DVSA2800S Series
1X001DSF
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 DVSA 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 DVSA series is a magnetic feedback circuit
that is radiation immune. Operating at a nominal
fixed frequency of 450 kHz, these regulated, isolated
units utilize well controlled undervoltage lockout
circuitry to eliminate slow start-up problems.
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
Wide Input Voltage Range: 15 to 50 Volts per
MIL-STD-704
Up to 6 Watts Output Power
Radiation Immune 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
Radiation Hardened Version Available
Precision Projection Welded Hermetic Package
High Power Density: > 19 W/in
3
Custom Versions Available
Additional Environmental Screening Available
Meets MIL-STD-461C and MIL-STD-461D EMC
Requirements When Used With a DVMA28 EMI
Filter
MIL-PRF-38534 Element Evaluated
Components
Figure 1
DVSA2800S DC-DC Converter
(Not To Scale)
DVSA2800S Series
1X001DSF
2
SPECIFICATIONS
(T
CASE
= -55C to +125C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
50 V
DC
Junction Temperature Rise to Case
+10C
Input Voltage (Transient, 1 second)
80 Volts
Storage Temperature
-65C to +150C
Output Power
1
6 Watts
Lead Solder Temperature (10 seconds)
270C
Power Dissipation (Full Load, T
CASE
= +125C)
2.7 Watts
Weight (Maximum)
15 Grams
DVSA283R3S DVSA2805S
Parameter Conditions
Min Typ Max Min Typ Max
Units
STATIC
Continuous
15 28 50 15 28 50 V
INPUT
Voltage
4
Transient,
1
sec
- - 80 - - 80 V
Inhibited
- - 6 - - 6
mA
Current
No
Load
- - 60 - - 60
mA
Ripple Current
Full Load, 20Hz to 10MHz
-
-
50
-
-
50
mA
p-p
Inhibit Pin Input
4
0 - 1.5 0 - 1.5
V
Inhibit Pin Open Circuit Voltage
4
9.0 11.0 13.0 9.0 11.0 13.0 V
UVLO Turn On
12.0
-
14.8
12.0
-
14.8
V
UVLO Turn Off
4
11.0 - 14.5
11.0 - 14.5 V
V
OUT
T
CASE
=
25C
3.267 3.30 3.333 4.95 5.00 5.05 V
OUTPUT
Voltage
V
OUT
T
CASE
=
-55C
to
+125C 3.25 3.30 3.35 4.925 5.00 5.075 V
Power
3
0 - 4 0 - 5 W
Current
3
I
OUT
0 -
1.21
0 - 1.0
A
Ripple Voltage
V
OUT
Full Load, 20Hz to 10MHz
-
-
30
-
-
30
mV
p-p
Line Regulation
V
OUT
V
IN
= 15V to 50V
-
-
15
-
-
15
mV
Load Regulation
V
OUT
No Load to Full Load
-
-
50
-
-
50
mV
EFFICIENCY
62 66 - 65 70 - %
Overload
4
- - 3.3 - - 3.3
W
LOAD FAULT POWER DISSIPATION
Short
Circuit
- - 3 - - 3 W
CAPACITIVE LOAD
4
- - 1000 - - 1000
F
SWITCHING
FREQUENCY
350 450 500 350 450 500 kHz
ISOLATION 500
V
DC
100 - - 100 - - M
MTBF (MIL-HDBK-217F)
AIF @ T
C
=
55C
- 457 - - 457 - kHrs
DYNAMIC
Load Step Output Transient
V
OUT
- 150
300 - 250
500
mV
PK
Load Step Recovery
2
Half Load to Full Load
- 450
700 - 450
700
Sec
Line Step Output Transient
4
V
OUT
- 250
500 - 350
700
mV
PK
Line Step Recovery
2, 4
V
IN
= 16V to 40V
- 600
1200 - 600
1200
Sec
Turn On Delay
V
OUT
- 10 20 - 10 20
mSec
Turn On Overshoot
V
IN
= 0V to 28V
- 0 15 - 0 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.
DVSA2800S Series
1X001DSF
3
SPECIFICATIONS
(T
CASE
= -55C to +125C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
50 V
DC
Junction Temperature Rise to Case
+10C
Input Voltage (Transient, 1 second)
80 Volts
Storage Temperature
-65C to +150C
Output Power
1
6 Watts
Lead Solder Temperature (10 seconds)
270C
Power Dissipation (Full Load, T
CASE
= +125C)
2.7 Watts
Weight (Maximum)
15 Grams
DVSA2812S DVSA2815S
Parameter Conditions
Min Typ Max Min Typ Max
Units
STATIC
Continuous
15 28 50 15 28 50 V
INPUT
Voltage
4
Transient,
1
sec
- - 80 - - 80 V
Inhibited
- - 6 - - 6
mA
Current
No
Load
- - 60 - - 60
mA
Ripple Current
Full Load, 20Hz to 10MHz
-
-
50
-
-
50
mA
p-p
Inhibit Pin Input
4
0 - 1.5 0 - 1.5
V
Inhibit Pin Open Circuit Voltage
4
9.0 11.0 13.0 9.0 11.0 13.0 V
UVLO Turn On
12.0
-
14.8
12.0
-
14.8
V
UVLO Turn Off
4
11.0 - 14.5
11.0 - 14.5 V
V
OUT
T
CASE
=
25C
11.88 12.0 12.12 14.85 15.0 15.15 V
OUTPUT
Voltage
V
OUT
T
CASE
= -55C to +125C
11.82
12.0
12.18
14.775
15.0
15.225
V
Power
3
0 - 6 0 - 6 W
Current
3
I
OUT
0 - 0.5 0 - 0.4
A
Ripple Voltage
V
OUT
Full Load, 20Hz to 10MHz
-
-
30
-
-
30
mV
p-p
Line Regulation
V
OUT
V
IN
= 15V to 50V
-
-
15
-
-
15
mV
Load Regulation
V
OUT
No Load to Full Load
-
-
50
-
-
50
mV
EFFICIENCY
71 75 - 72 76 - %
Overload
4
- - 3 - - 3 W
LOAD FAULT POWER DISSIPATION
Short
Circuit
- - 3 - - 3 W
CAPACITIVE LOAD
4
- - 500 - - 500
F
SWITCHING
FREQUENCY
350 450 500 350 450 500 kHz
ISOLATION 500
V
DC
100 - - 100 - - M
MTBF (MIL-HDBK-217F)
AIF @ T
C
=
55C
- 457 - - 457 - kHrs
DYNAMIC
Load Step Output Transient
V
OUT
- 300
700 - 400
700
mV
PK
Load Step Recovery
2
Half Load to Full Load
- 200
400 - 200
400
Sec
Line Step Output Transient
4
V
OUT
- 700
1200 - 700
1300
mV
PK
Line Step Recovery
2, 4
V
IN
= 16V to 40V
- 200
600 - 200
600
Sec
Turn On Delay
V
OUT
- 10 20 - 10 20
mSec
Turn On Overshoot
V
IN
= 0V to 28V
- 0 50 - 0 50
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.
DVSA2800S Series
1X001DSF
4
SPECIFICATIONS
(T
CASE
= -55C to +125C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
50 V
DC
Junction Temperature Rise to Case
+10C
Input Voltage (Transient, 1 second)
80 Volts
Storage Temperature
-65C to +150C
Output Power
1
6 Watts
Lead Solder Temperature (10 seconds)
270C
Power Dissipation (Full Load, T
CASE
= +125C)
2.7 Watts
Weight (Maximum)
15 Grams
DVSA285R2S
Parameter Conditions
Min Typ Max
Units
STATIC
Continuous
15 28 50 V
INPUT
Voltage
4
Transient, 1 sec
-
-
80
V
Inhibited -
-
6
mA
Current
No Load
-
-
60
mA
Ripple Current
Full Load, 20Hz to 10MHz
-
-
50
mA
p-p
Inhibit Pin Input
4
0
-
1.5
V
Inhibit Pin Open Circuit Voltage
4
9.0
11.0
13.0
V
UVLO Turn On
12.0
-
14.8
V
UVLO Turn Off
4
11.0
-
14.5
V
V
OUT
T
CASE
= 25C
5.148
5.20
5.252
V
OUTPUT
Voltage
V
OUT
T
CASE
= -55C to +125C
5.122
5.20
5.278
V
Power
3
0
-
5.2
W
Current
3
I
OUT
0
-
1.0
A
Ripple Voltage
V
OUT
Full Load, 20Hz to 10MHz
-
-
30
mV
p-p
Line Regulation
V
OUT
V
IN
= 15V to 50V
-
-
15
mV
Load Regulation
V
OUT
No Load to Full Load
-
-
50
mV
EFFICIENCY
65
70
-
%
Overload
4
- - 3.3
W
LOAD FAULT POWER DISSIPATION
Short Circuit
-
-
3
W
CAPACITIVE LOAD
4
-
-
1000
F
SWITCHING
FREQUENCY
350 450 500 kHz
ISOLATION 500
V
DC
100 - - M
MTBF (MIL-HDBK-217F)
AIF @ T
C
= 55C
-
457
-
kHrs
DYNAMIC
Load Step Output Transient
V
OUT
- 250
500
mV
PK
Load Step Recovery
2
Half Load to Full Load
- 450
700
Sec
Line Step Output Transient
4
V
OUT
- 350
700
mV
PK
Line Step Recovery
2, 4
V
IN
= 16V to 40V
- 600
1200
Sec
Turn On Delay
V
OUT
- 10 20
mSec
Turn On Overshoot
V
IN
= 0V to 28V
- 0 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.
DVSA2800S Series
1X001DSF
5
BLOCK DIAGRAM
UNDER
VOLTAGE
SHUTDOWN
PRIMARY
HOUSEKEEPING
SUPPLY
PWM
CONTROL
VOLTAGE AND
CURRENT
AMPLIFIERS
SECONDARY
HOUSEKEEPING
SUPPLY
PIN 6
28V IN
PIN 7
IN COM
L1
C1
Q1
Rs1
T1
D1
C2
Rs2
+V OUT
PIN 1
PIN 2
OUT COM
INH
PIN 5
FEEDBACK
MAGNETIC
Figure 2
CONNECTION DIAGRAM
7
IN COM
5
INH
6
28V IN
1
+V OUT
2
OUT COM
LOAD
+
-
28 Vdc
Figure 3
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