DVST2800T Series
90054DSD
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
DC-DC CONVERTERS
DESCRIPTION
The DVST series of high reliability DC-DC converters
contains internal EMI filtering and meets MIL-STD-
461C and MIL-STD-461D for conducted emissions,
providing a one piece COTS solution for power
conversion applications. The DVST series is
operable over a wide (-55C to +100C) temperature
range with no power derating. Unique to the DVST
series is a magnetic feedback circuit that is radiation
immune. The three low noise outputs are fully
isolated from each other, allowing for maximum
flexibility in system design.
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
Up to 30 Watts Output Power
Three Fully Isolated Outputs
Wide Input Voltage Range: 15 to 50 Volts per
MIL-STD-704 with 80 Volt Transient for 1 sec
Internal Filter Meets MIL-STD-461C and MIL-
STD-461D Conducted Emissions Requirements
NO Use of Optoisolators
Undervoltage
Lockout
Indefinite Short Circuit Protection
Current Limit Protection
Low
Output
Noise
Custom Versions Available
Low Profile (0.380 inches) Package
Military Environmental Screening Available
Figure 1
DVST2800T DC-DC Converter
(Not To Scale)
DVST2800T Series
90054DSD
2
SPECIFICATIONS
(T
CASE
= -55C to +100C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
50 V
DC
Operating Case Temperature
-55C to +100C
Input Voltage (Transient, 1 second)
80 Volts
Storage Temperature
-55C to +125C
Output Power
1
30 Watts
Lead Solder Temperature (10 seconds)
270C
Power Dissipation (Full Load, T
CASE
= +100C)
15 Watts
Weight (Maximum)
100 Grams
INPUT
DVST2800T
Parameter Conditions
Min Typ Max
Units
STATIC
Continuous
15 28 50 V
INPUT
Voltage
Transient, 1 sec
80
V
Inhibited
1.6
5.0
mA
Current
No Load
65
100
mA
Inhibit Pin Input
0
1.5
V
Inhibit Pin Open Circuit Voltage
11.0
14.0
V
UVLO Turn On
14.9
V
UVLO Turn Off
11.8
V
SWITCHING
FREQUENCY
225 325
kHz
ISOLATION Input / Output / Case
500 V
DC
100 M
MAIN OUTPUT
DVST283R3xxyyT DVST285xxyyT
Parameter Conditions
Min Typ Max Min Typ Max
Units
STATIC
V
OUT
T
CASE
=
25C
3.26 3.30 3.34 4.95 5.00 5.05 V
OUTPUT
Voltage
V
OUT
T
CASE
=
-55C
to
+100C 3.23 3.30 3.37 4.90 5.00 5.10 V
Power
2
0 15 0 20
W
Current
2
V
OUT
0 4.5
0 4.0
A
Ripple Voltage
V
OUT
Full Load, 20Hz to 10MHz
20
50
20
50
mV
p-p
Line Regulation
V
OUT
V
IN
= 15V to 50V
5
20
5
20
mV
Load Regulation
V
OUT
No Load to Full Load
10
30
10
30
mV
EFFICIENCY
73 76 %
CAPACITIVE LOAD
1000 1000
F
DYNAMIC
Load Step Output Transient
V
OUT
200
400 200
400
mV
PK
Load Step Recovery
3
Half Load to Full Load
200
400 200
400
Sec
Line Step Output Transient
V
OUT
400
600 400
600
mV
PK
Line Step Recovery
3
V
IN
= 15V to 50V
400
600 400
600
Sec
Turn On Delay
V
OUT
15 20 15 20
mSec
Turn On Overshoot
V
IN
= 0V to 28V
0 30 0 50
mV
PK
DVST2800T Series
90054DSD
3
SPECIFICATIONS
(T
CASE
= -55C to +100C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
50 V
DC
Operating Case Temperature
-55C to +100C
Input Voltage (Transient, 1 second)
80 Volts
Storage Temperature
-55C to +125C
Output Power
1
30 Watts
Lead Solder Temperature (10 seconds)
270C
Power Dissipation (Full Load, T
CASE
= +100C)
15 Watts
Weight (Maximum)
100 Grams
MAIN OUTPUT
DVST281R8xxyyT DVST286R25xxyyT
Parameter Conditions
Min Typ Max Min Typ Max
Units
STATIC
V
OUT
T
CASE
=
25C
1.78 1.80 1.82 6.19 6.25 6.31 V
OUTPUT
Voltage
V
OUT
T
CASE
=
-55C
to
+100C 1.76 1.80 1.84 6.12 6.25 6.38 V
Power
2
0
13.5
0 20
W
Current
2
V
OUT
0 7.5
0 3.2
A
Ripple Voltage
V
OUT
Full Load, 20Hz to 10MHz
20
75
20
50
mV
p-p
Line Regulation
V
OUT
V
IN
= 15V to 50V
5
20
5
20
mV
Load Regulation
V
OUT
No Load to Full Load
10
30
10
30
mV
EFFICIENCY
66 76 %
CAPACITIVE LOAD
1000 1000
F
DYNAMIC
Load Step Output Transient
V
OUT
200
400 200
400
mV
PK
Load Step Recovery
3
Half Load to Full Load
500
750 200
400
Sec
Line Step Output Transient
V
OUT
400
600 400
600
mV
PK
Line Step Recovery
3
V
IN
= 15V to 50V
400
750 400
600
Sec
Turn On Delay
V
OUT
15 20 15 20
mSec
Turn On Overshoot
V
IN
= 0V to 28V
0 20 0 50
mV
PK
DVST2800T Series
90054DSD
4
SPECIFICATIONS
(T
CASE
= -55C to +100C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
50 V
DC
Operating Case Temperature
-55C to +100C
Input Voltage (Transient, 1 second)
80 Volts
Storage Temperature
-55C to +125C
Output Power
1
30 Watts
Lead Solder Temperature (10 seconds)
270C
Power Dissipation (Full Load, T
CASE
= +100C)
15 Watts
Weight (Maximum)
100 Grams
MAIN OUTPUT
DVST2812xxyyT
Parameter Conditions
Min Typ Max
Units
STATIC
V
OUT
T
CASE
= 25C
11.88
12.00
12.12
V
OUTPUT
Voltage
V
OUT
T
CASE
= -55C to +100C
11.76
12.00
12.24
V
Power
2
20
W
Current
2
V
OUT
1.67
A
Ripple Voltage
V
OUT
Full Load, 20Hz to 10MHz
50
mV
p-p
Line Regulation
V
OUT
V
IN
= 15V to 50V
50
mV
Load Regulation
V
OUT
No Load to Full Load
50
mV
EFFICIENCY
76 %
CAPACITIVE LOAD
500
F
DYNAMIC
Load Step Output Transient
V
OUT
200
400
mV
PK
Load Step Recovery
3
Half Load to Full Load
200
400
Sec
Line Step Output Transient
V
OUT
400
600
mV
PK
Line Step Recovery
3
V
IN
= 15V to 50V
200
600
Sec
Turn On Delay
V
OUT
15 20
mSec
Turn On Overshoot
V
IN
= 0V to 28V
0 50
mV
PK
DVST2800T Series
90054DSD
5
SPECIFICATIONS
(T
CASE
= -55C to +100C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
50 V
DC
Operating Case Temperature
-55C to +100C
Input Voltage (Transient, 1 second)
80 Volts
Storage Temperature
-55C to +125C
Output Power
1
30 Watts
Lead Solder Temperature (10 seconds)
270C
Power Dissipation (Full Load, T
CASE
= +100C)
15 Watts
Weight (Maximum)
100 Grams
AUXILIARY OUTPUT
DVST28x12yyT DVST28x15yyT
Parameter Conditions
Min Typ Max Min Typ Max
Units
STATIC
V
OUT
T
CASE
=
25C
11.76 12.00 12.24 14.70 15.00 15.30 V
OUTPUT
Voltage
V
OUT
T
CASE
=
-55C
to
+100C 11.64 12.00 12.36 14.55 15.00 15.45 V
Power
2
0 5 0 5 W
Current
2
V
OUT
0
0.42
0
0.33
A
Ripple Voltage
V
OUT
Full Load, 20Hz to 10MHz
25
50
25
50
mV
p-p
Line Regulation
V
OUT
V
IN
= 15V to 50V
5
20
5
20
mV
Load Regulation
V
OUT
No Load to Full Load
10
50
10
50
mV
CAPACITIVE LOAD
500 500
F
DYNAMIC
Load Step Output Transient
V
OUT
200
400 200
400
mV
PK
Load Step Recovery
3
Half Load to Full Load
100
200 100
200
Sec
Line Step Output Transient
V
OUT
100
400 100
400
mV
PK
Line Step Recovery
3
V
IN
= 15V to 50V
100
200 100
200
Sec
Turn On Delay
V
OUT
2 20 2 20
mSec
Turn On Overshoot
V
IN
= 0V to 28V
100
250 100
250
mV
PK
DVST2800T Series
90054DSD
6
SPECIFICATIONS
(T
CASE
= -55C to +100C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
50 V
DC
Operating Case Temperature
-55C to +100C
Input Voltage (Transient, 1 second)
80 Volts
Storage Temperature
-55C to +125C
Output Power
1
30 Watts
Lead Solder Temperature (10 seconds)
270C
Power Dissipation (Full Load, T
CASE
= +100C)
15 Watts
Weight (Maximum)
100 Grams
AUXILIARY OUTPUT
DVST28x3R3yyT DVST28x5yyT
Parameter Conditions
Min Typ Max Min Typ Max
Units
STATIC
V
OUT
T
CASE
=
25C
3.23 3.30 3.37 4.90 5.00 5.10 V
OUTPUT
Voltage
V
OUT
T
CASE
=
-55C
to
+100C 3.20 3.30 3.40 4.85 5.00 5.15 V
Power
2
4 5 W
Current
2
V
OUT
1.2
1.0
A
Ripple Voltage
V
OUT
Full Load, 20Hz to 10MHz
25
50
25
50
mV
p-p
Line Regulation
V
OUT
V
IN
= 15V to 50V
5
20
5
20
mV
Load Regulation
V
OUT
No Load to Full Load
10
30
10
30
mV
CAPACITIVE LOAD
1000 1000
F
DYNAMIC
Load Step Output Transient
V
OUT
100
200 100
200
mV
PK
Load Step Recovery
3
Half Load to Full Load
100
200 100
200
Sec
Line Step Output Transient
V
OUT
100
200 100
200
mV
PK
Line Step Recovery
3
V
IN
= 15V to 50V
100
200 100
200
Sec
Turn On Delay
V
OUT
2 20 2 20
mSec
Turn On Overshoot
V
IN
= 0V to 28V
0 50 0 50
mV
PK
Notes: 1. Dependant on output voltage.
2. Derate linearly from full rating at 100C to 0 at 110C.
3. Time for output voltage to settle to within 1% of its nominal value.
CONNECTION DIAGRAM
3
IN COM
4
INH
1
28V IN
5
+MAIN OUT
6
MAIN RET
LOAD
+
-
28 Vdc
2
DVST2800T
CASE
7
+AUX1 OUT
8
AUX1 RET
LOAD
9
+AUX2 OUT
10
AUX2 RET
LOAD
Figure 2
DVST2800T Series
90054DSD
7
BLOCK DIAGRAM
UNDER
VOLTAGE
SHUTDOWN
PRIMARY
HOUSEKEEPING
SUPPLY
PWM
CONTROL
VOLTAGE AND
CURRENT
AMPLIFIERS
SECONDARY
HOUSEKEEPING
SUPPLY
PIN 1
28V IN
PIN 3
IN COM
+V OUT
PIN 5
PIN 6
OUT COM
INH
PIN 4
FEEDBACK
MAGNETIC
PWM
CONTROL
+V OUT
PIN 7
PIN 8
OUT COM
+V OUT
PIN 9
PIN 10
OUT COM
LINEAR
REGULATOR
LINEAR
REGULATOR
PIN 2
CASE
Figure 3
INHIBIT DRIVE CONNECTION DIAGRAMS
3
IN COM
4
INH
1
28V IN
OPTIONAL
CAPACITOR
BIAS
11V
20K
3
IN COM
4
INH
1
28V IN
OPTIONAL
CAPACITOR
BIAS
11V
20K
OPTOISOLATOR
Figure 4
Internal Inhibit Circuit and Recommended Drive
Figure 5
Isolated Inhibit Drive
(Shown with optional capacitor for turn-on delay)
(Shown with optional capacitor for turn-on delay)
DVST2800T Series
90054DSD
8
EFFICIENCY PERFORMANCE CURVES
(T
CASE
= 25C, Full Load, Unless Otherwise Specified)
V
IN
= 15V
V
IN
= 28V
V
IN
= 50V
Figure 6
DVST2851212T
Figure 7
DVST2851515T
Efficiency (%) vs. Output Power (W)
Efficiency (%) vs. Output Power (W)
Figure 8
DVST283R31212T
Figure 9
DVST283R31515T
Efficiency (%) vs. Output Power (W)
Efficiency (%) vs. Output Power (W)
DVST2800T Series
90054DSD
9
EMI PERFORMANCE CURVES
(T
CASE
= +25C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
Figure 10
MIL-STD-461C CE03 Conducted Emissions
Figure 11
MIL-STD-461D CE102 Conducted Emissions
ENVIRONMENTAL QUALIFICATION
Description
MIL-STD-883
MIL-STD-202
Test Condition
Temperature Cycling
1010
102A
-55C to +100C, 100 cycles
Constant Acceleration
2001
212A
500g, 1min.
Mechanical Shock
2002 Cond. A
213B Cond. D
500g, 1ms
Random Vibration
2026 Cond. D
214A Cond. D
11.6G RMS, operating
Moisture Resistance
1004
106F
10 days
Barometric Pressure
1001 Cond. D
105C Cond. C
70,000 ft, operating
Salt Atmosphere
1009 Cond. B
101D Cond. B
48 hrs.
Resistance to Solvents
2015
215J
Solderability 2003
208H
DVST2800T Series
90054DSD
10
PACKAGE SPECIFICATIONS
PIN
FUNCTION
1 28V
IN
2 CASE
3 IN
COM
4 INHIBIT
5 +MAIN
OUT
6 MAIN
RET
7 +AUX1
OUT
8 AUX1
RET
9 +AUX2
OUT
10 AUX2
RET
Note:
Additional mounting options are available. Consult the factory for details.
Figure 12
Package and Pinout
(Dimensional Limits are 0.005" Unless Otherwise Stated)
DVST2800T Series
90054DSD
11
PACKAGE PIN DESCRIPTION
Pin
Function
Description
1
28V IN
Positive Input voltage Connection
2 CASE
Case
Connection
3
IN COM
Input Common Connection
4 INHIBIT
Logic Low = Disabled Output. Connecting the inhibit pin to input common (PIN 7)
causes converter shutdown.
Logic High = Enabled Output. Unconnected or open collector TTL.
5
+MAIN OUT
Main Positive Output Voltage Connection
6
MAIN RET
Main Output Return Connection
7
+AUX1 OUT
Auxiliary Positive Output Voltage Connection
8
AUX1 RET
Auxiliary Output Return Connection
9
+AUX2 OUT
Auxiliary Positive Output Voltage Connection
10
AUX2 RET
Auxiliary Output Return Connection
ENVIRONMENTAL SCREENING
Screening
Condition
Standard
(No Suffix)
Military
/ML
Pre-Cap Inspection
IPC-A-610 Class II
Temperature Cycling
-55C, 100C, 10 Cycles
Burn-In
96 hours at +100C
12 hours at +100C
Final Electrical
100% at -55C, 25C, 100C
1
100% at 25C
Final Inspection
MIL-STD-883,
Test Method 2009
DVST2800T Series
90054DSD
12
ORDERING INFORMATION
DVST
28
5
15
15
T
/ML - XXX
1 2 3 4 5 6 7 8 9
(1) (2) (3) (4) (5)
Product Series
Nominal Input
Voltage
Main Output
Auxiliary
Output 1
Auxiliary
Output 2
DVST
28
28 Volts
1R8
3R3
5
6R25
12
1.8 Volts
3.3 Volts
5 Volts
6.25 Volts
12 Volts
3R3
5
12
15
3.3 Volts
5 Volts
12 Volts
15 Volts
5
12
15
5 Volts
12 Volts
15 Volts
(6) (7) (8) (9)
Number of Outputs
Package Option
Screening Code
1
Additional Screening
Code
T
Triple
None
Standard
None
/ML
Standard
Military
Contact Sales
Notes:
1.
VPT Inc. reserves the right to ship higher screened products to meet lower screened orders at our sole
discretion
unless
specifically
forbidden by customer contract.
Please contact your sales representative or the VPT Inc. Sales Department for more information
concerning additional environmental screening and testing, different input voltage, output voltage,
power, or packaging requirements.
DVST2800T Series
90054DSD
13
CONTACT INFORMATION
To request a quotation or place orders please contact your sales representative or the VPT Inc.
Sales Department at:
Phone
: (425)
353-3010
Fax
:
(425) 353-4030
E-mail
: vptsales@vpt-inc.com
All information contained in this datasheet is believed to be accurate, however, no responsibility is assumed for possible
errors or omissions. The products or specifications contained herein are subject to change without notice.
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