NJW4120 Datasheet | New Japan Radio

.. Lithium-ion Battery Charger Controller IC with Timer - GENERAL DESCRIPTION - PACKAGE OUTLINE NJW4120 is a 1-cell and 2-cell lithium ion battery charge control IC with a built-in AC-DC secondary side control feature. Using a photocoupler to directly feed back optimum charging voltage and current information to the primary side, it increases energy efficiency, makes possible a smaller charger, and conserves energy. Charging current can be freely set and therefore it is NJW4120M possible to optimize charging according to battery capacity. As safety Features it has over voltage, over discharge, temperature detection, and a charge over timer. Also, the adaptor and the...