ALD810020SCLI

Special Purpose Overview

The ALD810020SCLI is a quad N-channel Supercapacitor Auto Balancing (SAB™) MOSFET array manufactured by Advanced Linear Devices, Inc. It utilizes EPAD® technology to balance voltage and leakage current in series-connected supercapacitors. The device features four precision-trimmed channels with a typical gate threshold voltage of 2.00V at an output current of 1µA. It operates within a temperature range of -40°C to +85°C and is housed in a 16-pin SOIC package.

Special Purpose Feature Summary

• Automatically regulates and balances leakage currents across multiple series-connected supercapacitors
• Precision factory trimmed for accurate voltage balancing without external components
• Exponential current response to input voltage changes for effective charge balancing
• Near-zero additional leakage currents when connected across supercapacitors

Special Purpose Applications

• Series-connected supercapacitor cell leakage balancing
• Energy harvesting systems
• Long-term backup battery applications with supercapacitor outputs
• Zero-power voltage dividers at selected voltages
• Scaled supercapacitor stacks and arrays

Special Purpose Procurement Notes

Verify the specific suffix 'L' indicates lead-free compliance and RoHS adherence. Confirm the 'I' suffix corresponds to the industrial temperature range (-40°C to +85°C). Ensure the 16-pin SOIC package matches the design requirements. Cross-reference the datasheet version to confirm operating electrical characteristics.

Special Purpose Selection Notes

Select this component for applications requiring automatic balancing of up to four series-connected supercapacitors. The device eliminates the need for complex external circuitry. Consider the exponential current-voltage relationship for precise control. Verify that the maximum drain-source voltage and power dissipation ratings meet the system's operational limits.

Special Purpose Part Context

This part belongs to the ALD8100xx family of SAB™ MOSFETs, designed specifically for supercapacitor balancing. It shares architectural similarities with the dual-channel ALD9100xx series but offers four independent balancing channels. The technology relies on production-proven EPAD® processes to achieve high precision and low leakage.

Special Purpose Replacement Considerations

Direct substitutes include other members of the ALD8100xx family, such as the ALD810019SCLI or ALD810022SCLI, which offer different threshold voltages. Ensure the replacement maintains the same channel count and package type while matching the required balancing voltage specifications.

Special Purpose FAQ

How does the ALD810020SCLI handle voltage imbalance?

It automatically adjusts its internal resistance based on the voltage across each supercapacitor, shunting excess current from higher-voltage cells to balance the stack.

What is the significance of the 2.00V threshold voltage?

At 2.00V input, the device conducts 1µA. This serves as a reference point; deviations above or below this voltage exponentially increase or decrease the output current, respectively.

Can this device be used for parallel supercapacitor balancing?

Yes, the datasheet indicates it can balance series and/or parallel-connected supercapacitors.