DVTR2800S Series
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
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
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)
DVTR2800S Series
1X007DSG
2
SPECIFICATIONS
(T
CASE
= -55C to +125C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
50 V
DC
Junction Temperature Rise to Case
+15C
Input Voltage (Transient, 1 second)
80 Volts
Storage Temperature
-65C to +150C
Output Power
1
40 Watts
Lead Solder Temperature (10 seconds)
270C
Power Dissipation (Full Load, T
CASE
= +125C)
13 Watts
Weight (Maximum) (Un-Flanged / Flanged)
(49 / 52) Grams
DVTR283R3S DVTR2805S
Parameter Conditions
Min Typ Max Min Typ Max
Units
STATIC
Continuous
15 28 50 15 28 50 V
INPUT
Voltage
4
Transient,
1
sec
- - 80 - - 80 V
Inhibited
- - 6 - - 6
mA
Current
No
Load
- - 90 - - 90
mA
Ripple Current
Full Load, 20Hz to 10MHz
-
-
50
-
-
50
mA
p-p
Inhibit Pin Input
4
0 - 1.5 0 - 1.5
V
Inhibit Pin Open Circuit Voltage
4
9.0 11.0 13.0 9.0 11.0 13.0 V
UVLO Turn On
12.0
-
14.8
12.0
-
14.8
V
UVLO Turn Off
4
11.0 - 14.5
11.0 - 14.5 V
V
OUT
T
CASE
=
25C
3.25 3.30 3.35 4.95 5.00 5.05 V
OUTPUT
Voltage
V
OUT
T
CASE
=
-55C
to
+125C 3.20 3.30 3.40 4.875 5.00 5.125 V
Power
3
0 - 20 0 - 30
W
Current
3
V
OUT
0 -
6.06
0 - 6.0
A
Ripple Voltage
V
OUT
Full Load, 20Hz to 10MHz
-
-
50
-
-
50
mV
p-p
Line Regulation
V
OUT
V
IN
= 15V to 50V
-
-
20
-
-
20
mV
Load Regulation
V
OUT
No Load to Full Load
-
-
50
-
-
50
mV
EFFICIENCY
67 - - 72 - - %
Overload
4
- - 16 - - 16 W
LOAD FAULT POWER DISSIPATION
Short
Circuit
- - 16 - - 16 W
CAPACITIVE LOAD
4
- - 1000 - - 1000
F
SWITCHING
FREQUENCY
400 475 550 400 475 550 kHz
SYNC FREQUENCY RANGE
V
H
- V
L
= 5V, DC = 20-80%
500
-
600
500
-
600
kHz
ISOLATION 500
V
DC
100 - - 100 - - M
MTBF (MIL-HDBK-217F)
AIF @ T
C
=
55C
- 413 - - 413 - kHrs
DYNAMIC
Load Step Output Transient
V
OUT
- - 400 - - 500
mV
PK
Load Step Recovery
2
Half Load to Full Load
- - 500 - - 500
Sec
Line Step Output Transient
4
V
OUT
- 300
600 - 300
600
mV
PK
Line Step Recovery
2, 4
V
IN
= 16V to 40V
- 300
500 - 300
500
Sec
Turn On Delay
V
OUT
- - 20 - - 20
mSec
Turn On Overshoot
V
IN
= 0V to 28V
- - 15 - - 25
mV
PK
Notes: 1. Dependant on output voltage.
2. Time for output voltage to settle within 1% of its nominal value.
3. Derate linearly to 0 at 135C.
4. Verified by qualification testing.
DVTR2800S Series
1X007DSG
3
SPECIFICATIONS
(T
CASE
= -55C to +125C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
50 V
DC
Junction Temperature Rise to Case
+15C
Input Voltage (Transient, 1 second)
80 Volts
Storage Temperature
-65C to +150C
Output Power
1
40 Watts
Lead Solder Temperature (10 seconds)
270C
Power Dissipation (Full Load, T
CASE
= +125C)
13 Watts
Weight (Maximum) (Un-Flanged / Flanged)
(49 / 52) Grams
DVTR2812S DVTR2815S
Parameter Conditions
Min Typ Max Min Typ Max
Units
STATIC
Continuous
15 28 50 15 28 50 V
INPUT
Voltage
4
Transient,
1
sec
- - 80 - - 80 V
Inhibited
- - 6 - - 6
mA
Current
No
Load
- - 90 - - 90
mA
Ripple Current
Full Load, 20Hz to 10MHz
-
-
50
-
-
50
mA
p-p
Inhibit Pin Input
4
0 - 1.5 0 - 1.5
V
Inhibit Pin Open Circuit Voltage
4
9.0 11.0 13.0 9.0 11.0 13.0 V
UVLO Turn On
12.0
-
14.8
12.0
-
14.8
V
UVLO Turn Off
4
11.0 - 14.5
11.0 - 14.5 V
V
OUT
T
CASE
=
25C
11.88 12.0 12.12 14.85 15.0 15.15 V
OUTPUT
Voltage
V
OUT
T
CASE
= -55C to +125C
11.70
12.0
12.30
14.625
15.0
15.375
V
Power
3
0 - 40 0 - 40
W
Current
3
V
OUT
0 -
3.33
0 -
2.67
A
Ripple Voltage
V
OUT
Full Load, 20Hz to 10MHz
-
-
50
-
-
50
mV
p-p
Line Regulation
V
OUT
V
IN
= 15V to 50V
-
-
20
-
-
20
mV
Load Regulation
V
OUT
No Load to Full Load
-
-
50
-
-
50
mV
EFFICIENCY
76 - - 77 - - %
Overload
4
- - 14 - - 14 W
LOAD FAULT POWER DISSIPATION
Short
Circuit
- - 14 - - 14 W
CAPACITIVE LOAD
4
- - 500 - - 500
F
SWITCHING
FREQUENCY
400 475 550 400 475 550 kHz
SYNC FREQUENCY RANGE
V
H
- V
L
= 5V, DC = 20-80%
500
-
600
500
-
600
kHz
ISOLATION 500
V
DC
100 - - 100 - - M
MTBF (MIL-HDBK-217F)
AIF @ T
C
=
55C
- 413 - - 413 - kHrs
DYNAMIC
Load Step Output Transient
V
OUT
- - 700 - - 700
mV
PK
Load Step Recovery
2
Half Load to Full Load
- - 500 - - 500
Sec
Line Step Output Transient
4
V
OUT
- 500
900 - 500
900
mV
PK
Line Step Recovery
2, 4
V
IN
= 16V to 40V
- 300
500 - 300
500
Sec
Turn On Delay
V
OUT
- - 20 - - 20
mSec
Turn On Overshoot
V
IN
= 0V to 28V
- - 50 - - 50
mV
PK
Notes: 1. Dependant on output voltage.
2. Time for output voltage to settle within 1% of its nominal value.
3. Derate linearly to 0 at 135C.
4. Verified by qualification testing.
DVTR2800S Series
1X007DSG
4
SPECIFICATIONS
(T
CASE
= -55C to +125C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
50 V
DC
Junction Temperature Rise to Case
+15C
Input Voltage (Transient, 1 second)
80 Volts
Storage Temperature
-65C to +150C
Output Power
1
40 Watts
Lead Solder Temperature (10 seconds)
270C
Power Dissipation (Full Load, T
CASE
= +125C)
13 Watts
Weight (Maximum) (Un-Flanged / Flanged)
(49 / 52) Grams
DVTR285R2S DVTR282R5S
Parameter Conditions
Min Typ Max Min Typ Max
Units
STATIC
Continuous
15 28 50 15 28 50 V
INPUT
Voltage
4
Transient,
1
sec
- - 80 - - 80 V
Inhibited
- - 6 - - 6
mA
Current
No
Load
- - 90 - - 90
mA
Ripple Current
Full Load, 20Hz to 10MHz
-
-
50
-
-
50
mA
p-p
Inhibit Pin Input
4
0 - 1.5 0 - 1.5
V
Inhibit Pin Open Circuit Voltage
4
9.0 11.0 13.0 9.0 11.0 13.0 V
UVLO Turn On
12.0
-
14.8
12.0
-
14.8
V
UVLO Turn Off
4
11.0 - 14.5
11.0 - 14.5 V
V
OUT
T
CASE
=
25C
5.14 5.20 5.26 2.47 2.50 2.53 V
OUTPUT
Voltage
V
OUT
T
CASE
=
-55C
to
+125C 5.07 5.20 5.33 2.46 2.50 2.54 V
Power
3
0 - 30 0 - 15
W
Current
3
V
OUT
0 - 6.0 0 - 6.0
A
Ripple Voltage
V
OUT
Full Load, 20Hz to 10MHz
-
-
50
-
-
50
mV
p-p
Line Regulation
V
OUT
V
IN
= 15V to 50V
-
-
20
-
-
20
mV
Load Regulation
V
OUT
No Load to Full Load
-
-
50
-
-
50
mV
EFFICIENCY
72 - - 63 - - %
Overload
4
- - 16 - - 18 W
LOAD FAULT POWER DISSIPATION
Short
Circuit
- - 16 - - 18 W
CAPACITIVE LOAD
4
- - 1000 - - 1000
F
SWITCHING
FREQUENCY
400 475 550 400 475 550 kHz
SYNC FREQUENCY RANGE
V
H
- V
L
= 5V, DC = 20-80%
500
-
600
500
-
600
kHz
ISOLATION 500
V
DC
100 - - 100 - - M
MTBF (MIL-HDBK-217F)
AIF @ T
C
=
55C
- 413 - - 413 - kHrs
DYNAMIC
Load Step Output Transient
V
OUT
- - 500 - - 400
mV
PK
Load Step Recovery
2
Half Load to Full Load
- - 500 - - 500
Sec
Line Step Output Transient
4
V
OUT
- 300
600 - 250
450
mV
PK
Line Step Recovery
2, 4
V
IN
= 16V to 40V
- 300
500 - 300
450
Sec
Turn On Delay
V
OUT
- - 20 - - 20
mSec
Turn On Overshoot
V
IN
= 0V to 28V
- - 25 - - 15
mV
PK
Notes: 1. Dependant on output voltage.
2. Time for output voltage to settle within 1% of its nominal value.
3. Derate linearly to 0 at 135C.
4. Verified by qualification testing.
DVTR2800S Series
1X007DSG
5
BLOCK DIAGRAM
UNDER
VOLTAGE
SHUTDOWN
PRIMARY
HOUSEKEEPING
SUPPLY
PWM
CONTROL
VOLTAGE AND
CURRENT
AMPLIFIERS
SECONDARY
HOUSEKEEPING
SUPPLY
PIN 1
28V IN
PIN 10
IN COM
L1
C1
Q1
Rs1
T1
D1
C2
Rs2
+V OUT
PIN 5
PIN 4
OUT COM
INH
PIN 2
FEEDBACK
MAGNETIC
SYNC
PIN 9
-S
PIN 3
+S
PIN 6
Figure 2
CONNECTION DIAGRAM
10
IN COM
2
INH
1
28V IN
5
+V OUT
4
OUT COM
LOAD
+
-
28 Vdc
-S
3
+S
6
SYNC
9
Figure 3
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