Patent Number: 6,670,790

Title: Power switch for battery protection

Abstract: A new battery charging, discharging, and protection circuit is achieved. The circuit comprises, first, a FET switch having gate, source, drain, and bulk. The FET switch may comprise either a NMOS device or a PMOS device. The source is coupled to a load terminal, and the drain is coupled to a battery terminal. Second, a means of controlling the FET switch gate and the bulk is included. The FET switch gate voltage determines the OFF and ON state of said FET switch. The bulk is switchably coupled between the battery terminal and the load terminal. A cascaded version is disclosed.

Inventors: Stellberger; Achim (Kronau, DE)

Assignee: Dialog Semiconductor GmbH

International Classification: H02J 7/00 (20060101); H02J 007/00 ()

Expiration Date: 12/30/2020