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 Manual3.4 Remote ON/OFF!The remote ON/OFF function is incorporated in the input circuitand operated with RC and -VIN.Table 3.1 Remote ON/OFF Specifi cationsON/OFF logic Between RC and -VIN Output voltageL level(0 - 1.2V) or shortONNegativeH level(3.5 - 7.0V) or openOFF!When RC is at low level, a current of 0.5mA typ will flow out.When Vcc is used, keep it within the following rage:3.5 [ VCC [ 7V.When remote ON/OFF is not used, short RC and -VIN.?DHS200, DHS2503.5 Remote sensing(1) When Remote Sensing is Not Used+S+VOUT-VOUT-S!When remote sensing is not used, make sure +VOUT and +S areshorted, and that -VOUT and -S are shorted as well.!Keep the patterns between +S and +VOUT and between -S and-VOUT as short as possible. Avoid a looping pattern. If noise entersthe loop, the operation of the power module will become unstable.(2) When Remote Sensing is UsedDHS200 +SDHS250+VOUT-VOUT-S+Co+ CoShort at pin root!Using remote sensing with long wires may cause output voltage tobecome unstable. Consult us if long sensing wiring is necessary.!Sensing patterns or wires should be as short as possible. If wiresare used, use either twisted-pair or shielded wires.DHS-20RC-VINRC-VINDHS200DHS250Opto couplerICRC-VINRC-VINTransistorRelayFig. 3.1 RC Connection ExampleVccFig. 3.2 When Remote Sensing is Not Used (DHS200/250)LoadWire as close as possibleLoadFig. 3.3 When Remote Sensing is Used (DHS200/250)!Use wide PCB patterns or thick wires between the power moduleand the load. Line drop should be kept less than 0.3V. Make sureoutput voltage from the power module stays within the specifi edrange.!If the sensing patterns are shorted by mistake, a large current mayfl ow and damage the pattern. This can be prevented by installingfuses or resistors close to the load.As wiring or load impedance may generate oscillation or largefluctuations in output voltage, make sure enough evaluation isgiven in advance.3.6 Adjustable voltage range!Output voltage between +VOUT and -VOUT can be adjusted byconnecting external resistors to TRM.!When the output voltage adjustment is not used, open the TRMpin respectively.!When the output voltage adjustment is used, note that the overvoltageprotection circuit operates when the output voltage setstoo high.!The wiring to the potentiometer should be as short as possible.As the ambient temperature fluctuation characteristics deterioratesdepending on the types of resistors and potentiometers used,please use resistors and potentiometers of the following specifi cations:Resistors ............. Metal fi lm type, coeffi cient less than±100ppm/CPotentiometers ... Cermet type, coeffi cient less than±300ppm/C!When the input voltage is 60 - 66VDC or 200 - 250VDC, the outputvoltage adjustment range becomes as shown in fi g . 3.4.Adjustment range [%]Adjustment range [%]1201109000120110100900060 66Input voltage [V]DHS50A, DHS100A?DHS50, DHS1005VOthers3.3, 5VOthers200 250Input voltage [V]DHS50B, DHS100B12011010060 66Input voltage [V]DHS200A!To increase the output voltage, turn the potentiometer clockwiseand connect in such a way that the resistance value between 2and 3 becomes small.To decrease the output voltage, turn the potentiometer counterclockwise.Adjustment range [%]Adjustment range [%]60001201101006000200 250Input voltage [V]DHS250BFig. 3.4 Output Voltage Adjustment Range5VOthers3.3, 5VOthers