CLOSED LOOP STABILITY RAMP IMPLEMENTATION FOR CONSTANT ON-TIME BUCK CONVERTER

CLOSED LOOP STABILITY RAMP IMPLEMENTATION FOR CONSTANT ON-TIME BUCK CONVERTER

An integrated circuit device includes: one or more switches of a Buck converter; and a control circuit for the Buck converter, including: a comparator configured to compare a feedback voltage of the Buck converter with a compensation ramp voltage; a pulse generator configured to generate, in respons...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Corona, Stefano, Lissoni, Fulvio Ottavio, Rossi, Sandro, Bottarel, Valeria, Brambilla, Niccolo
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:An integrated circuit device includes: one or more switches of a Buck converter; and a control circuit for the Buck converter, including: a comparator configured to compare a feedback voltage of the Buck converter with a compensation ramp voltage; a pulse generator configured to generate, in response to a rising edge in a comparator output signal, a pulse signal for controlling the Buck converter; a transconductance amplifier (TA) configured to generate, at an output terminal of the TA, a current proportional to a difference between a reference voltage and the feedback voltage; a capacitor coupled between an output terminal of the TA and a reference voltage node; and a ramp signal generator configured to generate the compensation ramp voltage by adding a voltage at the output terminal of the TA and a ramp voltage having a gradient proportional to a switching frequency of the Buck converter.