title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

AC-DC Power Supplies Open Frame/ Enclosed TypeInstruction Manual1.6 Output ripple and ripple noise!Output ripple noise may be infl uenced by measurement environment,measuring method fi g.1.1 is recommended.Osiloscope/Ripple noise meterBw:20MHz+Vout-VoutRemarks :When GND cable of probe with fl ux of magnetic force from powersupply are crossing, ripple and ripple noise might not measurecorrectly.Please note the measuring environment.C1C2150mmC1 : Film capacitor 0.1μFC2 : Aluminum electrolytic capacitor 22μFLoadDifferential probeFig.1.1 Measuring method of Ripple and Ripple Noise+? LFA100F, LFA150F, LFA240F, LFA300F!As for option -R2, reducing standby power is possible by OFF signalof the remote control.Please refer to instruction manual 6.1.2 Series Operation andParallel Operation2.1 Series Operation? LFA10F, LFA15F, LFA30F, LFA50F, LFA75F!Series operation is available by connecting the outputs of two ormore power supplies with the same output voltage, as shown below.Output current in series connection should be lower than thelowest rated current in each unit.Power +Supply -Power +Supply -12V or lessD1D3D2D4LoadPower +Supply -Power +Supply -15V or moreD1D2LoadD1-D4 : Use a schottky barrierdiode with low forwardvoltage.D1,D2 : Use a schottky barrierdiode with low forwardvoltage.Fig.2.1 Examples of connecting in series operation (a)Bad exampleGood exampleFig.1.2. Example of measuring output ripple and ripple noise1.7 Isolation!For a receiving inspection, such as Hi-Pot test, gradually increase(decrease) the voltage for the start (shut down). Avoid using Hi-Pot tester with the timer because it may generate voltage a fewtimes higher than the applied voltage, at ON/OFF of a timer.1.8 Reducing standby power? LFA10F, LFA15F!A circuit reducing standby power is built in LFA10F and LFA15F.(standby power : 0.5W typ)The load factor: Io=0-35%, the internal switch element is intermittentoperated, and the switching loss is decreased.The specification of the Ripple/Ripple Noise changes by thisintermittent operation. The value of the ripple/ripple Noise whenintermittent operates changes in the input voltage and the outputcurrent.Please contact us for details.Power +Supply -Power +Supply -Fig.2.2 Examples of connecting in series operation (b)? LFA100F, LFA150F, LFA240F, LFA300F!You can use a power supply in series operation. The output currentin series operation should be lower than the rated current of apower supply with the lowest rated surrent among power suppliesthat are serially connected. Please make sure that no surrent exceedingthe rated current fl ows into a power supply.Power +Supply -Power +Supply -**LoadLoad LoadPower +Supply -Power +Supply -* Only LFA300F -3R3 and -5.Use a schottky barrier diodewith low forward voltage.(a)(b)Fig.2.3 Examples of connecting in series operationLoadLoadLFA-26