CN207783223U - A kind of circuit of control LED drive power on and off - Google Patents
A kind of circuit of control LED drive power on and off Download PDFInfo
- Publication number
- CN207783223U CN207783223U CN201820235766.1U CN201820235766U CN207783223U CN 207783223 U CN207783223 U CN 207783223U CN 201820235766 U CN201820235766 U CN 201820235766U CN 207783223 U CN207783223 U CN 207783223U
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- Prior art keywords
- triode
- chip
- power
- resistance
- circuit
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- 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]
Abstract
A kind of circuit of control LED drive power on and off,Including AC DC power supply circuits,Switching circuit,Load,It is characterized in that switching circuit includes the chip U1 with field-effect tube structure,Resistance R7,R8,R9,Triode Q1,Q2,The base stage of triode Q1 receives control signal by resistance R8,The emitter of triode Q1 is grounded,Collector is connected by resistance R9 with the 12V power ends of AC DC power supply circuits,The base stage of triode Q2 is connected with the collector of triode Q1,The emitter of triode Q2 is grounded,The collector of triode Q2 is connected by resistance R7 with the VCC feet of chip,The 12V power ends of AC DC power supply circuits are connected with the VCC feet of chip,The Drain feet of the field-effect tube structure of chip are connect with load circuit end,The GND feet of chip are grounded.The utility model compared with the prior art, even if being less likely to be damaged if with frequent on and off power switching portion, advantage with long service life.
Description
Technical field：
The utility model is related to a kind of conversion circuits.
Background technology：
As shown in figure 5, the LED drive power on and off of prior art uses traditional mechanical switch（Relay）To do
Switching can be because of the pyrophoric behavio(u)r that sparking generates, to affect mechanical switch in transfer process（Relay）Use the longevity
Life.
Invention content：
Even if the goal of the invention of the utility model is not allowing rapid wear if providing a kind of frequent on and off power switching portion
Bad, the circuit of control LED drive power on and off with long service life.
The utility model is realized in this way including AC-DC power circuits, switching circuit, load, the power input of load
End is connected with the power output end of AC-DC power circuits, the circuit end connection of switching circuit one end and load, other end ground connection,
It is particular in that switching circuit includes with the chip of field-effect tube structure, resistance R7, R8, R9, triode Q1, Q2 three
The base stage of pole pipe Q1 receives control signal by resistance R8, the emitter ground connection of triode Q1, collector by resistance R9 with
The ends power supply 12V of AC-DC power circuits are connected, and the base stage of triode Q2 is connected with the collector of triode Q1, triode Q2's
Emitter is grounded, the VCC feet that the collector of triode Q2 passes through resistance R7 and chip（Driving power input terminal）It is connected, AC-DC
The power output end of power circuit and the VCC feet of chip（Driving power input terminal）It is connected, load circuit end is by being integrated in
Field-effect tube ground connection chip that either outer in chip is connected on chip, which then controls, is integrated in chip the or outer chip that is connected on
Field-effect tube is logical or disconnected.
When work, when having detected that low level signal input, the foot base stage of triode Q1 be pulled low, triode is not turned on,
High level on resistance R8 is input to the foot base stage of triode Q2, so that triode Q2 is connected, drags down chip VCC feet voltage to low electricity
It is flat.Chip power supply pin is low level, inhibits chip to generate the field-effect tube that pulse signal is controlled to chip, leads to field-effect
Pipe open circuit.Load（LED light）Circuit end be not formed into a loop, output is turned off.
When detecting that high level signal is input to the base stage of triode Q1, triode ON, the base stage electricity of triode Q2
Pressure is pulled low to low level with the conducting of Q1, and triode Q2 is not turned on, and chip VCC pin voltage maintains normal power supply electricity
Pressure, chip generate the field-effect tube that pulse signal is controlled to chip, make field-effect tube access.Power unit works normally, and bears
It carries and connects, load（LED light）Normally light.
Compared with the prior art, if even if having frequent on and off power switching portion the utility model is less likely to be damaged
, advantage with long service life.
Description of the drawings
Fig. 1 is the structural schematic diagram of embodiment 1；
Fig. 2 is the structural schematic diagram of embodiment 2；
Fig. 3 is the structural schematic diagram of embodiment 3；
Fig. 4 is the structural schematic diagram of embodiment 4；
Fig. 5 is the structural schematic diagram of prior art.
Specific implementation mode：
The utility model is described in further detail in conjunction with embodiment：
Embodiment 1, as shown in Figure 1, including AC-DC power circuits 1, switching circuit 2, load 3, load（LED light）Electricity
Source input terminal is connected with the power output end of AC-DC power circuits, switching circuit one end and load（LED light）Circuit end connect
Connect, other end ground connection, load 3 is LED light, be particular in that switching circuit include the chip U1 for being integrated with field-effect tube,
Resistance R7, R8, R9, filtering capacitance C1, triode Q1, Q2, the base stage of triode Q1 is received by resistance R8 controls signal, and three
The emitter of pole pipe Q1 is grounded, and collector is connected by resistance R9 with the ends power supply 12V of AC-DC power circuits, triode Q2
Base stage be connected with the collector of triode Q1, filtering with capacitance C1 be connected to triode Q1 base stage and transmitting interpolar, three poles
The emitter of pipe Q2 is grounded, the VCC feet that the collector of triode Q2 passes through resistance R7 and chip（Driving power input terminal）It is connected,
The VCC feet that the power output end of AC-DC power circuits passes through resistance and chip（Driving power input terminal）It is connected, is integrated in core
The Drain feet of field-effect tube in piece and load（LED light）The connection of circuit end, the GND feet ground connection of chip, chip then controls
It is logical or disconnected between the field-effect tube being integrated in chip and GND feet.
Embodiment 2：As shown in Fig. 2, the present embodiment is on the basis of embodiment 1, external field-effect tube MOSFET is logical
The grid crossed is connected on the DRV feet of chip U, and the circuit of load is grounded by field-effect tube MOSFET, the DRV feet output of chip
Control the logical or disconnected of signal control field-effect tube MOSFET.
Embodiment 3：As shown in figure 3, the present embodiment is on the basis of embodiment 1, load 3 is to carry isolation structure（Become
Depressor）4, in this way, when open circuit, load 3 is just not charged, ensures Electrical Safety.
Embodiment 4：As shown in figure 4, the present embodiment is on the basis of embodiment 2, load 3 is to carry isolation structure（Become
Depressor）4, in this way, when open circuit, load 3 is just not charged, ensures Electrical Safety.
Claims (1)
1. a kind of circuit of control LED drive power on and off, including AC-DC power circuits, switching circuit, load, load
Power input is connected with the power output end of AC-DC power circuits, the circuit end connection of switching circuit one end and load, another
End ground connection, it is characterised in that switching circuit includes chip, resistance R7, R8, R9, triode Q1, the Q2 for carrying field-effect tube structure,
The base stage of triode Q1 receives control signal by resistance R8, the emitter ground connection of triode Q1, collector by resistance R9 with
The ends power supply 12V of AC-DC power circuits are connected, and the base stage of triode Q2 is connected with the collector of triode Q1, triode Q2's
Emitter is grounded, and the collector of triode Q2 is connected by resistance R7 with the VCC feet of chip, and the power supply of AC-DC power circuits is defeated
Outlet is connected with the VCC feet of chip, and load circuit end is by being integrated in chip the or outer field-effect tube for being connected on chip
Ground connection, it is logical or disconnected that chip then controls the either outer field-effect tube for being connected on chip being integrated in chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820235766.1U CN207783223U (en) | 2018-02-09 | 2018-02-09 | A kind of circuit of control LED drive power on and off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820235766.1U CN207783223U (en) | 2018-02-09 | 2018-02-09 | A kind of circuit of control LED drive power on and off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207783223U true CN207783223U (en) | 2018-08-28 |
Family
ID=63209872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820235766.1U Active CN207783223U (en) | 2018-02-09 | 2018-02-09 | A kind of circuit of control LED drive power on and off |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207783223U (en) |
-
2018
- 2018-02-09 CN CN201820235766.1U patent/CN207783223U/en active Active
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