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Intelligent switching controller and power conversion circuits and methods

A technology of power conversion and circuit, which is applied in the direction of output power conversion device, conversion of DC power input to DC power output, control/regulation system, etc. It can solve the problems of increasing cost, occupying external space by external switches, increasing system cost, etc.

Inactive Publication Date: 2013-12-25
MARVELL ASIA PTE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Analog circuitry typically occupies a larger area of ​​silicon, which increases cost
Additionally, external switches take up external space and add to system cost

Method used

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  • Intelligent switching controller and power conversion circuits and methods
  • Intelligent switching controller and power conversion circuits and methods
  • Intelligent switching controller and power conversion circuits and methods

Examples

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Embodiment Construction

[0038] Techniques for power conversion are described here. In the following description, for purposes of explanation, numerous examples and specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention as defined by the claims includes some or all of the features in these examples alone or in combination with the features described below, and may also include the features and concepts herein Modifications and equivalent features and concepts.

[0039] figure 1 A power conversion circuit 100 according to one embodiment of the invention is shown. The power conversion circuit 100 includes an integrated circuit (IC) 101 including a controller 102 and a MOS switch 103 . For example, IC 101 is a three-pad IC and may be in a 3-pin package. The MOS switch 103 can be external or integrated inside the controller 102 on the same silicon chip. Circuit 100 also includes inducto...

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Abstract

A controller for a power conversion circuit that includes an inductor, a diode, and a switch. The controller includes a counter configured to determine, based on a first voltage input to the inductor, an on-time of the diode. The on-time of the diode corresponds to an amount of time that the diode is conducting a first current to a load of the power conversion circuit. A current estimation circuit configured to estimate, based on the on-time of the diode and an on-time of the switch, an output current of the power conversion circuit. The on-time of the switch corresponds to an amount of time that the switch is conducting a second current. A pulse width modulator is configured to provide, based on the estimated output current, a gate drive signal to the switch. The gate drive signal selectively transitions the switch between an on state and an off state.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority to US Provisional Application No. 61 / 096,159, filed September 11, 2008, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to switching power conversion circuits. Background technique [0004] Electronic devices require voltage and current to function. In general, different electronic devices and systems have different voltage and current operating requirements. For example, some devices require a 3.3 volt supply capable of delivering up to 100mA, while others require a 5 volt supply capable of delivering 1A or more. Power is often provided by a wall socket (socket) supplying a standard voltage and current or by a battery. Wall outlets typically provide 110V alternating current (AC) power, while batteries provide a wide range of voltages as direct current (DC) power. Therefore, to bridge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/00
CPCG05F1/565H02M3/156H05B45/325H05B45/3725H05B45/375H05B45/38H02M1/0009Y02B20/30
Inventor 张万峰林建青戴绍安
Owner MARVELL ASIA PTE LTD
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