ALD810018SCL

Overview

The ALD810018SCL is a quad Supercapacitor Auto Balancing (SAB) MOSFET array manufactured by Advanced Linear Devices, Inc. It integrates four N-channel enhancement-mode MOSFETs in a 16-pin SOIC package to balance voltage and leakage current across series-connected supercapacitors. The device operates with a Drain-Source Breakdown Voltage of 10.6V and an Operating Current limit of 80mA. It features a precision factory-trimmed gate threshold voltage of 1.80V at 1µA drain-source current. The output current varies exponentially from 0.0001µA to 10000µA based on the input voltage applied across each supercapacitor.

Feature Summary

• Integrates four SAB MOSFET devices for balancing up to four series-connected supercapacitors
• Utilizes production-proven ePAD technology for precise voltage and leakage-current regulation
• Features exponential variable resistance characteristics that automatically adjust to cell voltages
• Provides near-zero additional leakage currents when connected across supercapacitor stacks

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 ordering suffix 'L' indicates lead-free compliance per RoHS standards. Confirm the operating temperature range matches the application requirements; the SCL suffix denotes the commercial range of 0°C to +70°C. Ensure the design accommodates the 16-pin SOIC physical dimensions and electrical limits before procurement.

Selection Notes

Select this component when balancing four supercapacitors in a series configuration. Verify that the maximum supercapacitor leakage current does not exceed the device's 80mA operating current limit. Ensure the input voltage margin accounts for tolerances and temperature effects within the intended operating environment.

Part Context

This part belongs to the ALD8100xx family of SAB MOSFET arrays designed for addressing voltage and leakage-current balancing of supercapacitors connected in series. It is distinct from the dual-channel ALD9100xx variants and utilizes unique precision operating characteristics for each of its four internal devices.

Replacement Considerations

The ALD810018SCLI serves as the industrial temperature grade replacement for the same functional specifications. No other direct substitutes are documented in the provided datasheet.

FAQ

How does the ALD810018SCL regulate supercapacitor voltage?

It acts as an effective variable resistor where the output current increases exponentially with the input voltage, automatically shunting excess charge to prevent over-voltages.

What is the precision gate threshold voltage for this device?

The typical gate threshold voltage is 1.80V when the gate-drain source terminals are connected together at a drain-source current of 1µA.

Can this device be used for parallel-connected supercapacitors?

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