title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

AC-DC Power Supplies Medical TypeInstruction Manual1 Functionto operate a motor, etc., please install an external diode on theoutput terminal to protect the unit.1.5 Thermal protection1.1 Input voltage range!The range is from AC85V to AC264V.(please see SPECIFICATIONS for details).!In cases that conform with safety standard, input voltage range isAC100 - AC240V (50/60Hz).!If input value doesn’t fall within above range, a unit may not operatein accordance with specifi cations and/or start output voltagehunting or fail.If you need to apply a square waveform input voltage, which iscommonly used in UPS and inverters, please contact us.!When the input voltage changes suddenly, the output voltage accuracymight exceed the specifi cation. please contact us.1.2 Inrush current limiting!An inrush current limiting circuit is built-in.!If you need to use a switch on the input side, please select onethat can withstand an input inrush current.!Thermistor is used in the inrush current limiting circuit. When youturn the power ON/OFF repeatedly within a short period of time,please have enough intervals so that power supply cools downbefore being turned on.!Surge current in the fi lter unit does not include (0.2ms or less).1.3 Overcurrent protection!An overcurrent protection circuit is built-in and activated over105% of the rated current. A unit automatically recovers when afault condition is removed.Please do not use a unit in short circuit and/or under an overcurrentcondition.!Hiccup Operation ModeHiccup operation for overcurrent protection is included in a part ofseries. When the overcurrent protection circuit is activated and theoutput voltage drops to a certain extent, the output becomes hiccupso that the average current will also decrease.!Output voltage shuts down when the output voltage continuouslydrops due to overcurrent protection.!Output voltage recovers from overcurrent protection by shuttingdown the input voltage and waiting more than 3 minutes then turningon AC input again.1.4 Overvoltage protection!Over Temperature Protection (OTP) is built-in.This protection circuit may be activated under the following conditionsand shut down the output.1 When a temperature continue to exceed the values determinedby the derating curve.2 When a current exceeding the rated current is applied.3 When convection stops.If the protection circuit is activated, shut off the input voltage andeliminate all the overheating conditions. To recover the outputvoltage, have enough time to cool down the unit before turning onthe input voltage again.Remarks :Please comply with recommended mounting method in“Assemblingand Installation Method”and“Derating”.1.6 Output voltage adjustment range!To increase an output voltage, turn a built-in potentiometer clockwise.To decrease the output voltage, turn it counterclockwise.1.7 Output ripple and ripple noise!Output ripple noise may be infl uenced by measurement environment,measuring method Fig.1.1 is recommended.+Vout-VoutOsiloscope/Ripple noise meterBw:20MHzC1C2150mmC1 : Film capacitor 0.1μFC2 : Aluminum electrolytic capacitor 22μF+LoadDifferential probeFig.1.1 Measuring method of Ripple and Ripple NoiseRemarks :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.!An overvoltage protection circuit is built-in. If the overvoltage protectioncircuit is activated, shut down the input voltage, wait morethan 3 minutes and turn on the AC input again to recover the outputvoltage. Recovery time varies depending on such factors asinput voltage value at the time of the operation.Remarks :Please avoid applying a voltage exceeding the rated voltage to anoutput terminal. Doing so may cause a power supply to malfunctionor fail. If you cannot avoid doing so, for example, if you needGMA-7Bad exampleGood exampleFig.1.2 Example of measuring output ripple and ripple noise