Autobalancing MOSFET for 3V supercapacitors
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Advanced Linear Devices has Inc. (ALD) has developed a dual MOSFET for power management of 3V supercapacitors.
The ALD910030 dual MOSFET enables precise voltage and leakage current balancing, extending the reach to higher-voltage supercapacitors.
The Supercapacitor Auto-Balancing (SAB) MOSFET uses virtually no power for cell balancing and prevents most catastrophic failures. It exponentially adjusts drain currents to effectively balance voltages, safeguarding against voltage runaway power fluctuations.
The device is aimed at utility boxes, backup power systems, industrial applications, uninterruptable power supplies, renewable energy and consumer electronics.
Traditionally, widely used supercapacitors had a voltage rating of 2.7V to 3.0V. However, 3.3V supercapacitors are increasing the demand for advanced voltage and leakage current balancing schemes. The SAB MOSFET balances series-connected supercapacitors by dissipating near-zero leakage currents to significantly reduce power usage.
The MOSFET operates within a temperature range from -40°C to +85°C and is precision factory-trimmed according to individual voltage specifications.
Supercapacitors are commonly connected in series to reach targeted voltage levels. For instance, four 3.3V-rated supercaps can be stacked for applications that need a standard 12V direct current supply voltage. This configuration will produce 13.2V, satisfying the requirements of a 12V power supply while allowing for potential fluctuations.
“We are proud to add a product to our SAB MOSFET family that provides power management for 3V rated or higher supercapacitors while consuming near-zero power,” said Robert Chao, president and founder of ALD. “This breakthrough chip exemplifies ALD’s commitment to technological leadership and innovation.”
The ALD910030SALI is packaged in an 8-pin SOIC and is available through Digi-Key and Mouser, starting at $4.43 per unit for quantities of 50.
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