title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

DC-DC Converters POL TypeInstruction Manual!When the remote sensing function is not in use, it is necessary toconfi rm that pins are shorted between +S & +VOUT and between-S & GND.!Wire between +S & +VOUT and between -S & GND as short aspossible.Loop wiring should be avoided.This power supply might become unstable by the noise comingfrom poor wiring.+VOUTTRMGNDR TRMLoad(2) When the remote sensing function is in useWire as close as possible+VOUT+SLoad-SGNDFig.3.3 Connection when the remort sensing is in use!Twisted-pair wire or shield wire should be used for sensing wire.!Thick wire should be used for wiring between the power supplyand a load.Line drop should be less than 0.5V.Voltage between +VOUT and GND should remain within the outputvoltage adjustment range.!If the sensing patterns are short, heavy-current is drawn and thepattern may be damaged.The pattern disconnection can be prevented by installing the protectionparts as close as possible to a load.3.4 Adjustable voltage range!Output voltage is adjustable by the external resistor.!The temperature coffi ciect could become worse, depending on thetype of a resistor.Resistor---Metal fi lm type,coeffi cient of less than±100ppm/C!When TRM is opened, output voltage is 0.6V.!RTRM is calculated in the following expressions.Fig.3.4 Connecting RTRM!Please use the output voltage in the operating area of Fig.3.5Transient responsce may worsen when used in vicinity of the borderof the operating area.!Only for output voltage is rising and output current is small, thereis a possibility that the ripple voltage is high value. If the ripplevoltage value is problem, connecting a capacitor of table 2.4value.Input Voltage [V]14.41412108.5864Connect an external capacitorOperating area20 0. 5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.50.6Output Voltage [V]Fig.3.5 Operating area of BRNS series!When start of DC INPUT is slow, BRNS may start on the outsideof the operating area.By the circuit of the Fig.3.6, you can raisethe start-up voltage.DCINPUT+VINRC6.5GNDBRNS-9Table.3.2 Calculation result of RTRMNo.+VOUTRTRM10.6OPEN21.220.00kΩ31.810.00kΩ42.56.32kΩ53.34.44kΩ65.02.73kΩFig.3.6 RC circuit for start up3.5 Softstart / Start-up sequence!The adjustment of the rise time is possible by connecting CSEQ.CSEQ[nF] = 6×T RISE [ms] - 15!CSEQ should be less than 1μsec.!At the time of start, the output voltage follows the SEQ voltage.Output voltage and SEQ voltage are expressed in the followingcalculation.