CHARGING CIRCUIT

PURPOSE:To surely provide a trickle charging current at a current level much lower than a charging current. CONSTITUTION:A charging current is regulated by controlling a duty ratio of on/off oscillation at a transistor Q1 in a PWM oscillation circuit 1 on the basis of a reference voltage entered in...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	ISAKA ATSUSHI
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:	PURPOSE:To surely provide a trickle charging current at a current level much lower than a charging current. CONSTITUTION:A charging current is regulated by controlling a duty ratio of on/off oscillation at a transistor Q1 in a PWM oscillation circuit 1 on the basis of a reference voltage entered in an input terminal P7 of a constant current circuit 2. After the full charge, a high-level signal is generated from output terminals P8 and P9, and the oscillation is stopped, because the duty ratio becomes zero. While a high-level signal is generated from the output terminal P8 and a low-level signal is generated from the output terminal P9, a reference voltage at the input terminal P7 is lowered and the duty ratio of the on/off oscillation is reduced. As a result, the trickle charging is carried out at a current much lower than a charging one.