DVFL2800D Series
HIGH RELIABILITY HYBRID
DC-DC CONVERTERS
DESCRIPTION
The DVFL 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 DVFL 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 500 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 current sharing function allows a
maximum of five units to be connected in parallel to
boost the total output power to 5 times. 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
Parallel Up to 5 Units With Current Sharing
Output Voltage Trim Up +10% or Down –20%
Wide Input Voltage Range: 16 to 40 Volts per
MIL-STD-704
Up to 120 Watts Output Power
Fault Tolerant Magnetic Feedback Circuit
NO Use of Optoisolators
Undervoltage Lockout
Indefinite Short Circuit Protection
Current Limit Protection
Industry Standard Pinout
Input Transient Voltage: 50 Volts for 1 second
Precision Seam Welded Hermetic Package
High Power Density: > 80 W/in
3
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
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
– DVFL2800D DC-DC Converter
(Exact
marking may differ from that shown)
Sales Information:
Phone: (425) 353-3010
Fax: (425) 353-4030
E-mail: vptsales@vpt-inc.com
DVFL2800D-4.0
http://www.vpt-inc.com
1
DVFL2800D 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
1
Power Dissipation (Full Load, T
CASE
= +125°C)
ESD Rating per MIL-PRF-38543
Parameter
40 V
DC
50 Volts
120 Watts
40 Watts
1C
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight (Maximum) (No Pin Extensions)
+15°C
-65°C to +150°C
270°C
90 Grams
Conditions
DVFL2805D
Min
Typ
Max
Min
DVFL286R3D
Typ
Max
Units
STATIC
INPUT
4
Voltage
Current
Ripple Current
INH1 Pin Input
INH2 Pin Input
4
4
4
4
Continuous
Transient, 1 sec
Inhibited 1
Inhibited 2
No Load
Full Load , 20Hz to 10MHz
5
16
-
-
-
-
-
0
0
10.5
4
14.5
13.5
28
-
1
40
75
30
-
-
-
-
-
-
5.00
5.00
5.00
5.00
-
-
-
15
2
10
10
55
260
-
-
80
-
-
-
500
-
-
400
40
50
3
70
160
80
1.5
1
15
12
16
15.5
5.05
5.075
5.20
5.25
100
70
14
80
20
200
100
200
450
10
4
-
50
50
500
600
600
-
-
16
-
-
-
-
-
0
0
10.5
4
14.5
13.5
6.237
6.205
6.1
6.048
-
-
-
-
-
-
-
-
-
-20
2
76
-
-
-
425
500
100
-
28
-
1
40
75
35
-
-
-
-
-
-
6.3
6.3
6.3
6.3
-
-
-
20
2
10
10
70
300
-
-
81
-
-
-
500
-
-
400
40
50
3
70
160
80
1.5
1
15
12
16
15.5
6.363
6.395
6.5
6.552
100
70
11.1
80
20
200
120
200
450
10
4
-
50
50
500
600
600
-
-
V
V
mA
mA
mA
mA
p-p
V
V
V
V
V
V
V
V
V
V
W
W
A
mV
p-p
mV
mV
mV
mV
mV
%
V
%
W
W
F
kHz
kHz
MΩ
kHrs
INH1 Pin Open Circuit Voltage
INH2 Pin Open Circuit Voltage
UVLO Turn On
UVLO Turn Off
OUTPUT
5
Voltage
4
+V
OUT
+V
OUT
-V
OUT
-V
OUT
Power
3,6
T
CASE
= 25°C
T
CASE
= -55°C to +125°C
T
CASE
= 25°C
T
CASE
= -55°C to +125°C
Either Output
Either Output
Full Load , 20Hz to 10MHz
V
IN
= 16V to 40V
V
IN
= 16V to 40V
No Load to Full Load
No Load to Full Load
5
5
5
4.95
4.925
4.80
4.75
-
-
-
-
-
-
-
-
-
-20
2
73
-
-
-
425
Total
±V
OUT
±V
OUT
±V
OUT
+V
OUT
-V
OUT
+V
OUT
-V
OUT
-V
OUT
4
Current
3,6
Ripple Voltage
Line Regulation
Load Regulation
Cross Regulation
Voltage Trim
Share Pin Voltage
EFFICIENCY
V1+ Load 30% - Load 70%
V2+ Load 70% - Load 30%
Full Load
Full Load
Overload
5
4
LOAD FAULT POWER DISSIPATION
CAPACITIVE LOAD
4
Short Circuit
SWITCHING FREQUENCY
SYNC FREQUENCY RANGE
ISOLATION
MTBF (MIL-HDBK-217F)
V
H
– V
L
= 5V
Duty Cycle = 20% - 80%
500 V
DC
, T
CASE
= 25°C
AIF @ T
C
= 55°C
500
100
-
DVFL2800D-4.0
2
DVFL2800D 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
1
Power Dissipation (Full Load, T
CASE
= +125°C)
ESD Rating per MIL-PRF-38543
40 V
DC
50 Volts
120 Watts
40 Watts
1C
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight (Maximum) (No Pin Extensions)
+15°C
-65°C to +150°C
270°C
90 Grams
Parameter
Conditions
DVFL2805D
Min
Typ
Max
Min
DVFL286R3D
Typ
Max
Units
DYNAMIC
Load Step Output Transient
Load Step Recovery
Line Step Recovery
Turn On Delay
Turn On Overshoot
2
4
±V
OUT
±V
OUT
±V
OUT
Half Load to Full Load
V
IN
= 16V to 40V
V
IN
= 0V to 28V
-
-
-
-
-
-
130
200
300
300
5
0
400
500
600
500
20
25
-
-
-
-
-
-
150
200
250
400
5
0
300
500
600
700
20
25
mV
PK
Sec
mV
PK
Sec
mSec
mV
PK
Line Step Output Transient
2, 4
Notes:
1.
2.
3.
4.
5.
6.
Dependant on output voltage.
Time for output voltage to settle within 1% of its nominal value.
Derate linearly to 0 at 135°C.
Verified by qualification testing.
Half load at +V
OUT
and half load at –V
OUT
.
Up to 70% of the total power or current can be drawn from any one of the two outputs.
DVFL2800D-4.0
3
DVFL2800D 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
1
Power Dissipation (Full Load, T
CASE
= +125°C)
ESD Rating per MIL-PRF-38543
Parameter
40 V
DC
50 Volts
120 Watts
40 Watts
1C
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight (Maximum) (No Pin Extensions)
+15°C
-65°C to +150°C
270°C
90 Grams
Conditions
DVFL289R5D
Min
Typ
Max
Min
DVFL2812D
Typ
Max
Units
STATIC
INPUT
4
Voltage
Current
Ripple Current
INH1 Pin Input
INH2 Pin Input
4
4
4
4
Continuous
Transient, 1 sec
Inhibited 1
Inhibited 2
No Load
Full Load , 20Hz to 10MHz
5
16
-
-
-
-
-
0
0
10.5
4
14.5
13.5
28
-
1
40
80
30
-
-
-
-
-
-
9.5
9.5
9.5
9.5
-
-
-
25
2
10
2
45
220
-
-
83
-
-
-
500
-
-
400
40
50
3
70
160
80
1.5
1
15
12
16
15.5
9.595
9.643
9.7
9.88
100
70
7.4
80
20
200
100
200
450
10
4
-
50
50
500
600
600
-
-
16
-
-
-
-
-
0
0
10.5
4
14.5
13.5
11.88
11.82
11.80
11.52
-
-
-
-
-
-
-
-
-
-20
2
80
-
-
-
425
500
100
-
28
-
1
40
90
35
-
-
-
-
-
-
12.00
12.00
12.00
12.00
-
-
-
25
2
10
2
40
220
-
-
86
-
-
-
500
-
-
400
40
50
3
70
160
80
1.5
1
15
12
16
15.5
12.12
12.18
12.20
12.48
110
77
6.4
80
20
200
120
200
450
10
4
-
50
50
500
600
600
-
-
V
V
mA
mA
mA
mA
p-p
V
V
V
V
V
V
V
V
V
V
W
W
A
mV
p-p
mV
mV
mV
mV
mV
%
V
%
W
W
F
kHz
kHz
MΩ
kHrs
INH1 Pin Open Circuit Voltage
INH2 Pin Open Circuit Voltage
UVLO Turn On
UVLO Turn Off
OUTPUT
5
Voltage
4
+V
OUT
+V
OUT
-V
OUT
-V
OUT
Power
3,6
T
CASE
= 25°C
T
CASE
= -55°C to +125°C
T
CASE
= 25°C
T
CASE
= -55°C to +125°C
Either Output
Either Output
Full Load , 20Hz to 10MHz
V
IN
= 16V to 40V
V
IN
= 16V to 40V
No Load to Full Load
No Load to Full Load
5
5
5
9.405
9.357
9.3
9.12
-
-
-
-
-
-
-
-
-
-20
2
79
-
-
-
425
Total
±V
OUT
±V
OUT
±V
OUT
+V
OUT
-V
OUT
+V
OUT
-V
OUT
-V
OUT
4
Current
3,6
Ripple Voltage
Line Regulation
Load Regulation
Cross Regulation
Voltage Trim
Share Pin Voltage
EFFICIENCY
V1+ Load 30% - Load 70%
V2+ Load 70% - Load 30%
Full Load
Full Load
Overload
5
4
LOAD FAULT POWER DISSIPATION
CAPACITIVE LOAD
4
Short Circuit
SWITCHING FREQUENCY
SYNC FREQUENCY RANGE
ISOLATION
MTBF (MIL-HDBK-217F)
V
H
– V
L
= 5V
Duty Cycle = 20% - 80%
500 V
DC
, T
CASE
= 25°C
AIF @ T
C
= 55°C
500
100
-
DVFL2800D-4.0
4
DVFL2800D 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
1
Power Dissipation (Full Load, T
CASE
= +125°C)
ESD Rating per MIL-PRF-38543
40 V
DC
50 Volts
120 Watts
40 Watts
1C
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight (Maximum) (No Pin Extensions)
+15°C
-65°C to +150°C
270°C
90 Grams
Parameter
Conditions
DVFL289R5D
Min
Typ
Max
Min
DVFL2812D
Typ
Max
Units
DYNAMIC
Load Step Output Transient
Load Step Recovery
Line Step Recovery
Turn On Delay
Turn On Overshoot
2
4
±V
OUT
±V
OUT
±V
OUT
Half Load to Full Load
V
IN
= 16V to 40V
V
IN
= 0V to 28V
-
-
-
-
-
-
400
250
550
300
5
0
700
500
1000
600
20
25
-
-
-
-
-
-
260
140
600
300
5
0
500
500
1200
500
20
50
mV
PK
Sec
mV
PK
Sec
mSec
mV
PK
Line Step Output Transient
2, 4
Notes:
1.
2.
3.
4.
5.
6.
Dependant on output voltage.
Time for output voltage to settle within 1% of its nominal value.
Derate linearly to 0 at 135°C.
Verified by qualification testing.
Half load at +V
OUT
and half load at –V
OUT
.
Up to 70% of the total power or current can be drawn from any one of the two outputs.
DVFL2800D-4.0
5
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