DESCRIPTION

· The LM3420 is a lithium-ion battery charge controller designed for precise charging control.

· It supports multiple battery configurations including 1-cell (4.2V), 2-cell (8.4V), 3-cell (12.6V), and 4-cell (16.8V).

· The device integrates a high-accuracy voltage reference and a programmable charge current.

FEATURES

· High-accuracy voltage regulation (±0.75% over temperature).

· Programmable charge current up to 1A.

· Integrated thermal shutdown and overcurrent protection.

· Low quiescent current (typically 50µA).

· Available in a compact SOT-23 package.

APPLICATIONS

· Lithium-ion battery charging in portable devices.

· Backup power systems and battery packs.

· Industrial and medical equipment requiring precise battery management.