CN108834264A - A kind of LED light strip driving circuit with automatic adjustment power - Google Patents
A kind of LED light strip driving circuit with automatic adjustment power Download PDFInfo
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- CN108834264A CN108834264A CN201810853550.6A CN201810853550A CN108834264A CN 108834264 A CN108834264 A CN 108834264A CN 201810853550 A CN201810853550 A CN 201810853550A CN 108834264 A CN108834264 A CN 108834264A
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- resistance
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/395—Linear regulators
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
A kind of LED light strip driving circuit with automatic adjustment power, there is the external LED light strip of several resistance and lamp bead including internal parallel, it further include having the impedance for capableing of automatic identification resistance and the AD signal recognition circuit that adjusts its current duty cycle and providing the power supply chip circuit of power supply for external LED light strip, the AD signal recognition circuit and power supply chip circuit connection, the present invention provides a kind of LED light strip driving circuit with automatic adjustment power, it being capable of automatic identification duty cycle mode adjusting power, automatic detection lamp bead and number, it is corresponding with lamp bead power to realize that lamp bead is detected rear automated power (by adjusting current-mode).
Description
Technical field
Invention is related to LED lamp drive circuit field, espespecially a kind of LED light strip driving circuit with automatic adjustment power.
Background technique
For cost consideration, the driving circuit of existing LED light strip is simpler, general only to have fusing and rectifying device,
When in power network fluctuation, voltage is more than 220V, the virtual voltage of LED can be more than voltage rating in light bar, will necessarily if things go on like this make
The adverse effect to shorten at LED life；Although having there is the problem of Switching Power Supply is able to solve voltage ripple of power network in the industry, open
The cost in powered-down source is excessively high, and ordinary lamps band client is unbearable, it would therefore be highly desirable to solve the driving problems of LED light strip；
This following disadvantage is existed simultaneously in existing technology：
1. resistance constant current loss is big, light efficiency is poor；
2. changed power is big, temperature is increased；
3. unprotect route；
4. traditional output voltage is up to 300V, High voltage output electricity people is severe, and there are security risks.
Summary of the invention
To solve the above problems, invention provides a kind of LED light strip driving circuit with automatic adjustment power, it can be automatic
Identify duty cycle mode adjusting power, automatic to detect lamp bead and number, automated power is (by adjusting current-mode after realization lamp bead is detected
Formula) it is corresponding with lamp bead power.
To achieve the above object, invention the technical solution adopted is that：A kind of LED light strip driving with automatic adjustment power
Circuit has the external LED light strip of several resistance and lamp bead including internal parallel, further includes having the resistance for capableing of automatic identification resistance
Resist and adjusts the AD signal recognition circuit of its current duty cycle and provide the power supply chip circuit of power supply, institute for external LED light strip
It states AD signal recognition circuit to connect with the resistance inside external LED light strip, the AD signal recognition circuit and power supply chip circuit
Connection, the power supply chip circuit and external LED light band connection.
Wherein, the AD signal recognition circuit includes AD signal identification single-chip microcontroller (IC3), the 28th resistance (R28),
26 resistance (R26), the 14th resistance (R14), the 9th capacitor (C9), the 28th resistance (R28) and AD signal are known
Other single-chip microcontroller (I C3) connection, the end VOUT of the AD signal identification single-chip microcontroller (IC3) are connect with the 26th resistance (R26),
The SW of the AD signal identification single-chip microcontroller (IC3) passes through the 14th resistance (R14), the 9th capacitor (C9) correspondence and signal ground respectively
Line connection.
Wherein, the AD signal recognition circuit further includes having integrated package inductance coil (L3), three-terminal voltage-stabilizing pipe (KP1),
12 resistance (R12), the 11st diode (D11), the 7th diode (D7), the 8th capacitor (C8), the 7th capacitor (C7), it is described
The vdd terminal of AD signal identification single-chip microcontroller (I C3) by inductance coil (L3), twelfth resistor (R12) three series connection after with three ends
The end CS of voltage-stabiliser tube (KP1) connects, and the vdd terminal of the three-terminal voltage-stabilizing pipe (KP1) passes through the 8th capacitor (C8) and the 7th diode
(D7) negative pole end connection, the positive terminal of the 7th diode (D7) with signal ground by connecting, the three-terminal voltage-stabilizing pipe
(KP1) vdd terminal is connect with the negative pole end of the 11st diode (D11), and the positive terminal of the 11st diode (D11) passes through
7th capacitor (C7) is connect with signal ground.
Wherein, the power supply chip circuit include the power supply chip circuit include transformer (L9), first resistor (R1),
Second resistance (R2), 3rd resistor (R3), the 21st resistance (R21), the 22nd resistance (R22), the 23rd resistance
(R23), the 25th resistance (R25), the 6th diode (D6), third polar capacitor (C3), the 15th polar capacitor (C15),
The positive and negative anodes correspondence of 5th polar capacitor (C5), the 4th capacitor (C4), the 15th polar capacitor (C15) is connected in parallel on third pole
Property capacitor (C3) positive and negative anodes on, one end of the first resistor (R1) is connect with the anode of third polar capacitor (C3), described
The positive terminal of the other end of first resistor (R1), second resistance (R2), 3rd resistor (R3) and the 5th polar capacitor (C5)
Between connect, the negative pole end of the 5th polar capacitor (C5) ground connection, the other end of the 22nd resistance (R22), second
It connects between 15 resistance (R25), the 23rd resistance (R23) three, one end ground connection of the 23rd resistance (R23),
3 ends of the transformer (L9) pass through between the 6th diode (D6), the 4th capacitor (C4) and the 21st resistance (R21) three
It is grounded after series connection, the 4 ends ground connection of the transformer (L9).
Wherein, the power supply chip circuit further includes having power regulation single-chip microcontroller (IC1), photoelectrical coupler (I C2),
24 resistance (R24), the 19th resistance (R19), the 20th resistance (R20), resistance (R0), the 49th resistance (R49),
Five resistance (R5), the 6th resistance (R6), the second diode (D2), the 39th diode (D39), field-effect tube (Q1), it is described
3 ends of transformer (L9) are connect with 2 ends of field-effect tube (Q1), 3 ends of the field-effect tube (Q1) pass through respectively resistance (R0),
5th resistance (R5) ground connection, 3 ends of the field-effect tube (Q1) are connect with the end CS of power regulation single-chip microcontroller (I C1), the field
1 end of effect pipe (Q1) passes through the 49th resistance (R49), the 39th diode (D39) and power regulation single-chip microcontroller respectively
The end GATE of (I C1) connects, and the vdd terminal of the power regulation single-chip microcontroller (IC1) is grounded by the 6th resistance (R6), the function
Rate adjusts the end the GND ground connection of single-chip microcontroller (I C1), and the end FB of the power regulation single-chip microcontroller (IC1) passes through the 19th resistance respectively
(R19), the 20th resistance (R20) is connect with 3 ends of ground, the transformer (L9), the D of the power regulation single-chip microcontroller (IC1)
The end IM is connect by the 24th resistance (R24) with the C-terminal of photoelectrical coupler (IC2), the end E of the photoelectrical coupler (IC2)
Ground connection, the S termination signal ground wire of the photoelectrical coupler (IC2).
Wherein, the model WS8125 of the power regulation single-chip microcontroller (IC1).
Advantageous effect of the invention is：The input of power regulation single-chip microcontroller is connected in parallel on the resistance of light bar uppermost resistive by identification
It is anti-, adjust the size of the duty ratio control power supply chip l ed electric current of output pin, and have it is following a little：1. full load
Efficiency is up to 96% or more, environmentally protective；2. have digital circuit changes power functions automatically, with the linear multiplying power function of digital circuit
Rate variation；3. the characteristics of protection circuit, has the function of output short circuit protection, no-load protection, overpower protection；4. output voltage
It is low, in addition to not wearing shoes operation, output touch will not electric people, even if not wearing shoes operation is also very slight electric people, safety
Coefficient is high.
Detailed description of the invention
Fig. 1 is work flow diagram of the invention.
Fig. 2 is the schematic diagram of AD signal recognition circuit.
Fig. 3 is the schematic diagram of power supply chip circuit.
Specific embodiment
It please refers to shown in Fig. 1-3, invention is including interior about a kind of LED light strip driving circuit with automatic adjustment power
Portion is parallel with the external LED light strip of several resistance and lamp bead, further includes having the impedance for capableing of automatic identification resistance and adjusting it
The AD signal recognition circuit of current duty cycle and the power supply chip circuit of power supply is provided for external LED light strip, the AD signal is known
Other circuit is connect with the resistance inside external LED light strip, the AD signal recognition circuit and power supply chip circuit connection, the electricity
Source chip circuit and external LED light band connection.
Compared to existing technologies, the present invention is by using the AD that can automatically adjust current duty cycle after signal identification
Signal recognition circuit and power supply chip circuit realize that the electric current to output external LED light bar is adjusted, and realizes with higher
Full load efficiency.
Wherein, the AD signal recognition circuit includes AD signal identification single-chip microcontroller (IC3), the 28th resistance (R28),
26 resistance (R26), the 14th resistance (R14), the 9th capacitor (C9), the 28th resistance (R28) and AD signal are known
The end NC of other single-chip microcontroller (I C3) is connected, the end VOUT of the AD signal identification single-chip microcontroller (IC3) and the 26th resistance (R26)
Connection, the SW of the AD signal identification single-chip microcontroller (IC3) pass through respectively the 14th resistance (R14), the 9th capacitor (C9) it is corresponding with
Signal ground connection.
Using the above scheme, AD signal identification single-chip microcontroller (IC3), which can identify, is connected in parallel on external LED light strip internal resistance
Impedance after automatic identification impedance, exports the power tune on a square wave control power supply chip circuit according to the size of impedance automatically
The output power for saving single-chip microcontroller (IC1), to automatically adjust the electric current for exporting external LED light strip.
Wherein, the AD signal recognition circuit further includes having integrated package inductance coil (L3), three-terminal voltage-stabilizing pipe (KP1),
12 resistance (R12), the 11st diode (D11), the 7th diode (D7), the 8th capacitor (C8), the 7th capacitor (C7), it is described
The vdd terminal of AD signal identification single-chip microcontroller (I C3) by inductance coil (L3), twelfth resistor (R12) three series connection after with three ends
The end CS of voltage-stabiliser tube (KP1) connects, and the vdd terminal of the three-terminal voltage-stabilizing pipe (KP1) passes through the 8th capacitor (C8) and the 7th diode
(D7) negative pole end connection, the positive terminal of the 7th diode (D7) with signal ground by connecting, the three-terminal voltage-stabilizing pipe
(KP1) vdd terminal is connect with the negative pole end of the 11st diode (D11), and the positive terminal of the 11st diode (D11) passes through
7th capacitor (C7) is connect with signal ground.
Wherein, the power supply chip circuit include the power supply chip circuit include transformer (L9), first resistor (R1),
Second resistance (R2), 3rd resistor (R3), the 21st resistance (R21), the 22nd resistance (R22), the 23rd resistance
(R23), the 25th resistance (R25), the 6th diode (D6), third polar capacitor (C3), the 15th polar capacitor (C15),
The positive and negative anodes correspondence of 5th polar capacitor (C5), the 4th capacitor (C4), the 15th polar capacitor (C15) is connected in parallel on third pole
Property capacitor (C3) positive and negative anodes on, one end of the first resistor (R1) is connect with the anode of third polar capacitor (C3), described
The positive terminal of the other end of first resistor (R1), second resistance (R2), 3rd resistor (R3) and the 5th polar capacitor (C5)
Between connect, the negative pole end of the 5th polar capacitor (C5) ground connection, the other end of the 22nd resistance (R22), second
It connects between 15 resistance (R25), the 23rd resistance (R23) three, one end ground connection of the 23rd resistance (R23),
3 ends of the transformer (L9) pass through between the 6th diode (D6), the 4th capacitor (C4) and the 21st resistance (R21) three
It is grounded after series connection, the 4 ends ground connection of the transformer (L9).
Wherein, the power supply chip circuit further includes having power regulation single-chip microcontroller (IC1), photoelectrical coupler (I C2),
24 resistance (R24), the 19th resistance (R19), the 20th resistance (R20), resistance (R0), the 49th resistance (R49),
Five resistance (R5), the 6th resistance (R6), the second diode (D2), the 39th diode (D39), field-effect tube (Q1), it is described
3 ends of transformer (L9) are connect with 2 ends of field-effect tube (Q1), 3 ends of the field-effect tube (Q1) pass through respectively resistance (R0),
5th resistance (R5) ground connection, 3 ends of the field-effect tube (Q1) are connect with the end CS of power regulation single-chip microcontroller (I C1), the field
1 end of effect pipe (Q1) passes through the 49th resistance (R49), the 39th diode (D39) and power regulation single-chip microcontroller respectively
The end GATE of (I C1) connects, and the vdd terminal of the power regulation single-chip microcontroller (IC1) is grounded by the 6th resistance (R6), the function
Rate adjusts the end the GND ground connection of single-chip microcontroller (I C1), and the end FB of the power regulation single-chip microcontroller (IC1) passes through the 19th resistance respectively
(R19), the 20th resistance (R20) is connect with 3 ends of ground, the transformer (L9), the D of the power regulation single-chip microcontroller (IC1)
The end IM is connect by the 24th resistance (R24) with the C-terminal of photoelectrical coupler (IC2), the end E of the photoelectrical coupler (IC2)
Ground connection, the S termination signal ground wire of the photoelectrical coupler (IC2).
Using the above scheme, AD signal identification single-chip microcontroller (IC3) has digital circuit and changes power functions automatically, with number
The numerical value of variation is transmitted on power regulation single-chip microcontroller (IC1) by circuit linearity multiplying power changed power, realizes power regulation monolithic
The characteristics of machine (IC1) automatically adjusts the function of duty ratio, and realization can limit maximum output current, protection circuit, tool
There is the function of output short circuit protection, no-load protection, overpower protection；Output voltage is low, and in addition to not wearing shoes operation, output is touched
To will not electric people, even if not wearing shoes operation is also very slight electric people, safety coefficient is high.
Wherein, the model WS8125 of the power regulation single-chip microcontroller (IC1).
Embodiment of above is only that the preferred embodiment of invention is described, and is not limited the range of invention
Fixed, under the premise of not departing from invention design spirit, this field ordinary engineering and technical personnel makes the technical solution of invention
Various changes and improvements should all be fallen into the protection scope of claims determination of invention.
Claims (6)
1. a kind of LED light strip driving circuit with automatic adjustment power has several resistance and lamp bead including internal parallel
External LED light strip, it is characterised in that：It further include the AD letter for having the impedance for capableing of automatic identification resistance and adjusting its current duty cycle
Number identification circuit and the power supply chip circuit of power supply, the AD signal recognition circuit and external LED light are provided for external LED light strip
Connected with internal resistance, the AD signal recognition circuit and power supply chip circuit connection, the power supply chip circuit with it is external
LED light band connection.
2. a kind of LED light strip driving circuit with automatic adjustment power according to claim 1, it is characterised in that：Institute
Stating AD signal recognition circuit includes AD signal identification single-chip microcontroller (I C3), the 28th resistance (R28), the 26th resistance
(R26), the 14th resistance (R14), the 9th capacitor (C9), the 28th resistance (R28) and AD signal identification single-chip microcontroller (I
C3 it) connects, the 28th resistance (R28) connect with the resistance inside external LED light strip, the AD signal identification single-chip microcontroller
(I C3) is connect with the 26th resistance (R26), and the AD signal identification single-chip microcontroller (I C3) passes through the 14th resistance respectively
(R14), the 9th capacitor (C9) correspondence is connect with signal ground.
3. a kind of LED light strip driving circuit with automatic adjustment power according to claim 1, it is characterised in that：Institute
Stating AD signal recognition circuit further includes having integrated package inductance coil (L3), three-terminal voltage-stabilizing pipe (KP1), twelfth resistor (R12),
11 diodes (D11), the 7th diode (D7), the 8th capacitor (C8), the 7th capacitor (C7), the AD signal identification single-chip microcontroller
The vdd terminal of (I C3) passes through the CS after inductance coil (L3), twelfth resistor (R12) three series connection with three-terminal voltage-stabilizing pipe (KP1)
The vdd terminal of end connection, the three-terminal voltage-stabilizing pipe (KP1) is connected by the negative pole end of the 8th capacitor (C8) and the 7th diode (D7)
Connect, the positive terminal of the 7th diode (D7) by being connect with signal ground, the vdd terminal of the three-terminal voltage-stabilizing pipe (KP1) with
The negative pole end of 11st diode (D11) connects, the positive terminal of the 11st diode (D11) by the 7th capacitor (C7) with
Signal ground connection.
4. a kind of LED light strip driving circuit with automatic adjustment power according to claim 1, it is characterised in that：Institute
It includes transformer (L9), first resistor (R1), second resistance (R2), that state power supply chip circuit, which include the power supply chip circuit,
Three resistance (R3), the 21st resistance (R21), the 22nd resistance (R22), the 23rd resistance (R23), the 25th resistance
(R25), the 6th diode (D6), third polar capacitor (C3), the 15th polar capacitor (C15), the 5th polar capacitor (C5),
Four capacitors (C4), the corresponding positive and negative anodes for being connected in parallel on third polar capacitor (C3) of the positive and negative anodes of the 15th polar capacitor (C15)
On, one end of the first resistor (R1) is connect with the anode of third polar capacitor (C3), the first resistor (R1) it is another
It connects between end, second resistance (R2), 3rd resistor (R3) and the positive terminal of the 5th polar capacitor (C5), the 5th pole
Property capacitor (C5) negative pole end ground connection, the other end, the 25th resistance (R25), the 20th of the 22nd resistance (R22)
It connects between three resistance (R23) three, one end ground connection of the 23rd resistance (R23), 3 ends of the transformer (L9) lead to
It crosses between the 6th diode (D6), the 4th capacitor (C4) and the 21st resistance (R21) three after connecting and is grounded, the transformer
(L9) 4 ends ground connection.
5. a kind of LED light strip driving circuit with automatic adjustment power according to claim 4, it is characterised in that：Institute
Stating power supply chip circuit further includes having power regulation single-chip microcontroller (I C1), photoelectrical coupler (I C2), the 24th resistance
(R24), the 19th resistance (R19), the 20th resistance (R20), resistance (R0), the 49th resistance (R49), the 5th resistance
(R5), the 6th resistance (R6), the second diode (D2), the 39th diode (D39), field-effect tube (Q1), the transformer
(L9) 3 ends are connect with 2 ends of field-effect tube (Q1), and 3 ends of the field-effect tube (Q1) pass through resistance (R0), the 5th electricity respectively
(R5) ground connection is hindered, 3 ends of the field-effect tube (Q1) are connect with the end CS of power regulation single-chip microcontroller (I C1), the field-effect tube
(Q1) 1 end passes through the 49th resistance (R49), the 39th diode (D39) and power regulation single-chip microcontroller (I C1) respectively
Connection, the power regulation single-chip microcontroller (I C1) are grounded by the 6th resistance (R6), the power regulation single-chip microcontroller (I C1)
The end GND ground connection, the power regulation single-chip microcontroller (I C1) respectively by the 19th resistance (R19), the 20th resistance (R20) with
The 3 ends connection on ground, the transformer (L9), the power regulation single-chip microcontroller (I C1) pass through the 24th resistance (R24) and light
The C-terminal of electric coupler (I C2) connects, the end the E ground connection of the photoelectrical coupler (I C2), the S of the photoelectrical coupler (I C2)
Termination signal ground wire.
6. a kind of LED light strip driving circuit with automatic adjustment power according to claim 5, it is characterised in that：Institute
State the model WS8125 of power regulation single-chip microcontroller (I C1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810853550.6A CN108834264A (en) | 2018-07-30 | 2018-07-30 | A kind of LED light strip driving circuit with automatic adjustment power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810853550.6A CN108834264A (en) | 2018-07-30 | 2018-07-30 | A kind of LED light strip driving circuit with automatic adjustment power |
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| CN108834264A true CN108834264A (en) | 2018-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810853550.6A Pending CN108834264A (en) | 2018-07-30 | 2018-07-30 | A kind of LED light strip driving circuit with automatic adjustment power |
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| CN208572507U (en) * | 2018-07-30 | 2019-03-01 | 中山市蓝德电子有限公司 | A LED strip drive circuit with automatic power adjustment |
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Application publication date: 20181116 |
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