CHARGING APPARATUS

CHARGING APPARATUS

There is provided a charging apparatus that, even when an AC adapter is connected and there is heavy load, makes it possible to reduce heat produced due to the power loss of a control transistor, reduce cost and area for implementation, and improve safety. Charging apparatus 100 has: P-channel MOS t...

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Hauptverfasser: WATABE RYOU, ARAI SHIGENORI, TAKADA KAZUHISA, YOSHIDA MASATO
Format: Patent
Sprache:eng
Schlagworte:
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
SYSTEMS FOR STORING ELECTRIC ENERGY
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creator WATABE RYOU
ARAI SHIGENORI
TAKADA KAZUHISA
YOSHIDA MASATO
description There is provided a charging apparatus that, even when an AC adapter is connected and there is heavy load, makes it possible to reduce heat produced due to the power loss of a control transistor, reduce cost and area for implementation, and improve safety. Charging apparatus 100 has: P-channel MOS transistors M 1 and M 2 that control charging current; current detecting resistance Rs that is connected to current output terminals of P-channel MOS transistors M 1 and M 2 and detects the charging current; switch 130 that is arranged on a path that bypasses current detecting resistance Rs; and load 300 that receives power supply from battery 200 without involving current detecting resistance Rs when switch 130 is closed. Current difference amplifier 120 amplifies the detected voltage of current detecting resistance Rs, comparator 160 compares the output voltage of current difference amplifier 129 with the reference voltage, and thereby, when current flowing into battery 200 is equal to or less than a predetermined value, switch 130 is closed and current detecting resistance Rs is short-circuited.
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subjects CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
SYSTEMS FOR STORING ELECTRIC ENERGY
title CHARGING APPARATUS
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