CN206412928U - A kind of thermal-shutdown circuit for carrying return difference - Google Patents
A kind of thermal-shutdown circuit for carrying return difference Download PDFInfo
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- CN206412928U CN206412928U CN201621435573.8U CN201621435573U CN206412928U CN 206412928 U CN206412928 U CN 206412928U CN 201621435573 U CN201621435573 U CN 201621435573U CN 206412928 U CN206412928 U CN 206412928U
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Abstract
The utility model provides a kind of thermal-shutdown circuit for carrying return difference, the utility model includes input rectifying filter circuit in structure, DC DC circuits, output rectifier and filter, temperature sensing circuit, power-supplying circuit, protection circuit, power management control circuit and feedback circuit, wherein, the DC DC are electrically connected between the input rectifying filter circuit and the output rectifier and filter, the power-supplying circuit is connected between the DC DC circuits and the power management control circuit, the temperature sensing circuit is connected between the power-supplying circuit and the protection circuit, the power management control circuit is connected between the protection circuit and the feedback circuit, the feedback circuit is connected with the output rectifier and filter.It uses thermistor to do temperature detection, and small volume cost is low, is powered and is protected using the control circuit of main circuit itself, simple in construction, there is less number of components.
Description
Technical field
The utility model is related to a kind of thermal-shutdown circuit for carrying return difference.
Background technology
At present due to LED energy-conserving and environment-protective, the advantages of service life is long, increasing indoor and outdoor lighting uses LED
Lighting engineering, the volume of LED drivings is also with the miniaturization developed slowly.But the heat problem caused is minimized always all to exist,
It is annual because the mistakes cause thermal damage LED that improper use or Rig up error are caused drives more not within minority, therefore most driver
In have overheat protector function.Traditional driving thermal-shutdown circuit mostly uses PTC or temperature switch, the former low precision,
And there is no temperature return difference in protection, protection is incomplete, and the latter's volume is big and cost is higher.Therefore a kind of new mistake is needed
Warm protection circuit.
Utility model content
Main purpose of the present utility model is a kind of thermal-shutdown circuit for carrying return difference of offer, and it uses thermistor
Temperature detection is done, small volume cost is low, power and protect using the control circuit of main circuit itself, it is simple in construction, have less
Number of components, temperature return difference when providing overheat protector by diode itself pressure drop in its protection circuit, it is ensured that after overheat protector
Main circuit can just work after temperature drop, driver is not operated in the environment of high temperature.
The technical solution adopted in the utility model is：A kind of thermal-shutdown circuit for carrying return difference, including input rectifying filter
Wave circuit, DC-DC circuit, output rectifier and filter, temperature sensing circuit, power-supplying circuit, protection circuit, power management
Circuit and feedback circuit are controlled, wherein, the DC-DC circuit is connected to the input rectifying filter circuit and the output rectification filter
Between circuit, the power-supplying circuit is connected between the DC-DC circuit and the power management control circuit, temperature detection electricity
Road is connected between the power-supplying circuit and the protection circuit, and the power management control circuit is connected to the protection circuit with being somebody's turn to do
Between feedback circuit, the feedback circuit is connected with the output rectifier and filter.
The protection circuit include heat sensitive electronic, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance,
6th resistance, diode, electric capacity and FET, wherein, the heat sensitive electronic is concatenated with first resistor, second resistance, and this two
Pole pipe is concatenated with the 5th resistance, FET, and the 6th resistance is connected with the FET, and the 3rd resistor is connected to two pole
Between pipe and second resistance, the electric capacity is connected in parallel between the 5th resistance and the 3rd resistor.
The beneficial effects of the utility model are：The utility model includes input rectifying filter circuit, DC-DC electricity in structure
Road, output rectifier and filter, temperature sensing circuit, power-supplying circuit, protection circuit, power management control circuit and anti-
Current feed circuit, wherein, the DC-DC circuit is connected between the input rectifying filter circuit and the output rectifier and filter, the confession
Electric control circuit is connected between the DC-DC circuit and the power management control circuit, and the temperature sensing circuit is connected to the confession
Between electric control circuit and the protection circuit, the power management control circuit be connected to the protection circuit and the feedback circuit it
Between, the feedback circuit is connected with the output rectifier and filter.It uses thermistor to do temperature detection, and small volume cost is low,
Power and protect using the control circuit of main circuit itself, it is simple in construction, there is less number of components, by two in its protection circuit
Pole pipe itself pressure drop provides temperature return difference during overheat protector, it is ensured that main circuit can just work after temperature drop after overheat protector,
Driver is set not to be operated in the environment of high temperature.
Brief description of the drawings
Fig. 1 is functional-block diagram of the present utility model.
Fig. 2 is the circuit theory diagrams of protection circuit of the present utility model.
Embodiment
It is as shown in Figure 1 to Figure 2 a kind of preferably specific embodiment, a kind of excess temperature for carrying return difference of the present utility model
Protection circuit, including input rectifying filter circuit（10）, DC-DC circuit（20）, output rectifier and filter（30）, temperature detection
Circuit（40）, power-supplying circuit（50）, protection circuit（60）, power management control circuit（70）And feedback circuit（80）,
Wherein, the DC-DC circuit（20）It is connected to the input rectifying filter circuit（10）With the output rectifier and filter（30）Between,
The power-supplying circuit（50）It is connected to the DC-DC circuit（20）With the power management control circuit（70）Between, temperature inspection
Slowdown monitoring circuit（40）It is connected to the power-supplying circuit（50）With the protection circuit（60）Between, the power management control circuit（70）
It is connected to the protection circuit（60）Between the feedback circuit, the feedback circuit（80）With the output rectifier and filter（30）Even
Connect.
The protection circuit（60）Including heat sensitive electronic（NTC）, first resistor（R1）, second resistance（R2）, 3rd resistor
（R3）, the 4th resistance（R4）, the 5th resistance（R5）, the 6th resistance（R6）, diode（D1）, electric capacity (C1) and FET
（Q1）, wherein, the heat sensitive electronic（NTC）With first resistor（R1）, second resistance（R2）Concatenation, the diode（D1）With the 5th electricity
Resistance（R5）, FET（Q1）Concatenation, the 6th resistance（R6）With the FET（Q1）Connection, the 3rd resistor（R3）Connection
In the diode（D1）With second resistance（R2）Between, the electric capacity（C1）It is connected in the 5th resistance in parallel（R5）With the 3rd electricity
Resistance（R3）Between.
Above-mentioned protection circuit, temperature detection is done using NTC, and small volume cost is low, utilizes the control circuit of main circuit itself
Power and protect, it is simple in construction, there is less number of components.When providing overheat protector by diode D1 itself pressure drop in circuit
Temperature return difference, it is ensured that main circuit can just work after temperature drop after overheat protector, makes driver not to be operated in the environment of high temperature
In.
Embodiment of the present utility model and accompanying drawing are intended merely to show design concept of the present utility model, the utility model
Protection domain should not necessarily be limited to this embodiment.
It can be seen from the above description that purpose of design of the present utility model can effectively be implemented.The portion of embodiment
Divide and illustrate the purpose of this utility model and implement function and structure theme, and including other equivalent substitutions.
Therefore, right of the present utility model, which is constituted, includes other equivalence enforcements, and the specific scope of claims are incorporated herein by reference.
Claims (2)
1. a kind of thermal-shutdown circuit for carrying return difference, it is characterised in that：Including input rectifying filter circuit（10）, DC-DC electricity
Road（20）, output rectifier and filter（30）, temperature sensing circuit（40）, power-supplying circuit（50）, protection circuit（60）, electricity
Source control controls circuit（70）And feedback circuit（80）, wherein, the DC-DC circuit（20）It is connected to the input rectifying filtered electrical
Road（10）With the output rectifier and filter（30）Between, the power-supplying circuit（50）It is connected to the DC-DC circuit（20）With
The power management control circuit（70）Between, the temperature sensing circuit（40）It is connected to the power-supplying circuit（50）With the protection
Circuit（60）Between, the power management control circuit（70）It is connected to the protection circuit（60）Between the feedback circuit, this is anti-
Current feed circuit（80）With the output rectifier and filter（30）Connection.
2. a kind of thermal-shutdown circuit for carrying return difference as claimed in claim 1, it is characterised in that the protection circuit（60）Bag
Include heat sensitive electronic（NTC）, first resistor（R1）, second resistance（R2）, 3rd resistor（R3）, the 4th resistance（R4）, the 5th resistance
（R5）, the 6th resistance（R6）, diode（D1）, electric capacity (C1) and FET（Q1）, wherein, the heat sensitive electronic（NTC）With
First resistor（R1）, second resistance（R2）Concatenation, the diode（D1）With the 5th resistance（R5）, FET（Q1）Concatenation, should
6th resistance（R6）With the FET（Q1）Connection, the 3rd resistor（R3）It is connected to the diode（D1）With second resistance
（R2）Between, the electric capacity（C1）It is connected in the 5th resistance in parallel（R5）With the 3rd resistor（R3）Between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621435573.8U CN206412928U (en) | 2016-12-26 | 2016-12-26 | A kind of thermal-shutdown circuit for carrying return difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621435573.8U CN206412928U (en) | 2016-12-26 | 2016-12-26 | A kind of thermal-shutdown circuit for carrying return difference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206412928U true CN206412928U (en) | 2017-08-15 |
Family
ID=59552009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621435573.8U Active CN206412928U (en) | 2016-12-26 | 2016-12-26 | A kind of thermal-shutdown circuit for carrying return difference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206412928U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303193A (en) * | 2018-04-10 | 2018-07-20 | 国家电网公司 | A kind of connecting terminal overheating detection circuit and single-phase charge-controlled intelligent electric meter |
-
2016
- 2016-12-26 CN CN201621435573.8U patent/CN206412928U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303193A (en) * | 2018-04-10 | 2018-07-20 | 国家电网公司 | A kind of connecting terminal overheating detection circuit and single-phase charge-controlled intelligent electric meter |
| CN108303193B (en) * | 2018-04-10 | 2023-11-07 | 国家电网公司 | Binding post overheat detection circuit and single-phase charge control intelligent ammeter |
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Legal Events
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211227 Address after: 528000 No. 4, Huanzhen East Road, Beijiao Town, Shunde District, Foshan City, Guangdong Province Patentee after: FOSHAN SHUNDE EAGLERISE ELECTRIC POWER TECHNOLOGY Co.,Ltd. Patentee after: FOSHAN YIGEER ELECTRONICS CO.,LTD. Patentee after: JI'AN IGOR ELECTRIC Co.,Ltd. Patentee after: Ji'an Igor magnetoelectric Technology Co.,Ltd. Patentee after: EAGLERISE ELECTRIC & ELECTRONIC (CHINA) Co.,Ltd. Address before: 528300 No. A3, Guicheng Science Park, Jianping Road, Nanhai District, Foshan City, Guangdong Province Patentee before: EAGLERISE ELECTRIC & ELECTRONIC (CHINA) Co.,Ltd. |