title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

AC-DC Power Supplies Bus Converter . Power Module TypeTUNS50F, TUNS100FInstruction Manual!The output voltage may become unstable at low temperature dueto the ESR of power thermistor. In this case, increase the capacitanceof Cbc more than recommended value or connect samecapacitors in parallel. Please evaluate before use.2.2 Wiring output pin(1) Co : Output capacitor!Install an external capacitor Co between +VOUT and -VOUT pinsfor stable operation of the power supply (Fig.1.1).Recommended capacitance of Co is shown in Table 2.3.!Select the high frequency type capacitor. Output ripple and startupwaveform may be infl uenced by ESR-ESL of the capacitor andthe wiring impedance.!Install a capacitor Co near the output pins (within 50mm from thepins).!When the power supply is used under 0C ambient temperature,output ripple voltage increases. In this case, connect 3 capacitorsCo in parallel connection.Table 2.3 Recommended capacitance Co[μF]ModelTemperature of base plateTc=0 to +100C Tc=-40 to +100COutput voltage(V)TUNS50FTUNS100FTUNS50FTUNS100F5220022002200×32200×312470470470×3470×324220220220×3220×3The specifi ed ripple and ripple noise are measured by the methodintroduced in Fig.2.1.AC INF1C4 :5V,12V 10mF24V 4.7mFNoisefilterFGTH150mm+S+VOUTC1AC1TUNS50FTUNS100FAC2 -VOUTCoFG+BC-BC-SCbc+C2CY+1.5m50WCoaxialCableC4 LoadRCOscilloscopeBW:100MHzR=50WC=0.01mF+S, -S : TUNS100FFig.2.1 Method of Measuring Output Ripple and Ripple Noise2.3 Wiring +BC/-BC pins(1) Cbc : Smoothing capacitor for boost voltage!In order to smooth boost voltage, connect Cbc between +BC and-BC. Recommended capacitance of Cbc is shown in Table2.4.!Note that +BC and -BC terminals have high voltage (DC385V typ).!Keep the capacitance within the allowable external capacitance.!Select a capacitor of which the boost voltage ripple voltage doesnot exceed 30Vp-p.!When the power supply is operated under -20C, it may makethe boost voltage unstable due to the characteristic of equivalentseries resistor. Please choose the capacitor which has more thanrecommended capacitance.Table 2.4 Recommended capacitance CbcNo.ModelVoltageCbcAllowablecapacitance range1TUNS50FDC420V82μF47 to 150μF2TUNS100For more120μF68 to 220μF(2) C2 : Capacitor for boost voltage!Install external capacitors C2 with capacitance shown in table 2.5.!If capacitors C2 are not installed, it may cause the failure of thepower supply or external components.Table 2.5 Recommended capacitance C2Rated rippleNo. Model Voltage Capacitancecurrent1 TUNS50F0.47μF or more 1A or moreDC450V2 TUNS100F 0.47μF or more 1A or more3 Function3.1 Input voltage range!The input voltage range is from 85 VAC to 264 VAC.!In cases that conform with safety standard, input voltage range isAC100-AC240V(50/60Hz).!Be aware that use of voltages other than those listed above mayresult in the unit not operating according to specifi cations, or maycause damage. Avoid square waveform input voltage, commonlyused in UPS and inverters.3.2 Overcurrent protection!Overcurrent protection is built-in and comes into effect over 105%of the rated current.Overcurrent protection prevents the unit from short circuit andovercurrent condition. The unit automatically recovers when thefault condition is cleared.!When the output voltage drops at overcurrent, the average outputcurrent is reduced by hiccup operation of power supply.3.3 Overvoltage protection!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 note that devices inside the power supply might fail whenvoltage of more than rated output voltage is applied to output terminalof the power supply. This could happen when the customertests the overvoltage performance of the unit.To check the function of overvoltage protection, adjust the outputvoltage by changing TRM voltage. Please contact us for details.TUNS-20