WO2015070492A1 - 一种恒流电源开环打嗝保护线路 - Google Patents

一种恒流电源开环打嗝保护线路 Download PDF

Info

Publication number
WO2015070492A1
WO2015070492A1 PCT/CN2013/088237 CN2013088237W WO2015070492A1 WO 2015070492 A1 WO2015070492 A1 WO 2015070492A1 CN 2013088237 W CN2013088237 W CN 2013088237W WO 2015070492 A1 WO2015070492 A1 WO 2015070492A1
Authority
WO
WIPO (PCT)
Prior art keywords
power supply
resistor
capacitor
loop
diode
Prior art date
Application number
PCT/CN2013/088237
Other languages
English (en)
French (fr)
Inventor
许国伟
黄鹤鸣
肖灵
Original Assignee
深圳市东方之星电源有限公司
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 深圳市东方之星电源有限公司 filed Critical 深圳市东方之星电源有限公司
Publication of WO2015070492A1 publication Critical patent/WO2015070492A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • 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
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • the invention relates to the technical field of electronic lighting, in particular to a constant current power supply open-loop snoring protection circuit.
  • LED driving power supply is an important part of LED lighting, and its technology is developing rapidly.
  • countries have introduced relevant power safety standards, among which safety and fire risk, it is required to do the destructive experiment of the corresponding lamps, the power can not smoke and fire.
  • the LED driving power supply is generally driven by a constant current source.
  • the driving power supply loses loop feedback, and the output current is several times larger than the rated current; in this case, if there is no protection, it may be The appearance of power components and fires caused the failure to pass the safety test certification, resulting in the LED lamps not working properly.
  • a constant current power supply open-loop snagging protection circuit mainly comprises a driving IC, a plurality of resistors, a plurality of capacitors, a diode, a triode and a high-frequency transformer; wherein the anode of the eleventh diode (D11) is connected to a high-frequency transformer
  • the cathode is connected to one end of the 51st resistor (R51), and the other end of the 51st resistor (R51) is connected to one end of the 51st capacitor (C51) and the 52nd resistor (R52);
  • the other end of the resistor (R52) is simultaneously connected to the C pole of the second transistor (Q2), the anode of the 12th diode (D12), and one end of the 52nd capacitor (C52);
  • the cathode of the 12th diode (D12) is connected to the driving IC
  • the first leg of (U1); the other end of the 52nd capacitor (C52) is simultaneously connected to
  • the second triode (Q2) is an NPN triode.
  • the driving IC (U1) may adopt the SA7525 or the SN03A.
  • the constant current power supply open-loop snoring protection circuit provided by the present invention has the beneficial effects:
  • the circuit is simple, so that the production process is simple, the production efficiency is improved, and the production cost is reduced.
  • Figure 1 is a simplified diagram of a drive power supply without an open loop tamper protection circuit.
  • FIG. 2 is a schematic diagram of the open loop tamper protection circuit of the present invention.
  • U1 driver IC
  • U3B optocoupler secondary
  • T1 high frequency transformer
  • D11 11th diode
  • D12 12th diode
  • R52: 52nd resistor R53: 53 resistance
  • Q2 2rd transistor.
  • the utility model provides a constant current power supply open-loop snagging protection circuit, comprising: a driving IC (U1), an optocoupler secondary (U3B), a high frequency transformer (T1), and an eleventh diode. (D11), 12th diode (D12), 51st resistor (R51), 52nd resistor (R52), 53rd resistor (R53), 51st capacitor (C51), 52nd capacitor (C52), 53rd capacitor ( C53), the second triode (Q2).
  • the anode of the eleventh diode (D11) is connected to the fourth leg of the high-frequency transformer (T1), the cathode is connected to one end of the 51st resistor (R51), and the other end of the 51st resistor (R51) is connected.
  • One end of 51 capacitor (C51) and 52nd resistor (R52); the other end of the 52nd resistor (R52) is connected to the C pole of the second transistor (Q2), the anode of the 12th diode (D12), and the 52nd capacitor.
  • One end of (C52), the cathode of the twelfth diode (D12) is connected to the first leg of the driving IC (U1); the other end of the 52nd capacitor (C52) is simultaneously connected to the other end of the 51st capacitor (C51), One end of the second transistor (Q2) and one end of the 53rd capacitor (C53); the other end of the 53rd capacitor (C53) is connected to the B pole of the second transistor (Q2) and one end of the 53rd resistor (R53). The other end of the 53rd resistor (R53) is connected to the third leg of the driver IC (U1).
  • the second transistor (Q2) is an NPN transistor
  • the driving IC (U1) is a chip of the same type as the L6562, such as SA7525, SN03A, or the like.
  • the current of the optocoupler secondary (U3B) varies as the voltage output changes.
  • the optocoupler secondary (U3B) When the optocoupler secondary (U3B) is working normally, the optocoupler secondary (U3B) has current through; when the optocoupler secondary (U3B) fails open (or when the optocoupler secondary (U3B) is shorted), light
  • the voltage at the junction of the 53rd resistor (R53) and the driver IC (U1) becomes lower, and the B-pole potential of the second transistor (Q2) becomes lower, and the second transistor ( Q2) Turn-on is turned off, and the C-pole power supply of the second transistor (Q2) is composed of the 11th diode (D11), the 51st resistor (R51), and the 51st capacitor (C51), and the second transistor (Q2) is C.
  • the pole becomes high and is poured into the driver IC (U1) through the 12th diode (D12) and fed back; when the cathode of the 12th diode (D12) and the first pin of the driver IC (U1) become higher After the level, the feedback is saturated and the voltage stops working.
  • the 51st capacitor (C51), the 52nd capacitor (C52), and the 53rd capacitor (C53) are discharged through the resistor connected thereto; when the power is discharged, the cathode of the 12th diode (D12)
  • the level of the connection point of the first pin of the driver IC (U1) becomes low, and the power supply is restarted.
  • the photocoupler secondary (U3B) is faulty, the power supply works normally. If the fault exists, the power supply continues to perform the protection action. Going down, there is a state of snoring protection.
  • the above principle can effectively protect the driving power source from being burnt and smoke, and at the same time ensure that the driving power source passes various experimental tests and successfully pass the safety test certification to further ensure the normal operation of the LED lamp.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

公开了一种恒流电源开环打嗝保护线路，属于电子照明技术领域。二极管一端连接高频变压器，另一端通过电阻连接三极管；所述三极管通过电阻连接驱动IC；还包括若干电容与之相接的电阻。能有效保护驱动电源不会被烧坏冒烟，同时确保驱动电源通过各项实验测试，顺利通过安规测试认证，进一步确保LED灯具正常工作；同时线路简单从而形成生产工艺简单，提高了生产效率，降低了生产成本。

Description

一种恒流电源开环打嗝保护线路 技术领域
本发明涉及电子照明技术领域，特别涉及一种恒流电源开环打嗝保护线路。
 背景技术
随着LED灯具技术的快速发展与应用日益成熟，LED驱动电源作为LED灯具能够发光显示的重要部分，其技术发展迅猛。在加上各国纷纷出台相关的电源安规标准，其中安全性和起火风险，便是要求相应的灯具做破坏性实验，电源不能冒烟起火。
目前LED驱动电源一般采用恒流源驱动，当进行光耦短路/开路实验时，驱动电源失去环路反馈，输出电流会比额定电流大几倍；在这种情况下，如无保护，可能会出现电源零部件起火昌烟，导致无法通过安规实验认证，致使LED灯具无法正常工作。
 技术问题
为了解决上述现有的技术不足与缺陷，本发明的目的在于提供一种恒流电源开环打嗝保护线路。
 技术解决方案
本发明的目的是通过采用以下技术方案来实现的：
一种恒流电源开环打嗝保护线路，主要包括驱动IC、若干个电阻、若干个电容、二极管、三极管和高频变压器；其特征在于：所述第11二极管（D11）的阳极连接高频变压器（T1）的第4脚，其阴极连接第51电阻（R51）的一端，第51电阻（R51）的另一端连接第51电容（C51）、第52电阻（R52）的一端；所述第52电阻（R52）的另一端同时连接第2三极管（Q2）的C极、第12二极管（D12）的阳极、第52电容（C52）的一端；所述第12二极管（D12）的阴极连接驱动IC（U1）的第1脚；所述第52电容（C52）的另一端同时连接第51电容（C51）的另一端、第2三极管（Q2）的E极、第53电容（C53）的一端；所述第53电容（C53）的另一端连接第2三极管（Q2）的B极、第53电阻（R53）的一端，第53电阻（R53）的另一端接驱动IC（U1）的第3脚。
作为本发明可选技术方案，所述第2三极管（Q2）为NPN三极管。
作为本发明可选技术方案，所述驱动IC（U1）可以采用SA7525，也可以采用SN03A。
 有益效果
综上所述，本发明所提供的恒流电源开环打嗝保护线路，具有的有益效果：
1、有效保护驱动电源不会被烧坏冒烟，进一步确保LED灯具正常工作。
2、确保驱动电源通过各项实验测试，顺利通过安规测试认证。
3、线路简单从而形成生产工艺简单，提高了生产效率，降低了生产成本。
 附图说明
图1为未增加开环打嗝保护线路的驱动电源简图。
图2为本发明开环打嗝保护线路的原理图。
附图标记说明：U1：驱动IC；U3B：光耦次级；T1：高频变压器；D11：第11二极管；D12：第12二极管；R51：第51电阻；R52：第52电阻；R53：第53电阻；C51：第51电容；C52：第52电容；C53：第53电容；Q2：第2三极管。
 本发明的实施方式
下面通过实施例并结合附图，对本发明的技术方案作进一步详细的说明。下述参照附图对本发明实施方式的说明旨在对本发明的总体发明构思进行解释，而不应当理解为对本发明的一种限制。
参照图1和图2所示，本实用新型提供一种恒流电源开环打嗝保护线路，包括：驱动IC（U1），光耦次级（U3B），高频变压器（T1），第11二极管（D11），第12二极管（D12），第51电阻（R51），第52电阻（R52），第53电阻（R53），第51电容（C51），第52电容（C52），第53电容（C53），第2三极管（Q2）。
在本发明中，所述第11二极管（D11）的阳极连接高频变压器（T1）的第4脚，其阴极连接第51电阻（R51）的一端，第51电阻（R51）的另一端连接第51电容（C51）、第52电阻（R52）的一端；所述第52电阻（R52）的另一端同时连接第2三极管（Q2）的C极、第12二极管（D12）的阳极、第52电容（C52）的一端，所述第12二极管（D12）的阴极连接驱动IC（U1）的第1脚；所述第52电容（C52）的另一端同时连接第51电容（C51）的另一端、第2三极管（Q2）的E极、第53电容（C53）的一端；所述第53电容（C53）的另一端连接第2三极管（Q2）的B极、第53电阻（R53）的一端，第53电阻（R53）的另一端接驱动IC（U1）的第3脚。
在上述中，所述第2三极管（Q2）为NPN三极管，所述驱动IC（U1）为L6562同类型芯片，如SA7525， SN03A等。
在本发明中，所述光耦次级（U3B）的电流随着电压输出变化而变化。当光耦次级（U3B）正常工作时，光耦次级（U3B）有电流通过；当光耦次级（U3B）失效开路时（或光耦次级（U3B）原边短路时），光耦次级（U3B）上无电流通过，此时第53电阻（R53）与驱动IC（U1）的连接点的电压变低，第2三极管（Q2）的B极电位变低，第2三极管（Q2）有导通变为截止，第2三极管（Q2）的C极供电由第11二极管（D11）、第51电阻（R51）和第51电容（C51）组成，第2三极管（Q2）的C极变为高电平，并通过第12二极管（D12）灌注到驱动IC（U1）并反馈；当第12二极管（D12）的阴极与驱动IC（U1）的第1脚的连接点的变高电平后，反馈饱和，电压停止工作。当电源停止工作后，第51电容（C51）、第52电容（C52）、第53电容（C53）通过与之相接的电阻放电；当电放完后，第12二极管（D12）的阴极与驱动IC（U1）的第1脚的连接点的电平变低，电源重新启动，此时如果光耦次级（U3B）故障解决，电源正常工作，如果故障存在，电源继续进行保护动作，往复下去，出现打嗝保护状态。
在本发明中，利用上述原理能有效保护驱动电源不会被烧坏冒烟，同时确保驱动电源通过各项实验测试，顺利通过安规测试认证，进一步确保LED灯具正常工作。
以上所述实施例仅表达了本发明的优选实施方式，其描述较为具体与详细，但并不能因此而理解为对本发明专利范围和实施例的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。

Claims (3)

  1. 一种恒流电源开环打嗝保护线路，主要包括驱动IC、若干个电阻、若干个电容、二极管、三极管和高频变压器；其特征在于：
    所述第11二极管（D11）的阳极连接高频变压器（T1）的第4脚，其阴极连接第51电阻（R51）的一端，第51电阻（R51）的另一端连接第51电容（C51）、第52电阻（R52）的一端；
    所述第52电阻（R52）的另一端同时连接第2三极管（Q2）的C极、第12二极管(D12)的阳极、第52电容（C52）的一端；
    所述第12二极管（D12）的阴极连接驱动IC（U1）的第1脚；
    所述第52电容（C52）的另一端同时连接第51电容（C51）的另一端、第2三极管（Q2）的E极、第53电容（C53）的一端；
    所述第53电容（C53）的另一端连接第2三极管（Q2）的B极、第53电阻（R53）的一端，第53电阻（R53）的另一端接驱动IC（U1）的第3脚。
  2. 根据权利要求1所述的恒流电源开环打嗝保护线路，其特征在于，所述第2三极管（Q2）为NPN三极管。
  3. 根据权利要求1所述的恒流电源开环打嗝保护线路，其特征在于，所述驱动IC（U1）可以采用SA7525，也可以采用SN03A。
PCT/CN2013/088237 2013-11-13 2013-11-29 一种恒流电源开环打嗝保护线路 WO2015070492A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310571178.7 2013-11-13
CN201310571178.7A CN103582207A (zh) 2013-11-13 2013-11-13 一种恒流电源开环打嗝保护线路

Publications (1)

Publication Number Publication Date
WO2015070492A1 true WO2015070492A1 (zh) 2015-05-21

Family

ID=50052837

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/088237 WO2015070492A1 (zh) 2013-11-13 2013-11-29 一种恒流电源开环打嗝保护线路

Country Status (2)

Country Link
CN (1) CN103582207A (zh)
WO (1) WO2015070492A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112866048A (zh) * 2019-11-28 2021-05-28 中盈优创资讯科技有限公司 物联网专线的检测方法及装置
CN112994430A (zh) * 2021-02-26 2021-06-18 西安微电子技术研究所 一种多模式组合的短路保护线路及其工作方法和应用
CN115995791A (zh) * 2023-02-22 2023-04-21 广东东菱电源科技有限公司 一种短路保护自恢复电路

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2402005A (en) * 2001-12-03 2004-11-24 Murata Manufacturing Co Switching power supply
CN2882068Y (zh) * 2006-01-13 2007-03-21 北京动力源科技股份有限公司 开关电源打嗝保护电路
CN201178507Y (zh) * 2008-04-14 2009-01-07 曹型勇 发光二极管交通灯恒流自动调光电源
CN102969883A (zh) * 2012-12-07 2013-03-13 深圳市核达中远通电源技术有限公司 一种开关电源打嗝保护及延时保护电路
CN203590516U (zh) * 2013-11-13 2014-05-07 深圳市东方之星电源有限公司 一种恒流电源开环打嗝保护线路

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2402005A (en) * 2001-12-03 2004-11-24 Murata Manufacturing Co Switching power supply
CN2882068Y (zh) * 2006-01-13 2007-03-21 北京动力源科技股份有限公司 开关电源打嗝保护电路
CN201178507Y (zh) * 2008-04-14 2009-01-07 曹型勇 发光二极管交通灯恒流自动调光电源
CN102969883A (zh) * 2012-12-07 2013-03-13 深圳市核达中远通电源技术有限公司 一种开关电源打嗝保护及延时保护电路
CN203590516U (zh) * 2013-11-13 2014-05-07 深圳市东方之星电源有限公司 一种恒流电源开环打嗝保护线路

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112866048A (zh) * 2019-11-28 2021-05-28 中盈优创资讯科技有限公司 物联网专线的检测方法及装置
CN112866048B (zh) * 2019-11-28 2023-04-28 中盈优创资讯科技有限公司 物联网专线的检测方法及装置
CN112994430A (zh) * 2021-02-26 2021-06-18 西安微电子技术研究所 一种多模式组合的短路保护线路及其工作方法和应用
CN115995791A (zh) * 2023-02-22 2023-04-21 广东东菱电源科技有限公司 一种短路保护自恢复电路
CN115995791B (zh) * 2023-02-22 2023-09-15 广东东菱电源科技有限公司 一种短路保护自恢复电路

Also Published As

Publication number Publication date
CN103582207A (zh) 2014-02-12

Similar Documents

Publication Publication Date Title
WO2015070492A1 (zh) 一种恒流电源开环打嗝保护线路
WO2011160319A1 (zh) 一种led灯故障处理方法、led驱动器及led灯
CN203734532U (zh) 用于led驱动器的斩波功能电路
CN107197568A (zh) Led智能灯的驱动电源系统
WO2016090544A1 (zh) 原边反馈恒流电源及其电流调节电路
CN201039531Y (zh) Led变压驱动电路
CN205160843U (zh) 一种反激式led调光驱动电路
WO2015043052A1 (zh) 一种单级pfc反激电源输入欠压保护线路
CN105140997A (zh) 智能交通系统的智能灯具充电器
CN201496907U (zh) 一种具有智能温控电路的led路灯
CN204259223U (zh) 节能照明系统
CN208258133U (zh) 一种新型机床节能照明灯
CN203590516U (zh) 一种恒流电源开环打嗝保护线路
CN202043352U (zh) 一种小功率反激回路led驱动电源
CN201986248U (zh) 347v高电压输入的1000w电子镇流器
CN204967343U (zh) 智能交通系统的智能灯具充电器
CN205546040U (zh) 一种自动调压led控制电路
WO2020062818A1 (zh) 一种提高电源启动时间的电路及驱动电源
CN203387749U (zh) 一种mos故障保护线路
CN108575006A (zh) 一种cob封装的led光源
CN104093234A (zh) 一种大功率led灯调光控制系统
CN104320895B (zh) 节能照明系统
CN203984710U (zh) 一种开路保护电路及具有该开路保护电路的照明系统
CN202733831U (zh) 一种格栅灯的电路连接结构
AU2017100300A4 (en) Two-Way Two-Line Light Control Circuit

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: 13897421

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 14.10.2016)

122 Ep: pct application non-entry in european phase

Ref document number: 13897421

Country of ref document: EP

Kind code of ref document: A1