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(5) Operation with AC input!The DHS series handles only for the DC input.A front end unit(AC/DC unit) is required when the DHS series isoperated with AC input.(6) Reverse input voltage protection!Avoid the reverse polarity input voltage. It will break the powersupply.It is possible to protect the unit from the reverse input voltage byinstalling an external diode.YES(a)NOYESDCACACAC/DC+VINDC IN-VIN2.2 Wiring output pin!Install an external capacitor Co between +VOUT and -VOUT pinsfor stable operation of the power supply.Recommended capacitance of Co is shown in Table 2.2.!Select the high frequency type capacitor. Output ripple and startupwaveform may be infl uenced by ESR ESL of the capacitor andthe wiring impedance.!Install a capacitor Co near the output pins(within 50mm from thepins).Table 2.2 Recommended capacitance Co [ F]ModelTemparature of Base plateTbp=0+100Tbp=-40+100Output voltage (V)DHS50/100DHS200/250DHS50/100DHS200/2503.3220022002200X32200X35220022002200X32200X37.5-2200-2200X3124701000470X31000X3154701000470X31000X324220470220X3470X328220470220X3470X348-330-330X3!The specifi ed ripple and ripple noise are measured by the methodintroduced in Fig. 2.5.(b)DHSDHSDHSFig.2.3 Use with AC input+VINDC IN-VINFig.2.4 Reverse input voltage protectionLoadLoadLoadDCinputCin2200pFFG+S+VIN+VOUT+ RC-VIN2200pFFGOscilloscopeBW:100MHz3 Function3.1 Overcurrent protection!Over Current Protection (OCP) is built in and works over 105% ofthe rated current or higher. However, use in an over current situationmust be avoided whenever possible. The output voltage of thepower module will recover automatically if the fault causing overcurrent is corrected.When the output voltage drops after OCP works, the power moduleenters a”hiccup mode”where it repeatedly turns on and off ata certain frequency.3.2 Overvoltage protection!Over Voltage Protection (OVP) is built in. When OVP works, outputvoltage can be recovered by shutting down DC input for atleast one second or by turning off the remote control switch forone second without shutting down the DC input. The recoverytime varies according to input voltage and input capacitance.Remarks:Note that devices inside the power module may fail when a voltagegreater than the rated output voltage is applied from an externalpower supply to the output terminal of the power module. Thiscould happen in in-coming inspections that include OVP functiontest or when voltage is applied from the load circuit. OVP can betested by using the TRM terminal. Consult us for details.3.3 Thermal protection-VOUTR=50 100mm+S, -S : DHS200/250C1:3.3 - 15V 10 F24 - 28V 4.7 F48V 2.2 F!Over Temperature Protection (OTP) is built in. If the base platetemperature exceeds 100C, OTP will work, causing the outputvoltage to drop. Output voltage can be recovered by shuttingdown DC input for at least one second or by turning RC off for onesecond without shutting down the DC input.-SRCCo +Measuring boardC11.5m 50Coaxial CableR=50C=0.01 FLoadFig.2.5 Method of Measuring Output Ripple and Ripple NoiseDHS-19