Method using PWM manner to control USB PD system to output voltage

A technology of output voltage and mode control, which is applied in the direction of control/regulation system, adjustment of electric variables, instruments, etc. It can solve the problems of increased PCB area, unfavorable product upgrades, and many control signals, and achieve the effect of saving area

Inactive Publication Date: 2017-04-26
威海优微科技有限公司
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Problems solved by technology

[0005] The adjustment of the existing power supply voltage is done by switching between different resistor networks, which requires many control signals, and the PCB needs to reserve control devices such as MOSFETs at the same time, resulting in an increase in the PCB area. When it is necessary to support the original design When more voltage is output, the hardware must be redesigned, which is not conducive to product upgrades

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  • Method using PWM manner to control USB PD system to output voltage
  • Method using PWM manner to control USB PD system to output voltage

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] A method of controlling the output voltage of a USB PD system by means of PWM in the present invention is characterized in that: electronic product system #1 and system #2 adopt USB Type-C interface and support PD protocol, electronic product system #1 and system #2 There is a power control system inside, and the power control system is composed of a PWM generator, a filter network and a DC / DC chip.

[0019] Further, the system #1 supplies power to the system #2 through the VBUS, and the system # outputs 5V voltage by default, and the system #1 and the system #2 negotiate a new output voltage through the PD protocol; the system #1 changes the frequency output of the PWM signal to adjust the DC / DC feedback terminal voltage to output a new VBUS voltage value.

[0020] Further, the PWM generator can be adjusted by software to generate a correspond...

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Abstract

The invention discloses methods for controlling a USB PD system to output voltage and particularly relates to a method using as PWM manner to control the USB PD system to output the voltage. The method is characterized in that a first electronic product system and a second electronic product system adopt USB Type-C interfaces and support PD protocols, the first electronic product system and the second electronic product system are provided with power control systems inside, and each power control system comprises a PWM generator, a filter network and a DC / DC chip. The method has the advantages that different voltage output can be controlled by the output of one PWM signal, more control signals are not needed, more switching-controlling devices such as MOSFET are not needed, the area of a PCB is reduced greatly, voltage output can be regulated only by regulating the frequency of the PWM signal, and more voltage output can be supported by software-controlled upgrading.

Description

[0001] (1) Technical field [0002] The present invention relates to a method for controlling the output voltage of a USB PD system, in particular to a method for controlling the output voltage of the USB PD system in a PWM manner. [0003] (2) Background technology [0004] In the prior art, the USB Type-C interface is gradually adopted by more and more consumer electronic devices due to its small size, support for forward and reverse insertion, high-speed data transmission, and power delivery of up to 100W. The PD technology of the interface can allow automatic negotiation of power supply voltage and current, and at the same time provide switching of USB data roles (DFP / UFP), power roles (SRC / SNK), etc. [0005] The adjustment of the existing power supply voltage is done by switching between different resistor networks, which requires many control signals, and the PCB needs to reserve control devices such as MOSFETs at the same time, resulting in an increase in the PCB area. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/561
Inventor 任长虹黄勇华
Owner 威海优微科技有限公司
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