title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

DC-DC Converters Bus Converter-Power Module TypeInstruction Manual(2) Constant current adjustment by external voltage!By applying a voltage externally to ITRM, output current for constantcurrent becomes adjustable.When the ITRM terminal voltage is set at less than 1.0 V, the constantcurrent set value can be changed.The voltage betweenOutput current [A] = ITRM and -S[V]×Rated output current [A] ...21.0 [V]!Do not set the external applied voltage of the terminal to -0.3 V orless, and 5.0 V or more.!During operation, please change the voltage at the ITRM terminalgradually (no more than 0.01 V/ms). A sudden change may causeinstability in constant current operation.0.1μF100kΩPGPGGFig.3.9 Internal circuit of PG3.9 AUX for Power good circuit!The AUX can be used as the power source for PG circuit.!AUX is designed as shown in Fig.3.10, and a resistor (1.1kΩ) isbuilt in to protect the short circuit. Output voltage decreases as theoutput current increases.5V1kΩ4.7kΩITRM12V typ1.1kΩAUX0.01μF-S-SFig.3.10 AUX circuitFig.3.8 ITRM circuitNote :!If the output voltage becomes less than 5% of the rated voltageduring constant current operation, the output may become unstable.3.8 Power good (PG)!By using PG, it is possible to monitor power supply whethernormal operation or abnormal operation. The PG signal is“Low”when the power supply operates correctly. The signal turns to“High”when the power supply stops.!PG circuit is designed as shown in Fig.3.9. Sink current of PG is15mA max.Notes when you use PG signal are shown below.1 The PG signal is“High”when the output voltage is 20% or lessof the rated output voltage or 60% or less of the output voltagesetting value,2 The PG signal is“Low”when the power supply operates duringconstant current.Table 3.2 Specifi cation of PGNo.ItemPG1FunctionNormal operation“Low”The power supply stops“High”2Base pin-S3Level voltage“L”0.5V max at 5mA4Level voltage“H”Open corrector5Maximum sink current15mA max6Maximum applied voltage50V maxDCS-113.10 Withstanding Voltage/Isolation Voltage!When testing the withstanding voltage, make sure the voltageis increased gradually. When turning off, reduce the voltagegradually by using the dial of the hi-pot tester. Do not use avoltage tester with a timer as it may generate voltage severaltimes as large as the applied voltage.4 Series and ParallelOperation4.1 Series operation!It is possible to connect multiple output voltages in series in orderto obtain higher output voltage.!The maximum combined output voltage of series operation is400V.Notes :1 Please note that the maximum current available to the load isequal to the current of the lowest rated supply in the string.2 In case of malfunction (Failure or protection circuit activation),please stop the operation and replace the failed power supply.PowerPower++SupplySupply-Load-LoadPower +Power +LoadSupply-Supply -（a）（b）Fig.4.1 Examples of connecting in series operation