CN101625588B - Pwm控制器供电电路 - Google Patents

Pwm控制器供电电路 Download PDF

Info

Publication number
CN101625588B
CN101625588B CN2008103026559A CN200810302655A CN101625588B CN 101625588 B CN101625588 B CN 101625588B CN 2008103026559 A CN2008103026559 A CN 2008103026559A CN 200810302655 A CN200810302655 A CN 200810302655A CN 101625588 B CN101625588 B CN 101625588B
Authority
CN
China
Prior art keywords
pwm controller
electronic switch
computer
resistance
feed circuit
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
CN2008103026559A
Other languages
English (en)
Other versions
CN101625588A (zh
Inventor
邹华
何凤龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Huabo Enterprise Management Consulting Co ltd
State Grid Shanghai Electric Power Co Ltd
Original Assignee
Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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.)
Filing date
Publication date
Application filed by Hongfujin Precision Industry Shenzhen Co Ltd, Hon Hai Precision Industry Co Ltd filed Critical Hongfujin Precision Industry Shenzhen Co Ltd
Priority to CN2008103026559A priority Critical patent/CN101625588B/zh
Priority to US12/192,088 priority patent/US20100007400A1/en
Publication of CN101625588A publication Critical patent/CN101625588A/zh
Application granted granted Critical
Publication of CN101625588B publication Critical patent/CN101625588B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/62—Switching arrangements with several input- output-terminals, e.g. multiplexers, distributors
    • H03K17/6257—Switching arrangements with several input- output-terminals, e.g. multiplexers, distributors with several inputs only combined with selecting means
    • H03K17/6264—Switching arrangements with several input- output-terminals, e.g. multiplexers, distributors with several inputs only combined with selecting means using current steering means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/36—Means for starting or stopping converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Landscapes

  • Electronic Switches (AREA)
  • Dc-Dc Converters (AREA)

Abstract

一种PWM控制器供电电路，包括一电子开关、一第一电阻及一二极管，所述电子开关的第一端连接至一电脑的一控制信号端，第二端连接至电脑的待机电源，第三端通过所述第一电阻连接至PWM控制器的电源输入端，所述二极管的阳极连接至所述电脑的系统电源，阴极通过所述第一电阻连接至PWM控制器的电源输入端，当需将电脑由休眠状态唤醒时，所述控制信号端输出低电平控制所述电子开关导通，所述待机电源通过所述第一电阻为所述PWM控制器提供输入电压，当电脑正常工作时，所述控制信号端输出高电平使电子开关截止，所述系统电源通过所述二极管和第一电阻为PWM控制器提供输入电压。所述PWM控制器供电电路结构简单，成本较低。

Description

PWM控制器供电电路
技术领域
本发明涉及一种供电电路，特别涉及一种电脑主板上PWM控制器的供电电路。
背景技术
电脑主板上具有一PWM(脉冲宽度调制)控制器，用来控制外部电路将主机电源输出的电压转换为电脑工作所需的各种电压。
目前，很多电脑在进入休眠状态后，都无法唤醒恢复至正常工作状态，而自动重启，给用户带来诸多不便，这通常是因为电脑在唤醒时，PWM控制器的输入电压达不到某一个规定的电压值，导致电脑不能正常唤醒。
发明内容
鉴于上述内容，有必要提供一种PWM控制器的供电电路，保证电脑进入休眠状态后可以正常唤醒。
一种PWM控制器供电电路，包括一电子开关、一第一电阻及一二极管，所述电子开关的第一端连接至一电脑的一控制信号端，第二端连接至电脑的待机电源，第三端通过所述第一电阻连接至PWM控制器的电源输入端，所述二极管的阳极连接至所述电脑的系统电源，阴极通过所述第一电阻连接至PWM控制器的电源输入端，当需将电脑由休眠状态唤醒时，所述控制信号端输出低电平控制所述电子开关导通，所述待机电源通过所述第一电阻为所述PWM控制器提供输入电压，当电脑正常工作时，所述控制信号端输出高电平使电子开关截止，所述系统电源通过所述二极管和第一电阻为PWM控制器提供输入电压。
所述PWM控制器供电电路仅通过所述电阻、二极管以及电子开关，避免了PWM控制器的输入电压过低所导致的电脑无法唤醒的问题，结构简单，成本较低。
附图说明
下面参照附图结合具体实施方式对本发明作进一步的描述。
图1为本发明PWM控制器供电电路较佳实施方式的电路图。
具体实施方式
请参照图1，本发明PWM控制器供电电路包括一二极管D10，一电子开关Q及电阻R10和R20，所述二极管D10的阳极连接至电脑的系统电源端12V_SYS，阴极通过电阻R10连接至一PWM控制器20的电源输入端PWM_Vcc，所述电子开关的第一端1通过所述电阻R20连接至电脑的PWRGD信号端，第二端2连接至电脑的待机电源端5V_SB，第三端3通过电阻R10连接至PWM控制器20的电源输入端PWM_Vcc，PWRGD信号端在电脑正常工作时为高电平，在电脑休眠时及唤醒的瞬间为低电平。本实施方式中，所述电子开关Q为一PNP型三极管或P沟道MOS型场效应晶体管，其第一、第二、第三端1、2、3分别为所述PNP型三极管的基极，发射极和集电极，或分别为所述P沟道MOS型场效应晶体管的栅极，源极和漏极。
当电脑进入休眠后唤醒的瞬间，系统电源端12V_SYS无电源输出，所述PWRGD信号端输出低电平使电子开关Q导通，所述电子开关Q导通后，其第二、第三端2、3之间的电压大约为0V，此时待机电源端5V_SB直接通过电阻R10给PWM控制器20提供输入电压，所述电子开关不会对所述PWM控制器的输入电压进行分压，因此不会出现PWM控制器的输入电压过低的问题，保证电脑正常唤醒，而不需要重新启动，本实施方式中，所述PWM控制器20的型号为RT9214，所述PWM控制器供电电路保证PWM控制器20的输入电压大于4.75V，使电脑正常唤醒。电脑正常工作时，所述待机电源端5V_SB无电源输出，所述PWRGD信号端输出高电平，所述电子开关Q截止，所述系统电源端12V_SYS通过二极管D10和电阻R10为PWM控制器20提供输入电压。
本发明PWM控制器供电电路仅通过所述电阻R10、R20，二极管D10以及电子开关Q，实现了电脑的可靠唤醒，结构简单，成本较低。

Claims (6)

1.一种PWM控制器供电电路，包括一电子开关、一第一电阻及一二极管，所述电子开关的第一端连接至一电脑的一控制信号端，第二端连接至电脑的待机电源，第三端通过所述第一电阻连接至PWM控制器的电源输入端，所述二极管的阳极连接至所述电脑的系统电源，阴极通过所述第一电阻连接至PWM控制器的电源输入端，当需将电脑由休眠状态唤醒时，所述控制信号端输出低电平控制所述电子开关导通，所述待机电源通过所述第一电阻为所述PWM控制器提供输入电压，当电脑正常工作时，所述控制信号端输出高电平使电子开关截止，所述系统电源通过所述二极管和第一电阻为PWM控制器提供输入电压。
2.如权利要求1所述的PWM控制器供电电路，其特征在于：所述PWM控制器的型号为RT9214。
3.如权利要求1所述的PWM控制器供电电路，其特征在于：所述电子开关的第一端通过一第二电阻连接至所述控制信号端。
4.如权利要求1所述的PWM控制器供电电路，其特征在于：所述电子开关为一PNP型三极管，其第一、第二、第三端分别为基极、发射极和集电极。
5.如权利要求1所述的PWM控制器供电电路，其特征在于：所述电子开关为一P沟道MOS型场效应晶体管，其第一、第二、第三端分别为栅极、源极和漏极。
6.如权利要求1所述的PWM控制器供电电路，其特征在于：所述控制信号端为电脑主板上的PWRGD信号端。
CN2008103026559A 2008-07-08 2008-07-08 Pwm控制器供电电路 Active CN101625588B (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2008103026559A CN101625588B (zh) 2008-07-08 2008-07-08 Pwm控制器供电电路
US12/192,088 US20100007400A1 (en) 2008-07-08 2008-08-14 Power supply circuit for pulse width modulation controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2008103026559A CN101625588B (zh) 2008-07-08 2008-07-08 Pwm控制器供电电路

Publications (2)

Publication Number Publication Date
CN101625588A CN101625588A (zh) 2010-01-13
CN101625588B true CN101625588B (zh) 2011-03-23

Family

ID=41504616

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2008103026559A Active CN101625588B (zh) 2008-07-08 2008-07-08 Pwm控制器供电电路

Country Status (2)

Country Link
US (1) US20100007400A1 (zh)
CN (1) CN101625588B (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102221868A (zh) * 2010-04-15 2011-10-19 鸿富锦精密工业（深圳）有限公司 备用电源产生电路
CN103904630A (zh) * 2012-12-26 2014-07-02 鸿富锦精密工业（深圳）有限公司 放电电路
CN105784035A (zh) * 2016-03-22 2016-07-20 中国计量学院 一种低功耗浸入型热式气体流量测量方法及装置
CN107066012B (zh) * 2017-06-16 2018-12-28 上海思依暄机器人科技股份有限公司 一种开关电路及电子设备
CN109407577B (zh) * 2018-09-30 2021-05-25 珠海格力电器股份有限公司 一种唤醒电路、唤醒方法以及电饭煲

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5481178A (en) * 1993-03-23 1996-01-02 Linear Technology Corporation Control circuit and method for maintaining high efficiency over broad current ranges in a switching regulator circuit
CN1716157A (zh) * 2004-06-30 2006-01-04 技嘉科技股份有限公司 自动调整电路工作频率的交换式供电系统及其方法
CN1877673A (zh) * 2006-06-29 2006-12-13 彩虹集团电子股份有限公司 一种减小谐振式等离子显示器电源待机功耗的方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5341284A (en) * 1993-06-24 1994-08-23 Hipro Electronics Co., Ltd. Power-saving power supply unit
JP3696470B2 (ja) * 2000-02-22 2005-09-21 富士通株式会社 Ｄｃ−ｄｃ変換回路、電源選択回路、および機器装置
TW200832124A (en) * 2007-01-30 2008-08-01 Winbond Electronics Corp Pulse width modulation (PWM) circuit and method for enabling PWM circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5481178A (en) * 1993-03-23 1996-01-02 Linear Technology Corporation Control circuit and method for maintaining high efficiency over broad current ranges in a switching regulator circuit
CN1716157A (zh) * 2004-06-30 2006-01-04 技嘉科技股份有限公司 自动调整电路工作频率的交换式供电系统及其方法
CN1877673A (zh) * 2006-06-29 2006-12-13 彩虹集团电子股份有限公司 一种减小谐振式等离子显示器电源待机功耗的方法

Also Published As

Publication number Publication date
US20100007400A1 (en) 2010-01-14
CN101625588A (zh) 2010-01-13

Similar Documents

Publication Publication Date Title
CN101859173B (zh) 待机休眠状态下的计算机主机板的节电装置及其主机板
EP2267575A2 (en) Electronic device for reducing power consumption of computer motherboard and motherboard thereof
US20080168288A1 (en) Power-save circuit for computer
CN102856933A (zh) Usb充电电路
CN101625588B (zh) Pwm控制器供电电路
CN106843442B (zh) 基于数据保护的车载多媒体低功耗休眠装置及方法
US20060132199A1 (en) Supply voltage switching circuit
KR101759345B1 (ko) 딥 슬립 모드를 지원하는 절전형 모니터의 제어 장치 및 방법
CN105487638B (zh) 电子电路系统及其降低功耗的方法
US8200997B2 (en) Computer wake up circuit includes a switch configured to prevent a control signals from an I/O controller being transmitted to south-bridge
TW201416845A (zh) 主機板
US20100250983A1 (en) Power saving control system
CN110323825B (zh) 一种电源电路切换装置、方法和物联网设备
TWI461897B (zh) 電源控制裝置及電子裝置
CN101727167B (zh) 电源切换电路
CN102937829A (zh) 节能管理电路
US9705323B2 (en) Power supply system and power control circuit thereof
US20060139829A1 (en) Supply voltage switching circuit
CN215932416U (zh) 唤醒电路
CN108988300B (zh) 一种笔记本电源电路自断电电路结构及控制方法
TWI382302B (zh) Ｐｗｍ控制器供電電路
CN219268834U (zh) 一种自动关机控制电路
CN114416190B (zh) 安卓设备与电脑usb联动休眠唤醒电路
CN210609113U (zh) 一种一键开关机电路
CN221174779U (zh) 一种rtc电池电压检测电路

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20151118

Address after: 200002 Shanghai City, Pudong New Area source deep road, No. 1122

Patentee after: STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER Co.

Address before: 510640 Guangdong city of Guangzhou province Tianhe District gold Yinglu No. 1 was 1106 room two

Patentee before: GUANGDONG HUABO ENTERPRISE MANAGEMENT CONSULTING Co.,Ltd.

Effective date of registration: 20151118

Address after: 510640 Guangdong city of Guangzhou province Tianhe District gold Yinglu No. 1 was 1106 room two

Patentee after: GUANGDONG HUABO ENTERPRISE MANAGEMENT CONSULTING Co.,Ltd.

Address before: 518109 Guangdong city of Shenzhen province Baoan District Longhua Town Industrial Zone tabulaeformis tenth East Ring Road No. 2 two

Patentee before: HONG FU JIN PRECISION INDUSTRY (SHENZHEN) Co.,Ltd.

Patentee before: HON HAI PRECISION INDUSTRY Co.,Ltd.