VPT30-2800S Series
HIGH RELIABILITY
COTS DC-DC CONVERTERS
DESCRIPTION
The VPT30 series of isolated COTS DC-DC
converters is a cost effective solution for many
demanding high reliability applications. A wide input
voltage range accommodates nominal 28V inputs
including avionics, mobile, ground systems, and
other applications. Low input and output ripple, fixed
operating frequency, and companion EMI filters
simplify system design and compliance. A proven
design heritage, no optoisolators and a rugged all
metal package ensure long term reliability.
The VPT30 series is intended for harsh
environments including severe vibration, shock and
temperature cycling. Testing is to JESD22, MIL-STD-
810, and MIL-STD-883.
These converters are designed and manufactured in
the USA in a facility certified to ISO9001, J-STD-001
and IPC-A-610.
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 at Low Cost
Up to 30 Watts Maximum Output Power
Wide Input Voltage Range: 15 to 50 Volts per
MIL-STD-704 and MIL-STD-1275
High Input Transient Voltage: 80 Volts for 1 sec
per MIL-STD-704A
Input Undervoltage Lockout
Fixed Frequency
Output Voltage Trim (+10% / -20% )
Remote Sense
Frequency Synchronization
Output Soft Start
Current Limit Protection
Short Circuit Protection
Magnetic Feedback, no Optoisolators
Wide Temperature Range, -55°C to 100°C
Internally Conformal Coated
Six Sided Non-Hermetic Rugged Metal
Enclosure
Meets MIL-STD-461C/D/E Conducted
Emissions Requirements When Used With a
VPTF series EMI Filter
Figure 1
– VPT30-2800S Converter
(Not
To Scale)
DS90207-2.0
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
VPT30-2800S Series
SPECIFICATIONS
(T
CASE
= -55°C to +100°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
= +100°C)
50 V
DC
80 Volts
30 Watts
14 Watts
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight
(Maximum)
VPT30-283R3S
Min
15
-
-
-
-
0
4
+17°C
-55°C to +125°C
300°C
48 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
Conditions
VPT30-2805S
Max
50
80
6
80
75
1.5
13.0
14.8
14.5
3.35
3.38
25
7.6
50
10
10
-
16
16
1000
550
600
-
-
Typ
28
-
4
50
30
-
11.0
-
-
3.30
3.30
-
-
20
1
1
75
-
-
-
500
-
-
418
Min
15
-
-
-
-
0
9.0
12.0
11.0
4.92
4.87
0
0
-
-
-
74
-
-
-
400
500
100
-
Typ
28
-
4
50
30
-
11.0
-
-
5.00
5.00
-
-
15
1
1
81
-
-
-
500
-
-
418
Max
50
80
6
80
75
1.5
13.0
14.8
14.5
5.08
5.13
30
6.0
50
10
10
-
16
16
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
9.0
12.0
11.0
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
T
CASE
= 25°C
T
CASE
= -55°C to +100°C
3.25
3.21
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
4
-
-
-
70
-
-
-
400
LOAD FAULT POWER DISSIPATION
CAPACITIVE LOAD
4
Short Circuit
SWITCHING FREQUENCY
SYNC FREQUENCY RANGE
ISOLATION
MTBF (MIL-HDBK-217F)
V
H
- V
L
= 5V, D = 20-80%
500 V
DC
GM @ 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
-
-
-
-
-
-
200
300
350
400
10
0
400
500
600
600
20
15
-
-
-
-
-
-
200
300
350
400
10
0
500
500
600
600
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 110°C.
2. Time for output voltage to settle within 1% of its nominal value.
4. Verified by qualification testing.
DS90207-2.0
2
VPT30-2800S Series
SPECIFICATIONS
(T
CASE
= -55°C to +100°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
= +100°C)
50 V
DC
80 Volts
30 Watts
14 Watts
Junction Temperature Rise to Case
Storage Temperature
Lead Solder Temperature (10 seconds)
Weight
(Maximum)
VPT30-2812S
Min
15
-
-
-
-
0
4
+17°C
-55°C to +125°C
300°C
48 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
Conditions
VPT30-2815S
Max
50
80
6
80
75
1.5
13.0
14.8
14.5
12.18
12.30
30
2.5
50
10
10
-
14
14
500
550
600
-
-
Typ
28
-
4
50
30
-
11.0
-
-
12.0
12.0
-
-
10
1
1
83
-
-
-
500
-
-
418
Min
15
-
-
-
-
0
9.0
12.0
11.0
14.77
14.62
0
0
-
-
-
79
-
-
-
400
500
100
-
Typ
28
-
4
50
30
-
11.0
-
-
15.0
15.0
-
-
10
1
1
84
-
-
-
500
-
-
418
Max
50
80
6
80
75
1.5
13.0
14.8
14.5
15.23
15.38
30
2.0
50
10
10
-
14
14
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
9.0
12.0
11.0
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
T
CASE
= 25°C
T
CASE
= -55°C to +100°C
11.82
11.70
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
4
-
-
-
78
-
-
-
400
LOAD FAULT POWER DISSIPATION
CAPACITIVE LOAD
4
Short Circuit
SWITCHING FREQUENCY
SYNC FREQUENCY RANGE
ISOLATION
MTBF (MIL-HDBK-217F)
V
H
- V
L
= 5V, D = 20-80%
500 V
DC
GM @ 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
-
-
-
-
-
-
350
250
700
300
10
0
700
500
1100
500
20
50
-
-
-
-
-
-
350
250
700
300
10
0
700
500
1100
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 110°C.
2. Time for output voltage to settle within 1% of its nominal value.
4. Verified by qualification testing.
DS90207-2.0
3
VPT30-2800S Series
BLOCK DIAGRAM
Figure 2
CONNECTION DIAGRAM
Figure 3
(Shown with optional EMI filter)
DS90207-2.0
4
VPT30-2800S Series
CONNECTION DIAGRAMS
Figure 4
–Inhibit Circuit
(Shown with optional capacitor for turn-on delay)
Figure 5
– Output Voltage Trim Circuit
OUTPUT VOLTAGE TRIM
The output voltage can be trimmed down by connecting a resistor between the TRIM pin and the +V OUT pin,
or can be trimmed up by connecting a resistor between the TRIM pin and the OUT COM pin as shown in
Figure 5. The maximum trim range is +10% up and –20% down. The appropriate resistor values versus the
output voltage are given in the trim table below.
VPT30-283R3S
+V
OUT
(V)
3.60
3.55
3.50
3.45
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
2.95
2.90
R
TRIM
(Ω)
7.27k
89.2k
114k
155k
238k
487k
--
144k
61.9k
34.7k
21k
12.79k
7.33k
3.43k
498
VPT30-2805S
+V
OUT
(V)
5.5
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
4.3
4.2
4.1
4.0
R
TRIM
(Ω)
39.6k
52k
72.6k
113.9k
237k
--
232.5k
106.1k
64k
43k
30.4k
22k
16k
11.5k
8.0k
5.2k
VPT30-2812S
+V
OUT
(V)
13.2
13.0
12.8
12.6
12.4
12.2
12.0
11.8
11.6
11.4
11.2
11.0
10.8
10.6
10.4
10.2
10.0
9.8
9.6
R
TRIM
(Ω)
10.7k
14.8k
21k
31.3k
51.9k
114k
--
457k
218k
139k
99k
75.2k
59.4k
48k
39.5k
32.9k
27.6k
23.3k
19.7k
VPT30-2815S
+V
OUT
(V)
16.50
16.25
16.00
15.75
15.50
15.25
15.00
14.75
14.50
14.25
14.00
13.75
13.50
13.25
13.00
12.75
12.50
12.25
12.00
R
TRIM
(Ω)
6.5k
9.8k
14.8k
23k
39.6k
89k
--
482k
231k
147k
105k
80.2k
63.5k
51.6k
42.6k
35.6k
30k
25.5k
21.7k
DS90207-2.0
5
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