First secondary protection ICs for power tools and e-bikes

These ICs reduce voltage monitoring board size, provide the industry’s highest level of accuracy and contribute to improved safety

ABLIC has launched the S-82K5B/M5B Series secondary protection ICs for three to five serially connected cells. These are its first secondary protection ICs with an integrated cascade function that can decrease the number of components required for monitoring batteries with six or more serially connected cells by approximately 30% compared to conventional products.

Secondary protection ICs are employed in a wide range of applications that require high voltage, such as power tools, vacuum cleaners, and e-bikes, as well as a high degree of safety.

Secondary protection ICs are combined with fuses that blow when an external signal is received. When an overcharge occurs, a signal from the secondary protection IC causes the fuse to blow and break the charging current path to protect connected devices. Conventional secondary protection ICs could monitor batteries with up to five serially connected cells but require many external components to monitor larger numbers of serially connected cells.

The new series is a secondary protection IC for three to five serially connected cells with the following features:

A cascade function (a function which facilitates connection protection of more batteries than the maximum number of batteries that a single protection IC can protect) makes it possible to carry out voltage monitoring of rechargeable batteries with six or more serially connected cells using far fewer components than conventional products; an open detection circuit which detects communication failures between ICs to enable safer voltage monitoring; a lineup of two products to ensure that we can flexibly respond to customer needs: the S-82K5B Series with ±20mV overcharge detection voltage accuracy, and the S-82M5B with the industry’s highest accuracy of ±15mV.