CN104869724A - Symmetrical voltage-stabilizing oscillation LED drive system based on bootstrapping control - Google Patents
Symmetrical voltage-stabilizing oscillation LED drive system based on bootstrapping control Download PDFInfo
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Abstract
The invention discloses a symmetrical voltage-stabilizing oscillation LED drive system based on bootstrapping control, and the system mainly comprises a rectification filter circuit, a drive circuit connected with the output end of the rectification filter circuit, and a voltage-stabilizing circuit. The system is characterized in that a bootstrapping circuit is disposed between the drive circuit and the voltage-stabilizing circuit; and the rectification filter circuit is provided with a symmetrical voltage-stabilizing oscillation circuit. The system can reduce the impact on the circuit from power supply oscillation well, enables an operation voltage of the circuit to be more stable, is provided with the bootstrapping circuit, can effectively improve the loading capability, and can drive more LED lamp groups, so as to meet the demands of persons.
Description
Technical field
The present invention relates to a kind of drive system, specifically refer to a kind of symmetrical expression voltage stabilizing vibration LED drive system controlled based on bootstrapping.
Background technology
LED, as novel energy-conserving light source, with its environmental protection, the feature such as energy-conservation, the life-span is long, volume is little, is extensively received by people and adopts.Due to the semiconductor device that LED is characteristic sensitivity, have negative temperature characteristic again, therefore in application process, LED drive circuit plays considerable effect for impelling LED to be in stable, reliable operating state.
Along with people's living standard constantly improves, no matter have higher requirement to LED brightness and energy consumption at home or in shop, namely people need, while improving LED brightness further, to need LED to have lower energy consumption.So people just have higher requirement to LED lamp drive circuit.But its load capacity of traditional LED drive system that current people adopt is very limited, can not meet the requirement of people.
Summary of the invention
The object of the invention is to overcome the very limited defect of current LED driving system loads ability, a kind of symmetrical expression voltage stabilizing vibration LED drive system controlled based on bootstrapping that can promote load capacity is provided.
Object of the present invention is achieved through the following technical solutions:
Based on the symmetrical expression voltage stabilizing vibration LED drive system that bootstrapping controls, mainly comprise current rectifying and wave filtering circuit, the drive circuit be connected with rectification filter circuit output end, voltage stabilizing circuit, between drive circuit and voltage stabilizing circuit, be also provided with boostrap circuit, current rectifying and wave filtering circuit is also provided with symmetrical expression steady voltage periodic circuit, described symmetrical expression steady voltage periodic circuit is by triode VT101, triode VT102, triode VT103, triode VT104, triode VT105, triode VT106, triode VT107, triode VT108, N pole is connected with the collector electrode of triode VT102, the diode D102 that P pole is connected with the collector electrode of triode VT102 after inductance L 102, negative pole is connected with the P pole of diode D102, the electric capacity C102 that positive pole is connected with the N pole of diode D102 after diode D101, positive pole is connected with the N pole of diode D102, the electric capacity C101 that negative pole is connected with the positive pole of electric capacity C102, positive pole is connected with the P pole of diode D102 after inductance L 101, the electric capacity C103 that negative pole is connected with the collector electrode of triode VT102, negative pole is connected with the base stage of triode VT102, the electric capacity C104 that positive pole is connected with the collector electrode of triode VT101 after resistance R101, the resistance R102 in parallel with electric capacity C104, one end is connected with the emitter of triode VT102, the resistance R104 of other end ground connection, the electric capacity C105 in parallel with resistance R104, N pole is connected with the negative pole of electric capacity C101, the diode D103 that P pole is connected with the base stage of triode VT103 after diode D104, one end is connected with the base stage of triode VT101, the resistance R103 that the other end is connected with the base stage of triode VT103 after resistance R105, be serially connected in the electric capacity C106 between the base stage of triode VT103 and collector electrode, one end is connected with the N pole of diode D103, the resistance R107 that the other end is connected with the emitter of triode VT103, N pole is connected with the emitter of triode VT103, the diode D105 that P pole is connected with the N pole of diode D103 after resistance R108, one end is connected with the N pole of diode D105, the resistance R109 that the other end is connected with the collector electrode of triode VT103, P pole is connected with the collector electrode of triode VT103, the voltage stabilizing didoe D107 that N pole is connected with the collector electrode of triode VT3 after electric capacity C107, N pole is connected with the P pole of voltage stabilizing didoe D107, the diode D106 that P pole is connected with the N pole of voltage stabilizing didoe D107 after resistance R106, the electric capacity C110 in parallel with voltage stabilizing didoe D107, one end is connected with the base stage of triode VT108, the resistance R114 that the other end is connected with the N pole of voltage stabilizing didoe D107, positive pole is connected with the base stage of triode VT104, the electric capacity C108 that negative pole is connected with the base stage of triode VT105, one end is connected with the emitter of triode VT105, the resistance R110 that the other end is connected with the positive pole of electric capacity C108, one end is connected with the emitter of triode VT104, the resistance R111 that the other end is connected with the negative pole of electric capacity C108, be serially connected in the resistance R112 between the collector electrode of triode VT104 and the collector electrode of triode VT105, the electric capacity C109 in parallel with resistance R112, one end is connected with the positive pole of electric capacity C108, the resistance R112 that the other end is connected with the collector electrode of triode VT106, and one end is connected with the negative pole of electric capacity C108, the resistance R113 that the other end is connected with the collector electrode of triode VT107 forms, wherein, the positive pole of electric capacity C103 is connected with the emitter of triode VT101, the collector electrode of triode VT102 is also connected with the base stage of triode VT103, the collector electrode of triode VT103 also with the base stage of triode VT106, the base stage of triode VT107 and the collector electrode of triode VT108 are connected, the N pole of voltage stabilizing didoe D107 is also connected with the tie point of resistance R105 with resistance R103, the positive pole of electric capacity C108 is connected with the P pole of diode D105, the collector electrode of triode VT104 is connected with the emitter of triode VT106, the collector electrode of triode VT105 is connected with the emitter of triode VT107, the emitter of triode VT108 is connected with the negative pole of electric capacity C108, the positive pole of electric capacity C102 and the N pole of voltage stabilizing didoe D107 form input, the negative pole of electric capacity C108 and the N pole of voltage stabilizing didoe D107 form output.
Described boostrap circuit is by triode VT1, field effect transistor Q, one end is connected with voltage stabilizing circuit with drive circuit simultaneously, the resistance R10 that the other end is then connected with the collector electrode of triode VT1, positive pole is connected with the emitter of triode VT1, the electric capacity C8 that negative pole is then connected with voltage stabilizing circuit, positive pole is connected with the source electrode of field effect transistor Q, the electric capacity C7 that negative pole is connected with the negative pole of electric capacity C8, one end is connected with the base stage of triode VT1, the resistance R6 of other end ground connection after resistance R8, positive pole is connected with the tie point of resistance R8 with resistance R6, the electric capacity C6 of negative pole ground connection after resistance R9, positive pole is connected with drive circuit, the electric capacity C5 that negative pole is then connected with the grid of field effect transistor Q, and one end is connected with the negative pole of electric capacity C5, the resistance R7 that the other end is then connected with the positive pole of electric capacity C6 forms, the drain electrode of described field effect transistor Q is connected with the base stage of triode VT1, and source electrode is connected with the negative pole of electric capacity C6.
Further, described current rectifying and wave filtering circuit is by fuse FU, and resistance R1, diode bridge rectifier U, electric capacity C1 form; Fuse FU is serially connected on an input of diode bridge rectifier U, resistance R1 is then serially connected on another input of diode bridge rectifier U, the positive and negative electrode of electric capacity C1 is then serially connected between two outputs of diode bridge rectifier U, the input of fuse is connected with the negative pole of electric capacity C108, and the input of resistance R1 is connected with the N pole of voltage stabilizing didoe D107.
Described drive circuit is by driving chip U1, diode D1, one end is connected with the K2 pin of driving chip U1, the electric capacity C2 that the other end is connected with the negative pole of electric capacity C1, one end is connected with the KS2 pin of driving chip U1, the resistance R3 that the other end is then connected with the negative pole of electric capacity C1, one end is connected with the KS1 pin of driving chip U1, the resistance R5 that the other end is then connected with the negative pole of electric capacity C1, one end is connected with the GND pin of driving chip U1, the electric capacity R2 of other end ground connection, one end is connected with the N pole of diode D1, the resistance R4 that the other end is connected with the CLK pin of driving chip U1 after electric capacity C3, and form with the electric capacity C4 that resistance R4 is in parallel, the N pole of described diode D1 is simultaneously with the positive pole of electric capacity C1 and resistance R10 is connected, its P pole is then connected with GR2 pin with the GR1 pin of driving chip U1 simultaneously, the DIO pin of driving chip U1 is connected with its K2 pin, and STB pin is then connected with the positive pole of electric capacity C5.
Described voltage stabilizing circuit comprises three terminal regulator U2, electric capacity C9, and electric capacity C10; The positive pole of electric capacity C9 is connected with the GND pin of three terminal regulator U2, minus earth, the positive pole of electric capacity C10 is connected with the OUT pin of three terminal regulator U2, negative pole is connected with the negative pole of electric capacity C8, and the IN pin of described three terminal regulator U2 is connected with the positive pole of electric capacity C4.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) overall structure of the present invention is very simple, not only makes and very easy to use, and stability is high.
(2) the present invention compares with traditional LED drive system and is provided with boostrap circuit, and it effectively can promote the load capacity of drive system, thus can drive more LED group, to meet the demand of people simultaneously.
(3) the present invention is provided with symmetrical expression steady voltage periodic circuit, can well reduce and supply electric oscillation on the impact of circuit, make the working voltage in circuit more stable.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the circuit diagram of symmetrical expression steady voltage periodic circuit of the present invention.
Description of reference numerals:
10, symmetrical expression steady voltage periodic circuit.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, 2, the present invention mainly comprises current rectifying and wave filtering circuit, the drive circuit be connected with rectification filter circuit output end, voltage stabilizing circuit, it is characterized in that: between drive circuit and voltage stabilizing circuit, be also provided with boostrap circuit, current rectifying and wave filtering circuit is also provided with symmetrical expression steady voltage periodic circuit 10.
Symmetrical expression steady voltage periodic circuit 10 is by triode VT101, triode VT102, triode VT103, triode VT104, triode VT105, triode VT106, triode VT107, triode VT108, resistance R101, resistance R102, resistance R103, resistance R104, resistance R105, resistance R106, resistance R107, resistance R108, resistance R109, resistance R110, resistance R111, resistance R112, resistance R113, resistance R114, electric capacity C101, electric capacity C102, electric capacity C103, electric capacity C104, electric capacity C105, electric capacity C106, electric capacity C107, electric capacity C108, electric capacity C109, electric capacity C1010, inductance L 101, inductance L 102, diode D101, diode D102, diode D103, diode D104, diode D105, diode D106, voltage stabilizing didoe D107.During connection, the N pole of diode D102 is connected with the collector electrode of triode VT102, P pole is connected with the collector electrode of triode VT102 after inductance L 102, the negative pole of electric capacity C102 is connected with the P pole of diode D102, positive pole is connected with the N pole of diode D102 after diode D101, the positive pole of electric capacity C101 is connected with the N pole of diode D102, negative pole is connected with the positive pole of electric capacity C102, the positive pole of electric capacity C103 is connected with the P pole of diode D102 after inductance L 101, negative pole is connected with the collector electrode of triode VT102, the negative pole of electric capacity C104 is connected with the base stage of triode VT102, positive pole is connected with the collector electrode of triode VT101 after resistance R101, resistance R102 is in parallel with electric capacity C104, one end of resistance R104 is connected with the emitter of triode VT102, other end ground connection, electric capacity C105 is in parallel with resistance R104, the N pole of diode D103 is connected with the negative pole of electric capacity C101, P pole is connected with the base stage of triode VT103 after diode D104, one end of resistance R103 is connected with the base stage of triode VT101, the other end is connected with the base stage of triode VT103 after resistance R105, between the base stage that electric capacity C106 is serially connected in triode VT103 and collector electrode, one end of resistance R107 is connected with the N pole of diode D103, the other end is connected with the emitter of triode VT103, the N pole of diode D105 is connected with the emitter of triode VT103, P pole is connected with the N pole of diode D103 after resistance R108, one end of resistance R109 is connected with the N pole of diode D105, the other end is connected with the collector electrode of triode VT103, the P pole of voltage stabilizing didoe D107 is connected with the collector electrode of triode VT103, N pole is connected with the collector electrode of triode VT3 after electric capacity C107, the N pole of diode D106 is connected with the P pole of voltage stabilizing didoe D107, P pole is connected with the N pole of voltage stabilizing didoe D107 after resistance R106, electric capacity C110 is in parallel with voltage stabilizing didoe D107, one end of resistance R114 is connected with the base stage of triode VT108, the other end is connected with the N pole of voltage stabilizing didoe D107, the positive pole of electric capacity C108 is connected with the base stage of triode VT104, negative pole is connected with the base stage of triode VT105, one end of resistance R110 is connected with the emitter of triode VT105, the other end is connected with the positive pole of electric capacity C108, one end of resistance R111 is connected with the emitter of triode VT104, the other end is connected with the negative pole of electric capacity C108, resistance R112 is serially connected between the collector electrode of triode VT104 and the collector electrode of triode VT105, electric capacity C109 is in parallel with resistance R112, one end of resistance R112 is connected with the positive pole of electric capacity C108, the other end is connected with the collector electrode of triode VT106, one end of resistance R113 is connected with the negative pole of electric capacity C108, the other end is connected with the collector electrode of triode VT107, wherein, the positive pole of electric capacity C103 is connected with the emitter of triode VT101, the collector electrode of triode VT102 is also connected with the base stage of triode VT103, the collector electrode of triode VT103 also with the base stage of triode VT106, the base stage of triode VT107 and the collector electrode of triode VT108 are connected, the N pole of voltage stabilizing didoe D107 is also connected with the tie point of resistance R105 with resistance R103, the positive pole of electric capacity C108 is connected with the P pole of diode D105, the collector electrode of triode VT104 is connected with the emitter of triode VT106, the collector electrode of triode VT105 is connected with the emitter of triode VT107, the emitter of triode VT108 is connected with the negative pole of electric capacity C108, the positive pole of electric capacity C102 and the N pole of voltage stabilizing didoe D107 form input, the negative pole of electric capacity C108 and the N pole of voltage stabilizing didoe D107 form output.
This boostrap circuit is by triode VT1, field effect transistor Q, one end is connected with voltage stabilizing circuit with drive circuit simultaneously, the resistance R10 that the other end is then connected with the collector electrode of triode VT1, positive pole is connected with the emitter of triode VT1, the electric capacity C8 that negative pole is then connected with voltage stabilizing circuit, positive pole is connected with the source electrode of field effect transistor Q, the electric capacity C7 that negative pole is connected with the negative pole of electric capacity C8, one end is connected with the base stage of triode VT1, the resistance R6 of other end ground connection after resistance R8, positive pole is connected with the tie point of resistance R8 with resistance R6, the electric capacity C6 of negative pole ground connection after resistance R9, positive pole is connected with drive circuit, the electric capacity C5 that negative pole is then connected with the grid of field effect transistor Q, and one end is connected with the negative pole of electric capacity C5, the resistance R7 that the other end is then connected with the positive pole of electric capacity C6 forms, the drain electrode of described field effect transistor Q is connected with the base stage of triode VT1, and source electrode is connected with the negative pole of electric capacity C6.This boostrap circuit serves the effect of voltage follower in systems in which, makes drive system have very large input impedance, thus improve the load capacity of drive system by its effect.
The voltage of coming in from civil power input is alternating voltage, therefore, is provided with current rectifying and wave filtering circuit in system, thus civil power is become smooth-going direct current.Described current rectifying and wave filtering circuit is by fuse FU, and resistance R1, diode bridge rectifier U, electric capacity C1 form; Fuse FU is serially connected on an input of diode bridge rectifier U, resistance R1 is then serially connected on another input of diode bridge rectifier U, the positive and negative electrode of electric capacity C1 is then serially connected between two outputs of diode bridge rectifier U, the input of fuse is connected with the negative pole of electric capacity C108, and the input of resistance R1 is connected with the N pole of voltage stabilizing didoe D107.
Drive circuit plays the driving effect of whole system, it is by driving chip U1, diode D1, one end is connected with the K2 pin of driving chip U1, the electric capacity C2 that the other end is connected with the negative pole of electric capacity C1, one end is connected with the KS2 pin of driving chip U1, the resistance R3 that the other end is then connected with the negative pole of electric capacity C1, one end is connected with the KS1 pin of driving chip U1, the resistance R5 that the other end is then connected with the negative pole of electric capacity C1, one end is connected with the GND pin of driving chip U1, the electric capacity R2 of other end ground connection, one end is connected with the N pole of diode D1, the resistance R4 that the other end is connected with the CLK pin of driving chip U1 after electric capacity C3, and form with the electric capacity C4 that resistance R4 is in parallel, the N pole of described diode D1 is simultaneously with the positive pole of electric capacity C1 and resistance R10 is connected, its P pole is then connected with GR2 pin with the GR1 pin of driving chip U1 simultaneously, the DIO pin of driving chip U1 is connected with its K2 pin, STB pin is then connected with the positive pole of electric capacity C5, and the model of this driving chip U1 is preferably TM1620B.
Voltage stabilizing circuit can make the voltage of output more stable, and it comprises three terminal regulator U2, electric capacity C9, and electric capacity C10; The positive pole of electric capacity C9 is connected with the GND pin of three terminal regulator U2, minus earth, the positive pole of electric capacity C10 is connected with the OUT pin of three terminal regulator U2, negative pole is connected with the negative pole of electric capacity C8, and the IN pin of described three terminal regulator U2 is connected with the positive pole of electric capacity C4.
As mentioned above, just the present invention can well be realized.
Claims (5)
1. based on the symmetrical expression voltage stabilizing vibration LED drive system that bootstrapping controls, mainly comprise current rectifying and wave filtering circuit, the drive circuit be connected with rectification filter circuit output end, voltage stabilizing circuit, it is characterized in that: between drive circuit and voltage stabilizing circuit, be also provided with boostrap circuit, current rectifying and wave filtering circuit is also provided with symmetrical expression steady voltage periodic circuit (10), described symmetrical expression steady voltage periodic circuit (10) is by triode VT101, triode VT102, triode VT103, triode VT104, triode VT105, triode VT106, triode VT107, triode VT108, N pole is connected with the collector electrode of triode VT102, the diode D102 that P pole is connected with the collector electrode of triode VT102 after inductance L 102, negative pole is connected with the P pole of diode D102, the electric capacity C102 that positive pole is connected with the N pole of diode D102 after diode D101, positive pole is connected with the N pole of diode D102, the electric capacity C101 that negative pole is connected with the positive pole of electric capacity C102, positive pole is connected with the P pole of diode D102 after inductance L 101, the electric capacity C103 that negative pole is connected with the collector electrode of triode VT102, negative pole is connected with the base stage of triode VT102, the electric capacity C104 that positive pole is connected with the collector electrode of triode VT101 after resistance R101, the resistance R102 in parallel with electric capacity C104, one end is connected with the emitter of triode VT102, the resistance R104 of other end ground connection, the electric capacity C105 in parallel with resistance R104, N pole is connected with the negative pole of electric capacity C101, the diode D103 that P pole is connected with the base stage of triode VT103 after diode D104, one end is connected with the base stage of triode VT101, the resistance R103 that the other end is connected with the base stage of triode VT103 after resistance R105, be serially connected in the electric capacity C106 between the base stage of triode VT103 and collector electrode, one end is connected with the N pole of diode D103, the resistance R107 that the other end is connected with the emitter of triode VT103, N pole is connected with the emitter of triode VT103, the diode D105 that P pole is connected with the N pole of diode D103 after resistance R108, one end is connected with the N pole of diode D105, the resistance R109 that the other end is connected with the collector electrode of triode VT103, P pole is connected with the collector electrode of triode VT103, the voltage stabilizing didoe D107 that N pole is connected with the collector electrode of triode VT3 after electric capacity C107, N pole is connected with the P pole of voltage stabilizing didoe D107, the diode D106 that P pole is connected with the N pole of voltage stabilizing didoe D107 after resistance R106, the electric capacity C110 in parallel with voltage stabilizing didoe D107, one end is connected with the base stage of triode VT108, the resistance R114 that the other end is connected with the N pole of voltage stabilizing didoe D107, positive pole is connected with the base stage of triode VT104, the electric capacity C108 that negative pole is connected with the base stage of triode VT105, one end is connected with the emitter of triode VT105, the resistance R110 that the other end is connected with the positive pole of electric capacity C108, one end is connected with the emitter of triode VT104, the resistance R111 that the other end is connected with the negative pole of electric capacity C108, be serially connected in the resistance R112 between the collector electrode of triode VT104 and the collector electrode of triode VT105, the electric capacity C109 in parallel with resistance R112, one end is connected with the positive pole of electric capacity C108, the resistance R112 that the other end is connected with the collector electrode of triode VT106, and one end is connected with the negative pole of electric capacity C108, the resistance R113 that the other end is connected with the collector electrode of triode VT107 forms, wherein, the positive pole of electric capacity C103 is connected with the emitter of triode VT101, the collector electrode of triode VT102 is also connected with the base stage of triode VT103, the collector electrode of triode VT103 also with the base stage of triode VT106, the base stage of triode VT107 and the collector electrode of triode VT108 are connected, the N pole of voltage stabilizing didoe D107 is also connected with the tie point of resistance R105 with resistance R103, the positive pole of electric capacity C108 is connected with the P pole of diode D105, the collector electrode of triode VT104 is connected with the emitter of triode VT106, the collector electrode of triode VT105 is connected with the emitter of triode VT107, the emitter of triode VT108 is connected with the negative pole of electric capacity C108, the positive pole of electric capacity C102 and the N pole of voltage stabilizing didoe D107 form input, the negative pole of electric capacity C108 and the N pole of voltage stabilizing didoe D107 form output.
2. the symmetrical expression voltage stabilizing vibration LED drive system controlled based on bootstrapping according to claim 1, it is characterized in that: described boostrap circuit is by triode VT1, field effect transistor Q, one end is connected with voltage stabilizing circuit with drive circuit simultaneously, the resistance R10 that the other end is then connected with the collector electrode of triode VT1, positive pole is connected with the emitter of triode VT1, the electric capacity C8 that negative pole is then connected with voltage stabilizing circuit, positive pole is connected with the source electrode of field effect transistor Q, the electric capacity C7 that negative pole is connected with the negative pole of electric capacity C8, one end is connected with the base stage of triode VT1, the resistance R6 of other end ground connection after resistance R8, positive pole is connected with the tie point of resistance R8 with resistance R6, the electric capacity C6 of negative pole ground connection after resistance R9, positive pole is connected with drive circuit, the electric capacity C5 that negative pole is then connected with the grid of field effect transistor Q, and one end is connected with the negative pole of electric capacity C5, the resistance R7 that the other end is then connected with the positive pole of electric capacity C6 forms, the drain electrode of described field effect transistor Q is connected with the base stage of triode VT1, and source electrode is connected with the negative pole of electric capacity C6.
3. the symmetrical expression voltage stabilizing vibration LED drive system controlled based on bootstrapping according to claim 2, is characterized in that: described current rectifying and wave filtering circuit is by fuse FU, and resistance R1, diode bridge rectifier U, electric capacity C1 form; Fuse FU is serially connected on an input of diode bridge rectifier U, resistance R1 is then serially connected on another input of diode bridge rectifier U, the positive and negative electrode of electric capacity C1 is then serially connected between two outputs of diode bridge rectifier U, the input of fuse is connected with the negative pole of electric capacity C108, and the input of resistance R1 is connected with the N pole of voltage stabilizing didoe D107.
4. the symmetrical expression voltage stabilizing vibration LED drive system controlled based on bootstrapping according to claim 3, it is characterized in that: described drive circuit is by driving chip U1, diode D1, one end is connected with the K2 pin of driving chip U1, the electric capacity C2 that the other end is connected with the negative pole of electric capacity C1, one end is connected with the KS2 pin of driving chip U1, the resistance R3 that the other end is then connected with the negative pole of electric capacity C1, one end is connected with the KS1 pin of driving chip U1, the resistance R5 that the other end is then connected with the negative pole of electric capacity C1, one end is connected with the GND pin of driving chip U1, the electric capacity R2 of other end ground connection, one end is connected with the N pole of diode D1, the resistance R4 that the other end is connected with the CLK pin of driving chip U1 after electric capacity C3, and form with the electric capacity C4 that resistance R4 is in parallel, the N pole of described diode D1 is simultaneously with the positive pole of electric capacity C1 and resistance R10 is connected, its P pole is then connected with GR2 pin with the GR1 pin of driving chip U1 simultaneously, the DIO pin of driving chip U1 is connected with its K2 pin, and STB pin is then connected with the positive pole of electric capacity C5.
5. the symmetrical expression voltage stabilizing vibration LED drive system controlled based on bootstrapping according to claim 4, is characterized in that: described voltage stabilizing circuit comprises three terminal regulator U2, electric capacity C9, and electric capacity C10; The positive pole of electric capacity C9 is connected with the GND pin of three terminal regulator U2, minus earth, the positive pole of electric capacity C10 is connected with the OUT pin of three terminal regulator U2, negative pole is connected with the negative pole of electric capacity C8, and the IN pin of described three terminal regulator U2 is connected with the positive pole of electric capacity C4.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510309388.8A CN104869724A (en) | 2014-11-18 | 2015-06-08 | Symmetrical voltage-stabilizing oscillation LED drive system based on bootstrapping control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410663882X | 2014-11-18 | ||
| CN201410663882.XA CN104411043A (en) | 2014-11-18 | 2014-11-18 | LED driving system based on bootstrap control |
| CN201510309388.8A CN104869724A (en) | 2014-11-18 | 2015-06-08 | Symmetrical voltage-stabilizing oscillation LED drive system based on bootstrapping control |
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| CN104869724A true CN104869724A (en) | 2015-08-26 |
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| CN201410663882.XA Pending CN104411043A (en) | 2014-11-18 | 2014-11-18 | LED driving system based on bootstrap control |
| CN201510309388.8A Pending CN104869724A (en) | 2014-11-18 | 2015-06-08 | Symmetrical voltage-stabilizing oscillation LED drive system based on bootstrapping control |
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| CN201410663882.XA Pending CN104411043A (en) | 2014-11-18 | 2014-11-18 | LED driving system based on bootstrap control |
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Application publication date: 20150826 |