CONTROL CIRCUIT FOR SWITCHING REGULATOR, SWITCHING REGULATOR USING THE SAME, AND ELECTRONIC APPARATUS

PROBLEM TO BE SOLVED: To improve the line regulation of a hysteresis-controlled switching regulator.SOLUTION: An output voltage V' divided by a first resistance R1 and a second resistance R2 is input into a first polarity input terminal of a comparator 22. A driver 20 controls a switching trans...

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Bibliographische Detailangaben
1. Verfasser:	OYAMA MANABU
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 CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To improve the line regulation of a hysteresis-controlled switching regulator.SOLUTION: An output voltage V' divided by a first resistance R1 and a second resistance R2 is input into a first polarity input terminal of a comparator 22. A driver 20 controls a switching transistor M1 and a synchronous rectification transistor M2 according to an output pulse S1 of the comparator 22. A feedback circuit 24 outputs a switching signal S2 switching between two voltage levels of an input voltage Vand a ground voltage Vto the inverting input terminal of the comparator 22 according to the output pulse S1. An error amplifier 30 amplifies an error between the divided output voltage V' and a predetermined first reference voltage Vto generate a second reference voltage V, which is output to a second polarity input terminal of the comparator 22.