A dc-dc converter

A DC-DC and converter technology, applied in the field of DC-DC converters, can solve problems such as limiting the output voltage drop speed, and achieve the effects of low power consumption, easy implementation, and DVS speed improvement

Inactive Publication Date: 2015-08-19
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 inductance drop speed is limited by the inductance
Larger capacitance and inductance can get smaller ripple voltage, which will limit the drop rate of output voltage

Method used

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing, describe technical scheme of the present invention in detail:

[0023] Such as figure 1 As mentioned above, it is a basic frame structure of a traditional DC-DC converter. right figure 1 The schematic diagram of the DC-DC converter for output voltage regulation is shown in figure 2 shown. When the DC-DC converter adjusts the output voltage rise process, the reference voltage rises rapidly, so that the PWM comparator outputs a square wave signal with a large duty cycle, and the power transistor MP is turned on for a long time through the drive circuit, causing the inductor current to rise rapidly. After the inductor current exceeds the value set by the current limiting module, the inductor current changes around the current limiting value. In this process, the inductor current charges the capacitor with the maximum current, so that the output voltage rises rapidly until the output voltage is equal to the reference volt...

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PUM

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Abstract

The invention relates to the technology of a power source and an integrated circuit, in particular to a DC-DC converter with the output voltages capable of being adjusted quickly. The DC-DC converter comprises a driving circuit, a PMOS tube MP, an NMOS tube MN, a PWM comparator, an EA amplifier, an inductor L, a capacitor C, a resistor R and a power source Vin. The DC-DC converter is characterized in that a calculating amplifier is further included, the driving circuit, the PMOS tube MP, the NMOS tube MN, the PWM comparator, the EA amplifier, the inductor L, the capacitor C, the resistor R and the power source Vin form a traditional DC-DC converter, and the positive input end and the output end of the calculating amplifier are connected to be used as one end, connected to the capacitor C, of a bumper. The DC-DC converter has the advantages of being simple in structure, easy to achieve, low in power consumption, and capable of achieving quick adjusting of the output voltages of the DC-DC converter only by small domain area. The DC-DC converter is particularly suitable for DC-DC converters.

Description

technical field [0001] The invention relates to power supply and integrated circuit technology, in particular to a DC-DC converter whose output voltage can be quickly adjusted. Background technique [0002] In recent years, with the improvement of people's consumption level, portable electronic devices such as MP3 and mobile phones have become more and more popular. DC-DC converters can guarantee high output accuracy, low adjustment rate and high Efficiency and other advantages are more and more popular and concerned by people. Through people's efforts, the conversion efficiency of commercial DC-DC converters can reach more than 95%. Purely high conversion efficiency is no longer the goal that people pursue, but lies in the optimization and reduction of power consumption at the system level. Since the power consumption is proportional to the square of the voltage, the dynamic voltage regulation (Dynamic Voltage Scaling, DVS) technology used in the SoC chip has a significan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/156
Inventor 甄少伟王俊喜刘雨石耿煜罗萍张波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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