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OBSOLETE PRODUCT
PRODUCT OVERVIEW
75 Watt Single O Contact Factory for Replacement Watt Single Output Half Brick DC/DC Converter Modelg
VKA75xSC Series
The VKA75xSC 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 VKA75xSC's proprietary control circuitry responds to 50-100% load steps in 100mSeconds 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.
FEATURES
RoHS Compliant 18-36 V & 33 - 75V Input Range High Efficiency: 87% Typical at 5V 100mS Transient Response 50-100% Load Step 420 kHz Fixed-Frequency Operation Remote Sense Operation to +100C Baseplate Temperature Primary Remote On/Off, Choice of Pos/Neg Logic Adjustable Output Voltage Continuout Short-Circuit Protection Thermal Shutdown Case Ground Pin UL/CUL 60950, VDE EN60950
PRODUCT SELECTION CHART
MODEL VKA75LS02C VKA75LS03C VKA75LS05C VKA75LS12C VKA75LS15C VKA75LS24C VKA75MS02C VKA75MS03C VKA75MS05C VKA75MS12C VKA75MS15C VKA75MS24C INPUT VOLTAGE 18-36Vdc 18-36Vdc 18-36Vdc 18-36Vdc 18-36Vdc 18-36Vdc 33-75Vdc 33-75Vdc 33-75Vdc 33-75Vdc 33-75Vdc 33-75Vdc VOUT (VDC) 2.0V 3.3V 5.0V 12.0V 15.0V 24.0V 2.0V 3.3V 5.0V 12.0V 15.0V 24.0V IOUT (A) 15.0 15.0 15.0 6.3 5.0 3.1 15.0 15.0 15.0 6.3 5.0 3.1 EFFICIENCY MIN 75 80 85 87 88 89 76 81 86 88 89 89 TYP 76 81 86 88 89 90 77 82 87 89 90 90
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.
For full details go to www.murata-ps.com/rohs
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MCD_VKA75C Series.D01 Page 1 of 4
75 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 VKA75LS VKA75MS Maximum Input Current VKA75LS VKA75MS Reflected Ripple Current Input Ripple Rejection No Load Input Current LS/MS
VKA75xSC Series
UNITS
CONDITIONS
MIN
TYP
MAX
18 33 VIN = 16VDC VIN = 27VDC Peak - Peak DC to 1KHz
24 48
36 75 5.5 3.3
VDC VDC A A mA dB mA W W
INPUT
50
20 60 50/100 3.6/4.8 0.18/0.4 0.520 0.360 8 12
Power Dissipation LS/MS No Load Standby, Primary On/Off Disabled LS/MS Inrush Charge VIN = VINmax. VKA75LS VKA75MS Quiescent Operating Current Primary On/Off Disabled
mC mC mA
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
75
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
1 0.02 0.2 .02 1% 130% 120% 125% 2% 100
0.05 0.5
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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Technical enquiries - email: mk@murata-ps.com, tel: +44 (0)1908 615232
MCD_VKA75C Series.D01 Page 2 of 4
75 Watt Single Output Half Brick DC/DC Converter
VKA75xSC Series
TCASE = +40C nominal input voltage unless otherwise specified.
TYPICAL PERFORMANCE CURVES
*
Power Dissipation (W)
Ambient Air Temperature (C)
VKA75 xSzz Device Family Indicates 75 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 C Not all model configurations are available. The following are the defined and active models: VKA75LS05-1C VKA75LS05C VKA75LS12-1C VKA75LS12C VKA75LS15C VKA75LS24C VKA75MS03C VKA75MS05C VKA75MS12C VKA75MS24C
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ORDERING INFORMATION
Technical enquiries - email: mk@murata-ps.com, tel: +44 (0)1908 615232
MCD_VKA75C Series.D01 Page 3 of 4
75 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]
VKA75xSC Series
PIN PLACEMENT TOLERANCE: 0.005" MECHANICAL TOLERANCE: 0.015" Marked with: specific modeL ordered, date code, job code.
.040 [1.02] DIA. 7 PLACES .081 [2.06] DIA. 2 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 brass; lead finish is matte tin (100-300 micro-inches) over a nickel barrier layer (5-40 micro-inches)."
0.40 [10.16]
.400 [10.16]
2.000 [50.80] 1.000 [25.40] 2.40 [61.0] MAX
VKA75xSC
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%) %
)
Radj - down =
(100%2) -
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
03/04/08
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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MCD_VKA75C Series.D01 Page 4 of 4

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