CN101783581A - 多相驱动电路 - Google Patents

多相驱动电路 Download PDF

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CN101783581A
CN101783581A CN200910300241A CN200910300241A CN101783581A CN 101783581 A CN101783581 A CN 101783581A CN 200910300241 A CN200910300241 A CN 200910300241A CN 200910300241 A CN200910300241 A CN 200910300241A CN 101783581 A CN101783581 A CN 101783581A
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phase
driver
pin
pulse
signal
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戴方达
林承庠
邹腾锋
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Priority to CN200910300241A priority Critical patent/CN101783581A/zh
Priority to US12/417,622 priority patent/US8076918B2/en
Publication of CN101783581A publication Critical patent/CN101783581A/zh
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    • 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • H02M3/1586—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Power Conversion In General (AREA)
  • Electronic Switches (AREA)

Abstract

一种多相驱动电路，用于驱动一负载工作，所述多相驱动电路包括一单相脉宽调制控制器，用于输出一脉宽调制信号；若干可调整相位的驱动器，每一驱动器接收所述脉宽调制信号，并调整所述脉宽调制信号的相位以输出经调相后的脉宽调制信号及一驱动信号；及若干与所述若干驱动器一一对应连接的调相开关电路，每一调相开关电路接收对应连接的驱动器所输出的驱动信号及经调相后的脉宽调制信号，所述调相开关电路在所述驱动信号的控制下输出一驱动电压，并在所述经调相后的脉宽调制信号的控制下将所述驱动电压进行相位调整后提供给所述负载，以使所述负载接收到多相的驱动电压信号。所述多相驱动电路可方便实现多相驱动信号驱动负载进行工作。

Description

多相驱动电路
技术领域
本发明涉及一种驱动电路，特别涉及一种多相驱动电路。
背景技术
目前，在直流转直流(DC-DC)及交流转直流(AC-DC)的系统中经常要使用具有多相输出的驱动电路来驱动负载工作。为提供具有多相输出的驱动电路，一般需提供一个多相脉宽调制控制器(multi-phase PWM controller)，该多相脉宽调制控制器可同时提供多个相位不同的脉宽调制信号分别提供给多个驱动器以实现多相位驱动信号的输出。
但是，为实现多相输出的驱动电路，必须要应用具有可产生对应数量脉宽调制信号的多相脉宽调制控制器，这会造成设计上的限制及困难。而且，一般的多相脉宽调制控制器的价格较贵。
发明内容
鉴于上述内容，本发明提供一种可方便实现具有多相输出的多相驱动电路。
一种多相驱动电路，用于驱动一负载工作，所述多相驱动电路包括一单相脉宽调制控制器，用于输出一脉宽调制信号；若干可调整相位的驱动器，每一驱动器接收所述脉宽调制信号，并调整所述脉宽调制信号的相位以输出经调相后的脉宽调制信号及一驱动信号；及若干与所述若干驱动器一一对应连接的调相开关电路，每一调相开关电路接收对应连接的驱动器所输出的驱动信号及经调相后的脉宽调制信号，所述调相开关电路在所述驱动信号的控制下输出一驱动电压，并在所述经调相后的脉宽调制信号的控制下将所述驱动电压进行相位调整后提供给所述负载，以使所述负载接收到多相的驱动电压信号。
相较现有技术，所述多相驱动电路通过所述单相脉宽调制控制器输出一脉宽调制信号给多个可调整相位的驱动器，每一驱动器对应调整接收到的脉宽调制信号的相位，从而输出具有多相的驱动信号给负载工作。由于所述多相驱动电路仅使用了一个单相脉宽调制控制器，故设计上的限制将大大降低。同时，由于是通过每一驱动器自身进行相位调整，故可使相位调整更加灵活，以便适用于各种场合。
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为本发明多相驱动电路的较佳实施方式的电路图。
具体实施方式
请参照图1，本发明多相驱动电路的较佳实施方式包括一单相脉宽调制控制器(signal-phase PWM controller)10、若干可调整相位的驱动器20及若干与所述驱动器20对应的调相开关电路30。本实施方式仅以四个驱动器20举例说明，其他实施方式可根据需要相应的增加或减少驱动器20的数量以满足实际需求。
所述调相开关电路30接收所述驱动器20发出的驱动信号及经调相后的脉宽调制信号，并在所述驱动信号的控制下输出一驱动电压，及在所述经调相后的脉宽调制信号的控制下将所述驱动电压的相位进行调整，以使每一调相开关电路30输出至电压输出端Vo的驱动电压的相位均不同，所述多个相位不同的驱动电压同时驱动一负载40，以使所述负载40在多相驱动电压下工作。其中，每一驱动器20与对应的调相开关电路30的电路连接关系及工作原理均相同，以下仅详细说明其中一个驱动器20与其对应的调相开关电路30的连接关系及工作原理，其它不再赘述。
所述单相脉宽调制控制器10的脉宽调制信号输出端PWM分别连接至每一驱动器20的脉宽调制信号引脚PWM，以提供同一相位的脉宽调制信号给每一驱动器20。
所述调相开关电路30包括一第一场效应管Q1、一第二场效应管Q2、一电感L、一第一电容C1、一电压接收端Vin及一电压输出端Vo。所述电压接收端Vin用于接收一输入电压，所述电压输出端Vo用于输出调相后的驱动电压给所述负载40。
所述驱动器20的电源引脚VCC连接一电源Vcc，接地引脚GND接地。每一驱动器20的均流引脚Lavg互相连接，所述驱动器20的两侦测引脚CS-、CS+分别连接至所述电感L的两端，以侦测流经电感L的电流并反馈给所述驱动器20内部的平均电流控制器，所述平均电流控制器通过均流引脚Lavg输出均流信号给每一驱动器20的均流引脚Lavg，以保证所述若干调相开关电路30输出的电流均是相等的。所述驱动器20的相位引脚PHASE通过所述电感L连接所述电压输出端Vo。所述驱动器20的调相引脚PH#通过一调相电阻R接地，所述驱动器20内部的相位控制器根据所述调相电阻R电阻值的大小可改变接收到的脉宽调制信号的相位，所述相位引脚PHASE接收经调整相位后的脉宽调制信号给对应的调相开关电路30以调整输出的驱动电压的相位。所述驱动器20的引导引脚BOOT通过一第二电容C2连接至所述驱动器20的相位引脚PHASE，以拉高所述相位引脚PHASE的电压(根据具体驱动器的型号也可以不进行电位拉高，即不需将引导引脚BOOT连接至相位引脚PHASE)。
所述驱动器20的低通引脚LGATE连接至所述第一场效应管Q1的栅极，所述第一场效应管Q1的源极接地，漏极连接至所述驱动器20的相位引脚PHASE及所述第二场效应管Q2的源极，所述驱动器20的高通引脚UGATE连接至所述第二场效应管Q2的栅极，所述第二场效应管Q2的漏极连接至电压接收端Vin，所述第一电容C1连接在所述电压输出端Vo及地之间，起到滤波的作用。本实施方式中，所述驱动器20调整相位的功能是通过改变所述调相电阻R的电阻值来实现的，在其他实施方式中，也可根据需要将所述驱动器20内部的相位控制器设计成可通过改变其他电子元件的参数来实现调整相位的功能，例如可通过改变电容元件的电容值或电感元件的电感值来实现，不仅限于上述调相电阻R。
工作时，所述单相脉宽调制控制器10的反馈引脚FB接收所述负载40发出的控制信号后输出同一相位的脉宽调制信号给每一个驱动器20，每一驱动器20通过各自的调相电阻R的电阻值调整接收到的脉宽调制信号的相位，以实现每一驱动器20输出信号的相位不同，即达到多相驱动输出的功能。每一驱动器20通过其上的低通引脚LGATE及高通引脚UGATE输出低通驱动信号及高通驱动信号，以分别控制所述第一场效应管Q1及第二场效应管Q2的截止与导通，所述电压接收端Vin的输入电压在所述第一场效应管Q1截止及第二场效应管Q2导通条件下，输出经所述相位引脚PHASE进行相位调整后的驱动电压给所述电压输出端Vo，以驱动后端负载40，由于通过每一驱动器20输出的驱动电压的相位不同，故负载40可在多相驱动电压下工作，满足了其多相电压驱动的要求。
由于本发明多相驱动电路仅使用了一个单相脉宽调制控制器10，而没有使用现有技术中一个或多个多相脉宽调制控制器，故设计上的限制大大降低。同时，由于通过调整每一驱动器20的调相电阻R可对应调整接收到的脉宽调制信号的相位，故可实现多相驱动输出后端负载，并且该相位调整更加灵活，可适用于各种需要多相驱动电路。

Claims (9)

1.一种多相驱动电路，用于驱动一负载工作，所述多相驱动电路包括：
一单相脉宽调制控制器，用于输出一脉宽调制信号；
若干可调整相位的驱动器，每一驱动器接收所述脉宽调制信号，并调整所述脉宽调制信号的相位以输出经调相后的脉宽调制信号及一驱动信号；及
若干与所述若干驱动器一一对应连接的调相开关电路，每一调相开关电路接收对应连接的驱动器所输出的驱动信号及经调相后的脉宽调制信号，所述调相开关电路在所述驱动信号的控制下输出一驱动电压，并在所述经调相后的脉宽调制信号的控制下将所述驱动电压进行相位调整后提供给所述负载，以使所述负载接收到多相的驱动电压信号。
2.如权利要求1所述的多相驱动电路，其特征在于：每一驱动器包括一用于调整相位的相位控制器，所述相位控制器通过驱动器上的一调相引脚与一接地的调相电阻相连，所述相位控制器通过改变所述调相电阻的电阻值来调整接收的脉宽调制信号的相位。
3.如权利要求1所述的多相驱动电路，其特征在于：每一驱动器包括一用于调整相位的相位控制器，所述相位控制器通过驱动器上的一调相引脚与一接地的调相电容相连，所述相位控制器通过改变所述调相电容的电容值来调整接收的脉宽调制信号的相位。
4.如权利要求1所述的多相驱动电路，其特征在于：每一驱动器包括一用于调整相位的相位控制器，所述相位控制器通过驱动器上的一调相引脚与一接地的调相电感相连，所述相位控制器通过改变所述调相电感的电感值来调整接收的脉宽调制信号的相位。
5.如权利要求24中任意一项所述的多相驱动电路，其特征在于：每一调相开关电路包括一第一场效应管、一第二场效应管及一电感，所述单相脉宽调制控制器的脉宽调制信号输出端分别连接至每一驱动器的脉宽调制信号引脚，所述驱动器的相位引脚通过所述电感连接一电压输出端，所述驱动器的低通引脚连接至所述第一场效应管的栅极，所述第一场效应管的源极接地，漏极连接至所述驱动器的相位引脚及所述第二场效应管的源极，所述驱动器的高通引脚连接至所述第二场效应管的栅极，所述第二场效应管的漏极接收一输入电压，所述低通引脚及高通引脚输出驱动信号控制所述第一场效应管及第二场效应管的截止与导通以使所述输入电压在所述经调相后的脉宽调制信号的控制下进行相位调整，相位调整后的驱动电压经所述电压输出端输出给所述负载。
6.如权利要求5所述的多相驱动电路，其特征在于：每一驱动器还包括一平均电流控制器，每一驱动器的均流引脚互相连接，每一驱动器的两侦测引脚分别连接至对应调相开关电路的电感的两端，以侦测流经所述电感的电流并反馈给驱动器内部的平均电流控制器，所述平均电流控制器通过所述均流引脚输出均流信号给每一驱动器的均流引脚，以保证所述若干调相开关电路输出的电流是均等的。
7.如权利要求5所述的多相驱动电路，其特征在于：所述电压输出端及地之间还连接一第一电容，起到滤波的作用。
8.如权利要求5所述的多相驱动电路，其特征在于：每一驱动器的引导引脚通过一第二电容连接至其相位引脚，起到拉高电压的作用。
9.如权利要求1所述的多相驱动电路，其特征在于：所述单相脉宽调制控制器输出的脉宽调制信号是在所述单相脉宽调制控制器的反馈引脚接收到所述负载发出的控制信号时产生的。
CN200910300241A 2009-01-16 2009-01-16 多相驱动电路 Pending CN101783581A (zh)

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Cited By (6)

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CN102969895A (zh) * 2011-09-01 2013-03-13 麦奎尔有限公司 开关调节器的多相电力块及开关调节器中的方法
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US8878501B2 (en) 2011-09-01 2014-11-04 Micrel, Inc. Multi-phase power block for a switching regulator for use with a single-phase PWM controller
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CN103034310A (zh) * 2011-09-29 2013-04-10 鸿富锦精密工业（深圳）有限公司 供电系统
CN103034310B (zh) * 2011-09-29 2016-08-03 国网山东省电力公司莒县供电公司 供电系统
CN105391320A (zh) * 2014-09-09 2016-03-09 鸿富锦精密工业（深圳）有限公司 多相电源电路
US9787184B2 (en) 2014-09-09 2017-10-10 Hon Hai Precision Industry Co., Ltd. Multiple-phase power circuit
CN105391320B (zh) * 2014-09-09 2018-10-23 鸿富锦精密工业（深圳）有限公司 多相电源电路
CN109586556A (zh) * 2018-12-10 2019-04-05 郑州云海信息技术有限公司 一种多相脉宽降压调节电路及其调节方法
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CN111478580B (zh) * 2019-01-23 2021-07-27 茂达电子股份有限公司 多信道功率系统及其相位移控制方法

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