DVHV2800S Series
HIGH RELIABILITY HYBRID
DC-DC CONVERTERS
DESCRIPTION
The DVHV 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 DVHV series are robust and effective
input and output filters which provide dramatically
reduced input and output noise performance when
compared to other manufacturers competing
devices. Operating at a nominal fixed frequency of
475 kHz, these regulated, isolated units utilize a high
speed magnetic feedback design and well controlled
undervoltage lockout circuitry to eliminate slow start-
up problems. The output voltage is trimmable up to
+10% or down –20%.
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
Output Voltage Trim Up +10% or Down –20%
Wide Input Voltage Range: 15 to 50 Volts per
MIL-STD-704
Up to 15 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 Seam Seal Hermetic Package
Custom Versions Available
Additional Environmental Screening Available
Meets MIL-STD-461 Revisions C, D, E and F
EMC Requirements When Used With VPT’s
EMI Filters
Flanged and Non-flanged Versions Available.
MIL-PRF-38534 Element Evaluated
Components
Space Applications should consider VPT’s “S”
Series of Radiation Tolerant Power Conversion
Devices. Contact VPT for details.
Figure 1
– DVHV2800S / DVHV2800SF DC-DC Converter
(Exact
marking may differ from that shown)
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
DVHV2800S-5.0
1
DVHV2800S 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)
ESD Rating per MIL-PRF-38534
50 V
DC
80 Volts
15 Watts
6 Watts
3A
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight (Maximum) (Un-Flanged / Flanged)
+15°C
-65°C to +150°C
270°C
(52 / 55) 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
4
Conditions
DVHV283R3S
Min
15
-
-
-
-
0
9.0
12.0
11.0
DVHV2805S
Max
50
80
6
90
50
1.5
13.0
14.8
14.5
3.34
3.35
10
3.03
30
20
50
-
11
11
1000
550
600
-
-
Typ
28
-
-
-
-
-
11.0
-
-
3.30
3.30
-
-
-
-
-
-
-
-
-
475
-
-
413
Min
15
-
-
-
-
0
9.0
12.0
11.0
4.95
4.925
0
0
-
-
-
73
-
-
-
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
5.075
15
3.0
30
20
50
-
11
11
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
F
kHz
kHz
MΩ
kHrs
Inhibit Pin Open Circuit Voltage
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
T
CASE
= 25°C
T
CASE
= -55°C to +125°C
3.26
3.25
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
Short Circuit
-
-
-
68
-
-
-
400
LOAD FAULT POWER DISSIPATION
CAPACITIVE LOAD
4
4
SWITCHING FREQUENCY
SYNC FREQUENCY RANGE
ISOLATION
MTBF (MIL-HDBK-217F)
V
H
– V
L
= 5V
Duty Cycle = 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
-
-
200
550
600
500
20
15
-
-
-
-
-
-
-
-
300
300
-
-
300
500
600
500
20
25
mV
PK
Sec
mV
PK
Sec
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.
DVHV2800S-5.0
2
DVHV2800S 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)
ESD Rating per MIL-PRF-38534
50 V
DC
80 Volts
15 Watts
6 Watts
3A
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight (Maximum) (Un-Flanged / Flanged)
+15°C
-65°C to +150°C
270°C
(52 / 55) 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
4
Conditions
DVHV2812S
Min
15
-
-
-
-
0
9.0
12.0
11.0
DVHV2815S
Max
50
80
6
90
50
1.5
13.0
14.8
14.5
12.12
12.18
15
1.25
40
20
50
-
11
11
500
550
600
-
-
Typ
28
-
-
-
-
-
11.0
-
-
12.0
12.0
-
-
-
-
-
-
-
-
-
475
-
-
413
Min
15
-
-
-
-
0
9.0
12.0
11.0
14.85
14.775
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
15.225
15
1.0
40
20
50
-
11
11
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
F
kHz
KHz
MΩ
kHrs
Inhibit Pin Open Circuit Voltage
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
11.82
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
Short Circuit
-
-
-
77
-
-
-
400
LOAD FAULT POWER DISSIPATION
CAPACITIVE LOAD
4
4
SWITCHING FREQUENCY
SYNC FREQUENCY RANGE
ISOLATION
MTBF (MIL-HDBK-217F)
V
H
– V
L
= 5V
Duty Cycle = 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
-
-
300
550
900
500
20
50
-
-
-
-
-
-
-
-
500
300
-
-
350
450
900
500
20
50
mV
PK
Sec
mV
PK
Sec
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.
DVHV2800S-5.0
3
DVHV2800S 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)
ESD Rating per MIL-PRF-38534
50 V
DC
80 Volts
15 Watts
6 Watts
3A
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight (Maximum) (Un-Flanged / Flanged)
+15°C
-65°C to +150°C
270°C
(52 / 55) 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
4
Conditions
DVHV285R2S
Min
15
-
-
-
-
0
9.0
12.0
11.0
Typ
28
-
-
-
-
-
11.0
-
-
5.20
5.20
-
-
-
-
-
-
-
-
-
475
-
-
413
Max
50
80
6
90
50
1.5
13.0
14.8
14.5
5.252
5.278
15
3.0
30
20
50
-
11
11
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
F
kHz
kHz
MΩ
kHrs
Inhibit Pin Open Circuit Voltage
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
T
CASE
= 25°C
T
CASE
= -55°C to +125°C
5.148
5.122
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
Short Circuit
-
-
-
73
-
-
-
400
LOAD FAULT POWER DISSIPATION
CAPACITIVE LOAD
4
4
SWITCHING FREQUENCY
SYNC FREQUENCY RANGE
ISOLATION
MTBF (MIL-HDBK-217F)
V
H
– V
L
= 5V
Duty Cycle = 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
-
-
300
500
600
500
20
25
mV
PK
Sec
mV
PK
Sec
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.
DVHV2800S-5.0
4
DVHV2800S Series
BLOCK DIAGRAM
PIN 1
28V IN
L1
C1
IN COM
PIN 10
Q1
MAGNETIC
FEEDBACK
Rs1
VOLTAGE AND
CURRENT
AMPLIFIERS
TRIM
PIN 3
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
+V OUT
5
+
-
2
INH
10
IN COM OUT COM
4
LOAD
Figure 3
DVHV2800S-5.0
5
