ALD910018SALI

Special Purpose Overview

The ALD910018SALI is a dual N-channel Supercapacitor Auto Balancing (SAB) MOSFET array manufactured by Advanced Linear Devices. It utilizes EPAD technology to balance voltage and leakage current in series-connected supercapacitors, preventing over-voltages. The device features a precision gate threshold voltage of 1.80V at an output current of 1µA. Its effective resistance varies exponentially with the input voltage, allowing automatic regulation. Key electrical parameters include a Drain-Source Breakdown Voltage of 10.6V, a maximum operating current of 80mA, and a power dissipation rating of 500mW. It operates within a temperature range of -40°C to +85°C.

Special Purpose Feature Summary

• Automatically regulates and balances leakage currents across series-connected supercapacitors
• Features precision factory-trimmed gate threshold voltage for accurate balancing
• Provides near-zero additional leakage currents when connected across supercapacitors
• Offers exponential variation of effective variable resistance based on input voltage

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 specific suffix 'I' indicates the industrial temperature range (-40°C to +85°C), while 'L' denotes lead-free compliance. Confirm package type matches the required SOIC-8 footprint. Ensure static control procedures are used during handling due to ESD sensitivity. Cross-reference the exact part number with manufacturer documentation to confirm availability and specifications.

Special Purpose Selection Notes

Select this component for applications requiring precise balancing of up to two series-connected supercapacitors. The dual configuration allows independent balancing for each cell. Consider the 10.6V breakdown voltage limit when designing stacks. The exponential current response ensures minimal power dissipation at lower voltages. Verify that the operating environment falls within the specified industrial temperature range.

Special Purpose Part Context

This device belongs to the ALD9100xx family of SAB MOSFETs, designed specifically for supercapacitor balancing. It complements the quad-channel ALD8100xx series. Both families utilize production-proven EPAD technology. The ALD910018 provides a dual-channel solution suitable for smaller supercapacitor stacks compared to the four-channel alternative.

Special Purpose Replacement Considerations

ALD910018SAL is the commercial temperature variant of the same functional device.