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CN109149978A - 超宽电压输出的反激开关电源控制芯片供电电路 - Google Patents

超宽电压输出的反激开关电源控制芯片供电电路 Download PDF

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CN109149978A
CN109149978A CN201810976401.9A CN201810976401A CN109149978A CN 109149978 A CN109149978 A CN 109149978A CN 201810976401 A CN201810976401 A CN 201810976401A CN 109149978 A CN109149978 A CN 109149978A
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power supply
electrically connected
transformer
chip
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陈炯
高俊
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Ningbo Yi Oak Garden Supplies Co Ltd
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Ningbo Yi Oak Garden Supplies Co Ltd
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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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal 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
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal 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
    • H02M7/219—Conversion of ac power input into dc power output without possibility of reversal 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 in a bridge configuration
    • 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
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
    • 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
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

本发明揭示了一种超宽电压输出的反激开关电源控制芯片供电电路，包括桥式整流模块DB1，变压器T，开关电源PWM控制芯片U1，场效应管Q1和三极管Q2，变压器T的辅助绕组的绕向和变压器T的初级绕组的绕向相同；本发明通过在变压器中设置辅助绕组，辅助绕组对控制芯片进行供电，且由于辅助绕组与初级绕组同相耦合，这样一来，能够确保控制芯片的稳定工作，从而能够使得反激开关电源能够在超宽的输出电压范围中稳定工作。

Description

超宽电压输出的反激开关电源控制芯片供电电路
技术领域
本发明涉及开关电源技术领域，具体涉及一种超宽电压输出的反激开关电源控制芯片供电电路。
背景技术
目前，反激开关电源应用在各种电气设备中，但是目前的反激开关电源中的控制芯片的供电电压都是与电源输出的电压有关，这样一来，在反激开关电源使用过程中，当反激开关电源的输出电压浮动较大时，对反激开关电源中的控制芯片的供电电压会超出控制芯片正常工作所需的电压范围，从而会使得反激开关电源无法工作。
发明内容
针对现有技术的不足，本发明提供一种超宽电压输出的反激开关电源控制芯片供电电路，其通过在变压器中设置辅助绕组，辅助绕组对控制芯片进行供电，且由于辅助绕组与初级绕组同相耦合，这样一来，能够确保控制芯片的稳定工作，从而能够使得反激开关电源能够在超宽的输出电压范围中稳定工作。
本发明公开的一种超宽电压输出的反激开关电源控制芯片供电电路，包括桥式整流模块DB1，变压器T，开关电源PWM控制芯片U1，场效应管Q1和三极管Q2，桥式整流模块DB1的两个交流输入端分别与接口L和接口N电连接，桥式整流模块DB1的正极输出端与变压器T的初级绕组的一端电连接，桥式整流模块DB1的正极输出端接地，变压器T的初级绕组的另一端与场效应管Q1的漏极电连接，场效应管Q1的栅极串联电阻R4后与开关电源PWM控制芯片U1的GATE脚电连接，场效应管Q1的源极串联电阻R6后与开关电源PWM控制芯片U1的CS脚电连接，场效应管Q1的源极串联电阻R7后接地，开关电源PWM控制芯片U1的CS脚和CMP脚分别串联电容C5和电容C4后接地，开关电源PWM控制芯片U1的GND脚接地，开关电源PWM控制芯片U1的VDD脚串联电阻R2后与桥式整流模块DB1的正极输出端电连接，三极管Q2的发射极与开关电源PWM控制芯片U1的VDD脚电连接，三极管Q2的基极反向串联稳压二极管ZD1后接地，三极管Q2的基极串联电阻R5后与三极管Q2的集电极电连接，三极管Q2的集电极串联电阻R3后与二极管D2的负极电连接，二极管D2的正极与变压器T的辅助绕组的一端电连接，变压器T的辅助绕组的另一端接地，变压器T的辅助绕组的绕向和变压器T的初级绕组的绕向相同。
本发明公开的一种超宽电压输出的反激开关电源控制芯片供电电路，其中，桥式整流模块DB1的正极输出端串联电容C1后接地。
本发明公开的一种超宽电压输出的反激开关电源控制芯片供电电路，其中，开关电源PWM控制芯片U1的VDD脚串联电容C3后接地。
本发明公开的一种超宽电压输出的反激开关电源控制芯片供电电路，其中，开关电源PWM控制芯片U1的型号为R7731A。
本发明公开的一种超宽电压输出的反激开关电源控制芯片供电电路，其中，变压器T的次级绕组的一端正向串联二极管D1后与接口LED+电连接，变压器T的另一端与接口LED-电连接，接口LED+串联电阻R1后与接口LED-电连接，电阻R1并联有电容C2。
本发明通过在变压器中设置辅助绕组，辅助绕组对控制芯片进行供电，且由于辅助绕组与初级绕组同相耦合，这样一来，能够确保控制芯片的稳定工作，从而能够使得反激开关电源能够在超宽的输出电压范围中稳定工作。
附图说明
此处所说明的附图用来提供对本申请的进一步理解，构成本申请的一部分，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1为本发明的电路原理图。
具体实施方式
以下将以图式揭露本发明的多个实施方式，为明确说明起见，许多实务上的细节将在以下叙述中一并说明。然而，应了解到，这些实务上的细节不应用以限制本发明。也就是说，在本发明的部分实施方式中，这些实务上的细节是非必要的。此外，为简化图式起见，一些习知惯用的结构与组件在图式中将以简单的示意的方式绘示之。
另外，在本发明中如涉及“第一”、“第二”等的描述仅用于描述目的，并非特别指称次序或顺位的意思，亦非用以限定本发明，其仅仅是为了区别以相同技术用语描述的组件或操作而已，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
本发明的超宽电压输出的反激开关电源控制芯片供电电路，包括桥式整流模块DB1，变压器T，开关电源PWM控制芯片U1，场效应管Q1和三极管Q2，桥式整流模块DB1的两个交流输入端分别与接口L和接口N电连接，桥式整流模块DB1的正极输出端与变压器T的初级绕组的一端电连接，桥式整流模块DB1的正极输出端接地，变压器T的初级绕组的另一端与场效应管Q1的漏极电连接，场效应管Q1的栅极串联电阻R4后与开关电源PWM控制芯片U1的GATE脚电连接，场效应管Q1的源极串联电阻R6后与开关电源PWM控制芯片U1的CS脚电连接，场效应管Q1的源极串联电阻R7后接地，开关电源PWM控制芯片U1的CS脚和CMP脚分别串联电容C5和电容C4后接地，开关电源PWM控制芯片U1的GND脚接地，开关电源PWM控制芯片U1的VDD脚串联电阻R2后与桥式整流模块DB1的正极输出端电连接，三极管Q2的发射极与开关电源PWM控制芯片U1的VDD脚电连接，三极管Q2的基极反向串联稳压二极管ZD1后接地，三极管Q2的基极串联电阻R5后与三极管Q2的集电极电连接，三极管Q2的集电极串联电阻R3后与二极管D2的负极电连接，二极管D2的正极与变压器T的辅助绕组的一端电连接，变压器T的辅助绕组的另一端接地，变压器T的辅助绕组的绕向和变压器T的初级绕组的绕向相同；桥式整流模块DB1的正极输出端串联电容C1后接地；开关电源PWM控制芯片U1的VDD脚串联电容C3后接地；开关电源PWM控制芯片U1的型号为R7731A；变压器T的次级绕组的一端正向串联二极管D1后与接口LED+电连接，变压器T的另一端与接口LED-电连接，接口LED+串联电阻R1后与接口LED-电连接，电阻R1并联有电容C2；本发明中的变压器T的辅助绕组的起绕点接地，变压器T的辅助绕组的末端与二极管D2的正极电连接，二极管D2的正极电压跟随输入电压变化，电阻D5、稳压二极管ZD1和三极管Q2构成线性稳压电路，在输入电压过高时，能够保证开关电源PWM控制芯片U1的VDD脚电压的稳定；本发明通过在变压器中设置辅助绕组，辅助绕组对控制芯片进行供电，且由于辅助绕组与初级绕组同相耦合，这样一来，能够确保控制芯片的稳定工作，从而能够使得反激开关电源能够在超宽的输出电压范围中稳定工作。
上所述仅为本发明的实施方式而已，并不用于限制本发明。对于本领域技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原理的内所作的任何修改、等同替换、改进等，均应包括在本发明的权利要求范围之内。

Claims (5)

1.一种超宽电压输出的反激开关电源控制芯片供电电路，其特征在于：包括桥式整流模块DB1，变压器T，开关电源PWM控制芯片U1，场效应管Q1和三极管Q2，所述桥式整流模块DB1的两个交流输入端分别与接口L和接口N电连接，所述桥式整流模块DB1的正极输出端与变压器T的初级绕组的一端电连接，所述桥式整流模块DB1的正极输出端接地，所述变压器T的初级绕组的另一端与场效应管Q1的漏极电连接，所述场效应管Q1的栅极串联电阻R4后与开关电源PWM控制芯片U1的GATE脚电连接，所述场效应管Q1的源极串联电阻R6后与开关电源PWM控制芯片U1的CS脚电连接，所述场效应管Q1的源极串联电阻R7后接地，所述开关电源PWM控制芯片U1的CS脚和CMP脚分别串联电容C5和电容C4后接地，所述开关电源PWM控制芯片U1的GND脚接地，所述开关电源PWM控制芯片U1的VDD脚串联电阻R2后与桥式整流模块DB1的正极输出端电连接，所述三极管Q2的发射极与开关电源PWM控制芯片U1的VDD脚电连接，所述三极管Q2的基极反向串联稳压二极管ZD1后接地，所述三极管Q2的基极串联电阻R5后与三极管Q2的集电极电连接，所述三极管Q2的集电极串联电阻R3后与二极管D2的负极电连接，所述二极管D2的正极与变压器T的辅助绕组的一端电连接，所述变压器T的辅助绕组的另一端接地，所述变压器T的辅助绕组的绕向和变压器T的初级绕组的绕向相同。
2.根据权利要求1所述的超宽电压输出的反激开关电源控制芯片供电电路，其特征在于，所述桥式整流模块DB1的正极输出端串联电容C1后接地。
3.根据权利要求2所述的超宽电压输出的反激开关电源控制芯片供电电路，其特征在于，所述开关电源PWM控制芯片U1的VDD脚串联电容C3后接地。
4.根据权利要求3所述的超宽电压输出的反激开关电源控制芯片供电电路，其特征在于，所述开关电源PWM控制芯片U1的型号为R7731A。
5.根据权利要求4所述的超宽电压输出的反激开关电源控制芯片供电电路，其特征在于，所述变压器T的次级绕组的一端正向串联二极管D1后与接口LED+电连接，所述变压器T的另一端与接口LED-电连接，所述接口LED+串联电阻R1后与接口LED-电连接，所述电阻R1并联有电容C2。
CN201810976401.9A 2018-08-25 2018-08-25 超宽电压输出的反激开关电源控制芯片供电电路 Pending CN109149978A (zh)

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CN109995252A (zh) * 2019-04-22 2019-07-09 合肥惠科金扬科技有限公司 一种稳压电路及开关电源电路
CN114243642A (zh) * 2021-12-31 2022-03-25 东莞欧陆通电子有限公司 欠压保护电路及其开关电源
TWI852029B (zh) * 2022-03-10 2024-08-11 大陸商昂寶電子（上海）有限公司 非對稱半橋返馳變換器電源及其控制晶片和控制方法

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CN109995252A (zh) * 2019-04-22 2019-07-09 合肥惠科金扬科技有限公司 一种稳压电路及开关电源电路
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