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Block power tube circuit and mtehod for realizing same

A technology of power tube and block, which is applied in the direction of programmable logic circuit device, output power conversion device, logic circuit connection/interface layout, etc., can solve the problems of deteriorating output ripple and limited improvement of efficiency, etc., and achieve the reduction of conduction pass loss, improve efficiency, and reduce loss

Active Publication Date: 2012-05-02
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the Pulse Skipping mode and Burst mode can improve the efficiency of the switching power supply at light load by reducing the switching frequency of the power tube, the fixed large-sized power tube makes the efficiency improvement quite limited; at the same time, this method of reducing the switching frequency of the power tube will cause Significantly worsens output ripple

Method used

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  • Block power tube circuit and mtehod for realizing same
  • Block power tube circuit and mtehod for realizing same
  • Block power tube circuit and mtehod for realizing same

Examples

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Embodiment 1

[0026] This embodiment provides a block power tube circuit, which is used to logically control the voltage adjustment signal of the switching power supply, so as to realize the power supply voltage required by the processor and memory connected to the switching power supply, and manage the power supply voltage in the current switching power supply. The switching state of the power tube, such as figure 1 As shown, the circuit includes a control circuit 11, a drive circuit 12 and a block power tube group 13, wherein:

[0027] The control circuit 11 is used to adjust the square-wave duty ratio of the PWM signal according to the voltage adjustment signal, generate a PWMP signal, a PWMN signal and a control signal m, and the control signal m is used to manage the number of power tube pairs turned on and then adjust the switch The efficiency of the power supply, the PWMP signal and the PWMN signal are used to provide the power tube state control signal for the drive circuit 12, wher...

Embodiment 2

[0032] This embodiment provides a block power tube circuit, which is used to logically control the voltage adjustment signal of the switching power supply, so as to realize the power supply voltage required by the processor and memory connected to the switching power supply, and manage the power supply voltage in the current switching power supply. The switching state of the power tube, such as figure 2 As shown, the circuit includes a control circuit 11, a drive circuit 12 and a block power tube group 13, wherein:

[0033]The control circuit 11 is used to adjust the square-wave duty ratio of the PWM signal according to the voltage adjustment signal, generate a PWMP signal, a PWMN signal and a control signal m, and the control signal m is used to manage the number of power tube pairs turned on and then adjust the switch The efficiency of the power supply, the PWMP signal and the PWMN signal are used to provide the power tube state control signal for the drive circuit 12, wher...

Embodiment 3

[0053] This embodiment provides a method for implementing a block power tube circuit, such as Image 6 As shown, the method includes:

[0054] 601. Generate a voltage adjustment signal according to the power supply voltage required by the processor and memory connected to the switching power supply, use the PWM signal and the voltage adjustment signal to generate a PWMN signal, a PWMP signal, and a control signal m through the control circuit, and pass The control signal m manages the number of power transistor pairs turned on.

[0055] 602. The PWMP signal and the PWMN signal generate drive signals PG and NG through the drive circuit, and the PG signal controls the switching state of the PMOS power transistor in the power transistor pair, and the NG signal controls the switching state of the NMOS power transistor in the power transistor pair.

[0056] Further, the block power tube circuit also includes a dynamic dead zone control circuit, and the method further includes:

...

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Abstract

The embodiment of the invention discloses a block power tube circuit and a method for realizing the same. The block power tube circuit comprises a control circuit used for adjusting the square wave duty ratio of a PWM signal according to a voltage adjustment signal to generate a PWMP signal, a PWMN signal and a control signal m; a drive circuit of which a PWMP signal end and a PWMN signal end receive the PWMP signal and PWMN signal sent by the control circuit to generate a drive signal PG and a drive signal NG to control the power tube to control the opening and closing states of a PMOS power tube and an NMOS power tube; a block power tube group comprising at least one power tube pair, wherein, each power tube pair comprises a PMOS power tube and an NMOS power tube, the input ends of the PMOS power tube and the NMOS power tube receive the PG signal and NG signal sent by the drive circuit respectively. The invention is suitable for being used in a switch power supply.

Description

technical field [0001] The invention relates to the technical field of switching power supplies, in particular to a block power tube circuit and its realization method. Background technique [0002] The switching power supply is an important module in the power management unit, which can efficiently supply battery energy to the processor core, I / O (Input / Output, input / output), memory and other components. Efficiency is an important indicator of a switching power supply, and the main factors affecting it are the conduction loss, dynamic loss and switching loss of the power tube in the switching power supply. Generally speaking, when the load connected to the switching power supply is a heavy load, the conduction loss has a great influence on the efficiency; when the load connected to the switching power supply is a light load, the dynamic loss has a great influence on the efficiency; The switching loss has a great influence on the efficiency; the conduction loss has a great ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155
CPCH02M3/00H03K7/08H03K19/017581H02M3/155
Inventor 余凯谢强
Owner HUAWEI TECH CO LTD
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