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Military DC-DC Converters
Series LFD/LMD Single and Series LFD/LMD Dual
Isolated Regulated 75 Watts, Wide Input Range/200-380 VDC
Fully Regulated, Short Circuit Protected
Parallel Operation Available
Features:
Dual isolated outputs
Short circuit protection
Input voltage protection
Thermal, over temp. shutdown
Line regulation
Load regulation
No external components required
Hi density, hi efficiency design
Remote shutdown
Trim capabilities
Fixed frequency-100 Khtz
46 Standard Models
For all variations, call factory.
For Parallel Operation: Add suffix "P"
(i.e. LFD/LMD5SP) Consult factory to optimize for your
application.
Series LFD : (-40º C to +85º C Operating Temperature)
Series LMD : (-55º C to +85º C Operating Temperature)
Typical Characteristics:
Frequency:
100 Khtz
Base plate:
Max. +85º C
Operating temperature:
See thermal chart: -40º C to
+85º C base plate, -55º C to +85º C base plate.
Test conditions:
25º C ambient
Isolation Base Input:
2121 VDC
Isolation Input Output:
4242 VDC
Isolation Output to Base:
1000 VDC
Storage temperature:
-55º C to +105º C
Surge
:
Meets MIL STD 704
Vibration:
Meets MIL STD 202 Method 204 Cond. D
Humidity:
Meets MIL STD 202 Method 106
Shock:
Meets MIL STD 202 Method 213 Cond. I
Altitude:
Meets MIL STD 202 Method 105 Cond. D
Selected MIL STD 883 Options also Available
Stabilization Bake:
MIL STD 883 Method 1008 24 Hrs
TA=125º C
Burn In:
MIL STD 883 Method 1015 160 Hrs at 90º C, case
Temperature Cycle:
MIL STD 883 -55ºC to +105ºC Method
1010 Cond. B
The PICO LFD and LMD Series of high power DC-DC Converters, allow a wide input voltage of 200-380 VDC,
while maintaining a regulated output. They are fully safeguarded for over voltage, over temperature and continuous
short circuit protection.
The availability of Dual Isolated outputs, small size, and the capability of parallel operation as standard features
should reduce your design and component costs, while the fixed frequency operation helps parallel connections for
higher power requirements.
This high density unit is assembled in the USA with PICO quality and component selection, allowing it to meet the
most stringent commercial requirements.
Series LFD/LMD Single * 75 Watts * Input 200-380 VDC
Max.
Output
Max.
Line
Series LFD
Series LMD
Voltage
EFF.
Load
Regulation Ripple Outp.
Single
Single
Input
Max.
Outp.
Full
Regulation
At Full
Volt.
Output
(Full
Volt. (-40º C to +85º (-55º C to +85º
Volt.
Load
(%)**
Load
C)
C)
Range
Power
Load) Toler.
(V
Typical
(%)
(V
*
1-1MHz
**
DC)
**
DC)
(W)
BW
(± %)
Pico
Price
Pico
Price
(%)
10-
50- 200- 300- (MV P-
Part
(US
Part
(US
50% 100% 300V 380V
P)
Number
$)
Number
$)
200-
380
200-
380
200-
380
200-
380
200-
380
200-
380
200-
380
200-
380
200-
380
200-
380
3.3
30
73
1.50
1.50
1.00
1.00
50
2
LFD3.3S
324.92 LMD3.3S
455.50
5
50
80
1.25
1.25
1.00
1.00
50
1.5
LFD5S
324.92
LMD5S
455.50
5.2
50
80
1.25
1.25
1.00
1.00
50
1.5
LFD5.2S
324.92 LMD5.2S
455.50
9
65
84
1.25
1.25
0.75
0.75
50
1
LFD9S
324.92
LMD9S
455.50
12
75
84
1.00
1.00
0.75
0.75
50
1
LFD12S
324.92
LMD12S
455.50
15
75
84
1.00
1.00
0.75
0.75
50
1
LFD15S
324.92
LMD15S
455.50
24
75
85
0.75
0.75
0.50
0.50
50
0.5
LFD24S
324.92
LMD24S
455.50
28
75
86
0.50
0.50
0.50
0.50
50
0.5
LFD28S
324.92
LMD28S
455.50
48
75
85
0.50
0.50
0.50
0.50
50
0.5
LFD48S
324.92
LMD48S
455.50
100
75
85
0.50
0.50
0.50
0.50
100
0.5
LFD100S 487.38 LMD100S 683.25
10% Minimum load required at all times.
* Using proper thermal management, maximum temp. of +85º C (case)
** Reading taken at nominal 300 VDC input
Series LFD/LMD Dual * 75 Watts * Input 200-380 VDC
Max.
Output
Max.
Line
Series LFD
Series LMD
Voltage
EFF.
Load
Regulation Ripple Outp.
Dual
Dual
Input
Max.
Outp.
Full
Regulation
At Full
Volt.
Output
(Full
Volt. (-40º C to +85º (-55º C to +85º
Volt.
Load
(%)**
Load
C)
C)
Range
Power
Load) Toler.
(V
Typical
(%)
(V
*
1-1MHz
**
DC)
**
DC)
(W)
BW
(± %)
Pico
Price
Pico
Price
(%)
10-
50- 200- 300- (MV P-
Part
(US
Part
(US
50% 100% 300V 380V
P)
Number
$)
Number
$)
200-
380
200-
380
200-
380
200-
5
50
80
1.25
1.25
1
1
50
1.5
LFD5D
438.27
LMD5D
614.39
9
65
84
1.25
1.25
0.75
0.75
50
1
LFD9D
438.27
LMD9D
614.39
12
75
84
1
1
0.75
0.75
50
1
LFD12D
438.27
LMD12D
614.39
200-
380
200-
380
200-
380
200-
380
15
75
84
1
1
0.5
0.5
50
1
LFD15D
438.27
LMD15D
614.39
24
75
85
0.75
0.75
0.5
0.5
50
0.5
LFD24D
438.27
LMD24D
614.39
28
75
86
0.5
0.5
0.5
0.5
50
0.5
LFD28D
438.27
LMD28D
614.39
48
75
85
0.5
0.5
0.5
0.5
50
0.5
LFD48D
438.27
LMD48D
614.39
10% Minimum load required at all times.
* Using proper thermal management, maximum temp. of +85º C (case)
** Reading taken at nominal 300 VDC input
****HIGH VOLTAGE SERIES LFD/LMD
TO 250 VDC - 50 WATTS - INPUT 200-380 VDC
MAX. LINE
OUTPUT
MAX.
SERIES LMD
REGULATION VOLTAGE
SERIES LFD
LOAD
SINGLE
EFF. @
AT FULL
SINGLE
INPUT
MAX.
RIPPLE
OUTPUT
(-55ºC TO
OUTPUT
OUTPUT REGULATION
LOAD
VOLTAGE
OUTPUT
FULL
VOLTAGE (-40ºC to +85ºC)
(%)**
+85ºC)
VOLTAGE
LOAD
(%)
RANGE
POWER
LOAD
Tolerance
(VDC)
TYP.
(VDC)
(W)*
1-1 MHz
(±%)**
PICO
PICO
(%)**
20-
50-
200-
300-
PRICE
PRICE
BW
PART
PART
50% 100% 300V 380V
(US $)
(US $)
(%)
Number
Number
200-380
200-380
200-380
200-380
200-380
200-380
125
150
175
200
225
250
50
50
50
50
50
50
85
85
85
85
85
85
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
1
1
1
1
1
1
0.5
0.5
0.5
0.5
0.5
0.5
LFD125S
LFD150S
LFD175S
LFD200S
LFD225S
LFD250S
487.38
487.38
487.38
649.85
649.85
649.85
LMD125S
LMD150S
LMD175S
LMD200S
LMD225S
LMD250S
683.25
683.25
683.25
911.00
911.00
911.00
10% Minimum load required at all times
*Using proper thermal management maximum temp of +85ºC (case)
**Reading taken at nominal 300 VDC input
****UL approval recognition pending
VIEW HEAT SINKS
GO TO APPLICATION NOTES
GO TO MECHANICAL CONFIGURATION
(http://www.picoelectronics.com/node/13342) (http://www.picoelectronics.com/node/13343) (http://www.picoelectronics.com/node/13347)
Larger Version of Graph
(http://www.picoelectronics.com/sites/all/staticpage_images/pe117gb.jpg)
For immediate engineering assistance or to place an order:
Call Toll Free: 800-431-1064
PICO Electronics, Inc.
143 Sparks Ave. Pelham, NY 10803-1810
Tel: 914-738-1400 Fax: 914-738-8225
(http://www.webstat.com/free_web_statistics.php)
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