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Cell balancing IC enables compact, longer-lasting EDLCs

Posted: 02 Feb 2015 ?? ?Print Version ?Bookmark and Share

Keywords:ROHM Semiconductor? cell balancing IC? supercap? automotive? industrial equipment?

ROHM Semiconductor has recently announced the development of a cell balancing IC that promises to deliver increased miniaturisation, greater stability and longer life for supercaps, or electric double layer capacitors (EDLCs), which are pushing the uptake of energy regeneration applications in industrial equipment, automotive start-stop systems, and voltage sag (instantaneous voltage drop) countermeasures.

The BD14000EFV-C integrates more than 20 discrete components required for supercap cell balancing on a single chip, reducing mounting area by 38 per cent over conventional solutions while eliminating component variations, making it easy to configure compact, high reliability supercap systems, stated the company.


In addition to cell balancing functionality for up to six cells, multiple ICs can be connected in series to enable simultaneous control of even more cells. The cell balancing voltage can be set between 2.4V and 3.1V, ensuring support for a variety of supercaps. Flag output is also built-in, along with an overcurrent detection voltage function with adjustable detection voltage setting based on the cell balancing voltage. In addition, AEC-Q100 qualification ensures worry-free use in automotive and other environments requiring high reliability.

Applications of the cell balancing IC include energy regeneration: automotive, industrial equipment, construction machinery and other systems that reutilise kinetic energy; power supply stabilisation/voltage sag countermeasures: emergency backup (i.e. UPS); startup power auxiliary: automotive start-stop systems, rapid OA equipment startup; and lead-acid battery replacement: no lead minimises environmental impact and provides longer life.

Pricing for 4,000pcs of the BD14000EFV-C is at $0.72. The BD14000EFV-EVK-001 evaluation board can be had for $122. Samples are available. Delivery is 14 weeks ARO.

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