A wide output voltage range single-input double-output converter and its control method

Abstract

The invention provides a wide-output voltage range single-input dual-output converter and a control method thereof. Four diodes form two bridge arms; the first bridge arm is connected with a first inductor; the first inductor is connected with the drain of a first switching transistor and the source of a third switching transistor; the source of the first switching transistor is connected with thefirst bridge arm, the second bridge arm and the negative electrode of a first capacitor; the source of the second switching transistor is connected with the drain of a third switching transistor anda second inductor; the drain of the second switching transistor is connected with the positive electrodes of the first capacitor and a second capacitor; and the negative electrode of the second capacitor is connected with the other end of the second inductor. Through reuse of the switching transistors, the use of power devices is reduced, the power density and the whole conversion efficiency of the converter are improved, a wide output voltage range is realized, the control is simple, no extra decoupling circuit is needed, and through the dual output topology advantages, the capacitance of theDC-side filter capacitor is greatly reduced, and the needed output voltage is ensured to be stable.

Description

technical field [0001] The invention relates to the field of power electronic converters, in particular to a single-input double-output converter and a control method thereof. Background technique [0002] Applications such as photovoltaic systems, hybrid electric / fuel cell vehicles, personal computers, digital cameras, portable test instruments, etc. contain multiple functional modules, such as mobile phone RF transceiver circuits, IO interface modules, AD / DA modules, microprocessors, digital signal processing circuits, etc. With the development of modern power electronics technology, the requirements for high speed and low power consumption are getting higher and higher, so each functional module needs to balance the relationship between power consumption, speed and noise to obtain the most optimized design. The use of multiple voltages can effectively reduce power consumption, improve battery life, and meet speed requirements at the same time. Although multiple single-i...

AI Technical Summary

Problems solved by technology

Although multiple single-input single-output (Single Input Single Output: SISO) converters can meet the requirements and are simple to implement, there is beat frequency interference, and multiple power transistors and external filter inductors are required, and the number of components is significantly increased, resulting in unreasonable Expect high cost and volume

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