Alternative to supercapacitors delivers high capacitance at low ESR

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Cooper Bussmann has introduced ultra-high-value capacitors up to 1.5F for memory and Real-Time Clock (RTC) back-up, which have significantly lower Equivalent Series Resistance (ESR) than existing supercapacitors or Electrochemical Double Layer Capacitors (EDLCs).

The PowerStor® KR series capacitors are 5.5V-rated devices that display ultra-low leakage current to maintain stored charge for long periods. Low leakage also minimises battery-drain in portable equipment. The high capacitance values of the KR series enable critical equipment functions to continue or to be completed in a controlled manner during battery swap-out or mains failure.

The new capacitors use carbon aerogel technology to achieve energy density greater than 10J/cm3. There are eighteen devices in the KR series, which comprises 0.1F, 0.22F, 0.33F, 0.47F, 1.0F and 1.5F capacitors in cylindrical, horizontal-mount and verticalmount coin-cell-style packages. Sizes range from 11.5mm diameter and 5mm thickness to 21.5mm diameter and 7.5mm thickness.

 

FEATURES 6.3V surge voltage Operating temperature range: -25°C to 70°C ESR range: 30Ω to 75Ω Capacitance tolerance: -20% to +80% @ 20°C

APPLICATIONS White goods and kitchen appliances Electric utility meters HVAC controls Digital radios

 

 

 

 

• AME’s AME7739 charge-pump voltage converter, page 070918
• Varta Microbattery’s PoLiFlex® range, page 070922
• austriamicrosystems’ AS1360 LDO voltage regulators, page 070923
• ON Semiconductor’s NCV2001SN2T1G operational amp, page 070928

 

www.cooperbussmann.com/3/CooperPowerStorDataSheetList.html