CN104968078A - Step-up voltage-stabilizing blue-light LED lamp protection system based on multi-output stabilized power supply - Google Patents
Step-up voltage-stabilizing blue-light LED lamp protection system based on multi-output stabilized power supply Download PDFInfo
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Abstract
The invention discloses a step-up voltage-stabilizing blue-light LED lamp protection system based on a multi-output stabilized power supply, and the system mainly consist of a grid drive circuit, a logic control circuit, a power amplifier P1, a power amplifier P2, a pulse comparator U1, a pulse comparator U2, an oscillator, a main error amplifier W1, a safety error amplifier W2, the oscillator, a field effect transistor MOS1, a field effect transistor MOS2, a field effect transistor MOS3, a field effect transistor MOS4, a field effect transistor MOS5, a field effect transistor MOS6, and a step-up voltage-stabilizing circuit. The system not only has functions of short circuit protection, overvoltage protection and open-circuit protection, but also is lower in power consumption, wherein the power consumption of the system is just 1/3 of the power consumption of a conventional protection circuit. Meanwhile, the system can guarantee the stability of a working voltage, and can achieve the better protection of an LED lamp.
Description
Technical field
The present invention relates to a kind of LED protection circuit, specifically refer to the boosting voltage stabilizing blue LED lamp protection system based on multiple-channel output stabilized voltage power supply.
Background technology
At present, because LED has, energy consumption is low, the feature such as long service life and safety and environmental protection, and it has become one of main product of people's life lighting.Because LED is different from traditional incandescent lamp, its needs are driven by special drive circuit, have therefore just occurred the protection system for preventing drive system from disturbing from inner or outside unfavorable factor miscellaneous on the market.
Although these protection systems all possess short-circuit protection function and overheat protective function mostly, the structure of these protection systems often all more complicated, its maintenance difficulty is larger.Meanwhile, the energy consumption of these protection systems is higher, and the dynamics effectively avoiding LED lamp drive circuit self circuit to affect is poor, can not effectively protect whole drive circuit.
Summary of the invention
The object of the invention is to overcome the complex structure existing for current LED protection system, energy consumption is higher, and the defect that general protection dynamics is poor, the boosting voltage stabilizing blue LED lamp protection system based on multiple-channel output stabilized voltage power supply is provided.
Object of the present invention is achieved through the following technical solutions: based on the boosting voltage stabilizing blue LED lamp protection system of multiple-channel output stabilized voltage power supply, it comprises gate driver circuit, logic control circuit, oscillator, the power amplifier P1 that andlogic control circuit is connected and power amplifier P2, the pulse comparator U1 that andlogic control circuit is connected and pulse comparator U2, the field effect transistor MOS1 that grid is all connected with gate driver circuit, field effect transistor MOS2, field effect transistor MOS3 and field effect transistor MOS4, the main error amplifier W1 that output is connected with the electrode input end of pulse comparator U1 and error on the safe side amplifier W2, the field effect transistor MOS5 that source electrode is all connected with the output of error on the safe side amplifier W2 with main error amplifier W1 and field effect transistor MOS6, respectively with field effect transistor MOS1, field effect transistor MOS3, power amplifier P1 is connected with power amplifier P2 and provides the multiple-channel output stabilized voltage power supply of electric current for it, and output is connected with negative input with the electrode input end of pulse comparator U2, the voltage stabilizing voltage stabilizing circuit that input is then connected with the electrode input end of oscillator and pulse comparator U1 respectively.
Further, the drain electrode of described field effect transistor MOS1 is connected with the source electrode of field effect transistor MOS2, and its source electrode is connected with the V1 voltage end of multiple-channel output stabilized voltage power supply; The grid of field effect transistor MOS2 is connected with the electrode input end of power amplifier P1, its grounded drain; The drain electrode of field effect transistor MOS3 is connected with the source electrode of field effect transistor MOS4, and its source electrode is connected with the V1 voltage end of multiple-channel output stabilized voltage power supply; The grid of field effect transistor MOS4 is connected with the electrode input end of power amplifier P2, its grounded drain; The negative input of described power amplifier P1 is connected with the V2 voltage end of multiple-channel output stabilized voltage power supply, and the negative input of power amplifier P2 is connected with the V3 voltage end of multiple-channel output stabilized voltage power supply; The electrode input end of described pulse comparator U1, the output of main error amplifier W1 are all connected with the V2 voltage end of multiple-channel output stabilized voltage power supply with the output of error on the safe side amplifier W2; The electrode input end of described main error amplifier W1 is connected with the electrode input end of error on the safe side amplifier W2, the negative input of main error amplifier W1 and all external 1.23V voltage of negative input of error on the safe side amplifier W2; The drain electrode of described field effect transistor MOS5 and the equal ground connection of the drain electrode of field effect transistor MOS6.
Described voltage boosting and stabilizing circuit is by boost chip U3, field effect transistor MOS7, N pole is connected with the drain electrode of field effect transistor MOS1, the P pole then voltage stabilizing didoe D8 of ground connection after inductance L 5 and resistance R1 and resistance R2 in turn, one end is connected with the RT pin of boost chip U3, the resistance R3 of other end ground connection, positive pole is connected with the SS pin of boost chip U3, the polar capacitor C13 of minus earth, be serially connected in the polar capacitor C14 between the COMP pin of boost chip U3 and FB pin, collector electrode is connected with the CS pin of boost chip U3 after resistance R4, base stage is then connected with the FB pin of boost chip U3 after resistance R5, the triode Q1 of grounded emitter, and one end is connected with the GND pin of boost chip U3, the resistance R6 of other end ground connection forms, the VIN pin of described boost chip U3 is connected with the tie point of inductance L 5 with resistance R1, its UVLO pin is then connected with the tie point of resistance R2 with resistance R1, OUT pin is then connected with the grid of field effect transistor MOS7, its VCC pin is then connected with its UVLO pin, as an output stage of this voltage boosting and stabilizing circuit while the source electrode of described field effect transistor MOS7 is connected with the collector electrode of triode Q1, this output stage is connected with the electrode input end of pulse comparator U2, the drain electrode of field effect transistor MOS7 is then as another output stage of this voltage boosting and stabilizing circuit, and this output stage is then connected with the negative input of pulse comparator U2, the VIN pin of described boost chip U3 forms an input pole of this voltage boosting and stabilizing circuit, and this input pole is connected with oscillator, the UVLO pin of boost chip U3 then forms another input pole of this voltage boosting and stabilizing circuit, and this input pole is then connected with the electrode input end of pulse comparator U1, described oscillator is also connected with the negative input of pulse comparator U1.
Described multiple-channel output stabilized voltage power supply is by transformer T, the first output circuit be connected with the secondary coil L2 of transformer T, the second output circuit be connected with the secondary coil L3 of transformer T and the 3rd output circuit be connected with the secondary coil L4 of transformer T form.
Described first output circuit is made up of diode D1, electric capacity C1, electric capacity C2 and inductance L 5, and the P pole of described diode D1 is connected with the Same Name of Ends of secondary coil L2, its N pole is then connected with the non-same polarity of secondary coil L2 after electric capacity C1; One end of inductance L 5 is connected with the tie point of electric capacity C1 with diode D1, the other end is then connected with the non-same polarity of secondary coil L2 after electric capacity C2; The two ends of electric capacity C2 then form V1 voltage end.
Described second output circuit is made up of diode rectifier Z1, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, integrated regulator W7806 and integrated regulator W7809; Input and the secondary coil L3 of described diode rectifier Z1 are in parallel, and the positive pole of electric capacity C3 is connected with the cathode output end of diode rectifier Z1, its negative pole is then connected with the cathode output end of diode rectifier Z1; The positive pole of electric capacity C4 is connected with the positive pole of electric capacity C3, its negative pole is connected with the positive pole of electric capacity C5, and the negative pole of electric capacity C5 is then connected with the negative pole of electric capacity C3; First output of integrated regulator W7806 is connected with the positive pole of electric capacity C4, the negative pole of its second output then electric capacity C4 is connected; First output of integrated regulator W7809 is connected with the positive pole of electric capacity C5, the negative pole of its second output then electric capacity C5 is connected, and electric capacity C6 is then serially connected between first output of integrated regulator W7809 and the 3rd output; 3rd output of described integrated regulator W7806 and the 3rd output of integrated regulator W7809 then form V2 voltage end.
Described 3rd output circuit is made up of diode rectifier Z2, electric capacity C7, electric capacity C8, electric capacity C9, diode D2 and integrated regulator W7809; Input and the secondary coil L4 of described diode rectifier Z2 are in parallel, between the cathode output end being then serially connected in diode rectifier Z2 of electric capacity C7 and cathode output end, electric capacity C8 and electric capacity C7 is in parallel, and electric capacity C9 is serially connected between the 3rd output of integrated regulator W7809 and the second output; Diode D2 is then serially connected between first output of integrated regulator W7809 and the 3rd output; The two ends of electric capacity C9 then form V3 voltage end.
Described boost chip U3 is LM5020 integrated circuit.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention not only has the function of short-circuit protection, overvoltage protection and open-circuit-protection, and its power consumption is lower, is only 1/3 of conventional protection circuit power consumption.
(2) the present invention is provided with multiple-channel output stabilized voltage power supply, therefore can guarantee the need for electricity of protective circuit self, effectively can avoid external electromagnetic interference, improves the sensitivity and precision that control.
(3) the present invention also has undervoltage lockout function, effectively can overcome the late effect of conventional protection circuit.
(4) the present invention can guarantee the stability of its operating voltage, thus can better protect LED.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is multiple-channel output stabilized voltage power supply structural representation of the present invention.
Fig. 3 is logic control circuit structural representation of the present invention.
Fig. 4 is voltage boosting and stabilizing circuit structural representation 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; blue LED lamp protection system based on multiple-channel output stabilized voltage power supply of the present invention, it is primarily of gate driver circuit, logic control circuit, power amplifier P1, power amplifier P2, pulse comparator U1, pulse comparator U2, oscillator, main error amplifier W1, error on the safe side amplifier W2, multiple-channel output stabilized voltage power supply and field effect transistor MOS1, field effect transistor MOS2, field effect transistor MOS3, field effect transistor MOS4, field effect transistor MOS5, field effect transistor MOS6 and voltage boosting and stabilizing circuit composition.
Wherein, gate driver circuit is used for providing gate drive voltage for field effect transistor MOS1, field effect transistor MOS2, field effect transistor MOS3 and field effect transistor MOS4, and logic control circuit is then for Logic judgment of the present invention and process.Due to the technology that this gate driver circuit is comparatively ripe at present, therefore the present invention does not just do too much description at this.
As shown in Figure 2, this multiple-channel output stabilized voltage power supply is by transformer T, the first output circuit be connected with the secondary coil L2 of transformer T, the second output circuit be connected with the secondary coil L3 of transformer T and the 3rd output circuit be connected with the secondary coil L4 of transformer T form.
Wherein, the first output circuit is made up of diode D1, electric capacity C1, electric capacity C2 and inductance L 5, and the P pole of described diode D1 is connected with the Same Name of Ends of secondary coil L2, its N pole is then connected with the non-same polarity of secondary coil L2 after electric capacity C1; One end of inductance L 5 is connected with the tie point of electric capacity C1 with diode D1, the other end is then connected with the non-same polarity of secondary coil L2 after electric capacity C2; The two ends of electric capacity C2 then form V1 voltage end.
Second output circuit is made up of diode rectifier Z1, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, integrated regulator W7806 and integrated regulator W7809; Input and the secondary coil L3 of described diode rectifier Z1 are in parallel, and the positive pole of electric capacity C3 is connected with the cathode output end of diode rectifier Z1, its negative pole is then connected with the cathode output end of diode rectifier Z1; The positive pole of electric capacity C4 is connected with the positive pole of electric capacity C3, its negative pole is connected with the positive pole of electric capacity C5, and the negative pole of electric capacity C5 is then connected with the negative pole of electric capacity C3; First output of integrated regulator W7806 is connected with the positive pole of electric capacity C4, the negative pole of its second output then electric capacity C4 is connected.
First output of integrated regulator W7809 is connected with the positive pole of electric capacity C5, the negative pole of its second output then electric capacity C5 is connected, and electric capacity C6 is then serially connected between first output of integrated regulator W7809 and the 3rd output; 3rd output of described integrated regulator W7806 and the 3rd output of integrated regulator W7809 then form V2 voltage end.
Because the second output has two groups of magnitudes of voltage, i.e.+6V as described in Figure 2 and-6V, therefore in use, the application only need connect the link of its+6V.
3rd output circuit is made up of diode rectifier Z2, electric capacity C7, electric capacity C8, electric capacity C9, diode D2 and integrated regulator W7809; Input and the secondary coil L4 of described diode rectifier Z2 are in parallel, between the cathode output end being then serially connected in diode rectifier Z2 of electric capacity C7 and cathode output end, electric capacity C8 and electric capacity C7 is in parallel, and electric capacity C9 is serially connected between the 3rd output of integrated regulator W7809 and the second output; Diode D2 is then serially connected between first output of integrated regulator W7809 and the 3rd output; The two ends of electric capacity C9 then form V3 voltage end
During connection, the grid of described field effect transistor MOS1 will be connected with gate driver circuit, and its drain electrode is connected with the source electrode of field effect transistor MOS2, and its source electrode then needs to be connected with the V1 voltage end of multiple-channel output stabilized voltage power supply.The grid of field effect transistor MOS2 is connected with the electrode input end of gate driver circuit with power amplifier P1 simultaneously, its grounded drain.The grid of field effect transistor MOS3 is connected with gate driver circuit, and its drain electrode is connected with the source electrode of field effect transistor MOS4, and its source electrode is connected with the V1 voltage end of multiple-channel output stabilized voltage power supply equally.The grid of field effect transistor MOS4 is connected with the electrode input end of gate driver circuit with power amplifier P2 simultaneously, its grounded drain.
The output of described power amplifier P1 and power amplifier P2 then all andlogic control circuit be connected.Consider the actual features of logic control circuit, the negative input of the power amplifier P1 in the application needs the V2 voltage end of external multiple-channel output stabilized voltage power supply, the negative input of power amplifier P2 then needs the V3 voltage end of external multiple-channel output stabilized voltage power supply, the input voltage of the power amplifier P2 namely in the application lower than the input voltage of power amplifier P1, just must can guarantee the normal work of logic control circuit.
Meanwhile, pulse comparator U1 also wants andlogic control circuit to be connected with the output of pulse comparator U2.Between the negative input that oscillator is then serially connected in pulse comparator U1 and voltage boosting and stabilizing circuit.To guarantee that this oscillator can for pulse comparator U1 and voltage boosting and stabilizing circuit input pulse signal.
The output of described main error amplifier W1 and error on the safe side amplifier W2, and the electrode input end of pulse comparator U1 all will be connected with the V2 voltage end of multiple-channel output stabilized voltage power supply, so as by this multiple-channel output stabilized voltage power supply be main error amplifier W1, error on the safe side amplifier W2, pulse comparator U1 provide operating voltage.
Wherein, main error amplifier W1 is used for the process being responsible for the application's medial error coefficient, and error on the safe side amplifier W2 is then for preventing short circuit or instantaneous high pressure to the destruction of native system.During connection, the electrode input end of this main error amplifier W1 will be connected with the electrode input end of error on the safe side amplifier W2, and all external 1.23V voltage of the negative input of the negative input of main error amplifier W1 and error on the safe side amplifier W2.
The voltage of the grid of described field effect transistor MOS5 and all external+1.23V of the grid of field effect transistor MOS6, field effect transistor MOS5 is then connected with the output of error on the safe side amplifier W2 with main error amplifier W1 respectively with the source electrode of field effect transistor MOS6, meanwhile, the drain electrode of field effect transistor MOS5 and the equal ground connection of the drain electrode of field effect transistor MOS6.
The structure of logic control circuit of the present invention as shown in Figure 3, it is by NAND gate IC4, the not gate IC5 that input is connected with the output of NAND gate IC4, the not gate IC3 that output is connected with the negative input of NAND gate IC4, and the first logical links be connected with the electrode input end of NAND gate IC4 and the second logical links form.
Wherein, this first logical links is made up of not gate IC1, not gate IC2, resistance R13, diode D5, filter delay circuit, resistance R10, resistance R11, electric capacity C10 and diode D3.During connection, the output of the input NAND gate IC1 of not gate IC2 is connected, and its output is then connected with the electrode input end of NAND gate IC4 after diode D5 through resistance R13 in turn.Meanwhile, filter delay circuit will be connected with the electrode input end of NAND gate IC4.
The input of the P pole NAND gate IC1 of diode D3 is connected, its N pole is connected through the input of resistance R11 NAND gate IC1 after electric capacity C10 in turn, namely needs in turn to form an electric loop with the P pole of diode D3 after resistance R11 and electric capacity C10 from the N pole of diode D3.Resistance R10 is then in parallel with diode D3.Meanwhile, the tie point ground connection of described electric capacity C10 and resistance R11, the N pole of diode D3 needs to be connected with the output of power amplifier P1, and the output of not gate IC2 is then all connected with the output of power amplifier P2 with the output of not gate IC5.
Described filter delay circuit is by electrochemical capacitor C12, and the resistance R14 be serially connected between the positive pole of electrochemical capacitor C12 and negative pole forms, during connection, the N pole of diode D5 will be connected with the positive pole of this electrochemical capacitor C12, and namely the electrode input end of NAND gate IC4 will be connected with the positive pole of electrochemical capacitor C12.
The second described logical links is made up of XOR gate IC6, diode D4, diode D6, diode D7, resistance R12 and electric capacity C11.During connection, the P pole of diode D6 is connected with the electrode input end of NAND gate IC4, and its N pole is connected with the first input end of XOR gate IC6.The input of the N pole NAND gate IC3 of diode D4 is connected, and its P pole is connected with the output of pulse comparator U1; Resistance R12 is then in parallel with diode D4.
The positive pole of electric capacity C11 is connected with the N pole of diode D4, its minus earth; The N pole of diode D7 is connected with the first input end of XOR gate IC6, and its P pole is connected with the output of pulse comparator U1.Meanwhile, the output of the second input NAND gate IC5 of XOR gate IC6 is connected, and the output of XOR gate IC6 is then connected with the output of pulse comparator U2.
The structure of voltage boosting and stabilizing circuit as shown in Figure 4, it is by boost chip U3, field effect transistor MOS7, N pole is connected with the drain electrode of field effect transistor MOS1, the P pole then voltage stabilizing didoe D8 of ground connection after inductance L 5 and resistance R1 and resistance R2 in turn, one end is connected with the RT pin of boost chip U3, the resistance R3 of other end ground connection, positive pole is connected with the SS pin of boost chip U3, the polar capacitor C13 of minus earth, be serially connected in the polar capacitor C14 between the COMP pin of boost chip U3 and FB pin, collector electrode is connected with the CS pin of boost chip U3 after resistance R4, base stage is then connected with the FB pin of boost chip U3 after resistance R5, the triode Q1 of grounded emitter, and one end is connected with the GND pin of boost chip U3, the resistance R6 of other end ground connection forms.
During connection, the VIN pin of described boost chip U3 is connected with the tie point of inductance L 5 with resistance R1, its UVLO pin is then connected with the tie point of resistance R2 with resistance R1, OUT pin is then connected with the grid of field effect transistor MOS7, its VCC pin is then connected with its UVLO pin.As an output stage of this voltage boosting and stabilizing circuit while the source electrode of described field effect transistor MOS7 is connected with the collector electrode of triode Q1, this output stage is connected with the electrode input end of pulse comparator U2; The drain electrode of field effect transistor MOS7 is then as another output stage of this voltage boosting and stabilizing circuit, and this output stage is then connected with the negative input of pulse comparator U2.This field effect transistor MOS1 then can protection system self thus, makes it damage from high voltage.
The VIN pin of described boost chip U3 forms an input pole of this voltage boosting and stabilizing circuit, and this input pole is connected with oscillator; The UVLO pin of boost chip U3 then forms another input pole of this voltage boosting and stabilizing circuit, and this input pole is then connected with the electrode input end of pulse comparator U1; Described oscillator is also connected with the negative input of pulse comparator U1.In order to reach effect of better boosting, this boost chip U1 preferentially adopts LM5020 integrated circuit to realize.
As mentioned above, just the present invention can well be realized.
Claims (6)
1. based on the boosting voltage stabilizing blue LED lamp protection system of multiple-channel output stabilized voltage power supply, it comprises gate driver circuit, logic control circuit, oscillator, the power amplifier P1 that andlogic control circuit is connected and power amplifier P2, the pulse comparator U1 that andlogic control circuit is connected and pulse comparator U2, the field effect transistor MOS1 that grid is all connected with gate driver circuit, field effect transistor MOS2, field effect transistor MOS3 and field effect transistor MOS4, the main error amplifier W1 that output is connected with the electrode input end of pulse comparator U1 and error on the safe side amplifier W2, the field effect transistor MOS5 that source electrode is all connected with the output of error on the safe side amplifier W2 with main error amplifier W1 and field effect transistor MOS6, and respectively with field effect transistor MOS1, field effect transistor MOS3, power amplifier P1 is connected with power amplifier P2 and provides the multiple-channel output stabilized voltage power supply of electric current for it, the drain electrode of described field effect transistor MOS1 is connected with the source electrode of field effect transistor MOS2, and its source electrode is connected with the V1 voltage end of multiple-channel output stabilized voltage power supply, the grid of field effect transistor MOS2 is connected with the electrode input end of power amplifier P1, its grounded drain, the drain electrode of field effect transistor MOS3 is connected with the source electrode of field effect transistor MOS4, and its source electrode is connected with the V1 voltage end of multiple-channel output stabilized voltage power supply, the grid of field effect transistor MOS4 is connected with the electrode input end of power amplifier P2, its grounded drain, the negative input of described power amplifier P1 is connected with the V2 voltage end of multiple-channel output stabilized voltage power supply, and the negative input of power amplifier P2 is connected with the V3 voltage end of multiple-channel output stabilized voltage power supply, the electrode input end of described pulse comparator U1, the output of main error amplifier W1 are all connected with the V2 voltage end of multiple-channel output stabilized voltage power supply with the output of error on the safe side amplifier W2, the electrode input end of described main error amplifier W1 is connected with the electrode input end of error on the safe side amplifier W2, the negative input of main error amplifier W1 and all external 1.23V voltage of negative input of error on the safe side amplifier W2, the drain electrode of described field effect transistor MOS5 and the equal ground connection of the drain electrode of field effect transistor MOS6, it is characterized in that, the electrode input end also including output and pulse comparator U2 is connected with negative input the voltage stabilizing voltage stabilizing circuit that input is then connected with the electrode input end of oscillator and pulse comparator U1 respectively, described voltage boosting and stabilizing circuit is by boost chip U3, field effect transistor MOS7, N pole is connected with the drain electrode of field effect transistor MOS1, the P pole then voltage stabilizing didoe D8 of ground connection after inductance L 5 and resistance R1 and resistance R2 in turn, one end is connected with the RT pin of boost chip U3, the resistance R3 of other end ground connection, positive pole is connected with the SS pin of boost chip U3, the polar capacitor C13 of minus earth, be serially connected in the polar capacitor C14 between the COMP pin of boost chip U3 and FB pin, collector electrode is connected with the CS pin of boost chip U3 after resistance R4, base stage is then connected with the FB pin of boost chip U3 after resistance R5, the triode Q1 of grounded emitter, and one end is connected with the GND pin of boost chip U3, the resistance R6 of other end ground connection forms, the VIN pin of described boost chip U3 is connected with the tie point of inductance L 5 with resistance R1, its UVLO pin is then connected with the tie point of resistance R2 with resistance R1, OUT pin is then connected with the grid of field effect transistor MOS7, its VCC pin is then connected with its UVLO pin, as an output stage of this voltage boosting and stabilizing circuit while the source electrode of described field effect transistor MOS7 is connected with the collector electrode of triode Q1, this output stage is connected with the electrode input end of pulse comparator U2, the drain electrode of field effect transistor MOS7 is then as another output stage of this voltage boosting and stabilizing circuit, and this output stage is then connected with the negative input of pulse comparator U2, the VIN pin of described boost chip U3 forms an input pole of this voltage boosting and stabilizing circuit, and this input pole is connected with oscillator, the UVLO pin of boost chip U3 then forms another input pole of this voltage boosting and stabilizing circuit, and this input pole is then connected with the electrode input end of pulse comparator U1, described oscillator is also connected with the negative input of pulse comparator U1.
2. the boosting voltage stabilizing blue LED lamp protection system based on multiple-channel output stabilized voltage power supply according to claim 1; it is characterized in that; described multiple-channel output stabilized voltage power supply is by transformer T; the first output circuit be connected with the secondary coil L2 of transformer T, the second output circuit be connected with the secondary coil L3 of transformer T and the 3rd output circuit be connected with the secondary coil L4 of transformer T form.
3. the boosting voltage stabilizing blue LED lamp protection system based on multiple-channel output stabilized voltage power supply according to claim 2, it is characterized in that, described first output circuit is made up of diode D1, electric capacity C1, electric capacity C2 and inductance L 5, and the P pole of described diode D1 is connected with the Same Name of Ends of secondary coil L2, its N pole is then connected with the non-same polarity of secondary coil L2 after electric capacity C1; One end of inductance L 5 is connected with the tie point of electric capacity C1 with diode D1, the other end is then connected with the non-same polarity of secondary coil L2 after electric capacity C2; The two ends of electric capacity C2 then form V1 voltage end.
4. the boosting voltage stabilizing blue LED lamp protection system based on multiple-channel output stabilized voltage power supply according to claim 3, it is characterized in that, described second output circuit is made up of diode rectifier Z1, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, integrated regulator W7806 and integrated regulator W7809; Input and the secondary coil L3 of described diode rectifier Z1 are in parallel, and the positive pole of electric capacity C3 is connected with the cathode output end of diode rectifier Z1, its negative pole is then connected with the cathode output end of diode rectifier Z1; The positive pole of electric capacity C4 is connected with the positive pole of electric capacity C3, its negative pole is connected with the positive pole of electric capacity C5, and the negative pole of electric capacity C5 is then connected with the negative pole of electric capacity C3; First output of integrated regulator W7806 is connected with the positive pole of electric capacity C4, the negative pole of its second output then electric capacity C4 is connected; First output of integrated regulator W7809 is connected with the positive pole of electric capacity C5, the negative pole of its second output then electric capacity C5 is connected, and electric capacity C6 is then serially connected between first output of integrated regulator W7809 and the 3rd output; 3rd output of described integrated regulator W7806 and the 3rd output of integrated regulator W7809 then form V2 voltage end.
5. the boosting voltage stabilizing blue LED lamp protection system based on multiple-channel output stabilized voltage power supply according to claim 4, it is characterized in that, described 3rd output circuit is made up of diode rectifier Z2, electric capacity C7, electric capacity C8, electric capacity C9, diode D2 and integrated regulator W7809; Input and the secondary coil L4 of described diode rectifier Z2 are in parallel, between the cathode output end being then serially connected in diode rectifier Z2 of electric capacity C7 and cathode output end, electric capacity C8 and electric capacity C7 is in parallel, and electric capacity C9 is serially connected between the 3rd output of integrated regulator W7809 and the second output; Diode D2 is then serially connected between first output of integrated regulator W7809 and the 3rd output; The two ends of electric capacity C9 then form V3 voltage end.
6. the boosting voltage stabilizing blue LED lamp protection system based on multiple-channel output stabilized voltage power supply according to claim 5, it is characterized in that, described boost chip U3 is LM5020 integrated circuit.
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| CN201510323879.8A CN104968078A (en) | 2014-11-22 | 2015-06-13 | Step-up voltage-stabilizing blue-light LED lamp protection system based on multi-output stabilized power supply |
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| CN201410675571.5A CN104602395A (en) | 2014-11-22 | 2014-11-22 | Multiplexed output voltage-stabilized source based blue light LED lamp protection system |
| CN2014106755715 | 2014-11-22 | ||
| CN201510323879.8A CN104968078A (en) | 2014-11-22 | 2015-06-13 | Step-up voltage-stabilizing blue-light LED lamp protection system based on multi-output stabilized power supply |
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Application publication date: 20151007 |