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Digital single-inductor dual-output switching converter and control method

A single-inductor dual-output, switching converter technology, applied in output power conversion devices, high-efficiency power electronic conversion, conversion equipment without intermediate conversion to AC, etc., can solve the problem of high area and price, reduce power system space, and cannot Save chip area and chip pins and other issues, achieve the effect of superior overall performance and improved transient response

Inactive Publication Date: 2017-09-12
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional multiplexers require multiple power transistors and external filter inductors, which not only cannot save chip area and chip pins, but also is not conducive to reducing the space of the power system, and the occupied area and price are relatively high

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  • Digital single-inductor dual-output switching converter and control method
  • Digital single-inductor dual-output switching converter and control method
  • Digital single-inductor dual-output switching converter and control method

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Embodiment Construction

[0028] In order to effectively improve system integration and reduce the cost of hardware circuits, and at the same time be able to monitor and adjust different operating voltages online in real time based on different hardware circuit working levels, thereby reducing hardware circuit energy consumption and prolonging standby time, the present invention proposes a digital single-inductor dual-output The switching converter and its control method achieve two-way voltage stable output by multiplexing the same inductor. By using the incremental PID control algorithm and selecting the control method and structure combining differential mode, common mode voltage control and average current control, the The two output voltages are adjusted in real time to reach the preset voltage reference value.

[0029] combine figure 1 , the digital single-inductance dual-output switching converter of the present invention includes a Buck type single-inductance dual-output switching converter pow...

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Abstract

The invention discloses a digital single-inductor dual-output switching converter and a control method. The device comprises a Buck type single-inductor dual-output switching converter power-level main topology structure, an A / D sampling conversion unit, a digital controller, and a DPWM unit. The control method comprises the following steps: respectively sampling an analog output voltage value and an analog inductor current value of the Buck type single-inductor dual-output switching converter power-level main topology structure by the A / D sampling conversion unit, and converting an analog signal into a digital signal to be input to the digital controller; determining an output voltage error value and an inductor current error value by the digital controller, and acquiring a duty ratio of a switching cycle; outputting a corresponding PWM signal according to the duty ratio to drive a switching state of a power tube in the Buck type single-inductor dual-output switching converter power-level main topology structure so as to adjust the output voltage value by the DPWM unit. With the adoption of a method for combining difference-mode and common-mode voltage control and average current control, transient response of the digital control converter is improved.

Description

technical field [0001] The invention relates to the technical field of multiple conversion circuits, in particular to a digital single-inductance double-output switching converter and a control method. Background technique [0002] With the rapid development of mobile Internet information technology, many mobile smart terminals such as smart phones, tablet computers and other devices are becoming thinner and thinner, while the requirements for device performance processing are increasing day by day. The thinner and lighter volume of the system and the increasing performance requirements mean that the internal power density of the chip is getting higher and higher. In order to obtain excellent processing performance while prolonging the battery life of smart terminals, each processing circuit expects to be able to dynamically adjust its operating voltage according to real-time performance requirements, thus requiring a multiplexer circuit. [0003] The requirement of the mul...

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Application Information

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IPC IPC(8): H02M3/07H02M1/088
CPCH02M1/088H02M3/07H02M1/0012H02M1/0048H02M1/009H02M3/072Y02B70/10
Inventor 孙大鹰姚宇许嘉哲封婷洪玮顾文华李力
Owner NANJING UNIV OF SCI & TECH