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US 6,307,359 B1Granted
DC-DC converter powered by doubled output voltage
AssigneeNEC Corporation
InventorTakahito Uchida
Life of this patent
Estimating the term…
Abstract
In a DC-DC converter including an inductor connected to an input terminal, a MOS transistor connected between the inductor and a ground terminal, a diode for supplying energy accumulated by the inductor to an output terminal, a capacitor connected between the output terminal and the ground terminal, a driver circuit for driving the MOS transistor, and a control circuit for controlling the driver circuit, a voltage doubler is provided to generate a power supply voltage approximately twice an output voltage at the output terminal and supply the power supply voltage to the driver circuit and the control circuit.
Claims17
A DC-DC converter comprising:
- an input terminal;
- an output terminal;
- a ground terminal;
- a first inductor connected to said input terminal;
- a MOS transistor connected between said first inductor and said ground terminal;
- a first diode, connected between a drain of said MOS transistor and said output terminal, for supplying energy accumulated by said first inductor to said output terminal;
- a first capacitor connected between said output terminal and said ground terminal;
- a voltage doubler, connected to said output terminal, for generating a power supply voltage approximately twice an output voltage at said output terminal;
- a driver circuit, powered by said power supply voltage, for driving said MOS transistor;
- and
- a control circuit, powered by said power supply voltage, for controlling said driver circuit,
- wherein said voltage doubler is charged by said first capacitor when said MOS transistor is driven by a predetermined output voltage of said driver circuit.
9 more elements
A DC-DC converter comprising;
- an input terminal;
- an output terminal;
- a ground terminal;
- a first inductor connected to said input terminal;
- a MOS transistor connected between said first inductor and said ground terminal;
- a first diode, connected between a drain of said MOS transistor and said output terminal, for supplying energy accumulated by said first inductor to said output terminal;
- a first capacitor connected between said output terminal and said ground terminal;
- a voltage doubler, connected to said output terminal, for generating a power supply voltage approximately twice an output voltage at said output terminal;
- a driver circuit, powered by said power supply voltage, for driving said MOS transistor;
- and
- a control circuit, powered by said power supply voltage, for controlling said driver circuit,
- wherein said voltage doubler comprises:
- a second diode connected to said output terminal;
- a second capacitor connected between said second diode and the drain of said MOS transistor;
- a third diode connected to said second diode;
- and
- a third capacitor, connected between said third diode and said ground terminal, for generating said power supply voltage.
14 more elements
A DC-DC converter comprising:
- an input terminal;
- an output terminal;
- a ground terminal;
- an inductor connected to said input terminal;
- a MOS transistor connected between said inductor and said ground terminal;
- a first diode, connected between a drain of said MOS transistor and said output terminal, for supplying energy accumulated by said inductor to said output terminal;
- a first capacitor connected between said output terminal and said ground terminal;
- a second diode connected to said output terminal;
- a second capacitor connected between said second diode and the drain of said MOS transistor;
- a third diode connected to said second diode;
- a third capacitor, connected between said third diode and said ground terminal, for generating a power supply voltage;
- a driver circuit, connected to said second capacitor and powered by said power supply voltage, for driving said MOS transistor;
- and
- a control circuit, connected to said second capacitor and powered by said power supply voltage, for controlling said driver circuit.
11 more elements
A DC-DC converter comprising:
- an input terminal;
- an output terminal;
- a ground terminal;
- a first inductor connected to said input terminal;
- a MOS transistor connected between said first inductor and said ground terminal;
- a first capacitor connected to said a drain of said MOS transistor;
- a second inductor, connected between said first capacitor and said ground terminal;
- a first diode, connected between said first capacitor and said output terminal, for supplying energy accumulated by said first inductor and discharged by said second inductor to said output terminal;
- a second capacitor connected between said output terminal and said ground terminal;
- a second diode connected to said output terminal;
- a third capacitor connected between said second diode and the drain of said MOS transistor;
- a third diode connected to said second diode;
- a fourth capacitor, connected between said third diode and said ground terminal, for generating a power supply voltage;
- a fourth diode connected between said input terminal and said fourth capacitor;
- a driver circuit, connected to said fourth capacitor and powered by said power supply voltage, for driving said MOS transistor;
- and
- a control circuit, connected to said fourth capacitor and powered by said power supply voltage, for controlling said driver circuit.
14 more elements
A converter comprising:
- an input terminal;
- an output terminal;
- a ground terminal;
- a first inductor connected to said input terminal;
- a transistor connected between said first inductor and said ground terminal;
- a first diode, connected between a drain of said transistor and said output terminal, for supplying energy accumulated by said first inductor to said output terminal;
- a first capacitor connected between said output terminal and said ground terminal;
- a voltage doubler, connected to said output terminal, for generating a power supply voltage approximately twice an output voltage at said output terminal;
- a driver circuit, powered by said power supply voltage, for driving said transistor;
- a control circuit, powered by said power supply voltage, for controlling said driver circuit,
- wherein said voltage doubler comprises:
- a second diode connected to said output terminal;
- and
- a second capacitor connected between said second diode and the drain of said transistor.
11 more elements
Dependencies are inferred from the claim text.