US 8,912,769 B2Granted

Current mode buck-boost converter

AssigneeEnergy Pass, Inc.

InventorsMing-Wei Lin, Robert Yung-His Tsu, Ching Long Lin, Ke-Horng Chen, Yu-Huei Lee, Shih-Wei Wang, Wei-Chan Wu, Ping-Ching Huang

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Abstract

A current mode buck-boost converter has an input terminal, an output terminal, and an output capacitor coupled to the output terminal. The input terminal is used to receive an input voltage, and the output terminal is for producing the output voltage. The current mode buck-boost converter comprises a voltage converter and a control circuit. The voltage converter comprises an inductor. The control circuit is for detecting the current passing through the inductor to determine the electric energy transmitted to the output terminal by the voltage converter. Accordingly, the current mode buck-boost converter has fast response, and the electrical energy can be recycled and stored to the voltage source when the current mode buck-boost converter operates in down-tracking process.

Claims17

Dependent claims

A current mode buck-boost converter, having an input terminal, an output terminal and an output capacitor coupled to the output terminal, the input terminal being used to receive an input voltage, the output terminal being used to generate an output voltage, the current mode buck-boost converter comprising:

a voltage converter comprising an inductor;
and
a control circuit for detecting a current passing through the inductor to determine an electrical energy transmitted to the output terminal by the voltage converter, the control circuit comprising:
a first switch coupled to the input terminal and a second terminal of the inductor;
and
a second switch coupled to the output terminal and a first terminal of the inductor;
wherein the control circuit controls the first switch and the second switch according to a system controlling voltage to raise the output voltage from a standby voltage to an operating voltage or reduce the output voltage from the operating voltage to the standby voltage, wherein the standby voltage is lower than the input voltage, and the operating voltage is higher than the input voltage, and the system controlling voltage is used to indicate a load power requirement.

4 more elements

A direct current voltage converting method, adapted to convert an electrical energy of a voltage source and transmit the electrical energy to an output terminal by a voltage converter, the method comprising:

providing the voltage source coupled to the voltage converter;
detecting a current passing through an inductor of the voltage converter;
and
determining a magnitude of the converted electrical energy transmitted to the output terminal by the voltage converter according to the detected current, wherein the step comprises:
increasing the voltage at the output terminal from the standby voltage to the operating voltage or reducing the voltage at the output terminal from the operating voltage to the standby voltage according to a control voltage, wherein the control voltage indicates the load power requirement.

2 more elements

Dependencies are inferred from the claim text.