ALD810026SCLI

Special Purpose Overview

The ALD810026SCLI is a quad Supercapacitor Auto Balancing (SAB) MOSFET array manufactured by Advanced Linear Devices. It operates within an industrial temperature range of -40°C to +85°C and utilizes a 16-pin SOIC package with lead-free construction. The device provides four independent channels for balancing series-connected supercapacitors, featuring a precision gate threshold voltage of 2.60V at 1µA drain-source current. It supports a maximum supply voltage of 15.0V and includes specific electrical characteristics such as a breakdown voltage of 10.6V and turn-on/turn-off delay times of 10ns.

Special Purpose Feature Summary

• Automatically regulates and balances leakage currents across multiple series-connected supercapacitors
• Precision factory trimmed gate threshold voltage ensures accurate voltage limiting
• Exponential output current response effectively controls excessive voltage rise
• Near zero additional leakage currents when connected 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 SCLI suffix confirms the industrial temperature rating (-40°C to +85°C) and lead-free RoHS compliance. Ensure the 16-pin SOIC package matches the PCB footprint requirements. Confirm that the application environment does not exceed the absolute maximum ratings of 15.0V supply or 10.6V drain-source voltage. Check datasheet specifications for offset voltage tolerances if precise channel matching is required.

Special Purpose Selection Notes

Select this component for applications requiring automatic balancing of up to four supercapacitors in series. The quad configuration allows a single IC to manage multiple cells, reducing board space compared to discrete solutions. Consider the exponential current-voltage characteristic for effective overvoltage protection without external control circuitry. Verify that the operating voltage margin accommodates temperature effects and component tolerances.

Special Purpose Part Context

This part belongs to the ALD8100xx family of SAB MOSFET arrays designed for supercapacitor voltage balancing. It complements the dual-channel ALD910026 variant. Both utilize production-proven EPAD technology to address leakage-current balancing issues inherent in series-connected ultracapacitor stacks. The family offers scalable solutions for larger supercapacitor arrays.

Special Purpose Replacement Considerations

ALD810026SCL is the commercial temperature version of this component.

Special Purpose FAQ

How does the ALD810026SCLI balance supercapacitor voltages?

It acts as a variable resistor connected across each supercapacitor. As the voltage across a capacitor rises above the threshold, the device's on-resistance decreases exponentially, shunting excess current to prevent overvoltage.

What is the significance of the 2.60V gate threshold voltage?

At 2.60V input, the device conducts 1µA. This precise point serves as the reference for balancing; voltages significantly above or below this value cause the output current to increase or decrease by orders of magnitude.

Can this device be used for parallel supercapacitor balancing?

Yes, the documentation states it can balance series and/or parallel-connected supercapacitors.