CN211352514U - Stable and efficient drive circuit of output and lamp applying same - Google Patents
Stable and efficient drive circuit of output and lamp applying same Download PDFInfo
- Publication number
- CN211352514U CN211352514U CN201921738893.4U CN201921738893U CN211352514U CN 211352514 U CN211352514 U CN 211352514U CN 201921738893 U CN201921738893 U CN 201921738893U CN 211352514 U CN211352514 U CN 211352514U
- Authority
- CN
- China
- Prior art keywords
- unit
- output
- electrically connected
- module
- power supply
- 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.)
- Active
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a stable and high-efficiency driving circuit and a lamp using the same, which comprises a PFC correction boost module, a switch power supply module and a feedback module, wherein the input end of the PFC correction boost module is electrically connected with an external power supply, the input end of the switch power supply module is electrically connected with the output end of the PFC correction boost module, the output end of the switch power supply module can be connected with an external load to supply power to the external load, the input end of the feedback module is electrically connected with the output end of the switch power supply module, the output end of the feedback module is electrically connected with the feedback end of the switch power supply module, the electric energy utilization efficiency is improved, and the switch power supply module is used for feedback voltage reduction driving, so that when high input power factors and low input current harmonics are obtained, the ripple of output voltage is smaller, the voltage adjustment is faster, and the instantaneous response to, the voltage within a certain range is output, and the voltage can be adjusted in time according to the grade of the accessed load, so that the work is stable.
Description
Technical Field
The utility model relates to an electronic circuit, especially a drive circuit.
Background
The traditional lamp driving circuit, generally speaking, a driving circuit can only adapt to a lamp of one specification, for lamps of different specifications, manufacturers must produce and develop a plurality of groups of driving circuits to adapt to the lamp, thereby causing troubles in production and manufacture, greatly increasing the cost, and being very inconvenient for users to adapt to use according to the specification in the using or maintaining process; meanwhile, when the driving circuits with different specifications are in forced matching with the lamp, the driving circuits cannot be adjusted, so that the power factor of the circuit is easily reduced, the power utilization efficiency is low, and the lamp is easily damaged.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide an output is stable and efficient drive circuit and use its lamps and lanterns.
The utility model adopts the technical proposal that:
a stable and efficient output driver circuit comprising:
the input end of the PFC correction boosting module is electrically connected with an external power supply;
the input end of the switching power supply module is electrically connected with the output end of the PFC correction boosting module, and the output end of the switching power supply module can be connected with an external load to supply power to the external load;
and the input end of the feedback module is electrically connected with the output end of the switching power supply module, and the output end of the feedback module is electrically connected with the feedback end of the switching power supply module.
The input end of the rectification filter module is electrically connected with an external alternating current power supply, and the output end of the rectification filter module is electrically connected with the output end of the PFC correction boosting module.
The PFC correction boosting module comprises a power correction unit, an input voltage feedback unit, a first output current feedback unit, a first inductor and a first switch unit;
the input end of the input voltage feedback unit is electrically connected with the output end of the rectification filter module and one end of the first inductor respectively, and the output end of the input voltage feedback unit is electrically connected with the input voltage feedback end of the power correction unit;
the other end of the first inductor is electrically connected with the input end of the first output voltage feedback unit, the input end of the first switch unit and the input end of the switch power supply module respectively, and the output end of the first output voltage feedback unit is electrically connected with the output voltage feedback end of the power correction unit;
the output end of the first switch unit is grounded through the first output current feedback unit;
the output end of the first output current feedback unit is electrically connected with the output current feedback end of the power correction unit;
and the control output end of the power correction unit is electrically connected with the controlled end of the first switch unit.
The PFC correction boost module further comprises an energy storage unit and a diode D8;
one end of the energy storage unit is electrically connected with the one end of the first inductor and the output end of the rectification filter module respectively;
the anode of the diode D8 is electrically connected to the other end of the first inductor, and the cathode of the diode D8 is electrically connected to the other end of the energy storage unit and the input terminal of the switching power supply module, respectively.
The switching power supply module comprises a switching power supply unit, a second switching unit, a second inductor and a resistance-capacitance unit; the feedback module comprises a second output voltage feedback unit and a second output current feedback unit;
the output end of the PFC correction boosting module is electrically connected with one end of the resistance-capacitance unit and one pole of an external load respectively;
one end of the second inductor is electrically connected with the other end of the resistance-capacitance unit and the other end of the external load respectively;
the input end of the second switch unit is electrically connected with the other end of the second inductor;
the output end of the second switch unit is grounded through the second output current feedback unit, and the output end of the second output current feedback unit is electrically connected with the output current feedback end of the switch power supply unit;
the second output voltage feedback unit detects the voltages at two ends of the second inductor, and the output end of the second output voltage feedback unit is electrically connected with the voltage feedback end of the switching power supply unit;
and the control output end of the switching power supply unit is electrically connected with the second switching unit.
The power supply further comprises an overload short-circuit protection module, wherein one end of the overload short-circuit protection module is electrically connected with the output end of the PFC correction boosting module, the one end of the resistance-capacitance unit and the one pole of the external load respectively;
the other end of the overload short-circuit protection module is electrically connected with the one end of the second inductor, the other end of the resistance-capacitance unit and the other end of the external load respectively.
The second output voltage feedback unit comprises a third inductor and a resistor R24, wherein the third inductor is coupled with the second inductor, one end of the third inductor is grounded, the other end of the third inductor is respectively electrically connected with one end of the resistor R24 and the voltage feedback end of the switching power supply unit, and the other end of the resistor R24 is grounded.
The second output current feedback unit comprises a resistor R31 and a resistor R32, one end of the resistor R31 is respectively connected with one end of the resistor R32 and the output end of the second switch unit, the other end of the resistor R32 is grounded, and the other end of the resistor R31 is electrically connected with the output current feedback end of the switch power supply unit.
The drive circuit disclosed above has at least one of the following advantages or benefits:
the utility model discloses drive circuit, PFC correction boost module steps up external power source, and carry out power correction, improve the electric energy utilization efficiency, and utilize switching power supply module to feed back the step-down drive, when obtaining high input power factor and low input current harmonic, output voltage's ripple is less, voltage adjustment is very fast, to the vibration transient response in the circuit, export the voltage of certain limit, can in time adjust according to the grade that inserts the load, can rationally match with the load that inserts, job stabilization.
The utility model also discloses a lamps and lanterns, the stable and efficient drive circuit of output and the LED load that disclose including above-mentioned technical scheme, switching power supply module's output is connected with the LED load and is supplied power for the LED load.
The lamp disclosed by the above has at least one of the following advantages or beneficial effects:
the utility model discloses can the multiple LED load of adaptation to keep output stable, reduce the voltage ripple, have very fast regulating speed, have higher power factor.
Drawings
The following description will further describe embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of the principle structure of the driving circuit of the present invention.
Fig. 2 is a schematic circuit diagram of the rectifying and filtering module of the driving circuit of the present invention.
Fig. 3 is a schematic circuit diagram of the PFS correction boost module of the driving circuit of the present invention.
Fig. 4 is a schematic circuit diagram of the switching power supply module and the feedback module of the driving circuit of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
As shown in fig. 1 to 4, a driving circuit with stable and efficient output includes:
the input end of the PFC correction boost module 1 is electrically connected with an external power supply;
the input end of the switching power supply module 2 is electrically connected with the output end of the PFC correction boosting module 1, and the output end of the switching power supply module 2 can be connected with an external load to supply power to the external load;
feedback module 3, feedback module 3's input and switching power supply module 2's output electric connection, feedback module 3's output and switching power supply module 2's feedback end electric connection.
For example, in some embodiments of the present design, the switching power supply module 2 can output 226V voltage, and for each power load access in the interval of 220V-230V, the present design can adjust in time, and is compatible with each grade of power load.
PFC corrects boost module 1 and steps up external power source, and carry out power correction, improve the electric energy utilization efficiency, and utilize switching power supply module 2 to feed back the step-down drive, when obtaining high input power factor and low input current harmonic, output voltage's ripple is less, voltage adjustment is very fast, to the vibration transient response in the circuit, output certain range's voltage, can in time adjust according to the grade of inserting the load, can rationally match with the load of inserting, job stabilization
In some embodiments, as shown in fig. 2, the apparatus further includes a rectifying and filtering module 4, an input end of the rectifying and filtering module 4 is electrically connected to the external ac power source, and an output end of the rectifying and filtering module 4 is electrically connected to an output end of the PFC correction boost module 1.
The rectifying and filtering module 4 may include a rectifying bridge, a fuse F1, a voltage dependent resistor VR1, a voltage dependent resistor VR2, a filtering capacitor CX1, and the like, and outputs a stable direct current.
In some embodiments, the PFC correction boost module 1 includes a power correction unit 11, an input voltage feedback unit 12, a first output voltage feedback unit 13, a first output current feedback unit 14, a first inductor T1, and a first switching unit 15;
the input end of the input voltage feedback unit 12 is electrically connected to the output end of the rectifying and filtering module 4 and one end of the first inductor T1, respectively, and the output end of the input voltage feedback unit 12 is electrically connected to the input voltage feedback end of the power correction unit 11;
the other end of the first inductor T1 is electrically connected to the input end of the first output voltage feedback unit 12, the input end of the first switch unit 15, and the input end of the switching power supply module 2, respectively, and the output end of the first output voltage feedback unit 13 is electrically connected to the output voltage feedback end of the power correction unit 11;
the output end of the first switching unit 15 is grounded through the first output current feedback unit 14;
the output end of the first output current feedback unit 14 is electrically connected with the output current feedback end of the power correction unit 11;
the control output of the power correction unit 11 is electrically connected to the controlled terminal of the first switching unit 15.
As shown in fig. 3, the power calibration unit 11 may be selected from a conventional power calibration chip, and the first switching unit may be a transistor or a MOS transistor, where a MOS transistor Q1 is used.
The input voltage feedback unit 12 may be a voltage division detection circuit composed of a resistor R3, a resistor R4, a resistor R5, and a resistor R6, one end of the resistor R3 is connected to the output end of the rectifying and filtering module 4, and one end of the resistor R6 is electrically connected to the input voltage feedback end of the power correction unit 11.
The first output current feedback unit 14 includes a resistor R13 and a resistor R14, one end of the resistor R13 is electrically connected to one end of the resistor R14 and the emitter of the MOS transistor Q1, the other end of the resistor R14 is grounded, and the other end of the resistor R13 is electrically connected to the output current feedback end of the power correction unit 11.
The first output voltage feedback unit 13 may be a voltage division detection circuit composed of a resistor R17, a resistor R18, a resistor R19, and a resistor R20, wherein one end of the resistor R17 is connected to the output end of the rectifying and filtering module 4, and one end of the resistor R20 is electrically connected to the output voltage feedback end of the power correction unit 11.
In some embodiments, as shown in fig. 3, the PFC correction boost module 1 further includes an energy storage unit 16 and a diode D8;
one end of the energy storage unit 16 is electrically connected to one end of the first inductor T1 and the output end of the rectification filter module 4, respectively;
the anode of the diode D8 is electrically connected to the other end of the first inductor T1, and the cathode of the diode D8 is electrically connected to the other end of the energy storage unit 16 and the input end of the switching power module 2, respectively.
The energy storage unit 16 can be selected from conventional capacitive elements, and the energy storage unit 16 can improve the boosting capability of the PFC correction boost module 1, and make the adjustment more smooth and flexible.
In some embodiments, as shown in fig. 4, the switching power supply module 2 includes a switching power supply unit 21, a second switching unit 22, a second inductor T2, and a resistance-capacitance unit 23; the feedback module 3 includes a second output voltage feedback unit 31 and a second output current feedback unit 32;
the output end of the PFC correction boost module 1 is electrically connected to one end of the resistance-capacitance unit 23 and one pole of the external load, respectively;
one end of the second inductor T2 is electrically connected to the other end of the rc unit 23 and the other end of the external load, respectively;
the input end of the second switch unit 22 is electrically connected to the other end of the second inductor T2;
the output end of the second switch unit 22 is grounded through the second output current feedback unit 32, and the output end of the second output current feedback unit 32 is electrically connected with the output current feedback end of the switching power supply unit 21;
the second output voltage feedback unit 31 detects the voltage across the second inductor T2, and the output end of the second output voltage feedback unit 31 is electrically connected to the voltage feedback end of the switching power supply unit 21;
the control output terminal of the switching power supply unit 21 is electrically connected to the second switching unit 22.
The switching power supply unit 21 may be selected from a conventional switching power supply chip, the second switching unit 22 may employ a triode or an MOS transistor of a conventional type, an MOS transistor Q2 is employed in one embodiment of the present design, and the resistance-capacitance unit may be composed of a resistor R37, a resistor R39, and a capacitor E4;
in some embodiments, the second output voltage feedback unit 31 includes a third inductor T3 and a resistor R24 coupled to the second inductor T2, one end of the third inductor T3 is grounded, the other end of the third inductor T3 is electrically connected to one end of the resistor R24 and the voltage feedback end of the switching power supply unit 21, and the other end of the resistor R24 is grounded.
The third inductor T3 senses the voltage across the second inductor T2, so as to reflect the magnitude of the output voltage, and the switching power supply unit 21 is convenient to drive and control the second switching unit 22.
In some embodiments, the second output current feedback unit 32 includes a resistor R31 and a resistor R32, one end of the resistor R31 is electrically connected to one end of the resistor R32 and the output end of the second switching unit 22, the other end of the resistor R32 is grounded, and the other end of the resistor R31 is electrically connected to the output current feedback end of the switching power supply unit 21.
The switching power supply unit 21 controls the second switching unit 22 to operate according to the feedback output voltage and output current, thereby adjusting the voltage and current output to both ends of the load.
In some embodiments, the apparatus further includes an overload short-circuit protection module 5, wherein one end of the overload short-circuit protection module 5 is electrically connected to the output end of the PFC correction boost module 1, one end of the resistance-capacitance unit 23, and one pole of the external load, respectively;
the other end of the overload short-circuit protection module 5 is electrically connected to one end of the second inductor T2, the other end of the rc unit 23, and the other end of the external load.
The overload short-circuit protection module 5 may be composed of a voltage-sensitive element TV1, and when the output voltage is too high or the output current is too large to cause the output voltage to rise instantaneously, the voltage-sensitive element can be turned on, so as to protect the load from being damaged.
The utility model discloses a concrete embodiment still discloses a lamps and lanterns, including the stable and efficient drive circuit of output and the LED load that any above-mentioned embodiment discloses, switching power supply module's output and LED load are connected and are supplied power for the LED load.
The utility model discloses can the multiple LED load of adaptation to keep output stable, reduce the voltage ripple, have very fast regulating speed, have higher power factor.
It is readily understood by those skilled in the art that the above-described preferred modes can be freely combined and superimposed without conflict.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (9)
1. A stable and efficient output driver circuit, comprising:
the input end of the PFC correction boosting module is electrically connected with an external power supply;
the input end of the switching power supply module is electrically connected with the output end of the PFC correction boosting module, and the output end of the switching power supply module can be connected with an external load to supply power to the external load;
and the input end of the feedback module is electrically connected with the output end of the switching power supply module, and the output end of the feedback module is electrically connected with the feedback end of the switching power supply module.
2. The driving circuit according to claim 1, wherein: the input end of the rectification filter module is electrically connected with an external alternating current power supply, and the output end of the rectification filter module is electrically connected with the output end of the PFC correction boosting module.
3. A stable and efficient output driver circuit as claimed in claim 2, wherein: the PFC correction boosting module comprises a power correction unit, an input voltage feedback unit, a first output current feedback unit, a first inductor and a first switch unit;
the input end of the input voltage feedback unit is electrically connected with the output end of the rectification filter module and one end of the first inductor respectively, and the output end of the input voltage feedback unit is electrically connected with the input voltage feedback end of the power correction unit;
the other end of the first inductor is electrically connected with the input end of the first output voltage feedback unit, the input end of the first switch unit and the input end of the switch power supply module respectively, and the output end of the first output voltage feedback unit is electrically connected with the output voltage feedback end of the power correction unit;
the output end of the first switch unit is grounded through the first output current feedback unit; the output end of the first output current feedback unit is electrically connected with the output current feedback end of the power correction unit;
and the control output end of the power correction unit is electrically connected with the controlled end of the first switch unit.
4. A stable and efficient output driver circuit as claimed in claim 3, wherein: the PFC correction boost module further comprises an energy storage unit and a diode D8;
one end of the energy storage unit is electrically connected with the one end of the first inductor and the output end of the rectification filter module respectively;
the anode of the diode D8 is electrically connected to the other end of the first inductor, and the cathode of the diode D8 is electrically connected to the other end of the energy storage unit and the input terminal of the switching power supply module, respectively.
5. The driving circuit according to claim 1, wherein: the switching power supply module comprises a switching power supply unit, a second switching unit, a second inductor and a resistance-capacitance unit; the feedback module comprises a second output voltage feedback unit and a second output current feedback unit;
the output end of the PFC correction boosting module is electrically connected with one end of the resistance-capacitance unit and one pole of an external load respectively;
one end of the second inductor is electrically connected with the other end of the resistance-capacitance unit and the other end of the external load respectively;
the input end of the second switch unit is electrically connected with the other end of the second inductor;
the output end of the second switch unit is grounded through the second output current feedback unit, and the output end of the second output current feedback unit is electrically connected with the output current feedback end of the switch power supply unit;
the second output voltage feedback unit detects the voltages at two ends of the second inductor, and the output end of the second output voltage feedback unit is electrically connected with the voltage feedback end of the switching power supply unit;
and the control output end of the switching power supply unit is electrically connected with the second switching unit.
6. The driving circuit of claim 5, wherein: the power supply further comprises an overload short-circuit protection module, wherein one end of the overload short-circuit protection module is electrically connected with the output end of the PFC correction boosting module, the one end of the resistance-capacitance unit and the one pole of the external load respectively;
the other end of the overload short-circuit protection module is electrically connected with the one end of the second inductor, the other end of the resistance-capacitance unit and the other end of the external load respectively.
7. The driving circuit of claim 5, wherein: the second output voltage feedback unit comprises a third inductor and a resistor R24, wherein the third inductor is coupled with the second inductor, one end of the third inductor is grounded, the other end of the third inductor is respectively electrically connected with one end of the resistor R24 and the voltage feedback end of the switching power supply unit, and the other end of the resistor R24 is grounded.
8. The driving circuit of claim 5, wherein: the second output current feedback unit comprises a resistor R31 and a resistor R32, one end of the resistor R31 is respectively connected with one end of the resistor R32 and the output end of the second switch unit, the other end of the resistor R32 is grounded, and the other end of the resistor R31 is electrically connected with the output current feedback end of the switch power supply unit.
9. A lamp comprising a stable and efficient output driving circuit as claimed in any one of claims 1 to 8 and an LED load, wherein the output terminal of the switching power supply module is connected to the LED load to supply power to the LED load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921738893.4U CN211352514U (en) | 2019-10-16 | 2019-10-16 | Stable and efficient drive circuit of output and lamp applying same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921738893.4U CN211352514U (en) | 2019-10-16 | 2019-10-16 | Stable and efficient drive circuit of output and lamp applying same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211352514U true CN211352514U (en) | 2020-08-25 |
Family
ID=72136138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921738893.4U Active CN211352514U (en) | 2019-10-16 | 2019-10-16 | Stable and efficient drive circuit of output and lamp applying same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211352514U (en) |
-
2019
- 2019-10-16 CN CN201921738893.4U patent/CN211352514U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106488607B (en) | Switching Power Supply and television set | |
| CN105813263B (en) | Switching Power Supply and television set | |
| JP3198222U (en) | Charger and charging system | |
| JP6511042B2 (en) | Battery charger for electric vehicles including PFC circuit | |
| CN107069927B (en) | Power supply unit and lighting system | |
| WO2012027719A1 (en) | Power converter with boost-buck-buck configuration | |
| CN108231014B (en) | Regional dimming constant current control circuit, driving power supply and television | |
| EP2709236B1 (en) | Uninterrupted power supply circuit and control method therefor | |
| CN105934017B (en) | A kind of Switching Power Supply feedback control circuit and single- stage PFC high-efficiency constant-flow power driving circuit | |
| CN111509825A (en) | 45W broadband voltage self-adaptation PPS super portable power source structure that fills soon | |
| CN110932546A (en) | Constant-power boost output regulating circuit and circuit control method thereof | |
| EP2555398A1 (en) | Power supply circuit with low-voltage control and producing method thereof | |
| CN215379283U (en) | Constant-current voltage-stabilizing dimming power module and LED dimming device | |
| CN211352514U (en) | Stable and efficient drive circuit of output and lamp applying same | |
| CN203761667U (en) | Electronic electrodeless-dimming intelligent UV (ultraviolet) variable-frequency power source | |
| CN217116054U (en) | Multifunctional key circuit | |
| CN211127580U (en) | Constant power boost output regulating circuit | |
| CN208793296U (en) | A kind of speed regulation circuit for fan | |
| CN103973141B (en) | The full DC frequency converting air-conditioner that a kind of application switch power circuit is powered | |
| CN208112507U (en) | A kind of dedicated DC-DC12V25A converter of electric vehicle with the normal output function of 12V | |
| CN209201210U (en) | Backlight control circuit and electronic equipment | |
| CN106130317A (en) | One-board power supply and television set | |
| CN208210368U (en) | A kind of portable LED tent lamp control circuit | |
| CN207251284U (en) | Power supply unit and lighting system | |
| CN110417274A (en) | The Switching Power Supply that chip can be automatically shut down when a kind of low-load |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |