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LED sampling BOOST output protecting combinational circuit

A technology of output protection and circuit, applied in the field of power conversion circuit, can solve the problems of poor reliability, high power consumption, low efficiency, etc., and achieve the effect of high power factor, low power consumption and low cost

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

AI Technical Summary

Problems solved by technology

[0008] The invention provides an LED sampling BOOST output protection combination 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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  • LED sampling BOOST output protecting combinational circuit
  • LED sampling BOOST output protecting combinational circuit
  • LED sampling BOOST output protecting combinational circuit

Examples

Experimental program
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Embodiment Construction

[0023] The LED sampling BOOST output protection combination 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 terminal of the input current sampling circuit, and the output terminal of the freewheeling inductor is connected to the input of 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 th...

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Abstract

The invention provides an LED sampling BOOST output protecting combinational circuit. A width modulation type pulse control circuit of the LED sampling BOOST output protecting combinational circuit generates PWM type pulse signals according to current sampling signals input by an input sampling circuit and / or an output sampling circuit; a follow current voltage sampling circuit produces alternating current and direct current signals or positive pole and negative pole signals or follow current signals by sampling current signals of a VMOS switching circuit and a follow current circuit, and the alternating current and direct current signals or positive pole and negative pole signals or follow current signals are input into a driving signal synthesis circuit; an input current sampling circuit generates sampling signals by sampling a current which is input by an input power source and passes through a follow current inductor, and the sampling signals are processed by being provided for the width modulation type pulse control circuit. The LED sampling BOOST output protecting combinational circuit solves the problems that an existing low-voltage new energy power adapter is high in power consumption, low in efficiency and poor in reliability.

Description

technical field [0001] The invention relates to a power conversion circuit. 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 rectifier circuit is relatively high, high power consumption is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/00
Inventor 胡家培胡民海
Owner XIAN ZHIHAI POWER TECH