CN103796387A - LED drive device, battery charger and drive control circuit of LED drive device - Google Patents
LED drive device, battery charger and drive control circuit of LED drive device Download PDFInfo
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- CN103796387A CN103796387A CN201410033133.9A CN201410033133A CN103796387A CN 103796387 A CN103796387 A CN 103796387A CN 201410033133 A CN201410033133 A CN 201410033133A CN 103796387 A CN103796387 A CN 103796387A
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Abstract
The invention relates to a drive control circuit which comprises an input power module connected with an input end, a PWM control module connected with the input power module, a perfusion circuit module connected with the output end of the PWM control module, a voltage fluctuation detection module connected with the input power module through an inductor L1 and a constant current source module connected with the voltage fluctuation detection module through a diode D4, wherein the constant current source module is connected with a load. Compared with the prior art, the drive control circuit has the advantages that an electrolysis capacitor is not included in the circuit, the circuit is simple in structure and can be conveniently integrated and miniaturized, and the service life of a power supply is long; the input power module has a reverse-connection-proof function, when the power supply is reversely connected, the circuit does not work, and safety and reliability of the circuit are effectively improved; output wide voltages and currents are adjustable, the adjustable interval is large, use flexibility is high, the application range is wide, and popularization is easy to achieve; the voltage fluctuation detection module can meet requirements for multiple functions and variety.
Description
Technical field
The present invention relates to load driving circuits control technology field, specifically a kind ofly provide the Drive and Control Circuit of constant pressure and flow for load.
Background technology
Adopting LED lamp to realize illumination is just obtaining applying more and more widely, but LED lamp cannot directly connect power supply, and need to could normally work as its driving power by the power supply of good stability, the driving method of LED is of all kinds, existing LED driving power has mostly adopted the constant current method of switch voltage-stabilizing, but this method cost is high, circuit is more complicated, also has electromagnetic interference; In power supply converts the circuit of constant current drive source to, mostly all include electrochemical capacitor device, and electrochemical capacitor electrolyte is easily dry breakdown, has affected the useful life of constant current drive source.
Therefore, how to realize that a kind of circuit is simple, cost is lower, and the LED driving power of growing useful life is technical problem urgently to be resolved hurrily in the industry.
Summary of the invention
The technical problem to be solved in the present invention is, in converting the circuit of constant current or constant voltage drive source to, power supply mostly comprises electrochemical capacitor device for prior art, the problem that has affected the useful life of constant current drive source, provides a kind of Drive and Control Circuit, the simple and long service life of circuit.
Another technical problem that the present invention will solve is, in converting the circuit of constant current or constant voltage drive source to, power supply mostly comprises electrochemical capacitor device for prior art, affect the problem in the useful life of constant current drive source, provide a kind of LED drive unit, the simple and long service life of Drive and Control Circuit syndeton wherein.
The technical problem again that the present invention will solve is, in converting the circuit of constant current or constant voltage drive source to, power supply mostly comprises electrochemical capacitor device for prior art, affect the problem in the useful life of constant current drive source, provide a kind of battery charger, the simple and long service life of Drive and Control Circuit syndeton wherein.
In order to address the above problem, the technical solution adopted in the present invention is: construct a kind of Drive and Control Circuit, comprise the input power module being connected with input, the PWM control module being connected with described input power module, it is characterized in that: also comprise the perfusion circuit module being connected with the output of PWM control module, the voltage up-down detection module being connected by playing the inductance L 1 of choked flow filter action with input power module, and the constant-current source module being connected with voltage up-down detection module by diode D4, the working power of wherein said perfusion circuit module is provided by the output of input power module, node between described electric L1 sense and voltage up-down detection module is connected with perfusion circuit module, node between described voltage up-down detection module and diode D4 anode is by inductance L 2 ground connection, by resistance R 4, the potential-divider network that resistance R 5 forms is connected in parallel between diode D4 negative electrode and ground, the intermediate node of potential-divider network is connected with the feedback port of PWM control module, constant-current source module is connected with load.
Preferably, described input power module comprises anti-reverse unit and series voltage stabilizing unit, and described anti-reverse unit is made up of diode D1, diode D2, and the negative electrode of diode D1 is connected in parallel on the both positive and negative polarity of input after docking with diode D2 negative electrode; Described series voltage stabilizing unit comprises triode Q1 and voltage stabilizing didoe D3, wherein the negative electrode of voltage stabilizing didoe D3 is connected with the base stage of triode Q1, the collector electrode of triode Q1 is connected with input anode by diode D1, and the transmitting of triode is the output of input power module very.
Preferably, described perfusion circuit module is made up of triode Q3, triode Q4 and metal-oxide-semiconductor M1, wherein said triode Q3, triode Q4 composition Class B single supply complementary symmetry circuit, it is exported the metal-oxide-semiconductor M1 that is connected with the grid of metal-oxide-semiconductor and is connected in parallel between second end and ground of the first inductance.
Preferably, described voltage up-down detection module comprises capacitance C6 and capacitance C7, for detection of the lifting of voltage.
Preferably, described PWM control module comprises the IC chip U1 that produces pwm signal, and the compensation pins of wherein said IC chip U1 is connected with the RC circuit for electric current and voltage phasing.
Preferably, described constant-current source module comprises a damping constant current chip U2.
Preferably, described diode D4 is Schottky diode.
Preferably, described metal-oxide-semiconductor is enhancement mode N-channel MOS FET.
In order to address the above problem, another technical scheme of the present invention is: construct a kind of LED drive unit, comprise above-mentioned Drive and Control Circuit, wherein said load is LED module.
In order to address the above problem, another technical scheme of the present invention is: construct a kind of battery charger, comprise above-mentioned Drive and Control Circuit, wherein said load is by rechargeable battery.
Compared with prior art, tool of the present invention has the following advantages: one, in circuit, do not comprise easily dry breakdown electrochemical capacitor, circuit connection structure is simple, is convenient to integrated and miniaturization., and power supply long service life; Two, adopt the wide voltage input of DC (input voltage 3V-80V), input power has anti-reverse function, and in the time of reverse power connection, circuit is not worked, and has effectively improved the safety and reliability of circuit; Three, export wide voltage (5V-70V) adjustable, (0-5A) is adjustable for electric current, and adjustable interval is large, makes it use flexibility ratio higher, and wide application, is more easily promoted; Four, in circuit, there is buck automatic identification circuit module, meet multi-functional, multifarious demand.
Accompanying drawing explanation
Fig. 1 is the structural representation of Drive and Control Circuit of the invention process.
Fig. 2 is the circuit diagram of Drive and Control Circuit of the invention process.
Fig. 3 is the circuit diagram of input power module in Fig. 2.
Fig. 4 is the circuit diagram of PWM control module in Fig. 2.
Fig. 5 is the circuit diagram of perfusion circuit module in Fig. 2.
Fig. 6 is the circuit diagram of LED drive unit of the invention process.
Fig. 7 is the circuit diagram of another kind of LED drive unit of the invention process.
Fig. 8 is the circuit diagram of battery charger of the invention process.
Embodiment
In order to allow those skilled in the art understand better technical scheme of the present invention, below in conjunction with accompanying drawing, the present invention is further elaborated.
The specific embodiment of the present invention is as shown in Fig. 1～Fig. 2, a kind of Drive and Control Circuit, comprise the input power module 1 being connected with input, the PWM control module 2 being connected with described input power module, it is characterized in that: also comprise the perfusion circuit module 3 being connected with the output of PWM control module 2, the voltage up-down detection module 4 being connected by playing the inductance L 1 of choked flow filter action with input power module 1, and the constant-current source module 5 being connected with voltage up-down detection module 4 by diode D4, the working power of wherein said perfusion circuit module 3 is provided by the output of input power module 1, node between described electric L1 sense and voltage up-down detection module 4 is connected with perfusion circuit module 3, node between described voltage up-down detection module 4 and diode D4 anode is by inductance L 2 ground connection, by resistance R 4, the potential-divider network 6 that resistance R 5 forms is connected in parallel between diode D4 negative electrode and ground, the intermediate node of potential-divider network 6 is connected with the feedback port of PWM control module 2, constant-current source module 5 is connected with load 7.
Wherein, input power module 1 comprises anti-reverse unit 101 and series voltage stabilizing unit 102, and described anti-reverse unit is made up of diode D1, diode D2, and the negative electrode of diode D1 is connected in parallel on the both positive and negative polarity of input after docking with diode D2 negative electrode; Described series voltage stabilizing unit comprises triode Q1 and voltage stabilizing didoe D3, wherein the negative electrode of voltage stabilizing didoe D3 is connected with the base stage of triode Q1, the collector electrode of triode Q1 is connected with input anode by diode D1, and the transmitting of triode is the output of input power module very.
Wherein, perfusion circuit module 3 is made up of triode Q3, triode Q4 and metal-oxide-semiconductor M1, wherein said triode Q3, triode Q4 composition Class B single supply complementary symmetry circuit, it is exported the metal-oxide-semiconductor M1 that is connected with the grid of metal-oxide-semiconductor and is connected in parallel between second end and ground of the first inductance.
Wherein, voltage up-down detection module 4 comprises capacitance C6 and capacitance C7, for detection of the lifting of voltage.
Wherein, PWM control module 2 comprises the IC chip U1 that produces pwm signal, and the compensation pins of wherein said IC chip U1 is connected with the RC circuit for electric current and voltage phasing.
Wherein, constant-current source module 5 comprises a damping constant current chip U2.
Wherein, diode D4 is Schottky diode.
Wherein, metal-oxide-semiconductor M1 is enhancement mode N-channel MOS FET.
The voltage of the accessible voltage 3V-80V of the input of Drive and Control Circuit as shown in Fig. 3～Fig. 5, the working power of the single supply complementary symmetry circuit in IC chip U1 and perfusion circuit module 3 in PWM control module 2 obtains by the conducting of controlling triode Q1.Perfusion circuit module 3 is for expanding stream, and its process that realizes expansion stream is as follows:
IC chip U1 output has the square-wave signal of certain duty ratio to the input of perfusion circuit module 3, in the time of positive half period in square-wave signal, triode Q2 conducting, triode Q3 cut-off, metal-oxide-semiconductor M1 conducting, diode D4 oppositely ends, and the choked flow electric current of inductance L 1 increases, and electric energy converts electromagnetic energy to and is stored in inductance L 1; In the time of negative half-cycle in square-wave signal, triode Q2 cut-off, triode Q3 conducting, now, triode Q3 is equivalent to the repid discharge passage of metal-oxide-semiconductor M1, makes metal-oxide-semiconductor M1 cut-off, diode D4 conducting, the choked flow electric current of inductance L 1 slowly reduces, and the electromagnetic energy in inductance L 1 converts electric energy output to.
The intermediate node of potential-divider network 6 is connected to the feedback port of IC chip U1, makes to adjust to obtain constant voltage output, and in the present embodiment, constant voltage output port A is the connected node between diode D4 negative electrode and potential-divider network 6.
In the present invention, IC chip U1 and damping constant current chip U2 jointly complete the constant current constant voltage output of drive circuit and control.
In the time there is the situation of reverse power connection, due to the reverse cut-off of diode D1 and the conducting effect of diode D2, drive circuit is not worked.
As previously mentioned, load 7 can be various equipment, the devices etc. that need constant current or constant voltage control, for example automobile LED illumination, solar recharging, mobile phone large current charge, high-power mapping infrared emission, portable lightings etc., particularly include but not limited to LED, battery etc.Therefore, Drive and Control Circuit of the present invention can be applied to LED light fixture, battery charger etc.As shown in Fig. 6～8.Fig. 6 is the Drive and Control Circuit of LED drive unit; Fig. 7 is the another kind of execution mode of the Drive and Control Circuit of LED drive unit, is applicable to the load higher to electric current and voltage requirement, as baby's milk heating, high-precision servo motor etc.; Fig. 8 is the Drive and Control Circuit of battery charger.
The above is preferred embodiments of the present invention, not the present invention is done to any pro forma restriction.It should be noted that; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. a Drive and Control Circuit, comprise the input power module (1) being connected with input, the PWM control module (2) being connected with described input power module, it is characterized in that: also comprise the perfusion circuit module (3) being connected with the output of PWM control module (2), the voltage up-down detection module (4) being connected by playing the inductance L 1 of choked flow filter action with input power module (1), and the constant-current source module (5) being connected with voltage up-down detection module (4) by diode D4, the working power of wherein said perfusion circuit module (3) is provided by the output of input power module (1), node between described electric L1 sense and voltage up-down detection module (4) is connected with perfusion circuit module (3), node between described voltage up-down detection module (4) and diode D4 anode is by inductance L 2 ground connection, by resistance R 4, the potential-divider network (6) that resistance R 5 forms is connected in parallel between diode D4 negative electrode and ground, the intermediate node of potential-divider network (6) is connected with the feedback port of PWM control module (2), constant-current source module (5) is connected with load (7).
2. Drive and Control Circuit according to claim 1, it is characterized in that, described input power module (1) comprises anti-reverse unit (101) and series voltage stabilizing unit (102), described anti-reverse unit is made up of diode D1, diode D2, and the negative electrode of diode D1 is connected in parallel on the both positive and negative polarity of input after docking with diode D2 negative electrode; Described series voltage stabilizing unit comprises triode Q1 and voltage stabilizing didoe D3, wherein the negative electrode of voltage stabilizing didoe D3 is connected with the base stage of triode Q1, the collector electrode of triode Q1 is connected with input anode by diode D1, and the transmitting of triode is the output of input power module very.
3. Drive and Control Circuit according to claim 2, it is characterized in that, described perfusion circuit module (3) is made up of triode Q3, triode Q4 and metal-oxide-semiconductor M1, wherein said triode Q3, triode Q4 composition Class B single supply complementary symmetry circuit, it is exported the metal-oxide-semiconductor M1 that is connected with the grid of metal-oxide-semiconductor and is connected in parallel between second end and ground of the first inductance.
4. Drive and Control Circuit according to claim 3, is characterized in that, described voltage up-down detection module (4) comprises capacitance C6 and capacitance C7, for detection of the lifting of voltage.
5. Drive and Control Circuit according to claim 4, is characterized in that, described PWM control module (2) comprises the IC chip U1 that produces pwm signal, and the compensation pins of wherein said IC chip U1 is connected with the RC circuit for electric current and voltage phasing.
6. Drive and Control Circuit according to claim 5, is characterized in that, described constant-current source module (5) comprises a damping constant current chip U2.
7. Drive and Control Circuit according to claim 6, is characterized in that, described diode D4 is Schottky diode.
8. Drive and Control Circuit according to claim 7, is characterized in that, described metal-oxide-semiconductor is enhancement mode N-channel MOS FET.
9. a LED drive unit, is characterized in that, comprises Drive and Control Circuit as claimed in claim 1, and wherein said load is LED module.
10. a battery charger, is characterized in that, comprises Drive and Control Circuit as claimed in claim 1, and wherein said load is by rechargeable battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410033133.9A CN103796387B (en) | 2013-12-27 | 2014-01-24 | A kind of LED drive device, battery charger and driving control circuit thereof |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320871428 | 2013-12-27 | ||
| CN201320871428.4 | 2013-12-27 | ||
| CN2013208714284 | 2013-12-27 | ||
| CN201410033133.9A CN103796387B (en) | 2013-12-27 | 2014-01-24 | A kind of LED drive device, battery charger and driving control circuit thereof |
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| Publication Number | Publication Date |
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| CN103796387A true CN103796387A (en) | 2014-05-14 |
| CN103796387B CN103796387B (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420044572.5U Expired - Fee Related CN203675400U (en) | 2013-12-27 | 2014-01-24 | LED drive device, battery charger and drive control circuit thereof |
| CN201410033133.9A Expired - Fee Related CN103796387B (en) | 2013-12-27 | 2014-01-24 | A kind of LED drive device, battery charger and driving control circuit thereof |
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| CN201420044572.5U Expired - Fee Related CN203675400U (en) | 2013-12-27 | 2014-01-24 | LED drive device, battery charger and drive control circuit thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106304517A (en) * | 2015-05-13 | 2017-01-04 | 江苏施诺照明有限公司 | A kind of super wide voltage constant current Universal LED lamp drive circuit |
| CN106356998A (en) * | 2016-09-27 | 2017-01-25 | 深圳市汉莫智能科技股份有限公司 | Front-end control circuit for intelligent power distribution system and method thereof |
| CN109219211A (en) * | 2017-07-11 | 2019-01-15 | 宁波公牛电器有限公司 | One kind taking electric control circuit, intelligent control switch and intelligent illuminating system |
| CN112133243A (en) * | 2020-09-03 | 2020-12-25 | 四川遂宁市利普芯微电子有限公司 | Display device capable of preventing reverse connection breakdown of power supply |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203675400U (en) * | 2013-12-27 | 2014-06-25 | 陈俞好 | LED drive device, battery charger and drive control circuit thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106304517A (en) * | 2015-05-13 | 2017-01-04 | 江苏施诺照明有限公司 | A kind of super wide voltage constant current Universal LED lamp drive circuit |
| CN106356998A (en) * | 2016-09-27 | 2017-01-25 | 深圳市汉莫智能科技股份有限公司 | Front-end control circuit for intelligent power distribution system and method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN203675400U (en) | 2014-06-25 |
| CN103796387B (en) | 2016-07-06 |
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