ALD910016SALI

Special Purpose Overview

The ALD910016SALI is a dual 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, preventing over-voltages. The device features two independent SAB MOSFETs with precision factory-trimmed gate threshold voltages of 1.60V at 1µA drain-source current. It operates within an extended temperature range of -40°C to +85°C and is housed in an 8-pin SOIC package.

Special Purpose Feature Summary

• Precision factory trimming ensures accurate gate threshold voltage for reliable balancing
• Exponential output current response provides effective variable resistance control
• Near-zero additional leakage currents minimize power dissipation
• Always active operation with fast response time

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 ordering suffix 'I' confirms the industrial temperature range (-40°C to +85°C). Confirm the 'L' suffix indicates lead-free (RoHS) compliance. Ensure the 8-pin SOIC package matches the design requirements. Cross-reference the datasheet version for any updates to electrical characteristics or pin configurations before finalizing procurement.

Special Purpose Selection Notes

Select this component for applications requiring automatic balancing of up to two series-connected supercapacitors. The device is suitable where precise voltage regulation and minimal leakage are critical. Consider the exponential current characteristic for efficient charge balancing. Verify that the operating voltage margin accommodates tolerance and temperature effects for the specific supercapacitor stack.

Special Purpose Part Context

This part belongs to the ALD9100xx family of SAB™ MOSFET arrays, designed specifically for supercapacitor management. It complements the quad-channel ALD810016 variant. The technology addresses the inherent leakage current variations in series-connected ultracapacitors, ensuring balanced voltage distribution without external control circuitry.

Special Purpose Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.

Special Purpose FAQ

How does the ALD910016SALI achieve supercapacitor balancing?

It acts as a voltage-dependent resistor connected across each supercapacitor. As the voltage across a capacitor rises, the device's on-resistance decreases exponentially, drawing more current to balance it against others in the series stack.

What is the significance of the 1.60V gate threshold voltage?

The 1.60V threshold is the typical voltage at which the device conducts 1µA when VGS equals VDS. This precise value allows designers to set the maximum operating voltage for the supercapacitors being balanced.

Does the device consume significant power when balancing low-voltage cells?

No. When the input voltage is below approximately 1.40V, the output current drops significantly (e.g., to 0.01µA), resulting in essentially zero power dissipation.