[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

WO2019015099A1 - 具有欠压点保护的开关电源及激光投影机 - Google Patents

具有欠压点保护的开关电源及激光投影机 Download PDF

Info

Publication number
WO2019015099A1
WO2019015099A1 PCT/CN2017/103445 CN2017103445W WO2019015099A1 WO 2019015099 A1 WO2019015099 A1 WO 2019015099A1 CN 2017103445 W CN2017103445 W CN 2017103445W WO 2019015099 A1 WO2019015099 A1 WO 2019015099A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
input
power supply
unit
voltage dividing
Prior art date
Application number
PCT/CN2017/103445
Other languages
English (en)
French (fr)
Inventor
熊再祥
李屹
Original Assignee
深圳市光峰光电技术有限公司
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.)
Filing date
Publication date
Application filed by 深圳市光峰光电技术有限公司 filed Critical 深圳市光峰光电技术有限公司
Publication of WO2019015099A1 publication Critical patent/WO2019015099A1/zh

Links

Classifications

    • 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

Definitions

  • the utility model belongs to the technical field of power sources, and particularly relates to a switching power supply and a laser projector with undervoltage protection.
  • the power supply of the related art laser projector uses a LLC half-bridge resonance controller to control DC-DC conversion, the power supply including an LLC resonant half-bridge controller, a voltage feedback unit, and an input circuit unit, the LLC resonant half bridge
  • the controller includes an input voltage signal detection input terminal, a voltage output terminal and a voltage feedback input terminal, the input circuit unit is connected to the input voltage signal detection input terminal, and one end of the voltage feedback unit is connected to the voltage output terminal. The other end is connected to the voltage feedback input to form a feedback circuit.
  • the utility model provides a switching power supply and a projector with low undervoltage points and good starting stability with undervoltage protection.
  • the utility model provides a switching power supply with undervoltage protection, comprising a voltage input circuit unit, an LLC half-bridge resonance controller and a voltage feedback unit;
  • the LLC half-bridge resonance controller comprises an input voltage signal detection input terminal and a voltage output And a voltage feedback input terminal, the voltage input circuit unit is electrically connected to the input voltage signal detection input terminal, one end of the voltage feedback unit is electrically connected to the voltage output terminal, and the other end thereof is electrically connected to the voltage a feedback input terminal and forming a feedback circuit;
  • the voltage input circuit unit includes a voltage input terminal and a voltage dividing circuit for reducing an undervoltage point of the circuit to 73V or less, the voltage dividing circuit being connected in series to the voltage input terminal and the The input voltage signal is detected between the inputs.
  • the voltage dividing circuit comprises a first voltage dividing unit and a second voltage dividing unit, wherein the first voltage dividing unit is connected in series between the voltage input end and the input voltage signal detecting input end, wherein the One end of the two-dividing unit is electrically connected between the voltage dividing resistor unit and the input voltage signal detecting input terminal, and the other end is grounded.
  • the first voltage dividing unit comprises a first resistor, a second resistor and a third resistor formed in series with each other, and the second voltage dividing unit is a voltage dividing component with adjustable resistance value.
  • the resistance values of the first resistor, the second resistor and the third resistor are both 2MR, and the resistance value of the voltage dividing component is adjustable between 110KR and 122.4KR.
  • the voltage dividing component is a sliding varistor.
  • the voltage dividing component has a resistance value of 110 KR.
  • the second voltage dividing unit is a fixed value resistor, and the resistance value of the fixed value resistor may be any value between 110KR and 122.4KR.
  • the total resistance of the first voltage dividing unit is 6 MR.
  • the voltage feedback unit is an optocoupler feedback circuit.
  • the utility model also provides a laser projector, comprising the above-mentioned switching power supply with undervoltage protection provided by the utility model.
  • the switching power supply with undervoltage protection of the present invention increases the design of the voltage input circuit unit to a voltage dividing circuit for reducing the undervoltage point of the circuit, and realizes the voltage dividing circuit through the voltage dividing circuit
  • the undervoltage point of the switching power supply is reduced to below 73V, so that the switching power supply and the laser projector can be normally started under the condition of 0 degree, and the stability and reliability are strong.
  • FIG. 1 is a schematic structural view of a switching power supply with undervoltage protection according to the present invention.
  • the utility model provides a switching power supply 10 with undervoltage protection, comprising a voltage input circuit unit 1, an LLC half bridge resonance controller 2 and a voltage feedback unit 3.
  • the LLC half-bridge resonance controller 2 includes an input voltage signal detection input terminal VSEN, a voltage output terminal 21, and a voltage feedback input terminal FB.
  • the voltage input circuit unit 1 is electrically connected to the input voltage signal detection input terminal VSEN.
  • the voltage input circuit unit 1 includes a voltage input terminal PFC and a voltage dividing circuit 11 for lowering an undervoltage point of the circuit.
  • the voltage dividing circuit 11 is connected in series between the voltage input terminal PFC and the input voltage signal detecting input terminal VSEN.
  • the voltage dividing circuit 11 includes a first voltage dividing unit 111 and a second voltage dividing unit 112.
  • the first voltage dividing unit 111 is connected in series between the voltage input terminal PFC and the input voltage signal detecting input terminal VSEN for forming a voltage division protection circuit.
  • the first voltage dividing unit 111 may include only one resistor, or may include two or more resistors connected in series, and the resistance values of each resistor are not necessarily equal, or include multiple resistors connected in parallel with each other, or include multiple The resistors are connected in parallel or in series. These are all feasible. The principle is the same, as long as the resistance within a certain range is achieved.
  • the resistance value can be within a range.
  • the range of this resistance is such that the undervoltage point is between 65V and 73V.
  • the first voltage dividing unit 111 includes a first resistor RH72, a second resistor RH62, and a third resistor RH61 which are formed in series with each other and have the same resistance value.
  • the resistance values of the first resistor RH72, the second resistor RH62, and the third resistor RH61 of the first voltage dividing unit 111 are both 2MR, that is, 2M ⁇ .
  • the structure of the first voltage dividing unit 111 is not limited thereto, and the total resistance value of the first voltage dividing unit 111 may be 6MR, and is not limited to the number of resistors and the series or parallel relationship.
  • the second voltage dividing unit 112 is electrically connected between the first voltage dividing unit 111 and the input voltage signal detecting input terminal VSEN, and the other end is grounded, and is mainly used for voltage division to make the power source 10 undervoltage The point is lowered.
  • the second voltage dividing unit 112 is a voltage divider with adjustable resistance value, such as a resistor or other electronic device having a certain resistance value, which is feasible.
  • the resistance value of the second voltage dividing unit 112 ranges from 110KR to 122.4KR.
  • the second voltage dividing unit 112 is a voltage dividing component whose resistance value is adjustable between 110KR and 122.4KR, such as a sliding rheostat RH1.
  • the second voltage dividing unit 112 is a constant value resistor RH104, and the resistance value of the fixed value resistor RH104 may be any value between 110KR and 122.4KR.
  • the second voltage dividing unit 112 is specifically selected as a sliding varistor RH1 having a resistance range of 110KR to 122.4KR.
  • the voltage feedback unit 3 is specifically an optocoupler feedback circuit. One end of the voltage feedback unit 3 is electrically connected to the voltage output terminal 21, and the other end of the voltage feedback unit 3 is electrically connected to the voltage feedback input terminal FB, and forms a feedback circuit to implement overvoltage protection.
  • the resistance values of the second resistor RH62 and the third resistor RH61 are both 2MR, and the second voltage dividing unit 112 is selected as a resistance value of 110KR resistor RH104, and the voltage input terminal When the PFC input voltage is 90V:
  • VSEN [ RH104 / (RH104+RH61+RH62+RH72) ] * PFC
  • the switching power supply 10 with undervoltage protection has an ambient temperature of 0 degrees, and the input voltage of the voltage input terminal PFC is 90V, the switching power supply 10 with undervoltage protection can work normally, and at normal temperature When the PFC input voltage is 90V, the whole machine has no open failure.
  • the resistor RH104 of the second voltage dividing unit 112 is replaced with a sliding varistor RH1 whose resistance value is adjustable, thereby adjusting the voltage division ratio of the input voltage of the voltage input terminal PFC to the node A, thereby implementing the control.
  • the undervoltage point of the switching power supply 10 protected by the undervoltage point.
  • the second voltage dividing unit 112 is replaced with a sliding rheostat RH1 to adjust the resistance to 110KR or more. Then, the voltage of the voltage input terminal PFC is divided to a value of A node to reach its threshold turn-on voltage of 1.3V, and the switching power supply 10 with undervoltage protection or the electronic device using the projector such as a projector is placed indoors. And the temperature is set to 0 degree, the projector plays the video normally, and it works normally for 24 hours, and there is no shutdown state.
  • VSEN [RH1 / (RH1+RH61+RH62+RH72)] * PFC
  • the value of the voltage input terminal PFC is 65V ⁇ 73V, and 65V ⁇ 73V is the undervoltage protection point range of the switching power supply 10 with undervoltage protection.
  • the resistance range of the second voltage dividing unit 112 is preferably 110KR to 122.4KR.
  • the present invention also provides a laser projector (not shown) comprising the above-described switching power supply 10 with undervoltage protection.
  • the switching power supply with undervoltage protection of the present invention increases the design of the voltage input circuit unit to a voltage dividing circuit for reducing the undervoltage point of the circuit, and realizes the voltage dividing circuit through the voltage dividing circuit
  • the undervoltage point of the switching power supply is reduced to below 73V, so that the switching power supply and the laser projector can be normally started under the condition of 0 degree, and the stability is good and the reliability is strong after starting.

Landscapes

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

Abstract

一种具有欠压点保护的开关电源(10)，包括电压输入电路单元(1)、LLC半桥谐振控制器(2)和电压反馈单元(3)；所述LLC半桥谐振控制器(2)包括输入电压信号检测输入端(VSEN)、电压输出端(21)及电压反馈输入端(FB)，所述电压输入电路单元(1)电连接至所述输入电压信号检测输入端(VSEN)，所述电压反馈单元(3)的一端连接于所述电压输出端(21)，其另一端连接至所述电压反馈输入端(FB)并形成反馈电路；所述电压输入电路单元(1)包括电压输入端(PFC)和用于使欠压点降低的分压电路(11)，所述分压电路(11)串联于所述电压输入端(PFC)和所述输入电压信号检测输入端(VSEN)之间。以及一种包括该开关电源（10）的激光投影仪。具有欠压点保护的开关电源(10)和激光投影仪可在0度环境正常启动，欠压点低且启动稳定性好。

Description

具有欠压点保护的开关电源及激光投影机 技术领域
本实用新型属于电源技术领域，具体涉及一种具有欠压点保护的开关电源及激光投影机。
 背景技术
随着智能时代的到来，电子设备成为生活中的一部分，各种电子设备层出不穷，电源则成为电子设备稳定工作的必要元器件，比如激光投影机，以所述激光投影机为例：
目前，相关技术的激光投影机的电源采用LLC半桥谐振控制器对DC-DC转换进行控制，所述电源包括LLC谐振半桥控制器、电压反馈单元和输入电路单元，所述LLC谐振半桥控制器包括输入电压信号检测输入端、电压输出端及电压反馈输入端，所述输入电路单元连接至所述输入电压信号检测输入端，所述电压反馈单元的一端连接于所述电压输出端，另一端连接至所述电压反馈输入端形成反馈电路。
 技术问题
然而，在实际使用过程中，当环境温度为0度时，输入电压（即PFC）为90V时，所述电压信号检测输入端的实际电压值小于其阈值开启电压1.3V，LLC便不能正常启动工作，所述电源开启失败，不能正常工作。从而使得所述电源和运用该电源的激光投影机或其它电子设备稳定性差。
因此，实有必要提供一种新的具有欠压点保护的开关电源及投影仪以解决上述问题。
 技术解决方案
针对以上现有技术的不足，本实用新型提出一种欠压点低且启动稳定性好的具有欠压点保护的开关电源及投影仪。
本实用新型提供一种具有欠压点保护的开关电源，包括电压输入电路单元、LLC半桥谐振控制器和电压反馈单元；所述LLC半桥谐振控制器包括输入电压信号检测输入端、电压输出端及电压反馈输入端，所述电压输入电路单元电连接至所述输入电压信号检测输入端，所述电压反馈单元的一端电连接于所述电压输出端，其另一端电连接至所述电压反馈输入端并形成反馈电路；所述电压输入电路单元包括电压输入端和用于使电路的欠压点降低至73V以下的分压电路，所述分压电路串联于所述电压输入端和所述输入电压信号检测输入端之间。
优选的，所述分压电路包括第一分压单元和第二分压单元，所述第一分压单元串联于所述电压输入端和所述输入电压信号检测输入端之间，所述第二分压单元一端电连接至所述分压电阻单元与所述输入电压信号检测输入端之间，另一端接地。
优选的，所述第一分压单元包括相互形成串联的第一电阻、第二电阻和第三电阻，所述第二分压单元为电阻值可调的分压元器件。
优选的，所述第一电阻、所述第二电阻及所述第三电阻的电阻值均为2MR，所述分压元器件的电阻值范围在110KR~122.4KR之间可调。
优选的，所述分压元器件为滑动变阻器。
优选的，所述分压元器件的电阻值为110KR。
优选的，所述第二分压单元为定值电阻，所述定值电阻的阻值可以为110KR~122.4KR之间的任一值。
优选的，所述第一分压单元的总阻值为6MR。
优选的，所述电压反馈单元为光耦反馈电路。
本实用新型还提供了一种激光投影仪，包括本实用新型提供的上述具有欠压点保护的开关电源。
 有益效果
与相关技术相比，本实用新型的具有欠压点保护的开关电源将所述电压输入电路单元的设计增加用于使电路的欠压点降低的分压电路，通过所述分压电路实现所述开关电源欠压点降低至73V以下，使得所述开关电源和所述激光投影仪可在0度条件下正常启动，稳定性好且可靠性强。
 附图说明
下面结合附图详细说明本实用新型。通过结合以下附图所作的详细描述，本实用新型的上述或其他方面的内容将变得更清楚和更容易理解。附图中：
图1为本实用新型具有欠压点保护的开关电源的结构示意图。
 本发明的最佳实施方式
下面结合附图详细说明本实用新型的具体实施方式。
在此记载的具体实施方式/实施例为本实用新型的特定的具体实施方式，用于说明本实用新型的构思，均是解释性和示例性的，不应解释为对本实用新型实施方式及本实用新型范围的限制。除在此记载的实施例外，本领域技术人员还能够基于本申请权利要求书和说明书所公开的内容采用显而易见的其它技术方案，这些技术方案包括采用对在此记载的实施例的做出任何显而易见的替换和修改的技术方案，都在本实用新型的保护范围之内。
请参阅图1，本实用新型提供了一种具有欠压点保护的开关电源10，包括电压输入电路单元1、LLC半桥谐振控制器2和电压反馈单元3。
所述LLC半桥谐振控制器2包括输入电压信号检测输入端VSEN、电压输出端21及电压反馈输入端FB。
所述电压输入电路单元1电连接至所述输入电压信号检测输入端VSEN。
本实施方式中，所述电压输入电路单元1包括电压输入端PFC和用于使电路的欠压点降低的分压电路11。所述分压电路11串联于所述电压输入端PFC和所述输入电压信号检测输入端VSEN之间。
具体的，所述分压电路11包括第一分压单元111和第二分压单元112。
所述第一分压单元111串联于所述电压输入端PFC和所述输入电压信号检测输入端VSEN之间，用于形成对电路的分压保护。
所述第一分压单元111可以只包括一个电阻，也可以包括串联的两个以上的电阻，而且每个电阻的阻值不一定都相等，或者包括相互并联的多个电阻，又或者包括多个电阻即有并联也有串联形成，这些都是可行的，其原理都一样，只要实现一定范围内的阻值即可。
换言之，只要保证RH104 / (RH104+RH61+RH62+RH72)的阻值在一个范围内即可，这个阻值的范围使得欠压点在65V~73V。
本实施方式中，所述第一分压单元111包括相互形成串联的且电阻值相等的第一电阻RH72、第二电阻RH62和第三电阻RH61。
具体的，所述第一分压单元111的所述第一电阻RH72、所述第二电阻RH62及所述第三电阻RH61的电阻值均为2MR，即2MΩ。当然，所述第一分压单元111的结构并非限于此，只要使所述第一分压单元111总的电阻值为6MR即可，不限于电阻的数量和串联或并联关系。
所述第二分压单元112一端电连接至所述第一分压单元111与所述输入电压信号检测输入端VSEN之间，另一端接地，主要用于分压使所述电源10的欠压点降低。本实施方式中，所述第二分压单元112为电阻值可调的分压器，如电阻或其它具有一定电阻值的电子器件，这都是可行的。
所述第二分压单元112的电阻值范围为110KR~122.4KR。具体的，所述第二分压单元112为电阻值范围在110KR~122.4KR之间可调的分压元器件，比如为一个滑动变阻器RH1。
或者所述第二分压单元112为定值电阻RH104，所述定值电阻RH104的阻值可以为110KR~122.4KR之间的任一值。
本实施方式中，所述第二分压单元112具体选为阻值范围为110KR~122.4KR的滑动变阻器RH1。
所述电压反馈单元3具体为光耦反馈电路。所述电压反馈单元3的一端电连接于所述电压输出端21，所述电压反馈单元3的另一端电连接至所述电压反馈输入端FB，并形成反馈电路，实现过压保护。
以本实施方式的元器件为例，所述第二电阻RH62及所述第三电阻RH61的电阻值均为2MR，第二分压单元112选为阻值为110KR电阻RH104，所述电压输入端PFC输入电压为90V时：
则代入公式得：
VSEN = [ RH104 / (RH104+RH61+RH62+RH72) ] * PFC
可推出电压输入端PFC=72.2V，则该电压为电源输入的欠压点。
经过验证，所述具有欠压点保护的开关电源10在环境温度为0度，电压输入端PFC的输入电压为90V时，所述具有欠压点保护的开关电源10可以正常工作，并且常温时，当PFC输入电压为90V时，整机无开启失败现象。
另外，将所述第二分压单元112的电阻RH104换成阻值可调的滑动变阻器RH1，从而调节所述电压输入端PFC的输入电压到A节点的分压比例，进而实现控制所述具有欠压点保护的开关电源10的欠压点。
比如，将所述第二分压单元112换成滑动变阻器RH1，使其阻值调为110KR或更大, 则所述电压输入端PFC的电压分压到A节点的值将能达到其阈值开启电压1.3V，将所述具有欠压点保护的开关电源10或运用其的电子设备如投影仪放在室内且温度设置为0度，投影仪正常播放视频，正常工作24小时，没有出现关机的状态。
当将所述滑动变阻器RH1阻值变为110KR~122.4KR，所述输入电压信号检测输入端VSEN取值为其阈值下限值（1.3V）时，根据分压原理则有：
VSEN = [RH1 / (RH1+RH61+RH62+RH72)] * PFC
从而推出电压输入端PFC的值为65V~73V，则65V~73V为所述具有欠压点保护的开关电源10的欠压保护点范围。
需要说明的是，当所述第二分压单元112的阻值超过122.4KR后，会使所述具有欠压点保护的开关电源10的欠压点再低于65V，则可能导致部分器件启动不了，因此，所述第二分压单元112的阻值范围优选为110KR~122.4KR。
本实用新型还提供了一种激光投影仪（未图示），所述激光投影仪包括上述的具有欠压点保护的开关电源10。
与相关技术相比，本实用新型的具有欠压点保护的开关电源将所述电压输入电路单元的设计增加用于使电路的欠压点降低的分压电路，通过所述分压电路实现所述开关电源欠压点降低至73V以下，使得所述开关电源和所述激光投影仪可在0度条件下正常启动，启动后稳定性好且可靠性强。
需要说明的是，以上参照附图所描述的各个实施例仅用以说明本实用新型而非限制本实用新型的范围，本领域的普通技术人员应当理解，在不脱离本实用新型的精神和范围的前提下对本实用新型进行的修改或者等同替换，均应涵盖在本实用新型的范围之内。此外，除上下文另有所指外，以单数形式出现的词包括复数形式，反之亦然。另外，除非特别说明，那么任何实施例的全部或一部分可结合任何其它实施例的全部或一部分来使用。

Claims (10)

1、一种具有欠压点保护的开关电源，包括电压输入电路单元、LLC半桥谐振控制器和电压反馈单元；所述LLC半桥谐振控制器包括输入电压信号检测输入端、电压输出端及电压反馈输入端，所述电压输入电路单元电连接至所述输入电压信号检测输入端，所述电压反馈单元的一端电连接于所述电压输出端，其另一端电连接至所述电压反馈输入端并形成反馈电路，其特征在于，所述电压输入电路单元包括电压输入端和用于使电路的欠压点降低至73V以下的分压电路，所述分压电路串联于所述电压输入端和所述输入电压信号检测输入端之间。
2、根据权利要求1所述的具有欠压点保护的开关电源，其特征在于，所述分压电路包括第一分压单元和第二分压单元，所述第一分压单元串联于所述电压输入端和所述输入电压信号检测输入端之间，所述第二分压单元一端电连接至所述分压电阻单元与所述输入电压信号检测输入端之间，另一端接地。
3、根据权利要求2所述的具有欠压点保护的开关电源，其特征在于，所述第一分压单元包括相互形成串联的第一电阻、第二电阻和第三电阻，所述第二分压单元为电阻值可调的分压元器件。
4、根据权利要求3所述的具有欠压点保护的开关电源，其特征在于，所述第一电阻、所述第二电阻及所述第三电阻的电阻值均为2MR，所述分压元器件的电阻值范围在110KR~122.4KR之间可调。
5、根据权利要求3所述的具有欠压点保护的开关电源，其特征在于，所述分压元器件为滑动变阻器。
6、根据权利要求4所述的具有欠压点保护的开关电源，其特征在于，所述分压元器件的电阻值为110KR。
7、根据权利要求2所述的具有欠压点保护的开关电源，其特征在于，所述第二分压单元为定值电阻，所述定值电阻的阻值可以为110KR~122.4KR之间的任一值。
8、根据权利要求7所述的具有欠压点保护的开关电源，其特征在于，所述第一分压单元的总阻值为6MR。
9、根据权利要求1~8任一项所述的具有欠压点保护的开关电源，其特征在于，所述电压反馈单元为光耦反馈电路。
10、一种激光投影仪，其特征在于，包括如权利要求1~9任意一项所述的具有欠压点保护的开关电源。
PCT/CN2017/103445 2017-07-20 2017-09-26 具有欠压点保护的开关电源及激光投影机 WO2019015099A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201720883662.7 2017-07-20
CN201720883662.7U CN207124553U (zh) 2017-07-20 2017-07-20 具有欠压点保护的开关电源及激光投影机

Publications (1)

Publication Number Publication Date
WO2019015099A1 true WO2019015099A1 (zh) 2019-01-24

Family

ID=61612851

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/103445 WO2019015099A1 (zh) 2017-07-20 2017-09-26 具有欠压点保护的开关电源及激光投影机

Country Status (2)

Country Link
CN (1) CN207124553U (zh)
WO (1) WO2019015099A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112736843A (zh) * 2020-12-30 2021-04-30 珠海拓芯科技有限公司 开关电源过欠压保护电路、开关电源及空调器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116345642A (zh) * 2023-05-24 2023-06-27 深圳市驰普科达科技有限公司 电池欠压保护点设定方法及其系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102130600A (zh) * 2011-03-28 2011-07-20 张家港华峰电接插元件有限公司 一种串联谐振开关电源
CN102355147A (zh) * 2011-10-28 2012-02-15 上海大学 数字化 llc同步整流谐振变换器控制装置和方法
CN103025009A (zh) * 2012-11-29 2013-04-03 余姚亿威电子科技有限公司 一种led驱动控制电路
CN103220868A (zh) * 2013-05-08 2013-07-24 四川创境科技有限公司 一种大功率led开关电源
CN103701337A (zh) * 2014-01-16 2014-04-02 青岛歌尔声学科技有限公司 一种电源系统

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102130600A (zh) * 2011-03-28 2011-07-20 张家港华峰电接插元件有限公司 一种串联谐振开关电源
CN102355147A (zh) * 2011-10-28 2012-02-15 上海大学 数字化 llc同步整流谐振变换器控制装置和方法
CN103025009A (zh) * 2012-11-29 2013-04-03 余姚亿威电子科技有限公司 一种led驱动控制电路
CN103220868A (zh) * 2013-05-08 2013-07-24 四川创境科技有限公司 一种大功率led开关电源
CN103701337A (zh) * 2014-01-16 2014-04-02 青岛歌尔声学科技有限公司 一种电源系统

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112736843A (zh) * 2020-12-30 2021-04-30 珠海拓芯科技有限公司 开关电源过欠压保护电路、开关电源及空调器

Also Published As

Publication number Publication date
CN207124553U (zh) 2018-03-20

Similar Documents

Publication Publication Date Title
TWI387194B (zh) 減少返馳式電源轉換器之待機功耗的裝置及方法
WO2015113341A1 (zh) 电子设备充电装置及其电源适配器
WO2012022088A1 (zh) 电流反馈电路及led灯驱动电路
WO2017076006A1 (zh) 恒压恒流同步输出电源及电视机
WO2013138972A1 (zh) 一种带功率补偿的led驱动芯片及电路
WO2015006963A1 (zh) 一种led背光系统及显示装置
WO2014094648A1 (zh) 一种分体式led灯具及其驱动电源插拔保护电路
WO2015113342A1 (zh) 电子设备及其电源适配器
WO2016026416A1 (zh) 低压差线性稳压器电路、芯片和电子设备
WO2013067957A1 (zh) 一种应用于功率因数校正器中的输出过压保护电路
WO2018227965A1 (zh) 供电装置和照明系统
WO2015074288A1 (zh) Led背光驱动电路以及液晶显示器
WO2014154091A1 (zh) 一种恒流驱动控制器及led恒流驱动电路
WO2019015099A1 (zh) 具有欠压点保护的开关电源及激光投影机
WO2013117027A1 (zh) 电池均衡电路
CN102005718A (zh) 一种用于电子负载的保护装置及电子负载系统
WO2012100406A1 (zh) 一种低压控制电源电路及其产生方法
CN109193914A (zh) 一种冗余电源智能控制装置
WO2015135319A1 (en) Led power circuit using discrete components and configuration method
CN106664026A (zh) 适于不同功率模式的电源单元
US20150177290A1 (en) Controller for automatically detecting the maximal operating current of light sources and detection method thereof
WO2014107926A1 (zh) Led驱动电路
CN104080228B (zh) 灯具电参量的检测控制电路
WO2016090544A1 (zh) 原边反馈恒流电源及其电流调节电路
CN205429707U (zh) 一种微功耗宽范围电池欠压报警电路

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17918205

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17918205

Country of ref document: EP

Kind code of ref document: A1