CN205232536U - LED drive circuit's boost circuit - Google Patents
LED drive circuit's boost circuit Download PDFInfo
- Publication number
- CN205232536U CN205232536U CN201520956412.2U CN201520956412U CN205232536U CN 205232536 U CN205232536 U CN 205232536U CN 201520956412 U CN201520956412 U CN 201520956412U CN 205232536 U CN205232536 U CN 205232536U
- Authority
- CN
- China
- Prior art keywords
- resistance
- oxide
- semiconductor
- boosting
- metal
- 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.)
- Expired - Fee Related
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 14
- 239000004065 semiconductor Substances 0.000 claims description 59
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004146 energy storage Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 230000002459 sustained effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model relates to a TV technique. The utility model discloses a solving the current problem that high -power boost circuit temperature rise is higher and the noise is great, providing a LED drive circuit's boost circuit, its technical scheme can briefly be: a LED drive circuit's boost circuit, includes that first direct current voltage input end, driver chip input, voltage output end, the inductance that steps up, ground resistance, freewheeling diode, energy -storage capacitor, at least two the MOS pipes that step up reach and twice in the resistance of the MOS pipe quantity of stepping up, utilizes connecting in parallel of the MOS pipe that steps up, the heavy current that enables to flow through can flow equalize automatically. The beneficial effects of the utility model are that, realize the rational distribution of electric current, temperature and cost, be applicable to LED drive circuit.
Description
Technical field
The utility model relates to TV tech, particularly the technology of large scale LED flat plate television system backlight drive module.
Background technology
Along with the raising of people's living standard, LED flat plate TV has become family's standard configuration, current LED flat plate TV covers the product line of 29 cun to 85 cun and above size, due to industry standard, the point lamp drive circuit that LED television module uses, the overwhelming majority adopts normal voltage 24V direct current input boosting, but large scale liquid crystal module is due to needs such as its brightness, back of the body lamp power is very large, cause booster circuit difficult design in the back of the body lamp drive circuit of lighting, and there are the problems such as the higher and noise of parts selection, temperature rise in high-power booster circuit.
Utility model content
The purpose of this utility model to solve the problem that current high-power booster circuit temperature rise is higher and noise is larger, provides a kind of booster circuit of LED drive circuit.
The utility model solves its technical problem, the technical scheme adopted is, a kind of booster circuit of LED drive circuit, comprise the first DC voltage input end, driving chip input and voltage output end, it is characterized in that, also comprise boost inductance, earth resistance, fly-wheel diode, storage capacitor, at least two boosting metal-oxide-semiconductors and with the resistance doubling metal-oxide-semiconductor quantity of boosting, described first DC voltage input end is connected by the drain electrode of boost inductance with all boosting metal-oxide-semiconductors, and be connected with the positive pole of fly-wheel diode, the negative pole of fly-wheel diode is connected with the positive pole of storage capacitor, and be connected with voltage output end, the minus earth of storage capacitor, corresponding two resistance of boosting metal-oxide-semiconductor, the grid of each boosting metal-oxide-semiconductor and one end of corresponding with it two resistance connect, the other end of a resistance is connected with driving chip input, the other end of another resistance is connected with the source electrode of this boosting metal-oxide-semiconductor, and be connected with one end of earth resistance, the other end ground connection of earth resistance.
Concrete, comprise two boosting metal-oxide-semiconductors and four resistance, be respectively the first boosting metal-oxide-semiconductor, second boosting metal-oxide-semiconductor, first resistance, second resistance, 3rd resistance and the 4th resistance, the described first boosting grid of metal-oxide-semiconductor is connected with one end of one end of the second resistance and the 3rd resistance, the other end of the second resistance is connected with driving chip input, the other end of the 3rd resistance is connected with the first source electrode boosting metal-oxide-semiconductor, the second boosting grid of metal-oxide-semiconductor is connected with one end of one end of the first resistance and the 4th resistance, the other end of the first resistance is connected with driving chip input, the other end of the 4th resistance is connected with the second source electrode boosting metal-oxide-semiconductor, the source electrode of the first boosting metal-oxide-semiconductor is connected with the second source electrode boosting metal-oxide-semiconductor, and be connected with one end of earth resistance, the other end ground connection of earth resistance.
The beneficial effects of the utility model are, in the utility model scheme, by the booster circuit of above-mentioned LED drive circuit, utilize the parallel connection of boosting metal-oxide-semiconductor, the big current flowed through can be made to be able to automatic current equalizing, realize the reasonable distribution of electric current, temperature and cost, the use needs of high-power LED drive circuit can be met.
Accompanying drawing explanation
Accompanying drawing 1 is the circuit theory diagrams of the booster circuit of a kind of LED drive circuit of the utility model embodiment;
Wherein, V1 is the first DC voltage input end, and V2 is driving chip input, V3 is voltage output end, and L1 is boost inductance, and R1 is the first resistance, R2 is the second resistance, R3 is the 3rd resistance, and R4 is the 4th resistance, and R5 is earth resistance, Q1 is the first boosting metal-oxide-semiconductor, Q2 is the second boosting metal-oxide-semiconductor, and D1 is fly-wheel diode, and C1 is storage capacitor.
Embodiment
Below in conjunction with drawings and Examples, describe the technical solution of the utility model in detail.
The booster circuit of a kind of LED drive circuit of the present utility model, comprise the first DC voltage input end V1, driving chip input V2, voltage output end V3, boost inductance L1, earth resistance R5, sustained diode 1, storage capacitor C1, at least two boosting metal-oxide-semiconductors and with the resistance doubling metal-oxide-semiconductor quantity of boosting, wherein, first DC voltage input end V1 is connected with the drain electrode of all boosting metal-oxide-semiconductors by boost inductance L1, and be connected with the positive pole of sustained diode 1, the negative pole of sustained diode 1 is connected with the positive pole of storage capacitor C1, and be connected with voltage output end V3, the minus earth of storage capacitor C1, corresponding two resistance of boosting metal-oxide-semiconductor, the grid of each boosting metal-oxide-semiconductor and one end of corresponding with it two resistance connect, the other end of a resistance is connected with driving chip input V2, the other end of another resistance is connected with the source electrode of this boosting metal-oxide-semiconductor, and be connected with one end of earth resistance R5, the other end ground connection of earth resistance R5.
Embodiment
The booster circuit of a kind of LED drive circuit of the utility model embodiment, to comprise two boosting metal-oxide-semiconductors and four resistance, first boosting metal-oxide-semiconductor Q1, the second boosting metal-oxide-semiconductor Q2, the first resistance R1, the second resistance R2, the 3rd resistance R3 and the 4th resistance R4 are example, and its circuit theory diagrams as shown in Figure 1.
Wherein, first DC voltage input end V1 is connected by the boost drain electrode of metal-oxide-semiconductor Q1 and the second drain electrode of boosting metal-oxide-semiconductor Q2 of boost inductance L1 and first, and be connected with the positive pole of sustained diode 1, the negative pole of sustained diode 1 is connected with the positive pole of storage capacitor C1, and be connected with voltage output end V3, the minus earth of storage capacitor C1, the grid of the first boosting metal-oxide-semiconductor Q1 is connected with one end of the second resistance R2 and one end of the 3rd resistance R3, the other end of the second resistance R2 is connected with driving chip input V2, the other end of the 3rd resistance R3 is connected with the first source electrode boosting metal-oxide-semiconductor Q1, the grid of the second boosting metal-oxide-semiconductor Q2 is connected with one end of the first resistance R1 and one end of the 4th resistance R4, the other end of the first resistance R1 is connected with driving chip input V2, the other end of the 4th resistance R4 is connected with the second source electrode boosting metal-oxide-semiconductor Q2, the source electrode of the first boosting metal-oxide-semiconductor Q1 is connected with the second source electrode boosting metal-oxide-semiconductor Q2, and be connected with one end of earth resistance R5, the other end ground connection of earth resistance R5.
During work, there is provided control signal (namely by driving chip input V2) to control the break-make of the first boosting metal-oxide-semiconductor Q1 and second boosting metal-oxide-semiconductor Q2 in parallel by LED drive chip simultaneously, and then control storage and the release of boost inductance L1 energy, in conjunction with the energy-storage function of storage capacitor C1, finally realize the lifting of output voltage.Raise and the characteristic of increase with temperature according to the internal resistance of boosting metal-oxide-semiconductor, the electric current increase of the first boosting metal-oxide-semiconductor Q1 or second boosting metal-oxide-semiconductor Q2 in using if in parallel, cause temperature to raise, then its conducting resistance can increase.The increase of resistance can cause again it to flow through electric current reduction.The reduction of electric current can make again the heating of boosting metal-oxide-semiconductor reduce, and temperature also just declines naturally.So the parallel connection of the first boosting metal-oxide-semiconductor Q1 and second boosting metal-oxide-semiconductor Q2 uses, the big current flow through in circuit can be used to be able to automatic current equalizing, to realize the reasonable distribution of electric current, temperature, cost, the use needs of high-power LED drive circuit can be met; In like manner, also parallel connection more can to boost metal-oxide-semiconductor, increase corresponding resistance simultaneously.
Claims (2)
1. the booster circuit of a LED drive circuit, comprise the first DC voltage input end, driving chip input and voltage output end, it is characterized in that, also comprise boost inductance, earth resistance, fly-wheel diode, storage capacitor, at least two boosting metal-oxide-semiconductors and with the resistance doubling metal-oxide-semiconductor quantity of boosting, described first DC voltage input end is connected by the drain electrode of boost inductance with all boosting metal-oxide-semiconductors, and be connected with the positive pole of fly-wheel diode, the negative pole of fly-wheel diode is connected with the positive pole of storage capacitor, and be connected with voltage output end, the minus earth of storage capacitor, corresponding two resistance of boosting metal-oxide-semiconductor, the grid of each boosting metal-oxide-semiconductor and one end of corresponding with it two resistance connect, the other end of a resistance is connected with driving chip input, the other end of another resistance is connected with the source electrode of this boosting metal-oxide-semiconductor, and be connected with one end of earth resistance, the other end ground connection of earth resistance.
2. the booster circuit of a kind of LED drive circuit as claimed in claim 1, it is characterized in that, comprise two boosting metal-oxide-semiconductors and four resistance, be respectively the first boosting metal-oxide-semiconductor, second boosting metal-oxide-semiconductor, first resistance, second resistance, 3rd resistance and the 4th resistance, the described first boosting grid of metal-oxide-semiconductor is connected with one end of one end of the second resistance and the 3rd resistance, the other end of the second resistance is connected with driving chip input, the other end of the 3rd resistance is connected with the first source electrode boosting metal-oxide-semiconductor, the second boosting grid of metal-oxide-semiconductor is connected with one end of one end of the first resistance and the 4th resistance, the other end of the first resistance is connected with driving chip input, the other end of the 4th resistance is connected with the second source electrode boosting metal-oxide-semiconductor, the source electrode of the first boosting metal-oxide-semiconductor is connected with the second source electrode boosting metal-oxide-semiconductor, and be connected with one end of earth resistance, the other end ground connection of earth resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520956412.2U CN205232536U (en) | 2015-11-26 | 2015-11-26 | LED drive circuit's boost circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520956412.2U CN205232536U (en) | 2015-11-26 | 2015-11-26 | LED drive circuit's boost circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205232536U true CN205232536U (en) | 2016-05-11 |
Family
ID=55907573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520956412.2U Expired - Fee Related CN205232536U (en) | 2015-11-26 | 2015-11-26 | LED drive circuit's boost circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205232536U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110798068A (en) * | 2019-11-26 | 2020-02-14 | 深圳飞安瑞科技股份有限公司 | Boosting circuit of CPU direct drive MOS tube |
-
2015
- 2015-11-26 CN CN201520956412.2U patent/CN205232536U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110798068A (en) * | 2019-11-26 | 2020-02-14 | 深圳飞安瑞科技股份有限公司 | Boosting circuit of CPU direct drive MOS tube |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103198799B (en) | Backlight drive board and liquid crystal display | |
| CN202189537U (en) | Boost circuit used for LED backlight drive circuit | |
| CN103871371A (en) | LED (light-emitting diode) backlight driving circuit, backlight module and liquid crystal display device | |
| CN205232537U (en) | LED drive circuit's boost circuit | |
| CN205232536U (en) | LED drive circuit's boost circuit | |
| CN206775772U (en) | Linear full voltage LED drive circuit | |
| CN203055409U (en) | Led backlight drive circuit and liquid crystal display device | |
| CN102761258B (en) | Booster circuit and its control method | |
| CN103531147B (en) | LED drive circuit and use the LED drive system of this driving circuit | |
| CN208834723U (en) | Multi-channel LED backlight drive circuit and LCD TV | |
| CN103944384A (en) | Coupling inductance high-gain active network boost converter | |
| CN204031528U (en) | A kind of energy-conservation driving circuit of high-power LED lamp | |
| CN201830140U (en) | BOOST drive circuit, drive device and LED (light emitting diode) liquid crystal module | |
| CN205451749U (en) | Backlight drive circuit and television | |
| CN203691696U (en) | Bridgeless LED drive circuit | |
| CN103001498A (en) | Backlight-driven direct-current booster topology circuit | |
| CN203788144U (en) | Multipath interlaced parallel phase-shaft bidirectional CUK converter | |
| CN203912244U (en) | An LED array illuminating lamp drive circuit | |
| CN203537238U (en) | Interleaved parallel working DC buck circuit | |
| CN202663296U (en) | Boost converter suitable for low-voltage lamp string load connection | |
| CN104393782A (en) | Single-phase inverter used for high-voltage DC and switching circuit | |
| CN203590541U (en) | LED driving circuit and LED driving system using same | |
| CN201937934U (en) | Ultraviolet lamp driving circuit | |
| CN203618187U (en) | Boosted circuit of constant current boosted power source of LED energy-saving lamp | |
| CN204598368U (en) | A kind of LED logic light adjusting circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160511 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |