DESCRIPTION

· The ALD810021/ALD910021 are part of the ALD8100xx (quad) and ALD9100xx (dual) family of Supercapacitor Auto Balancing MOSFETs (SAB™ MOSFETs).

· Designed to address voltage and leakage-current balancing in series-connected supercapacitors.

· Utilizes EPAD® technology for precise voltage and current characteristics.

· ALD810021 balances up to four supercapacitors, while ALD910021 balances up to two.

· Features a precision gate threshold voltage of 2.10V in Vt mode.

· Output current (IOUT) varies exponentially with input voltage (VIN).

FEATURES

· Simple and economical to use.

· Precision factory-trimmed for accurate performance.

· Automatically regulates and balances leakage currents.

· Effective for supercapacitor charge-balancing.

· Balances up to 4 supercapacitors with a single IC package.

· Scalable to larger supercapacitor stacks and arrays.

· Near zero additional leakage currents.

· Zero leakage at 0.3V below rated voltages.

· Balances series and/or parallel-connected supercapacitors.

· Leakage currents are an exponential function of cell voltages.

· Active current ranges from <0.3nA to >1000 µA.

· Always active with fast response time.

· Minimizes leakage currents and power dissipation.

APPLICATIONS

· Series-connected supercapacitor cell leakage balancing.

· Energy harvesting systems.

· Long-term backup battery systems with supercapacitor outputs.

· Zero-power voltage divider at selected voltages.

· Matched current mirrors and current sources.

· Zero-power mode maximum voltage limiter.

· Scaled supercapacitor stacks and arrays.