(EDLC) Application Note No. C2M1CXS-163A(E) Suggestion of the Supercapacitor(EDLC) Application to the Electrical Characteristic Tester

1. Summary Supercapacitor, also known as EDLC or supercap, has higher-capacity than or . And supercapacitor is an energy storage device having longer life than a battery. In addition, Murata’s supercapacitor can handle the output power up to 50W by realizing super low ESR approximately 40mΩ (DMF series example) At the measurement environment that a high peak electric current runs through the load instantly, our supercapacitor can assist such peak current. By this effect, it is possible to downsize Fig.3 : Measurement Block Diagram with Supercapacitor and reduce power capacity of DC . Besides it contributes to reduce measuring equipment cost and save the Fig.4 and Fig.5 shows each part waveform. electric power of the facilities. Top(Yellow):Load current, Middle(Green):Power line voltage,

Bottom(Purple):DC power supply current. 2. Benefits Fig.4: DC power supply only. ①Downsize the DC power supply Fig.5: Supercap is added to DC power supply. Even if the power supply capacity cannot support a peak current, The effect of supercap can be confirmed because the fluctuation it does not matter because supercap can assist it. ②Supercapacitor as a power source of the input voltage is smaller and the peak current of power Because supercap can be charged quickly, it is possible to use supply decreases. supercap as power source at the time of measurement. ③Reduce the cost and Save power of measurement equipment. ④Can be mounted on limited area because of its thinner and

smaller shape.

Fig.4: without Supercap Fig.5: with Supercap

Hand Fig.1 : without supercapacitor RoHS REACH Soldering 4. Line-up Only

Operating Rated Cap. ESR L x W t Series Part Number Temp. Voltage [mF] [mohm] [mm] [mm] (°C) 2.2 DMT3N4R2U224M3DTA0 220 300 21 x 14 General - (2.5Max) DMT Purpose 4.2V -40 to 85 3.5 Type DMT334R2S474M3DTA0 470 130 21 x 14 (3.8Max) 3.2 High DMF3Z5R5H474M3DTA0 470 45 21 x 14 5.5V (3.4Max) DMF Power -40 to 70 (Peak) 3.7 Type DMF4B5R5G105M3DTA0 1000 40 30 x 14 Fig.2 : with supercapacitor (4.0Max)

Power source can be downsized by using supercap

for assisting peak current

3.The Effect Explanation Fig.3 shows the electrical characteristic measurement block 5.Sample and Technical Support diagram using supercap. Because supercap is connected to DC  Please feel free to ask our sales office or the authorized agent. power supply in parallel, it can cover the transient peak electric  Please refer to our website for more information. current which DC power supply cannot support alone. Because of http://www.murata.com/en-global/products/capacitor/edlc this effect, it is possible to reduce the fluctuation of power line and C2M1CXS-053: Supercapacitor Technical Note the current of power supply. As a result, power capacity of DC power supply can be reduced. Co.,Ltd. Page 1 / 1