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A technology to improve the efficiency of buck circuit

A circuit and inductor technology, applied in the field of improving the efficiency of buck circuits, can solve problems such as the inability to be put into large-scale commercial manufacturing

Active Publication Date: 2017-05-24
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are limited by the limits of process improvement, manufacturing cost considerations, etc., and cannot be put into large-scale commercial manufacturing

Method used

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  • A technology to improve the efficiency of buck circuit
  • A technology to improve the efficiency of buck circuit
  • A technology to improve the efficiency of buck circuit

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Embodiment Construction

[0024] Several technical features and advantageous details of the application are explained more fully with reference to the non-limiting embodiments shown in the drawings and detailed in the following description. Also, the following description omits the description of known raw materials, processing techniques, components and equipment, so as not to unnecessarily confuse the technical gist of the application. However, those skilled in the art will understand that, in describing the embodiments of the present application hereinafter, the description and specific examples are given by way of illustration only and not limitation.

[0025] Wherever possible, the same numbers will be used throughout the drawings to refer to the same or like parts. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant according to his or her judgm...

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Abstract

The invention discloses a technology for improving the efficiency of a BUCK circuit. According to the BUCK circuit, a PMOS tube, an NMOS tube and a gating controller are added to a conventional BUCK circuit, the gating of the NMOS of the PMOS tube is controlled according to the duty ratio of an output node voltage signal, the dynamic reduction of the whole Rdson of the PMOS tube and NMOS tube is realized under different output situations, and the efficiency of the BUCK circuit is improved.

Description

technical field [0001] The present application generally relates to a technique for improving the efficiency of a BUCK circuit, and in particular to an improved BUCK circuit. Background technique [0002] In electronic equipment using a DC source, a voltage converter is required to convert the voltage of the power supply to the required operating voltage. The BUCK circuit is a widely used step-down conversion circuit, which is mainly used for step-down conversion of direct current to direct current (DC-DC), and is usually suitable for low-voltage and high-current applications. [0003] The circuit structure of a conventional BUCK circuit 100 is as Figure 1A shown in the schematic diagram. Figure 1A The BUCK circuit mainly includes switching element network, PWM modulation and driving module, current sensing and compensation module, error feedback module and so on. exist Figure 1A Among them, Vdd is the input terminal of the BUCK circuit, wherein the first PMOS transistor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155
CPCH02M3/1582
Inventor 樊茂
Owner SPREADTRUM COMM (SHANGHAI) CO LTD