DVEHF2800T Series
HIGH RELIABILITY HYBRID
DC-DC CONVERTERS
WITH INTEGRAL EMI FILTER
DESCRIPTION
The DVEHF 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 DVEHF series is a fault tolerant
magnetic feedback circuit. Operating at a nominal
fixed frequency of 450 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
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High Reliability
Very Low Output Noise
Wide Input Voltage Range: 15 to 50 Volts per
MIL-STD-704
Up to 10 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
Solder Seal Hermetic Package
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, SC01 and CS02
Non-flanged Version Available
MIL-PRF-38534 Element Evaluated
Components
Figure 1
– DVEHF2800T DC-DC Converter
(Not
To Scale)
1X030DSD
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
DVEHF2800T Series
SPECIFICATIONS
(T
CASE
= -55°C to +125°C, V
IN
= +28V ± 5%, Full Load
5
, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
Input Voltage (Transient, 1 second)
Output Power
Power Dissipation (Full Load, T
CASE
= +125°C)
Parameter
50 V
DC
80 Volts
10 Watts
5.0 Watts
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight (Maximum)
DVEHF28512T
Min
Typ
28
-
3.5
-
-
11.0
-
-
5.0
12.0
5.0
12.0
-
-
-
-
-
15
15
10
15
5
10
-
72
-
-
-
450
-
350
Max
50
80
6.0
70
1.5
13.0
12.0
8.0
5.05
12.12
5.075
12.6
10
5.0
3.5
1.0
0.29
50
50
20
50
20
50
50
-
7.5
7.5
500
550
-
-
Min
15
-
-
-
0
9.0
8.0
4.0
4.95
14.85
4.925
14.25
0
0.15
0
0
0
-
-
-
-
-
-
-
67
-
-
-
350
100
-
+15°C
-65°C to +150°C
270°C
50 Grams
Units
Max
50
80
6.0
70
1.5
13.0
12.0
8.0
5.05
15.15
5.075
15.75
10
5.0
3.5
1.0
0.23
50
50
20
50
20
50
50
-
7.5
7.5
500
550
-
-
V
V
mA
mA
V
V
V
V
V
V
V
V
W
W
W
A
A
mV
p-p
mV
p-p
mV
mV
mV
mV
mV
%
W
W
µF
kHz
MΩ
kHrs
Conditions
DVEHF28515T
Typ
28
-
3.5
-
-
11.0
-
-
5.0
15.0
5.0
15.0
-
-
-
-
-
15
15
10
15
5
10
-
72
-
-
-
450
-
350
STATIC
INPUT
Voltage
Current
Inhibit Pin Input
UVLO Turn On
UVLO Turn Off
OUTPUT
Voltage
4
4
4
Continuous
Transient, 1 sec
Inhibited
No Load
4
15
-
-
-
0
9.0
8.0
4.0
Inhibit Pin Open Circuit Voltage
V
MAIN
±V
AUX
V
MAIN
±V
AUX
Total
Power
4
T
CASE
= 25°C
T
CASE
= -55°C to +125°C
4.95
11.88
4.925
11.4
0
0.15
V
MAIN
±V
AUX
6
Either Output
Either Output
5
6
0
0
0
-
-
-
-
5
Current
3
V
MAIN
±V
AUX
V
MAIN
±V
AUX
V
MAIN
±V
AUX
V
MAIN
±V
AUX
±V
AUX
Ripple Voltage
Line Regulation
Load Regulation
Cross Regulation
EFFICIENCY
Full Load , 20Hz to 10MHz
V
IN
= 15V to 50V
No Load to Full Load
-
-
-
67
-
-
-
350
+V
OUT
= 30%, -V
OUT
= 70%
+V
OUT
= 70%, -V
OUT
= 30%
Full Load
Overload
5
4
LOAD FAULT POWER DISSIPATION
CAPACITIVE LOAD
ISOLATION
MTBF (MIL-HDBK-217F)
4
Short Circuit
SWITCHING FREQUENCY
500 V
DC
, T
CASE
= 25°C
AIF @ T
C
= 55°C
100
-
1X030DSD
2
DVEHF2800T Series
SPECIFICATIONS
(T
CASE
= -55°C to +125°C, V
IN
= +28V ± 5%, Full Load
5
, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
Input Voltage (Transient, 1 second)
Output Power
Power Dissipation (Full Load, T
CASE
= +125°C)
50 V
DC
80 Volts
10 Watts
5.0 Watts
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight (Maximum)
DVEHF28512T
Min
Typ
Max
Min
+15°C
-65°C to +150°C
270°C
50 Grams
Parameter
Conditions
DVEHF28515T
Typ
Max
Units
DYNAMIC
Load Step Output Transient
Load Step Recovery
2
V
MAIN
±V
AUX
V
MAIN
±V
AUX
V
MAIN
±V
AUX
V
MAIN
±V
AUX
V
MAIN
±V
AUX
V
IN
= 0V to 28V
V
IN
= 16V to 40V
Half Load to Full Load
-
-
-
-
-
-
-
-
-
-
-
200
100
200
200
200
50
200
200
20
-
-
500
400
500
500
600
100
500
500
30
25
50
-
-
-
-
-
-
-
-
-
-
-
200
100
200
200
200
50
200
200
20
-
-
500
400
500
500
600
100
500
500
30
25
50
mV
PK
mV
PK
µSec
µSec
mV
PK
mV
PK
µSec
µSec
mSec
mV
PK
mV
PK
Line Step Output Transient
Line Step Recovery
Turn On Delay
Turn On Overshoot
2, 4
4
Notes:
1.
2.
3.
4.
5.
6.
This note intentionally not used.
Time for output voltage to settle within 1% of its nominal value.
Derate linearly to 0 at 135°C.
Verified by qualification testing.
5.0W on V
MAIN
and 2.5W on ±V
AUX
.
Up to 70% of the total auxiliary power or current can be drawn from either of the auxiliary outputs.
1X030DSD
3
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