DV-704A Series
1X019DSD
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
EMI FILTERS
DESCRIPTION
The DV-704A is a combined hybrid EMI filter and
voltage spike protection module that is operable over
the full military (-55 C to +125 C) temperature
range with no power derating. The DV-704A EMI
filter is designed to be used with VPT/Delta's DVSA,
DVHF, DVTR, and DVFL series DC-DC converters to
comply with the surge requirements of MIL-STD-
704A, B, C, and D with 40 watts maximum output
power. This device also reduces the reflected noise
of the DC-DC converters to meet MIL-STD-461C
CE03 and MIL-STD-461D CE102 limits. It also
protects the DC-DC converters against the voltage
spikes specified in MIL-STD-461C CS06 and
conducted susceptibility in MIL-STD-461C CS01 and
CS02.
These filters 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
Up to 2.0 Amps Maximum Current
40 dB Minimum Attenuation at 500 kHz
Industry Standard Pinout
Inrush Current Limit and Soft Start
Under Voltage Lockout
Clamps Output Voltage to 50 Volts Maximum
Precision Seam Welded or Solder Seal
Hermetic Package
Custom Versions Available
Additional Environmental Screening Available
Meets MIL-STD-704A, B, C, and D Surge Limits
Compliant to MIL-STD-461C CE03 and MIL-
STD-461D CE102 EMC Requirements
Protects Against Conducted Susceptibility
Specified in MIL-STD-461C, CS01 and CS02
and Against Voltage Spikes Specified in MIL-
STD-461C CS06
MIL-PRF-38534 Element Evaluated
Components
Figure 1
DV-704A EMI Filter
(Not To Scale)
DV-704A Series
1X019DSD
2
SPECIFICATIONS
(T
CASE
= -55C to +125C, V
IN
= +28V 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
40 V
DC
Power Dissipation (Continuous)
15 Watts
Input Voltage (Transient, up to 20
s)
600 Volts
Power Dissipation (Peak)
500 Watts
Output Current
3
2.0 Amps
Storage Temperature
-65C to +150C
Weight (Maximum)
47 grams
Lead Solder Temperature (10 seconds)
300C
DV-704A
Parameter Conditions
Min Typ
Max
Units
STATIC
Continuous No
Load
0
28
40
V
Continuous 2.0 A Load
15
28
40
V
Transient 100 ms, R
S
= 0.0 -
-
80
V
Transient 60 ms, R
S
= 0.5 -
-
100
V
INPUT
Voltage
2
Transient 20
s, R
S
= 50
- -
600
V
No Load
-
-
10
mA
Current
1
Inhibited -
-
2.0
mA
OUTPUT
Voltage
Continuous V
OUT
= V
IN
(I
IN
x R
DC
) V
Current
3,4
Continuous 0
-
2.0
A
Open Circuit
-
14
16
V
INHIBIT PIN VOLTAGE
2
Inhibited 0
-
0.8
V
INHIBIT PIN CURRENT
2
Inhibit Pin Voltage = 0 to 0.8 V
-
-
-300
A
UNDERVOLTAGE LOCKOUT
7.0
-
14
V
OUTPUT CLAMP VOLTAGE
43
-
47
V
2.0 A Load, 80 V
-
-
100
ms
INPUT SURGE LIMIT
2
2.0 A Load, 100 V
-
-
80
ms
2.0 A Load, 600 V, R
S
= 50 -
-
20
s
INPUT SPIKE LIMIT
2
2.0 A Load, 400 V, R
S
= 0.5 -
-
20
s
INPUT INRUSH CURRENT
2
V
IN
= 0 28V, No Load
C
L
= 100
F
- 0.25
0.5
A
PK
DC RESISTANCE
Continuous
-
-
450
m
Continuous -
-
15
W
POWER DISSIPATION
Peak -
-
500
W
NOISE REJECTION
f = 500 kHz
50
-
-
dB
CAPACITANCE
2
Pin to Case
-
20
-
nF
ISOLATION
Any Pin to Case, 500 V
DC
100 - -
M
MTBF (MIL-HDBK-217F)
AIF @ T
C
= 55C
-
0.627
-
MHrs
Notes: 1. Derate linearly to 0 at 135C.
2. Verified by qualification testing.
3. Maximum output power is linearly derated to 0 A from +125C to +135C.
4. Rated current applies at any voltage.
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