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50 Watt Single Output Half Brick Watt t Output u Br OBSOLETE PRODUCTrick DC/DC Converter
VKA50xSC
Contact Factory for Replacement Model
RoHS Compliant S Compliant a 18-36 V & 33 - 75V Input Range High Efficiency: 87% Typical at 5V 100 S Transient Response 50100% Load Step 420 kHz Fixed-Frequency Operation Remote Sense Operation o + Operation to +100 C Baseplate p Temperature Primary Remote On/Off, Choice of Pos/Neg Logic Adjustable Output Voltage Continuout Short-Circuit Protection Thermal Shutdown Case Ground Pin
The VKA50xSC Series DC/DC converters present an economical 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 VKA50xSC's proprietary control circuitry responds to 50-100% load steps in 100 Seconds to within 1% nominal Vout.
The patented fixed frequency architecture combined with surface mount technology results in a compact, efficient and reliable solution to DC/ DC conversion requirements. Safety per UL1950, EN 60950 and CSA 22.2 #234.
PRODUCT SELECTION CHART
MODEL VKA50LS03C VKA50LS05C VKA50LS12C VKA50LS15C VKA50LS24C VKA50MS03C VKA50MS05C VKA50MS12C VKA50MS15C VKA50MS24C INPUT VOLTAGE 24VDC (18-36) VOUT (VDC) 3.3V 5.0V 12.0V 15.0V 24.0V 3.3V 5.0V 12.0V 15.0V 24.0V IOUT (A) 10.0 10.0 4.2 3.3 2.1 10.0 10.0 4.2 3.3 2.1 EFFICIENCY MIN 80 85 87 88 89 81 86 88 89 89 TYP 81 86 88 89 90 82 87 89 90 90
48VDC (33-75)
THROUGH-HOLE SOLDERING INFORMATION
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 260C 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 175C. 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
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Technical enquiries - 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 TCASE = +40C 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 VIN = 16VDC VIN = 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 VIN = VINmax. 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 VOUT, Nom lOUT, Nom lOUT, Nom V VOUT, Nom Sec
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/Sec VOUT, 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 M pF A, rms
VISO = 240VAC, 60Hz
2000 180
GENERAL
400 12V & higher(4) Open Collector/Drain
420 -50% / +25%
440 0.5
KHz V VOUT, 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, VIN, TCASE (4) 3.3V Models Limited in Trim Down Range (5) Consult Factory for Details
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VKA50xSC.B01 Page 2 of 4
VKA50xSC
50 Watt Single Output Half Brick DC/DC Converter
TCASE = +40C 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
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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 %. VO 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 operation.
( Vo(100 + 1.225 (100
- 2) %
%) %
_
(100 + 2 %) %
)
Radj - down =
USA: UK: France: Japan:
Tucson (Az), Tel: (800) 547 2537, email: sales@murata-ps.com Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com Website: www.murata-ps.jp Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com
Canada: Toronto, Tel: (866) 740 1232, email: toronto@murata-ps.com
Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: sales@murata-ps.com ISO 9001 REGISTERED
07/28/08
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. (c) 2008 Murata Power Solutions, Inc.
Germany: Munchen, Tel: +49 (0)89-544334-0, email: munich@murata-ps.com
China:
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Technical enquiries - email: mk@murata-ps.com, tel: +44 (0)1908 615232
VKA50xSC.B01 Page 4 of 4

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