title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

DC-DC Converters PCB Mount Value-added TypeInstruction Manual1.7 Output ripple and ripple noise!The specifi ed ripple and ripple noise are measured by the methodintroduced in Fig 1.2.!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.+VoutFuse+Vin-VoutLoadInputSchottky BarrierDiode-VinFig.2.2 Connecting a Reverse Voltage Protection CircuitOscilloscopeBW : 100MHzRCCoaxial CableFig1.2 Method of Measuring Output Ripple and Ripple Noise3 Input Voltage/Current Range1.8 Thermal protection (STMGFS80)!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.Noise2 Wiring Input terminal!If you use a non-regulated power source for input, please checkand make sure that its voltage fl uctuation range and ripple voltagedo not exceed the input voltage range shown in specifi cations.!Please select an input power source with enough capacity, takinginto consideration of the start-up current (Ip), which fl ows when aDC-DC converter starts up.Input Voltage RangeInput Current [A]Ip!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 terminals.!If an external fi lter containing L (inductance) is added to the inputline or a wire from the input source to the STMG 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 terminal is recommended.!If you use an aluminum electrolytic capacitor, please pay attentionto the ripple current rating.Input Voltage [V]Fig.3.1 Input Current CharacteristicsL+VinInputCi-VinFig.2.1 Connecting an External Capacitor to the Input SideSTMG-22