Product Data Sheet 50 WATT SINGLE OUTPUT HIGH DENSITY DC/DC CONVERTER VKA50xS Series FEATURES DESCRIPTION 18 - 36V & 33 - 75V INPUT RANGE SMALL SIZE: 2.28" X 2.4" X 0.50" HIGH EFFICIENCY: 87% TYPICAL AT 5V 100 S TRANSIENT RESPONSE 50-100% LOAD STEP 420kHZ FIXED-FREQUENCY OPERATION OPERATION TO +100C BASEPLATE TEMP. PRIMARY REMOTE ON/OFF, CHOICE OF POS/NEG LOGIC ADJUSTABLE OUTPUT VOLTAGE REMOTE SENSE The VKA50xS 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 VKA50xS's proprietary control circuitry responds to 50-100% load steps in 100Seconds to within 1% nominal Vout. CONTINUOUS SHORT-CIRCUIT PROTECTION THERMAL SHUTDOWN SAFETY PER UL1950, EN 60950 AND CSA 22.2 #234 CASE GROUND PIN The patented fixed frequency architecture combined with surface mount technology results in a compact, efficient and reliable solution to DC/DC conversion requirements. Efficiency(%) Efficiency(%) Input Model VOUT VKA50LS05 24VDC VKA50LS12 VKA50LS15 VKA50LS24 (18-36) Input Note (1) (A) Min Typ Model 3.3V 10.0 80 81 VKA50MS03 5.0V 10.0 85 86 VKA50MS05 12.0V 4.2 87 88 VKA50MS12 Voltage (VDC) VKA50LS03 IOUT 15.0V 3.3 88 89 VKA50MS15 24.0V 2.1 89 90 VKA50MS24 VOUT Voltage (VDC) IOUT Note (1) (A) Min Typ 3.3V 10.0 81 82 48VDC 5.0V 10.0 86 87 12.0V 4.2 88 89 (33-75) 15.0V 3.3 89 90 24.0V 2.1 89 90 AGENCY APPROVALS Internet: http://www.cdpowerelectronics.com Power Electronics Division, United States Power Electronics Division, Europe 3400 E Britannia Drive, Tucson, Arizona 85706 Phone: 800.547.2537 Fax: 520.770.9369 C&D Technologies (Power Electronics) Ltd. 132 Shannon Industrial Estate, Shannon, Co. Clare, Ireland Tel: +353.61.474.133 Fax:+353.61.474.141 VKA50xS Rev B 4/99 Page 1 COMMON SPECIFICATIONS Specifications typical at TCASE = +40C, nominal input voltage, rated output current unless otherwise specified. PARAMETER INPUT Voltage Range VKA50LS VKA50MS Maximum Input Current VKA50LS VKA50MS Reflected Ripple Current Input Ripple Rejection No Load Input Current LS/MS Power Dissipation LS/MS No Load Standby, Primary On/Off Disabled LS/MS Inrush Charge VKA50LS VKA50MS Quiescent Operating Current Primary On/Off Disabled 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 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-12V & higher(4) Remote On/Off Control Inputs Primary Sink Current-Logic Low Vlow Vhigh Turn-on Time Weight CONDITIONS VIN = 16VDC VIN = 27VDC Peak - Peak DC to 1KHz MIN TYP MAX UNITS 18 33 24 48 36 75 VDC VDC 3.7 2.2 20 60 50/100 A A mA dB mA 3.6/4.8 0.18/0.4 W W 50 VIN = VINmax. 8 0 High Line to Low Line No Load to Rated Load 0.02 0.02 .02 1% DC to 20MHz BW test 125% 50 to 100% Load Step di/dt = 1.0A/Sec VOUT, 1% of Nominal Output Peak Test for 2 Seconds 0.520 0.360 mC mC 12 mA 50 1 0.05 0.05 W % % % %/C VOUT, Nom lOUT, Nom lOUT, Nom V 130% 110% 130% 2% 100 VOUT, Nom Sec 2000 180 VDC VDC VDC M pF A, rms 1500 1500 500 10 VISO = 240VAC, 60Hz 400 420 440 0.5 KHz V VOUT, Nom 1.0 1 2 12.5 85 (3.0) mA V V mSec g (oz.) +100 +125 C C +115 C C/W +300 C -50% / +25% Open Collector/Drain Within 1% of Rated Output 10.0 TEMPERATURE Operation/Specification Storage Case Temperature Case Temperature -40 -55 Shutdown Temperature Thermal Impedance, case-ambient Case Temperature +100 Lead Solder Temperature +25 +25 7.1 10 Seconds max ( ) See NOTES on page 3. Page 2 VKA50xs Rev B 4/99 ORDERING INFORMATION NOTES: (1) See Typical Performance Curves, page 3 VKA50 xSzz- (2) Continuous Mode (3) See graphs for Efficiency vs. Output Load, VIN, TCASE Device Family Indicates 50 Watt Regulated Unit (4) 3.3V Models Limited in Trim Down Range (5) Consult Factory for Details 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) TYPICAL PERFORMANCE CURVES TA = +40C, nominal input voltage, rated load, recommended external components applied, unless otherwise specified. EFFICIENCY vs OUTPUT LOAD EFFICIENCY vs OUTPUT LOAD 95 95 90 EFFICIENCY vs TEMPERATURE 28V 24V 15V 90 12V +10 Change in Efficiency (%) 3.3V 80 Efficiency (%) Efficiency (%) 5V 85 85 15V 80 28V 75 75 +5 TYP 100% Load 20% Load -5 24V 70 20 40 60 80 Output Load (% of Rated) 0 70 100 EFFICIENCY vs INPUT VOLTAGE -10 -55 100 50% Load -5 Normalized Output Ripple 100% Load Normalized Output Ripple TYP 1.25 1.00 0.75 10% Load -10 Vin, min Vin, typ Vin, max +25 Tcase (C) +65 +105 3.0 1.50 +5 -15 OUTPUT RIPPLE vs TEMPERATURE OUTPUT RIPPLE vs INPUT VOLTAGE +10 Change in Efficiency (%) 20 40 60 80 Output Load (% of Rated) 0 2.0 1.0 0.5 0.33 0.50 Vin, min Vin, typ Vin, max -15 -55 +25 +65 +105 Tcase (C) +100 Vin (VDC) REFLECTED RIPPLE CURRENT vs TEMPERA TURE POWER DERATING WITH NO HEATSINK 16 POWER DERATING WITH NO HEATSINK 14 +50 Dissipated Power, Po (W) 12 TYP 10 -50 -100 -55 -15 +25 Tcase (C) +65 +105 Dissipated Power, PD (W) Change in Reflected Ripple Current (%) Vin (VDC) 8 6 4 2 22 20 18 16 14 12 400 LFM 200 LFM Airflow 400 LFM Airflow 200 LFM Natural Convection 10 8 Natural Convection 6 4 2 0 0 0 25 25 50 50 75 75 Ambient Temperature (C) Ambient Temperature (C) VKA50xS Rev B 4/99 100 100 Page 3 MECHANICAL NOTES: All dimensions are in inches (millimeters). PIN PLACEMENT TOLERANCE: 0.005" MECHANICAL TOLERANCE: 0.015" 0.530 MAX [13.46] Marked with: specific modeL ordered, date code, job code. 0.20 [5.1] .040 [1.02] DIA. 7 PLACES 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. .081 [2.06] DIA. 2 PLACES 0.20 [5.1] 0.50 [12.7] .400 [10.16] 0.40 [10.16] 2.000 [50.80] 0.700 [17.78] 1.000 [25.40] 2.40 [61.0] MAX 1.000 [25.40] 1.400 [35.56] 1.400 [35.56] MOUNTING INSERTS M3 X 0.5 THRU, 4 PLACES MAX. TORQUE, 8 IN/LBS 1.900 [48.26] 0.19 [4.8] 2.28 [57.91] MAX OUTPUT VOLTAGE ADJUST OVP NOTE 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, 24V or 28V). 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 - up = ( Radj - down = Page 4 Vo(100 + %) 1.225 % (100 - 2) % _ (100 + 2 %) % ) k k VKA50xs Rev B 4/99