CN109246892B - Linear voltage stabilizing circuit and voltage stabilizing power supply system - Google Patents
Linear voltage stabilizing circuit and voltage stabilizing power supply system Download PDFInfo
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- CN109246892B CN109246892B CN201811162595.5A CN201811162595A CN109246892B CN 109246892 B CN109246892 B CN 109246892B CN 201811162595 A CN201811162595 A CN 201811162595A CN 109246892 B CN109246892 B CN 109246892B
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- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 75
- 239000003990 capacitor Substances 0.000 claims description 70
- 101150075071 TRS1 gene Proteins 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000005286 illumination Methods 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 description 8
- 239000004743 Polypropylene Substances 0.000 description 7
- -1 polypropylene Polymers 0.000 description 7
- 229920001155 polypropylene Polymers 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 208000025274 Lightning injury Diseases 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001795 light effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
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- 238000005070 sampling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The invention discloses a linear voltage stabilizing circuit and a voltage stabilizing power supply system, which comprise a voltage stabilizing input unit, a voltage stabilizing unit and a control chip, wherein the output end of the voltage stabilizing input unit is electrically connected with the input end of the voltage stabilizing unit, and the output end of the voltage stabilizing unit is electrically connected with the control chip. The invention relates to a linear voltage stabilizing circuit and a voltage stabilizing power supply system, which can meet the requirement of accessing a plurality of LED lamps and is compatible with a larger voltage range by arranging a voltage stabilizing input unit, a voltage stabilizing unit and a control chip, so that a control IC in the power supply system can work normally, the problem of burning out the control IC in the power supply system is avoided, the LED lamps can be used for normal illumination, and the reliability and the compatibility of the power supply system are improved.
Description
Technical Field
The present invention relates to the field of stabilized voltage power supplies, and in particular, to a linear voltage stabilizing circuit and a stabilized voltage power supply system.
Background
The LED is used as an indication light source of instruments and meters at first, and the LEDs with various light colors are widely applied to traffic signal lamps and large-area display screens later, so that good economic and social benefits are generated. Taking a 12 inch red traffic signal as an example, a long life, low luminous efficacy 140 watt incandescent lamp is used as the light source in the united states, which produces 2000 lumens of white light. After passing through the red filter, the light is lost by 90%, leaving only 200 lumens of red light. In the newly designed lamp, the company Lumileds uses 18 red LED light sources, including circuit loss, and consumes 14 watts of electricity to generate the same light effect. Automotive signal lamps are also an important area of LED light source application.
However, in the existing power supply system, the connection of a single LED lamp can be generally satisfied, and the specification of the single LED lamp is 3V/0.6A, that is, in the existing power supply system, only 3V of voltage can be connected, if the number of LED lamps is to be increased, the input voltage is increased, and then the voltage of a control IC input into the power supply system is increased, so that the control IC in the power supply system cannot work, and the control IC in the power supply system may be burnt out when serious, so that the LED lamp cannot normally illuminate, and the reliability and compatibility of the power supply system are reduced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a linear voltage stabilizing circuit and a voltage stabilizing power supply system, which can meet the requirement of accessing a plurality of LED lamps, are compatible with a larger voltage range, further enable a control IC in the power supply system to work normally, avoid the problem of burning the control IC in the power supply system, further enable the LED lamps to illuminate normally, and improve the reliability and compatibility of the power supply system.
The aim of the invention is realized by the following technical scheme:
a linear voltage regulator circuit, comprising: the device comprises a voltage stabilizing input unit, a voltage stabilizing unit and a control chip, wherein the output end of the voltage stabilizing input unit is electrically connected with the input end of the voltage stabilizing unit, and the output end of the voltage stabilizing unit is electrically connected with the control chip;
the voltage stabilizing unit comprises a resistor R3, a diode D2, a resistor R7, a triode Q2 and a voltage stabilizing diode ZD2, wherein a first end of the resistor R3 is electrically connected with an output end of the voltage stabilizing input unit, a second end of the resistor R3 is electrically connected with a collector electrode of the triode Q2 after passing through the diode D2, a base electrode of the triode Q2 is electrically connected with an anode electrode of the diode D2, an emitting electrode of the triode Q2 is electrically connected with the control chip, a cathode electrode of the diode D2 is grounded, a first end of the resistor R7 is electrically connected with the collector electrode of the triode Q2, and a second end of the resistor R7 is electrically connected with the base electrode of the triode Q2.
In one embodiment, the voltage stabilizing input unit includes a transformer T1, a resistor R4, and a resistor R5, wherein a first end of the resistor R4 is electrically connected to one end of the transformer T1, a first end of the resistor R5 is electrically connected to the other end of the transformer T1, and a second end of the resistor R4 is electrically connected to the second end of the resistor R5.
In one embodiment, the linear voltage stabilizing circuit further includes a driving unit, one end of the driving unit is electrically connected to one end of the transformer T1, and the other end of the driving unit is electrically connected to the control chip.
In one embodiment, the driving unit includes a resistor R8, a resistor R9, a diode D2 and a MOS transistor Q1, a D pole of the MOS transistor Q1 is electrically connected to one end of the transformer T1, an S pole of the MOS transistor Q1 is grounded, a G pole of the MOS transistor Q1 is electrically connected to the control chip after passing through the diode D2 and the resistor R9, a first end of the resistor R8 is electrically connected to a G pole of the MOS transistor Q1, and a second end of the resistor R8 is electrically connected to the control chip.
In one embodiment, the linear voltage stabilizing circuit further includes a feedback unit, one end of the feedback unit is electrically connected to one end of the transformer T1, and the other end of the feedback unit is electrically connected to the control chip.
In one embodiment, the feedback unit includes a resistor R12, a resistor R13, a resistor R14, a resistor R15, and a zener diode ZD1, one end of the resistor R13 is electrically connected to one end of the transformer T1, the other end of the resistor R13 is electrically connected to a cathode of the zener diode ZD1, an anode of the zener diode ZD1 is grounded, two ends of the resistor R14 are connected in parallel to two ends of the zener diode ZD1, and the resistor R14 is further electrically connected to one end of the transformer T1, two ends of the resistor R15 are connected in parallel to two ends of the zener diode ZD1, one end of the resistor R12 is electrically connected to a cathode of the zener diode ZD1, and the other end of the resistor R12 is electrically connected to the control chip.
In one embodiment, the voltage stabilizing unit further includes a capacitor CE1, one end of the capacitor CE1 is electrically connected to the cathode of the diode D2, and the other end of the capacitor CE1 is grounded.
In one embodiment, the voltage stabilizing unit further includes a capacitor CE2, one end of the capacitor CE2 is electrically connected to the emitter of the triode Q2, and the other end of the capacitor CE2 is grounded.
In one embodiment, the linear voltage stabilizing circuit further includes a temperature fuse TRS1, one end of the temperature fuse TRS1 is electrically connected to the emitter of the triode Q2, and the other end of the temperature fuse TRS1 is electrically connected to the VCC pin of the control chip.
A regulated power supply system comprising the linear voltage regulator circuit described above.
Compared with the prior art, the invention has the following advantages:
the invention relates to a linear voltage stabilizing circuit and a voltage stabilizing power supply system, which can meet the requirement of accessing a plurality of LED lamps and is compatible with a larger voltage range by arranging a voltage stabilizing input unit, a voltage stabilizing unit and a control chip, so that a control IC in the power supply system can work normally, the problem of burning out the control IC in the power supply system is avoided, the LED lamps can be used for normal illumination, and the reliability and the compatibility of the power supply system are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic circuit diagram of an efficient filter circuit according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of an efficient filter circuit according to another embodiment of the present invention
Fig. 3 is a schematic circuit diagram of a linear voltage stabilizing circuit according to an embodiment of the present invention.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
It can be appreciated that the LED has the main characteristics of small volume, high efficiency, energy saving, high brightness, low heat, long service life, safety, environmental protection, firmness, durability, etc., so that the LED has wide application, and is an ideal light source to replace the traditional light source. Therefore, the LED power supply is also receiving increasing attention, and at present, the LED power supply used is mainly a switching power supply, a direct supply type power supply and a resistance-capacitance step-down type power supply. It is known that the aforementioned LED power supply includes an X capacitor, an electrolytic capacitor, and the like, and the product power factor is low due to the charging and discharging of the X capacitor and the electrolytic capacitor, and the usage rate of the aforementioned LED power supply to the grid power supply is low, so that the usage rate of the aforementioned LED power supply to the grid power supply is low, which also increases the power supply loss on the line. In addition, when the current is output, the existing LED power supply is easy to generate ripple waves, and the stability of a power supply system is reduced.
Referring to fig. 1, a regulated power supply system includes a linear regulator circuit. The stabilized voltage power supply system further comprises an efficient filter circuit, and the efficient filter circuit is electrically connected with the linear stabilized voltage circuit.
A high efficiency filter circuit comprising: the input rectifying unit, the high power factor unit, the voltage conversion unit and the filtering unit are electrically connected in sequence; the input rectifying unit is used for connecting a power grid and rectifying alternating current into direct current; the high power factor unit is used for improving the power factor value of the power supply and improving the utilization rate of the power supply of the power grid; the voltage conversion unit is used for converting the voltage into the working voltage of the LED lamp, and the filtering unit is used for filtering ripple waves in the current, so that the LED is prevented from flickering when the LED emits light.
The high-power factor unit comprises a capacitor C1, a capacitor C2 and an inductor L3, wherein two ends of the capacitor C1 are respectively and electrically connected with two output ends of the input rectifying unit, two ends of the capacitor C2 are connected with two ends of the capacitor C1 in parallel, and two ends of the inductor L3 are respectively and electrically connected with one end of the capacitor C1 and one end of the capacitor C2. Preferably, the inductance L3 is an i-shaped differential mode inductance.
Furthermore, the circuit abandons an EMI filtering circuit formed by the traditional X capacitor and the common-mode inductor and electrolytic capacitor filtering after the rectifying circuit. The power supply is rectified into a frequency multiplication direct current pulse power supply by adopting a rectification circuit, the power supply further comprises a differential mode inductor, a first metallized polypropylene film capacitor C1, a first I-shaped inductor L3 and a second metallized polypropylene film capacitor C2, wherein the two differential mode inductors are connected in series before a L, N line rectification circuit at the input end, the positive electrode of the output end of the rectification circuit is connected with one end of the first metallized polypropylene film capacitor and one end of the I-shaped inductor, the other end of the I-shaped inductor is connected with the second metallized polypropylene film capacitor, and the other ends of the first metallized polypropylene film capacitor and the second metallized polypropylene film capacitor are connected with the negative electrode of the rectification circuit.
In this way, by providing only the differential mode inductance in the high power factor unit, the existing X-capacitor and common mode inductance are replaced, and the discharge resistor is not used, so that the loss in the resistor can be reduced. And the filter circuit formed by the two-stage metallized polypropylene film capacitor and the I-shaped inductor is used for replacing the electrolytic capacitor, so that the power factor value of the power supply is improved, the utilization rate of the power supply of the power grid is improved, meanwhile, the characteristic that the electrolytic capacitor is easy to dry and lose efficacy is avoided, and the service life of the product is prolonged. Therefore, the power factor and the efficiency of the power supply product can be obviously improved, and the tested power factor can reach more than 98%.
It should be noted that, the filter unit includes a capacitor CE3, a capacitor CE4, a capacitor CE5, a thermistor RT1, an inductor L4, a resistor R20 and a resistor R21, two ends of the resistor R20 are respectively electrically connected with two ends of the voltage conversion unit, the capacitor CE3, the capacitor CE4, the capacitor CE5 are sequentially connected with the resistor R20 in parallel, one end of the resistor RT1 is electrically connected with one end of the voltage conversion unit, and the other end of the thermistor RT1 outputs a voltage after passing through the inductor L4 and the resistor R21. Further, the electrolytic capacitor CE3, the capacitor CE4, the capacitor CE5, the inductor L4 and the resistor R21 form a ripple filtering circuit, and the resistor R21 is used as a pure resistive load, so that the ripple current is smaller. Specifically, since the nature of the LED lamp as a load is not the same as that of a pure resistor, a load mode of a little inductance is provided in the LED lamp, and in this embodiment, a linear pure resistor load is introduced, so that the effect of filtering ripple current is very good, and the output current ripple is smaller.
It should be noted that, the input rectifying unit includes anti-interference branch road, lightning protection branch road and rectification branch road, the input of anti-interference branch road is used for being connected with outside electric wire netting electricity, the output of anti-interference branch road with the one end electricity of lightning protection branch road is connected, the other end of lightning protection branch road with the input electricity of rectification branch road is connected, the output of rectification branch road with the input electricity of high power factor unit is connected. The anti-interference branch circuit is used for protecting a circuit and can also realize anti-EMI interference; the lightning protection branch is used for preventing lightning stroke and also plays a role in radiation conduction; the rectifying branch is used for rectifying an input current signal.
Specifically, the anti-interference branch circuit comprises a fuse F1, an inductor L2 and a piezoresistor V1, wherein a first end of the fuse F1 is used for being connected with a live wire of an external power grid, a second end of the fuse F1 is electrically connected with the first end of the piezoresistor V1 after passing through the inductor L1, one end of the inductor L2 is used for being electrically connected with a zero line of the external power grid, and the other end of the inductor L2 is electrically connected with a second end of the piezoresistor V1. The fuse F1 plays a role in overcurrent protection, and the piezoresistor V1 has a surge suppression function.
Specifically, the lightning protection branch circuit includes a capacitor CY2 and a capacitor CY3, one end of the capacitor CY2 is electrically connected with the second end of the varistor V1, the other end of the capacitor CY2 is grounded, the capacitor CY3 is electrically connected with the first end of the varistor V1, and the other end of the capacitor CY3 is grounded. It should be noted that, the capacitor CY2 and the capacitor CY3 are both safety capacitors, and mainly play roles in lightning strike resistance and radiation conduction, that is, radiation of the conduction power supply to external wireless waves.
Specifically, the rectifying branch circuit comprises a rectifying bridge, two input ends of the rectifying bridge are respectively and electrically connected with two ends of the piezoresistor V1, and an output end of the rectifying bridge is electrically connected with the high-power factor unit.
It should be noted that, the voltage conversion unit includes a transformer T1A and an RC filter branch, two input ends of the transformer T1A are electrically connected with two output ends of the high power factor unit, an output end of the transformer T1A is electrically connected with an input end of the RC filter branch, and an output end of the RC filter branch is electrically connected with the filter unit. Specifically, the RC filter branch includes a capacitor C8, a resistor R19, and a diode D6, where an anode of the diode D6 is electrically connected to the secondary output end of the transformer, a cathode of the diode D6 is electrically connected to the filter unit, one end of the capacitor C8 is electrically connected to the anode of the diode D6, and the other end of the capacitor C8 is electrically connected to the cathode of the diode D6 after passing through the resistor R19. The diode D6 is used for rectifying output, and the capacitor C8 and the resistor R19 realize filtering effect.
A linear voltage regulator circuit, comprising: the device comprises a voltage stabilizing input unit, a voltage stabilizing unit and a control chip, wherein the output end of the voltage stabilizing input unit is electrically connected with the input end of the voltage stabilizing unit, and the output end of the voltage stabilizing unit is electrically connected with the control chip. The operating voltage of the control chip is 10 to 26V, and the control chip U1 is a chip of model LD7831 of general technology company. The voltage stabilizing input unit is used for inputting voltage to the control chip; the voltage stabilizing unit stabilizes the input voltage in the working range of the control chip U1, so that the condition that the chip is broken down by the voltage is avoided.
Referring to fig. 2, the voltage stabilizing unit includes a resistor R3, a diode D2, a resistor R7, a triode Q2, and a voltage stabilizing diode ZD2, wherein a first end of the resistor R3 is electrically connected to an output end of the voltage stabilizing input unit, a second end of the resistor R3 is electrically connected to a collector of the triode Q2 after passing through the diode D2, a base of the triode Q2 is electrically connected to an anode of the diode D2, an emitter of the triode Q2 is electrically connected to the control chip, a cathode of the diode D2 is grounded, a first end of the resistor R7 is electrically connected to a collector of the triode Q2, and a second end of the resistor R7 is electrically connected to a base of the triode Q2.
When in operation, the device comprises: after rectification by the diode D1, the input voltage supplies power to the triode Q2 through the resistor R7, and at the moment, if the input voltage is smaller than the starting voltage of the zener diode ZD2, the zener diode ZD2 cannot start working, so that the input voltage passes through the resistor R7 and then is high level to the triode Q2, thereby the triode Q2 is conducted, and the input voltage can be directly input into a chip. When the input voltage is greater than the starting voltage of the zener diode ZD2, the zener diode ZD2 is turned on, so that the zener diode ZD2 works, the zener diode ZD2 clamps the voltage of the base electrode of the triode Q2, so that the voltage of the base electrode of the triode Q2 is the output voltage of the zener diode ZD2, so that the voltage of the output of the triode Q2 is the voltage of the zener diode ZD2, and the voltage input into the chip is the voltage of the zener diode ZD 2. Therefore, the control chip U1 is prevented from being broken down by voltage, the stability of the voltage-stabilized power supply circuit is improved, and the service life of the product is prolonged.
It should be noted that, the voltage stabilizing input unit includes a transformer T1, a resistor R4, and a resistor R5, where a first end of the resistor R4 is electrically connected to one end of the transformer T1, a first end of the resistor R5 is electrically connected to the other end of the transformer T1, and a second end of the resistor R4 is electrically connected to a second end of the resistor R5. The transformer T1 is a transformer T1B in the drawing.
It should be noted that, the linear voltage stabilizing circuit further includes a driving unit, one end of the driving unit is electrically connected with one end of the transformer T1, and the other end of the driving unit is electrically connected with the control chip. Specifically, the driving unit comprises a resistor R8, a resistor R9, a diode D2 and a MOS tube Q1, wherein the D electrode of the MOS tube Q1 is electrically connected with one end of the transformer T1, the S electrode of the MOS tube Q1 is grounded, the G electrode of the MOS tube Q1 is electrically connected with the control chip after passing through the diode D2 and the resistor R9, the first end of the resistor R8 is electrically connected with the G electrode of the MOS tube Q1, and the second end of the resistor R8 is electrically connected with the control chip. The resistor R8, the resistor R9 and the diode D2 drive the current limiting function of the MOS tube Q1, and control the on and off time of the MOS tube Q1.
It should be noted that, the linear voltage stabilizing circuit further includes a feedback unit, one end of the feedback unit is electrically connected with one end of the transformer T1, and the other end of the feedback unit is electrically connected with the control chip. Specifically, the feedback unit includes a resistor R12, a resistor R13, a resistor R14, a resistor R15, and a zener diode ZD1, one end of the resistor R13 is electrically connected with one end of the transformer T1, the other end of the resistor R13 is electrically connected with a cathode of the zener diode ZD1, an anode of the zener diode ZD1 is grounded, two ends of the resistor R14 are connected in parallel with two ends of the zener diode ZD1, the resistor R14 is further electrically connected with one end of the transformer T1, two ends of the resistor R15 are connected in parallel with two ends of the zener diode ZD1, one end of the resistor R12 is electrically connected with a cathode of the zener diode ZD1, and the other end of the resistor R12 is electrically connected with the control chip.
Further, the resistor R14 and the resistor R15 are used for detecting the current on the MOS tube, forming a voltage through the current, feeding the voltage back to the control chip, and controlling the current output by the MOS tube Q1 through the voltage by the control chip, so that the magnitude of the secondary output current can be controlled, the voltage stabilizing diode ZD1 is used for ensuring that the input voltage does not exceed the working voltage of the chip, preventing the chip from being broken down, and protecting the chip.
It should be noted that the voltage stabilizing unit further includes a capacitor CE1, one end of the capacitor CE1 is electrically connected to the cathode of the diode D2, and the other end of the capacitor CE1 is grounded. The voltage stabilizing unit further comprises a capacitor CE2, one end of the capacitor CE2 is electrically connected with the emitter of the triode Q2, and the other end of the capacitor CE2 is grounded. Thus, by providing the capacitor CE1 and the capacitor CE2, the function of storing energy can be achieved.
It should be noted that, the linear voltage stabilizing circuit further includes a temperature fuse TRS1, one end of the temperature fuse TRS1 is electrically connected to the emitter of the triode Q2, and the other end of the temperature fuse TRS1 is electrically connected to the VCC pin of the control chip. In this way, when the temperature is too high, the control chip U1 can be protected from damage.
It will be appreciated that, in order to be compatible with various LED lamps or other models, when the voltage range on the other models is not large, in one embodiment, the linear voltage stabilizing circuit further includes a resistor R6, where a first end of the resistor R6 is electrically connected to the cathode of the diode D1, and a second end of the resistor R6 is electrically connected to the VCC pin of the control chip U1. Therefore, when the connected LED lamp or other machine type does not need a large range of voltage, only the resistor R6 with the ohm size of 0 can be connected into the circuit, and then the capacitor CE1, the capacitor CE2, the resistor R7, the zener diode ZD2 and the triode Q2 are replaced, so that more electronic components can be saved, the cost of the circuit is reduced, and the popularization of products is facilitated.
It should be noted that, the regulated power supply system further includes a compensation circuit and an RCD filter circuit, one end of the compensation circuit is electrically connected with the output end of the high power factor unit, the other end of the compensation circuit is electrically connected with the control chip, one end of the RCD filter circuit is electrically connected with one end of the transformer T1A, and the other end of the RCD filter circuit is electrically connected with the output end of the high power factor unit.
The compensation circuit comprises a resistor R10 and a resistor R11, one end of the resistor R10 is electrically connected with the output end of the high-power factor unit, and the other end of the resistor R10 is electrically connected with a CS pin of the control chip; therefore, the resistor R10 and the resistor R11 are arranged, and meanwhile, the resistor R10 and the resistor R11 are connected with a CS pin of the chip and are used for controlling secondary output current of the transformer, and when high-voltage low-voltage output of the power supply is performed, the compensation function of current sampling is achieved.
The RCD filter circuit comprises a resistor R16, a resistor R17, a resistor R18, a diode D3, a diode D4, a diode D5 and a capacitor C3, wherein the output end of the high-power factor unit is electrically connected with one end of a transformer T1A after passing through the resistor R16, the resistor R17, the diode D3 and the diode D4, the output end of the high-power factor unit is also electrically connected with one end of the transformer T1A after passing through the capacitor C3, the resistor R18 and the diode D5, namely the output end of the inductor L3 is electrically connected with the D electrode of a MOS (metal oxide semiconductor) tube Q1 after passing through the resistor R16, the resistor R17, the diode D3 and the diode D4, and the output end of the inductor L3 is electrically connected with the D electrode of the MOS tube Q1 after passing through the capacitor C3, the resistor R18 and the diode D5. Therefore, the RCD filter circuit consisting of the resistor R16, the resistor R17, the resistor R18 and the resistor R19 transmits the redundant energy stored in the output end of the transformer T1A back to the input end of the transformer T1A, so that the recycling is realized, and the efficiency and the energy conservation are higher.
Compared with the prior art, the invention has the following advantages:
the invention relates to a linear voltage stabilizing circuit and a voltage stabilizing power supply system, which can meet the requirement of accessing a plurality of LED lamps and is compatible with a larger voltage range by arranging a voltage stabilizing input unit, a voltage stabilizing unit and a control chip, so that a control IC in the power supply system can work normally, the problem of burning out the control IC in the power supply system is avoided, the LED lamps can be used for normal illumination, and the reliability and the compatibility of the power supply system are improved.
The above embodiments represent only a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (8)
1. A linear voltage regulator circuit, comprising: the device comprises a voltage stabilizing input unit, a voltage stabilizing unit and a control chip, wherein the output end of the voltage stabilizing input unit is electrically connected with the input end of the voltage stabilizing unit, and the output end of the voltage stabilizing unit is electrically connected with the control chip;
the voltage stabilizing unit comprises a resistor R3, a diode D2, a resistor R7, a triode Q2 and a voltage stabilizing diode ZD2, wherein a first end of the resistor R3 is electrically connected with an output end of the voltage stabilizing input unit, a second end of the resistor R3 is electrically connected with a collector of the triode Q2 after passing through the diode D2, a base of the triode Q2 is electrically connected with an anode of the diode D2, an emitter of the triode Q2 is electrically connected with the control chip, a cathode of the diode D2 is grounded, a first end of the resistor R7 is electrically connected with a collector of the triode Q2, and a second end of the resistor R7 is electrically connected with a base of the triode Q2;
the voltage stabilizing unit further comprises a capacitor CE1, one end of the capacitor CE1 is electrically connected with the cathode of the diode D2, and the other end of the capacitor CE1 is grounded;
the voltage stabilizing unit further comprises a capacitor CE2, one end of the capacitor CE2 is electrically connected with the emitter of the triode Q2, and the other end of the capacitor CE2 is grounded.
2. The linear voltage stabilizing circuit according to claim 1, wherein the voltage stabilizing input unit comprises a transformer T1, a resistor R4 and a resistor R5, wherein a first end of the resistor R4 is electrically connected to one end of the transformer T1, a first end of the resistor R5 is electrically connected to the other end of the transformer T1, and a second end of the resistor R4 is electrically connected to a second end of the resistor R5.
3. The linear voltage stabilizing circuit according to claim 2, further comprising a driving unit, one end of the driving unit being electrically connected to one end of the transformer T1, and the other end of the driving unit being electrically connected to the control chip.
4. The linear voltage stabilizing circuit according to claim 3, wherein the driving unit comprises a resistor R8, a resistor R9, a diode D2 and a MOS transistor Q1, the D pole of the MOS transistor Q1 is electrically connected with one end of the transformer T1, the S pole of the MOS transistor Q1 is grounded, the G pole of the MOS transistor Q1 is electrically connected with the control chip after passing through the diode D2 and the resistor R9, the first end of the resistor R8 is electrically connected with the G pole of the MOS transistor Q1, and the second end of the resistor R8 is electrically connected with the control chip.
5. The linear voltage stabilizing circuit according to claim 2, further comprising a feedback unit, one end of the feedback unit being electrically connected to one end of the transformer T1, and the other end of the feedback unit being electrically connected to the control chip.
6. The linear voltage regulator circuit according to claim 5, wherein the feedback unit includes a resistor R12, a resistor R13, a resistor R14, a resistor R15, and a voltage regulator diode ZD1, one end of the resistor R13 is electrically connected to one end of the transformer T1, the other end of the resistor R13 is electrically connected to a cathode of the voltage regulator diode ZD1, an anode of the voltage regulator diode ZD1 is grounded, both ends of the resistor R14 are connected in parallel to both ends of the voltage regulator diode ZD1, and the resistor R14 is also electrically connected to one end of the transformer T1, both ends of the resistor R15 are connected in parallel to both ends of the voltage regulator diode ZD1, one end of the resistor R12 is electrically connected to a cathode of the voltage regulator diode ZD1, and the other end of the resistor R12 is electrically connected to the control chip.
7. The linear voltage stabilizing circuit according to claim 1, further comprising a temperature fuse TRS1, wherein one end of the temperature fuse TRS1 is electrically connected to the emitter of the transistor Q2, and the other end of the temperature fuse TRS1 is electrically connected to the VCC pin of the control chip.
8. A regulated power supply system comprising a linear regulator circuit as claimed in any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811162595.5A CN109246892B (en) | 2018-09-30 | 2018-09-30 | Linear voltage stabilizing circuit and voltage stabilizing power supply system |
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| CN201811162595.5A CN109246892B (en) | 2018-09-30 | 2018-09-30 | Linear voltage stabilizing circuit and voltage stabilizing power supply system |
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| CN109246892B true CN109246892B (en) | 2024-03-22 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953863A (en) * | 2015-06-04 | 2015-09-30 | 重庆华虹仪表有限公司 | Switching power circuit for power supply of three-phase electric energy meter |
| CN205160832U (en) * | 2015-11-28 | 2016-04-13 | 许富昌 | LED drive power supply of compatible traditional fluorescent tube ballast |
| CN106341922A (en) * | 2016-08-31 | 2017-01-18 | 深圳市英朗光电有限公司 | LED emergency lighting power source |
| WO2017128662A1 (en) * | 2016-01-29 | 2017-08-03 | 深圳市诚丰浩电子有限公司 | Led illumination-emergency integrated lamp and control system |
| CN209593816U (en) * | 2018-09-30 | 2019-11-05 | 惠州三华工业有限公司 | Linear voltage-stabilizing circuit and regulated power supply system |
-
2018
- 2018-09-30 CN CN201811162595.5A patent/CN109246892B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953863A (en) * | 2015-06-04 | 2015-09-30 | 重庆华虹仪表有限公司 | Switching power circuit for power supply of three-phase electric energy meter |
| CN205160832U (en) * | 2015-11-28 | 2016-04-13 | 许富昌 | LED drive power supply of compatible traditional fluorescent tube ballast |
| WO2017128662A1 (en) * | 2016-01-29 | 2017-08-03 | 深圳市诚丰浩电子有限公司 | Led illumination-emergency integrated lamp and control system |
| CN106341922A (en) * | 2016-08-31 | 2017-01-18 | 深圳市英朗光电有限公司 | LED emergency lighting power source |
| CN209593816U (en) * | 2018-09-30 | 2019-11-05 | 惠州三华工业有限公司 | Linear voltage-stabilizing circuit and regulated power supply system |
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