Boost-type switching power device
AssigneeToko, Inc.
InventorTetsushi Otake
Life of this patent
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Abstract
A boost-type switching power device which obtains a dc output by connecting a rectifying diode to the output side of an inductance element, connected in series to a main switching element, the device including: a control circuit which controls the operation of the main switching element by using a feedback signal in accordance with the dc output; and a constant-current circuit comprising a plurality of active elements, which are provided between the the rectifying diode and the output terminal; and wherein, when there is an overload on the output side, the operation of the active elements comprising the constant-current circuit controls the control circuit, switching the main switching element off and thereby stopping the boost function, and, in addition, the output is controlled by the constant-current circuit.
Claims3
A boost-type switching power device which obtains a dc output by connecting a rectifying diode to the output side of an inductance element, connected in series to a main switching element, the device comprising:
- a control circuit which controls the operation of said main switching element by using a feedback signal from the output;
- and a constant-current circuit comprising a plurality of active elements, which are provided between the said rectifying diode and the output terminal;
- and wherein,
- when the current supplied to the output side has become overloaded, the operation of the active elements comprising said constant-current circuit controls the operation of said control circuit so as to switch off said main switching element and thereby stop the boost function, and, in addition, a current restricted to a predetermined size is supplied to the output side.
Dependencies are inferred from the claim text.