These devices are intended for wave soldering or manual soldering.
They are not intended to be subject to surface mount processes under any circumstances.
The normal wave soldering process can be used with these devices where the device is subjected to a maximum wave temperature of 260°C for a period of
no more than 10 seconds. Within this time and temperature range, the integrity of the device’s plastic body will not be compromised and internal temperatures
within the converter will not exceed 175°C. Care should be taken to control manual soldering limits identical to that of wave soldering.
ISO9001
CERTIFIED
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
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-
email:
mk@murata-ps.com,
tel:
+44 (0)1908 615232
VKA50xSC.B01
Page 1 of 4
VKA50xSC
50 Watt Single Output Half Brick DC/DC Converter
SPECIFICATIONS, ALL MODELS
Specifications are at T
CASE
= +40°C nominal input voltage unless otherwise specified.
PARAMETER
INPUT
Voltage Range
18
33
Maximum Input Current
VKA50LS
VKA50MS
Reflected Ripple Current
Input Ripple Rejection
No Load Input Current LS/MS
CONDITIONS
MIN
TYP
MAX
UNITS
VKA50LS
24
48
V
IN
= 16VDC
V
IN
= 27VDC
Peak - Peak
DC to 1KHz
36
75
VDC
VDC
3.7
2.2
A
A
mA
dB
mA
W
W
0.520
0.360
8
12
mC
mC
mA
VKA50MS
INPUT
50
20
60
50/100
3.6/4.8
0.18/0.4
Power Dissipation LS/MS
No Load
Standby, Primary On/Off Disabled LS/MS
Inrush Charge
V
IN
= V
IN
max.
VKA50LS
VKA50MS
Quiescent Operating Current
Primary On/Off Disabled
PARAMETER
OUTPUT
Rated Power
Set point Accuracy
Line Regulation
Load Regulation
Output Temperature Drift
Output Ripple, p-p
Output Current Limit Inception
Output Short-Circuit Current (2)
Output Overvoltage Limit
Transient Response
Peak Deviation
Settling Time
CONDITIONS
MIN
0
TYP
MAX
50
1
0.05
0.5
UNITS
W
%
%
%
%/°C
V
OUT
, Nom
l
OUT
, Nom
l
OUT
, Nom
V
V
OUT
, Nom
μSec
OUTPUT
High Line to Low Line
No Load to Rated Load
DC to 20MHz BW
test
50 to 100% Load Step
di/dt = 1.0A/μSec
V
OUT
, 1% of Nominal Output
0.02
0.2
±.02
1%
130%
120%
125%
2%
100
150%
150%
135%
PARAMETER
ISOLATION
Input to Output
Input to Baseplate
Output to Baseplate
Resistance
Capacitance
Leakage Current
GENERAL
Efficiency, Line, Load, Temp. (3)
Switching Frequency
Remote Sense Compensation
Output Voltage Adjust Range
Remote On/Off Control Inputs
Primary
Sink Current-Logic Low
Vlow
Vhigh
Turn-on Time
Weight
TEMPERATURE
Operation/Specification
Storage
Shutdown Temperature
Thermal Impedance, case-ambient
Lead Solder Temperature
CONDITIONS
Peak Test for 2 Seconds
MIN
1500
1500
500
10
TYP
MAX
UNITS
VDC
VDC
VDC
MΩ
pF
μA,
rms
V
ISO
= 240VAC, 60Hz
2000
180
GENERAL
400
12V & higher(4)
Open Collector/Drain
420
-50% / +25%
440
0.5
KHz
V
V
OUT
, Nom
Within 1% of Rated Output
10.0
1.0
0.4
Open Collector
12.5
85 (3.0)
+100
+125
+115
+300
mA
V
mSec
g (oz.)
°C
°C
°C
°C/W
°C
Case Temperature
Case Temperature
Case Temperature
10 Seconds max
-40
-55
+100
+25
+25
7.1
NOTES:
1) See Typical Performance Curves, page 3
(2) Continuous Mode
(3) See graphs for Efficiency vs. Output Load, V
IN
, T
CASE
(4) 3.3V Models Limited in Trim Down Range
(5) Consult Factory for Details
www.murata-ps.com
Technical enquiries
-
email:
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tel:
+44 (0)1908 615232
VKA50xSC.B01
Page 2 of 4
VKA50xSC
50 Watt Single Output Half Brick DC/DC Converter
T
CASE
= +40°C nominal input voltage unless otherwise specified.
TYPICAL PERFORMANCE CURVES
Power Dissipation (W)
Ambient Air Temperature (°C)
VKA50
Device Family
Indicates 50 Watt Regulated Unit
Model Number
Selected from Table of Electrical Characteristics
Where:
x = Input Voltage (L = 24VDC; M = 48VDC)
zz = Output Voltage (03=3.3V, 05=5V, etc.)
Lead Length
0.200” - No Number
0.145” - (6)
0.110” - (8)
Remote On-Off Logic:
Positive - No Number
Negative - (1)
RoHS Compliant
xSzz
C
www.murata-ps.com
ORDERING
INFORMATION
Technical enquiries
-
email:
mk@murata-ps.com,
tel:
+44 (0)1908 615232
VKA50xSC.B01
Page 3 of 4
VKA50xSC
50 Watt Single Output Half Brick DC/DC Converter
MECHANICAL
NOTES:
All dimensions are in inches (millimeters).
0.530 MAX
[13.46]
0.20 [5.1]
PIN PLACEMENT TOLERANCE: ± 0.005”
MECHANICAL TOLERANCE: ± 0.015”
Marked with: specific modeL ordered, date code, job
code.
.081 [2.06] DIA.
2 PLACES
.040 [1.02] DIA.
7 PLACES
0.20 [5.1]
0.50 [12.7]
MATERIAL: Units are encapsulated in a low thermal
resistance molding compound which has excellent chemical
resistance and electrical properties in high humidity
environments and over a wide operating temperature
range. The encapsulant and outer shell of the unit have
UL94V-0 ratings. Lead material is solder plated to allow
ease of solderability.
0.40 [10.16]
.400 [10.16]
2.000
[50.80]
1.000
[25.40]
2.40
[61.0]
MAX
VKA50xSC
0.700
[17.78]
1.000
[25.40]
1.400
[35.56]
1.400
[35.56]
0.19 [4.8]
1.900
[48.26]
MOUNTING INSERTS M3 X 0.5 THRU, 4 PLACES
MAX. TORQUE, 8 IN/LBS
2.28
[57.91]
MAX
OUTPUT ADJUST VOLTAGE
This feature allows the user to accurately adjust the module’s
output voltage set point to a specified level. This is achieved
by connecting a resistor or potentiometer from the TRIM
terminal to either the +Vout terminal (for increased Vout) or
the -Vout terminal (for decreased Vout). The formulae below
describe the trim resistor value to obtain a Vout change of
%. V
O
is output voltage prior to adjustment (3.3V, 5V, 12V,
15V, or 24V).
Radj - up =
OVP NOTE
Special attention should be given to the peak voltage
deviation during a dynamic load step when trimming the
output above the original set point to avoid tripping the
overvoltage protection circuit. Should an OVP condition
occur, the converter will go into a latch condition and
must be externally reset before it will return to normal
