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Series KR
DC to DC Converters
Single and Dual Output

Wide Input Range up to 3.33:1
Isolated Regulated up to 20 Watt DC to DC Converters
Full Regulated All Units Shielded

This series of high efficiency, wide input range, encapsulated regulators come in 51 different models. These units feature a 500 VOLT DC input to output isolation in both single and dual output models. The KR Series will operate over a temperature range of -25º C TO +70º C with no heat sink or electrical derating. These units are excellent for applications where input voltage varies dramatically, yet a high efficiency and output voltage regulation must be maintained.

 

FEATURES
  • Single and dual isolated outputs
  • Voltage regulation over input range of
Unit
Low
High
KRA
18V
36V
KRB
36V
60V
KRC
18V
60V

 

  • Encapsulated semiconductors, conservatively rated for maximum reliability.
  • Load regulation (see table for typical variation at different loads)
  • Line regulation = Typical values
18-36V DC = ±1.5%
  • 36-60V DC = ±1.5%
  • 18-60V DC = ±3.0%
  • High efficiency - up to 83%
  • Will operate over a temperature range of -25º C to
    +70º C with no heat sink or electrical derating
  • 6 sided shielding
  • Isolation - 100 megohms at 500 volts DC
  • External output trimming pin standard +5%
  • Each unit is supplied with an external control pin. This "C" pin, when connected to the negative (-) input, will disable the unit, allowing for remote shutdown.
TYPICAL CHARACTERISTICS:

Test conditions: 25º C ambient
Operating temperature: -25º C to +70º C ambient
Output voltage tolerance: ± 2.5% at typcial input voltage
Output voltage temperature coefficient: 0.02% / º C
Storage temperature: -55º C to +125º C
Short circuit protection: Temporary
Operating frequency: 40Khtz, typical

OPTIONS AVAILABLE

  • Selected Mil-Std 883
  • Expanded operating temp.
    (-55º C to +85º C)
  • Stabilization Bake (125º C ambient)
  • Temperature Cycle (-55º C to +125º C)
  • High Temp, full power burn in (100% power, 125º C case temp)

 




 

 

SERIES KR - SINGLE OUTPUT

Pico
Part
Number
Input
Voltage
Range
Output
Voltage
DC
Max.
Load
Current
mA
Max.
Output
Power
(watts)
EFF.@
Full
Load
Typical
(%)*
Input
Current
Full
Load
Typical
(mA)*
Out Volt
Ripple @
Full LD.
1-1MHz BW
mv p-p
Out Volt
Tolerance
(± %)*
**

VLD. Reg.
25%-100%
Load
(± %)*

Line
Regu-
lation*
(± %)
Price
(US $)
KRA3.3S
KRA5S
KRA5.2S
KRA9S
KRA12S
KRA15S
KRA24S
KRA28S
KRA48S
KRA100S
18-36
18-36
18-36
18-36
18-36
18-36
18-36
18-36
18-36
18-36
3.3
5
5.2
9
12
15
24
28
48
100
6061
4000
3846
2222
1667
1333
833
714
417
200
20
20
20
20
20
20
20
20
20
20
78
78
78
80
78
78
81
82
83
83
950
950
950
925
950
950
915
905
890
890
60
60
60
60
60
60
60
60
80
100
1.00
0.75
0.75
0.50
0.50
0.50
0.50
0.50
0.50
0.50
3.00
2.50
2.50
1.25
1.00
1.00
0.50
0.50
0.50
0.50
2.50
1.50
1.50
0.75
0.50
0.50
0.25
0.25
0.25
0.25
226.77
226.77
226.77
226.77
226.77
226.77
226.77
226.77
226.77
304.66
KRB3.3S
KRB5S
KRB5.2AS
KRB9S
KRB12S
KRB15S
KRB24S
KRB28S
KRB48S
KRB100S
36-60
36-60
36-60
36-60
36-60
36-60
36-60
36-60
36-60
36-60
3.3
5
5.2
9
12
15
24
28
48
100
6061
4000
3846
2222
1667
1333
833
714
417
200
20
20
20
20
20
20
20
20
20
20
78
78
78
80
78
78
81
82
83
83
534
535
535
520
535
535
515
510
500
500
60
60
60
60
60
60
60
60
80
100
1.00
0.75
0.75
0.50
0.50
0.50
0.50
0.50
0.50
0.50
3.00
2.50
2.50
1.25
1.00
1.00
0.50
0.50
0.50
0.50
2.50
1.00
1.00
0.50
0.50
0.50
0.25
0.25
0.25
0.25
264.78
264.78
264.78
264.78
264.78
264.78
264.78
264.78
264.78
355.73
KRC3.3S
KRC5S
KRC5.2S
KRC9S
KRC12S
KRC15S
KRC24S
KRC28S
KRC48S
KRC100S
18-60
18-60
18-60
18-60
18-60
18-60
18-60
18-60
18-60
18-60
3.3
5
5.2
9
12
15
24
28
48
100
6061
4000
3846
2222
1667
1333
833
714
417
200
20
20
20
20
20
20
20
20
20
20
78
78
78
80
78
78
81
82
83
83
657
660
660
640
660
660
635
625
615
615
60
60
60
60
60
60
60
60
80
100
1.00
0.75
0.75
0.50
0.50
0.50
0.50
0.50
0.50
0.50
3.0
2.50
2.50
1.25
1.00
1.00
0.50
0.50
0.50
0.50
2.50
2.00
2.00
1.00
0.75
0.75
0.50
0.50
0.50
0.50
283.13
283.13
283.13
283.13
283.13
283.13
283.13
283.13
283.13
379.85
* Measurements taken with input voltage set at mid value
** 10% minimum load require

 

 

SERIES KR - DUAL OUTPUT

Pico
Part
Number
Input
Voltage
Range
Output
Voltage
DC
Per
Output
Max.
Load
Current
mA
Per
Output
Max.
Output
Power
(watts)
Per
Output
EFF.@
Full
Load
Typical
(%)*
INPUT
Current
Full
Load
Typical
(mA)*
Out Volt
Ripple @
Full LD.
1-1MHz BW
mv p-p
Out Volt
Tolerance
(± %)*
**

VLD. Reg.
25%-100%
Load
(± %)*

Line
Regu-
lation
(± %)
Price
(US $)
KRA5D
KRA9D
KRA12D
KRA15D
KRA24D
KRA28D
KRA48D
18-36
18-36
18-36
18-36
18-36
18-36
18-36
5
9
12
15
24
28
48
2000
1111
833
667
417
357
208
10
10
10
10
10
10
10
78
80
78
78
81
82
83
950
925
950
950
915
905
890
60
60
60
60
60
60
80
0.75
0.50
0.50
0.50
0.50
0.50
0.50
2.50
1.25
1.00
1.00
0.50
0.50
0.50
1.50
0.75
0.50
0.50
0.25
0.25
0.25
259.54
259.54
259.54
259.54
259.54
259.54
278.94
KRB5D
KRB9D
KRB12D
KRB15D
KRB24D
KRB28D
KRB48D
36-60
36-60
36-60
36-60
36-60
36-60
36-60
5
9
12
15
24
28
48
2000
1111
833
667
417
357
208
10
10
10
10
10
10
10
78
80
78
78
81
82
83
535
520
535
535
515
510
500
60
60
60
60
60
60
80
0.75
0.50
0.50
0.50
0.50
0.50
0.50
2.50
1.25
1.00
1.00
0.50
0.50
0.50
1.00
0.50
0.50
0.50
0.25
0.25
0.25
297.55
297.55
297.55
297.55
297.55
297.55
319.80
KRC5D
KRC9D
KRC12D
KRC15D
KRC24D
KRC28D
KRC48D
18-60
18-60
18-60
18-60
18-60
18-60
18-60
5
9
12
15
24
28
48
2000
1111
833
667
417
357
208
10
10
10
10
10
10
10
78
80
78
78
81
82
83
660
640
660
660
635
625
615
60
60
60
60
60
60
80
0.75
0.50
0.50
0.50
0.50
0.50
0.50
2.50
1.25
1.00
1.00
0.50
0.50
0.50
2.00
1.00
0.75
0.75
0.50
0.50
0.50
315.90
315.90
315.90
315.90
315.90
315.90
339.52
* Measurements taken with input voltage set at mid value
** 10% minimum load require

 

Series KR Single Output

 

Series KR Single Output
C: is control pin
NOTE: all radii typ. 7/64"
 

bottom view

Larger Size Drawing

Use 50 K Ohm trim pot rated 1/4 Watt between trim pin and negative input.  Trim down to raise output voltage to a maximum of 5%.  Do not go beyond 5%.  Reducing the resistance value further could damage the unit.

Each unit is supplied with an external control pin. This "C" pin,
when connected to the negative (-) input, will disable the unit,
allowing for remote shutdown.

Larger Size Schematic

Typical Weight: 165 Grams

 

   

 

 

Series KR Dual Output

 

Series KR Dual Output
C: is control pin
NOTE: all radii typ. 7/64"
 

bottom view

Larger Size Drawing

Use 50 K Ohm trim pot rated 1/4 Watt between trim pin and negative input.  Trim down to raise output voltage to a maximum of 5%.  Do not go beyond 5%.  Reducing the resistance value further could damage the module.

Each unit is supplied with an external control pin. This "C" pin,
when connected to the negative (-) input, will disable the unit,
allowing for remote shutdown.

Larger Size Schematic

Typical Weight: 165 Grams

 

   

 

 


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 or Fax: 914-738-8225

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