Switching control circuit and switching power-supply device
AssigneeSanken Electric Co., Ltd.
InventorsTakeki Sugahara, Osamu Ohtake
Life of this patent
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Abstract
Disclosed is a switching control circuit for performing an ON-OFF control of a switching element. The switching control circuit includes a first external terminal; a second external terminal; a passive element connected between the first external terminal and the second external terminal; and a function setting circuit, which performs a function setting based on a constant of the passive element. An electric potential at the first external terminal and an electric potential at the second external terminal are controlled.
Claims14
A switching control circuit for performing an ON-OFF control of a switching element, comprising:
- a first external terminal, wherein an electric potential at the first external terminal is controlled;
- a second external terminal, wherein an electric potential at the second external terminal is controlled;
- a passive element connected between the first external terminal and the second external terminal;
- a current supply circuit configured to supply an electric current, via the second external terminal, to the passive element in a period when the electric potential of the first external terminal is fixed at a particular level;
- and
- a function setting circuit, which performs a function setting based on a constant of the passive element.
A switching power-supply device comprising:
- a switching control circuit comprising:
- a first external terminal, wherein an electric potential at the first external terminal is controlled;
- a second external terminal, wherein an electric potential at the second external terminal is controlled;
- a passive element connected between the first external terminal and the second external terminal;
- a current supply circuit configured to supply an electric current, via the second external terminal, to the passive element in a period when the electric potential of the first external terminal is fixed at a particular level;
- and
- a function setting circuit, which performs a function setting based on a constant of the passive element;
- a switching element, which is ON-OFF controlled by the switching control circuit;
- and
- wherein a second voltage is generated from a first voltage by a switching operation of the switching element.
A switching control circuit comprising:
- a first external terminal, wherein an electric potential at the first external terminal is controlled;
- a second external terminal, wherein an electric potential at the second external terminal is controlled;
- a passive element connected between the first external terminal and the second external terminal;
- a function setting circuit, which performs a function setting based on a constant of the passive element;
- and
- a transistor configured to control, based on the constant of the passive element, a function setting other than the function setting of the function setting circuit.
Dependencies are inferred from the claim text.