ALD910026SAL

Special Purpose Overview

The ALD910026SAL is a dual Supercapacitor Auto Balancing (SAB) MOSFET array manufactured by Advanced Linear Devices Inc. It operates within an 8-pin SOIC package and supports a supply voltage range up to 15.0V, with absolute maximum ratings of 10.6V for drain-source and gate-source voltages. The device features a typical gate threshold voltage of 2.60V at 1µA current. It provides precise leakage-current balancing for two series-connected supercapacitors, with output currents ranging from 0.0001µA to 10000µA depending on the input voltage.

Special Purpose Feature Summary

• Precision factory-trimmed gate threshold voltage ensures accurate balancing across series-connected supercapacitors.
• Exponential relationship between input voltage and output current allows effective regulation of cell voltages without excessive power dissipation.
• Built with production-proven eEPAD technology for reliable performance in balancing applications.
• Near-zero additional leakage currents when connected across supercapacitors, minimizing impact on stack efficiency.

Special Purpose Applications

• Series-connected supercapacitor cell leakage balancing
• Energy harvesting systems requiring voltage stabilization
• Long-term backup battery configurations with supercapacitor outputs

Special Purpose Procurement Notes

Verify the specific ordering suffix 'L' indicates lead-free compliance per RoHS standards. Confirm the operating temperature range matches the application requirements, as the SAL variant covers commercial temperatures (0°C to +70°C). Ensure static control procedures are followed during handling due to ESD sensitivity. Cross-reference the datasheet version and revision date to ensure compatibility with design specifications.

Special Purpose Selection Notes

Select the ALD910026SAL for applications requiring automatic balancing of exactly two series-connected supercapacitors. Consider the ALD810026 family members if balancing three or four cells is necessary. Evaluate the required output current range against the exponential characteristic curve to ensure adequate balancing capability. Verify that the 15.0V supply voltage rating aligns with the system's maximum operating conditions.

Special Purpose Part Context

The ALD910026SAL belongs to the SAB MOSFET family designed specifically for managing voltage distribution in series-connected supercapacitor stacks. This dual-channel configuration complements the quad-channel ALD810026 variants. The device utilizes unique precision characteristics to automatically adjust leakage currents based on individual cell voltages, preventing over-voltage conditions without external control circuitry.

Special Purpose Replacement Considerations

The ALD910026SALI serves as the industrial temperature grade replacement for the commercial SAL variant. For applications requiring more than two channels, the ALD810026 family members provide quad-channel solutions. Verify pinout and electrical characteristics match before substituting with other SAB MOSFET devices.

Special Purpose FAQ

How does the ALD910026SAL balance supercapacitor voltages?

It uses a precision gate threshold voltage to create an effective variable resistor. As the voltage across a supercapacitor increases, the output current increases exponentially, shunting excess charge and balancing the voltage across the series stack.

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

The 2.60V threshold is the typical voltage at which the device conducts 1µA. It serves as a reference point for setting the maximum desired operating voltage of the supercapacitor cells in the balancing circuit.

Can this device be used for parallel-connected supercapacitors?

Yes, the documentation states it can balance series and/or parallel-connected supercapacitors, though its primary design focus is on leakage-current balancing in series stacks.