ALD910030SALI

Special Purpose Overview

The ALD910030SALI is a dual-channel Supercapacitor Auto Balancing (SAB™) MOSFET array manufactured by Advanced Linear Devices, Inc. utilizing EPAD® technology. It provides precision voltage and current characteristics for balancing up to two series-connected supercapacitors. The device features a factory-trimmed gate threshold voltage of 3.00V at an output current of 1µA. Its effective resistance varies exponentially with input voltage, automatically regulating leakage currents to prevent overvoltages across the capacitor stack.

Special Purpose Feature Summary

• Automatically regulates and balances leakage currents in series-connected supercapacitors
• Precision factory trimmed gate threshold voltage ensures accurate balancing
• Exponential variable resistance characteristic minimizes additional leakage currents
• Always active operation with fast response time

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 ordering suffix 'L' indicates lead-free compliance per RoHS standards. Confirm the 'I' suffix corresponds to the industrial operating temperature range of -40°C to +85°C. Ensure the SALI package designation matches the required 8-pin SOIC footprint for your design constraints.

Special Purpose Selection Notes

Select this component when balancing exactly two series-connected supercapacitors. The ALD910030 offers a dual-channel configuration suitable for lower cell counts compared to the quad-channel ALD810030. Verify that the maximum drain-source voltage rating of 10.6V accommodates the individual supercapacitor voltage limits within the intended application stack.

Special Purpose Part Context

This part belongs to the ALD9100xx family of SAB™ MOSFETs designed for automatic supercapacitor balancing. It utilizes production-proven EPAD® technology to address voltage and leakage-current issues in series stacks. The device integrates precision analog control directly into the MOSFET structure, eliminating the need for external discrete balancing circuits.

Special Purpose Replacement Considerations

The ALD810030SALI serves as a functional substitute for applications requiring four-cell balancing instead of two. Both devices share identical core SAB™ technology and electrical characteristics but differ in channel count and package pinout.

Special Purpose FAQ

How does the ALD910030SALI balance supercapacitors?

It acts as an effective variable resistor connected across each supercapacitor. The resistance decreases exponentially as the voltage across the capacitor increases, shunting excess charge to maintain voltage equilibrium.

What is the significance of the 3.00V gate threshold voltage?

At 3.00V input, the device conducts 1µA. This precise point allows designers to set the maximum operating voltage limit for the supercapacitors, ensuring they do not exceed safe levels during charging.

Does the device consume significant power when balancing low-voltage cells?

No. When the input voltage drops below approximately 2.80V, the output current decreases significantly (to 0.01µA or less), resulting in essentially zero power dissipation.