CN204231725U - Novel RCC switching power circuit - Google Patents
Novel RCC switching power circuit Download PDFInfo
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- CN204231725U CN204231725U CN201420777079.4U CN201420777079U CN204231725U CN 204231725 U CN204231725 U CN 204231725U CN 201420777079 U CN201420777079 U CN 201420777079U CN 204231725 U CN204231725 U CN 204231725U
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- 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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model discloses a kind of novel RCC switching power circuit, comprise input module, the first switching tube, output module and exciting module, this exciting module comprises second switch pipe, RLC oscillating circuit, energy storage circuit and the first resistance, this RLC oscillating circuit connects this input module by this first resistance, this energy storage circuit the first inductance connect in this RLC oscillating circuit also form charging and discharging circuit with this first inductance, the base stage of this second switch pipe can connect this energy storage circuit, and this second switch pipe connects base stage and first resistance of this first switching tube; When this energy storage circuit makes this second switch pipe conducting, this first switching tube turns off; When this energy storage circuit makes this second switch pipe turn off, this first switching tube conducting; Its tool has the following advantages: adopt the ON-OFF control circuit of discrete component formation to the first switching tube, replace IC and control, cost reduces.
Description
Technical field
The utility model relates to a kind of switching power circuit for driving LED light fixture, particularly relates to a kind of novel RCC switching power circuit.
Background technology
Mostly complete switch tube by IC in RCC switching power circuit of the prior art to form PWM and control, the RCC Switching Power Supply cost of formation is higher like this.
Utility model content
The utility model provides a kind of novel RCC switching power circuit, which overcomes the deficiencies in the prior art described in background technology.
The technical scheme adopted that the utility model solves its technical problem is:
Novel RCC switching power circuit, comprise input module, the first switching tube, output module and exciting module, the base stage of this this first switching tube of exciting model calling also controls this first switching tube intermittent conduction or shutoff, and this first switching tube connects input module and output module; This exciting module comprises second switch pipe, RLC oscillating circuit, energy storage circuit and the first resistance, this RLC oscillating circuit connects this input module by this first resistance, this energy storage circuit the first inductance connect in this RLC oscillating circuit also form charging and discharging circuit with this first inductance, the base stage of this second switch pipe can connect this energy storage circuit, and this second switch pipe connects base stage and first resistance of this first switching tube; When this energy storage circuit makes this second switch pipe conducting, this first switching tube turns off; When this energy storage circuit makes this second switch pipe turn off, this first switching tube conducting.
Among one embodiment: this exciting module also comprises a voltage-stabiliser tube, the base stage of this second switch pipe connects this energy storage circuit by this voltage-stabiliser tube.
Among one embodiment: this energy storage circuit is the series circuit of the second resistance and energy storage capacitor, this second resistance is the parallel resistance row of multiple resistance.
Among one embodiment: this energy storage circuit is the series circuit of the second resistance and energy storage capacitor, this energy storage capacitor is the shunt capacitance row of multiple electric capacity.
Among one embodiment: this output module comprises the second inductance, fly-wheel diode and output filter capacitor, this fly-wheel diode can when this first switching tube turns off and this second inductance form and release electric pathway.
Among one embodiment: this input module comprises overcurrent and overvoltage crowbar, rectifier bridge stack and filter circuit, the output of stream and overvoltage crowbar is taken in the input of this rectifier bridge stack, and the output of this rectifier bridge stack connects the input of filter circuit.
Among one embodiment: this input module also comprises freewheeling circuit, the input of this freewheeling circuit connects the output of filter circuit.
Among one embodiment: this input module, the first switching tube and output module can form the power circuit of buck framework, boost framework or buck-boost framework.
Among one embodiment: this first inductance and the second inductance are respectively main winding and the auxiliary winding of transformer.
Among one embodiment: be connected to a protection diode between the base stage of this first switching tube and emitter.
The technical program is compared with background technology, and its tool has the following advantages:
1, this exciting module comprises second switch pipe, RLC oscillating circuit, energy storage circuit and the first resistance, this energy storage circuit the first inductance connect in this RLC oscillating circuit also form charging and discharging circuit with this first inductance, the base stage of this second switch pipe can connect this energy storage circuit, when this energy storage circuit makes this second switch pipe conducting, this first switching tube turns off; When this energy storage circuit makes this second switch pipe turn off, this first switching tube conducting; Adopt the ON-OFF control circuit of discrete component formation to the first switching tube, replace IC and control, cost reduces.
2, this energy storage circuit is the series circuit of the second resistance and energy storage capacitor, this second resistance be multiple resistance parallel resistance row or this energy storage capacitor be multiple electric capacity shunt capacitance row, can components and parts cause in correction circuit power and other parameters discrete by the number suitably adjusting resistance or electric capacity in this resistor chain or electric capacity row, make power and parameter meet required precision.
3, this input module also comprises freewheeling circuit, prevents from causing dimmer to be closed because electric current is extracted in loop during light modulation, thus causes LED lamp to glimmer.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 depicts the circuit diagram of the novel RCC switching power circuit with buck framework.
Fig. 2 depicts the circuit diagram of the novel RCC switching power circuit with buck-boost framework.
Fig. 3 depicts the circuit diagram of the novel RCC switching power circuit with the second resistor chain.
Fig. 4 depicts the circuit diagram of the novel RCC switching power circuit with energy storage capacitor row.
Embodiment
Please refer to Fig. 1 and Fig. 2, novel RCC switching power circuit, can be used for the LED lamp of driving power within 30W, it comprises input module 10, first switching tube 20, output module 30 and exciting module 40, this exciting module 40 connects the base stage of this first switching tube 20 and controls this first switching tube 20 intermittent conduction or shutoff, and this first switching tube 20 connects input module 10 and output module 30;
This input module 10 comprises overcurrent and overvoltage crowbar 11; rectifier bridge stack 12 and filter circuit 13; the output of stream and overvoltage crowbar 11 is taken in the input of this rectifier bridge stack 12; the output of this rectifier bridge stack 12 connects the input of filter circuit 13; this overcurrent and overvoltage crowbar 11 are for being serially connected in the overcurrent insurance resistance of this input module 10 input and being attempted by the overvoltage protection resistance of this input module input, and in the present embodiment, this overvoltage protection resistance adopts piezo-resistance.
This exciting module 40 comprises second switch pipe 41, RLC oscillating circuit 42, energy storage circuit 43, first resistance 44 and voltage-stabiliser tube 45, this RLC oscillating circuit 42 connects this input module 10 by this first resistance 44, this energy storage circuit 43 the first inductance 421 connect in this RLC oscillating circuit 42 also form charging and discharging circuit with this first inductance 421, this energy storage circuit 43 is the series circuit of the second resistance 431 and energy storage capacitor 432, the base stage of this second switch pipe 41 is connected to one end of energy storage capacitor 432 in this energy storage circuit 43 by this voltage-stabiliser tube 45, this second switch pipe 41 connects base stage and first resistance 44 of this first switching tube 20, this first resistance 44 can provide firing current for this first switching tube 20, this exciting module 40 to the control procedure of this first switching tube is: first electric current charges to energy storage capacitor 432 by this second resistance 431, after energy storage capacitor 432 is full of, its terminal voltage be connected with voltage-stabiliser tube 45 can rise, until puncture this voltage-stabiliser tube 45 when reaching the burning voltage of voltage-stabiliser tube 45 and provide base current for this second switch pipe 41, second switch pipe 41 conducting also extracts the base current of the first switching tube 20, first switching tube 20 enters amplification region and enters shutoff district again from saturation region, thus turns off the first switching tube 20, because energy storage capacitor 432 and the first inductance 421 constitute charging and discharging circuit, when energy storage capacitor 432 discharges and its one end voltage drop be connected with voltage-stabiliser tube 45, until be not enough to puncture voltage-stabiliser tube 45, the base current of this second switch pipe 41 is not enough to maintain its conducting, second switch pipe 41 turns off, first switching tube 20 conducting again, so goes round and begins again, and this excitation chain 40 defines the switch control rule effect to the first switching tube 20.In better embodiment, between the base stage and emitter of this second switch pipe 41, connect a filter capacitor 46, to provide smoothing current to the base stage of second switch pipe 41; Between the base stage of this first switching tube 20 and emitter can also and be connected to a protection diode 47, to protect this first switching tube 20.
This input module 10, first switching tube 20 and output module 30 can form the power circuit of buck framework, boost framework or buck-boost framework.This output module 30 comprises the second inductance 31, fly-wheel diode 32 and output filter capacitor 33, this fly-wheel diode 32 can when this first switching tube 20 turns off and this second inductance 31 form and release electric pathway, this output filter capacitor 33 is as making the electric current exporting LED lamp to level and smooth, reduce ripple, these output filter capacitor 33 two ends also and connect a discharge resistance 34, for giving the electric discharge of this filter capacitor; When this first switching tube 20 conducting, input power is powered to LED lamp by this input module 10 and the second inductance 31, simultaneously this second inductance 31 energy storage; When this first switching tube 20 turns off, this second inductance 31 is discharged by the electric pathway of releasing formed with this fly-wheel diode 32 and is powered to LED lamp.In one preferred version, this first inductance 421 and the second inductance 31 are respectively main winding and the auxiliary winding of transformer.
Please refer to Fig. 3 and Fig. 4, because RCC circuit is higher to the conforming requirement of components and parts, this second resistance 431 can be set to the parallel resistance row of multiple resistance or this energy storage capacitor 432 be set to the shunt capacitance row of multiple electric capacity.In being arranged by the resistance number or shunt capacitance adjusting parallel connection in this parallel resistance row, the number of electric capacity can control the turn-on and turn-off frequency of second switch pipe 41, thus control the switching frequency of the first switching tube 20, thus can components and parts cause in correction circuit power and other parameters discrete, make power and parameter meet required precision.Namely when power is less than normal, can reduce resistor chain or electric capacity row in a resistance or electric capacity reach the power with the precision that meets the requirements, make the power consistency of this novel RCC circuit of production better.
In one preferred version, this input module 10 also comprises freewheeling circuit 14, and the input of this freewheeling circuit 14 connects the output of filter circuit 13, and this freewheeling circuit is the series circuit of a resistance and an electric capacity.This freewheeling circuit 14 can prevent this when LED light modulation, causes dimmer to be closed, thus cause LED lamp to glimmer because electric current is extracted in loop.
Novel RCC switching power circuit described in the utility model adopts the ON-OFF control circuit of discrete component formation to the first switching tube, replaces IC and controls, the cost of this power circuit is reduced greatly.Meanwhile, by changing the method for this second resistance or energy storage capacitor, revising the discrete of the power that causes of components and parts and other parameters, making power and parameter meet required precision.
The above, be only the utility model preferred embodiment, therefore the scope that the utility model implements can not be limited according to this, the equivalence namely done according to the utility model the scope of the claims and description change with modify, all should still belong in scope that the utility model contains.
Claims (10)
1. novel RCC switching power circuit, comprise input module, the first switching tube, output module and exciting module, the base stage of this this first switching tube of exciting model calling also controls this first switching tube intermittent conduction or shutoff, and this first switching tube connects input module and output module; It is characterized in that: this exciting module comprises second switch pipe, RLC oscillating circuit, energy storage circuit and the first resistance, this RLC oscillating circuit connects this input module by this first resistance, this energy storage circuit the first inductance connect in this RLC oscillating circuit also form charging and discharging circuit with this first inductance, the base stage of this second switch pipe can connect this energy storage circuit, and this second switch pipe connects base stage and first resistance of this first switching tube; When this energy storage circuit makes this second switch pipe conducting, this first switching tube turns off; When this energy storage circuit makes this second switch pipe turn off, this first switching tube conducting.
2. novel RCC switching power circuit according to claim 1, it is characterized in that: this exciting module also comprises a voltage-stabiliser tube, the base stage of this second switch pipe connects this energy storage circuit by this voltage-stabiliser tube.
3. novel RCC switching power circuit according to claim 1, is characterized in that: this energy storage circuit is the series circuit of the second resistance and energy storage capacitor, and this second resistance is the parallel resistance row of multiple resistance.
4. novel RCC switching power circuit according to claim 1, is characterized in that: this energy storage circuit is the series circuit of the second resistance and energy storage capacitor, and this energy storage capacitor is the shunt capacitance row of multiple electric capacity.
5. novel RCC switching power circuit according to claim 1, it is characterized in that: this output module comprises the second inductance, fly-wheel diode and output filter capacitor, this fly-wheel diode can when this first switching tube turns off and this second inductance form and release electric pathway.
6. novel RCC switching power circuit according to claim 1; it is characterized in that: this input module comprises overcurrent and overvoltage crowbar; rectifier bridge stack and filter circuit; the output of stream and overvoltage crowbar is taken in the input of this rectifier bridge stack, and the output of this rectifier bridge stack connects the input of filter circuit.
7. novel RCC switching power circuit according to claim 3, is characterized in that: this input module also comprises freewheeling circuit, and the input of this freewheeling circuit connects the output of filter circuit.
8. novel RCC switching power circuit according to claim 1, is characterized in that: this input module, the first switching tube and output module can form the power circuit of buck framework, boost framework or buck-boost framework.
9. novel RCC switching power circuit according to claim 1, is characterized in that: this first inductance and the second inductance are respectively main winding and the auxiliary winding of transformer.
10. novel RCC switching power circuit according to claim 1, is characterized in that: be connected to a protection diode between the base stage of this first switching tube and emitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420777079.4U CN204231725U (en) | 2014-12-10 | 2014-12-10 | Novel RCC switching power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420777079.4U CN204231725U (en) | 2014-12-10 | 2014-12-10 | Novel RCC switching power circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204231725U true CN204231725U (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420777079.4U Active CN204231725U (en) | 2014-12-10 | 2014-12-10 | Novel RCC switching power circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105096893A (en) * | 2015-09-09 | 2015-11-25 | 深圳市华星光电技术有限公司 | Drive circuit and liquid crystal display apparatus |
| CN106685187A (en) * | 2015-11-10 | 2017-05-17 | 通用电气照明解决方案有限公司 | Power control circuit |
-
2014
- 2014-12-10 CN CN201420777079.4U patent/CN204231725U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105096893A (en) * | 2015-09-09 | 2015-11-25 | 深圳市华星光电技术有限公司 | Drive circuit and liquid crystal display apparatus |
| CN106685187A (en) * | 2015-11-10 | 2017-05-17 | 通用电气照明解决方案有限公司 | Power control circuit |
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| GR01 | Patent grant |