Product Data Sheet
50 W
ATT
S
INGLE
O
UTPUT
H
IGH
D
ENSITY
DC/DC C
ONVERTER
VKA50xS Seriesz
FEATURES
!
18 - 36V & 33 - 75V INPUT RANGE
!
SMALL SIZE: 2.28" X 2.4" X 0.50"
!
HIGH EFFICIENCY: 87% TYPICAL AT 5V
!
100碌S TRANSIENT RESPONSE 50-100% LOAD STEP
碌
!
420kH
Z
FIXED-FREQUENCY OPERATION
!
OPERATION TO +100擄C BASEPLATE TEMP.
!
PRIMARY REMOTE ON/OFF, CHOICE OF POS/NEG
LOGIC
!
ADJUSTABLE OUTPUT VOLTAGE
!
REMOTE SENSE
!
CONTINUOUS SHORT-CIRCUIT PROTECTION
!
THERMAL SHUTDOWN
!
SAFETY PER UL1950, EN 60950 AND CSA 22.2 #234
!
CASE GROUND PIN
DESCRIPTION
The VKA50xS Series DC/DC converters present an eco-
nomical and practical solution for distributed power
system architectures which require high power density
and efficiency while maintaining system modularity and
upgradeability. With the ability to operate over a wide
input voltage range of 18 to 36 and 33 to 75 volts, these
modules are ideal for use in battery backup applications
common in todays' telecommunication and electronic
data processing applications. The output is fully isolated
from the input, allowing for a variety of polarity and
grounding configurations.
The VKA50xS's proprietary control circuitry responds to
50-100% load steps in 100碌Seconds to within 1% nomi-
nal Vout.
The patented fixed frequency architecture combined with
surface mount technology results in a compact, efficient
and reliable solution to DC/DC conversion requirements.
Efficiency(%)
Input
Model
VKA50LS03
VKA50LS05
VKA50LS12
VKA50LS15
VKA50LS24
(18-36)
24VDC
Efficiency(%)
Input
Model
VKA50MS03
VKA50MS05
VKA50MS12
VKA50MS15
VKA50MS24
(33-75)
48VDC
V
OUT
3.3V
5.0V
12.0V
15.0V
24.0V
I
OUT
(A)
10.0
10.0
4.2
3.3
2.1
Note (1)
V
OUT
3.3V
5.0V
12.0V
15.0V
24.0V
I
OUT
(A)
10.0
10.0
4.2
3.3
2.1
81
86
88
89
89
Note (1)
Voltage (VDC)
Min
80
85
87
88
89
Typ
81
86
88
89
90
Voltage (VDC)
Min
Typ
82
87
89
90
90
AGENCY APPROVALS
VKA50xS Rev C 3/2001
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