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.
Product: www.cd4power.com
VKA50xSC
(Rev A: RoHS) 05/2006
SPECIFICATIONS, ALL MODELS
PARAMETER
Specifications are at T
CASE
= +40°C nominal input voltage unless otherwise specified.
CONDITIONS
MIN
TYP
INPUT
Voltage Range
VKA50LS
VKA50MS
Maximum Input Current
VKA50LS
V
IN
= 16VDC
VKA50MS
V
IN
= 27VDC
Reflected Ripple Current
Peak - Peak
Input Ripple Rejection
DC to 1KHz
No Load Input Current LS/MS
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
MAx
UNITS
18
33
24
48
36
75
3.7
2.2
VDC
VDC
A
A
mA
dB
mA
W
W
mC
mC
mA
INPUT
50
20
60
50/100
3.6/4.8
0.18/0.4
0.520
0.360
12
8
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
PARAMETER
CONDITIONS
High Line to Low Line
No Load to Rated Load
DC to 20MHz BW
test
50 to 100% Load Step
di/dt = 1.0A/mSec
V
OUT
, 1% of Nominal Output
MIN
0
TYP
0.02
0.2
±.02
1%
130%
120%
125%
2%
100
MAx
50
1
0.05
0.5
150%
150%
135%
UNITS
W
%
%
%
%/°C
V
OUT
, Nom
l
OUT
, Nom
l
OUT
, Nom
V
V
OUT
, Nom
mSec
OUTPUT
ISOLATION
Input to Output
Peak Test for 2 Seconds
Input to Baseplate
Output to Baseplate
Resistance
Capacitance
Leakage Current
V
ISO
= 240VAC, 60Hz
GENERAL
Efficiency, Line, Load, Temp. (3)
Switching Frequency
Remote Sense Compensation
Output Voltage Adjust Range
12V & higher(4)
Remote On/Off Control Inputs
Primary
Open Collector/Drain
Sink Current-Logic Low
Vlow
Vhigh
Turn-on Time
Within 1% of Rated Output
Weight
TEMPERATURE
Operation/Specification
Case Temperature
Storage
Case Temperature
Shutdown Temperature
Case Temperature
Thermal Impedance, case-ambient
Lead Solder Temperature 10 Seconds max
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
PARAMETER
CONDITIONS
MIN
1500
1500
500
10
TYP
2000
180
MAx
UNITS
VDC
VDC
VDC
MW
pF
mA,
rms
GENERAL
400
420
-50% / +25%
440
0.5
1.0
0.4
Open Collector
12.5
85 (3.0)
+100
+125
+115
+300
KHz
V
V
OUT
, Nom
mA
V
mSec
g (oz.)
°C
°C
°C
°C/W
°C
10.0
-40
-55
+100
+25
+25
7.1
Product: www.cd4power.com
VKA50xSC
(Rev A: RoHS) 05/2006
T
CASE
= +40°C nominal input voltage unless otherwise specified.
TYPICAL PERFORMANCE CURVES
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
VKA50xSC
VKA50
xSzz
C
ORDERING
INFORMATION
Product: www.cd4power.com
(Rev A: RoHS) 05/2006
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”
.040 [1.02] DIA.
7 PLACES
.081 [2.06] DIA.
2 PLACES
Marked with: specific modeL ordered, date code, job
code.
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.
0.20 [5.1]
0.50 [12.7]
0.40 [10.16]
2.000
[50.80]
.400 [10.16]
1.000
[25.40]
VKA50xSC
0.700
[17.78]
1.000
[25.40]
2.40
[61.0]
MAX
1.400
[35.56]
1.400
[35.56]
0.19 [4.8]
1.900
[48.26]
2.28
[57.91]
MAX
MOUNTING INSERTS M3 X 0.5 ThRU, 4 PLACES
MAX. TORQUE, 8 IN/LBS
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
D
%. V
O
is output voltage prior to adjustment (3.3V, 5V, 12V,
15V, or 24V).
Radj - up = Vo(100 +
D
%)
_
(100 + 2
D
%) kW
1.225
D
%
D
%
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 operation.
(
)
Radj - down =
(
100%
-
2
)
kW
D
Power Electronics Division, Americas
3400 E Britannia Drive, Tucson, Arizona 85706
Tel: 800.547.2537 Fax: 520.295.4197
Any data, prices, descriptions or specifications presented herein are subject to revision by C&D Technologies, Inc. without notice. While such information is believed to be
accurate as indicated herein, C&D Technologies, Inc. makes no warranty and hereby disclaims all warranties, express or implied, with regard to the accuracy or complete-
ness of such information. Further, because the product(s) featured herein may be used under conditions beyond its control, C&D Technologies, Inc. hereby disclaims all
warranties, either express or implied, concerning the fitness or suitability of such product(s) for any particular use or in any specific application or arising from any course of
dealing or usage of trade. The user is solely responsible for determining the suitability of the product(s) featured herein for user’s intended purpose and in user’s specific
application. C&D Technologies, Inc. does not warrant or recommend that any of its products be used in any life support or aviation or aerospace applications.
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