VMOS switching control circuit with robustness

A switch control circuit and switch circuit technology, applied in the direction of electrical components, output power conversion devices, etc., can solve problems such as poor reliability, high power consumption, and low efficiency, and achieve high power factor, low power consumption, and low cost. Effect

Inactive Publication Date: 2014-06-11
XIAN ZHIHAI POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention provides a robust VMOS switch control circuit, which mainly solves the problems of high power consumption, low efficiency and poor reliability of existing low-voltage new energy power converters

Method used

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  • VMOS switching control circuit with robustness
  • VMOS switching control circuit with robustness
  • VMOS switching control circuit with robustness

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Embodiment Construction

[0023] The robust VMOS switch control circuit includes an input power supply, the output terminals of the input power supply are respectively connected to the input terminals of the freewheeling inductor and the input terminals of the input current sampling circuit, and the output terminals of the freewheeling inductor are connected to the VMOS switch circuit The input end of the VMOS switch circuit is also connected to the output end of the control circuit, and the output end of the VMOS switch circuit is connected to the load through the reverse isolation circuit and the energy storage filter circuit in turn; the control circuit includes a width-adjustable pulse Control circuit, drive signal synthesis circuit, VMOS switch drive circuit and freewheeling voltage sampling circuit, the input end of the width-adjustable pulse control circuit is respectively connected with the output end of the input current sampling circuit and the output end of the output current sampling circuit....

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Abstract

The invention provides a VMOS switching control circuit with robustness. The VMOS switching control circuit with the robustness mainly solves the problems that an existing low-voltage new energy power converter is high in power consumption, low in efficiency and poor in reliability. An output current sampling circuit of the VMOS switching control circuit with the robustness comprises a current sensor CS2, a capacitor C9 and a diode D5, the current sensor CS2 and the diode D5 are connected in series to form a subcircuit, and the capacitor C9 is connected with the subcircuit in parallel. A reverse isolation circuit is formed by a VMOS group performing synchronous rectification with a VMOS switching circuit and is synchronously driven by a driving signal synthesis circuit through a freewheeling driving circuit. An energy storage filter circuit is provided with a capacitor, the positive end of the capacitor is connected with the positive end of a load, and the negative end of the capacitor is connected with the negative end of the load. An output protection circuit is further arranged before the load.

Description

technical field [0001] The invention relates to a VMOS switch control circuit, which belongs to the technical field of power conversion. Background technique [0002] In recent years, photovoltaic power generation, wind power generation, battery power supply and other renewable new energy systems with AC low voltage and DC low voltage power supply have been widely used. It is imperative to improve the power supply efficiency, power supply quality and power supply reliability of low voltage new energy power supply systems. [0003] At present, the power conversion known in the art basically adopts: [0004] 1. AC (AC) input, using a full-wave rectifier to rectify the input AC (AC) power to DC (DC) power, and then convert DC / DC to DC (DC) output. This kind of scheme solves the conversion problem of higher input voltage AC power supply and low-power power supply. However, when low-voltage AC power input and high-power power conversion, because the voltage drop of the AC / DC re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/088H02M1/32
Inventor 胡家培胡民海
Owner XIAN ZHIHAI POWER TECH
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