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Switching regulator with adaptive pwm/pfm modulator

一种开关稳压器、开关稳压的技术，应用在控制/调节系统、仪器、调节电变量等方向，能够解决性价比低、设计和制造过程复杂等问题，达到提高工作效率、简化系统设计、降低成本的效果

Active Publication Date: 2014-09-17
ALPHA & OMEGA SEMICON INT LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Manufacturers of electronic systems must develop solutions for various DC-DC converters, which complicates the design and manufacturing process and is cost-effective

Method used

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  • Switching regulator with adaptive pwm/pfm modulator
  • Switching regulator with adaptive pwm/pfm modulator
  • Switching regulator with adaptive pwm/pfm modulator

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Embodiment Construction

[0047] The invention can be implemented in various ways, including as a process; an apparatus; a system; and / or a composition of matter. In this specification, these implementation manners or any other manners that may be adopted by the present invention may be referred to as technologies. In general, the order of the process steps described can be varied within the scope of the invention.

[0048] The detailed description of one or more embodiments of the invention and the accompanying drawings explain the principles of the invention. Although, the present invention is presented with these embodiments, the scope of the present invention is not limited to any embodiment. The scope of the invention is limited only by the claims and the invention embraces various alternatives, modifications and equivalents. In the following description, various specific details are set forth in order to provide a thorough understanding of the invention. These details are provided for illustra...

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Abstract

A switching regulator controller for a buck switching regulator incorporates a multi-mode adaptive modulator configured to automatically select between a first operation mode and a second operation mode as a function of the output voltage being generated. In one embodiment, the switching regulator controller compares the output voltage to a comparator reference voltage and is configured to operate in a selected operation mode based on the output voltage. In this manner, a single switching regulator controller can be used in multiple instances of an electronic system to supply circuitry that may have different operational requirements. In one embodiment, the switching regulator controller is configured to operation in a PWM / PFM mode and a PWM mode as a function of the output voltage, which indicates the circuit application to which the switch regulator controller is used to supply.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a switching regulator with an adaptive PWM / PFM modulator. Background technique [0002] Many consumer electronics products, such as TV set-top boxes and remote control devices, incorporate integrated circuits like electronic systems. These electronic systems typically include integrated circuits forming the core digital logic and integrated circuits forming the input / output (I / O) interface circuits. Traditional electronic systems utilize multiple DC-DC converters to convert the main bus voltage from the mains supply system to the voltage or voltages required to drive these integrated circuits. [0003] A switch-mode power supply or switching regulator, also known as a DC-DC converter, is used to convert an input voltage source to a desired output voltage at a voltage level suitable for integrated circuits in electronic systems. For example, the 12V voltage source of the elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/157H02M1/00
CPCG05F1/595H02M3/156H02M2001/008H02M1/008
Inventor 韦志南张之也张艾伦
Owner ALPHA & OMEGA SEMICON INT LP
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