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Switching current integrator for high power density buck switching converter

A switching converter, high power density technology, applied in the direction of electronic switches, high-efficiency power electronic conversion, electrical components, etc., can solve problems such as poor transient response, achieve the effect of reducing chip area and improving low-frequency gain

Active Publication Date: 2021-06-25
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention proposes a switching current integrator circuit, which has the characteristics of simple structure, introducing adaptive zero point and dynamically compensating with the switching frequency so as to improve the high-frequency transient characteristics, and solves the problem that the traditional error amplifier needs to introduce off-chip compensation and the bandwidth of the Buck converter Fixed poor transient response at high frequencies

Method used

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  • Switching current integrator for high power density buck switching converter
  • Switching current integrator for high power density buck switching converter
  • Switching current integrator for high power density buck switching converter

Examples

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Embodiment Construction

[0040] The specific embodiment of the present invention is described below in conjunction with accompanying drawing:

[0041] The specific circuit of the switching current integrator used in the high power density step-down switching converter of the present invention is as follows image 3 shown, including the first capacitor C 1 , the second capacitance C 2 , the third capacitor C 3 , the fourth capacitor C 4 , the first transmission gate TG 1 , the second transmission gate TG 2 , the third transmission gate TG 3 , the fourth transmission gate TG 4 , the first NMOS transistor MN1, the second NMOS transistor MN2, the third NMOS transistor MN3, the fourth NMOS transistor MN4, the fifth NMOS transistor MN5, the sixth NMOS transistor MN6, the seventh NMOS transistor MN7, the eighth NMOS transistor MN8, the The ninth NMOS transistor MN9, the tenth NMOS transistor MN10, the eleventh NMOS transistor MN11, the twelfth NMOS transistor MN12, the thirteenth NMOS transistor MN13,...

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Abstract

The invention discloses a switching current integrator circuit for a high-power-density step-down switching converter. The switching current integrator circuit comprises four capacitors, four transmission gates, fourteen NMOS tubes, fifteen PMOS tubes and a current source. The components are mutually connected to form a switching current circuit, so a transfer function is equivalent to an integrator, low-frequency gain is improved, a self-adaptive zero point is introduced to enable a Buck loop to keep stable under different switching frequencies, the chip area is reduced, and the problems that off-chip compensation needs to be introduced into a traditional error amplifier, and transient response is poor when the bandwidth of a Buck converter is fixed at high frequency are solved.

Description

technical field [0001] The invention belongs to the field of integrated circuits and power converters, and in particular relates to a switching current integrator applied to high power density step-down switching converters. Background technique [0002] As a part of PMIC, DC-DC converter has been widely used in the fields of portable electronic products, computers, communications and automotive electronics due to its high conversion efficiency. In recent years, miniaturized, lightweight, and portable electronic products are more popular with the public. However, there is a very important problem among these electronic devices: low battery utilization rate and poor battery life. In order to solve this problem, DC-DC converter chips with high power density have naturally become the direction of future development. Buck DC-DC converter with constant on-time (COT) structure is the main research hotspot in recent years. It has the characteristics of fast response and high effi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/687
CPCH03K17/687Y02B70/10
Inventor 甄少伟易子皓罗攀方舟张波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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