DVHV2800T Series
VPT Inc.
2801 Commerce Street
Blacksburg, VA 24060
Sales Info: (425) 337-2482 FAX: (603) 297-1160
WEB: http://www.vpt-inc.com
E-mail: mbosmann@worldnet.att.net
Description
Features
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Very low output noise
High Reliability
Wide input voltage range : 15 to 50 Volts /
MIL-STD-704
Up to 15 Watts output power
Patented, fault tolerant feedback circuit
NO optoisolator
Undervoltage Lockout
Standard Pinout
High input transient voltage : 80 Volts for 1 Sec
MIL-STD-704A
Radiation hardened version available
Precision solder sealed hermetic package
Custom Versions Available
Environmental Screening Available
Meets MIL-STD-461C and MIL-STD-461D EMC
requirements when used with a DVMC28 EMI filter
The DVHV series of hybrid DC to DC converters is able
to operate at the full military (-55
°C
to +125
°C)
temperature range with no power derating. Unique to the
DVHV series is a PATENTED magnetic feedback circuit
that is fault tolerant and had no adverse affects when
exposed to radiation. Operating at a nominal fixed
frequency of 450kHz, the regulated and isolated units
utilize a well-controlled undervoltage lock out circuitry
to eliminate slow start-up performance.
Block Diagram
1
DVHV2800T Series
Specifications
Absolute Maximum Ratings
Input Voltage (Continuous)
Input Voltage (Transient)
Output Power
Power Dissipation, Full Load, T
CASE
= +125°C
Junction Temperature rise to case
Storage Temperature
Lead Solder Temperature for 10 seconds
Weight
Conditions
-55
°
C
≤
T
C
≤
125
°
C,
° ≤ ≤
°
V
IN
= 28 V
DC
±
5%, Full Load
1
±
Unless otherwise specified
50 Vdc
80 V (1sec)
15 Watts
9 Watts
+15°C
-65°C to +150°C
270°C
50 grams
T
case
= -55°C to +125°C, V
in
= +28V
±5%,
Full Load unless otherwise specified
DVHV28512T
Typ
Max
28
7.0
90
20
0
9.0
11.50
11.00
Tcase = 25°C
-55°C
≤
Tcase
≤
+125°C
4.95
11.88
11.76
4.85
11.64
11.52
0
0
0
0
0
11.0
50
80
12
150
50
1.5
13.0
15.0
14.5
5.05
12.12
12.24
5.15
12.36
12.48
15
10.0
5.0
2.0
0.42
30
30
20
20
200
20
20
200
450
10
9
500
550
700
17
311
311
DVHV28515T
Typ
Max
28
7.0
90
20
0
9.0
11.5
11.0
4.95
14.85
14.70
4.85
14.55
14.40
0
0
0
0
0
11.0
50
80
12
150
50
1.5
13.0
15.0
14.5
5.05
15.15
15.30
5.15
15.45
15.60
15
10.0
5.0
2.0
0.33
35
35
20
20
200
20
20
200
450
10
9
500
550
700
17
Parameter
Static
INPUT
Voltage
Current
5
Ripple Current
Inhibit Pin Input
Inhibit Pin Open Cicuit Voltage
UVLO Turn On
UVLO Turn Off
OUTPUT
Voltage
1
V
MAIN
V
AUX+
V
AUX-
V
MAIN
V
AUX+
V
AUX-
Power
2,5
TOTAL
V
MAIN
V
AUX±
Current
2,5
V
MAIN
V
AUX±
Ripple Voltage
V
MAIN
V
AUX±
Line Regulation
V
MAIN
V
AUX+
V
AUX-
Load Regulation
V
MAIN
V
AUX+
V
AUX-
Cross Regulation
3
EFFICIENCY
LOAD FAULT
POWER DISSIPATION
CAPACITIVE LOAD
SWITCHING FREQUENCY
SYNC FREQUENCY RANGE
ISOLATION
THERMAL RESISTANCE
MTBF
Table continued on next page.
Min
15
Min
15
Units
V
mA
mA
mA
P-P
V
V
V
V
V
V
V
V
V
V
W
W
W
A
A
mV
P-P
mV
P-P
mV
mV
mV
mV
mV
mV
%
W
W
µF
kHz
MΩ
°C/W
kHrs
Continuous
Transient up to 1 second
Inhibited
No Load
Full Load; 20Hz to 10MHz
5.00
12.0
12.0
5.00
12.0
12.0
5.00
15.0
15.0
5.00
15.0
15.0
Full Load
1
, 20Hz to 10MHz
Vin = 16V to 40V
Vin = 16V to 40V
No Load to Full Load
No Load to Full Load
Tc=25°C
Overload
Short Circuit
76
5
5
10
10
10
10
10
10
350
80
76
10
10
10
10
10
10
10
10
350
80
V
H
-V
L
=5V Duty Cycle: 20%-80%
Case to Ambient (θ
CA
)
MIL-HDBK217F, AIF@Tc=55°C
400
500
100
450
400
500
100
450
2
DVHV2800T Series
Specifications
T
case
= -55°C to +125°C, V
in
= +28V
±5%,
Full Load
1
unless otherwise specified
Conditions
-55
°
C
≤
T
C
≤
125
°
C,
° ≤ ≤
°
V
IN
= 28 V
DC
±
5%, Full Load
1
±
Unless otherwise specified
Parameter
Dynamic
LOAD STEP
Output Transient
Recovery
4
LINE STEP
Output Transient
Recovery
4
TURN ON
Delay
4
Overshoot
Min
DVHV28512T
Typ
Max
150
300
200
300
500
300
500
300
7.5
0
7.5
0
250
500
300
500
800
600
800
600
10
50
10
120
Min
DVHV28515T
Typ
Max
150
300
200
300
500
300
500
300
7.5
0
7.5
0
250
500
300
500
800
600
800
600
10
50
10
150
Units
mV
PK
µsec
mV
PK
µsec
mV
PK
µsec
mV
PK
µsec
msec
mV
PK
msec
mV
PK
V
MAIN
V
AUX±
V
MAIN
V
AUX±
V
MAIN
V
AUX±
Half Load to Full Load
Vin = 16V to 40V
Vin = 0V to 28V
NOTES:
1. Main output power is 10W, each auxiliary output power is 3.5W.
2. Total main output power is 10W. Total auxiliary output power is 5W and up to 70% can be drawn from any one of the two auxiliary outputs.
3. Vaux+ at 30% load and Vaux- at 70% full load.
4. Time for output voltage to settle within 1% of its nominal value.
5. Derate linearly to 0 at 135°C.
3
DVHV2800T Series
DVHV2800T Without EMI filter
Figure 1
DVHV2800T With EMI filter
Figure 2
4
DVHV2800T Series
Connection Diagram
Figure 3
Internal Inhibit Circuit and Recommended Drive
(Shown with optional capacitor for turn on delay)
Figure 4
Isolated Inhibit Drive
(Shown with optional capacitor for turn on delay)
Figure 5
Converter with EMI Filter Hookup Diagram
Figure 6
5
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