ALD810021SCL

Special Purpose Overview

The ALD810021SCL is a quad Supercapacitor Auto Balancing (SAB) MOSFET array manufactured by Advanced Linear Devices. It utilizes EPAD technology to balance up to four series-connected supercapacitors. The device features a precision gate threshold voltage of 2.10V at 1µA drain-source current, with an exponential output current characteristic relative to input voltage. 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 and current characteristics
• Exponential variable resistance behavior based on cell voltage levels
• 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 with supercapacitor outputs
• Zero-power voltage divider at selected voltages

Special Purpose Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm the operating temperature range and lead-free status. Confirm that the component matches the exact part number required for the intended application environment. Ensure compliance with relevant RoHS standards if applicable to the project specifications.

Special Purpose Selection Notes

Select this component for applications requiring automatic balancing of multiple series-connected supercapacitors without external control circuitry. Consider the quad configuration for stacks of up to four cells. Evaluate the exponential current response against the maximum allowable leakage current limits of the specific supercapacitors used in the design.

Special Purpose Part Context

This component belongs to the ALD8100xx family of SAB MOSFET arrays designed for supercapacitor balancing. It shares core technology with the dual-channel ALD910021 variant but provides four independent balancing channels in a single package. The device addresses voltage and leakage-current balancing challenges in high-voltage supercapacitor stacks.

Special Purpose Replacement Considerations

ALD810021SCLI serves as the industrial temperature rated (-40°C to +85°C) alternative to the commercial grade ALD810021SCL. Verify pinout compatibility and electrical characteristics before substituting components from different manufacturers or families.

Special Purpose FAQ

How does the ALD810021SCL regulate supercapacitor voltage?

It acts as a voltage-dependent resistor where the output current increases exponentially as the input voltage rises above the 2.10V threshold, shunting excess charge to prevent over-voltage.

What is the typical gate threshold voltage for this device?

The typical gate threshold voltage is 2.10V when measured at a drain-source current of 1µA with gate-drain source terminals connected together.

Can this device be used for parallel supercapacitor configurations?

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