DESCRIPTION

· The ALD810018/ALD910018 are part of the ALD8100xx (quad) and ALD9100xx (dual) family of Supercapacitor Auto Balancing MOSFETs (SAB™ MOSFETs).

· These MOSFETs are designed to address voltage and leakage-current balancing of supercapacitors connected in series.

· The ALD810018 can balance up to four supercapacitors, while the ALD910018 is suitable for up to two series-connected supercapacitors.

· Each SAB MOSFET features a precision gate threshold voltage of 1.80V when VGS = VDS at IDS(ON) = 1µA.

· The output current (IOUT) varies exponentially with the input voltage (VIN), effectively acting as a variable resistor.

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.

· 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.