CN207625287U - A kind of self-healing LED switch power circuit of short-circuit protection - Google Patents
A kind of self-healing LED switch power circuit of short-circuit protection Download PDFInfo
- Publication number
- CN207625287U CN207625287U CN201721927639.XU CN201721927639U CN207625287U CN 207625287 U CN207625287 U CN 207625287U CN 201721927639 U CN201721927639 U CN 201721927639U CN 207625287 U CN207625287 U CN 207625287U
- Authority
- CN
- China
- Prior art keywords
- short
- electrically connected
- switching tube
- drive module
- circuit
- 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.)
- Expired - Fee Related
Links
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a kind of self-healing LED switch power circuit of short-circuit protection, including the drive module of detector, switching tube, voltage-controlled type, to drive the PWM control modules of external LED output pwm signal；Drive module includes feeder ear, triggering end, drive end, switching tube includes control terminal, input terminal, output end, one end of the detector is electrically connected with external power supply to detect short-circuit signal, and the other end of detector and the control terminal of switching tube are electrically connected to control switching tube on/off according to short-circuit signal, the input terminal of switching tube and the triggering end of drive module are electrically connected, the output end of switching tube is grounded, the feeder ear of drive module is connect with external power supply to receive supply voltage, the driving end of drive module is electrically connected with PWM control modules to shut down/start the running of PWM control modules, the design has short-circuit protection self-recovering function, without manually restarting, it is easy to operate, it is more convenient.
Description
Technical field
The utility model is related to LED switch power drives field, especially a kind of self-healing LED switch electricity of short-circuit protection
Source circuit.
Background technology
Traditional LED switch power circuit, first to external ac power source rectification, rectifier system includes full-bridge rectification or half
The large power supply of bridge rectification, wherein Half bridge rectifier design, has many advantages, such as that performance is stable and power density is high, and circuit design
On the function of short-circuit protection can generally be added, mode is generally provided with the drive module of detector and voltage-controlled type,
The feeder ear of the drive module of voltage-controlled type accesses external power supply to receive supply voltage, the driving end of drive module and PWM
Control module is electrically connected to start the running of PWM control modules, and short-circuit signal, other end access driving mould are detected in detector one end
The feeder ear of block, when external power supply normal operation, drive module can normally start the running of PWM control modules, when detecting short circuit
Signal, detector is by the feeder ear of Signal averaging to drive module so that drive module driving PWM control modules are shut down, and are played
The effect of circuit is protected, however the signal for the drive module that is added to can not release in drive module, drive module can keep closing
Stop PWM control modules, therefore after short trouble exclusion, it is necessary to restart drive module, switching power circuit can just restore again
Work causes operation very troublesome, puzzlement is brought to user.
Utility model content
In order to solve the above technical problems, the purpose of this utility model is to provide a kind of self-healing LED switch of short-circuit protection
Power supply.
The technical solution adopted in the utility model is：
A kind of self-healing LED switch power circuit of short-circuit protection, includes the drive of detector, switching tube, voltage-controlled type
Dynamic model block, for drive external LED output pwm signal PWM control modules；Drive module includes feeder ear, triggering end, driving
End, switching tube include control terminal, input, output end, and one end of the detector and external power supply electric connection are short to detect
Road signal, and the control terminal of the other end of detector and switching tube be electrically connected with according to short-circuit signal control switching tube it is logical/
Disconnected, the input terminal of switching tube and the triggering end of drive module are electrically connected, the output end ground connection of switching tube, the power supply of drive module
End is connect with external power supply to receive supply voltage, and driving end and the PWM control modules of drive module are electrically connected to close stop start
Dynamic PWM control modules running.
The detector includes comparator, and one input end and the external power supply of comparator are electrically connected to detect short-circuit letter
Number, another input terminal of comparator is electrically connected with base modules to provide reference voltage, the output end and switching tube of comparator
Control terminal be electrically connected.
The drive module is 555 timers.
The switching tube includes metal-oxide-semiconductor Q1, and the grid of metal-oxide-semiconductor Q1 and the output end of comparator are electrically connected, metal-oxide-semiconductor Q1's
Drain electrode and the triggering end of 555 timers are electrically connected, the source electrode ground connection of MOS pipes Q1.
Further include metal-oxide-semiconductor Q2, the driving end electric connection of the grid of metal-oxide-semiconductor Q2 and 555 timers, the drain electrode of metal-oxide-semiconductor Q2
It is electrically connected with PWM control modules, the source electrode ground connection of metal-oxide-semiconductor Q2.
The beneficial effects of the utility model：
The self-healing LED switch power supply of the utility model short-circuit protection, detector detect short-circuit signal, and control switching tube is led
It is logical, drag down the level of drive module triggering end so that voltage is released, and makes PWM control modules to the driving end of drive module
It stops operating, when short trouble does not exclude, then detector is continuously detected short-circuit signal, and switching tube is constantly in conducting state,
The holding of PWM control modules stops operating, and when short trouble excludes, the triggering end of switching tube shutdown, drive module returns high electricity
Flat, the driving end of drive module starts the work of PWM control modules, and the LED switch power supply of the design has short-circuit protection self- recoverage
Function, it is easy to operate without manually restarting, it is more convenient.
Description of the drawings
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings.
Fig. 1 is the circuit diagram of the utility model LED switch power supply.
Specific implementation mode
As shown in Figure 1, the utility model LED switch power supply, includes the driving of detector 1, switching tube 2, voltage-controlled type
Module 3, for drive external LED output pwm signal PWM control modules 4；Drive module 3 includes feeder ear, triggering end, driving
End, switching tube 2 include control terminal, input, output end, and one end and the external power supply of detector 1 are electrically connected to detect short circuit
Signal, and the control terminal of the other end of detector 1 and switching tube 2 be electrically connected with according to short-circuit signal control switching tube 2 it is logical/
Disconnected, the input terminal of switching tube 2 is electrically connected with the triggering end of drive module 3, the output end ground connection of switching tube 2, drive module 3
Feeder ear connect with external power supply to receive supply voltage, driving end and the PWM control modules 4 of drive module 3 are electrically connected
To shut down/start the running of PWM control modules 4.
Detector 1 detects short-circuit signal, and control switching tube 2 is connected, and drags down the level of 3 triggering end of drive module so that electricity
Pressure is released, and to which the driving end of drive module 3 makes PWM control modules 4 stop operating, when short trouble does not exclude, is then detected
Device 1 is continuously detected short-circuit signal, and switching tube 2 is constantly in conducting state, and the holding of PWM control modules 4 stops operating, and when short
Road troubleshooting, switching tube 2 turn off, and the triggering end of drive module 3 returns high level, and the driving end of drive module 3 starts PWM controls
Molding block 4 works, and the LED switch power supply of the design has short-circuit protection self-recovering function, easy to operate without manually restarting,
It is more convenient.
Wherein, PWM control modules 4 herein are SG3525 chips, when the pin 8 of SG3525 chips is high level,
SG3525 chips operate, and PWM modulation signal is provided for external LED.
Detector 1 includes comparator, and one input end and the external power supply of comparator are electrically connected to detect short-circuit signal,
Another input terminal of comparator is electrically connected with base modules 11 to provide reference voltage, output end and the switching tube 2 of comparator
Control terminal be electrically connected, base modules 11 can be made of resistance and/or capacitance herein.
Drive module 3 is 555 timers, and switching tube 2 includes metal-oxide-semiconductor Q1, the output of the grid and comparator of metal-oxide-semiconductor Q1
End is electrically connected, and the drain electrode of metal-oxide-semiconductor Q1 is electrically connected with the triggering end of 555 timers, and the source electrode ground connection of metal-oxide-semiconductor Q1 further includes
The grid of metal-oxide-semiconductor Q2, MOS pipe Q2 and the driving end of 555 timers are electrically connected, drain electrode and the PWM control modules of metal-oxide-semiconductor Q2
4 are electrically connected, the source electrode ground connection of metal-oxide-semiconductor Q2.
555 timers are powered by external power supply, by the improvement of the design, the drain electrode of metal-oxide-semiconductor Q1 and drawing for 555 timers
Foot 2 and the connection of pin 6 and source electrode ground connection, pin 2 and pin 6 are the high and low triggering end of 555 timers respectively, outer herein
When portion's power supply is normal, the output of 3 no signal of pin, and when external power supply short circuit, metal-oxide-semiconductor Q1 conductings drag down pin 2 and pin 6
Level so that pin 3 can export high level, so that metal-oxide-semiconductor Q2 conductings, drag down the electricity of the pin 8 of PWM control modules 4
It is flat so that PWM control modules 4 stop operating, and restore to short trouble, and metal-oxide-semiconductor Q1 can end, and 555 timers will at this time
Automatic charging, pin 2 and pin 6 restore high level, work to control PWM control modules 4.
The foregoing is merely the preferred embodiments of the utility model, the utility model is not limited to above-mentioned embodiment party
Formula, if with essentially identical means realize the technical solution of the utility model aim belong to the scope of protection of the utility model it
It is interior.
Claims (5)
1. a kind of self-healing LED switch power circuit of short-circuit protection, it is characterised in that：Including detector, switching tube, voltage control
The drive module of type processed, for drive external LED output pwm signal PWM control modules；Drive module includes feeder ear, triggering
End, driving end, switching tube includes control terminal, input, output end, one end and the external power supply of the detector be electrically connected with
Short-circuit signal is detected, and the control terminal of the other end of detector and switching tube is electrically connected and is switched to be controlled according to short-circuit signal
Pipe on/off, the input terminal of switching tube and the triggering end of drive module are electrically connected, the output end ground connection of switching tube, drive module
Feeder ear connect with external power supply to receive supply voltage, driving end and the PWM control modules of drive module be electrically connected with
Shut down/start the running of PWM control modules.
2. the self-healing LED switch power circuit of a kind of short-circuit protection according to claim 1, it is characterised in that：It is described
Detector includes comparator, and one input end and the external power supply of comparator are electrically connected to detect short-circuit signal, comparator
Another input terminal is electrically connected with base modules to provide reference voltage, and the output end of comparator and the control terminal of switching tube are electrical
Connection.
3. the self-healing LED switch power circuit of a kind of short-circuit protection according to claim 2, it is characterised in that：It is described
Drive module is 555 timers.
4. the self-healing LED switch power circuit of a kind of short-circuit protection according to claim 3, it is characterised in that：It is described
Switching tube includes metal-oxide-semiconductor Q1, and the grid of metal-oxide-semiconductor Q1 and the output end of comparator are electrically connected, and the drain electrode of metal-oxide-semiconductor Q1 is fixed with 555
When device triggering end be electrically connected, the source electrode of metal-oxide-semiconductor Q1 ground connection.
5. the self-healing LED switch power circuit of a kind of short-circuit protection according to claim 4, it is characterised in that：Also wrap
Include metal-oxide-semiconductor Q2, the driving end electric connection of the grid of metal-oxide-semiconductor Q2 and 555 timers, drain electrode and the PWM control modules of metal-oxide-semiconductor Q2
It is electrically connected, the source electrode ground connection of metal-oxide-semiconductor Q2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721927639.XU CN207625287U (en) | 2017-12-29 | 2017-12-29 | A kind of self-healing LED switch power circuit of short-circuit protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721927639.XU CN207625287U (en) | 2017-12-29 | 2017-12-29 | A kind of self-healing LED switch power circuit of short-circuit protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207625287U true CN207625287U (en) | 2018-07-17 |
Family
ID=62830765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721927639.XU Expired - Fee Related CN207625287U (en) | 2017-12-29 | 2017-12-29 | A kind of self-healing LED switch power circuit of short-circuit protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207625287U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112103906A (en) * | 2020-06-15 | 2020-12-18 | 深圳天邦达科技有限公司 | Short-circuit protection circuit, power supply, electric equipment and short-circuit protection system |
| CN113541653A (en) * | 2021-07-27 | 2021-10-22 | 温州大学 | Nanosecond steep edge pulse signal generator based on transmission line reflection principle |
-
2017
- 2017-12-29 CN CN201721927639.XU patent/CN207625287U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112103906A (en) * | 2020-06-15 | 2020-12-18 | 深圳天邦达科技有限公司 | Short-circuit protection circuit, power supply, electric equipment and short-circuit protection system |
| CN113541653A (en) * | 2021-07-27 | 2021-10-22 | 温州大学 | Nanosecond steep edge pulse signal generator based on transmission line reflection principle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103841725B (en) | To release control module, controllable silicon light modulation LED drive circuit and system | |
| CN202364112U (en) | Starting circuit of control chip of switching-mode power supply | |
| CN203056953U (en) | Driver and bus capacitor discharge circuit thereof | |
| CN203537358U (en) | One-key switching circuit | |
| CN202384752U (en) | Switching power supply overcurrent protection circuit | |
| CN202917976U (en) | Protective device of solar energy LED power supply input polarity reversal connection | |
| CN207625287U (en) | A kind of self-healing LED switch power circuit of short-circuit protection | |
| CN202488350U (en) | Fly-back switching power supply circuit suitable for photovoltaic system | |
| CN203104871U (en) | Intelligently controlled DALI (digital addressable lighting interface) dimming control device | |
| CN109613968A (en) | Power supply redundant output circuit with short-circuit protection | |
| CN108430140A (en) | A kind of PWM modulation LED drive circuit with power failure memory function | |
| CN102570787B (en) | A kind of circuit for photovoltaic inverter system accessory power supply | |
| CN107205301A (en) | A kind of dual power supply LED power supply circuit | |
| CN204089330U (en) | A kind of adaptive power-supply battery supplies power with double circuit device | |
| CN203289394U (en) | A switch circuit and a communication power supply | |
| CN203352860U (en) | Intelligent identification power supply during power grid blackout or artificial-switching power-off | |
| CN113691116B (en) | Power supply controller start control system | |
| CN205355776U (en) | Short -circuit protection circuit based on power load is unusual | |
| CN213847095U (en) | Dormancy circuit and lighting device | |
| CN202004738U (en) | Electronic safety switch controlled by MOS (metal oxide semiconductor) tube | |
| CN210577924U (en) | Charging circuit based on solar charging and system thereof | |
| CN201156786Y (en) | Energy saving television synchronous switch | |
| CN209250219U (en) | A kind of under-voltage delay protection device of power supply | |
| CN103107702B (en) | A kind of electric power management circuit | |
| CN203933137U (en) | A kind of improved mains hybrid type solar electric power supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180717 Termination date: 20211229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |