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Buck converter

A step-down converter and converter circuit technology, which is applied in the direction of output power conversion devices, instruments, and conversion equipment without intermediate conversion to AC, and can solve the problems of deteriorating the performance of the step-down converter and increasing the output voltage, etc.

Active Publication Date: 2022-05-10
LEDVANCE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For buck converters not configured for high output voltages, increasing the output voltage can lead to defects that degrade the performance of the buck converter

Method used

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  • Buck converter

Examples

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Embodiment Construction

[0030] figure 1 The DC power supply 1 shown in is based on a high output voltage self-powered step-down converter according to the first aspect of the invention for converting an input direct current (DC) voltage to an output DC voltage for powering a DC powered device, such as an LED lamp or LED arrays, but not limited to.

[0031] The DC power supply 1 includes a buck converter 2 and an ACDC converter 3 for providing a DC input voltage to the buck converter 2 .

[0032] Buck converter 2 includes an input circuit 20 , a converter circuit 30 and an output circuit 40 .

[0033]The DC input circuit 20 includes a positive input terminal IN+ and a negative input terminal IN− for providing a DC input voltage to the converter circuit 30 . The DC output circuit 40 includes a positive output terminal OUT+, a negative output terminal OUT−, and an output capacitor C5 connected between the positive output terminal OUT+ and the negative output terminal OUT−. In this embodiment, the out...

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PUM

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Abstract

The present application discloses a buck converter for converting a DC input voltage to a DC output voltage, the buck converter comprising: a DC input circuit having a positive input terminal (IN+) and a negative input terminal (IN‑), with for providing a DC input voltage (Vi); a converter circuit (30) for converting the DC input voltage (Vi) to a DC output voltage (Vo); having a positive output terminal (OUT+), a negative output terminal (OUT‑) and a DC output circuit of an output capacitor (C5) connected between said positive output terminal (OUT+) and said negative output terminal (OUT‑); a switching device (IC) having a first A switch terminal (D) and a second switch terminal (CS) connected to the negative input terminal (IN-) via a charge diode (D1); charge inductor (L1); and frequency dependent return circuit (33 ), which connects the positive output terminal (OUT+) to the power supply terminal (Vcc) of the switching device (IC) to support the power supply of the switching device (IC).

Description

technical field [0001] This application relates generally to buck converters, and more particularly to high output voltage buck converters. Background technique [0002] More and more LED (Light Emitting Diode) products such as LED lamps and LED tubes require high luminous efficiency. Therefore, it is desirable that driver circuits for LED products should also have high efficiency. One way to increase the efficiency of LED products is to increase the output voltage of the LED driver. For buck converters that are not configured for high output voltages, increasing the output voltage can cause defects that degrade the performance of the buck converter. Contents of the invention [0003] The object of the present application is to provide a high output voltage buck converter and a method of operating the high output voltage buck converter. [0004] According to a first aspect, there is provided a buck converter for converting a DC input voltage into a DC output voltage, in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/06H05B45/375H02M3/156
CPCH02M3/06H02M3/156H05B45/375Y02B20/30
Inventor 林胜叠戴永昌
Owner LEDVANCE GMBH