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COSEL Power Supply, Noise Filter 2025 Product Catalog
DC-DC Converters PCB Mount TypeInstruction Manual+VinRC+VinRC+VinRC2 Wiring to Input/OutputPin Terminals-Vin-Vin-VinInput 5V Input 12V Input 24, 48VFig.1.4 Examples of Using an External Remote ON/OFF CircuitTable 1.2 Specifi cation of Remote ON/OFFVoltage Level of the pin terminal RC (VRC) SU/SUC3/SUT3, SU/SUC6/SUT6 OutputOpen or Short or 0V[VRC[0.3VON2.0V[VRC[9.0VOFF!Please keep the voltage level of the pin terminal RC (VRC) at 9.0Vor below.!If you do not use the Remote ON/OFF function, please short outbetween the pin terminals RC and -Vin to prevent malfunction.(2) SU/SUC10/SUT10!The output of the power supply turns ON when the pin terminalRC is connected to the pin terminal -Vin. When the pin terminalRC is open or the voltage of the pin terminal RC is between 2.4 to7.0 V, the output of the power supply goes OFF.!When the voltage of the pin terminal RC is between 1.2 to 2.4V,an output voltage value may be an uncertain value which is lessthan the rated voltage.!Please see the following diagram for how to use the pin terminalRC.VccRC-VinororTransistorICRelayFig.1.5 Examples of Using an External Remote ON/OFF Circuit!Basically, SU/SUC/SUT series do not need any external capacitor.However, you can create a P-shaped fi lter circuit by adding acapacitor Ci near the input pin terminal and reduce refl ected inputnoise from a converter. Please connect the capacitor as needed.!When you use a capacitor Ci, please use the one with high frequencyand good temperature characteristics.!If the power module is to be turned ON/OFF directly with a switch,inductance from the input line will induce a surge voltage severaltimes that of the input voltage and it may damage the power module.Make sure that the surge is absorbed, for example, by connectingan electrolytic capacitor between the input pins.!If an external fi lter containing L (inductance) is added to the inputline or a wire from the input source to the DC-DC converter islong, not only the reflected input noise becomes large, but alsothe output of the converter may become unstable. In such case,connecting Ci to the input pin terminal is recommended.!If you use an aluminum electrolytic capacitor, please pay attentionto its ripple current rating.InputLCi+Vin-VinFig.2.1 Connecting an External Capacitor to the Input SideTable 2.1 Recommended Capacitance of an External Capacitor on the Input Side [ F]ModelInput Voltage(V)SU/SUC1R5 SU/SUC3/SUT3 SU/SUC6/SUT6 SU/SUC10/SUT10510 - 10010 - 22010 - 47010 - 4701210 - 4710 - 10010 - 22010 - 2202410 - 3310 - 4710 - 10010 - 100484.7 - 1010 - 2210 - 4710 - 47Table 1.3 Specifi cation of Remote ON/OFFVoltage Level of the pin terminal RC (VRC) SU/SUC10/SUT10 OutputShort or 0V[VRC[1.2VONOpen or 2.4V[VRC[7.0VOFF!When the pin terminal RC is at the”Low”level, outfl owing currentis 0.5mA typ. When Vcc is used, please make sure that the voltageof Vcc is 7.0V or less.!If you do not use the Remote ON/OFF function, please short outbetween the pin terminals RC and -Vin.*Please adjust the capacitance in accordance with a degree of theeffect you want to achieve.!If a reverse polarity voltage is applied to the input pin terminal, thepower supply will fail.If there is a possibility that a reverse polarity voltage is applied,connect a protection circuit externally as described below.(a)Schottky Barrier Diode+VinInput-VinSchottky barrier diode generates a power lossof input current multiplied by forward voltage.SU . SUC/SUT-53
