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Variable switched DC-to-DC voltage converter using pulse skipping mode and frequency modulation

A voltage converter, DC-DC technology, applied in the direction of pulse frequency/rate modulation, output power conversion device, conversion equipment without intermediate conversion to AC, etc., can solve the problems that affect the operation of mobile phones, disadvantages, etc.

Active Publication Date: 2017-04-05
SKYWORKS SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PWM based DC-DC converters can generate a relatively large spectrum of spurious output signals which can adversely affect the operation of mobile phones or other frequency sensitive devices
Filters with relatively large capacitance and / or inductance can be included in PWM-based DC-DC converters to minimize these spurious signals, however, large The filter capacitors and / or inductors

Method used

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  • Variable switched DC-to-DC voltage converter using pulse skipping mode and frequency modulation
  • Variable switched DC-to-DC voltage converter using pulse skipping mode and frequency modulation
  • Variable switched DC-to-DC voltage converter using pulse skipping mode and frequency modulation

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Embodiment Construction

[0058] Aspects of the disclosure that are generally described relate to DC-DC voltage conversion. More specifically, some embodiments relate to variable switched capacitor DC-DC converters. Electronic systems, such as power amplifier systems, can operate more efficiently and / or consume less power using the voltage conversion systems, apparatus, and methods described herein. For example, power amplifier biasing can be made more efficient. Switched capacitor architectures can utilize feedback to dynamically select switching modes and generate control voltages. Switch size and / or switching frequency can be adjusted dynamically.

[0059] A DC-DC converter using a pulse width modulation (PWM) architecture can generate an undesired output spectrum that includes noise. In such PWM architectures, the output noise spectrum may require LC filters that include large inductive elements that are expensive to implement and can radiate energy. A switched capacitor architecture can elimin...

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Abstract

A voltage converter can be switched among two or more modes to produce an output voltage tracking a reference voltage that can be of an intermediate level between discrete levels corresponding to the modes. One or more voltages generated from a power supply voltage, such as a battery voltage, can be compared with the reference voltage to determine whether to adjust the mode. The reference voltage can be independent of the power supply voltage. Further, the voltage converter may implement frequency modulation and a pulse skipping mode to improve the efficiency of switching operational states of the voltage converter.

Description

technical field [0001] The disclosed technology relates to electronic systems, and more particularly to DC-to-DC voltage converters. Background technique [0002] One type of device that converts one direct current ("DC") voltage level to another DC voltage level may be referred to as a DC-to-DC converter (DC-DC converter). DC-DC converters can be included in battery powered devices such as mobile phones, laptop computers etc. where the various subsystems of the device require some discrete voltage levels. In some types of devices, such as mobile phones operating in multiple different modes, it may be desirable to provide certain elements, such as power amplifiers, with supply voltages at levels that are more efficient for the mode of operation, rather than wasting power and Thus draining the battery prematurely. In such devices, it may be desirable to employ a DC-DC converter that can generate multiple discrete voltage levels. [0003] Some example DC-DC converters inclu...

Claims

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Application Information

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IPC IPC(8): H02M3/10H02M3/155
CPCH02M3/10H02M3/155H02M3/1555H02M3/07H03K7/06H03K17/005
Inventor 刘辉T.J.曼希姆D.S.里普利
Owner SKYWORKS SOLUTIONS INC