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ALD’s two-channel boards automatically balance 2-cell lo-voltage supercapacitor systems

Advanced Linear Devices Inc. (ALD), a design innovation leader in analog technology, today announced a two-channel supercapacitor automatic balancing (SAB) printed circuit board (PCB) that balances leakage current, manages over-voltage and dissipates zero power. Each SABMB2 balances two supercapacitors used in a series stack. The board is well suited for both prototyping or production, and it is an easy-to-use out-of-the-box solution, with no additional engineering resources required. The SABMB2 boards are used in robotics, utility boxes, critical data protection and battery backup products.

ALD’s SABMB2 two-channel board uses an ALD9100xx dual SAB MOSFET to automatically balance each individual supercapacitor cell in the stack. The board allows system designers and developers to control leakage current and balance voltage in each cell, thus preventing over-voltage damage.

Additionally, the SAB MOSFET’s PCB-balancing technology enables ultra-low power operation. The average added power dissipation from the SABMB2 is zero, providing an energy efficiency for low-loss energy applications. In many cases, this added power burn is actually negative, meaning power usage due to supercapacitor leakage is lowered when these devices are added for balancing. The MOSFETs can save supercapacitor leakage current and associated power dissipation by lowering the operating bias voltage of the leakier of the two supercapacitors.

The SABMB2 is designed to reduce time-to-market in a small package of just 0.6 inch by 1 inch for easy integration that reduces the bill-of-material costs. The board can extend the operational life of the stacked supercapacitor, balancing cells ranging from two in a series, up to dozens, and for cells that range from 0.1 Farad (F) to 3000 F in 3.3 Volt (V), 4.2 V and 5.0 V systems. The boards are designed to be used in universal applications.

For more information visit www.aldinc.com

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