title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

DC-DC Converters PCB Mount TypeMG15, MG30, MG40, MG80Instruction ManualRC-VinRC-VinOpto couplerICRC-VinRC-VinFig.1.2 RC Connection ExampleTransistor1.7 Thermal protection (MG40/MG80)RelayVcc!When the power supply temperature is kept above the valuesdetermined by the derating curve, the thermal protection will beactivated and simultaneously shut down the output.In this case, the unit should be cool down, and then recovery fromthermal protection is accomplished by cycling the DC input poweroff for at least 1 second, or toggling Remote ON/OFF signal.2 Wiring to Input/OutputPin2.1 Wiring input pin(1) External fuse? MG15, MG30!Fuse is built-in on input side.? MG40, MG80!Fuse is not built-in on input side. In order to protect the unit, installthe normal-blow type fuse on input side.!When the input voltage from a front end unit is supplied to multipleunits, install the normal-blow type fuse in each unit.(2) External capacitor on the input side!MG series has Pi-shaped fi lter internally.You can add a capacitor Ci near the input pin termilal and reducerefl ected input noise from the converter. Please connect the capacitoras needed.!When you use a capacitor Ci, please use the one with high frequencyand good temperature characteristics.!If the power supply 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 supply.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 MG series is long, notonly the refl ected input noise becomes large, but also the outputof the converter may become unstable. In such case, connectingCi to the input pin is recommended.!If you use an aluminum electrolytic capacitor, please pay attentionto the ripple current rating.InputLCi+Vin-VinFig.2.2 Connecting an External Capacitor to the Input SideTable 2.2 Recommended Capacitance of an External Capacitor on the Input Side [ F]ModelInput Voltage[V]MG15MG30MG40MG8012220220241001004847475-12 (MGF)22012-24 (MGF)10010010010024-48 (MGF)47474747*Please adjust the capacitance in accordance with a degree of theeffect you want to achieve.InputCiFuse+Vin-Vin!If a reverse polarity voltage is applied to the input pin, the powersupply will fail.If there is a possibility that a reverse polarity voltage is applied,connect a protection circuit externally as described below.Fig.2.1 Connecting Example of an External Capacitor to the Input SideTable 2.1 Recommended fuse (normal-blow type)ModelInput Voltage[V]MG40MG805-12 (MGF)15A12-24 (MGF)10A15A24-48 (MGF)5A10AInputFuseSchottky BarrierDiode+Vin-VinFig.2.3 Connecting a Reverse Voltage Protection CircuitMG-82