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Step-down DC/DC converter

A DC-DC and converter technology, applied in the field of step-down DC-DC converters, can solve problems such as unsatisfactory, and achieve the effects of continuous input and output current, high efficiency, and consistent polarity

Inactive Publication Date: 2018-09-28
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings that the existing basic DC-DC converters with a step-down function do not meet the requirements of "the input and output currents are continuous and the input and output voltages are of the same polarity", the present invention provides a step-down DC-DC converter The purpose is to realize the continuous input and output current and the same polarity of the input and output voltage, so as to expand the types of DC-DC converters

Method used

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] refer to figure 1 with figure 2 , a step-down DC-DC converter, including a resistor R1, a capacitor C1, a diode D2, a diode D1, an N-type MOS tube M1, an inductor L1, a capacitor Co and a controller, the controller has a port vg, One end of the resistor R1 is connected to the positive end of the DC power supply Vi, the other end of the resistor R1 is connected to one end of the capacitor C1 and the drain of the N-type MOS transistor M1 at the same time, and the other end of the capacitor C1 is connected to the cathode of the diode D2 and the drain of the diode D1 at the same time. The anode is connected, the cathode of the diode D1 is connected to the source of the N-type MOS transistor M1 and one end of the inductor L1 at the same time, the other end of the inductor L1 is connected to one end of the capacitor Co and one end of the load Z at the same time, and...

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Abstract

The invention provides a step-down DC / DC converter comprising a resistor R1, a capacitor C1, a diode D2, a diode D1, an N-type MOS transistor M1, an inductor L1, a capacitor Co and a controller, wherein the controller can adopt a conventional power supply control chip, the function of the resistor R1 is to ensure that a voltage vC1 of the capacitor C1 is less than an input voltage Vi, when the N-type MOS transistor M1 is turned off, the diode D1 is turned on, a DC power supply Vi simultaneously supplies power to the capacitor C1 and a load Z, and the capacitor C1 stores energy; and when the N-type MOS transistor M1 is turned on, the diode D1 is turned off, and the DC power source Vi and the capacitor C1 jointly supply power to the load Z, and the capacitor C1 releases the energy. The step-down DC / DC converter provided by the invention realizes that the input and output current is continuous and the input and output voltages have the same polarity, and the type of the DC-DC converter isexpanded.

Description

technical field [0001] The invention relates to a direct current-direct current (DC-DC) converter, especially a step-down DC-DC converter with continuous input and output currents and the same polarity of input and output voltages, which can be used as a basic unit to form multi-input and Multi-output DC power system, such as: DC power module parallel system, LED array drive system, distributed photovoltaic power generation system, etc. Background technique [0002] The existing basic DC-DC converters with step-down function include Buck converter, Buck-Boost converter, Cuk converter, Sepic converter and Zeta converter. As listed in Table 1, without considering the output capacitor, none of the above five basic DC-DC converters with step-down function satisfies the requirement of "continuous input and output currents and the same polarity of input and output voltages". Require. [0003] [0004] Table 1. Contents of the invention [0005] In order to overcome the sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156
CPCH02M3/156
Inventor 陈怡
Owner ZHEJIANG UNIV OF TECH
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