CN108023333A - Load short circuits protection power source circuit - Google Patents

Load short circuits protection power source circuit Download PDF

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Publication number
CN108023333A
CN108023333A CN201810096902.8A CN201810096902A CN108023333A CN 108023333 A CN108023333 A CN 108023333A CN 201810096902 A CN201810096902 A CN 201810096902A CN 108023333 A CN108023333 A CN 108023333A
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CN
China
Prior art keywords
resistance
diode
electrolytic capacitor
parallel
capacitance
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
Application number
CN201810096902.8A
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Chinese (zh)
Inventor
包翔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changzhou Si Tanbo Electronic Science And Technology Co Ltd
Original Assignee
Changzhou Si Tanbo Electronic Science And Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Changzhou Si Tanbo Electronic Science And Technology Co Ltd filed Critical Changzhou Si Tanbo Electronic Science And Technology Co Ltd
Priority to CN201810096902.8A priority Critical patent/CN108023333A/en
Publication of CN108023333A publication Critical patent/CN108023333A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/041Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature additionally responsive to excess current
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/042Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors

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  • Fire Alarms (AREA)

Abstract

The invention discloses a kind of load short circuits protection power source circuit, it includes firewire, zero curve, ground wire, ground connection, triode, 4th resistance is connected with the 5th resistance, 5th resistance and the 6th resistor coupled in parallel, 6th resistance is connected with the 7th resistance, 7th resistance and the 8th resistor coupled in parallel, 8th resistance is connected with the 9th resistance, 9th resistance and the tenth resistor coupled in parallel, tenth resistance is connected with the 11st resistance, 11st resistance is in parallel with the 3rd capacitance, 3rd capacitance and the 5th Diode series, 5th diode is connected with ground connection, the No.1 pin of transformer is connected with the first diode.The present invention passes through the stable signal of LC oscillating circuits output; rectification processing, which is carried out, using four diodes simplifies circuit structure; coordinate LC oscillating circuits and amplification electric signal using triode; improve the utilization rate of component; duplicate protection is carried out to circuit by thermistor and fusible link, improves the security of circuit.

Description

Load short circuits protection power source circuit
Technical field
The present invention relates to a kind of circuit, more particularly to a kind of load short circuits protection power source circuit.
Background technology
Current most of load short circuits protection power source circuit structure swinging of signal that is all more complicated, and exporting Fixed, short-circuit protection only has a fusible link, can not protect all electronic components, poor safety performance completely.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of load short circuits protection power source circuit, which is shaken by LC The signal of circuit output stabilization is swung, carrying out rectification processing using four diodes simplifies circuit structure, coordinates using triode LC oscillating circuits and amplification electric signal, improve the utilization rate of component, circuit are carried out by thermistor and fusible link double Protect again, improve the security of circuit.
The present invention is to solve above-mentioned technical problem by following technical proposals:A kind of load short circuits protection power source electricity Road, it is characterised in that it includes firewire, zero curve, ground wire, triode, inductance, fusible link, thermistor, magnet exciting coil, transformation Device, zener diode, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, 8th resistance, the 9th resistance, the tenth resistance, the 11st resistance, the 12nd resistance, the 13rd resistance, the 14th resistance, the 15th Resistance, the 16th resistance, the first capacitance, the second capacitance, the 3rd capacitance, the 4th capacitance, the 5th capacitance, the 6th capacitance, the one or two Pole pipe, the second diode, the 3rd diode, the 4th diode, the 5th diode, the 6th diode, the 7th diode, the eight or two Pole pipe, the 9th diode, the tenth diode, the 11st diode, the first electrolytic capacitor, the second electrolytic capacitor, the 3rd electrolysis electricity Appearance, the 4th electrolytic capacitor, the 5th electrolytic capacitor, the 6th electrolytic capacitor, the 7th electrolytic capacitor, firewire are connected with fusible link, zero curve It is connected with thermistor, ground wire is connected with the first capacitance, and fusible link is in parallel with thermistor, and the No.1 pin of magnet exciting coil is with melting Fracture of wire is connected, and No. three pins of magnet exciting coil are connected with thermistor, and No. two pins of magnet exciting coil are connected with the first diode, No. four pins of magnet exciting coil are connected with the second diode, the first diode and the 3rd Diode series, the second diode and Four Diode series, the first diode and the second diodes in parallel, first resistor are connected with second resistance, the first capacitance and second Capacitance is connected, and 3rd resistor is connected with the first capacitance, the first electrolytic capacitor and the 4th resistor coupled in parallel, the 4th resistance and the 5th resistance Series connection, the 5th resistance and the 6th resistor coupled in parallel, the 6th resistance are connected with the 7th resistance, the 7th resistance and the 8th resistor coupled in parallel, the Eight resistance are connected with the 9th resistance, and the 9th resistance and the tenth resistor coupled in parallel, the tenth resistance are connected with the 11st resistance, the 11st electricity , threeth capacitance and fiveth Diode series in parallel with the 3rd capacitance are hindered, the No.1 pin of transformer is connected with the first diode, becomes No. two pins of depressor are connected with the 5th diode, and No. four pins of transformer are connected with the 6th diode, No. five of transformer Pin is grounded, and No. six pins of transformer are connected with the 8th diode, and No. eight pins of transformer are connected with the 9th diode, the Eight diodes and the 9th diodes in parallel, the 9th diode and the tenth diodes in parallel, the tenth diode and the 11st diode Parallel connection, the 11st diode and the 14th resistor coupled in parallel, the 14th resistance are connected with the 5th capacitance, the 5th capacitance and the 15th electricity Resistance is in parallel, and the 12nd resistance is connected with the 4th capacitance, the 12nd resistance and the 13rd resistor coupled in parallel, the 13rd resistance and the eight or two Pole pipe is in parallel, and the 8th diode is connected with inductance, and the 4th electrolytic capacitor is connected with inductance, the 5th electrolytic capacitor and the 4th electrolysis electricity Hold parallel connection, the 6th electrolytic capacitor is in parallel with the 5th electrolytic capacitor, and the 7th electrolytic capacitor is in parallel with the 6th electrolytic capacitor, the six or two pole Pipe is connected with the collector of triode, and the collector of the 7th diode and triode is connected, the second electrolytic capacitor and the seven or two pole Pipe is connected, and the 16th resistance is connected with the base stage of triode, and zener diode is connected with the base stage of triode, the transmitting of triode Pole is connected with 3rd resistor, and the 3rd electrolytic capacitor is connected with the emitter of triode, and the 6th capacitance is in parallel with the 3rd electrolytic capacitor, Inductance, zener diode, the 5th resistance, the 7th resistance, the first electrolytic capacitor, the second electrolytic capacitor, the 3rd electrolytic capacitor, the 4th Electrolytic capacitor, the 5th electrolytic capacitor, the 6th electrolytic capacitor, the 7th electrolytic capacitor are all grounded.
Preferably, cathode one end of the zener diode tube body is planar shaped, and anode one end is semi circular surface shape.
Preferably, the triode is NPN type triode.
The positive effect of the present invention is:Load short circuits protection power source circuit passes through LC oscillating circuits output stabilization Signal, carries out rectification processing using four diodes and simplifies circuit structure, coordinate LC oscillating circuits and amplification using triode Electric signal, improves the utilization rate of component, carries out duplicate protection to circuit by thermistor and fusible link, improves circuit Security.
Brief description of the drawings
Fig. 1 is the circuit diagram of the present invention.
Embodiment
Present pre-ferred embodiments are provided below in conjunction with the accompanying drawings, with the technical solution that the present invention will be described in detail.
As shown in Figure 1, load short circuits protection power source circuit of the present invention include firewire L, zero curve N, ground wire FG, triode Q1, Inductance L, fusible link FS, thermistor RTH, magnet exciting coil B1, transformer B2, zener diode ZD1, first resistor R1, second Resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th Resistance R9, the tenth resistance R10, the 11st resistance R11, the 12nd resistance R12, the 13rd resistance R13, the 14th resistance R14, 15 resistance R15, the 16th resistance R16, the first capacitance C1, the second capacitance C2, the 3rd capacitance C3, the 4th capacitance C4, the 5th electricity Hold C5, the 6th capacitance C6, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the five or two pole Pipe D5, the 6th diode D6, the 7th diode D7, the 8th diode D8, the 9th diode D9, the tenth diode D10, the 11st Diode D11, the first electrolytic capacitor CJ1, the second electrolytic capacitor CJ2, the 3rd electrolytic capacitor CJ3, the 4th electrolytic capacitor CJ4, Five electrolytic capacitor CJ5, the 6th electrolytic capacitor CJ6, the 7th electrolytic capacitor CJ7, firewire L are connected with fusible link FS, zero curve N and temperature-sensitive Resistance RTH is connected, and ground wire FG is connected with the first capacitance C1, and fusible link FS is in parallel with thermistor RTH, the No.1 of magnet exciting coil B1 Pin is connected with fusible link FS, and No. three pins of magnet exciting coil B1 are connected with thermistor RTH, No. two pins of magnet exciting coil B1 It is connected with the first diode D1, No. four pins of magnet exciting coil B1 are connected with the second diode D2, the first diode D1 and the 3rd Diode D3 connects, and the second diode D2 connects with the 4th diode D4, and the first diode D1 is in parallel with the second diode D2, the One resistance R1 connects with second resistance R2, and the first capacitance C1 connects with the second capacitance C2, and 3rd resistor R3 and the first capacitance C1 go here and there Connection, the first electrolytic capacitor CJ1 is in parallel with the 4th resistance R4, and the 4th resistance R4 connects with the 5th resistance R5, the 5th resistance R5 and the Six resistance R6 are in parallel, and the 6th resistance R6 connects with the 7th resistance R7, and the 7th resistance R7 is in parallel with the 8th resistance R8, the 8th resistance R8 Connecting with the 9th resistance R9, the 9th resistance R9 is in parallel with the tenth resistance R10, and the tenth resistance R10 connects with the 11st resistance R11, 11st resistance R11 is in parallel with the 3rd capacitance C3, and the 3rd capacitance C3 connects with the 5th diode D5, the No.1 pin of transformer B2 Be connected with the first diode D1, No. two pins of transformer B2 are connected with the 5th diode D5, No. four pins of transformer B2 with 6th diode D6 is connected, and No. five pins ground connection of transformer B2, No. six pins of transformer B2 are connected with the 8th diode D8, No. eight pins of transformer B2 are connected with the 9th diode D9, and the 8th diode D8 is in parallel with the 9th diode D9, the 9th 2 pole Pipe D9 is in parallel with the tenth diode D10, and the tenth diode D10 is in parallel with the 11st diode D11, the 11st diode D11 with 14th resistance R14 is in parallel, and the 14th resistance R14 connects with the 5th capacitance C5, and the 5th capacitance C5 and the 15th resistance R15 are simultaneously Connection, the 12nd resistance R12 connect with the 4th capacitance C4, and the 12nd resistance R12 is in parallel with the 13rd resistance R13, the 13rd resistance R13 is in parallel with the 8th diode D8, and the 8th diode D8 connects with inductance L, and the 4th electrolytic capacitor CJ4 connects with inductance L, and the 5th Electrolytic capacitor CJ5 is in parallel with the 4th electrolytic capacitor CJ4, and the 6th electrolytic capacitor CJ6 is in parallel with the 5th electrolytic capacitor CJ5, the 7th electricity Solution capacitance CJ7 is in parallel with the 6th electrolytic capacitor CJ6, and the 6th diode D6 connects with the collector of triode Q1, the 7th diode The collector of D7 and triode Q1 are connected, and the second electrolytic capacitor CJ2 connects with the 7th diode D7, the 16th resistance R16 and three The base stage of pole pipe Q1 is connected, and zener diode ZD1 is connected with the base stage of triode Q1, the emitter and 3rd resistor of triode Q1 R3 is connected, and the 3rd electrolytic capacitor CJ3 is connected with the emitter of triode Q1, and the 6th capacitance C6 is in parallel with the 3rd electrolytic capacitor CJ3, Inductance L, zener diode ZD1, the 5th resistance R5, the 7th resistance R7, the first electrolytic capacitor CJ1, the second electrolytic capacitor CJ2, Three electrolytic capacitor CJ3, the 4th electrolytic capacitor CJ4, the 5th electrolytic capacitor CJ5, the 6th electrolytic capacitor CJ6, the 7th electrolytic capacitor CJ7 All it is grounded.
The operation principle of the present invention is as follows:Short circuit or mistake can occur for the fusible link in load short circuits protection power source circuit Carry the fusing when failure and protect electrical equipment to cut off circuit, thermistor can change the big of resistance value according to temperature level Small, when circuit overheats, thermistor can increase resistance value to reduce electric current, protect the electrical equipment in circuit, first resistor and the Two resistance play the role of partial pressure, and excitation is exactly the meaning that excitation produces in magnet exciting coil, by the electric current of change in coil, Just there is the magnetic line of force along hub of a spool by the way that current changing rate is bigger, and the magnetic line of force is also more, until saturation, turn-off current, the magnetic line of force Disappear, the first capacitance and the second capacitance are acted on separated by direct communication, and three-phase electricity warp only can be left alternating current, the one or two pole later Pipe, the second diode, the 3rd diode, the 4th diode have the function that rectification, will be upper by the unilateral conduction of diode The alternating current of lower floating is converted to unidirectional direct current, and the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance can will be whole Unidirectional direct current after stream is filtered processing, by the waveform stabilization of unidirectional direct current in the range of a very little, the Eight resistance, the 9th resistance, the tenth resistance, the 11st resistance, the 3rd capacitance constitute an oscillating circuit, can produce sine Ripple, reduces the frequency of vibration by increasing the resistance value of resistance, stablizes the waveform of sine wave, when logical in the primary coil of transformer When having alternating current, exchange flux is just produced in iron core, makes to induce voltage in secondary coil(Or electric current).Transformer is by iron core Formed with coil, coil has two or more windings, wherein connect the winding of power supply primary coil, remaining winding Secondary coil, in generator, either coil movement by magnetic field or Movement in Magnetic Field by fixed coil, can be in coil Induced potential, this two kinds of situations, the value of magnetic flux is constant, but has variation with the magnetic flux quantity of coil intersecting chain, this is mutual inductance The principle answered, transformer are exactly inductance, the 4th electrolytic capacitor, the come voltage of transformation, electric current and impedance using undesirable mutual electromagnetic inductance effect Five electrolytic capacitors, the 6th electrolytic capacitor, the 7th electrolytic capacitor form LC oscillating circuits, can produce high_frequency sine wave signal, LC Oscillating circuit has used capacitance with the energy storage characteristic of inductance, allows two kinds of energy of electromagnetism alternately to convert, that is to say, that electric energy is with magnetic energy As soon as there will be a maximin, also there is vibration, but this is ideal situation, actually all electronic components can all have Loss, otherwise energy in capacitance with being depleted between inductance during mutual inversion of phases, or leak out outside, energy can constantly Reduce, so actual LC oscillating circuits are required for an amplifier element, are exactly triode, using this triode, pass through Various signal feedback methods cause the oscillator signal that this is constantly consumed by feedback amplify so that one amplitude of final output with The more stable signal of frequency, triode is Current amplifier device, and in addition to it can coordinate LC oscillating circuits, it can also be Faint electric signal becomes the signal of some strength.
Cathode one end of zener diode ZD1 tube bodies is planar shaped, and anode one end is semi circular surface shape, for overvoltage protection.
Triode Q1 is NPN type triode, and collector current is to flow to emitter from collector, and base current is from base stage Flow into.
In conclusion load short circuits protection power source circuit of the present invention is utilized by the stable signal of LC oscillating circuits output Four diodes carry out rectification processing and simplify circuit structure, coordinate LC oscillating circuits and amplification electric signal using triode, carry The high utilization rate of component, carries out duplicate protection to circuit by thermistor and fusible link, improves the security of circuit.
Particular embodiments described above, to the present invention solution technical problem, technical solution and beneficial effect carried out into One step describes in detail, it should be understood that the foregoing is merely the specific embodiment of the present invention, is not limited to this hair Bright, within the spirit and principles of the invention, any modification, equivalent substitution, improvement and etc. done, should be included in the present invention Protection domain within.

Claims (3)

1. a kind of load short circuits protection power source circuit, it is characterised in that it includes firewire, zero curve, ground wire, triode, inductance, molten Fracture of wire, thermistor, magnet exciting coil, transformer, zener diode, first resistor, second resistance, 3rd resistor, the 4th resistance, 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11st resistance, the 12nd resistance, 13rd resistance, the 14th resistance, the 15th resistance, the 16th resistance, the first capacitance, the second capacitance, the 3rd capacitance, the 4th electricity Appearance, the 5th capacitance, the 6th capacitance, the first diode, the second diode, the 3rd diode, the 4th diode, the 5th diode, 6th diode, the 7th diode, the 8th diode, the 9th diode, the tenth diode, the 11st diode, the first electrolysis Capacitance, the second electrolytic capacitor, the 3rd electrolytic capacitor, the 4th electrolytic capacitor, the 5th electrolytic capacitor, the 6th electrolytic capacitor, the 7th electricity Capacitance is solved, firewire is connected with fusible link, and zero curve is connected with thermistor, and ground wire is connected with the first capacitance, fusible link and temperature-sensitive electricity Resistance is in parallel, and the No.1 pin of magnet exciting coil is connected with fusible link, and No. three pins of magnet exciting coil are connected with thermistor, excitation wire Circle No. two pins be connected with the first diode, No. four pins of magnet exciting coil are connected with the second diode, the first diode and 3rd Diode series, the second diode and the 4th Diode series, the first diode and the second diodes in parallel, first resistor Connect with second resistance, the first capacitance is connected with the second capacitance, and 3rd resistor is connected with the first capacitance, the first electrolytic capacitor and Four resistor coupled in parallel, the 4th resistance are connected with the 5th resistance, the 5th resistance and the 6th resistor coupled in parallel, the 6th resistance and the 7th resistance string Connection, the 7th resistance and the 8th resistor coupled in parallel, the 8th resistance are connected with the 9th resistance, the 9th resistance and the tenth resistor coupled in parallel, and the tenth Resistance is connected with the 11st resistance, and the 11st resistance is in parallel with the 3rd capacitance, the 3rd capacitance and the 5th Diode series, transformer No.1 pin be connected with the first diode, No. two pins of transformer are connected with the 5th diode, No. four pins of transformer It is connected with the 6th diode, No. five pins ground connection of transformer, No. six pins of transformer are connected with the 8th diode, transformer No. eight pins be connected with the 9th diode, the 8th diode and the 9th diodes in parallel, the 9th diode and the tenth diode Parallel connection, the tenth diode and the 11st diodes in parallel, the 11st diode and the 14th resistor coupled in parallel, the 14th resistance and Five capacitances are connected, and the 5th capacitance and the 15th resistor coupled in parallel, the 12nd resistance are connected with the 4th capacitance, the 12nd resistance and the tenth Three resistor coupled in parallel, the 13rd resistance and the 8th diodes in parallel, the 8th diode are connected with inductance, the 4th electrolytic capacitor and inductance Series connection, the 5th electrolytic capacitor is in parallel with the 4th electrolytic capacitor, and the 6th electrolytic capacitor is in parallel with the 5th electrolytic capacitor, the 7th electrolysis electricity Appearance is in parallel with the 6th electrolytic capacitor, and the 6th diode is connected with the collector of triode, the current collection of the 7th diode and triode Pole is connected, and the second electrolytic capacitor and the 7th Diode series, the 16th resistance are connected with the base stage of triode, zener diode with The base stage of triode is connected, and the emitter of triode is connected with 3rd resistor, the emitter phase of the 3rd electrolytic capacitor and triode Even, the 6th capacitance is in parallel with the 3rd electrolytic capacitor, inductance, zener diode, the 5th resistance, the 7th resistance, the first electrolytic capacitor, Second electrolytic capacitor, the 3rd electrolytic capacitor, the 4th electrolytic capacitor, the 5th electrolytic capacitor, the 6th electrolytic capacitor, the 7th electrolytic capacitor All it is grounded.
2. load short circuits protection power source circuit as claimed in claim 1, it is characterised in that the zener diode tube body is just Pole one end is planar shaped, and anode one end is semi circular surface shape.
3. load short circuits protection power source circuit as claimed in claim 1, it is characterised in that the triode is three pole of NPN type Pipe.
CN201810096902.8A 2018-01-31 2018-01-31 Load short circuits protection power source circuit Pending CN108023333A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810096902.8A CN108023333A (en) 2018-01-31 2018-01-31 Load short circuits protection power source circuit

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Application Number Priority Date Filing Date Title
CN201810096902.8A CN108023333A (en) 2018-01-31 2018-01-31 Load short circuits protection power source circuit

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Publication Number Publication Date
CN108023333A true CN108023333A (en) 2018-05-11

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CN201810096902.8A Pending CN108023333A (en) 2018-01-31 2018-01-31 Load short circuits protection power source circuit

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103890678A (en) * 2011-06-22 2014-06-25 深圳市矽烁科技有限公司 Electric blanket and low-voltage thermostatic control device thereof
CN104902627A (en) * 2015-07-14 2015-09-09 常州斯坦博电子科技有限公司 LED power supply circuit
CN106787853A (en) * 2017-02-17 2017-05-31 合肥惠科金扬科技有限公司 A kind of inverse-excitation type switch power-supply
CN206595908U (en) * 2017-02-17 2017-10-27 合肥惠科金扬科技有限公司 A kind of inverse-excitation type switch power-supply
JP2017212197A (en) * 2016-05-18 2017-11-30 株式会社エスアイエレクトロニクス LED lighting device and LED unit
CN207853448U (en) * 2018-01-31 2018-09-11 常州斯坦博电子科技有限公司 Load short circuits protection power source circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103890678A (en) * 2011-06-22 2014-06-25 深圳市矽烁科技有限公司 Electric blanket and low-voltage thermostatic control device thereof
CN104902627A (en) * 2015-07-14 2015-09-09 常州斯坦博电子科技有限公司 LED power supply circuit
JP2017212197A (en) * 2016-05-18 2017-11-30 株式会社エスアイエレクトロニクス LED lighting device and LED unit
CN106787853A (en) * 2017-02-17 2017-05-31 合肥惠科金扬科技有限公司 A kind of inverse-excitation type switch power-supply
CN206595908U (en) * 2017-02-17 2017-10-27 合肥惠科金扬科技有限公司 A kind of inverse-excitation type switch power-supply
CN207853448U (en) * 2018-01-31 2018-09-11 常州斯坦博电子科技有限公司 Load short circuits protection power source circuit

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