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Block power tube circuit and method for realizing same

A power tube and block technology, which is applied to programmable logic circuit devices, output power conversion devices, logic circuit connection/interface layout, etc. The effect of reducing conduction loss and reducing loss

Active Publication Date: 2015-01-07
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 method for realizing same
  • Block power tube circuit and method for realizing same
  • Block power tube circuit and method for realizing same

Examples

Experimental program
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Effect test

Embodiment 1

[0026] This embodiment provides a block power tube circuit for logically controlling the voltage regulation signal of the switching power supply, so as to realize the management of the current switching power supply according to the power supply voltage required by the processor and memory connected to the 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 cycle of the PWM signal according to the voltage adjustment signal to generate a PWMP signal, a PWMN signal, and a control signal m. The control signal m is used to manage the number of power tube pairs turned on to 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 driving circuit 12, wherein the PWMP signal and the ...

Embodiment 2

[0032] This embodiment provides a block power tube circuit for logically controlling the voltage regulation signal of the switching power supply, so as to realize the management of the current switching power supply according to the power supply voltage required by the processor and memory connected to the 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 cycle of the PWM signal according to the voltage adjustment signal to generate a PWMP signal, a PWMN signal, and a control signal m. The control signal m is used to manage the number of power tube pairs turned on to 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 driving circuit 12, wherein the PWMP signal and the...

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. A voltage regulation signal is generated according to the power supply voltage required by the processor and the memory to which the switching power supply is connected, and the PWM signal and the voltage regulation signal are used to generate the PWMN signal, the PWMP signal, and the control signal m through the control circuit. The control signal m manages the number of power tube pairs turned on.

[0055] 602. The PWMP signal and PWMN signal generate driving signals PG and NG through the driving circuit, the switching state of the PMOS power tube in the power tube pair is controlled by the PG signal, and the switching state of the NMOS power tube in the power tube pair is controlled by the NG signal.

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

[...

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Abstract

Disclosed are a partitioned power tube circuit and a method for implementing the same. The partitioned power tube circuit includes: a control circuit used for adjusting the duty ratio of a square wave of a PWM signal according to a voltage-adjusting signal, and generating a PWMP signal, a PWMN signal and a control signal m; a driver circuit used for generating a driving signal PG and a driving signal NG according to the PWMP signal and the PWMN signal, and controlling the switching status of the power tube towards a central PMOS power tube and an NMOS power tube by means of the PG signal and the NG signal, with a PWMP signal end and a PWMN signal end of the driver circuit receiving the PWMP signal and the PWMN signal sent by the control circuit; a partitioned power tube group including at least one pair of power tubes which include a PMOS power tube and an NMOS power tube, and the input ends of the PMOS power tube and the NMOS power tube respectively receive the PG signal and the NG signal sent by the driver circuit. The present invention is suitable for a switch type 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 an implementation method thereof. Background technique [0002] 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), memory and other components. Efficiency is an important indicator of a switching power supply. 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 of the switching power supply is connected to a heavy load, the conduction loss has a large impact on the efficiency; when the load of the switching power supply is connected to a light load, the dynamic loss has a large impact on the efficiency; the operating frequency of the switching power supply is at high frequency The switching loss has a great inf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155
CPCH03K19/017581
Inventor 余凯谢强
Owner HUAWEI TECH CO LTD