DVHE2800S Series
1X055DSA
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 DVHE series of high reliability DC-DC
converters is operable over the full military (-55 C to
+125 C) temperature range with no power derating.
Operating at a fixed frequency, these regulated,
isolated units utilize well controlled undervoltage
lockout circuitry to eliminate slow start-up problems.
The DVHE is optimized for low voltage applications
with high efficiency synchronous rectification and fast
transient response.
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 Efficiency, Up to 90%
Low Output Voltage Models
Up to 50 Watts Output Power
Up to 10 Amps Output Current
High
Reliability
Very Low Output Noise
Wide Input Voltage Range: 16 to 40 Volts
Input Transient Voltage: 50 Volts for 1 sec
Output Voltage Trim +/-10%
NO Use of Optoisolators
Undervoltage
Lockout
Short Circuit / Current Limit Protection
High Power Density: > 50 W/in
3
Industry Standard Package
Precision Seam Seal or Solder Seal Hermetic
Package
Flanged and Non-flanged Versions Available.
Custom Versions Available
Additional Environmental Screening Available
Meets MIL-STD-461C and MIL-STD-461D EMC
Requirements When Used With a DVMC28 EMI
Filter
MIL-PRF-38534 Element Evaluated
Components
Figure 1 DVHE2800S DC-DC Converter
(Not To Scale)
DVHE2800S Series
1X055DSA
2
SPECIFICATIONS
(T
CASE
= -55C to +125C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
40 V
DC
Junction Temperature Rise to Case
+10C
Input Voltage (Transient, 1 second)
50 Volts
Storage Temperature
-65C to +150C
Output Power
1
50 Watts
Lead Solder Temperature (10 seconds)
270C
Power Dissipation (Full Load, T
CASE
= +125C)
9 Watts
Weight (Maximum) (Un-Flanged / Flanged)
(52 / 55) Grams
DVHE281R9S DVHE282R5S
Parameter Conditions
Min Typ Max Min Typ Max
Units
STATIC
Continuous
16 28 40 16 28 40 V
INPUT
Voltage
4
Transient,
1
sec
- - 50 - - 50 V
Inhibited
- - 6 - - 6
mA
Current
No
Load
90 90
mA
Ripple Current
Full Load, 20Hz to 10MHz
100
150
mA
p-p
Inhibit Pin Input
4
0 - 1.5 0 - 1.5
V
Inhibit Pin Open Circuit Voltage
4
7 9 11 7 9 11 V
UVLO Turn On
14
15
15.8
14
15
15.8
V
UVLO Turn Off
4
13 14 15 13 14 15 V
V
OUT
T
CASE
=
25C
1.88 1.90 1.92 2.47 2.50 2.53 V
OUTPUT
Voltage
V
OUT
T
CASE
=
-55C
to
+125C 1.84 1.9 1.96 2.44 2.50 2.56 V
Power
3
0 19 0 25
W
Current
3
V
OUT
0 10 0 10
A
Ripple Voltage
V
OUT
Full Load, 20Hz to 10MHz
150
150
mV
p-p
Line Regulation
V
OUT
V
IN
= 16V to 40V
1
10
1
10
mV
Load Regulation
V
OUT
No Load to Full Load
15
30
15
30
mV
EFFICIENCY
80 84 83 87 %
Overload
4
10 10 W
LOAD FAULT POWER DISSIPATION
Short
Circuit
10 10 W
CAPACITIVE LOAD
4
5000 5000
F
SWITCHING
FREQUENCY
220 260 300 220 260 300 kHz
ISOLATION 500
V
DC
100 - - 100 - - M
MTBF (MIL-HDBK-217F)
AIF @ T
C
=
55C
- 381 - - 381 - kHrs
Load Step Output Transient
V
OUT
- 200
350 - 200
350
mV
PK
Load Step Recovery
2
Half Load to Full Load
- 200
300 - 200
300
Sec
Line Step Output Transient
4
V
OUT
- 100
200 - 150
250
mV
PK
Line Step Recovery
2, 4
V
IN
= 16V to 40V
- 200
300 - 200
300
Sec
Turn On Delay
V
OUT
- - 30 - - 30
mSec
Turn On Overshoot
V
IN
= 0V to 28V
- - 15 - - 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.
DVHE2800S Series
1X055DSA
3
SPECIFICATIONS
(T
CASE
= -55C to +125C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
40 V
DC
Junction Temperature Rise to Case
+10C
Input Voltage (Transient, 1 second)
50 Volts
Storage Temperature
-65C to +150C
Output Power
1
50 Watts
Lead Solder Temperature (10 seconds)
270C
Power Dissipation (Full Load, T
CASE
= +125C)
9 Watts
Weight (Maximum) (Un-Flanged / Flanged)
(49 / 52) Grams
DVHE283R3S DVHE2805S
Parameter Conditions
Min Typ Max Min Typ Max
Units
STATIC
Continuous
16 28 40 16 28 40 V
INPUT
Voltage
4
Transient,
1
sec
- - 50 - - 50 V
Inhibited
- - 6 - - 6
mA
Current
No Load
110
-
-
140
mA
Ripple Current
Full Load, 20Hz to 10MHz
150
-
-
150
mA
p-p
Inhibit Pin Input
4
0 - 1.5 0 - 1.5
V
Inhibit Pin Open Circuit Voltage
4
7 9 11 7 9 11 V
UVLO Turn On
14
15
15.8
14
15
15.8
V
UVLO Turn Off
4
13 14 15 13 14 15 V
V
OUT
T
CASE
=
25C
3.27 3.30 3.33 4.95 5.00 5.05 V
OUTPUT
Voltage
V
OUT
T
CASE
=
-55C
to
+125C 3.22 3.30 3.38 4.87 5.00 5.13 V
Power
3
0
33
0
-
50
W
Current
3
V
OUT
0
10
0
-
10
A
Ripple Voltage
V
OUT
Full Load, 20Hz to 10MHz
75
150
-
100
200
mV
p-p
Line Regulation
V
OUT
V
IN
= 16V to 40V
1
10
-
1
10
mV
Load Regulation
V
OUT
No Load to Full Load
15
30
-
15
30
mV
EFFICIENCY
85 88 86 90 %
Overload
4
10 - - 12 W
LOAD FAULT POWER DISSIPATION
Short
Circuit
14 - - 14 W
CAPACITIVE LOAD
4
5000 - - 5000
F
SWITCHING
FREQUENCY
220 260 300 300 350 400 kHz
ISOLATION 500
V
DC
100 - - 100 - - M
MTBF (MIL-HDBK-217F)
AIF @ T
C
= 55C
-
381 - - 381 - kHrs
DYNAMIC
Load Step Output Transient
V
OUT
- 200
350 - 250
400
mV
PK
Load Step Recovery
2
Half Load to Full Load
200
300 - 200
300
Sec
Line Step Output Transient
4
V
OUT
- 150
250 - 300
350
mV
PK
Line Step Recovery
2, 4
V
IN
= 16V to 40V
200
300 - 200
300
Sec
Turn On Delay
V
OUT
- - 30 - - 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.
DVHE2800S Series
1X055DSA
4
BLOCK DIAGRAM
Figure 2
CONNECTION DIAGRAM
Figure 3
DVHE2800S Series
1X055DSA
5
INHIBIT DRIVE CONNECTION DIAGRAMS
Figure 4 Internal Inhibit Circuit and Recommended Drive
Figure 5 Isolated Inhibit Drive
(Shown with optional capacitor for turn-on delay)
(Shown with optional capacitor for turn-on delay)
EMI FILTER HOOKUP DIAGRAM
Figure 6 Converter with EMI Filter
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