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Buck-boost DC/DC converter and buck-boost control method thereof for circuit system

A converter, buck-boost technology, applied in the field of buck-boost DC/DC converters, can solve the problems of small output current, short duration, inability to meet high-power continuous output current, etc., and achieve low design cost and reliability. High, the effect of ensuring long-term high-current output

Inactive Publication Date: 2017-02-22
SHANGHAI CAPENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the output current of the buck-boost DC / DC converter is small, even if it outputs a large current, its duration is short, so it cannot meet the demand for high-power continuous output current

Method used

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  • Buck-boost DC/DC converter and buck-boost control method thereof for circuit system
  • Buck-boost DC/DC converter and buck-boost control method thereof for circuit system

Examples

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Embodiment 1

[0026] This embodiment lists a buck-boost DC / DC converter composed of two DC / DC modules connected in parallel, such as figure 1 As shown, and one of the DC / DC modules is called the master DC / DC module 1, and the other DC / DC module is the slave DC / DC module 2. The DC / DC converter also sets equalization processing so that the master and slave DC / DC Signal synchronization between modules 1,2.

[0027] A single buck-boost DC / DC module 1, 2, which includes an input filter capacitor, an input sampling resistor that receives the signal from the input filter capacitor, a boost or buck circuit that receives the signal from the input sampling resistor, and a circuit that collects the signal from the boost or buck circuit Rectification module, synchronous rectification module is adopted in this embodiment, so as to reduce power consumption and improve the converter efficiency of DC / DC module 1, 2; Receive the output sampling resistor of the rectification module signal, receive the output...

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PUM

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Abstract

The invention discloses a buck-boost DC / DC converter and a buck-boost control method thereof. The buck-boost DC / DC converter is formed by parallel connection of a plurality of DC / DC modules. Each DC / DC module comprises an input filter capacitor, a sampling resistor, a buck-boost circuit, a rectifying module, an output sampling resistor, an output filter capacitor, a control chip, an input voltage sampling module, an input current sampling module, an output current sampling module and an output voltage sampling module. The sampling resistors receive input filter capacitor signals; the buck-boost circuits receive sampling resistor signals; the rectifying modules collect buck-boost circuit signals; the output sampling resistors receive rectifying module signals; the output filter capacitors receive output sampling resistor signals and output the same to the outside; the control chips control boosting modules or bucking modules; the input voltage sampling modules receive input filter capacitor signals and output the same to the control chips; the input current sampling modules receive input sampling resistor signals and output the same to the control chips; the output current sampling modules collect the output sampling resistor signals and output the same to the control chips; the output voltage sampling modules collect output filter capacitor signals and output the same to the control chips. The buck-boost DC / DC converter and the buck-boost control method thereof have the advantages that large currents can be outputted for a long time, simplicity and convenience in distribution are achieved, reliability is high, and design cost is low.

Description

technical field [0001] The present invention relates to a DC / DC converter, in particular to a buck-boost DC / DC converter which boosts or bucks an input DC voltage to ensure a constant output voltage and a buck-boost control method for a circuit system. Background technique [0002] A buck-boost DC / DC converter is a device that up-converts or down-converts an input voltage to provide a constant output voltage. Buck-boost DC / DC converters are usually used in automobiles and smart devices. When the input voltage is higher than the output voltage value, the step-down mode of the DC / DC converter can down-convert the input voltage to reach the target set value. When the input voltage is lower than the output voltage, the boost mode of the DC / DC converter can up-convert the input voltage so that the output voltage reaches the desired value. In the prior art, the output current of the buck-boost DC / DC converter is small, and even if it outputs a large current, its duration is shor...

Claims

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Application Information

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IPC IPC(8): H02M3/00
CPCH02M3/00H02M1/0067
Inventor 梁亚青廖运平蔡晓庆陈朝飞
Owner SHANGHAI CAPENERGY TECH CO LTD
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