Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Time digital converter (TDC) circuit for power tube sectional drive

A segmented drive, power tube technology, applied in the direction of output power conversion devices, electrical components, etc., can solve the problems of decreased sampling accuracy, unsuitable current detection, etc., and achieve the effect of stable segmentation

Inactive Publication Date: 2014-04-16
UNIV OF ELECTRONIC SCI & TECH OF CHINA
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current sampling method of the commonly used SenseFET mirror tube has good sampling accuracy under high load current, but the sampling accuracy will seriously drop under low load current, so it is not suitable for current detection under DCM

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Time digital converter (TDC) circuit for power tube sectional drive
  • Time digital converter (TDC) circuit for power tube sectional drive
  • Time digital converter (TDC) circuit for power tube sectional drive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035]This example mainly includes a segment-driven power tube, an LC filter circuit, a feedback control unit and the TDC circuit of the present invention. The feedback control unit is connected to the output of the Buck converter to generate a drive signal for the power tube and send it to the TDC module and the buffer circuit of the power tube. The TDC quantifies the conduction time of the power P tube, infers the current load current, and generates a segmented control code. The segment control code is connected to the buffer circuit to drive the power tube in segments.

[0036] In this example, the specific values ​​of some parameters in the aforementioned technical solution are as follows:

[0037] n=5, m=9, N=32, N 1 =10, N 2 =2,N 3 =2

[0038] That is, there are 5-digit segment control codes (the number of power pipe segments controlled under DCM is 5); the output of the summation module is represented by 9-digit binary numbers (the 10-period summation of 5-digit qu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an integrated circuit technique, particularly relates to a time-to-digital conversion circuit for power tube sectional drive in a DCM mode of a direct current (DC)-direct current (DC) convertor and discloses a TDC circuit for power tube sectional drive. The circuit comprises a time-to-digital conversion unit and a logic control unit. The time-to-digital conversion unit comprises a delay module and a latch module. The logic control unit comprises a frequency dividing module, a work sequence generation module, a summation module and a sectional determining module. The delay module is connected with the latch module, the summation module is connected with the latch module, the work sequence generation module and the sectional determining module respectively, and the work sequence module is connected with the frequency dividing module and the sectional determining module respectively. The circuit has the advantages that current detection of the DC-DC convertor under the DCM is achieved through the TDC circuit with logic control, and stable section division of the power tube is achieved. The circuit is particularly applicable to power tube sectional drive in the DCM mode of the direct current (DC)-direct current (DC) convertor.

Description

technical field [0001] The present invention relates to integrated circuit technology, in particular to a time-to-digital conversion (Time Digital Converter, TDC) circuit used for segmental driving of power tubes in DC-DC converter DCM mode. Background technique [0002] A DC-DC converter is a voltage converter that converts a non-fixed DC voltage to a fixed DC voltage, and is widely used in various electronic portable devices such as mobile phones and tablets. Common DC-DC converters are divided into three categories: Buck step-down converter, Boost step-up converter, and Buck-Boost step-down step-up converter. The conversion efficiency of the DC-DC converter affects certain performances of electronic portable devices, such as battery life and so on. For this reason, the conversion efficiency is often used as one of the important indicators to measure the performance of the DC-DC converter. [0003] Power tube segment drive technology is an important means to effectively ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02M1/08
Inventor 罗萍白春蕾付松林周才强陈剑洛周彪
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com