CN105652995A - Mainboard power supply circuit - Google Patents

Mainboard power supply circuit Download PDF

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Publication number
CN105652995A
CN105652995A CN201410639009.7A CN201410639009A CN105652995A CN 105652995 A CN105652995 A CN 105652995A CN 201410639009 A CN201410639009 A CN 201410639009A CN 105652995 A CN105652995 A CN 105652995A
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CN
China
Prior art keywords
transistor
mainboard
power supply
conducting
circuit
Prior art date
Application number
CN201410639009.7A
Other languages
Chinese (zh)
Inventor
黄扬轩
Original Assignee
鸿富锦精密工业(武汉)有限公司
鸿海精密工业股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 鸿富锦精密工业(武汉)有限公司, 鸿海精密工业股份有限公司 filed Critical 鸿富锦精密工业(武汉)有限公司
Priority to CN201410639009.7A priority Critical patent/CN105652995A/en
Publication of CN105652995A publication Critical patent/CN105652995A/en

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Abstract

Provided is a mainboard power supply circuit, comprising a mainboard connected with a power supply, and a control circuit connected with the mainboard. The power supply is used to supply power for a notebook computer and charge a battery. The power supply supplies power for the mainboard through the control circuit. The mainboard is used to cut off the control circuit when detecting the notebook computer is in a standby state, so that the power supply does not supply power for the mainboard. The mainboard is also used to connect the control circuit when detecting the battery needs charging, so that the power supply supplies power for the mainboard and charges the battery.

Description

Feed circuit of mainboard

Technical field

The present invention relates to a kind of feed circuit of mainboard.

Background technology

Along with the develop rapidly of notebook computer, the performance of notebook computer is more and more powerful, and the power consumption of notebook computer is also increasing. Generally, when notebook computer is in sleep (standby, S3), dormancy (hibernation, S4) and cuts out standby states such as (poweroff, S5), major part hardware all can enter closing condition. But, still need the needs considering that battery has charging in the standby state. Therefore, in standby state and under not needing the situation of charging, cause the unnecessary energy consumption of most time. Battery charging action controls by embedded controller (embeddedcontroller, EC). EC is via whether the existence constantly reading battery state and power adaptation device (adaptor) determines whether to be charged. In addition, no matter whether power adaptation device (adaptor) and battery are deposited in systems in which simultaneously, or individually existing, in the standby state, EC can be in wake-up states (wakeup) set time, confirms whether power switch is opened. Therefore, when standby state and battery do not need charging, notebook computer still can consume certain power consumption.

Summary of the invention

In view of above content, it is necessary to provide a kind of notebook computer to reduce the feed circuit of mainboard of power consumption when standby state.

A kind of feed circuit of mainboard, comprise the mainboard for connecting power supply and connect the pilot circuit of described mainboard, described power supply is for charging to notebook computer power supply and to battery, described power supply gives described main board power supply by described pilot circuit, described mainboard is in order to detecting that described notebook computer disconnects described pilot circuit when being in standby state, thus described power supply is not powered to described mainboard, described mainboard is also in order to the pilot circuit described in conducting when detecting that described battery needs charging, thus described power supply can be given described main board power supply and charge to described battery.

Preferably, described pilot circuit comprises first crystal pipe and two-transistor, described first crystal pipe connects described power supply and connects described mainboard, described two-transistor is connected between described mainboard and described first crystal pipe, described mainboard is two-transistor described in conducting when detecting that described battery needs charging, described first crystal pipe conducting after described two-transistor conducting, described power supply gives described main board power supply after described first crystal pipe conducting.

Preferably, described pilot circuit also comprises third transistor, described first crystal pipe connects described power supply and connects described mainboard, and described mainboard is used in and detects that described notebook computer disconnects described first crystal pipe and described third transistor when being in described standby state.

Preferably, described feed circuit of mainboard also comprises decision circuitry, and described decision circuitry is third transistor described in conducting when judging that described battery needs charging, and described power supply gives described main board power supply after described third transistor conducting.

Preferably, described pilot circuit also comprises the 4th transistor, described 4th transistor connects described mainboard and connects described third transistor, described decision circuitry comprises the 5th transistor connecting described 4th transistor, described decision circuitry is the 5th transistor described in conducting when judging that described battery needs charging, the conducting after described 5th transistor turns of described 4th transistor, the conducting after described 4th transistor turns of described third transistor.

Preferably, described decision circuitry also comprises the 6th transistor connecting described 5th transistor, described decision circuitry is judging that the electricity of described battery is lower than conducting during reference electric quantity the 6th transistor, the conducting after described 6th transistor turns of described 5th transistor, the conducting after described 5th transistor turns of described 4th transistor, the conducting after described 4th transistor turns of described third transistor, described power supply gives the charging of described battery after described third transistor conducting.

Preferably, described mainboard comprises a system module and an embedded controller, in order to detect, described notebook computer disconnects described pilot circuit after being in described standby state to described system module, thus described power supply is not powered to described embedded controller.

Preferably, described mainboard also comprises the voltage regulator being connected between described pilot circuit and described embedded controller, described mainboard is also in order to the pilot circuit described in conducting when detecting that described battery needs charging, thus makes described power supply by described voltage regulator to described main board power supply.

Preferably, described feed circuit of mainboard also comprises decision circuitry, described decision circuitry sends charging request signal when judging that described battery needs charging, described charging request signal is sent to described system module by described pilot circuit, described system module sends charge permission signal to described power supply after receiving described charging request signal, described power supply charges to described battery and powers to described embedded controller.

Preferably, described mainboard is also in order to the pilot circuit described in conducting when detecting that the power switch of described notebook computer is unlocked, thus described power supply gives described main board power supply.

Compared with prior art, in described feed circuit of mainboard, the pilot circuit described in conducting when described battery needs charging, described power supply gives described main board power supply, described pilot circuit is disconnected when described notebook computer is in described standby state, thus described power supply is not powered to described mainboard, to reduce power consumption.

Accompanying drawing explanation

Fig. 1 is a functional block diagram of a better embodiment of feed circuit of mainboard of the present invention.

Fig. 2 is a circuit connection diagram of a better embodiment of feed circuit of mainboard of the present invention.

Main element nomenclature

Mainboard 10 System module 13 Embedded controller 15 Voltage regulator 17 Pilot circuit 20 Decision circuitry 30 Power supply 50 Battery 60 Power adaptation device 70

Following embodiment will illustrate the present invention further in conjunction with above-mentioned accompanying drawing.

Embodiment

Referring to Fig. 1, a better embodiment of feed circuit of mainboard of the present invention, a kind of feed circuit of mainboard, is applied in a notebook computer, comprises mainboard 10, pilot circuit 20 and a decision circuitry 30.

Described mainboard 10 connects a power supply 50 by a power adaptation device (adaptor) 70. For giving, a battery 60 charges described power supply 50. Described power supply 50 is for giving described notebook computer by described power adaptation device 70 and powers to described battery 60. Described battery 60 for described power supply 50 do not power described notebook computer to when give described notebook computer power supply.

Described mainboard 10 comprises system module 13, embedded controller 15 and a voltage regulator 17. Whether described system module 13 is in a standby state in order to detect the working order of described notebook computer. In one embodiment, the standby state of described notebook computer comprises sleep state (S3 state), dormant state (S4 state) and closing condition (S5 state). Described system module 13 is in order to when detecting that described notebook computer is in described standby state, to disconnect described pilot circuit 20, thus described power supply 50 is not powered to described embedded controller 15. Described system module 13 is also in order to detect described notebook computer to send a start signal when being unlocked and pilot circuit 20 described in conducting, thus described power supply 50 powers to described embedded controller 15.

Referring to Fig. 2, described pilot circuit 20 comprises multiple transistor, multiple diode and multiple resistance. Multiple transistors of described pilot circuit 20 comprise a first crystal pipe Q1, a two-transistor Q2, a third transistor Q3, one the 4th transistor Q4 and the 5th transistor Q5. Multiple diodes of described pilot circuit 20 comprise one first diode D1, one the 2nd diode D2, one the 3rd diode D3, and one the 4th diode D4.

Described decision circuitry 30 comprises multiple transistor and multiple resistance. Multiple transistors of described decision circuitry 30 comprise one the 6th transistor Q6 and the 7th transistor Q7.

In one embodiment, described transistor is field effect transistor, described first crystal pipe Q1, described two-transistor Q2, described 4th transistor Q4, described 5th transistor Q5 and described 6th transistor Q6 are N-channel field effect transistor, and described third transistor Q3 and described 7th transistor Q7 is P-channel field effect transistor.

Described power supply 50 connects described power adaptation device 70. Described battery 60 is connected the source S of described first crystal pipe Q1 with described power adaptation device 70 after being connected, the drain D of described first crystal pipe Q1 connects described voltage regulator 17. It is connected one first resistance R1 between the source S of described first crystal pipe Q1 and the grid G of described first crystal pipe Q1. It is connected one the 2nd resistance R2 between the grid G of described first crystal pipe Q1 and the drain D of described two-transistor Q2. The source S ground connection of described two-transistor Q2. The grid G of described two-transistor Q2 connects the negative pole of described first diode D1 and connects the negative pole of described 2nd diode D2. The positive pole of described first diode D1 connects described embedded controller 15. The positive pole of described 2nd diode D2 connects described system module 13. The drain D of described third transistor Q3 connects described voltage regulator 17. The source S of described third transistor Q3 connects described power adaptation device 70.Described third transistor Q3 grid G and the source S of described third transistor Q3 between be connected one the 3rd resistance R3. Described third transistor Q3 grid G and the drain D of described 4th transistor Q4 between be connected one the 4th resistance R4. The grid G of described 4th transistor Q4 connects the negative pole of described 3rd diode D3. The source S of described 4th transistor Q4 connects the drain D of described 5th transistor Q5. The source S ground connection of described 5th transistor Q5. The grid of described 5th transistor Q5 connects the negative pole of described 4th diode D4.

Described battery 60 connects the source S of described 6th transistor Q6, the source S of described 6th transistor Q6 connects the grid G of described 7th transistor Q7 by one the 5th resistance R5, the grid G of described 6th transistor Q6 connects the drain D of described 7th transistor Q7 by one the 6th resistance R6, the grid G of described 7th transistor Q7 connects the source S of described 6th transistor Q6 by one the 7th resistance R7, the grid G of described 7th transistor Q7 passes through one the 8th resistance R8 ground connection, the source S ground connection of described 7th transistor Q7. The drain D of described 6th transistor Q6 connects one end of one the 9th resistance R9. The other end of described 9th resistance R9 is by 1 the tenth resistance R10 ground connection. The other end of described 9th resistance R9 also connects the positive pole of described 3rd diode D3. The positive pole of described 4th diode D4 connects described power adaptation device 70 by 1 the 11 resistance R11. The positive pole of described 4th diode D4 is by 1 the 12 resistance R12 ground connection.

The principle of work of described feed circuit of mainboard is: when described system module 13 detects that described notebook computer is in standby state, described first crystal pipe Q1 and described third transistor Q3 disconnects, described pilot circuit 20 disconnects, and described power supply 50 is not powered to described embedded controller 15. When the power switch of notebook computer is unlocked, described system module 13 sends a start signal, and described start signal is sent to described two-transistor Q2 by described 2nd diode D2, thus conducting two-transistor Q2 and first crystal pipe Q1. Described power supply 50 powers to described embedded controller 15 by described power adaptation device 70 and described voltage regulator 17. Described embedded controller 15 sends a starting-up signal. Described starting-up signal is sent to described first crystal pipe Q1 by described first diode D1. Described notebook computer is started shooting. When the electricity of described battery 60 is lower than a reference electric quantity, described 7th transistor Q7 and described 6th transistor Q6 conducting, described decision circuitry 30 exports a charging request signal to described 4th transistor Q4. Described system module 13 judges after receiving described charging request signal whether described power supply 50 is connected to described notebook computer by described power adaptation device 70. When described power supply 50 is connected to described notebook computer by described power adaptation device 70, described system module 13 sends a charge permission signal. Described charge permission signal is sent to described 5th transistor Q5 by described 4th diode D4 and the 5th transistor Q5 described in conducting. Described third transistor Q3 conducting. Described voltage regulator 17 is opened. Described power supply 50 powers and opens described embedded controller 15 to described embedded controller 15. Described embedded controller 15 sends a charging signals. Described charging signals is sent to described first crystal pipe Q1 by described first diode D1.Described battery 60 charges.

In described feed circuit of mainboard, when described notebook computer is in non-standby state, described pilot circuit is connected with described embedded controller 15 and described power supply 50, and described power supply 50 powers to described embedded controller 15; When described notebook computer is in standby state, described pilot circuit 20 disconnects the connection of described embedded controller 15 with described power supply 50, thus described power supply 50 powers to described embedded controller 15, thus reduces power consumption.

To one skilled in the art, it is possible to combine, according to the scheme of the invention of the present invention and invention design, the actual needs produced and make other and change accordingly or adjustment, and these change and adjustment all should belong to scope disclosed in this invention.

Claims (10)

1. a feed circuit of mainboard, comprise the mainboard for connecting power supply, described power supply is for charging to notebook computer power supply and to battery, it is characterized in that: described feed circuit of mainboard also comprises the pilot circuit connecting described mainboard, described power supply gives described main board power supply by described pilot circuit, described mainboard is in order to detecting that described notebook computer disconnects described pilot circuit when being in standby state, thus described power supply is not powered to described mainboard, described mainboard is also in order to the pilot circuit described in conducting when detecting that described battery needs charging, thus described power supply can be given described main board power supply and charge to described battery.
2. feed circuit of mainboard as claimed in claim 1, it is characterized in that: described pilot circuit comprises first crystal pipe and two-transistor, described first crystal pipe connects described power supply and connects described mainboard, described two-transistor is connected between described mainboard and described first crystal pipe, described mainboard is two-transistor described in conducting when detecting that described battery needs charging, described first crystal pipe conducting after described two-transistor conducting, described power supply gives described main board power supply after described first crystal pipe conducting.
3. feed circuit of mainboard as claimed in claim 2, it is characterized in that: described pilot circuit also comprises third transistor, described first crystal pipe connects described power supply and connects described mainboard, and described mainboard is used in and detects that described notebook computer disconnects described first crystal pipe and described third transistor when being in described standby state.
4. feed circuit of mainboard as claimed in claim 3, it is characterized in that: described feed circuit of mainboard also comprises decision circuitry, described decision circuitry is third transistor described in conducting when judging that described battery needs charging, and described power supply gives described main board power supply after described third transistor conducting.
5. feed circuit of mainboard as claimed in claim 4, it is characterized in that: described pilot circuit also comprises the 4th transistor, described 4th transistor connects described mainboard and connects described third transistor, described decision circuitry comprises the 5th transistor connecting described 4th transistor, described decision circuitry is the 5th transistor described in conducting when judging that described battery needs charging, the conducting after described 5th transistor turns of described 4th transistor, the conducting after described 4th transistor turns of described third transistor.
6. feed circuit of mainboard as claimed in claim 5, it is characterized in that: described decision circuitry also comprises the 6th transistor connecting described 5th transistor, described decision circuitry is judging that the electricity of described battery is lower than conducting during reference electric quantity the 6th transistor, the conducting after described 6th transistor turns of described 5th transistor, the conducting after described 5th transistor turns of described 4th transistor, the conducting after described 4th transistor turns of described third transistor, described power supply gives the charging of described battery after described third transistor conducting.
7. feed circuit of mainboard as claimed in claim 1, it is characterized in that: described mainboard comprises a system module and an embedded controller, in order to detect, described notebook computer disconnects described pilot circuit after being in described standby state to described system module, thus described power supply is not powered to described embedded controller.
8. feed circuit of mainboard as claimed in claim 7, it is characterized in that: described mainboard also comprises the voltage regulator being connected between described pilot circuit and described embedded controller, described mainboard is also in order to the pilot circuit described in conducting when detecting that described battery needs charging, thus makes described power supply by described voltage regulator to described main board power supply.
9. feed circuit of mainboard as claimed in claim 8, it is characterized in that: described feed circuit of mainboard also comprises decision circuitry, described decision circuitry sends charging request signal when judging that described battery needs charging, described charging request signal is sent to described system module by described pilot circuit, described system module sends charge permission signal to described power supply after receiving described charging request signal, described power supply charges to described battery and powers to described embedded controller.
10. feed circuit of mainboard as claimed in claim 1, it is characterised in that: described mainboard is also in order to the pilot circuit described in conducting when detecting that the power switch of described notebook computer is unlocked, thus described power supply gives described main board power supply.
CN201410639009.7A 2014-11-13 2014-11-13 Mainboard power supply circuit CN105652995A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107831884A (en) * 2017-10-24 2018-03-23 曙光信息产业(北京)有限公司 The electric power system of computer motherboard
CN108227900A (en) * 2017-12-29 2018-06-29 深圳Tcl新技术有限公司 Electronic equipment, energy-saving control method, energy saver and readable storage medium storing program for executing
CN110196628A (en) * 2019-06-04 2019-09-03 山东浪潮人工智能研究院有限公司 It is a kind of for extend tablet computer shutdown after service time of battery method and system

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Publication number Priority date Publication date Assignee Title
US20100262849A1 (en) * 2009-04-10 2010-10-14 Micro-Star International Co., Ltd. Electronic device for reducing power consumption during sleep mode of computer motherboard and motherboard thereof
CN101887299A (en) * 2009-05-15 2010-11-17 华硕电脑股份有限公司 Power supply control circuit and control method of computer system
CN103116394A (en) * 2011-11-16 2013-05-22 纬创资通股份有限公司 Power control device and electronic device using the same
CN103838349A (en) * 2012-11-21 2014-06-04 技嘉科技股份有限公司 Power control system and power control method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100262849A1 (en) * 2009-04-10 2010-10-14 Micro-Star International Co., Ltd. Electronic device for reducing power consumption during sleep mode of computer motherboard and motherboard thereof
CN101887299A (en) * 2009-05-15 2010-11-17 华硕电脑股份有限公司 Power supply control circuit and control method of computer system
CN103116394A (en) * 2011-11-16 2013-05-22 纬创资通股份有限公司 Power control device and electronic device using the same
CN103838349A (en) * 2012-11-21 2014-06-04 技嘉科技股份有限公司 Power control system and power control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107831884A (en) * 2017-10-24 2018-03-23 曙光信息产业(北京)有限公司 The electric power system of computer motherboard
CN108227900A (en) * 2017-12-29 2018-06-29 深圳Tcl新技术有限公司 Electronic equipment, energy-saving control method, energy saver and readable storage medium storing program for executing
CN110196628A (en) * 2019-06-04 2019-09-03 山东浪潮人工智能研究院有限公司 It is a kind of for extend tablet computer shutdown after service time of battery method and system

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