CHARGING CIRCUIT AND ELECTRONIC APPARATUS USING THE SAME

PROBLEM TO BE SOLVED: To provide a charging circuit that has a reduced circuit area while ensuring a tolerance to overvoltage input.SOLUTION: A switching transistor M1 comprises a high voltage element. A pulse modulator 10 generates a pulse signal S1 having a duty ratio depending on a voltage Vthat...

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Bibliographische Detailangaben
Hauptverfasser:	ANDO KIMIO, YAMAMOTO ISAO
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:	PROBLEM TO BE SOLVED: To provide a charging circuit that has a reduced circuit area while ensuring a tolerance to overvoltage input.SOLUTION: A switching transistor M1 comprises a high voltage element. A pulse modulator 10 generates a pulse signal S1 having a duty ratio depending on a voltage Vthat is a combination of output voltages V-Vof error amplifiers EA1-EA3. A backflow prevention circuit 12 (1) turns on a first switch SW1 parallel with a body diode D1 with an anode directed to an input terminal P1 if V>V, and (2) turns on a second switch SW2 parallel with a body diode D2 with a cathode directed to the input terminal P1 if V>V.