ALD810017SCL

Overview

The ALD810017SCL is a quad Supercapacitor Auto Balancing (SAB™) MOSFET array manufactured by Advanced Linear Devices Inc. It integrates four N-channel MOSFETs in a 16-SOIC package to balance voltage and leakage current across series-connected supercapacitors. The device features a precision gate threshold voltage of 1.70V at an output current of 1µA, with an operating temperature range of 0°C to +70°C. It supports a maximum drain-source voltage of 10.6V and an operating current up to 80mA.

Feature Summary

• Integrates four precision-matched SAB MOSFETs for automatic voltage and leakage-current balancing
• Utilizes production-proven EPAD® technology for high reliability
• Provides exponential variable resistance characteristics based on input voltage
• Factory trimmed for precise gate threshold voltage matching

Applications

• Series-connected supercapacitor cell leakage balancing
• Energy harvesting systems
• Long-term backup battery configurations with supercapacitor outputs
• Zero-power voltage dividers at selected voltages
• Scaled supercapacitor stacks and arrays

Procurement Notes

Verify the specific suffix 'SCL' confirms the commercial temperature range (0°C to +70°C) and lead-free RoHS compliance. Ensure the application environment does not exceed the absolute maximum ratings, specifically the 15.0V supply voltage limit and 10.6V drain-source breakdown voltage. Confirm that the 16-pin SOIC footprint matches the PCB design requirements.

Selection Notes

Select this component when balancing up to four supercapacitors in series using a single integrated circuit. The 1.70V threshold voltage defines the primary balancing point; ensure the target supercapacitor voltage aligns with this characteristic. Consider the industrial variant (ALD810017SCLI) if operation below 0°C or above 70°C is required. Verify that the maximum expected leakage currents fall within the device's active current capabilities.

Part Context

This part belongs to the ALD8100xx family of SAB™ MOSFET arrays, designed specifically for managing series-connected energy storage elements. It complements the dual-channel ALD910017 variant. The device addresses over-voltage risks in supercapacitor stacks by automatically shunting excess charge through its voltage-dependent resistance.

Replacement Considerations

The ALD810017SCLI serves as the direct industrial temperature range replacement for the commercial grade SCL version.

FAQ

How does the ALD810017SCL regulate supercapacitor voltage?

It acts as a voltage-dependent variable resistor. As the voltage across a supercapacitor increases, the device's effective resistance decreases exponentially, shunting more current to prevent over-voltage.

What is the significance of the 1.70V gate threshold voltage?

At 1.70V input, the device conducts exactly 1µA. This value sets the baseline for the balancing operation; deviations from this voltage result in tenfold changes in output current.

Can this device be used for parallel supercapacitor balancing?

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