhibit Pin Input
UVLO Turn On
UVLO Turn Off
OUTPUT
Voltage
Power
3
3
4
4
Conditions
DVTR282R5S
Max
50
80
6
90
50
1.5
13.0
14.8
14.5
5.26
5.33
30
6.0
50
20
50
-
16
16
1000
550
600
-
-
Typ
28
-
-
-
-
-
11.0
-
-
5.20
5.20
-
-
-
-
-
-
-
-
-
475
-
-
413
Min
15
-
-
-
-
0
9.0
12.0
11.0
2.47
2.46
0
0
-
-
-
63
-
-
-
400
500
100
-
Typ
28
-
-
-
-
-
11.0
-
-
2.50
2.50
-
-
-
-
-
-
-
-
-
475
-
-
413
Max
50
80
6
90
50
1.5
13.0
14.8
14.5
2.53
2.54
15
6.0
50
20
50
-
18
18
1000
550
600
-
-
Units
Continuous
Transient, 1 sec
Inhibited
No Load
Full Load, 20Hz to 10MHz
V
V
mA
mA
mA
p-p
V
V
V
V
V
V
W
A
mV
p-p
mV
mV
%
W
W
µF
kHz
kHz
MΩ
kHrs
Inhibit Pin Open Circuit Voltage
9.0
12.0
11.0
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
T
CASE
= 25°C
T
CASE
= -55°C to +125°C
5.14
5.07
0
0
Current
Ripple Voltage
Line Regulation
Load Regulation
EFFICIENCY
Full Load, 20Hz to 10MHz
V
IN
= 15V to 50V
No Load to Full Load
Overload
4
-
-
-
72
-
-
-
400
LOAD FAULT POWER DISSIPATION
CAPACITIVE LOAD
4
Short Circuit
SWITCHING FREQUENCY
SYNC FREQUENCY RANGE
ISOLATION
MTBF (MIL-HDBK-217F)
V
H
- V
L
= 5V, DC = 20-80%
500 V
DC
AIF @ T
C
= 55°C
V
OUT
V
OUT
V
OUT
500
100
-
DYNAMIC
Load Step Output Transient
Load Step Recovery
Line Step Recovery
Turn On Delay
Turn On Overshoot
2
4
Half Load to Full Load
V
IN
= 16V to 40V
V
IN
= 0V to 28V
-
-
-
-
-
-
-
-
300
300
-
-
500
500
600
500
20
25
-
-
-
-
-
-
-
-
250
300
-
-
400
500
450
450
20
15
mV
PK
µSec
mV
PK
µSec
mSec
mV
PK
Line Step Output Transient
2, 4
Notes:
1. Dependant on output voltage.
3. Derate linearly to 0 at 135°C.
2. Time for output voltage to settle within 1% of its nominal value.
4. Verified by qualification testing.
1X007DSG
4
DVTR2800S Series
BLOCK DIAGRAM
PIN 1
28V IN
L1
C1
IN COM
PIN 10
Q1
MAGNETIC
FEEDBACK
Rs1
VOLTAGE AND
CURRENT
AMPLIFIERS
-S
PIN 3
+S
PIN 6
C2
Rs2
OUT COM
PIN 4
T1
D1
PIN 5
+V OUT
UNDER
VOLTAGE
SHUTDOWN
PRIMARY
HOUSEKEEPING
SUPPLY
INH
PIN 2
SYNC
PIN 9
PWM
CONTROL
SECONDARY
HOUSEKEEPING
SUPPLY
Figure 2
CONNECTION DIAGRAM
1
28V IN
9
SYNC
28 Vdc
+S
LOAD
INH
-S
10
IN COM OUT COM
4
3
+V OUT
6
5
+
-
2
Figure 3
1X007DSG
5
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