US 2014/0191737 A1Published application

Power-supply apparatus

AssigneeRenesas Electronics Corporation

InventorsToshio NAGASAWA, Yoshitaka ONAYA, Koji SAIKUSA, Shin CHIBA

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Abstract

A power-supply apparatus according to an aspect includes an inductor, a transistor that supplies, in an on-state, a current to the input side of the inductor, a second transistor that becomes, when the first transistor is in an off-state, an on-state and thereby brings the input side of the inductor to a predetermined potential, a signal generation unit that generates voltage signals corresponding to a current flowing to the inductor, an amplifier that outputs a current according to the voltage signals, a converter that converts the current output from the amplifier into a voltage signal, and a control unit that controls the transistors based on a first feedback signal corresponding to the voltage on the output side of the inductor and the voltage signal, which is used as a second feedback signal.

Claims12

Dependent claims

A power-supply apparatus comprising:

an inductor;
a first transistor that supplies, in an on-state, a current to an input side of the inductor;
a second transistor that becomes, when the first transistor is in an off-state, an on-state and thereby brings the input side of the inductor to a predetermined potential;
a signal generation unit that generates a first voltage signal corresponding to a first current flowing to the inductor;
a trans-conductance amplifier that outputs a second current according to the first voltage signal generated by the signal generation unit;
a converter that converts the second current output from the trans-conductance amplifier into a second voltage signal;
and
a control unit that controls the first and second transistors based on a first feedback signal corresponding to a voltage on an output side of the inductor and the second voltage signal, the second voltage signal being used as a second feedback signal.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/096,499Filed 4 Dec 2013
Priority: JP 2013-0016429 Jan 2013
Published: 10 Jul 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H02M 3/158
With automatic control of output voltage or current, e.g. switching regulators: including plural semiconductor devices as final control devices…
H02M 3/156
Using semiconductor devices only: with automatic control of output voltage or current, e.g. switching regulators
H02M 3/1584
Including plural semiconductor devices as final control devices for a single load: with a plurality of power processing stages connected in parallel
H02M 3/1588
Including plural semiconductor devices as final control devices for a single load: comprising at least one synchronous rectifier element

Family

US 9,054,583 B2Related patent
US 2014/0191737 A1This patent

From the US filing history. Foreign family members aren’t listed.

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