Suitable for EDLC cell balancing and overcharge protection
Applications include EDLC modules and rechargeable battery modules

SII Semiconductor Corporation, a semiconductor manufacturing subsidiary of Seiko Instruments Inc., announced the launch of the S-19190 series, an automotive electric double-layer capacitor (EDLC) integrated circuit (IC) with cell-balancing and overcharge protection functions. Typical applications for this series include EDLC modules and rechargeable battery modules.

The S-19190 series protects EDLC cells by detecting overcharge conditions in individual cells and evenly adjusting the cell voltage levels. While conventional EDLC protection ICs can only control a fixed number of cells, the S-19190 series is the industry's first product capable of flexibly protecting any number of cells required for the design. This flexible design approach enables the optimization of circuit configurations for various applications.

As the automotive industry expands the supply of electric vehicles (EVs) and fuel cell vehicles (FCVs), the adoption of EDLCs is surging. EDLCs not only improve design efficiency but also provide functions that enable flexible design by meeting the requirements of high-current designs, such as restarting the engine when idling, storing renewable energy during braking (by converting kinetic energy into stored electrical energy during deceleration), and managing sudden or immediate drops in system voltage. Each EDLC cell must be balanced to prevent performance degradation when multiple EDLCs are connected to increase voltage. The S-19190 series is small in size with an SOT-23-6 package (2.8 x 2.9 x 1.3 mm) and can control multiple EDLCs.

The S-19190 series is suitable for use in the growing automotive environment because it incorporates rigorous automotive manufacturing processes optimized by SII Semiconductor Corporation through years of experience. The cell balancing voltage can be selected in 5 mV increments from 2.0 V to 4.6 V, and the overcurrent detection voltage can be selected in 5 mV increments from 2.0 V to 4.6 V; the current consumes up to 2.0 μA at a temperature of +25°C. Additionally, AEC-Q100 certification is currently being pursued, and PPAP (Production Part Approval Process) documents are available upon request.