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
Input
Volt.
Range
(V DC)
Outp.
Volt.
(V DC)
Max.
Output
Power
*
(W)
EFF.
Full
Load
Typical
**
(%)
Max.
Load
Regulation
(%)**
Max.
Line
Regulation
At Full Load
(%)
Output
Voltage
Ripple
(Full
Load)
1-1MHz
BW
(MV P-P)
Outp.
Volt.
Toler.
**
(± %)
Series LFD Single
(-40º C to +85º C)
Series LMD Single
(-55º C to +85º C)
10-50%
50-100%
200-300V
300-380V
Pico
Part
Number
Price
Pico
Part
Number
Price
200-380
3.3
30
73
1.50
1.50
1.00
1.00
50
2
LFD3.3S
276.06
LMD3.3S
414.09
200-380
5
50
80
1.25
1.25
1.00
1.00
50
1.5
LFD5S
276.06
LMD5S
414.09
200-380
5.2
50
80
1.25
1.25
1.00
1.00
50
1.5
LFD5.2S
276.06
LMD5.2S
414.09
200-380
9
65
84
1.25
1.25
0.75
0.75
50
1
LFD9S
276.06
LMD9S
414.09
200-380
12
75
84
1.00
1.00
0.75
0.75
50
1
LFD12S
276.06
LMD12S
414.09
200-380
15
75
84
1.00
1.00
0.75
0.75
50
1
LFD15S
276.06
LMD15S
414.09
200-380
24
75
85
0.75
0.75
0.50
0.50
50
0.5
LFD24S
276.06
LMD24S
414.09
200-380
28
75
86
0.50
0.50
0.50
0.50
50
0.5
LFD28S
276.06
LMD28S
414.09
200-380
48
75
85
0.50
0.50
0.50
0.50
50
0.5
LFD48S
276.06
LMD48S
414.09
200-380
100
75
85
0.50
0.50
0.50
0.50
100
0.5
LFD100S
414.09
LMD100S
621.14
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
Input
Volt.
Range
(V DC)
Outp.
Volt.
(V DC)
Max.
Output
Power
*
(W)
EFF.
Full
Load
Typical
**
(%)
Max.
Load
Regulation
(%)**
Max.
Line
Regulation
At Full Load
(%)
Output
Voltage
Ripple
(Full
Load)
1-1MHz
BW
(MV P-P)
Outp.
Volt.
Toler.
**
(± %)
Series LFD Dual
(-40º C to +85º C)
Series LMD Dual
(-55º C to +85º C)
10-50%
50-100%
200-300V
300-380V
Pico
Part
Number
Price
Pico
Part
Number
Price
200-380
5
50
80
1.25
1.25
1
1
50
1.5
LFD5D
372.36
LMD5D
558.54
200-380
9
65
84
1.25
1.25
0.75
0.75
50
1
LFD9D
372.36
LMD9D
558.54
200-380
12
75
84
1
1
0.75
0.75
50
1
LFD12D
372.36
LMD12D
558.54
200-380
15
75
84
1
1
0.5
0.5
50
1
LFD15D
372.36
LMD15D
558.54
200-380
24
75
85
0.75
0.75
0.5
0.5
50
0.5
LFD24D
372.36
LMD24D
558.54
200-380
28
75
86
0.5
0.5
0.5
0.5
50
0.5
LFD28D
372.36
LMD28D
558.54
200-380
48
75
85
0.5
0.5
0.5
0.5
50
0.5
LFD48D
372.36
LMD48D
558.54
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
INPUT
VOLTAGE
RANGE
(VDC)
OUTPUT
VOLTAGE
(VDC)
MAX.
OUTPUT
POWER
(W)*
EFF. @
OUTPUT
LOAD
TYP.
(%)**
MAX.
LOAD
REGULATION
(%)**
MAX. LINE
REGULATION
AT FULL LOAD
(%)
OUTPUT
VOLTAGE
RIPPLE
FULL
LOAD
1-1 MHz
BW
(%)
OUTPUT
VOLTAGE
Tolerance
(±%)**
SERIES LFD
SINGLE
(-40ºC to +85ºC)
SERIES LMD
SINGLE
(-55ºC TO +85ºC)
10-50%
50-100%
200-300V
300-380V
PICO
PART
Number
PRICE
PICO
PART
Number
PRICE
200-380
125
50
85
0.5
0.5
0.3
0.3
1
0.5
LFD125S
414.09
LMD125S
621.14
200-380
150
50
85
0.5
0.5
0.3
0.3
1
0.5
LFD150S
414.09
LMD150S
621.14
200-380
175
50
85
0.5
0.5
0.3
0.3
1
0.5
LFD175S
414.09
LMD175S
621.14
200-380
200
50
85
0.5
0.5
0.3
0.3
1
0.5
LFD200S
552.12
LMD200S
828.18
200-380
225
50
85
0.5
0.5
0.3
0.3
1
0.5
LFD225S
552.12
LMD225S
828.18
200-380
250
50
85
0.5
0.5
0.3
0.3
1
0.5
LFD250S
552.12
LMD250S
828.18
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

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For immediate engineering assistance or to place an order: Call Toll Free: 800-431-1064

PICO Electronics, Inc.

143 Sparks Ave. Pelham, NY 10803-1837
Tel: 914-738-1400 Fax: 914-738-8225