CN207251464U - Anti- overshoot circuit with the damping of wide output area - Google Patents
Anti- overshoot circuit with the damping of wide output area Download PDFInfo
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- CN207251464U CN207251464U CN201721144121.9U CN201721144121U CN207251464U CN 207251464 U CN207251464 U CN 207251464U CN 201721144121 U CN201721144121 U CN 201721144121U CN 207251464 U CN207251464 U CN 207251464U
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Abstract
The utility model discloses a kind of anti-overshoot circuit with wide output area damping, including antihunt circuit, charging circuit, discharge loop, on-off circuit, power supply circuit and negative pressure cut-off circuit；Antihunt circuit is electrically connected with on-off circuit, on-off circuit is electrically connected with discharge loop and charging circuit respectively, discharge loop is electrically connected with power supply circuit and negative pressure cut-off circuit respectively, power supply circuit is electrically connected with on-off circuit and antihunt circuit respectively, and negative pressure cut-off circuit is electrically connected with on-off circuit, antihunt circuit and charging circuit respectively.The utility model has the characteristics that effectively to alleviate voltage, current impulse to load and damage of facilities.
Description
Technical field
D/C power, LED driver start-up technique field are the utility model is related to, can effectively alleviate electricity more particularly, to one kind
Pressure, current impulse are to the anti-overshoot circuit with wide output area damping of load and damage of facilities.
Background technology
As country widelys popularize energy-conserving product, D/C power and LED driver are increasing in the market demand, at the same time
The requirement of higher is proposed to the security of matched load and equipment.Particularly in LED illumination application, module finely customizes, and protects
Lamp bead is protected, requirements at the higher level are proposed to lamps and lanterns service life, while impression of the client in switching on and shutting down to light is required higher and higher.
Removing few part singlechip control chip on the market has outside soft start concept, and most driving chip is without this
Function.And now in market competition, ultra-wide output voltage use scope, occupation rate is higher and higher.Demand constantly rises same
When, ultra-wide output voltage range proposes new challenge to overshooting problem.It is particularly this super in output window voltage 30%-100%
It in width application, almost can guarantee that less than 30% loads without that family's chip on the market, in continuous switching on and shutting down, it is existing to occur without overshoot
As.
Utility model content
The utility model is in order to overcome in the prior art, in D/C power and the ultra-wide output voltage range of LED driver
Under, the problem of easily producing overshoot, load and equipment damaged, there is provided one kind can effectively alleviate voltage, current impulse
To the anti-overshoot circuit with wide output area damping of load and damage of facilities.
To achieve the above object, the utility model uses following technical scheme：
A kind of anti-overshoot circuit with wide output area damping, including antihunt circuit, charging circuit, discharge loop, is opened
Powered-down road, power supply circuit and negative pressure cut-off circuit；Antihunt circuit is electrically connected with on-off circuit, on-off circuit respectively with discharge loop
It is electrically connected with charging circuit, discharge loop is electrically connected with power supply circuit and negative pressure cut-off circuit respectively, and power supply circuit is respectively with opening
Powered-down road and antihunt circuit are electrically connected, and negative pressure cut-off circuit is electrically connected with on-off circuit, antihunt circuit and charging circuit respectively.
The thinking of the utility model is, will be below extra small window voltage, caused overshoot voltage during continuous switching on and shutting down
Or electric current, first sealed in appropriate pure resistance in major loop, voltage, current impulse are damped by resistance and give output electricity
Solution charging, allows voltage and current slowly to export the energy of needs.After start completion, with metal-oxide-semiconductor by resistive short, resistance is not allowed to exist
Loss is produced in major loop, so that when solving high-speed switch machine, damping prevents the process that voltage and current overshoots, while effectively protection
LED module simultaneously makes LED slowly be lit, impression of the lifting user to light.The utility model have can effectively alleviate voltage, electric current
The characteristics of pulse is to load and damage of facilities.
Preferably, antihunt circuit includes resistance RS85A, resistance RS85B and resistance RS85C, resistance RS85A, resistance
RS85B and resistance RS85C are parallel with one another, and one end of resistance RS85A, resistance RS85B and resistance RS85C are respectively electric with switch
Road, negative pressure cut-off circuit and charging circuit are electrically connected, and the other end of resistance RS85A, resistance RS85B and resistance RS85C are respectively
It is electrically connected with on-off circuit and power supply circuit.Resistance RS85A, resistance RS85B and resistance RS85C are damping resistance, for preventing
Output loop overshoots.
Preferably, on-off circuit includes metal-oxide-semiconductor QS82, capacitance CS82 and zener diode ZS81, capacitance CS82 and steady
Press diode ZS81 in parallel, the anode of zener diode ZS81 respectively with capacitance CS82, discharge loop, charging circuit and metal-oxide-semiconductor
The grid of QS82 is electrically connected, the cathode of zener diode ZS81 respectively with capacitance CS82, antihunt circuit, metal-oxide-semiconductor QS82 source electrode
It is electrically connected with power supply circuit.
Preferably, discharge loop includes metal-oxide-semiconductor QS81, resistance RS82A, resistance RS82B, diode DS83 and capacitance
CS83, resistance RS82A and resistance RS82B are in parallel, and one end of resistance RS82A and resistance RS82B is respectively with on-off circuit and filling
Drain electrode of the other end of circuit electrical connection, resistance RS82A and resistance RS82B with metal-oxide-semiconductor QS81 is electrically connected, diode DS83
It is in parallel with capacitance CS83, the anode of diode the DS83 grid with metal-oxide-semiconductor QS81, capacitance CS83, power supply circuit and negative pressure respectively
Cut-off circuit is electrically connected, and the source electrode with metal-oxide-semiconductor QS81, capacitance CS83 and charging circuit are electrically connected the cathode of diode DS83 respectively
Connect.Discharge loop is used to discharge the electricity in capacitance CS82.
Preferably, charging circuit includes resistance RS86, resistance RS81, capacitance CS81, diode DS81 and diode
The anode of DS82, diode DS81 are electrically connected with the cathode of diode DS82 and one end of capacitance CS81 respectively, capacitance CS81's
The other end is electrically connected with antihunt circuit, on-off circuit and negative pressure cut-off circuit respectively, anode and the resistance RS81 of diode DS82
One end be electrically connected, the other end of resistance RS81 is electrically connected with on-off circuit and discharge loop respectively, the cathode of diode DS81
It is electrically connected with one end of resistance RS86, the other end of resistance RS86 is electrically connected with discharge loop.It is high while having power supply power supply
Frequency pump capacitance CS81 by rectifier diode DS81 and diode DS82, output current through resistance RS81 current limlitings to capacitance CS82 into
Row charging, to ensure that the time constant of charging after overshoot current, opens switch mosfet pipe QS82.
Preferably, negative pressure cut-off circuit includes resistance RS84A, resistance RS84B, diode DS84 and zener diode
The anode of ZS82, diode DS84 are electrically connected with antihunt circuit, on-off circuit and charging circuit respectively, the cathode of diode DS84
It is electrically connected with one end of resistance RS84A, the other end of resistance RS84A is electrically connected with one end of resistance RS84B, resistance RS84B's
The other end is electrically connected with the cathode of zener diode ZS82, and zener diode ZS82's is electric with discharge loop and power supply circuit respectively
Connection.Negative pressure cut-off circuit can produce certain negative pressure and be applied in the driving electrodes of metal-oxide-semiconductor QS81, allow at metal-oxide-semiconductor QS81
In cut-off state.
Preferably, power supply circuit includes resistance RS83, one end of resistance RS83 is ended with discharge loop and negative pressure respectively
Circuit is electrically connected, and the other end of resistance RS83 is electrically connected with antihunt circuit and on-off circuit respectively.
Preferably, the utility model further includes inductor L41C, capacitance C31A, diode DS44, electrolytic capacitor C41A
In parallel with electrolytic capacitor C41B, electrolytic capacitor C41A and electrolytic capacitor C41B, one end of inductor L41C is ended with negative pressure respectively
The cathode of circuit, charging circuit and diode DS44 is electrically connected, the other end of inductor L41C respectively with charging circuit, discharge back
The anode on road, the anode of electrolytic capacitor C41A and electrolytic capacitor C41B is electrically connected, and the anode of diode DS44 is electric with damping respectively
Road and on-off circuit are electrically connected, the cathode of electrolytic capacitor C41A and the cathode of electrolytic capacitor C41B respectively with power supply circuit, resistance
Buddhist nun's circuit and on-off circuit are electrically connected.After power-off, whole major loop is stopped, the voltage on output capacitance C41, warp
Resistance RS83 is to capacitance CS83 quick charges.
Therefore, the utility model has the advantages that：（1）Voltage, current impulse can effectively be alleviated to loading and setting
Standby destruction；（2）LED module can effectively be protected and LED is slowly lit, impression of the lifting user to light.
Brief description of the drawings
Fig. 1 is a kind of circuit diagram of the utility model.
In figure：Antihunt circuit 1, charging circuit 2, discharge loop 3, on-off circuit 4, power supply circuit 5, negative pressure cut-off circuit 6.
Embodiment
The utility model is further described with embodiment below in conjunction with the accompanying drawings：
A kind of anti-overshoot circuit with wide output area damping as shown in Figure 1, including antihunt circuit 1, charging circuit
2, discharge loop 3, on-off circuit 4, power supply circuit 5 and negative pressure cut-off circuit 6；Antihunt circuit is electrically connected with on-off circuit, switch
Circuit is electrically connected with discharge loop and charging circuit respectively, and discharge loop is electrically connected with power supply circuit and negative pressure cut-off circuit respectively
Connect, power supply circuit is electrically connected with on-off circuit and antihunt circuit respectively, negative pressure cut-off circuit respectively with on-off circuit, antihunt circuit
It is electrically connected with charging circuit.
Antihunt circuit includes resistance RS85A, resistance RS85B and resistance RS85C, resistance RS85A, resistance RS85B and resistance
RS85C is parallel with one another, and one end of resistance RS85A, resistance RS85B and resistance RS85C are respectively electric with on-off circuit, negative pressure cut-off
Road and charging circuit are electrically connected, the other end of resistance RS85A, resistance RS85B and resistance RS85C respectively with on-off circuit and confession
Circuit is electrically connected.Resistance RS85A, resistance RS85B and resistance RS85C are damping resistance, for preventing output loop from occurring
Punching.
On-off circuit includes metal-oxide-semiconductor QS82, capacitance CS82 and zener diode ZS81, capacitance CS82 and zener diode
ZS81 is in parallel, the anode of zener diode ZS81 grid with capacitance CS82, discharge loop, charging circuit and metal-oxide-semiconductor QS82 respectively
Pole is electrically connected, and the cathode of zener diode ZS81 is electric with capacitance CS82, antihunt circuit, the source electrode of metal-oxide-semiconductor QS82 and power supply respectively
Road is electrically connected.
Discharge loop includes metal-oxide-semiconductor QS81, resistance RS82A, resistance RS82B, diode DS83 and capacitance CS83, resistance
RS82A and resistance RS82B is in parallel, and one end of resistance RS82A and resistance RS82B are respectively electric with on-off circuit and charging circuit
Drain electrode of the other end of connection, resistance RS82A and resistance RS82B with metal-oxide-semiconductor QS81 is electrically connected, diode DS83 and capacitance
CS83 is in parallel, and the grid with metal-oxide-semiconductor QS81, capacitance CS83, power supply circuit and negative pressure cut-off are electric respectively for the anode of diode DS83
Road is electrically connected, and the source electrode with metal-oxide-semiconductor QS81, capacitance CS83 and charging circuit are electrically connected the cathode of diode DS83 respectively.Electric discharge
Circuit is used to discharge the electricity in capacitance CS82.
Charging circuit includes resistance RS86, resistance RS81, capacitance CS81, diode DS81 and diode DS82, diode
The anode of DS81 is electrically connected with the cathode of diode DS82 and one end of capacitance CS81 respectively, the other end of capacitance CS81 respectively with
Antihunt circuit, on-off circuit and negative pressure cut-off circuit are electrically connected, and the anode of diode DS82 is electrically connected with one end of resistance RS81,
The other end of resistance RS81 is electrically connected with on-off circuit and discharge loop respectively, the cathode of diode DS81 and the one of resistance RS86
End is electrically connected, and the other end of resistance RS86 is electrically connected with discharge loop.While having power supply power supply, high frequency pump capacitance CS81 leads to
Over commutation diode DS81 and diode DS82, output current charges through resistance RS81 current limlitings to capacitance CS82, to ensure
The time constant of charging opens switch mosfet pipe QS82 after overshoot current.
Negative pressure cut-off circuit includes resistance RS84A, resistance RS84B, diode DS84 and zener diode ZS82, diode
The anode of DS84 is electrically connected with antihunt circuit, on-off circuit and charging circuit respectively, cathode and the resistance RS84A of diode DS84
One end be electrically connected, the other end of resistance RS84A is electrically connected with one end of resistance RS84B, the other end of resistance RS84B and voltage stabilizing
The cathode of diode ZS82 is electrically connected, and zener diode ZS82's is electrically connected with discharge loop and power supply circuit respectively.Negative pressure is cut
Only circuit can produce certain negative pressure and be applied in the driving electrodes of metal-oxide-semiconductor QS81, allow metal-oxide-semiconductor QS81 to be in cut-off state.
Power supply circuit includes resistance RS83, and one end of resistance RS83 is electrically connected with discharge loop and negative pressure cut-off circuit respectively
Connect, the other end of resistance RS83 is electrically connected with antihunt circuit and on-off circuit respectively.
In addition, the utility model further includes inductor L41C, capacitance C31A, diode DS44, electrolytic capacitor C41A and electricity
Solve that capacitance C41B, electrolytic capacitor C41A and electrolytic capacitor C41B are in parallel, one end of inductor L41C respectively with negative pressure cut-off circuit,
The cathode of charging circuit and diode DS44 are electrically connected, the other end of inductor L41C respectively with charging circuit, discharge loop, electricity
The anode of the anode and electrolytic capacitor C41B that solve capacitance C41A is electrically connected, and the anode of diode DS44 is respectively with antihunt circuit and opening
Powered-down road is electrically connected, the cathode of electrolytic capacitor C41A and the cathode of electrolytic capacitor C41B respectively with power supply circuit, antihunt circuit
It is electrically connected with on-off circuit.After power-off, whole major loop is stopped, the voltage on output capacitance C41, through resistance
RS83 is to capacitance CS83 quick charges.
The operation principle and mode of the utility model are as follows：
After power supply is opened, discharge outputting inductance L41 by output diode DS44 and secondary outputting inductance L41C and deposit
The energy of storage, direct current forms no overshoot current and delays to rise and give electrolytic capacitor C41 chargings by damping resistance RS85 current limlitings after rectification,
Stable DC source is formed to load.While power supply, high frequency pumps capacitance CS81 by rectifier diode DS81 and DS82,
Output current charges through RS81 current limlitings to CS82, to ensure the time constant of charging after overshoot current, to metal-oxide-semiconductor
QS82 is opened, so that losses of the short-circuit resistance RS85 in major loop.
During steady operation, the high-frequency ac power formed on inductance L41 is through DS84 rectifying tubes, RS84 divider resistances, ZS82
Voltage-stabiliser tube and CS83 capacitance partial pressures, produce certain negative pressure and are applied in the driving electrodes of QS81 discharge tubes, allow QS81 discharge tubes
In cut-off state, to ensure that metal-oxide-semiconductor QS82 is fully on, losses of the resistance RS85 in main line is reduced.
When powered-down after, whole major loop is stopped, the voltage on output capacitance C41, and capacitance CS83 is given through RS83 resistance
While quick charge, pass through L41 coil discharges to electrolytic capacitor C41 through ZS82 voltage-stabiliser tubes and resistance RS84 and rectifying tube DS84
Anode.Capacitance CS83 voltages are rapidly achieved the voltage that discharge tube QS81 drivings require, and allow QS81 fast conductings, form electrolysis electricity
Hold the upper voltages of C41 through zener diode ZS81 can forward conduction, then formed quickly with QS81 discharge tubes through RS82 discharge resistances
Discharge loop, makes output voltage quickly reach below LED module blanking voltage, and LED module twilight sunset is reduced to reach repid discharge
The light time.
It is to be understood that the present embodiment is merely to illustrate the utility model rather than limitation the scope of the utility model.In addition
It is to be understood that after reading the content taught by the present invention, those skilled in the art can make the utility model various
Change or modification, these equivalent forms also fall within the scope of the appended claims of the present application.
Claims (8)
1. a kind of anti-overshoot circuit with wide output area damping, it is characterized in that, including antihunt circuit（1）, charging circuit
（2）, discharge loop（3）, on-off circuit（4）, power supply circuit（5）With negative pressure cut-off circuit（6）；Antihunt circuit and on-off circuit electricity
Connection, on-off circuit are electrically connected with discharge loop and charging circuit respectively, and discharge loop ends with power supply circuit and negative pressure respectively
Circuit is electrically connected, and power supply circuit is electrically connected with on-off circuit and antihunt circuit respectively, negative pressure cut-off circuit respectively with on-off circuit,
Antihunt circuit and charging circuit are electrically connected.
2. the anti-overshoot circuit with wide output area damping according to claim 1, it is characterized in that, antihunt circuit includes
Resistance RS85A, resistance RS85B and resistance RS85C, resistance RS85A, resistance RS85B and resistance RS85C are parallel with one another, resistance
One end of RS85A, resistance RS85B and resistance RS85C are respectively electrically connected with on-off circuit, negative pressure cut-off circuit and charging circuit
Connect, the other end of resistance RS85A, resistance RS85B and resistance RS85C are respectively electrically connected with on-off circuit and power supply circuit.
3. the anti-overshoot circuit with wide output area damping according to claim 1, it is characterized in that, on-off circuit includes
Metal-oxide-semiconductor QS82, capacitance CS82 and zener diode ZS81, capacitance CS82 and zener diode ZS81 are in parallel, zener diode
Grid of the anode of ZS81 respectively with capacitance CS82, discharge loop, charging circuit and metal-oxide-semiconductor QS82 is electrically connected, zener diode
The cathode of ZS81 is electrically connected with capacitance CS82, antihunt circuit, the source electrode of metal-oxide-semiconductor QS82 and power supply circuit respectively.
4. the anti-overshoot circuit with wide output area damping according to claim 1, it is characterized in that, discharge loop includes
Metal-oxide-semiconductor QS81, resistance RS82A, resistance RS82B, diode DS83 and capacitance CS83, resistance RS82A and resistance RS82B are in parallel,
One end of resistance RS82A and resistance RS82B are respectively electrically connected with on-off circuit and charging circuit, resistance RS82A and resistance
Drain electrode of the other end of RS82B with metal-oxide-semiconductor QS81 is electrically connected, and diode DS83 and capacitance CS83 are in parallel, diode DS83's
The grid with metal-oxide-semiconductor QS81, capacitance CS83, power supply circuit and negative pressure cut-off circuit are electrically connected anode respectively, diode DS83's
The source electrode with metal-oxide-semiconductor QS81, capacitance CS83 and charging circuit are electrically connected cathode respectively.
5. the anti-overshoot circuit with wide output area damping according to claim 1, it is characterized in that, charging circuit includes
Resistance RS86, resistance RS81, capacitance CS81, diode DS81 and diode DS82, the anode of diode DS81 respectively with two poles
One end of the cathode of pipe DS82 and capacitance CS81 are electrically connected, the other end of capacitance CS81 respectively with antihunt circuit, on-off circuit and
Negative pressure cut-off circuit is electrically connected, and the anode of diode DS82 is electrically connected with one end of resistance RS81, the other end point of resistance RS81
It is not electrically connected with on-off circuit and discharge loop, the cathode of diode DS81 is electrically connected with one end of resistance RS86, resistance RS86
The other end be electrically connected with discharge loop.
6. the anti-overshoot circuit with wide output area damping according to claim 1, it is characterized in that, negative pressure cut-off circuit
Including resistance RS84A, resistance RS84B, diode DS84 and zener diode ZS82, the anode of diode DS84 respectively with damping
Circuit, on-off circuit and charging circuit are electrically connected, and the cathode of diode DS84 is electrically connected with one end of resistance RS84A, resistance
The other end of RS84A is electrically connected with one end of resistance RS84B, the other end of resistance RS84B and the cathode of zener diode ZS82
It is electrically connected, zener diode ZS82's is electrically connected with discharge loop and power supply circuit respectively.
7. the anti-overshoot circuit with wide output area damping according to claim 1, it is characterized in that, power supply circuit includes
One end of resistance RS83, resistance RS83 are electrically connected with discharge loop and negative pressure cut-off circuit respectively, the other end point of resistance RS83
It is not electrically connected with antihunt circuit and on-off circuit.
8. the anti-overshoot circuit with wide output area damping according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, its
It is characterized in, further includes inductor L41C, capacitance C31A, diode DS44, electrolytic capacitor C41A and electrolytic capacitor C41B, electrolysis electricity
Hold that C41A and electrolytic capacitor C41B are in parallel, one end of inductor L41C respectively with negative pressure cut-off circuit, charging circuit and diode
The cathode of DS44 is electrically connected, the other end of inductor L41C respectively with charging circuit, discharge loop, electrolytic capacitor C41A anode
It is electrically connected with the anode of electrolytic capacitor C41B, the anode of diode DS44 is electrically connected with antihunt circuit and on-off circuit respectively, electricity
The cathode of solution capacitance C41A and the cathode of electrolytic capacitor C41B are respectively electrically connected with power supply circuit, antihunt circuit and on-off circuit
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721144121.9U CN207251464U (en) | 2017-09-07 | 2017-09-07 | Anti- overshoot circuit with the damping of wide output area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721144121.9U CN207251464U (en) | 2017-09-07 | 2017-09-07 | Anti- overshoot circuit with the damping of wide output area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207251464U true CN207251464U (en) | 2018-04-17 |
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ID=61887482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721144121.9U Active CN207251464U (en) | 2017-09-07 | 2017-09-07 | Anti- overshoot circuit with the damping of wide output area |
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| Country | Link |
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| CN (1) | CN207251464U (en) |
Cited By (1)
| 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 |
-
2017
- 2017-09-07 CN CN201721144121.9U patent/CN207251464U/en active Active
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 |
| 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 |
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