DVETR2800S Series
1X031DSF
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
WITH INTEGRAL EMI FILTER
DESCRIPTION
The DVETR 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 DVETR series is a fault tolerant
magnetic feedback circuit. Operating at a nominal
fixed frequency of 500 kHz per stage, 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
Fault Tolerant 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
Precision Solder Seal Hermetic Package
High Power Density: > 30 W/in
3
Custom Versions Available
Additional Environmental Screening Available
No External EMI Filter Required
Meets MIL-STD-461C and MIL-STD-461D EMC
Requirements
Protects Against Conducted Susceptibility
Specified in MIL-STD-461C, CS01 and CS02
Flanged and Non-flanged Versions Available
MIL-PRF-38534 Element Evaluated
Components
Figure 1 DVETR2800S / DVETR2800SF DC-DC Converter
(Not To Scale)
DVETR2800S Series
1X031DSF
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)
14 Watts
Weight (Maximum) (Un-Flanged / Flanged)
(51 / 55) Grams
DVETR283R3S DVETR2805S
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
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
3.267 3.30 3.333 4.95 5.00 5.05 V
OUTPUT
Voltage
V
OUT
T
CASE
=
-55C
to
+125C 3.25 3.30 3.35 4.90 5.00 5.10 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
65 - - 70 - - %
Overload
4
- - 16 - - 16 W
LOAD FAULT POWER DISSIPATION
Short
Circuit
- - 16 - - 16 W
CAPACITIVE LOAD
4
- - 1000 - - 1000
F
SWITCHING
FREQUENCY
400 475 550 450 500 550 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
- 150
600 - 150
600
mV
PK
Line Step Recovery
2, 4
V
IN
= 16V to 40V
- 100
500 - 100
500
Sec
Turn On Delay
V
OUT
- - 20 - - 20
mSec
Turn On Overshoot
V
IN
= 0V to 28V
- - 30 - - 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.
DVETR2800S Series
1X031DSF
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)
14 Watts
Weight (Maximum) (Un-Flanged / Flanged)
(51 / 55) Grams
DVETR2812S DVETR2815S
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
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
11.72
12.0
12.18
14.775
15.0
15.225
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
74 - - 75 - - %
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
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 - - 800
mV
PK
Load Step Recovery
2
Half Load to Full Load
- - 500 - - 500
Sec
Line Step Output Transient
4
V
OUT
- 800
1200 - 800
1200
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.
DVETR2800S Series
1X031DSF
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)
14 Watts
Weight (Maximum) (Un-Flanged / Flanged)
(51 / 55) Grams
DVETR285R2S
Parameter Conditions
Min Typ Max
Units
STATIC
Continuous
15 28 50 V
INPUT
Voltage
4
Transient, 1 sec
-
-
80
V
Inhibited -
-
6
mA
Current
No Load
-
-
90
mA
Inhibit Pin Input
4
0
-
1.5
V
Inhibit Pin Open Circuit Voltage
4
9.0
11.0
13.0
V
UVLO Turn On
12.0
-
14.8
V
UVLO Turn Off
4
11.0
-
14.5
V
V
OUT
T
CASE
= 25C
5.14
5.20
5.26
V
OUTPUT
Voltage
V
OUT
T
CASE
= -55C to +125C
5.09
5.20
5.31
V
Power
3
0
-
30
W
Current
3
V
OUT
0
-
6.0
A
Ripple Voltage
V
OUT
Full Load, 20Hz to 10MHz
-
-
50
mV
p-p
Line Regulation
V
OUT
V
IN
= 15V to 50V
-
-
20
mV
Load Regulation
V
OUT
No Load to Full Load
-
-
50
mV
EFFICIENCY
70
-
-
%
Overload
4
- - 16
W
LOAD FAULT POWER DISSIPATION
Short Circuit
-
-
16
W
CAPACITIVE LOAD
4
-
-
1000
F
SWITCHING
FREQUENCY
400 500 550 kHz
ISOLATION 500
V
DC
100 - - M
MTBF (MIL-HDBK-217F)
AIF @ T
C
= 55C
-
413
-
kHrs
DYNAMIC
Load Step Output Transient
V
OUT
- -
500
mV
PK
Load Step Recovery
2
Half Load to Full Load
- -
500
Sec
Line Step Output Transient
4
V
OUT
- 150
600
mV
PK
Line Step Recovery
2, 4
V
IN
= 16V to 40V
- 100
500
Sec
Turn On Delay
V
OUT
- - 20
mSec
Turn On Overshoot
V
IN
= 0V to 28V
- - 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.
DVETR2800S Series
1X031DSF
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
Q1
Rs1
T1
D1
C2
Rs2
+V OUT
PIN 5
PIN 4
OUT COM
INH
PIN 2
FEEDBACK
MAGNETIC
-S
PIN 3
+S
PIN 6
EMI
FILTER
Figure 2
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