CN210928082U - Stroboscopic-removing protection circuit - Google Patents
Stroboscopic-removing protection circuit Download PDFInfo
- Publication number
- CN210928082U CN210928082U CN201921839906.7U CN201921839906U CN210928082U CN 210928082 U CN210928082 U CN 210928082U CN 201921839906 U CN201921839906 U CN 201921839906U CN 210928082 U CN210928082 U CN 210928082U
- Authority
- CN
- China
- Prior art keywords
- circuit
- filter circuit
- output
- resistor
- direct current
- 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.)
- Active
Links
Images
Classifications
-
- 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]
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a stroboscopic-removing protection circuit, which comprises a rectification circuit, an absorption circuit, a capacitance filter circuit, a dummy load, a rapid active filter circuit, an inductance filter circuit and a current detection circuit; alternating current power supply VIN + outputs pulsating direct current after half-wave rectification by a rectification circuit, the pulsating direct current absorbs spike voltage generated in the rectification process by an absorption circuit and filters alternating current voltage components on an output circuit by a capacitance filter circuit, the pulsating direct current is loaded at two ends of a dummy load, a rapid active filter circuit carries out rapid charging and filtering, alternating current ripples are filtered to output smooth direct current, and meanwhile, control on a switch tube Q1 is output in the charging process, so that the switch tube Q1 is conducted and then is output to an LED load by an inductance filter circuit. The utility model discloses can prevent to cause the injury to the personnel because of the LED stroboscopic to and when the load is unusual, provide the safety guarantee for the circuit, prevent accident's emergence.
Description
Technical Field
The utility model relates to a protection circuit technical field, especially a remove stroboscopic protection circuit.
Background
In order to meet the requirements of the national advocated environment protection and low-carbon life call, a protection circuit needs to be added to an LED load control circuit, so that the waste caused by easy damage of the circuit due to lack of the protection circuit is avoided. However, the protection circuit of the current LED load control circuit is too complex in design and high in manufacturing cost, so that the circuit structure is overstaffed in design and high in maintenance cost; although a part of the current circuits can realize a certain overcurrent protection effect, stroboflash removal cannot be realized; the other part of the circuit can realize stroboflash removal and cannot realize overcurrent protection; and some circuits cannot recover after overcurrent protection is realized. And the interference of large alternating current ripple and peak voltage exists in partial circuits, and the stability is poor.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to above-mentioned prior art not enough, provide a remove stroboscopic protection circuit.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is: a stroboscopic removing protection circuit comprises a rectification circuit, an absorption circuit, a capacitance filter circuit, a dummy load, a rapid active filter circuit, an inductance filter circuit and a current detection circuit; alternating current power supply VIN + outputs pulsating direct current after half-wave rectification by a rectification circuit, the pulsating direct current absorbs spike voltage generated in the rectification process by an absorption circuit and filters alternating current voltage components on an output circuit by a capacitance filter circuit, the pulsating direct current is loaded at two ends of a dummy load, a rapid active filter circuit carries out rapid charging and filtering, alternating current ripples are filtered to output smooth direct current, and meanwhile, control on a switch tube Q1 is output in the charging process, so that the switch tube Q1 is conducted and then is output to an LED load by an inductance filter circuit.
In the above technical solution, the rectifying circuit includes a diode D1, the positive terminal is connected to the end VIN + of the ac power supply, and the negative terminal is connected to the input terminal of the dummy load.
In the above technical solution, the absorption circuit includes a capacitor C1 and a resistor R1 connected in series and connected in parallel to the rectification circuit.
In the above technical solution, the capacitor filter circuit includes polar capacitors C2 and C3, which are respectively connected in series to the output end of the rectifier circuit and then grounded.
In the above technical solution, the dummy load is a resistor R5.
In the above technical solution, the fast active filter circuit includes a diode D3, a voltage regulator tube D4, a resistor R3, and a polar capacitor C4, the dummy load is connected in parallel with a diode D3 connected in the positive direction, a voltage regulator tube D4 connected in the reverse direction, and a polar capacitor C4, one end of the resistor R3 is connected to the anode of the diode D3, and the other end is connected to the anode of the voltage regulator tube D4.
In the technical scheme, the input end of the switch tube Q1 is connected with the input end of the dummy load, one path of the control end is connected with a node between a voltage regulator tube D4 and a polar capacitor C4 after being connected with a resistor R in series, the other path of the control end is connected with a voltage regulator tube D2 in series and in reverse connection and then is connected with the input end of the inductance filter circuit, and the output end of the control end is connected with the input end of the inductance filter circuit.
In the above technical solution, the current detection circuit includes a resistor R2 connected between the output terminal of the switching transistor Q1 and the input terminal of the inductive filter circuit.
The utility model has the advantages that:
1. the whole circuit has simple design, reliable performance, environmental protection, safety and wide applicability.
2. Has overload/short circuit protection function and can recover output short circuit.
3. Full power no strobe output.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a stroboscopic-removing protection circuit includes a rectification circuit, an absorption circuit, a capacitive filter circuit, a dummy load, a fast active filter circuit, an inductive filter circuit, and a current detection circuit; alternating current power supply VIN + outputs pulsating direct current after half-wave rectification by a rectification circuit, the pulsating direct current absorbs spike voltage generated in the rectification process by an absorption circuit and filters alternating current voltage components on an output circuit by a capacitance filter circuit, the pulsating direct current is loaded at two ends of a dummy load, a rapid active filter circuit carries out rapid charging and filtering, alternating current ripples are filtered to output smooth direct current, and meanwhile, control on a switch tube Q1 is output in the charging process, so that the switch tube Q1 is conducted and then is output to an LED load by an inductance filter circuit.
Specific electronic components's setting and connection structure: the rectifying circuit comprises a diode D1, the positive end of the diode D1 is connected with the end VIN + of the alternating current power supply, and the negative end of the diode D1 is connected with the input end of the dummy load. The absorption circuit comprises a capacitor C1 and a resistor R1 which are connected in series and are connected in parallel with the rectifying circuit. The capacitor filter circuit comprises polar capacitors C2 and C3 which are respectively connected to the output end of the rectifying circuit in series and then grounded. The dummy load is a resistor R5. The rapid active filter circuit comprises a diode D3, a voltage regulator tube D4, a resistor R3 and a polar capacitor C4, the dummy load is connected with a diode D3 connected in the positive direction, a voltage regulator tube D4 connected in the reverse direction and a polar capacitor C4 in parallel, one end of the resistor R3 is connected with the anode of the diode D3, and the other end of the resistor R3 is connected with the anode of a voltage regulator tube D4. The input end of the switch tube Q1 is connected with the input end of the dummy load, one path of the control end is connected with a node between a voltage regulator tube D4 and a polar capacitor C4 after being connected with a resistor R in series, the other path of the control end is connected with the input end of the inductance filter circuit after being connected with a voltage regulator tube D2 in series and in reverse connection, and the output end of the control end is connected with the input end of the inductance filter circuit. The current detection circuit comprises a resistor R2 connected between the output end of the switch tube Q1 and the input end of the inductance filter circuit.
The utility model discloses a theory of operation: alternating current voltage and current are input from a VIN end, pulsating direct current is obtained after D1 half-wave rectification, C1 and R1 are connected in series and then connected in parallel with two ends of D1, an RC absorption circuit is formed by C1 and R1, the peak voltage generated in the process of turning on and off a diode is favorably absorbed, then the peak voltage is filtered by C2 and C3 capacitors, an alternating current voltage component on an output circuit is filtered, R5 is a passive dummy load and positioned behind the capacitor filter circuit to play a role in assisting and stabilizing the output voltage, then the alternating current voltage is filtered by a fast active filter circuit formed by D3, D4, R3 and C4, wherein D3, D4 and R3 carry out fast charging and filtering on C4, the alternating current on the output circuit is rapidly filtered, smooth direct current is obtained, meanwhile, C4 provides a driving level for a base of Q1 through R4 and D2 in the charging process, D-S of Q1 is conducted, and the direct current passes through R2 and is filtered again by an inductor 1 to output a smooth load LF +, thereby eliminating the LED stroboscopic phenomenon.
When the output end is overloaded or short-circuited, the C4 is charged through D2 and R4 by detecting a signal on the sampling resistor R2, however, the source of the Q1 generates a high level, so that the Q1 is cut off rapidly, and the purposes of overload protection and short-circuit protection are achieved.
The above embodiments are merely illustrative and not restrictive, and all equivalent changes and modifications made by the methods described in the claims are intended to be included within the scope of the present invention.
Claims (8)
1. A stroboscopic protection circuit that removes its characterized in that: the circuit comprises a rectifying circuit, an absorption circuit, a capacitance filter circuit, a dummy load, a rapid active filter circuit and an inductance filter and current detection circuit; alternating current power supply VIN + outputs pulsating direct current after half-wave rectification by a rectification circuit, the pulsating direct current absorbs spike voltage generated in the rectification process by an absorption circuit and filters alternating current voltage components on an output circuit by a capacitance filter circuit, the pulsating direct current is loaded at two ends of a dummy load, a rapid active filter circuit carries out rapid charging and filtering, alternating current ripples are filtered to output smooth direct current, and meanwhile, control on a switch tube Q1 is output in the charging process, so that the switch tube Q1 is conducted and then is output to an LED load by an inductance filter circuit.
2. The strobe-free protection circuit of claim 1, wherein: the rectifying circuit comprises a diode D1, the positive end of the diode D1 is connected with the end VIN + of the alternating current power supply, and the negative end of the diode D1 is connected with the input end of the dummy load.
3. The strobe-free protection circuit of claim 1, wherein: the absorption circuit comprises a capacitor C1 and a resistor R1 which are connected in series and are connected in parallel with the rectifying circuit.
4. The strobe-free protection circuit of claim 1, wherein: the capacitor filter circuit comprises polar capacitors C2 and C3 which are respectively connected to the output end of the rectifying circuit in series and then grounded.
5. The strobe-free protection circuit of claim 1, wherein: the dummy load is a resistor R5.
6. The strobe-free protection circuit of claim 1, wherein: the rapid active filter circuit comprises a diode D3, a voltage regulator tube D4, a resistor R3 and a polar capacitor C4, the dummy load is connected with a diode D3 connected in the positive direction, a voltage regulator tube D4 connected in the reverse direction and a polar capacitor C4 in parallel, one end of the resistor R3 is connected with the anode of the diode D3, and the other end of the resistor R3 is connected with the anode of a voltage regulator tube D4.
7. The strobe free protection circuit of claim 6, wherein: the input end of the switch tube Q1 is connected with the input end of the dummy load, one path of the control end is connected with a node between a voltage regulator tube D4 and a polar capacitor C4 after being connected with a resistor R in series, the other path of the control end is connected with the input end of the inductance filter circuit after being connected with a voltage regulator tube D2 in series and in reverse connection, and the output end of the control end is connected with the input end of the inductance filter circuit.
8. The strobe free protection circuit of claim 7, wherein: the current detection circuit comprises a resistor R2 connected between the output end of the switch tube Q1 and the input end of the inductance filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921839906.7U CN210928082U (en) | 2019-10-30 | 2019-10-30 | Stroboscopic-removing protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921839906.7U CN210928082U (en) | 2019-10-30 | 2019-10-30 | Stroboscopic-removing protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210928082U true CN210928082U (en) | 2020-07-03 |
Family
ID=71346116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921839906.7U Active CN210928082U (en) | 2019-10-30 | 2019-10-30 | Stroboscopic-removing protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210928082U (en) |
-
2019
- 2019-10-30 CN CN201921839906.7U patent/CN210928082U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205029930U (en) | Stroboscopic LED driver is removed to wide voltage high efficiency of 9 -48V scope | |
| CN109245055B (en) | Power conversion system, overcurrent protection circuit and method of power switch tube | |
| CN106230246A (en) | A kind of circuit and Switching Power Supply and liquid crystal display drive circuit | |
| CN110912415A (en) | Low-power-consumption isolated output household power supply | |
| CN102044958B (en) | Voltage reducing and boosting PFC (Power Factor Correction) circuit system with auxiliary circuit and method thereof | |
| CN206865350U (en) | A kind of filter circuit and power supply adaptor | |
| CN102594112A (en) | Anti-lightning surge circuit of switching power supply and switching power supply using same | |
| CN106972766B (en) | Power supply circuit | |
| CN210928082U (en) | Stroboscopic-removing protection circuit | |
| CN203788132U (en) | Switch power supply | |
| CN2577503Y (en) | Over voltage protection device of single-phase bridge inverter for medium voltage frequency transformer | |
| CN205864444U (en) | The POE detection output circuit of a kind of WIFI equipment and WIFI equipment | |
| CN104953863A (en) | Switching power circuit for power supply of three-phase electric energy meter | |
| CN115065228B (en) | Output sharing type industrial power supply | |
| CN115603552A (en) | Flyback switching power supply AC-DC conversion circuit | |
| CN212784820U (en) | Storage battery power supply optimization control system for suspension type monorail vehicle | |
| CN206135521U (en) | High -speed monitoring system of commercial power of emergency lighting power | |
| CN204089291U (en) | The circuit structure of retention time is extended after a kind of Switching Power Supply power-off | |
| CN211018675U (en) | Flyback AC-DC constant current power supply box | |
| CN210608942U (en) | Output system of passive signal | |
| CN213521673U (en) | Single-machine serial 65kW boosting device based on sic application | |
| CN210867530U (en) | Power module for taking energy from output end of frequency converter and motor protection device | |
| CN205725446U (en) | A kind of high efficiency single-phase APFC | |
| CN213547386U (en) | Circuit for reducing standby power consumption of switching power supply | |
| CN211830567U (en) | Lightning protection filtering power supply circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 253, Hengli Junma Road, Hengli Town, Dongguan, Guangdong 523460 Patentee after: Guangdong Qingzhou Photoelectric Technology Co.,Ltd. Address before: 523000 workshop, No.3, xiaotiantou 1st Road, Xinsi village, Hengli Town, Dongguan City, Guangdong Province Patentee before: LETARON ELECTRONIC CO.,LTD. |
|
| CP03 | Change of name, title or address |