TDK-Lambda LS Series User Manual

Contents

TDK-Lambda LS Series User Manual Manual pdf 19 page image

1・All specifications are subject to change without notice.LS Series Input Voltage RangeInput voltage range is single phase 88 - 264VAC (47 - 63Hz) or125 - 373VDC for LS25 to LS100.For LS150, selectable switch 115/230VAC will decide the inputvoltage range as mentioned in the table below.Input voltage which is out of specification, may damagethe unit. For cases where conformance to various safetyspecs(UL,CSA,EN) are required, input voltage range will be100 - 240VAC (50/60Hz).Note : LS series able to withstand Input Surge of 300VAC for 5 seconds.LS150 – Selectable voltage rangeSelected Range Applicable InputVoltage Range in VACApplicable InputVoltage Range in VDC115 88 - 132 NA230 176 - 264 248 - 373 Output Voltage RangeV.ADJ trimmer is for output voltage adjustment within the rangeof specifications. Turning the trimmer clockwise will increasethe output voltage. Note over voltage protection ( OVP) func-tion may trigger if the output voltage is increased excessively. Inrush CurrentPower Thermistor is built in to protect the circuit from InrushCurrent. Please select suitable input switch and fuse ratingin case of re-input the power at high temperature. Over Voltage Protection (OVP)The OVP function will shutdown the output except for LS25.The input need to be removed for a few minutes, and then re-input for recovery of the output. OVP setting is fixed and can-not be adjusted externally.Note : For LS25, OVP function will cause the output into ”hic-cup” mode and damage the unit. Over Current Protection (OCP)OCP function operates when the output current exceeds OCPspecifications. The output will automatically recover when theoverload condition is removed. Do not operate overload ordead short conditions for more than 30 seconds, which couldresult in damage or insulation failure. Output Ripple & NoiseRipple & noise are measured at 20MHz by using a 300mmtwisted pair of load wires terminated with a 0.1uF film capaci-tor & 47uF electrolytic capacitor. When load lines are longer,ripple becomes larger. The output ripple cannot be measuredaccurately if the probe ground lead of oscilloscope is too long.At low temperature, large ripple & noise may also be observeddue to large ESR of the internal Electrolytic Capacitors espe-cially at -25degC. Output voltage rise may not be smooth dur-ing initial turn on at low temperature.3. Explanation of Functions and Precautions• Input must be off when making connection.• Connect FG terminal to ground terminal of the equipment.• The output load line and input line shall be separated and twisted to improve noise immunity.LS25, LS35, LS50, LS75 LS100, LS1502. Terminal connecting method+LOAD-V+V-VL N ADJH+LOAD-L N V ADJ-V -V +V +V HMaximum output current of each output terminal is 25A except for LS25 (15A).If more than 25A, use 2 terminals