Synchronous boost-buck device and synchronous buck-buck method thereof

Abstract

The invention discloses a synchronous boost-buck device and a synchronous buck-buck method thereof. The synchronous boost-buck device comprises an MCU (Microprogrammed Control Unit), an input voltage sampling module, an output voltage sampling module, an output current sampling module and a synchronous boost-buck conversion module, wherein the MCU is respectively connected with the input voltage sampling module, the output voltage sampling module, the output current sampling module and the synchronous boost-buck conversion module, the input voltage sampling module and the output voltage sampling module are respectively connected with an input port and an output port of the device, and the synchronous boost-buck conversion module is respectively connected with the input port, the output port and the output current sampling module. In the invention, the synchronous boost-buck conversion module is started for boosting or bucking or first boosting and then bucking through an input voltage acquired by the input voltage sampling module, and meanwhile, the synchronous boost-buck conversion module is controlled to output a corresponding voltage value and a corresponding current value according to an output voltage and an output current so as to satisfy the power supply needs of portable equipment.

Description

technical field [0001] The invention relates to voltage-boosting technology, in particular to a synchronous voltage-boosting device and a method for realizing synchronous voltage-boosting. Background technique [0002] High-power portable devices, such as portable medical devices and notebook computers, generally have a DC / DC power supply (DC-to-DC power supply) or a charging management module, so a step-up / down device is usually required in such devices. [0003] The step-up / step-down device controlled by software generally controls separate hardware step-up modules and step-down modules through software, and enables selection of the step-up module or step-down module through the control chip. As we all know, the step-up module and the step-down module contain many electronic components, which need to occupy a certain area on the circuit board, which does not meet the requirements of miniaturization of electronic products, and the step-up or step-down is controlled by hardw...

AI Technical Summary

Problems solved by technology

As we all know, the step-up module and the step-down module contain many electronic components, which need to occupy a certain area on the circuit board, which does not meet the requirements of miniaturization of electronic products, and the step-up or step-down is controlled by hardware, which has poor flexibility. The voltage value of step-up and step-down cannot be precisely controlled and cannot meet the actual working needs

[0004] Moreover, the price of the control chip used in the above-mentioned step-up / down device is relatively high, and there are many electronic components, which makes the cost of the product higher, reduces the competitiveness of the product in the market, and is inconvenient for product debugging and maintenance.

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