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New Miniature Logic Fuses for Li-ion Batteries

The new SEFUSE D6SC logic fuse from ATC Semitec, are ultra-thin surface mount fuses which are ideal for portable products which require space saving overcharge and over-current protection of their Li-ion batteries

Under normal Li-ion battery operating conditions, the D6SC carries the full current load.  If an over-current condition occurs, then the fuse simply blows due to the excessive current.  If there is an overcharge condition, then the D6SC’s built-in heater is triggered by the FET linked to the battery’s secondary protection IC.  This heater blows the D6SC fuse circuit and thus protects the Li-ion battery.

With an ultra-thin land area of <1mm thin, 3 x 4mm, they are ideal for protecting smartphones, tablets, notebooks and cordless power tool batteries.  As well as the D6SC, the D6SA & D6SE series (capable of handling up to 60A and higher) are being developed for e-bike and e-vehicle applications .

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