Constant-voltage circuit capable of reducing time required for starting, semiconductor apparatus including constant-voltage circuit, and control method of constant-voltage circuit

Constant-voltage circuit capable of reducing time required for starting, semiconductor apparatus including constant-voltage circuit, and control method of constant-voltage circuit

A constant-voltage circuit (1) includes a switching regulator (2) and a series regulator (3) each configured to start operating according to a selection signal input from outside for exclusively causing one of the switching and series regulators to operate, and convert an input voltage (Vin) input t...

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Hauptverfasser: SAKAI, YOHICHI, AGARI, HIDEKI
Format: Patent
Sprache:eng ; fre ; ger
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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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creator SAKAI, YOHICHI
AGARI, HIDEKI
description A constant-voltage circuit (1) includes a switching regulator (2) and a series regulator (3) each configured to start operating according to a selection signal input from outside for exclusively causing one of the switching and series regulators to operate, and convert an input voltage (Vin) input to an input terminal (IN) to a rated voltage to output to an output terminal (OUT). The switching regulator performs a soft-start operation for raising an output voltage (Vout) to the rated voltage at a constant speed when starting operation. The series regulator regulates a current so that an output current does not exceed a predetermined value, simultaneously starts operating when the switching regulator starts operating, and automatically stops outputting a current to the output terminal when the soft-start operation is completed. A semiconductor apparatus provided with a predetermined function includes the constant-voltage circuit. A control method controls the constant-voltage circuit.
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subjects 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
title Constant-voltage circuit capable of reducing time required for starting, semiconductor apparatus including constant-voltage circuit, and control method of constant-voltage circuit
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