Fdk Corporation

Eiji Nagashima

Yoshiyasu Nakashima

Yu Yonezawa

Toshio Shibata

Jun Oikawa

A current detection circuit included in a power supply detects a current flowing to an inductance element from a detection tap of an inductance element connected between an output terminal and an output of a first switching element. A control circuit included in the power supply controls a first control terminal of the first switching element and a second control terminal of a second switching element and calculates an output current flowing to a load based on the current detected by the current detection circuit.

Power supply and control method for power supply

A DC/DC converterof the present invention is provided with a constant-voltage power supply circuit; a SENSE+ terminal; a SENSE&#x2212;/OCPSEL terminal pulled up to a predetermined voltage VL through a pull-up resistor R; and a controllerfor controlling the constant-voltage power supply circuit, wherein the controllercontrols the output voltage Vout of the constant-voltage power supply circuiton the basis of a potential difference between the SENSE+ terminal and the SENSE&#x2212;/OCPSEL terminal, on the condition that the voltage of the SENSE&#x2212;/OCPSEL terminal is lower than a threshold voltage, and sets predetermined control parameters on the basis of the voltage of the SENSE&#x2212;/OCPSEL terminal, on the condition that the voltage of the SENSE&#x2212;/OCPSEL terminal is equal to or higher than the threshold voltage.

Growing community of inventors

Tokyo, Japan

Eiji Nagashima