ALD810022SCLI

Special Purpose Overview

The ALD810022SCLI is a quad N-channel Supercapacitor Auto Balancing (SAB™) MOSFET array manufactured by Advanced Linear Devices. It utilizes EPAD® technology to balance voltage and leakage current across up to four series-connected supercapacitors. The device features a precision factory-trimmed gate threshold voltage of 2.20V at an output current of 1µA. It operates within a commercial temperature range of 0°C to +70°C and is housed in a 16-pin SOIC package.

Special Purpose Feature Summary

• Automatically regulates and balances leakage currents across series-connected supercapacitors
• Precision factory trimmed for accurate voltage balancing
• Exponential variable resistance characteristic based on input voltage
• Near zero additional leakage currents below rated voltages

Special Purpose Applications

• Series-connected supercapacitor cell leakage balancing
• Energy harvesting systems
• Long term backup battery with supercapacitor outputs
• Zero-power voltage divider at selected voltages

Special Purpose Procurement Notes

Verify the specific suffix 'L' indicates lead-free RoHS compliance and 'I' denotes the industrial temperature range (-40°C to +85°C). Confirm the package type matches the required PCB footprint. Ensure static control procedures are used during handling due to ESD sensitivity. Cross-reference the datasheet version for any updates to electrical characteristics or pin configurations before finalizing procurement.

Special Purpose Selection Notes

Select this component when balancing up to four supercapacitors in a series stack. The 2.20V threshold voltage determines the operating point for leakage current regulation. Consider the industrial temperature rating if the application environment exceeds standard commercial limits. Verify that the maximum drain-source voltage and power dissipation ratings align with the system's electrical requirements.

Special Purpose Part Context

This part belongs to the ALD8100xx family of SAB™ MOSFET arrays, designed specifically for supercapacitor applications. It complements the dual-channel ALD910022 variant. The technology relies on production-proven EPAD® processes to achieve high precision and low leakage characteristics essential for maintaining balanced voltage distribution in energy storage stacks.

Special Purpose Replacement Considerations

Direct substitutes include other members of the ALD8100xx/ALD9100xx family, such as the ALD810019SCLI, which offers different threshold voltage characteristics. Ensure replacement parts maintain the same package type and temperature rating to fit existing designs without modification.

Special Purpose FAQ

How does the ALD810022SCLI regulate supercapacitor voltage?

It acts as an effective variable resistor connected across each supercapacitor. The output current increases exponentially as the input voltage rises above the 2.20V threshold, shunting excess charge to prevent over-voltage.

What is the significance of the 'I' suffix in the part number?

The 'I' suffix indicates that the device is qualified for the industrial temperature range of -40°C to +85°C, whereas the non-suffixed version is limited to the commercial range of 0°C to +70°C.

Can this device be used for parallel supercapacitor balancing?

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