CN105813278A - Surge current limiting type high-impedance constant-current luminescent LED (light emitting diode) power circuit - Google Patents
Surge current limiting type high-impedance constant-current luminescent LED (light emitting diode) power circuit Download PDFInfo
- Publication number
- CN105813278A CN105813278A CN201610379769.8A CN201610379769A CN105813278A CN 105813278 A CN105813278 A CN 105813278A CN 201610379769 A CN201610379769 A CN 201610379769A CN 105813278 A CN105813278 A CN 105813278A
- Authority
- CN
- China
- Prior art keywords
- audion
- pole
- resistance
- diode
- polar capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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]
Landscapes
- Amplifiers (AREA)
Abstract
The invention discloses a surge current limiting type high-impedance constant-current luminescent LED (light emitting diode) power circuit.The power circuit is characterized by mainly comprising a control chip U2, a reference current correcting circuit, a low-pass filter circuit, a thyristor trigger circuit, a transformer T, a diode rectifier U1, a polar capacitor C1, a polar capacitor C5, a resistor R9, a constant-current drive circuit, a high-impedance amplifying circuit and a surge current limiting circuit, wherein the high-impedance amplifying circuit is serially connected between the reference current correcting circuit and the thyristor trigger circuit, and the surge current limiting circuit is serially connected between the low-pass filter circuit and the reference current correcting circuit.The surge current limiting type high-impedance constant-current luminescent LED power circuit has the advantages that filtering of voltage and current of an input end can be realized to make input voltage and current more stable, intensity of the filtered voltage and current can be adjusted to keep movement of electromagnetic waves of the current in a constant-speed state, and accordingly stable working current output can be realized, and LED brightness stability is guaranteed.
Description
Technical field
The present invention relates to electric energy-saving field, specifically, be the high impedance constant current mode cold light LED power circuit of a kind of surge current restriction.
Background technology
At present, due to LED have that energy consumption is low, the feature such as long service life and safety and environmental protection, one of its main product having had become as people's life lighting.Owing to LED is different from traditional electric filament lamp, therefore its needs are driven by special power circuit.But, the power circuit that current LED uses not only is easily subject to the impact of external voltage fluctuations, and its load capacity is poor, and output electric current is unstable, thus causing that the brightness instability of LED, power consumption, service life are short.
Therefore it provides one can improve load capacity, can ensure that again outputting current steadily, the LED power circuit that simultaneously can also reduce energy consumption is the task of top priority.
Summary of the invention
It is an object of the invention to overcome LED voltage circuit of the prior art to there is load capacity poor, the defect that output electric current is unstable, it is provided that the high impedance constant current mode cold light LED power circuit of a kind of surge current restriction.
nullThe present invention is achieved through the following technical solutions: the high impedance constant current mode cold light LED power circuit of a kind of surge current restriction，Main by control chip U2，Transformator T，Diode rectifier U1，The constant-current drive circuit being connected with Same Name of Ends with the non-same polarity of transformator T secondary inductance coil respectively，Negative pole is connected with the cathode output end of diode rectifier U1、The polar capacitor C1 that positive pole is connected with the cathode output end of diode rectifier U1，Negative pole is connected with the CS pin of control chip U2、The polar capacitor C5 that positive pole is connected with the RE pin of control chip U2 after inductance L1，One end is connected with the positive pole of polar capacitor C5、The other end be connected with the GND pin of control chip U2 after the resistance R9 of ground connection，It is serially connected in the reference current correcting circuit between the VCC pin of control chip U2 and VS-pin，With the control chip U2 thyristor gating circuit being connected，It is serially connected in the low-pass filter circuit between diode rectifier U1 and transformator T，It is serially connected in the ICLC between low-pass filter circuit and reference current correcting circuit，And it is serially connected in the high impedance amplifying circuit composition between reference current correcting circuit and thyristor gating circuit；Described reference current correcting circuit is connected with thyristor gating circuit.
nullDescribed ICLC is by audion VT7，Audion VT8，Audion VT9，Audion VT10，N pole is sequentially connected with the base stage of audion VT9 after resistance R44 through resistance R43、P pole is as the input of ICLC the diode D12 that is connected with low-pass filter circuit，One end is connected with the base stage of audion VT9、The adjustable resistance R45 that the other end is connected with the colelctor electrode of audion VT9，Positive pole P pole with diode D12 after critesistor RL is connected、Negative pole is sequentially through the resistance R39 polar capacitor C16 being connected with the emitter stage of audion VT8 after resistance R40，Negative pole is connected with the base stage of audion VT7、Positive pole is sequentially through the resistance R38 polar capacitor C17 being connected with the N pole of diode D12 after resistance R37，One end is connected with the positive pole of polar capacitor C17、The adjustable resistance R41 that the other end is connected with the base stage of audion VT7，Positive pole is connected with the emitter stage of audion VT8 after resistance R46、The polar capacitor C18 of minus earth，N pole is connected with the emitter stage of audion VT10、The diode D14 that P pole is connected with the negative pole of polar capacitor C18，One end is connected with the P pole of diode D14、The inductance L4 that the other end is connected with the emitter stage of audion VT10，And P pole is connected with the base stage of audion VT7 after resistance R42、The Zener diode D13 composition that N pole is connected with the emitter stage of audion VT10；The minus earth of described polar capacitor C16；The emitter stage of described audion VT7 is connected with the base stage of mythical animals Buddha's warrior attendant 4, and the colelctor electrode of its audion VT7 is connected with the colelctor electrode of audion VT8 and is all connected with the base stage of audion VT9；The colelctor electrode of described audion VT9 is connected with the colelctor electrode of audion VT10, and the base stage of its audion VT9 is connected with the base stage of audion VT10；The emitter stage of described audion VT10 as outfan and be connected with reference current correcting circuit.
nullDescribed high impedance amplifying circuit is by field effect transistor MOS3，Audion VT5，Audion VT6，One end is connected with the grid of field effect transistor MOS3、The other end is as the input of high impedance amplifying circuit the inductance L3 that is connected with reference current correcting circuit，Positive pole is connected with the grid of field effect transistor MOS3、The polar capacitor C13 of minus earth，P pole is connected with the negative pole of polar capacitor C13 after resistance R25、N pole is sequentially through the resistance R31 diode D10 being connected with the base stage of audion VT6 after resistance R32，One end is connected with the source electrode of field effect transistor MOS3、The resistance R27 that the other end is connected with the emitter stage of audion VT5，Negative pole is connected with the colelctor electrode of audion VT5 after resistance R28、The polar capacitor C15 that positive pole is connected with the base stage of audion VT6 after resistance R29，One end is connected with the base stage of audion VT5、The adjustable resistance R30 that the other end is connected with the base stage of audion VT6，One end is connected with the emitter stage of audion VT6、The resistance R35 of other end ground connection，Negative pole is connected with the grid of field effect transistor MOS3、Positive pole is sequentially through the resistance R23 polar capacitor C12 being connected with the drain electrode of field effect transistor MOS3 after resistance R24，P pole is connected with the junction point of resistance R23 with resistance R24、The diode D9 that N pole is connected with the drain electrode of field effect transistor MOS3 after resistance R26，Negative pole N pole with diode D9 after resistance R33 is connected、The polar capacitor C14 that positive pole is connected with audion VT6 base stage after resistance R34，And P pole is connected with the positive pole of polar capacitor C14、The diode D11 composition that N pole is connected with the colelctor electrode of audion VT6 after resistance R36；The minus earth of described polar capacitor C15；The P pole of described diode D11 is as the outfan of high impedance amplifying circuit and is connected with thyristor gating circuit.
nullDescribed constant-current drive circuit is by audion VT3，Audion VT4，Positive pole is connected with the base stage of audion VT3 after resistance R16、The polar capacitor C9 that negative pole is connected with the colelctor electrode of audion VT3，N pole is connected with the positive pole of polar capacitor C9 after resistance R18、The diode D7 that P pole is connected with the emitter stage of audion VT3 after resistance R20，One end is connected with the N pole of diode D7、The inductance L2 that the other end is connected with the emitter stage of audion VT4，Positive pole is connected with the base stage of audion VT4 after resistance R21、The polar capacitor C10 that negative pole is connected with the emitter stage of audion VT3，N pole is connected with the colelctor electrode of audion VT4、The emitter stage of P pole and audion VT4 is collectively forming the Zener diode D8 of the outfan of constant-current drive circuit，Negative pole P pole with Zener diode D8 after resistance R22 is connected、The polar capacitor C11 that positive pole is connected with the emitter stage of audion VT3，One end is connected with the emitter stage of audion VT3、The resistance R19 that the other end is connected with the negative pole of polar capacitor C10，And P pole is connected with the base stage of audion VT3、The diode D6 composition that N pole is connected with the positive pole of polar capacitor C11 after resistance R17；The positive pole of described polar capacitor C9 is connected with the non-same polarity of transformator T secondary inductance coil；The N pole of described diode D6 is connected with the Same Name of Ends of transformator T secondary inductance coil.
Described low-pass filter circuit is by audion VT1, P pole is connected with the cathode output end of diode rectifier U1, the diode D1 that N pole is connected with the base stage of audion VT1 after adjustable resistance R2, positive pole is connected with the P pole of diode D1, the polar capacitor C2 that negative pole is connected with the base stage of audion VT1, P pole is connected with the positive pole of polar capacitor C2, N pole be connected with the colelctor electrode of audion VT1 after the diode D3 of ground connection, one end is connected with the N pole of diode D1, the resistance R3 that the other end is connected with the emitter stage of audion VT1, and positive pole N pole with diode D1 after resistance R4 is connected, the polar capacitor C3 composition that negative pole is connected with the colelctor electrode of audion VT1 after resistance R5；The base stage of described audion VT1 is connected with the P pole of diode D12, and its colelctor electrode is connected with thyristor gating circuit.
Described reference current correcting circuit is by audion VT2, N pole VCC pin with control chip U after resistance R7 is connected, the diode D2 that P pole is connected with the emitter stage of audion VT2 after resistance R8, positive pole is connected with the colelctor electrode of audion VT2, the polar capacitor C4 of minus earth, P pole is connected with the base stage of audion VT2 after resistance R10, the diode D4 that N pole is connected with the VS pin of control chip U2, and positive pole is sequentially connected with the negative pole of polar capacitor C4 after resistance R11 through resistance R12, the polar capacitor C6 composition that negative pole is connected with the grid of field effect transistor MOS3 after inductance L3；The N pole of described diode D4 is connected with the positive pole of polar capacitor C6；The N pole of described diode D2 is connected with the emitter stage of audion VT10.
nullDescribed thyristor gating circuit is by field effect transistor MOS1，Field effect transistor MOS2，One end is connected with the LO pin of control chip U2、The resistance R13 that the other end is connected with the grid of field effect transistor MOS2，Negative pole grid with field effect transistor MOS2 after resistance R15 is connected、The polar capacitor C8 that positive pole is connected with the emitter stage of audion VT1，Negative pole is connected with the grid of field effect transistor MOS1、The polar capacitor C7 that positive pole is connected with the HC pin of control chip U2 after resistance R6，One end is connected with the source electrode of field effect transistor MOS1、The resistance R14 that the other end is connected with the VS+ pin of control chip U2，And P pole is connected with the source electrode of field effect transistor MOS2、The diode D5 composition that N pole is connected with the non-same polarity of the former limit inductance coil of transformator T；The grounded drain of described field effect transistor MOS2, its grid is connected with the P pole of diode D11, and its source electrode is connected with the source electrode of field effect transistor MOS1；The drain electrode of described field effect transistor MOS1 is connected with the Same Name of Ends of transformator T former limit inductance coil and the emitter stage of audion VT1 respectively.
For the practical effect of the present invention, described control chip U2 then preferentially adopts L6569 integrated chip to realize.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) input terminal voltage electric current can be filtered processing by the present invention, the voltage x current making input is more steady, the intensity of the voltage x current after Filtering Processing of the present invention is adjusted simultaneously, the electromagnetic motion making electric current remains a constant speed state, thus the present invention improves the stability of LED brightness.
(2) surge current in input electric current can be limited by the present invention, effectively prevents input current from instantaneous high current occur, thus effectively raising the stability of the output electric current of the present invention.
(3) present invention has stronger driving force simultaneously, and the driving force of the present invention improves about 60% than the driving force of existing LED power circuit, and namely multiple LED groups can be provided stable driving electric current by the present invention simultaneously.
(4) present invention employs high-precision L6569 integrated chip, this chip has the functions such as stability is strong, overtemperature protection, overcurrent protection, effectively raises the stability of the output electric current of the present invention.
(5) service life that can effectively extend LED of the present invention, the electricity of more than 50% can be saved, thus meeting people LED is controlled system demand in energy-conservation simultaneously.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the constant-current drive circuit of the present invention.
Fig. 3 is the electrical block diagram of the high impedance amplifying circuit of the present invention.
Fig. 4 is the electrical block diagram of the ICLC of the present invention.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by control chip U2, transformator T, diode rectifier U1, polar capacitor C1, polar capacitor C5, inductance L1, ICLC, high impedance amplifying circuit, constant-current drive circuit, thyristor gating circuit, reference current correcting circuit, and low-pass filter circuit composition.
During enforcement, the negative pole of polar capacitor C1 is connected with the cathode output end of diode rectifier U1, its positive pole is connected with the cathode output end of diode rectifier U1.The negative pole of polar capacitor C5 is connected with the CS pin of control chip U2, its positive pole RE pin with control chip U2 after inductance L1 is connected.Ground connection after one end of resistance R9 is connected with the positive pole of polar capacitor C5, the other end is connected with the GND pin of control chip U2.Constant-current drive circuit is connected with Same Name of Ends with the non-same polarity of transformator T secondary inductance coil respectively.ICLC is serially connected between low-pass filter circuit and reference current correcting circuit.Reference current correcting circuit is serially connected between the VCC pin of control chip U2 and VS-pin.Thyristor gating circuit is connected with control chip U2.High impedance amplifying circuit is serially connected between reference current correcting circuit and thyristor gating circuit.Low-pass filter circuit is serially connected between diode rectifier U1 and transformator T.
Described reference current correcting circuit is connected with low-pass filter circuit.The input of described diode rectifier U1 is connected with power supply.
Wherein, described low-pass filter circuit is made up of audion VT1, resistance R1, adjustable resistance R2, resistance R3, resistance R4, resistance R5, polar capacitor C3, diode D1, and diode D3.
During connection, the P pole of diode D1 is connected with the cathode output end of diode rectifier U1, its N pole is connected with the base stage of audion VT1 after adjustable resistance R2.The positive pole of polar capacitor C2 is connected with the P pole of diode D1, its negative pole is connected with the base stage of audion VT1.Ground connection after the P pole of diode D3 is connected with the positive pole of polar capacitor C2, its N pole is connected with the colelctor electrode of audion VT1.
Meanwhile, one end of resistance R3 is connected with the N pole of diode D1, its other end is connected with the emitter stage of audion VT1.The positive pole of polar capacitor C3 N pole with diode D1 after resistance R4 is connected, its negative pole is connected with the colelctor electrode of audion VT1 after resistance R5.The base stage of described audion VT1 is connected with the P pole of diode D12, and its colelctor electrode is connected with thyristor gating circuit.
Further, described reference current correcting circuit is made up of audion VT2, resistance R7, resistance R8, resistance R10, resistance R11, resistance R12, polar capacitor C4, polar capacitor C6, diode D2, and diode D4.
During connection, the N pole of diode D2 VCC pin with control chip U after resistance R7 is connected, its P pole is connected with the emitter stage of audion VT2 after resistance R8.The positive pole of polar capacitor C4 is connected with the colelctor electrode of audion VT2, its minus earth.The P pole of diode D4 is connected with the base stage of audion VT2 after resistance R10, its N pole is connected with the VS pin of control chip U2.The positive pole of polar capacitor C6 is sequentially connected with the negative pole of polar capacitor C4 after resistance R11 through resistance R12, its negative pole grid with field effect transistor MOS3 after inductance L3 is connected.The N pole of described diode D4 is connected with the positive pole of polar capacitor C6；The N pole of described diode D2 is connected with the emitter stage of audion VT10.
Further, described thyristor gating circuit is made up of field effect transistor MOS1, field effect transistor MOS2, resistance R6, resistance R13, resistance R14, resistance R15, polar capacitor C8, and Zener diode D5.
During connection, one end of resistance R13 is connected with the LO pin of control chip U2, its other end is connected with the grid of field effect transistor MOS2.The negative pole of polar capacitor C8 grid with field effect transistor MOS2 after resistance R15 is connected, its positive pole is connected with the emitter stage of audion VT1.The negative pole of polar capacitor C7 is connected with the grid of field effect transistor MOS1, its positive pole HC pin with control chip U2 after resistance R6 is connected.One end of resistance R14 is connected with the source electrode of field effect transistor MOS1, its other end is connected with the VS+ pin of control chip U2.The P pole of diode D5 is connected with the source electrode of field effect transistor MOS2, its N pole is connected with the non-same polarity of the former limit inductance coil of transformator T.
The grounded drain of described field effect transistor MOS2, its grid is connected with the P pole of diode D11, and its source electrode is connected with the source electrode of field effect transistor MOS1；The drain electrode of described field effect transistor MOS1 is connected with the Same Name of Ends of transformator T former limit inductance coil and the emitter stage of audion VT1 respectively.
As in figure 2 it is shown, described constant-current drive circuit is by audion VT3, audion VT4, resistance R16, resistance R17, resistance R18, resistance R19, resistance R10, resistance R21, resistance R22, polar capacitor C9, polar capacitor C10, polar capacitor C11, diode D6, diode D7, Zener diode D8, and inductance L2 composition.
During connection, the positive pole of polar capacitor C9 is connected with the base stage of audion VT3 after resistance R16, its negative pole is connected with the colelctor electrode of audion VT3.The N pole of diode D7 is connected with the positive pole of polar capacitor C9 after resistance R18, its P pole is connected with the emitter stage of audion VT3 after resistance R20.One end of inductance L2 is connected with the N pole of diode D7, its other end is connected with the emitter stage of audion VT4.The positive pole of polar capacitor C10 is connected with the base stage of audion VT4 after resistance R21, its negative pole is connected with the emitter stage of audion VT3.
Wherein, the N pole of Zener diode D8 is connected with the colelctor electrode of audion VT4, its P pole is collectively forming the outfan of constant-current drive circuit and is connected with LED group with the emitter stage of audion VT4.The negative pole of polar capacitor C11 P pole with Zener diode D8 after resistance R22 is connected, its positive pole is connected with the emitter stage of audion VT3.One end of resistance R19 is connected with the emitter stage of audion VT3, its other end is connected with the negative pole of polar capacitor C10.The P pole of diode D6 is connected with the base stage of audion VT3, its N pole is connected with the positive pole of polar capacitor C11 after resistance R17.
The positive pole of described polar capacitor C9 is connected with the non-same polarity of transformator T secondary inductance coil；The N pole of described diode D6 is connected with the Same Name of Ends of transformator T secondary inductance coil.
As it is shown on figure 3, described high impedance amplifying circuit is by field effect transistor MOS3, audion VT5, audion VT6, resistance R23, resistance R24, resistance R25, resistance R26, resistance R27, resistance R28, resistance R29, resistance R30, resistance R31, resistance R32, resistance R33, resistance R34, resistance R35, resistance R36, polar capacitor C12, polar capacitor C13, polar capacitor C14, polar capacitor C15, diode D9, diode D10, diode D11, and inductance L3 form.
During connection, one end of inductance L3 is connected with the grid of field effect transistor MOS3, its other end is as the input of high impedance amplifying circuit and is connected with reference current correcting circuit.The positive pole of polar capacitor C13 is connected with the grid of field effect transistor MOS3, its minus earth.The P pole of diode D10 is connected with the negative pole of polar capacitor C13 after resistance R25, its N pole sequentially after resistance R31 and resistance R32 base stage with audion VT6 be connected.One end of resistance R27 is connected with the source electrode of field effect transistor MOS3, its other end is connected with the emitter stage of audion VT5.
Wherein, the negative pole of polar capacitor C15 is connected with the colelctor electrode of audion VT5 after resistance R28, its positive pole is connected with the base stage of audion VT6 after resistance R29.One end of adjustable resistance R30 is connected with the base stage of audion VT5, its other end is connected with the base stage of audion VT6.One end of resistance R35 is connected with the emitter stage of audion VT6, its other end ground connection.The negative pole of polar capacitor C12 is connected with the grid of field effect transistor MOS3, its positive pole is sequentially connected with the drain electrode of field effect transistor MOS3 after resistance R23 and resistance R24.
Meanwhile, the P pole of diode D9 is connected with the junction point of resistance R23 with resistance R24, the drain electrode with field effect transistor MOS3 after resistance R26 of its N pole is connected.The negative pole of polar capacitor C14 N pole with diode D9 after resistance R33 is connected, its positive pole is connected with audion VT6 base stage after resistance R34.The P pole of diode D11 is connected with the positive pole of polar capacitor C14, its N pole is connected with the colelctor electrode of audion VT6 after resistance R36.The minus earth of described polar capacitor C15；The P pole of described diode D11 is as the outfan of high impedance amplifying circuit and is connected with thyristor gating circuit.
As shown in Figure 4, described ICLC is by audion VT7, audion VT8, audion VT9, audion VT10, critesistor RL, resistance R37, resistance R38, resistance R39, resistance R40, adjustable resistance R41, resistance R42, resistance R43, resistance R44, adjustable resistance R45, resistance R46, polar capacitor C16, polar capacitor C17, polar capacitor C18, diode D12, Zener diode D13, diode D14, and inductance L4 form.
During connection, the N pole of diode D12 is sequentially connected with the base stage of audion VT9 after resistance R44 through resistance R43, its P pole is as the input of ICLC and is connected with low-pass filter circuit.One end of adjustable resistance R45 is connected with the base stage of audion VT9, its other end is connected with the colelctor electrode of audion VT9.The positive pole of polar capacitor C16 P pole with diode D12 after critesistor RL is connected, its negative pole sequentially after resistance R39 and resistance R40 emitter stage with audion VT8 be connected.The negative pole of polar capacitor C17 is connected with the base stage of audion VT7, its positive pole sequentially after resistance R38 and resistance R37 N pole with diode D12 be connected.
Meanwhile, one end of adjustable resistance R41 is connected with the positive pole of polar capacitor C17, its other end is connected with the base stage of audion VT7.The positive pole of polar capacitor C18 is connected with the emitter stage of audion VT8 after resistance R46, its minus earth.The N pole of diode D14 is connected with the emitter stage of audion VT10, its P pole is connected with the negative pole of polar capacitor C18.One end of inductance L4 is connected with the P pole of diode D14, its other end is connected with the emitter stage of audion VT10.The P pole of Zener diode D13 is connected with the base stage of audion VT7 after resistance R42, its N pole is connected with the emitter stage of audion VT10.
The minus earth of described polar capacitor C16；The emitter stage of described audion VT7 is connected with the base stage of mythical animals Buddha's warrior attendant 4, and the colelctor electrode of its audion VT7 is connected with the colelctor electrode of audion VT8 and is all connected with the base stage of audion VT9；The colelctor electrode of described audion VT9 is connected with the colelctor electrode of audion VT10, and the base stage of its audion VT9 is connected with the base stage of audion VT10；The emitter stage of described audion VT10 as outfan and be connected with reference current correcting circuit.
During operation, input terminal voltage electric current can not only be filtered processing by the present invention, the voltage x current making input is more steady, and the intensity of the voltage x current after Filtering Processing of the present invention is adjusted, the electromagnetic motion making electric current remains a constant speed state, and the surge current in input electric current can also be limited by the present invention.Meanwhile, the present invention has stronger driving force, and the driving force of the present invention improves about 60% than the driving force of existing LED power circuit, and namely multiple LED groups can be provided stable driving electric current by the present invention simultaneously.
Present invention employs high-precision L6569 integrated chip, this chip has the functions such as stability is strong, overtemperature protection, overcurrent protection, effectively raises the stability of the output electric current of the present invention.In the service life that can effectively extend LED of the present invention, the electricity of more than 50% can be saved, thus meeting people LED is controlled system demand in energy-conservation simultaneously.
According to above-described embodiment, can well realize the present invention.
Claims (8)
- null1. the high impedance constant current mode cold light LED power circuit of a surge current restriction，It is characterized in that，Main by control chip U2，Transformator T，Diode rectifier U1，The constant-current drive circuit being connected with Same Name of Ends with the non-same polarity of transformator T secondary inductance coil respectively，Negative pole is connected with the cathode output end of diode rectifier U1、The polar capacitor C1 that positive pole is connected with the cathode output end of diode rectifier U1，Negative pole is connected with the CS pin of control chip U2、The polar capacitor C5 that positive pole is connected with the RE pin of control chip U2 after inductance L1，One end is connected with the positive pole of polar capacitor C5、The other end be connected with the GND pin of control chip U2 after the resistance R9 of ground connection，It is serially connected in the reference current correcting circuit between the VCC pin of control chip U2 and VS-pin，With the control chip U2 thyristor gating circuit being connected，It is serially connected in the low-pass filter circuit between diode rectifier U1 and transformator T，It is serially connected in the ICLC between low-pass filter circuit and reference current correcting circuit，And it is serially connected in the high impedance amplifying circuit composition between reference current correcting circuit and thyristor gating circuit；Described reference current correcting circuit is connected with thyristor gating circuit.
- null2. the high impedance constant current mode cold light LED power circuit of a kind of surge current according to claim 1 restriction，It is characterized in that，Described ICLC is by audion VT7，Audion VT8，Audion VT9，Audion VT10，N pole is sequentially connected with the base stage of audion VT9 after resistance R44 through resistance R43、P pole is as the input of ICLC the diode D12 that is connected with low-pass filter circuit，One end is connected with the base stage of audion VT9、The adjustable resistance R45 that the other end is connected with the colelctor electrode of audion VT9，Positive pole P pole with diode D12 after critesistor RL is connected、Negative pole is sequentially through the resistance R39 polar capacitor C16 being connected with the emitter stage of audion VT8 after resistance R40，Negative pole is connected with the base stage of audion VT7、Positive pole is sequentially through the resistance R38 polar capacitor C17 being connected with the N pole of diode D12 after resistance R37，One end is connected with the positive pole of polar capacitor C17、The adjustable resistance R41 that the other end is connected with the base stage of audion VT7，Positive pole is connected with the emitter stage of audion VT8 after resistance R46、The polar capacitor C18 of minus earth，N pole is connected with the emitter stage of audion VT10、The diode D14 that P pole is connected with the negative pole of polar capacitor C18，One end is connected with the P pole of diode D14、The inductance L4 that the other end is connected with the emitter stage of audion VT10，And P pole is connected with the base stage of audion VT7 after resistance R42、The Zener diode D13 composition that N pole is connected with the emitter stage of audion VT10；The minus earth of described polar capacitor C16；The emitter stage of described audion VT7 is connected with the base stage of mythical animals Buddha's warrior attendant 4, and the colelctor electrode of its audion VT7 is connected with the colelctor electrode of audion VT8 and is all connected with the base stage of audion VT9；The colelctor electrode of described audion VT9 is connected with the colelctor electrode of audion VT10, and the base stage of its audion VT9 is connected with the base stage of audion VT10；The emitter stage of described audion VT10 as outfan and be connected with reference current correcting circuit.
- null3. the high impedance constant current mode cold light LED power circuit of a kind of surge current according to claim 2 restriction，It is characterized in that，Described high impedance amplifying circuit is by field effect transistor MOS3，Audion VT5，Audion VT6，One end is connected with the grid of field effect transistor MOS3、The other end is as the input of high impedance amplifying circuit the inductance L3 that is connected with reference current correcting circuit，Positive pole is connected with the grid of field effect transistor MOS3、The polar capacitor C13 of minus earth，P pole is connected with the negative pole of polar capacitor C13 after resistance R25、N pole is sequentially through the resistance R31 diode D10 being connected with the base stage of audion VT6 after resistance R32，One end is connected with the source electrode of field effect transistor MOS3、The resistance R27 that the other end is connected with the emitter stage of audion VT5，Negative pole is connected with the colelctor electrode of audion VT5 after resistance R28、The polar capacitor C15 that positive pole is connected with the base stage of audion VT6 after resistance R29，One end is connected with the base stage of audion VT5、The adjustable resistance R30 that the other end is connected with the base stage of audion VT6，One end is connected with the emitter stage of audion VT6、The resistance R35 of other end ground connection，Negative pole is connected with the grid of field effect transistor MOS3、Positive pole is sequentially through the resistance R23 polar capacitor C12 being connected with the drain electrode of field effect transistor MOS3 after resistance R24，P pole is connected with the junction point of resistance R23 with resistance R24、The diode D9 that N pole is connected with the drain electrode of field effect transistor MOS3 after resistance R26，Negative pole N pole with diode D9 after resistance R33 is connected、The polar capacitor C14 that positive pole is connected with audion VT6 base stage after resistance R34，And P pole is connected with the positive pole of polar capacitor C14、The diode D11 composition that N pole is connected with the colelctor electrode of audion VT6 after resistance R36；The minus earth of described polar capacitor C15；The P pole of described diode D11 is as the outfan of high impedance amplifying circuit and is connected with thyristor gating circuit.
- null4. the high impedance constant current mode cold light LED power circuit of a kind of surge current according to claim 3 restriction，It is characterized in that，Described constant-current drive circuit is by audion VT3，Audion VT4，Positive pole is connected with the base stage of audion VT3 after resistance R16、The polar capacitor C9 that negative pole is connected with the colelctor electrode of audion VT3，N pole is connected with the positive pole of polar capacitor C9 after resistance R18、The diode D7 that P pole is connected with the emitter stage of audion VT3 after resistance R20，One end is connected with the N pole of diode D7、The inductance L2 that the other end is connected with the emitter stage of audion VT4，Positive pole is connected with the base stage of audion VT4 after resistance R21、The polar capacitor C10 that negative pole is connected with the emitter stage of audion VT3，N pole is connected with the colelctor electrode of audion VT4、The emitter stage of its P pole and audion VT4 is collectively forming the Zener diode D8 of the outfan of constant-current drive circuit，Negative pole P pole with Zener diode D8 after resistance R22 is connected、The polar capacitor C11 that positive pole is connected with the emitter stage of audion VT3，One end is connected with the emitter stage of audion VT3、The resistance R19 that the other end is connected with the negative pole of polar capacitor C10，And P pole is connected with the base stage of audion VT3、The diode D6 composition that N pole is connected with the positive pole of polar capacitor C11 after resistance R17；The positive pole of described polar capacitor C9 is connected with the non-same polarity of transformator T secondary inductance coil；The N pole of described diode D6 is connected with the Same Name of Ends of transformator T secondary inductance coil.
- null5. the high impedance constant current mode cold light LED power circuit of a kind of surge current according to claim 4 restriction，It is characterized in that，Described low-pass filter circuit is by audion VT1，P pole is connected with the cathode output end of diode rectifier U1、The diode D1 that N pole is connected with the base stage of audion VT1 after adjustable resistance R2，Positive pole is connected with the P pole of diode D1、The polar capacitor C2 that negative pole is connected with the base stage of audion VT1，P pole is connected with the positive pole of polar capacitor C2、N pole be connected with the colelctor electrode of audion VT1 after the diode D3 of ground connection，One end is connected with the N pole of diode D1、The resistance R3 that the other end is connected with the emitter stage of audion VT1，And positive pole N pole with diode D1 after resistance R4 is connected、The polar capacitor C3 composition that negative pole is connected with the colelctor electrode of audion VT1 after resistance R5；The base stage of described audion VT1 is connected with the P pole of diode D12, and its colelctor electrode is connected with thyristor gating circuit.
- 6. the high impedance constant current mode cold light LED power circuit of a kind of surge current according to claim 5 restriction, it is characterized in that, described reference current correcting circuit is by audion VT2, N pole VCC pin with control chip U after resistance R7 is connected, the diode D2 that P pole is connected with the emitter stage of audion VT2 after resistance R8, positive pole is connected with the colelctor electrode of audion VT2, the polar capacitor C4 of minus earth, P pole is connected with the base stage of audion VT2 after resistance R10, the diode D4 that N pole is connected with the VS pin of control chip U2, and positive pole is sequentially connected with the negative pole of polar capacitor C4 after resistance R11 through resistance R12, the polar capacitor C6 composition that negative pole is connected with the grid of field effect transistor MOS3 after inductance L3；The N pole of described diode D4 is connected with the positive pole of polar capacitor C6；The N pole of described diode D2 is connected with the emitter stage of audion VT10.
- null7. the high impedance constant current mode cold light LED power circuit of a kind of surge current according to claim 6 restriction，It is characterized in that，Described thyristor gating circuit is by field effect transistor MOS1，Field effect transistor MOS2，One end is connected with the LO pin of control chip U2、The resistance R13 that the other end is connected with the grid of field effect transistor MOS2，Negative pole grid with field effect transistor MOS2 after resistance R15 is connected、The polar capacitor C8 that positive pole is connected with the emitter stage of audion VT1，Negative pole is connected with the grid of field effect transistor MOS1、The polar capacitor C7 that positive pole is connected with the HC pin of control chip U2 after resistance R6，One end is connected with the source electrode of field effect transistor MOS1、The resistance R14 that the other end is connected with the VS+ pin of control chip U2，And P pole is connected with the source electrode of field effect transistor MOS2、The diode D5 composition that N pole is connected with the non-same polarity of the former limit inductance coil of transformator T；The grounded drain of described field effect transistor MOS2, its grid is connected with the P pole of diode D11, and its source electrode is connected with the source electrode of field effect transistor MOS1；The drain electrode of described field effect transistor MOS1 is connected with the Same Name of Ends of transformator T former limit inductance coil and the emitter stage of audion VT1 respectively.
- 8. the high impedance constant current mode cold light LED power circuit of a kind of surge current according to claim 7 restriction, it is characterised in that described control chip U2 is L6569 integrated chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610379769.8A CN105813278A (en) | 2016-05-30 | 2016-05-30 | Surge current limiting type high-impedance constant-current luminescent LED (light emitting diode) power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610379769.8A CN105813278A (en) | 2016-05-30 | 2016-05-30 | Surge current limiting type high-impedance constant-current luminescent LED (light emitting diode) power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105813278A true CN105813278A (en) | 2016-07-27 |
Family
ID=56428091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610379769.8A Pending CN105813278A (en) | 2016-05-30 | 2016-05-30 | Surge current limiting type high-impedance constant-current luminescent LED (light emitting diode) power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105813278A (en) |
-
2016
- 2016-05-30 CN CN201610379769.8A patent/CN105813278A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105873286A (en) | Energy-saving power circuit for constant-current drive type cold light LED | |
| CN106163003A (en) | A kind of LED dimming drive power based on ripple peak restrained circuit | |
| CN104869729A (en) | Broad-pulse triggering lowpass filtering LED voltage stabilizing system based on phase processing | |
| CN106211426A (en) | A kind of voltage amplification scale-up version cold light LED energy-saving electric power circuit | |
| CN105813278A (en) | Surge current limiting type high-impedance constant-current luminescent LED (light emitting diode) power circuit | |
| CN105979635A (en) | Source electrode voltage stabilizing power supply based on overvoltage and overcurrent regulator circuit for LED rope lights | |
| CN106061024A (en) | Surge protection type LED soft light lamp power source based on voltage regulation circuit | |
| CN106061031A (en) | Multi-circuit processing type LED constant current driving power supply | |
| CN106028568A (en) | LED constant-current driving power supply based on surge voltage suppression circuit | |
| CN105979634A (en) | High-impedance source electrode voltage-stabilizing power supply for LED lamp band | |
| CN106102211A (en) | Inverse-excitation type LED switch voltage stabilizing based on circuit of power factor correction drives power supply | |
| CN106231720A (en) | A kind of many processing of circuit type LED dimming drive power | |
| CN105873287A (en) | Energy-saving power circuit for high-impedance constant-current drive type cold light LED | |
| CN106102236A (en) | A kind of overcurrent protective cold light LED voltage amplification power circuit | |
| CN105934044A (en) | Multi-way output voltage stabilized power supply for LED based on snubber circuit | |
| CN105979633A (en) | Two-odder active low-pass filter circuit based source electrode voltage-stabilizing power supply for LED lamp band | |
| CN106061026A (en) | Multi-circuit processing type LED digital flat soft light lamp power source | |
| CN106028514A (en) | Over-current protection type high-power LED power supply based on constant current drive circuit | |
| CN106211453A (en) | A kind of ripple suppressive LED dimming drive power based on linear amplifier circuit | |
| CN105916250A (en) | Current-stabilization white light LED noise reduction driving system | |
| CN106132008A (en) | A kind of audion overcurrent protective cold light LED energy-saving electric power circuit | |
| CN105979646A (en) | Operational amplification circuit based white light LED constant-current driving power supply | |
| CN105873293A (en) | Energy-saving power circuit for high-impedance amplification type cold light LED | |
| CN106100410A (en) | A kind of charging based on overvoltage crowbar is with non-linear scale-up version inverter | |
| CN106211439A (en) | A kind of LED power supply based on pulse current-limiting circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160727 |
|
| WD01 | Invention patent application deemed withdrawn after publication |