Patent ID: 8339107
Filing Date: 2012-12-25
Classification: H01M,H02J,Y02E

Abstract:
1. A portable device, comprising: a charge control circuit configured to control charging of a secondary battery included in a battery pack, the secondary battery being configured to supply power to the portable device; a temperature detection terminal at which a temperature of the secondary battery from a temperature detection part of the battery pack is detected; positive and negative power terminals to be connected to the battery pack; a control circuit configured to control an operation of the portable device; and an interface circuit including a peak-hold circuit and a level-shift circuit connected in parallel to the temperature detection terminal, the peak-hold circuit having an output terminal thereof connected to an input terminal of the charge control circuit and the level-shift circuit having an output terminal thereof connected to an input terminal of the control circuit, wherein a signal detected at the temperature detection terminal is directly input to each of the peak-hold circuit and the level-shift circuit of the interface circuit to be fed to each of the charge control circuit and the control circuit through the interface circuit.