CN110474290A - 一种简洁实用可自动恢复的输入过压保护电路 - Google Patents
一种简洁实用可自动恢复的输入过压保护电路 Download PDFInfo
- Publication number
- CN110474290A CN110474290A CN201910885121.1A CN201910885121A CN110474290A CN 110474290 A CN110474290 A CN 110474290A CN 201910885121 A CN201910885121 A CN 201910885121A CN 110474290 A CN110474290 A CN 110474290A
- Authority
- CN
- China
- Prior art keywords
- resistance
- semiconductor
- oxide
- voltage
- capacitor
- 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.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 28
- 239000004065 semiconductor Substances 0.000 claims abstract description 22
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
- H02H7/1222—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to abnormalities in the input circuit, e.g. transients in the DC input
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
- H02H7/1252—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers responsive to overvoltage in input or output, e.g. by load dump
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
Abstract
本发明公开了一种简洁实用可自动恢复的输入过压保护电路，包括电阻R1、电阻R2、电阻R3、电阻R4、电阻R5、电阻R6、极性电容C1、电容C2以及MOS管Q1；MOS管Q1的D极分别连接正电压VCC、电阻R2的一端，电阻R2的另一端连接电阻R1的一端，电阻R1的另一端分别连接信号输入端VIN、电阻R3的一端，电阻R3的另一端连接电阻R4的一端，电阻R4的另一端分别连接MOS管Q1的G极、电阻R5的一端、电容C2的一端，电容C2的另一端分别连接电阻R5的另一端、电阻R6的一端、极性电容C1的负极，极性电容C1的负极接地，极性电容C1的正极连接MOS管Q1的D极，电阻R6的另一端连接MOS管Q1的S极。本发明简洁实用，对输入端进行过压保护。
Description
技术领域
本发明涉及电路设计技术领域，具体涉及一种简洁实用可自动恢复的输入过压保护电路。
背景技术
目前现在通用电源IC方案，因输入端有明确的使用电压范围，都只是对输出端的电压做过压或者欠压保护，无输入电压保护功能。
目前电源方案大多依赖于IC自带的检测脚电压做过压保护，而反激式电源、变压器反馈绕组都是跟次级同向，只能做输出电压的过压保护，无输入过压保护。
在印度、非洲等一些国家，输入市电非常不稳，经常有超过额定电压而造成电源损坏。
而雷击浪涌加到输入端时，输入电压过高，产品防雷弱的电源，也经常会被损坏。
发明内容
有鉴于此，为了解决现有技术中的上述问题，本发明提出一种简洁实用可自动恢复的输入过压保护电路。
本发明通过以下技术手段解决上述问题：
一种简洁实用可自动恢复的输入过压保护电路，包括电阻R1、电阻R2、电阻R3、电阻R4、电阻R5、电阻R6、极性电容C1、电容C2以及MOS管Q1；
MOS管Q1的D极分别连接正电压VCC、电阻R2的一端，电阻R2的另一端连接电阻R1的一端，电阻R1的另一端分别连接信号输入端VIN、电阻R3的一端，电阻R3的另一端连接电阻R4的一端，电阻R4的另一端分别连接MOS管Q1的G极、电阻R5的一端、电容C2的一端，电容C2的另一端分别连接电阻R5的另一端、电阻R6的一端、极性电容C1的负极，极性电容C1的负极接地，极性电容C1的正极连接MOS管Q1的D极，电阻R6的另一端连接MOS管Q1的S极。
进一步地，MOS管Q1型号为2N7002。
与现有技术相比，本发明的有益效果至少包括：
本发明简洁实用，对输入端进行过压保护，排除终端使用时、输入电压高于额定范围在一定范围内、而引起产品的损坏和可能出现的火灾。应用在LED驱动/适配器/工业电源等电源类产品。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明简洁实用可自动恢复的输入过压保护电路的电路原理图。
具体实施方式
为使本发明的上述目的、特征和优点能够更加明显易懂，下面将结合附图和具体的实施例对本发明的技术方案进行详细说明。需要指出的是，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例，基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例
如图1所示，本发明提供一种简洁实用可自动恢复的输入过压保护电路，包括电阻R1、电阻R2、电阻R3、电阻R4、电阻R5、电阻R6、极性电容C1、电容C2以及MOS管Q1；
MOS管Q1的D极分别连接正电压VCC、电阻R2的一端，电阻R2的另一端连接电阻R1的一端，电阻R1的另一端分别连接信号输入端VIN、电阻R3的一端，电阻R3的另一端连接电阻R4的一端，电阻R4的另一端分别连接MOS管Q1的G极、电阻R5的一端、电容C2的一端，电容C2的另一端分别连接电阻R5的另一端、电阻R6的一端、极性电容C1的负极，极性电容C1的负极接地，极性电容C1的正极连接MOS管Q1的D极，电阻R6的另一端连接MOS管Q1的S极。
本实施例中，MOS管Q1型号为2N7002。
PCB LAYOUT时，本发明增加一个2N7002MOS管，以及外围几个SMD电阻电容即可。一般正常的电源IC都会有供电的VCC电路，启动的部分都是通过用两个电阻接VIN,本发明电路采用的原理是：通过R3、R4、R5对输入电压VIN做取样，当R5上的电压VR5达到Q1的开启电压的时候，让Q1导通，VCC电压将会被R6拉掉，IC也将无驱动电压输出，功率MOS处于断开状态，产品进入保护状态，只要在输入端元器件耐压范围内，产品都将保护而不损坏。输入电压恢复到正常范围时，VR5电压低于Q1开启电压，Q1断开，VCC恢复正常，产品正常输出。
本发明简洁实用，对输入端进行过压保护，排除终端使用时、输入电压高于额定范围在一定范围内、而引起产品的损坏和可能出现的火灾。应用在LED驱动/适配器/工业电源等电源类产品。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。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。因此，本发明专利的保护范围应以所附权利要求为准。
Claims (2)
1.一种简洁实用可自动恢复的输入过压保护电路，其特征在于，包括电阻R1、电阻R2、电阻R3、电阻R4、电阻R5、电阻R6、极性电容C1、电容C2以及MOS管Q1；
MOS管Q1的D极分别连接正电压VCC、电阻R2的一端，电阻R2的另一端连接电阻R1的一端，电阻R1的另一端分别连接信号输入端VIN、电阻R3的一端，电阻R3的另一端连接电阻R4的一端，电阻R4的另一端分别连接MOS管Q1的G极、电阻R5的一端、电容C2的一端，电容C2的另一端分别连接电阻R5的另一端、电阻R6的一端、极性电容C1的负极，极性电容C1的负极接地，极性电容C1的正极连接MOS管Q1的D极，电阻R6的另一端连接MOS管Q1的S极。
2.根据权利要求1所述的简洁实用可自动恢复的输入过压保护电路，其特征在于，MOS管Q1型号为2N7002。
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920793560 | 2019-05-29 | ||
| CN2019207935605 | 2019-05-29 | ||
| CN201910458557 | 2019-05-29 | ||
| CN2019104585572 | 2019-05-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110474290A true CN110474290A (zh) | 2019-11-19 |
Family
ID=68516221
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921558606.1U Active CN210693431U (zh) | 2019-05-29 | 2019-09-19 | 一种简洁实用可自动恢复的输入过压保护电路 |
| CN201910885121.1A Pending CN110474290A (zh) | 2019-05-29 | 2019-09-19 | 一种简洁实用可自动恢复的输入过压保护电路 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921558606.1U Active CN210693431U (zh) | 2019-05-29 | 2019-09-19 | 一种简洁实用可自动恢复的输入过压保护电路 |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN210693431U (zh) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210693431U (zh) * | 2019-05-29 | 2020-06-05 | 广东明丰电源电器实业有限公司 | 一种简洁实用可自动恢复的输入过压保护电路 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205141657U (zh) * | 2015-11-05 | 2016-04-06 | 广州金升阳科技有限公司 | 输入过压保护电路 |
| CN210693431U (zh) * | 2019-05-29 | 2020-06-05 | 广东明丰电源电器实业有限公司 | 一种简洁实用可自动恢复的输入过压保护电路 |
-
2019
- 2019-09-19 CN CN201921558606.1U patent/CN210693431U/zh active Active
- 2019-09-19 CN CN201910885121.1A patent/CN110474290A/zh active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205141657U (zh) * | 2015-11-05 | 2016-04-06 | 广州金升阳科技有限公司 | 输入过压保护电路 |
| CN210693431U (zh) * | 2019-05-29 | 2020-06-05 | 广东明丰电源电器实业有限公司 | 一种简洁实用可自动恢复的输入过压保护电路 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN210693431U (zh) | 2020-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8022640B2 (en) | Electronic power protection circuit and applications thereof | |
| CN103715659B (zh) | 车载电源保护电路 | |
| CN105826894B (zh) | 电源设备的充电短路保护装置和电源设备 | |
| CN105633905A (zh) | 过压欠压保护电路 | |
| EP2672597A1 (en) | Voltage rectifier | |
| CN105262057A (zh) | Pmic的保护电路、显示面板及显示装置 | |
| CN105391320B (zh) | 多相电源电路 | |
| CN110474290A (zh) | 一种简洁实用可自动恢复的输入过压保护电路 | |
| CN102882181B (zh) | 一种基于双向可控硅的反接保护及过压保护电路 | |
| CN104377647A (zh) | 漏电保护电路 | |
| CN105703345A (zh) | Usb静电防护电路 | |
| CN207652028U (zh) | 一种开关电源电路及其保护电路 | |
| CN110492434A (zh) | 一种简洁实用可自动恢复的欠压保护电路 | |
| CN106019170A (zh) | 一种电源适配器检测装置 | |
| CN111049101A (zh) | 过压保护电路 | |
| CN211856719U (zh) | 一种静电泄放及过压保护预警装置、服务器连接系统 | |
| CN214412262U (zh) | 保护电路、电路板及保护系统 | |
| CN202977969U (zh) | 一种激光器耦合电源的高效保护电路 | |
| CN208046223U (zh) | 直流电源及其输出保护电路 | |
| CN206533129U (zh) | 一种用于电子设备rs485接口的防雷保护电路 | |
| CN205811851U (zh) | 一种直流电源输入电路模块 | |
| CN215221727U (zh) | 信号浪涌保护电路以及浪涌保护器 | |
| CN104502646A (zh) | 一种移动终端测试夹具保护装置 | |
| CN214480660U (zh) | 网络通讯设备及其poe网络电源 | |
| CN216489762U (zh) | 一种接口保护电路及移动设备 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |