Military DC-DC Converters

Series LFB/LMB Single and Series LFB/LMB Dual

Isolated Regulated 75 Watts, Wide Input Range/36-72 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. LFB /LMB 5SP). Consult factory to optimize for your application.

Series LFB : (-40º C to +85º C Operating Temperature)
Series LMB : (-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 LFB and LMB Series of high power DC-DC Converters, allow a wide input voltage of 36-72 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 LFB/LMB Single * 75 Watts * Input 36-72 VDC
Input
Volt.
Range
(V DC)
Output
Voltage
(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)
Output
Voltage
Toler.
**
(± %)
Series LFB Single
(-40º C to +85º C)
Series LMB Single
(-55º C to +85º C)
10 - 50%
50-100%
36-48V
48-72V
Pico
Part
Number
Price
(US $)
Pico
Part
Number
Price
(US $)
36-72
3.3
30
74
1.5
1.5
0.75
0.75
50
2.0
LFB3.3S
303.67
LMB3.3S
455.50
36-72
5
50
80
1.0
1.0
0.75
0.75
50
1.5
LFB5S
303.67
LMB5S
455.50
36-72
5.2
50
80
1.0
1.0
0.75
0.75
50
1.5
LFB5.2S
303.67
LMB5.2S
455.50
36-72
9
65
84
1.0
1.0
0.75
0.75
50
1.0
LFB9S
303.67
LMB9S
455.50
36-72
12
75
84
0.75
0.75
0.5
0.5
50
1.0
LFB12S
303.67
LMB12S
455.50
36-72
15
75
84
0.75
0.75
0.5
0.5
50
1.0
LFB15S
303.67
LMB15S
455.50
36-72
24
75
87
0.5
0.5
0.5
0.5
50
0.5
LFB24S
303.67
LMB24S
455.50
36-72
28
75
87
0.5
0.5
0.5
0.5
50
0.5
LFB28S
303.67
LMB28S
455.50
36-72
48
75
85
0.5
0.5
0.5
0.5
50
0.5
LFB48S
303.67
LMB48S
455.50
36-72
100
75
85
0.5
0.5
0.5
0.5
100
0.5
LFB100S
455.50
LMB100S
683.25
10% Minimum load required at all times.
* Using proper thermal management, maximum temp. of +85º C (case)
** Reading taken at nominal 48 VDC input

 

Series LFB/LMB Dual * 75 Watts * Input 36-72 VDC
Input
Volt.
Range
(V DC)
Output
Voltage
(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)
Output
Voltage
Toler.
**
(± %)
Series LFB Dual
(-40º C to +85º C)
Series LMB Dual
(-55º C to +85º C)
10-50%
50-100%
36-48V
48-72V
Pico
Part
Number
Price
(US $)
Pico
Part
Number
Price
(US $)
36-72
5
50
80
1
1
0.75
0.75
50
1.5
LFB5D
409.60
LMB5D
614.39
36-72
9
65
84
1
1
0.75
0.75
50
1
LFB9D
409.60
LMB9D
614.39
36-72
12
75
84
0.75
0.75
0.5
0.5
50
1
LFB12D
409.60
LMB12D
614.39
36-72
15
75
85
0.75
0.75
0.5
0.5
50
1
LFB15D
409.60
LMB15D
614.39
36-72
24
75
87
0.5
0.5
0.5
0.5
50
0.5
LFB24D
409.60
LMB24D
614.39
36-72
28
75
87
0.5
0.5
0.5
0.5
50
0.5
LFB28D
409.60
LMB28D
614.39
36-72
48
75
85
0.5
0.5
0.5
0.5
50
0.5
LFB48D
409.60
LMB48D
614.39
10% Minimum load required at all times.
* Using proper thermal management, maximum temp. of +85º C (case)
** Reading taken at nominal 48 VDC input

 

****HIGH VOLTAGE SERIES LFB/ LMB

TO 250 VDC - 50 WATTS - INPUT 36-72 VDC

 

INPUT
VOLTAGE
RANGE
(V DC)

 

OUTPUT
VOLTAGE
(V DC)

 

MAX.
OUTPUT
POWER
(W)*

 

EFF. @
FULL
LOAD
TYP.
(%)**
MAX. LOAD
REGULATION
(%)**
MAX. LINE
REGULATION
AT FULL LOAD
(%)
OUTPUT
VOLTAGE
RIPPLE
FULL
LOAD
1-1MHz
BW
(%)
OUTPUT
VOLTAGE
Tolerance
(±%)**
SERIES LFB SINGLE
-40ºC TO +85ºC
SERIES LMB SINGLE
(-55ºC TO +85ºC)
10-50%
50-100%
36-48V
48-72V
PICO
PART
NUMBER
PRICE
(US $)
PICO
PART
NUMBER
PRICE
(US $)
36-72
125
50
84
0.5
0.5
0.3
0.3
1
0.5
LFB125S
455.50
LMB125S
683.25
36-72
150
50
84
0.5
0.5
0.3
0.3
1
0.5
LFB150S
455.50
LMB150S
683.25
36-72
175
50
84
0.5
0.5
0.3
0.3
1
0.5
LFB175S
455.50
LMB175S
683.25
36-72
200
50
84
0.5
0.5
0.3
0.3
1
0.5
LFB200S
607.33
LMB200S
911.00
36-72
225
50
84
0.5
0.5
0.3
0.3
1
0.5
LFB225S
607.33
LMB225S
911.00
36-72
250
50
84
0.5
0.5
0.3
0.3
1
0.5
LFB250S
607.33
LMB250S
911.00
10% Minimum load required at all times
*Using proper thermal management, maximum temp of +85ºC (case)
**Reading taken at nominal 48 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