MOSFETs automatically balance supercaps in industrial apps

A family of supercapacitor auto balancing (SAB) MOSFETs suit industrial applications to regulate and balance leakage currents while minimizing energy used for balancing supercapacitor cells stacked in series stack of two or more. The devices target industrial-grade energy storage applications that require an operating temperature range between –40° to 85°C. They suit a range of applications such as remote monitoring applications, automotive systems, backup power, transportation, automation, or any application that operates in exposure to the elements and needs to endure extreme climate conditions.

The new device family covers a wide range of operating voltages from 1.6V to 2.7 V and leakage current ranges from 3000 μA. In outdoor industrial energy storage, leakage current of supercapacitors used in a stack is balanced by connecting one or more SAB MOSFETs across each cell. Each device in the industrial SAB MOSFET ALD8100xxx/ALD9100xxx family contains 26 different products and each product can balance supercapacitors up to 4 cells in a single IC package. The devices can balance an unlimited number of supercapacitor cells stacked in a series. They are available in both quad and dual packages.