Switching power supply apparatus

A switching power supply apparatus of each embodiment includes: a switch circuit configured to supply a pulse output to a load; a drive signal control circuit configured to perform ON/OFF driving operation of the switch circuit according to a duty ratio of a PWM signal; an error detection amplifier...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	Otsuka, Masafumi
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:	A switching power supply apparatus of each embodiment includes: a switch circuit configured to supply a pulse output to a load; a drive signal control circuit configured to perform ON/OFF driving operation of the switch circuit according to a duty ratio of a PWM signal; an error detection amplifier configured to compare output voltage supplied to the load and reference voltage and generate an error detection signal; a comparator configured to generate the PWM signal by comparison between a slope signal that starts level change in a cycle of the PWM signal and the error detection signal and give the PWM signal to the drive signal control circuit; and a spread spectrum correction circuit configured to generate an offset corresponding to the fluctuation of the cycle of the PWM signal and add the generated offset to the slope signal or the error detection signal.