ONE CHIP STRUCTURE OF BATTERY PROTECTION CIRCUITS

摘要

PURPOSE: An integrated chip structure of a battery protection circuit is provided to reduce an entire size by arranging a partial resistance and a capacitor in inside. CONSTITUTION: A dual FET(Field Effect Transistor) chip(110) comprises a first FET and a second FET of a common drain structure. A protection IC(Integrated Circuit)(120) senses an over discharge state in the discharge of a battery and stops a discharge motion of the battery by controlling the first FET in the over discharge. The protection IC is laminated on a part of the upper side of the dual FET ship. Capacitors(C1, C2, C3) are formed into a structure interlinking source and drain electrodes. The capacitors are laminated on the upper side of the dual FET chip.