ALD910028SAL

Advanced Linear Devices ALD8100/ALD9100 SAB MOSFETs

Advanced Linear Devices ALD8100/ALD9100 SAB MOSFETs are EPAD MOSFETs designed to address leakage balance of supercapacitors connected in series. ALD SAB MOSFETs have unique electrical characteristics for active continuous leakage current regulation and self-balancing of stacked seriesconnected supercaps while practically eliminating extra power dissipation. For many applications, SAB MOSFET automatic charge balancing offers a simple, economical and effective method to balance and regulate supercap voltages. With SAB MOSFETs, each supercap in a series-connected stack is continuously and automatically controlled for precision effective supercap leakage current and voltage balancing. The ALD8100/ALD9100 MOSFETs offer a superior alternative solution to other passive resistor-based or operational amplifier based balancing schemes, which typically contribute continuous power dissipation due to linear currents at all voltage levels. They are also a preferred alternative to other active supercap charging and balancing regulator ICs where tradeoffs in cost, efficiency, complexity and power dissipation are important design considerations. The SAB MOSFET provides regulation of the voltage across a supercap cell by increasing its drain current exponentially across the supercap when supercap voltages increase, and by decreasing its drain current exponentially across the supercap when supercap voltages decrease. Advanced Linear Devices ALD8100/ALD9100 SAB MOSFETs offer the user a selection of different threshold voltages for various supercap nominal voltage values and desired leakage balancing characteristics.
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ALD8100xx/ALD9100xx Quad/Dual SAB™ MOSFET Arrays

Advanced Linear Devices ALD8100xx/ALD9100xx Quad/Dual SAB™ MOSFET Arrays are built with production-proven EPAD® technology. The ALD8100xx/ALD9100xx Supercapacitor Auto Balancing (SAB) addresses voltage and leakage-current balancing of supercapacitors connected in series. Supercapacitors, also known as ultracapacitors or super caps, connected in series can be leakage-current balanced by using a combination of one or more devices connected across each supercapacitor stack to prevent over-voltages.