Battery charging controller and portable electronic device
AssigneeRohm Co., Ltd.
InventorsTetsuro Hashimoto, Isao Yamamoto, Yoshikazu Sasaki
Life of this patent
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Abstract
A battery charging controller according to the present invention controls battery charging in response to a charging-control signal sent from a CPU, and includes an starting controller which is started upon a detection of an insertion of an AC adapter, and which then starts a regulator at a predetermined timing by using a regulator control signal. The regulator is started upon a detection of the regulator control signal, and thereafter starts the CPU by using an starting signal. The CPU is started upon a detection of the starting signal.
Claims12
A battery charging controller configured to control a charging of a battery, the battery charging controller comprising:
- a charging circuit configured to detect an insertion for an alternating current adapter, and then to output an adapter detection signal;
- an ON cause detector configured to receive the adapter detection signal, and then to output an ON cause detection signal indicating that the alternating current adapter is inserted;
- an oscillator configured to be started by a detection of the ON cause detection signal, and then to send a timing signal;
- a starting controller configured to be started by the adapter detection signal, and then to send a regulator control signal for starting a regulator in accordance with the adapter detection signal and the timing signal, and to output a reset signal after a predetermined time elapses from a point in time at which the regulator control signal is sent;
- and
- a central processing unit configured to be started by a signal outputted from the regulator, and then to generate a charging-control signal for the battery charging in accordance with the adapter detection signal and the timing signal, and then to output the charging-control signal to the charging circuit.
Dependencies are inferred from the claim text.