CN106612067A - Overcharging preventive rapid charging circuit - Google Patents
Overcharging preventive rapid charging circuit Download PDFInfo
- Publication number
- CN106612067A CN106612067A CN201710011002.4A CN201710011002A CN106612067A CN 106612067 A CN106612067 A CN 106612067A CN 201710011002 A CN201710011002 A CN 201710011002A CN 106612067 A CN106612067 A CN 106612067A
- Authority
- CN
- China
- Prior art keywords
- resistance
- electric capacity
- electrically connected
- semiconductor
- oxide
- 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
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an overcharging preventive rapid charging circuit which comprises a rectifier tube DS81, resistors RS81, RS82 and RS83, a capacitor CS81 and an MOS tube QS81, the cathode of the rectifier tube DS81 is electrically connected with a first end of a primary coil of a transformer, a first end of the resistor RS81 is electrically connected with a first end of a capacitor C41 and a first end of the resistor RS82, a second end of the resistor RS81 is electrically connected with a drain electrode of the MOS tube QS81, a second end of the resistor RS82 is electrically connected with a grid electrode of the MOS tube QS81, a first end of the capacitor CS81 and a second end of the resistor RS83, a first end of the resistor RS83 is connected to the anode of the rectifier tube DS81, and a source electrode of the MOS tube QS81 is electrically connected with a second end of the capacitor C41 and a second end of the capacitor CS81. Thus, the discharging circuit is in a cut-off state when a power supply works, almost no loss is generated, charging is carried out when the power supply does not work, and overcharging when the circuit is started again is prevented.
Description
Technical field
Circuit of the present invention is related in D/C power, LED driver application.D/C power or LED driver are predominantly prevented in perseverance
Under pressure, constant current conditions, high-speed switch or hot plug can produce voltage, current over pulse when loading.
Background technology
As country widelys popularize to energy-conserving product, D/C power and LED driver are increasing in the market demand, while
Safety to matched load and equipment is put forward higher requirement.Particularly in LED illumination application, client is in switching on and shutting down pair
The impression of light requires more and more higher.
Under constant pressure, constant current conditions, high-speed switch or hot plug can produce voltage, current over pulse to power supply when loading, and impact
Or breaking load and equipment.At present, typically outfan is connected to using pure resistance discharge type, as shown in Fig. 2 putting to output capacitance
Electricity, is not in the purpose of overshoot when being again started up so as to reach.Because resistance is constantly in work, institute is by this way
There is overall efficiency low, the major defect such as resistance heating.
The content of the invention
The purpose of the present invention is to overcome current power supply using overshooting problem during pure resistance discharge type solution high-speed switch,
A kind of resistance catabiotic technical problem always during power work, there is provided anti-overshoot quick discharging circuit, it returns electric discharge
Road is in cut-off state in power work, is nearly free from loss, discharges when power supply does not work, mistake when preventing from being again started up
Punching.
In order to solve the above problems, the present invention is employed the following technical solutions and is achieved：
A kind of anti-overshoot quick discharging circuit of the present invention, for output circuit, the output circuit is by the secondary of a transformator
Level coil obtains the input of power supply, and the output circuit includes half-wave rectifying circuit and electric capacity C41, the secondary wire of transformator
Circle first end is electrically connected with the input of half-wave rectifying circuit, and outfan and the electric capacity C41 first ends of half-wave rectifying circuit are electrically connected
Connect, the ends of electric capacity C41 second electrically connect with the end of secondary coil second of transformator, it is characterised in that：The quick discharging circuit bag
Include rectifier tube DS81, resistance RS81, resistance RS82, resistance RS83, electric capacity CS81 and metal-oxide-semiconductor QS81, rectifier tube DS81 negative electrodes with
The secondary coil first end electrical connection of transformator, resistance RS81 first ends are electrically connected with electric capacity C41 first ends, resistance RS82 first ends
Connect, the ends of resistance RS81 second and metal-oxide-semiconductor QS81 drain electrode electrically connect, the ends of resistance RS82 second and metal-oxide-semiconductor QS81 grids, electric capacity CS81
First end, the electrical connection of the ends of resistance RS83 second, resistance RS83 first ends are electrically connected with rectifier tube DS81 anodes, metal-oxide-semiconductor QS81 sources
Pole electrically connects with the ends of electric capacity C41 second, the ends of electric capacity CS81 second.
In the technical program, after power supply is opened, the secondary coil output high-frequency alternating current of transformator, through rectifier tube
DS81, resistance RS83, electric capacity CS81 form loop, and the grid that certain negative pressure is applied to metal-oxide-semiconductor QS81 is produced on electric capacity CS81, make
Metal-oxide-semiconductor QS81 is in cut-off state.Now, resistance RS81 no powers, do not produce the resistance of loss, resistance RS82 and resistance RS83
It is very big, very little is lost, the value relatable between resistance RS81, resistance RS82, resistance RS83 can be：RS82 ＞ 100*RS83,
RS83 ＞ 30*RS81.
After power remove, the secondary coil of transformator does not export electric energy, and the voltage Jing resistance RS82 on electric capacity C41 are to electric capacity
CS81 charges, while the secondary coil through resistance RS83, rectifier tube DS81, transformator discharges.Electric capacity CS81 is charged, voltage
The voltage that metal-oxide-semiconductor QS81 conductings are required is rapidly achieved, metal-oxide-semiconductor QS81 is turned on.Now, electric capacity CS81, resistance RS81, metal-oxide-semiconductor
QS81 forms repid discharge loop, quickly voltage on C41 is dropped to into reasonable level, and electric capacity C41 is electrochemical capacitor.
When power supply is quickly opened again, the negative pressure produced on electric capacity CS81 makes again metal-oxide-semiconductor QS81 in cut-off state,
The repid discharge loop that electric capacity CS81, resistance RS81, metal-oxide-semiconductor QS81 are constituted quits work, front several weeks that power supply is opened again
The peak current that phase is formed on the secondary coil of transformator, Jing half-wave rectifying circuits charge to electric capacity C41, due to electric capacity C41
Upper voltage has been lowered to reasonable current potential before opening for the second time, and spike rechargeable energy is not result in that the voltage on electric capacity C41 is unexpected
Lifting is more than normal voltage value, but slow charging lifting voltage, so as to solve mistake of the output more than normal value during high-speed switch
Rush phenomenon.
Preferably, the anti-overshoot quick discharging circuit of described one kind also includes stabilivolt ZS81, stabilivolt ZS81 negative electrodes with
The ends of resistance RS82 second, metal-oxide-semiconductor QS81 grids, the electrical connection of electric capacity CS81 first ends, stabilivolt ZS81 anodes and resistance RS83 the
Two ends electrically connect.
Preferably, the anti-overshoot quick discharging circuit of described one kind also includes rectifier tube DS82, rectifier tube DS82 negative electrodes with
Electric capacity CS81 first ends are electrically connected, and rectifier tube DS82 anodes are electrically connected with the ends of electric capacity CS81 second.Electric capacity CS81 two ends peaked minimum
Value is rectified pipe DS82 positive clampings in -1V or so, predominantly protects metal-oxide-semiconductor QS81 without damage.
Preferably, the resistance RS81 is 100-500 Ω, the resistance RS82 is 1-5M Ω, and the resistance RS83 is
5-30KΩ。
Preferably, the half-wave rectifying circuit includes the diode D43 of two parallel connections.
Preferably, the electric capacity C41 is electrochemical capacitor.
The invention has the beneficial effects as follows：Make discharge loop in power work in cut-off state, be nearly free from loss,
Discharge when power supply does not work, overshoot when preventing from being again started up.
Description of the drawings
Fig. 1 is the circuit theory diagrams of the present invention；
Fig. 2 is the circuit theory diagrams of existing anti-overshoot quick discharging circuit；
Fig. 3 is the circuit theory diagrams that the present invention is applied to driving power supply.
In figure：1st, transformator, 2, half-wave rectifying circuit.
Specific embodiment
Below by embodiment, and accompanying drawing is combined, technical scheme is described in further detail.
Embodiment：A kind of anti-overshoot quick discharging circuit of the present embodiment, as shown in figure 1, it is used for output circuit, it is described defeated
Go out the input that circuit obtains power supply by the secondary coil of a transformator 1, output circuit includes half-wave rectifying circuit 2 and electricity
Hold C41, the secondary coil first end of transformator 1 electrically connects with the input of half-wave rectifying circuit 2, half-wave rectifying circuit 2 it is defeated
Go out end to electrically connect with electric capacity C41 first ends, the ends of electric capacity C41 second electrically connect with the end of secondary coil second of transformator 1, quickly put
Circuit includes rectifier tube DS81, resistance RS81, resistance RS82, resistance RS83, electric capacity CS81, metal-oxide-semiconductor QS81, stabilivolt ZS81
With rectifier tube DS82, rectifier tube DS81 negative electrodes electrically connect with the secondary coil first end of transformator 1, resistance RS81 first ends and electricity
Hold C41 first ends, the electrical connection of resistance RS82 first ends, the ends of resistance RS81 second electrically connect with metal-oxide-semiconductor QS81 drain electrodes, resistance RS82
Second end electrically connects with metal-oxide-semiconductor QS81 grids, electric capacity CS81 first ends, stabilivolt ZS81 negative electrodes, rectifier tube DS82 negative electrodes, voltage stabilizing
Pipe ZS81 anodes are electrically connected with the ends of resistance RS83 second, and resistance RS83 first ends are electrically connected with rectifier tube DS81 anodes, metal-oxide-semiconductor
QS81 source electrodes are electrically connected with the ends of electric capacity C41 second, the ends of electric capacity CS81 second, rectifier tube DS82 anodes.
Half-wave rectifying circuit 4 includes the diode D43 of two parallel connections.Electric capacity C41 be electrochemical capacitor, electric capacity C41 first ends
For positive pole, the ends of electric capacity C41 second are negative pole.It is that 2M Ω, resistance RS83 are 10K Ω that resistance RS81 is 300 Ω, resistance RS82.
After power supply is opened, the secondary coil of transformator output high-frequency alternating current, through rectifier tube DS81, stabilivolt ZS81,
Resistance RS83, electric capacity CS81 form loop, and the grid that certain negative pressure is applied to metal-oxide-semiconductor QS81 is produced on electric capacity CS81, make metal-oxide-semiconductor
QS81 is in cut-off state.Now, resistance RS81 no powers, the resistance for not producing loss, resistance RS82 and resistance RS83 is very big,
Loss very little.
After power remove, the secondary coil of transformator does not export electric energy, and the voltage Jing resistance RS82 on electric capacity C41 are to electric capacity
CS81 charges, while the secondary coil through stabilivolt ZS81, resistance RS83, rectifier tube DS81, transformator discharges.Electric capacity CS81
Upper peak forward voltage depends primarily on the voltage stabilizing value of stabilivolt ZS81, and electric capacity CS81 is charged, and voltage is rapidly achieved metal-oxide-semiconductor
The voltage that QS81 conductings are required, turns on metal-oxide-semiconductor QS81.Now, electric capacity CS81, resistance RS81, metal-oxide-semiconductor QS81 are formed and quickly put
Electrical circuit, quickly drops to reasonable level by voltage on C41.Adjust the big I of resistance RS81 quickly will by the time of design requirement
The upper voltages of C41 drop to reasonable level.
When power supply is quickly opened again, the negative pressure produced on electric capacity CS81 makes again metal-oxide-semiconductor QS81 in cut-off state,
The repid discharge loop that electric capacity CS81, resistance RS81, metal-oxide-semiconductor QS81 are constituted quits work, electric capacity CS81 two ends negative pressure peak quilt
Rectifier tube DS82 positive clampings predominantly protect metal-oxide-semiconductor QS81 without damage in -1V or so.It is front several that power supply is opened again
The peak current that cycle is formed on the secondary coil of transformator, Jing half-wave rectifying circuits charge to electric capacity C41, due to electric capacity
The upper voltages of C41 have been lowered to reasonable current potential before opening for the second time, and spike rechargeable energy is not result in that the voltage on electric capacity C41 is dashed forward
So lifting is more than normal voltage value, but slow charging lifting voltage, exceed normal value so as to solve output during high-speed switch
Overshoot phenomenon.Exactly be not in " backflash " phenomenon for LED load.
The present embodiment is applied to the circuit theory diagrams of driving power supply, as shown in figure 3, after driving power supply is opened, AC exchanges
Voltage forms the DC voltage of positive envelope Jing after insurance resistance R11, common mode inductance L12, rectifier bridge B rectifications, and by metal-oxide-semiconductor
Control chip US31 power pins VDD are quickly charged to startup running voltage point by Q62, and control chip US31 starts detection simultaneously
Work.Control chip US31 drives metal-oxide-semiconductor Q41 alternately to open cut-off work by resistance RS35A.The primary coil of transformator
L41A energy storage, and electric energy is delivered to by output by secondary coil L41C releases.High-frequency ac voltage is Jing after diode D43 rectifications
Charge to electric capacity C41, electric capacity C41 is electrochemical capacitor, capacity is very big, form galvanic current pressure, powering load completes AC
Turn the whole process of DC.
Claims (6)
1. a kind of anti-overshoot quick discharging circuit, for output circuit, the output circuit passes through a transformator（1）Secondary wire
Circle obtains the input of power supply, and the output circuit includes half-wave rectifying circuit（2）With electric capacity C41, transformator（1）Secondary
Coil first end and half-wave rectifying circuit（2）Input electrical connection, half-wave rectifying circuit（2）Outfan and electric capacity C41 the
One end electrical connection, the ends of electric capacity C41 second and transformator（1）The end of secondary coil second electrical connection, it is characterised in that：It is described quick
Discharge circuit includes rectifier tube DS81, resistance RS81, resistance RS82, resistance RS83, electric capacity CS81 and metal-oxide-semiconductor QS81, rectifier tube
DS81 negative electrodes and transformator（1）The electrical connection of secondary coil first end, resistance RS81 first ends and electric capacity C41 first ends, resistance
RS82 first ends are electrically connected, and the ends of resistance RS81 second and metal-oxide-semiconductor QS81 drain and electrically connect, the ends of resistance RS82 second and metal-oxide-semiconductor
QS81 grids, electric capacity CS81 first ends, the electrical connection of the ends of resistance RS83 second, resistance RS83 first ends and rectifier tube DS81 anodes electricity
Connection, metal-oxide-semiconductor QS81 source electrodes are electrically connected with the ends of electric capacity C41 second, the ends of electric capacity CS81 second.
2. a kind of anti-overshoot quick discharging circuit according to claim 1, it is characterised in that：Also include stabilivolt ZS81,
Stabilivolt ZS81 negative electrodes are electrically connected with the ends of resistance RS82 second, metal-oxide-semiconductor QS81 grids, electric capacity CS81 first ends, stabilivolt ZS81
Anode is electrically connected with the ends of resistance RS83 second.
3. a kind of anti-overshoot quick discharging circuit according to claim 1, it is characterised in that：Also include rectifier tube DS82,
Rectifier tube DS82 negative electrodes are electrically connected with electric capacity CS81 first ends, and rectifier tube DS82 anodes are electrically connected with the ends of electric capacity CS81 second.
4. a kind of anti-overshoot quick discharging circuit according to claim 1 or 2 or 3, it is characterised in that：The resistance RS81
For 100-500 Ω, the resistance RS82 is 1-5M Ω, and the resistance RS83 is 5-30K Ω.
5. a kind of anti-overshoot quick discharging circuit according to claim 1 or 2 or 3, it is characterised in that：The halfwave rectifier
Circuit（2）Including the diode D43 of two parallel connections.
6. a kind of anti-overshoot quick discharging circuit according to claim 1 or 2 or 3, it is characterised in that：The electric capacity C41
For electrochemical capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710011002.4A CN106612067A (en) | 2017-01-06 | 2017-01-06 | Overcharging preventive rapid charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710011002.4A CN106612067A (en) | 2017-01-06 | 2017-01-06 | Overcharging preventive rapid charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106612067A true CN106612067A (en) | 2017-05-03 |
Family
ID=58636826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710011002.4A Pending CN106612067A (en) | 2017-01-06 | 2017-01-06 | Overcharging preventive rapid charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106612067A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107623430A (en) * | 2017-09-07 | 2018-01-23 | 浙江凯耀照明股份有限公司 | Anti- overshoot circuit with the damping of wide output area |
| CN113422505A (en) * | 2021-07-08 | 2021-09-21 | 上海芯龙半导体技术股份有限公司南京分公司 | Voltage overshoot protection circuit, switching power supply chip and switching power supply system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1601079A2 (en) * | 2004-05-26 | 2005-11-30 | Delphi Technologies, Inc. | Dual-mode bus discharging circuit |
| CN202309501U (en) * | 2011-10-18 | 2012-07-04 | 康佳集团股份有限公司 | Circuit for restraining overshoot output by switch power supply |
| CN102647079A (en) * | 2011-02-16 | 2012-08-22 | 佳能株式会社 | Discharging circuit and power supply |
| CN202679230U (en) * | 2012-05-17 | 2013-01-16 | 安徽华东光电技术研究所 | An anti-overshoot slow starting protection circuit with reference output |
| CN103683903A (en) * | 2012-08-30 | 2014-03-26 | 三星电子株式会社 | Discharging circuit, image forming apparatus having the discharging circuit, and power supply unit |
| CN206422686U (en) * | 2017-01-06 | 2017-08-18 | 浙江凯耀照明股份有限公司 | Anti- overshoot quick discharging circuit |
-
2017
- 2017-01-06 CN CN201710011002.4A patent/CN106612067A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1601079A2 (en) * | 2004-05-26 | 2005-11-30 | Delphi Technologies, Inc. | Dual-mode bus discharging circuit |
| CN102647079A (en) * | 2011-02-16 | 2012-08-22 | 佳能株式会社 | Discharging circuit and power supply |
| CN202309501U (en) * | 2011-10-18 | 2012-07-04 | 康佳集团股份有限公司 | Circuit for restraining overshoot output by switch power supply |
| CN202679230U (en) * | 2012-05-17 | 2013-01-16 | 安徽华东光电技术研究所 | An anti-overshoot slow starting protection circuit with reference output |
| CN103683903A (en) * | 2012-08-30 | 2014-03-26 | 三星电子株式会社 | Discharging circuit, image forming apparatus having the discharging circuit, and power supply unit |
| CN206422686U (en) * | 2017-01-06 | 2017-08-18 | 浙江凯耀照明股份有限公司 | Anti- overshoot quick discharging circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107623430A (en) * | 2017-09-07 | 2018-01-23 | 浙江凯耀照明股份有限公司 | Anti- overshoot circuit with the damping of wide output area |
| CN107623430B (en) * | 2017-09-07 | 2023-10-24 | 浙江凯耀照明股份有限公司 | Overshoot prevention circuit with wide output range damping |
| CN113422505A (en) * | 2021-07-08 | 2021-09-21 | 上海芯龙半导体技术股份有限公司南京分公司 | Voltage overshoot protection circuit, switching power supply chip and switching power supply system |
| CN113422505B (en) * | 2021-07-08 | 2022-04-08 | 上海芯龙半导体技术股份有限公司南京分公司 | Voltage overshoot protection circuit, switching power supply chip and switching power supply system |
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| PB01 | Publication | ||
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Application publication date: 20170503 |