CN104486871A - Bootstrap control LED (light-emitting diode) drive system based on phase shifting treatment - Google Patents
Bootstrap control LED (light-emitting diode) drive system based on phase shifting treatment Download PDFInfo
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- CN104486871A CN104486871A CN201410692717.7A CN201410692717A CN104486871A CN 104486871 A CN104486871 A CN 104486871A CN 201410692717 A CN201410692717 A CN 201410692717A CN 104486871 A CN104486871 A CN 104486871A
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Abstract
The invention discloses a bootstrap control LED (light-emitting diode) drive system based on phase shifting treatment. The bootstrap control LED drive system is characterized by comprising a rectifier and filter circuit, a drive circuit, a bootstrap circuit and a phase shifting treatment circuit, wherein the drive circuit is connected with an output end of the rectifier and filter circuit; the bootstrap circuit is connected with the drive circuit; the phase shifting treatment circuit is connected with the bootstrap circuit, and is composed of a phase shifting chip U2, a triode VT2, a triode VT3, a resistor R12, a polar capacitor C9, a polar capacitor C11 and the like; one end of the resistor R12 is connected with a VCC+ pin of the phase shifting chip U2; the other end of the resistor R12 is connected with an IN1 pin of the phase shifting chip U2; a cathode of the polar capacitor C9 passes through a resistor R11 and then is connected with the IN1 pin of the phase shifting chip U2; an anode of the polar capacitor C9 is connected with the IN2 pin of the phase shifting chip U2; an anode of the capacitor C11 passes through a resistor R13 and then is connected with an NC pin of the phase shifting chip U2; a cathode of the capacitor C11 is connected with a collector of the triode VT2. According to the bootstrap control LED drive system, by adopting the phase shifting treatment circuit, good stability can be ensured when high power is output by the LED drive system.
Description
Technical field
The present invention relates to a kind of drive system, specifically refer to that a kind of bootstrapping based on phase shift process controls LED drive system.
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, provide a kind of bootstrapping based on phase shift process that can promote load capacity to control LED drive system.
Object of the present invention is achieved through the following technical solutions: the bootstrapping based on phase shift process controls LED drive system, comprise current rectifying and wave filtering circuit, the drive circuit be connected with rectification filter circuit output end, the boostrap circuit be connected with drive circuit, the phase shift treatment circuit be connected with boostrap circuit, described phase shift treatment circuit is by phase shift chip U2, triode VT2, triode VT3, one end is connected with the VCC+ pin of phase shift chip U2, the resistance R12 that the other end is connected with the IN1 pin of phase shift chip U2, negative pole is connected with the IN1 pin of phase shift chip U2 after resistance R11, the polar capacitor C9 that positive pole is connected with the IN2 pin of phase shift chip U2, positive pole is connected with the NC pin of phase shift chip U2 after resistance R13, the polar capacitor C11 that negative pole is connected with the collector electrode of triode VT2, positive pole is connected with the OUT pin of phase shift chip U2, the polar capacitor C10 of minus earth, one end is connected with the OUT pin of phase shift chip U2, the potentiometer R14 that the other end is connected with the collector electrode of triode VT3, P pole is connected with the OFF1 pin of phase shift chip U2, the diode D3 that N pole is connected with the base stage of triode VT2, and P pole is connected with the OFF2 pin of phase shift chip U2, the diode D2 that N pole is connected with the emitter of triode VT3 forms, the IN1 pin of described phase shift chip U2 is connected with boostrap circuit, VCC-pin ground connection, OUT pin are connected with the sliding end of potentiometer R14, the emitter of triode VT2 is connected with the base stage of triode VT3, the collector and emitter of triode VT3 is then as the output of system, and the negative pole of electric capacity C9 is connected with boostrap circuit.
Described current rectifying and wave filtering circuit is by fuse FU, and resistance R1, diode bridge rectifier U, polar capacitor 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 polar capacitor C1 is then serially connected between two outputs of diode bridge rectifier U, and positive and negative the two poles of the earth of electric capacity C1 are also connected with drive circuit.
Described drive circuit is by driving chip U1, diode D1, one end is connected with the LN pin of driving chip U1, the polar capacitor C2 that the other end is connected with the negative pole of polar capacitor C1, one end is connected with the CS2 pin of driving chip U1, the resistance R3 that the other end is then connected with the negative pole of polar capacitor C1, one end is connected with the CS1 pin of driving chip U1, the resistance R5 that the other end is then connected with the negative pole of polar capacitor C1, one end is connected with the GND pin of driving chip U1, the resistance 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 SOU pin of driving chip U1 after polar capacitor C3, and form with the polar capacitor C4 that resistance R4 is in parallel, the N pole of described diode D1 is simultaneously with the positive pole of polar capacitor C1 and boostrap circuit is connected, its P pole is then connected with DRA2 pin with the DRA1 pin of driving chip U1 simultaneously, the V33 pin of driving chip U1 is connected with its LN pin, and SW pin is then connected with boostrap circuit.
Described boostrap circuit is by triode VT1, field effect transistor Q, one end is connected with the N pole of diode D1 and the IN1 pin of phase shift chip U2 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 polar capacitor C8 that negative pole is then connected with the negative pole of electric capacity C9, positive pole is connected with the source electrode of field effect transistor Q, the polar capacitor C7 that negative pole is connected with the negative pole of polar capacitor 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 polar capacitor C6 of negative pole ground connection after resistance R9, positive pole is connected with the SW pin of driving chip U1, the polar capacitor 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 polar capacitor C5, the other end be then connected with the positive pole of polar capacitor C6 resistance R7 form, 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 polar capacitor C6.
Described phase shift chip U2 is LM741 integrated chip.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention adopts phase shift treatment circuit, and it can also ensure good stability LED drive system exports powerful while.
(2) the present invention adopts LM741 integrated chip, and stability is high, low price.
(3) the present invention 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.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
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, bootstrapping based on phase shift process of the present invention controls LED drive system, comprises current rectifying and wave filtering circuit, the drive circuit be connected with rectification filter circuit output end, the boostrap circuit be connected with drive circuit, the phase shift treatment circuit be connected with boostrap circuit.
Described phase shift treatment circuit is by phase shift chip U2, triode VT2, triode VT3, one end is connected with the VCC+ pin of phase shift chip U2, the resistance R12 that the other end is connected with the IN1 pin of phase shift chip U2, negative pole is connected with the IN1 pin of phase shift chip U2 after resistance R11, the polar capacitor C9 that positive pole is connected with the IN2 pin of phase shift chip U2, positive pole is connected with the NC pin of phase shift chip U2 after resistance R13, the polar capacitor C11 that negative pole is connected with the collector electrode of triode VT2, positive pole is connected with the OUT pin of phase shift chip U2, the polar capacitor C10 of minus earth, one end is connected with the OUT pin of phase shift chip U2, the potentiometer R14 that the other end is connected with the collector electrode of triode VT3, P pole is connected with the OFF1 pin of phase shift chip U2, the diode D3 that N pole is connected with the base stage of triode VT2, and P pole is connected with the OFF2 pin of phase shift chip U2, the diode D2 that N pole is connected with the emitter of triode VT3 forms, the IN1 pin of described phase shift chip U2 is connected with boostrap circuit, VCC-pin ground connection, OUT pin are connected with the sliding end of potentiometer R14, the emitter of triode VT2 is connected with the base stage of triode VT3, the collector and emitter of triode VT3 is then as the output of system, and the negative pole of electric capacity C9 is connected with boostrap circuit.Phase shift treatment circuit, can also ensure good stability LED drive system exports powerful while.In order to ensure that the phase shift chip U2 described in implementation result is set to LM741 integrated chip.
Described current rectifying and wave filtering circuit is by fuse FU, and resistance R1, diode bridge rectifier U, polar capacitor 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 polar capacitor C1 is then serially connected between two outputs of diode bridge rectifier U, and positive and negative the two poles of the earth of electric capacity C1 are also connected with drive circuit.
Described drive circuit provides driving effect for system, it is by driving chip U1, diode D1, one end is connected with the LN pin of driving chip U1, the polar capacitor C2 that the other end is connected with the negative pole of polar capacitor C1, one end is connected with the CS2 pin of driving chip U1, the resistance R3 that the other end is then connected with the negative pole of polar capacitor C1, one end is connected with the CS1 pin of driving chip U1, the resistance R5 that the other end is then connected with the negative pole of polar capacitor C1, one end is connected with the GND pin of driving chip U1, the resistance 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 SOU pin of driving chip U1 after polar capacitor C3, and form with the polar capacitor C4 that resistance R4 is in parallel, the N pole of described diode D1 is simultaneously with the positive pole of polar capacitor C1 and boostrap circuit is connected, its P pole is then connected with DRA2 pin with the DRA1 pin of driving chip U1 simultaneously, the V33 pin of driving chip U1 is connected with its LN pin, and SW pin is then connected with boostrap circuit.
Described boostrap circuit can improve the load capacity of LED drive system, it is by triode VT1, field effect transistor Q, one end is connected with the N pole of diode D1 and the IN1 pin of phase shift chip U2 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 polar capacitor C8 that negative pole is then connected with the negative pole of electric capacity C9, positive pole is connected with the source electrode of field effect transistor Q, the polar capacitor C7 that negative pole is connected with the negative pole of polar capacitor 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 polar capacitor C6 of negative pole ground connection after resistance R9, positive pole is connected with the SW pin of driving chip U1, the polar capacitor 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 polar capacitor C5, the other end be then connected with the positive pole of polar capacitor C6 resistance R7 form, 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 polar capacitor C6.
As mentioned above, just the present invention can well be realized.
Claims (5)
1. the bootstrapping based on phase shift process controls LED drive system, it is characterized in that: comprise current rectifying and wave filtering circuit, the drive circuit be connected with rectification filter circuit output end, the boostrap circuit be connected with drive circuit, the phase shift treatment circuit be connected with boostrap circuit, described phase shift treatment circuit is by phase shift chip U2, triode VT2, triode VT3, one end is connected with the VCC+ pin of phase shift chip U2, the resistance R12 that the other end is connected with the IN1 pin of phase shift chip U2, negative pole is connected with the IN1 pin of phase shift chip U2 after resistance R11, the polar capacitor C9 that positive pole is connected with the IN2 pin of phase shift chip U2, positive pole is connected with the NC pin of phase shift chip U2 after resistance R13, the polar capacitor C11 that negative pole is connected with the collector electrode of triode VT2, positive pole is connected with the OUT pin of phase shift chip U2, the polar capacitor C10 of minus earth, one end is connected with the OUT pin of phase shift chip U2, the potentiometer R14 that the other end is connected with the collector electrode of triode VT3, P pole is connected with the OFF1 pin of phase shift chip U2, the diode D3 that N pole is connected with the base stage of triode VT2, and P pole is connected with the OFF2 pin of phase shift chip U2, the diode D2 that N pole is connected with the emitter of triode VT3 forms, the IN1 pin of described phase shift chip U2 is connected with boostrap circuit, VCC-pin ground connection, OUT pin are connected with the sliding end of potentiometer R14, the emitter of triode VT2 is connected with the base stage of triode VT3, the collector and emitter of triode VT3 is then as the output of system, and the negative pole of electric capacity C9 is connected with boostrap circuit.
2. the bootstrapping based on phase shift process according to claim 1 controls LED drive system, it is characterized in that: described current rectifying and wave filtering circuit is by fuse FU, and resistance R1, diode bridge rectifier U, polar capacitor 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 polar capacitor C1 is then serially connected between two outputs of diode bridge rectifier U, and positive and negative the two poles of the earth of electric capacity C1 are also connected with drive circuit.
3. the bootstrapping based on phase shift process according to claim 2 controls LED drive system, it is characterized in that: described drive circuit is by driving chip U1, diode D1, one end is connected with the LN pin of driving chip U1, the polar capacitor C2 that the other end is connected with the negative pole of polar capacitor C1, one end is connected with the CS2 pin of driving chip U1, the resistance R3 that the other end is then connected with the negative pole of polar capacitor C1, one end is connected with the CS1 pin of driving chip U1, the resistance R5 that the other end is then connected with the negative pole of polar capacitor C1, one end is connected with the GND pin of driving chip U1, the resistance 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 SOU pin of driving chip U1 after polar capacitor C3, and form with the polar capacitor C4 that resistance R4 is in parallel, the N pole of described diode D1 is simultaneously with the positive pole of polar capacitor C1 and boostrap circuit is connected, its P pole is then connected with DRA2 pin with the DRA1 pin of driving chip U1 simultaneously, the V33 pin of driving chip U1 is connected with its LN pin, and SW pin is then connected with boostrap circuit.
4. the bootstrapping based on phase shift process according to claim 3 controls LED drive system, it is characterized in that: described boostrap circuit is by triode VT1, field effect transistor Q, one end is connected with the N pole of diode D1 and the IN1 pin of phase shift chip U2 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 polar capacitor C8 that negative pole is then connected with the negative pole of electric capacity C9, positive pole is connected with the source electrode of field effect transistor Q, the polar capacitor C7 that negative pole is connected with the negative pole of polar capacitor 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 polar capacitor C6 of negative pole ground connection after resistance R9, positive pole is connected with the SW pin of driving chip U1, the polar capacitor 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 polar capacitor C5, the other end be then connected with the positive pole of polar capacitor C6 resistance R7 form, 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 polar capacitor C6.
5. the bootstrapping based on phase shift process according to any one of Claims 1 to 4 controls LED drive system, it is characterized in that: described phase shift chip U2 is LM741 integrated chip.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410692717.7A CN104486871A (en) | 2014-11-26 | 2014-11-26 | Bootstrap control LED (light-emitting diode) drive system based on phase shifting treatment |
| CN201510307152.0A CN104853507A (en) | 2014-11-26 | 2015-06-06 | Bootstrap control LED driving system based on capacitance feedback three-point type oscillation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410692717.7A CN104486871A (en) | 2014-11-26 | 2014-11-26 | Bootstrap control LED (light-emitting diode) drive system based on phase shifting treatment |
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| CN104486871A true CN104486871A (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410692717.7A Pending CN104486871A (en) | 2014-11-26 | 2014-11-26 | Bootstrap control LED (light-emitting diode) drive system based on phase shifting treatment |
| CN201510307152.0A Pending CN104853507A (en) | 2014-11-26 | 2015-06-06 | Bootstrap control LED driving system based on capacitance feedback three-point type oscillation circuit |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510307152.0A Pending CN104853507A (en) | 2014-11-26 | 2015-06-06 | Bootstrap control LED driving system based on capacitance feedback three-point type oscillation circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5031865B2 (en) * | 2010-03-23 | 2012-09-26 | シャープ株式会社 | LED drive circuit, LED illumination lamp, LED illumination device, and LED illumination system |
| CN201986233U (en) * | 2011-03-22 | 2011-09-21 | 福建农林大学 | Phase-controlled constant-current and high-power LED (light-emitting diode) driving circuit |
| CN103379701B (en) * | 2012-04-26 | 2015-12-16 | 海洋王（东莞）照明科技有限公司 | A kind of LED drive circuit and LED lamp |
| CN202857066U (en) * | 2012-09-27 | 2013-04-03 | 杭州鸿德照明科技有限公司 | Novel high-power LED isolation constant-current driving circuit composed by discrete components |
| CN203206508U (en) * | 2013-03-25 | 2013-09-18 | 福建省卓珏光电科技有限公司 | Novel LED lamp driving circuit |
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- 2014-11-26 CN CN201410692717.7A patent/CN104486871A/en active Pending
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| CN104853507A (en) | 2015-08-19 |
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Application publication date: 20150401 |