CN103513744A

CN103513744A - Energy-saving circuit

Info

Publication number: CN103513744A
Application number: CN201210197901.5A
Authority: CN
Inventors: 周海清
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2012-06-15
Filing date: 2012-06-15
Publication date: 2014-01-15
Also published as: TW201351123A

Abstract

The invention provides an energy-saving circuit. The energy-saving circuit is arranged in computer and comprises a voltage control end, a first transistor, a second transistor, a filed effect tube and a voltage output end, wherein a base electrode of the first transistor is connected to the voltage control end through a resistor, an emitting electrode of the first transistor is grounded, a collector electrode of the first transistor is connected to a first power source through a resistor, a base electrode of the second transistor is connected to the collector electrode of the first transistor, an emitting electrode of the second transistor is grounded, a collector electrode of the second transistor is connected to the first power source through a resistor, a grid electrode of the field effect tube is connected to the collector electrode of the second transistor, a drain electrode of the field effect tube is connected to a second power source, and a source electrode of the field effect tube is connected to the voltage output end. Electronic components relating to the energy-saving circuit are few, the circuit is simple, cost of the computer can be effectively reduced, overmuch space will not be occupied in the computer, and the circuit is convenient for a user to use in daily life.

Description

Energy-saving circuit

Technical field

The present invention relates to a kind of energy-saving circuit, relate in particular to a kind of energy-saving circuit of realizing computer deep sleep (S5+).

Background technology

According to ACPI (Advanced Configuration and Power Interface, ACPI) standard, computer power management system can be divided into S0-S5 by the duty of computer, and the implication of their representatives is respectively:

S0: computer normal operation, all hardware equipment is the state in opening or working all;

S1: also referred to as POS(Power on Suspend, CPU quits work), other hardware device still works;

S2: CPU is closed, but remaining hardware device still turns round;

S3: be commonly referred to STR(Suspend to RAM, suspend to internal memory), will after operating data write memory, close hard disk;

S4: also referred to as STD(Suspend to Disk, suspend to hard disk), memory information writes hard disk, and then all parts quit work;

S5: all hardware equipment (comprising power supply) is all closed, and computer is in off-mode.

Wherein, when computer is during in S5 state, because the chipset on computer main board is still in running order, may be unfavorable for the saving of the computer energy and the reduction of power consumption.Therefore, for addressing the above problem, the duty of computer has increased a new state, i.e. deep sleep (S5+).Yet existing comparatively complicated for the general circuit of energy-saving circuit of realizing S5+ state, the element that relates to is more and take up room greatly, is unfavorable for the reduction of computer cost.

Summary of the invention

In view of this, be necessary to provide a kind of simple in structure, cost is lower and can realize the energy-saving circuit of S5+ state.

A kind of energy-saving circuit, be arranged in a computer, comprise voltage controling end, the first transistor, transistor seconds, field effect transistor and voltage output end, the base stage of this first transistor is connected to this voltage controling end by a resistance, the grounded emitter of this first transistor, collector is connected to one first power supply by a resistance, the base stage of this transistor seconds is connected to the collector of this first transistor, the grounded emitter of this transistor seconds, collector is connected to this first power supply by a resistance, the grid of this field effect transistor is connected to the collector of this transistor seconds, the drain electrode of this field effect transistor is connected to a second source, the source electrode of this field effect transistor is connected to this voltage output end.

The electronic component that above-mentioned energy-saving circuit relates to is less, and circuit is simple, can effectively reduce the cost of this computer, and does not take the inner too much space of computer, facilitates user's routine use.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of the energy-saving circuit of better embodiment of the present invention.

Main element symbol description

Energy-saving circuit	100
		Voltage controling end	SLP_SUS#
The first transistor	Q1
		Transistor seconds	Q2
Field effect transistor	M1
		Voltage output end	3V_S5
Resistance	R1-R3
		The first power supply	5VSB
Second source	3V_DUAL
		Delay circuit	101
Time delay resistance	R4
		Electric capacity	C1

Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.

Embodiment

Refer to Fig. 1, better embodiment of the present invention provides a kind of energy-saving circuit 100, is applied to a computer (not shown).This energy-saving circuit 100 comprises voltage controling end SLP_SUS#, the first transistor Q1, transistor seconds Q2, field effect transistor M1 and voltage output end 3V_S5.

This voltage controling end SLP_SUS# is connected to the control chip in this computer, for example platform is controlled hub (Platform Controller Hub, PCH) (not shown), in order to when described computer enters S5+ state, under the control of this control chip, export one first control signal (for example low level signal).Otherwise, when described computer exits this S5+ state, for example, in order to export second control signal (high level signal) contrary with described the first control signal under the control of this control chip.

This first transistor Q1 is the triode of a NPN type.The base stage of this first transistor Q1 is connected to this voltage controling end SLP_SUS# by a resistance R 1.The grounded emitter of this first transistor Q1, collector is connected to one first power supply 5VSB by a resistance R 2.This transistor seconds Q2 is the triode of a NPN type.The base stage of this transistor seconds Q2 is connected to the collector of this first transistor Q1.The grounded emitter of this transistor seconds Q2, collector is connected to this first power supply 5VSB by a resistance R 3.The grid of this field effect transistor M1 is connected to the collector of this transistor seconds Q2, and the drain electrode of this field effect transistor M2 is connected to a second source 3V_DUAL.The source electrode of this field effect transistor M2 is connected to this voltage output end 3V_S5.

Chipset on this voltage output end 3V_S5 and computer main board, for example electric connection such as PCH, peripheral element extension interface (Peripheral Component Interconnection, PCI), is used to this chipset that electric energy is provided.Usually, when described computer is during in S5+ state, this voltage output end 3V_S5 exports a low level, to close the power supply of this chipset, described chipset is quit work, and then realize energy-conservation.And when described computer exits this S5+ state, this voltage output end 3V_S5 exports a high level, and then for this chipset provides electric energy, so that described chipset continues normal operation.

The principle of work of the energy-saving circuit 100 in preferred embodiment of the present invention will be introduced in detail below.

First, according to above-mentioned principle, when described computer enters this S5+ state, this voltage controling end SLP_SUS# will export this first control signal (being low level signal).This first control signal makes described the first transistor Q1 cut-off, and then makes the base stage of described transistor seconds Q2 because be connected to this first power supply 5VSB conducting by this resistance R 1.Now, the grid of this field effect transistor M1 ends because of the transistor seconds Q2 ground connection by this conducting, and then makes this voltage output end 3V_S5 export a low level, so to close the power supply of this chipset, described chipset is quit work, and then realize energy-conservation.

Accordingly, when described computer exits this S5+ state, this voltage controling end SLP_SUS# exports this second control signal (being high level signal).This second control signal makes described the first transistor Q1 conducting, and then the base stage that makes described transistor seconds Q2 is ended because of the first transistor Q1 ground connection by this conducting.Now, the grid of this field effect transistor M1 is because being directly connected to this first power supply 5VSB conducting by this resistance R 2, and then make described voltage output end 3V_S5 export a high level because the field effect transistor M1 by this conducting is connected to this second source 3V_DUAL, think that this chipset provides electric energy, make described chipset continue normal operation.

Be appreciated that, in other embodiments of the present invention, this energy-saving circuit 100 also comprises a delay circuit 101, this delay circuit 101 is connected between the collector of described transistor seconds Q2 and the grid of field effect transistor M1, in order to avoid field effect transistor M1 conducting too fast, make described voltage output end 3V_S5 export larger immediate current to this chipset, and then avoid described second source 3V_DUAL generation compared with large pressure drop, to make other equipment that are electrically connected with described second source 3V_DUAL to work.Particularly, this delay circuit 101 comprises time delay resistance R4 and capacitor C 1, and described time delay resistance R4 one end is connected to the collector of this transistor seconds Q2, and the other end is by this capacitor C 1 ground connection.So, when described computer exits this S5+ state, the second control signal of this voltage controling end SLP_SUS# output will be controlled this first transistor Q1 conducting, and transistor seconds Q2 cut-off.And the voltage of this first power supply 5V_SB output will first charge to capacitor C 1 by time delay resistance R4, and only have when the voltage at described capacitor C 1 two ends reaches the forward voltage of described field effect transistor M1, just control described field effect transistor M1 conducting, and then prevent that described field effect transistor M1 conducting is too fast.

Obviously, the electronic component that energy-saving circuit 100 of the present invention relates to is less, and circuit is simple, can effectively reduce the cost of this computer, and does not take the inner too much space of computer, facilitates user's routine use.

Claims

1. an energy-saving circuit, be arranged in a computer, comprise voltage controling end, the first transistor, transistor seconds, field effect transistor and voltage output end, the base stage of this first transistor is connected to this voltage controling end by a resistance, the grounded emitter of this first transistor, collector is connected to one first power supply by a resistance, the base stage of this transistor seconds is connected to the collector of this first transistor, the grounded emitter of this transistor seconds, collector is connected to this first power supply by a resistance, the grid of this field effect transistor is connected to the collector of this transistor seconds, the drain electrode of this field effect transistor is connected to a second source, the source electrode of this field effect transistor is connected to this voltage output end.

2. energy-saving circuit as claimed in claim 1, it is characterized in that: the chipset on this voltage output end and described computer main board is electrically connected, when described computer enters a deep sleep (S5+) state, this voltage controling end output one first control signal, described the first transistor ends and described transistor seconds conducting, this field effect transistor cut-off, and then make this voltage output end export a low level, to close the power supply of this chipset.

3. energy-saving circuit as claimed in claim 2, it is characterized in that: when described computer exits this S5+ state, this voltage controling end output one second control signal, this second control signal makes described the first transistor conducting and the cut-off of described transistor seconds, this field effect transistor conducting, and then make described voltage output end export a high level, think that this chipset provides electric energy.

4. energy-saving circuit as claimed in claim 3, is characterized in that: described voltage controling end is connected to the control chip in described computer, in order to export described the first control signal and described the second control signal under the control of described control chip.

5. energy-saving circuit as claimed in claim 1, it is characterized in that: described energy-saving circuit also comprises a delay circuit, this delay circuit is connected between the collector of described transistor seconds and the grid of field effect transistor, in order to avoid field effect transistor conducting too fast, make the larger immediate current of described voltage output end output, and then avoid described second source generation compared with large pressure drop, to make other equipment that are electrically connected with described second source to work.

6. energy-saving circuit as claimed in claim 5, is characterized in that: described delay circuit comprises time delay resistance and electric capacity, and one end of described time delay resistance is connected to the collector of this transistor seconds, and the other end is by this capacity earth.

7. energy-saving circuit as claimed in claim 1, is characterized in that: this first transistor is the triode of a NPN type.

8. energy-saving circuit as claimed in claim 1, is characterized in that: this transistor seconds is the triode of a NPN type.