CN207744211U - A kind of remote control LED bulb lamp circuit - Google Patents

Abstract

The utility model discloses a kind of remote control LED bulb lamp circuits, including LED module, switching circuit and decompression constant-current circuit, decompression constant-current circuit is used to be converted to DC voltage V1 the low-voltage DC VDC of suitable LED module work, and decompression constant-current circuit connects LED module；Switching circuit, switching circuit has common end G1, power source supply end VD and switch control signal SW, switching circuit connects the output end of LED module, and switching circuit is used for according to switch control signal SW, the working condition of control decompression constant-current circuit, and drag down simultaneously power source supply end VD voltage and common end G1 voltage when, turn off the power supply of LED module.The utility model circuit is simple, the area of occupancy PCB circuit board is small, and control is easier, at low cost.

Description

A kind of remote control LED bulb lamp circuit

Technical field

The utility model is related to lighting technical fields, and in particular to a kind of remote control LED bulb lamp circuit.

Background technology

LED (light emitting diode) has many advantages, such as that small power consumption, service life are long, inexpensive, is widely used in photograph The fields such as bright, display, such as LED illumination lamp, LED display, LED light decorations.

With the improvement of living standards, more stringent requirements are proposed for lighting environment of the people to LED lamplight, remote control is answered It transports and gives birth to.The remote control circuit of the lamps such as existing LED includes microcontroller and main circuit, and main circuit and microcontroller are all total ground, control Difficulty processed is big, of high cost.

Utility model content

In view of the deficiencies in the prior art, the purpose of this utility model is to provide a kind of remote control LED bulb lamp electricity Road, circuit is simple, control is easy.

To achieve the above objectives, the technical scheme adopted by the utility model is that：A kind of remote control LED bulb lamp circuit, including LED module, switching circuit and decompression constant-current circuit,

The decompression constant-current circuit is used to be converted to DC voltage V1 the low-voltage DC VDC of suitable LED module work, The decompression constant-current circuit connects the LED module；

The switching circuit, the switching circuit have common end G1, power source supply end VD and switch control signal SW, institute The output end that switching circuit connects the LED module is stated, and the switching circuit is used to, according to switch control signal SW, control institute State decompression constant-current circuit working condition, and drag down simultaneously power source supply end VD voltage and common end G1 voltage when, shutdown The power supply of LED module.

Based on the above technical solution, the switching circuit includes diode D10, resistance R28 and switching tube Q5, institute State the anode connection common end G1 of diode D10, the cathode of the diode D10 connect simultaneously the resistance R28 one end and Power source supply end VD, the other end of the resistance R28 connect the drain electrode of the diode D10, and the grid of the diode D10 connects The switch control signal SW is met, the source electrode of the diode D10 connects the LED module.

Based on the above technical solution, the decompression constant-current circuit uses the Constant Electric Current of BUCK topological circuit structures Road.

Based on the above technical solution, the decompression constant-current circuit include driving chip U1, resistance R1, resistance R2, Resistance Rs1, capacitance C2, capacitance C3, capacitance C4, diode D1 and inductance TR1, the driving chip U1 pin 1 connect it is described One end of capacitance C2, pin 2 connect one end of the resistance R1 and resistance R2 simultaneously, and pin 3 connects one end of capacitance C3, draws Foot 4 connects the cathode of one end and diode D1 of resistance Rs1 simultaneously, the plus earth of the diode D1, pin 5 and pin The other end of 6 input direct-current voltage V1, resistance Rs1 simultaneously connects pin 8, the other end of the capacitance C2, the capacitance C3 The other end of one end of the other end, the other end of resistance R2 and inductance TR1, inductance TR1 connects the another of the resistance R1 simultaneously The input terminal at end, one end of capacitance C4 and LED module, the other end of the capacitance C4 connect the output of the LED module simultaneously End and ground.

Based on the above technical solution, the inductance TR1 works in quasi-resonant mode；The driving chip U1 is floating Ground common end.

Based on the above technical solution, the resistance R1 and resistance R2 constitute voltage feedback circuit, the resistance Rs1 For electric current inductive reactance, the capacitance C2 is filtering and decoupling capacitor, and the capacitance C3 is compensating electric capacity, and the capacitance C4 is Filter capacitor, the diode D1 are afterflow diode.

Based on the above technical solution, the switching tube is field-effect transistor or bipolar transistor.

Compared with prior art, the utility model has the advantage of：

A kind of voltage and public affairs by dragging down power source supply end VD simultaneously of the remote control LED bulb lamp circuit of the utility model The voltage for holding G1 altogether turns off the power supply of LED module, and circuit is simple, the area of occupancy PCB circuit board is small, and control is easier, It is at low cost.

Description of the drawings

Fig. 1 is the circuit diagram of the utility model embodiment.

In figure：1-LED modules, 2- switching circuits, 3- are depressured constant-current circuit.

Specific implementation mode

The utility model is described in further detail with reference to the accompanying drawings and embodiments.

It is shown in Figure 1, a kind of remote control LED bulb lamp circuit of the utility model embodiment offer, including LED module 1, Switching circuit 2 and decompression constant-current circuit 3, wherein

Decompression constant-current circuit 3 is used to DC voltage V1 being converted to the low-voltage DC VDC that suitable LED module 1 works, and drops Constant-current circuit 3 is pressed to connect LED module 1, decompression constant-current circuit 3 uses the constant-current circuit of BUCK topological circuit structures.

Decompression constant-current circuit 3 in the present embodiment include driving chip U1, resistance R1, resistance R2, resistance Rs1, capacitance C2, Capacitance C3, capacitance C4, diode D1 and inductance TR1, wherein inductance TR1 works in quasi-resonant mode, and driving chip U1 is floating ground Common end, resistance R1 and resistance R2 constitute voltage feedback circuit, and resistance Rs1 is electric current inductive reactance, and capacitance C2 is filtering and goes Coupling capacitance, capacitance C3 are compensating electric capacity, and capacitance C4 is filter capacitor, and diode D1 is afterflow diode.

The pin of driving chip U1 and resistance R1, resistance R2, resistance Rs1, capacitance C2, capacitance C3, capacitance C4, diode D1 As follows with inductance TR1 connection relations, the pin 1 of driving chip U1 connects one end of capacitance C2, pin 2 connect simultaneously resistance R1 with One end of resistance R2, pin 3 connect one end of capacitance C3, and pin 4 connects one end of resistance Rs1 and bearing for diode D1 simultaneously Pole, the plus earth of diode D1, the other end of pin 5 and pin 6 input direct-current voltage V1, resistance Rs1 connect simultaneously to be drawn One end of foot 8, the other end of capacitance C2, the other end of capacitance C3, the other end of resistance R2 and inductance TR1, inductance TR1's is another One end simultaneously connect the other end of resistance R1, one end and LED modules 1 of capacitance C4 input terminal, the other end of capacitance C4 is simultaneously Connect the output end and ground of LED module 1.

There is switching circuit 2 common end G1, power source supply end VD and switch control signal SW, switching circuit 2 to connect LED moulds The output end of group 1, and switching circuit 2 is used for according to switch control signal SW, the working condition of control decompression constant-current circuit 3.This Switching circuit 2 in embodiment includes diode D10, resistance R28 and switching tube Q5, the anode connection common end of diode D10 The cathode of G1, diode D10 connect one end and the power source supply end VD of resistance R28 simultaneously, and the other end of resistance R28 connects two poles The grid connecting valve of the drain electrode of pipe D10, diode D10 controls signal SW, the source electrode connection LED modules 1 of diode D10. Wherein, switching tube is field-effect transistor or bipolar transistor.Resistance R28 is used for reducing flowing through switching tube in the present embodiment The current spike of Q5 so that switching tube Q5 working conditions are normal, and inductance TR1 and capacitance C4 store many energy, and power supply The voltage of feed end VD and common end G1 are all very high, if buffered without resistance R28, switch control signal SW is turned to high by low pressure When pressure, switching tube Q5 turns to conducting by cut-off, and switching tube Q5 is necessarily impacted by powerful current spike, once current spike More than the limiting value of switching tube Q5, switching tube Q5 can damage timeliness quickly, and therefore, resistance R28 is essential.Diode D10 is the voltage VD for back clamping power source supply end VD, when switch control signal SW turns to high pressure by low pressure, switching tube Q5 turns to conducting by cut-off, and the voltage VD of power source supply end VD is pulled low, and the voltage VD of power source supply end VD is less than common end G1 Voltage.When diode D10 strives for installation, the value of the voltage of voltage-common end G1 of source feed end VD is equal to diode The VF values of D10, protection driving chip normal work.

The course of work is as follows：

When being depressured constant-current circuit 3 and working normally, the voltage of the power source supply end VD of switching circuit 2 is higher than common end G1, and two Pole pipe D1 is reverse-biased, and driving chip U1 work does not influence；When switch control signal SW is low, switching tube Q5 cut-offs, switch electricity The voltage of the power source supply end VD on road 2 is higher than common end G1, and diode D1 is reverse-biased, and driving chip U1 work does not influence；When opening When pass control signal SW is high, switching tube Q5 conductings, by resistance R28 by the voltage pull-down of power source supply end VD, while will be public The voltage of the voltage pull-down of end G1 altogether, power source supply end VD and common end G1 are almost equal with the voltage of ground GND, force driving Chip U1 cannot work, and then cannot be that LED module 1 provides power supply.

The utility model is not limited to the above embodiment, for those skilled in the art, not Under the premise of being detached from the utility model principle, several improvements and modifications can also be made, these improvements and modifications are also considered as this reality Within novel protection domain.The content not being described in detail in this specification belongs to well known to professional and technical personnel in the field The prior art.

Claims (7)

1. a kind of remote control LED bulb lamp circuit, it is characterised in that：Including LED module, switching circuit and it is depressured constant-current circuit,

The decompression constant-current circuit is used to be converted to DC voltage V1 the low-voltage DC VDC of suitable LED module work, described It is depressured constant-current circuit and connects the LED module；

The switching circuit, the switching circuit has common end G1, power source supply end VD and switch control signal SW, described to open Powered-down road connects the output end of the LED module, and the switching circuit is used to, according to switch control signal SW, control the drop Press constant-current circuit working condition, and drag down simultaneously power source supply end VD voltage and common end G1 voltage when, turn off LED moulds The power supply of group.

2. a kind of remote control LED bulb lamp circuit as described in claim 1, it is characterised in that：The switching circuit includes two poles The anode connection common end G1 of pipe D10, resistance R28 and switching tube Q5, the diode D10, the cathode of the diode D10 are same When connect one end of the resistance R28 and the other end of power source supply end VD, the resistance R28 connect the diode D10's The grid of drain electrode, the diode D10 connects the switch control signal SW, and the source electrode of the diode D10 connects the LED Module.

3. a kind of remote control LED bulb lamp circuit as described in claim 1, it is characterised in that：The decompression constant-current circuit uses The constant-current circuit of BUCK topological circuit structures.

4. a kind of remote control LED bulb lamp circuit as claimed in claim 3, it is characterised in that：

The decompression constant-current circuit includes driving chip U1, resistance R1, resistance R2, resistance Rs1, capacitance C2, capacitance C3, capacitance C4, diode D1 and inductance TR1, the pin 1 of the driving chip U1 connect one end of the capacitance C2, and pin 2 connects simultaneously One end of the resistance R1 and resistance R2, pin 3 connect one end of capacitance C3, and pin 4 connects one end and two of resistance Rs1 simultaneously The cathode of pole pipe D1, the plus earth of the diode D1,6 input direct-current voltage V1 of pin 5 and pin, resistance Rs1's is another It holds while connecting pin 8, the other end of the capacitance C2, the other end of the capacitance C3, the other end of resistance R2 and inductance TR1 One end, the other end of inductance TR1 connects the other end, one end of capacitance C4 and the input of LED module of the resistance R1 simultaneously End, the other end of the capacitance C4 connect the output end and ground of the LED module simultaneously.

5. a kind of remote control LED bulb lamp circuit as claimed in claim 4, it is characterised in that：

The inductance TR1 works in quasi-resonant mode；The driving chip U1 is floating ground common end.

6. a kind of remote control LED bulb lamp circuit as claimed in claim 4, it is characterised in that：

The resistance R1 and resistance R2 constitutes voltage feedback circuit, and the resistance Rs1 is electric current inductive reactance, and the capacitance C2 is Filtering and decoupling capacitor, the capacitance C3 are compensating electric capacity, and the capacitance C4 is filter capacitor, and the diode D1 is afterflow two Grade pipe.

7. a kind of remote control LED bulb lamp circuit as claimed in claim 2, it is characterised in that：

The switching tube is field-effect transistor or bipolar transistor.