ALD810025SCLI

Special Purpose Overview

The ALD810025SCLI is a quad Supercapacitor Auto Balancing (SAB) MOSFET array manufactured by Advanced Linear Devices. It operates within an industrial temperature range of -40°C to +85°C and utilizes a 16-pin SOIC package. The device features a precision gate threshold voltage of 2.50V at 1µA drain-source current, with an offset voltage typically at 0mV. Maximum ratings include a V+ to V- voltage of 15.0V and a Drain-Source breakdown voltage of 10.6V. Output currents scale exponentially from 0.0001µA to 10000µA as input voltage increases from 2.10V to 3.92V.

Special Purpose Feature Summary

• Automatically regulates and balances leakage currents across series-connected supercapacitors
• Precision factory trimmed gate threshold voltage for accurate balancing
• Exponential output current response to input voltage changes
• Near zero additional leakage currents below rated voltages

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 SCLI suffix confirms the industrial temperature range (-40°C to +85°C) rather than commercial grade. Confirm the 16-pin SOIC package matches the design footprint. Ensure ESD handling procedures are followed during assembly due to device sensitivity. Cross-reference the datasheet version to confirm operating electrical characteristics remain consistent.

Special Purpose Selection Notes

Select this component when balancing up to four supercapacitors in series is required. The quad configuration allows managing multiple cells within a single IC package. Verify that the maximum supercapacitor voltage does not exceed the 10.6V Drain-Source breakdown rating. Consider the exponential current-voltage relationship to ensure appropriate balancing currents for the specific capacitor leakage characteristics.

Special Purpose Part Context

This part belongs to the ALD8100xx family of SAB MOSFET arrays designed for supercapacitor balancing. It shares core technology with the dual-channel ALD910025 but provides four independent balancing channels. The device addresses voltage and leakage-current balancing issues inherent in series-connected supercapacitor stacks.

Special Purpose Replacement Considerations

ALD810025SCL (Commercial Temperature Range)

Special Purpose FAQ

How does the device handle supercapacitor voltage imbalance?

It acts as a variable resistor connected across each supercapacitor. As voltage rises, the effective resistance decreases exponentially, shunting excess current to balance the stack.

What is the significance of the 2.50V gate threshold voltage?

At 2.50V input, the device conducts exactly 1µA. This serves as the reference point for the exponential scaling of output current relative to the supercapacitor voltage.

Can this device be used for parallel supercapacitor balancing?

Yes, the documentation states it can balance series and/or parallel-connected supercaps.