DVFL2800D Series
1X011DSG
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 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 is a magnetic feedback circuit
that is radiation immune. Operating at a nominal
fixed frequency of 500 kHz, these regulated, isolated
units utilize 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
• Radiation Immune 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
• Radiation Hardened Version Available
• Precision Seam Welded Hermetic Package
• High Power Density: > 80 W/in3
• Custom Versions Available
• Additional Environmental Screening Available
• Meets MIL-STD-461C and MIL-STD-461D EMC
Requirements When Used With a DVME28 EMI
Filter
• MIL-PRF-38534 Element Evaluated
Components
Figure 1 – DVFL2800D DC-DC Converter
(Not To Scale)
DVFL2800D Series
1X011DSG 2
SPECIFICATIONS (TCASE = -55°C to +125°C, VIN = +28V ± 5%, Full Load5, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous) 40 VDC Junction Temperature Rise to Case +15°C
Input Voltage (Transient, 1 second) 50 Volts Storage Temperature -65°C to +150°C
Output Power1 120 Watts Lead Solder Temperature (10 seconds) 270°C
Power Dissipation (Full Load, TCASE = +125°C) 40 Watts Weight (Maximum) (No Pin Extensions) 86 Grams
DVFL2805D DVFL2812D
Parameter Conditions
Min Typ Max Min Typ Max
Units
STATIC
Continuous 16 28 40 16 28 40 V
INPUT
Voltage4 Transient, 1 sec - - 50 - - 50 V
Inhibited 1 - - 3 - - 3 mA
Inhibited 2 - - 70 - - 70 mA
Current
No Load - - 140 - - 140 mA
Ripple Current Full Load5, 20Hz to 10MHz - - 80 - - 80 mAp-p
INH1 Pin Input4 0 - 1.5 0 - 1.5 V
INH2 Pin Input4 0 - 1.0 0 - 1.0 V
INH1 Pin Open Circuit Voltage4 10.5 - 13.5 10.5 - 13.5 V
INH2 Pin Open Circuit Voltage4 5.0 - 8.0 5.0 - 8.0 V
UVLO Turn On 14.0 - 16.0 14.0 - 16.0 V
UVLO Turn Off4 11.0 - 14.5 11.0 - 14.5 V
+VOUT TCASE = 25°C 4.95 5.00 5.05 11.88 12.00 12.12 V
+VOUT TCASE = -55°C to +125°C 4.925 5.00 5.075 11.82 12.00 12.18 V
-VOUT TCASE = 25°C 4.80 5.00 5.20 11.80 12.00 12.20 V
OUTPUT
Voltage5
-VOUT TCASE = -55°C to +125°C 4.75 5.00 5.25 11.52 12.00 12.48 V
Total - - 100 - - 110 W
Power3,6 ±VOUT Either Output - - 70 - - 77 W
Current3,6 ±VOUT Either Output - - 14 - - 6.4 A
Ripple Voltage ±VOUT Full Load5, 20Hz to 10MHz - - 80 - - 80 mVp-p
+VOUT VIN = 16V to 40V - - 20 - - 20 mV
Line Regulation -VOUT VIN = 16V to 40V - - 200 - - 200 mV
+VOUT No Load to Full Load5 - - 100 - - 120 mV
Load Regulation -VOUT No Load to Full Load5 - - 200 - - 200 mV
Cross Regulation -VOUT
V1+ Load 30% - Load 70%
V2+ Load 70% - Load 30% - - 450 - - 450 mV
Voltage Trim Full Load -20 - 10 -20 - 10 %
Share Pin Voltage4 2.0 - 3.0 2.0 - 3.0 V
EFFICIENCY Full Load5 73 - - 80 - - %
Overload4 - - 80 - - 80 W
LOAD FAULT POWER DISSIPATION Short Circuit - - 80 - - 80 W
CAPACITIVE LOAD4 - - 500 - - 500
µF
SWITCHING FREQUENCY 425 500 600 425 500 600 kHz
SYNC FREQUENCY RANGE VH – VL = 5V
Duty Cycle = 20% - 80% 500 - 600 500 - 600 kHz
ISOLATION 500 VDC, TCASE = 25°C 100 - - 100 - - MΩ
MTBF (MIL-HDBK-217F) AIF @ TC = 55°C - 400 - - 400 - kHrs
DVFL2800D Series
1X011DSG 3
SPECIFICATIONS (TCASE = -55°C to +125°C, VIN = +28V ± 5%, Full Load5, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous) 40 VDC Junction Temperature Rise to Case +15°C
Input Voltage (Transient, 1 second) 50 Volts Storage Temperature -65°C to +150°C
Output Power1 120 Watts Lead Solder Temperature (10 seconds) 270°C
Power Dissipation (Full Load, TCASE = +125°C) 40 Watts Weight (Maximum) (No Pin Extensions) 86 Grams
DVFL2805D DVFL2812D
Parameter Conditions
Min Typ Max Min Typ Max
Units
DYNAMIC
Load Step Output Transient ±VOUT - - 400 - - 500 mVPK
Load Step Recovery2 Half Load to Full Load - - 500 - - 500
µSec
Line Step Output Transient4 ±VOUT - 300 600 - 600 1200 mVPK
Line Step Recovery2, 4 VIN = 16V to 40V - 300 500 - 300 500
µSec
Turn On Delay ±VOUT - - 20 - - 20 mSec
Turn On Overshoot VIN = 0V to 28V - - 25 - - 50 mVPK
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 135°C.
4. Verified by qualification testing.
5. Half load at +VOUT and half load at –VOUT.
6. Up to 70% of the total power or current can be drawn from any one of the two outputs.
DVFL2800D Series
1X011DSG 4
SPECIFICATIONS (TCASE = -55°C to +125°C, VIN = +28V ± 5%, Full Load5, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous) 40 VDC Junction Temperature Rise to Case +15°C
Input Voltage (Transient, 1 second) 50 Volts Storage Temperature -65°C to +150°C
Output Power1 120 Watts Lead Solder Temperature (10 seconds) 270°C
Power Dissipation (Full Load, TCASE = +125°C) 40 Watts Weight (Maximum) (No Pin Extensions) 86 Grams
DVFL2815D
Parameter Conditions
Min Typ Max
Units
STATIC
Continuous 16 28 40 V
INPUT
Voltage4 Transient, 1 sec - - 50 V
Inhibited 1 - - 3 mA
Inhibited 2 - - 70 mA
Current
No Load - - 140 mA
Ripple Current Full Load5, 20Hz to 10MHz - - 80 mAp-p
INH1 Pin Input4 0 - 1.5 V
INH2 Pin Input4 0 - 1.0 V
INH1 Pin Open Circuit Voltage4 10.5 - 13.5 V
INH2 Pin Open Circuit Voltage4 5.0 - 8.0 V
UVLO Turn On 14.5 - 16.0 V
UVLO Turn Off4 11.0 - 14.5 V
+VOUT TCASE = 25°C 14.85 15.00 15.15 V
+VOUT TCASE = -55°C to +125°C 14.775 15.00 15.225 V
-VOUT TCASE = 25°C 14.80 15.00 15.20 V
OUTPUT
Voltage5
-VOUT TCASE = -55°C to +125°C 14.40 15.00 15.60 V
Total - - 120 W
Power3,6 ±VOUT Either Output - - 84 W
Current3,6 ±VOUT Either Output - - 5.6 A
Ripple Voltage ±VOUT Full Load5, 20Hz to 10MHz - - 80 mVp-p
+VOUT VIN = 16V to 40V - - 20 mV
Line Regulation -VOUT VIN = 16V to 40V - - 200 mV
+VOUT No Load to Full Load5 - - 120 mV
Load Regulation -VOUT No Load to Full Load5 - - 200 mV
Cross Regulation -VOUT
V1+ Load 30% - Load 70%
V2+ Load 70% - Load 30% - - 450 mV
Voltage Trim Full Load -20 - 10 %
Share Pin Voltage4 2.0 - 3.0 V
EFFICIENCY Full Load5 81 - - %
Overload4 - - 80 W
LOAD FAULT POWER DISSIPATION Short Circuit - - 80 W
CAPACITIVE LOAD4 - - 500
µF
SWITCHING FREQUENCY 425 500 600 kHz
SYNC FREQUENCY RANGE VH – VL = 5V
Duty Cycle = 20% - 80% 500 - 600 kHz
ISOLATION 500 VDC, TCASE = 25°C 100 - - MΩ
MTBF (MIL-HDBK-217F) AIF @ TC = 55°C - 400 - kHrs
DVFL2800D Series
1X011DSG 5
SPECIFICATIONS (TCASE = -55°C to +125°C, VIN = +28V ± 5%, Full Load5, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous) 40 VDC Junction Temperature Rise to Case +15°C
Input Voltage (Transient, 1 second) 50 Volts Storage Temperature -65°C to +150°C
Output Power1 120 Watts Lead Solder Temperature (10 seconds) 270°C
Power Dissipation (Full Load, TCASE = +125°C) 40 Watts Weight (Maximum) (No Pin Extensions) 86 Grams
DVFL2815D
Parameter Conditions
Min Typ Max
Units
DYNAMIC
Load Step Output Transient ±VOUT - - 500 mVPK
Load Step Recovery2 Half Load to Full Load - - 500
µSec
Line Step Output Transient4 ±VOUT - 600 1200 mVPK
Line Step Recovery2, 4 VIN = 16V to 40V - 300 500
µSec
Turn On Delay ±VOUT - - 20 mSec
Turn On Overshoot VIN = 0V to 28V - - 50 mVPK
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 135°C.
4. Verified by qualification testing.
5. Half load at +VOUT and half load at –VOUT.
6. Up to 70% of the total power or current can be drawn from any one of the two outputs.
DVFL2800D Series
1X011DSG 6
BLOCK DIAGRAM
UNDER
VOLTAGE
SHUTDOWN
PRIMARY
H
OUSEKEEPIN
G
SUPPLY
PWM
CONTROL
VOLTAGE AND
CURRENT
AMPLIFIERS
SECONDARY
H
OUSEKEEPIN
G
SUPPLY
PIN 1
28V IN
PIN 2
IN COM
Q1
+V OUT
PIN 7
PIN 8
OUT COM
INH1
PIN 4
FEEDBACK
MAGNETIC
SYNC IN
PIN 6
SYNC OUT
PIN 5
TRIM
PIN 10
SHARE
PIN 11
INH2
PIN 12
-V OUT
PIN 9
Figure 2
CONNECTION DIAGRAM
2
IN COM
4
INH1
1
28V IN
7
+V OUT
8
OUT COM
LOAD
+
-
28 Vdc
-V OUT
9
INH2
12
SYNC IN
6
Figure 3
DVFL2800D Series
1X011DSG 7
INHIBIT DRIVE CONNECTION DIAGRAM
2IN COM
4INH1
128V IN
OPTIONAL
CAPACITOR
BIAS 1
12V
30K
OPTOISOLATOR
+
-
8V
2K
BIAS 2
INH2
12
OUT COM
8
Figure 4 – Isolated Inhibit Drive and Internal Equivalent Circuit
(Shown with optional capacitor for turn-on delay)
EMI FILTER HOOKUP DIAGRAM
2
IN COM
4
INH1
1
28V IN
7
+V OUT
8
OUT COM
LOAD
+
-
28 Vdc
12
28V OUT
7
OUT COM
1
28V IN
6
IN COM
CASE
- V OUT
9
INH2
12
SYNC IN
6
28V IN
2
28V IN
3
IN COM
4
IN COM
5
28V OUT
11
28V OUT
10
OUT COM
9
OUT COM
8
DVME28 EMI FILTER DVFL2800D DC-DC CONVERTER
Figure 5 – Converter with EMI Filter
DVFL2800D Series
1X011DSG 8
+28 VOLT OUTPUT CONNECTION DIAGRAM
2
IN COM
4
INH1
1
28V IN
7
+V OUT
8
OUT COM
-
28 Vdc
+
-
28 Vdc
-V OUT
9
INH2
12
DVFL2815D DC-DC CONVERTER
SYNC IN
6TRIM
10
+
100k
Figure 6: +28 Volt Output Converter Using DVFL2815D Converter
DVFL2800D Series
1X011DSG 9
PARALLEL CONNECTION DIAGRAM
2
IN COM
4
INH1
1
28V IN
7
+V OUT
8
OUT COM
+
-
28 Vdc
12
28V OUT
7
OUT COM
1
28V IN
6
IN COM
CASE
-V OUT
9
SYNC IN
6
28V IN
2
28V IN
3
IN COM
4
IN COM
5
28V OUT
11
28V OUT
10
OUT COM
9
OUT COM
8
DVME28 EMI FILTER DVFL2800D DC-DC CONVERTER
CASE
5
SYNC OUT
11
SHARE
2
IN COM
4
INH1
1
28V IN
7
+V OUT
8
OUT COM
-V OUT
9
SYNC IN
6
DVFL2800D DC-DC CONVERTER
CASE
5
SYNC OUT
11
SHARE
2
IN COM
4
INH1
1
28V IN
7
+V OUT
8
OUT COM
-V OUT
9
SYNC IN
6
DVFL2800D DC-DC CONVERTER
CASE
11
SHARE
Figure 7 – Current Sharing Parallel Connection for Multiple Converters
DVFL2800D Series
1X011DSG 10
OUTPUT VOLTAGE TRIM
The output voltage can be trimmed down by
connecting a resistor between the TRIM pin
(PIN 10) and the +V OUT pin (PIN 7), or
can be trimmed up by connecting a resistor
between the TRIM pin (PIN 10) and the
OUT COM pin (PIN 8). 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.
Figure 8 – Output Voltage Trim
DVFL2805D DVFL2812D DVFL2815D
±VOUT (V) RTRIM (Ω) ±VOUT (V) RTRIM (Ω) ±VOUT (V) RTRIM (Ω)
5.5 35k 13.2 5.8k 16.50 1.7k
5.4 47.5k 13.0 10k 16.25 5k
5.3 68.3k 12.8 16.2k 16.00 10k
5.2 110k 12.6 26.6k 15.75 18.3k
5.1 235k 12.4 47.3k 15.50 35k
5.0 - 12.2 109k 15.25 85k
4.9 225k 12.0 - 15.00 -
4.8 100k 11.8 454k 14.75 475k
4.7 58.3k 11.6 213k 14.50 225k
4.6 37.5k 11.4 134k 14.25 142k
4.5 25k 11.2 94k 14.00 100k
4.4 16.7k 11.0 70.1k 13.75 75k
4.3 10.7k 10.8 54.3k 13.50 58.3k
4.2 6.3k 10.6 42.9k 13.25 46.4k
4.1 2.8k 10.4 34.4k 13.00 37.5k
4.0 0 10.2 27.8k 12.75 30.6k
10.0 22.5k 12.50 25k
9.8 18.2k 12.25 20.5k
9.6 14.6k 12.00 16.7k
DVFL2800D Series
1X011DSG 11
EFFICIENCY PERFORMANCE CURVES (TCASE = 25°C, Full Load, Unless Otherwise Specified)
V
IN = 16V VIN = 28V VIN = 40V
70
75
80
85
90
20 40 60 80 100
Output Pow er (W)
Efficiency (%)
75
80
85
90
30 50 70 90 110
Output Pow er (W)
Efficiency (%)
Figure 9 – DVFL2805D Figure 10 – DVFL2812D
Efficiency (%) vs. Output Power (W) Efficiency (%) vs. Output Power (W)
75
80
85
90
30 50 70 90 110
Output Power (W)
Efficiency (%)
Figure 11 – DVFL2815D
Efficiency (%) vs. Output Power (W)
DVFL2800D Series
1X011DSG 12
EMI PERFORMANCE CURVES
(TCASE = 25°C, VIN = +28V ± 5%, Full Load, Unless Otherwise Specified)
Figure 12 – DVFL2800D without EMI Filter
Figure 13 – DVFL2800D with EMI Filter
DVFL2800D Series
1X011DSG 13
PACKAGE SPECIFICATIONS
TOP VIEW
PIN FUNCTION
1 28V IN
2 IN COM
3 CASE
4 INH1
5 SYNC OUT
6 SYNC IN
7 +V OUT
8 OUT COM
9 -V OUT
10 TRIM
11 SHARE
12 INH2
SIDE VIEW
Figure 14 – Package and Pinout
(Pin Length is ±0.01”, Other Dimensional Limits are ±0.005” Unless Otherwise Stated)
DVFL2800D Series
1X011DSG 14
PACKAGE SPECIFICATIONS (DOWN-LEADED)
TOP VIEW
PIN FUNCTION
1 28V IN
2 IN COM
3 CASE
4 INH1
5 SYNC OUT
6 SYNC IN
7 +V OUT
8 OUT COM
9 -V OUT
10 TRIM
11 SHARE
12 INH2
SIDE VIEW
Figure 15 – Package and Pinout (With Down-Leaded Pin Extensions Added)
(Pin Length is ±0.01”, Other Dimensional Limits are ±0.005” Unless Otherwise Stated)
DVFL2800D Series
1X011DSG 15
PACKAGE SPECIFICATIONS (UP-LEADED)
TOP VIEW
PIN FUNCTION
1 28V IN
2 IN COM
3 CASE
4 INH1
5 SYNC OUT
6 SYNC IN
7 +V OUT
8 OUT COM
9 -V OUT
10 TRIM
11 SHARE
12 INH2
SIDE VIEW
Figure 16 – Package and Pinout (With Up-Leaded Pin Extensions Added)
(Pin Length is ±0.01”, Other Dimensional Limits are ±0.005” Unless Otherwise Stated)
DVFL2800D Series
1X011DSG 16
PACKAGE PIN DESCRIPTION
Pin Function Description
1 28V IN Positive Input Voltage Connection
2 IN COM Input Common Connection
3 CASE Case Connection
4 INH1
Logic Low = Disabled Output. Connecting the inhibit(1) pin to input common
causes converter shutdown.
Logic High = Enabled Output. Unconnected or open collector TTL.
5 SYNC OUT Output Synchronization Signal
6 SYNC IN Input Synchronization Signal
7 +V OUT Positive Output Voltage Connection
8 OUT COM Output Common Connection
9 -V OUT Negative Output Voltage Connection
10 TRIM Trim Output Voltage to +10%, -20% of Nominal Value
11 SHARE Current Share
12 INH2
Logic Low = Disabled Output. Connecting the inhibit(2) pin to output common
causes converter shutdown.
Logic High = Enabled Output. Unconnected or open collector TTL.
DVFL2800D Series
1X011DSG 17
ENVIRONMENTAL SCREENING (100% Tested Per MIL-STD-883 as referenced to MIL-PRF-38534)
Notes: 1. 100% R&R testing at –55°C, +25°C, and +125°C with all test data included in product shipment.
2. PIND test Certificate of Compliance included in product shipment.
3. Radiographic test Certificate of Compliance and film(s) included in product shipment.
Screening MIL-STD-883 Standard
(No Suffix)
Extended
/ES
HB
/HB
Class H
/H
Class K
/K
Non-
Destructive
Bond Pull
Method 2023 • • • • •
Internal
Visual
Method 2017, 2032
Internal Procedure
•
•
•
•
•
Temperature
Cycling
Method 1010, Condition C
Method 1010, -55°C to 125°C
•
•
•
•
Constant
Acceleration
Method 2001, 3000g, Y1 Direction
Method 2001, 500g, Y1 Direction
•
•
•
•
PIND Method 2020, Condition A2
•
Pre Burn-In
Electrical 100% at 25°C
•
Burn-In
Method 1015, 320 hours at +125°C
Method 1015, 160 hours at +125°C
96 hours at +125°C
24 hours at +125°C
•
•
•
•
•
Final
Electrical
MIL-PRF-38534, Group A1
100% at 25°C
•
•
•
•
•
Hermeticity
Method 1014, Fine Leak, Condition A
Method 1014, Gross Leak, Condition C
Dip (1 x 10-3)
•
•
•
•
•
•
•
•
•
Radiography Method 20123
•
External
Visual Method 2009 • • • • •
DVFL2800D Series
1X011DSG 18
ORDERING INFORMATION
DVFL 28 05 D R DL /HB - XXX
1 2 3 4 5 6 7 8
(1) (2) (3) (4)
Product Series Nominal Input
Voltage Output Voltage Number of Outputs
DVFL
28
28 Volts
05
12
15
±5 Volts
±12 Volts
±15 Volts
D
Dual
(5) (6) (7) (8)
Rad-Hard Option2 Package Option Screening Code1,3 Additional Screening
Code
None
R
Standard
100 kRad
None
DL
UL
Standard
Down-Lead
Up-Lead
None
/ES
/HB
/H
/K
Standard
Extended
HB
Class H
Class K
Contact Sales
Notes: 1. Contact the VPT Inc. Sales Department for availability of Class H (/H) or Class K (/K) qualified products.
2. VPT Inc. is not currently qualified to a DSCC certified radiation hardness assurance program.
3. VPT Inc. reserves the right to ship higher screened or SMD 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 requirement, source inspection, and/or special element evaluation for space or other higher
quality applications.
DVFL2800D Series
1X011DSG 19
SMD (STANDARD MICROCIRCUIT DRAWING) NUM BERS
Standard Microcircuit
Drawing (SMD)
DVFL2800D Series
Similar Part Number
*T.B.D. DVFL2805D/H
*T.B.D. DVFL2812D/H
*T.B.D. DVFL2815D/H
Do not use the DVFL2800D Series similar part number for SMD product acquisition. It is listed for
reference only. For exact specifications for the SMD product, refer to the SMD drawing. SMD’s can be
downloaded from the DSCC website at http://www.dscc.dla.mil/programs/smcr/. The SMD number
listed above is for MIL-PRF-38534 Class H screening, standard gold plated lead finish, and no RHA
(Radiation Hardness Assurance) level. Please reference the SMD for other screening levels, lead
finishes, and radiation levels.
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.
