CN202435654U - LED driving IC chip - Google Patents
LED driving IC chip Download PDFInfo
- Publication number
- CN202435654U CN202435654U CN2011205150416U CN201120515041U CN202435654U CN 202435654 U CN202435654 U CN 202435654U CN 2011205150416 U CN2011205150416 U CN 2011205150416U CN 201120515041 U CN201120515041 U CN 201120515041U CN 202435654 U CN202435654 U CN 202435654U
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- CN
- China
- Prior art keywords
- power device
- circuit
- chip
- ldmos
- signal generator
- 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
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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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- Dc-Dc Converters (AREA)
- Led Devices (AREA)
Abstract
An LED driving IC chip relates to the integrated circuit technology. A 700V floating LDMOS (Laterally Diffused Metal Oxide Semiconductor) power device, a linear regulator, a Toff turn-off timer, a DIM dimming controller, a PWM (Pulse-Width Modulation) signal generator, a DRV power tube driver module, a low-voltage power device, a grid electrode setting circuit for an external high-voltage power device and a protective circuit are integrated in the chip, wherein the linear regulator (1) is connected with the output terminal of the 700V floating LDMOS power device; the Toff turn-off timer, the DIM dimming controller and the protective circuit are connected with the PWM signal generator; the PWM signal generator is connected with the grid electrode of the low-voltage power device through the DRV power tube driver module; and the grid electrode of the 700V floating LDMOS power device is connected with the grid electrode setting circuit, and the output terminal of the 700V floating LDMOS power device is connected with the input terminal of the low-voltage power device. The LED driving IC chip adopting the innovatory framework can work stably and reliably within the 85VAC-265VAC universal AC input range and ensures high efficiency of a system.
Description
Technical field
The utility model relates to integrated circuit technique.
Background technology
High pressure step-down LED drive controlling chip be meant can be in the general interchange input range of 85VAC～265VAC direct one type of LED drive IC of reliable and stable, the efficiency operation of driving LED.Because usually be used for the drive controlling of illumination LED, electric current is often all bigger.The various drive circuits of prior art exist overall cost height, the complicated defective of peripheral circuit.
The utility model content
The utility model technical problem to be solved is that a kind of LED chip for driving that can adapt to the input voltage range from 18V to 450V is provided.
The technical scheme that the utility model solve the technical problem employing is; The LED driving IC chip; It is characterized in that; The unsteady LDMOS power device of integrated 700V, regulator linear regulator, Toff turn-off time timer, DIM light adjusting controller, pwm signal generator, DRV power tube driver module, low voltage power devices, the grid setting circuit of external high pressure power device, protective circuit in the chip, regulator linear regulator (1) is connected with the output of the unsteady LDMOS power device of 700V; Toff turn-off time timer, DIM light adjusting controller, protective circuit are connected with the pwm signal generator; The pwm signal generator connects the grid of low voltage power devices through DRV power tube driver module; The grid of the unsteady LDMOS power device of 700V is connected with the grid setting circuit, and output is connected with the input of low voltage power devices.
Said protective circuit comprises load open circuit short-circuit protection circuit, current foldback circuit and thermal-shutdown circuit.
The utility model can adapt to the input voltage range from 18V to 450V.The utility model adopts the framework of innovation, and can be implemented in the general interchange input range of 85VAC～265VAC can reliable and stable work, and the system of assurance is high-effect.The built-in 700V of the utility model LDMOS power device that floats, in driving LED simultaneously, for IC provides working power.The LED electric current is set through non-essential resistance.Through multi-functional light modulation DIM pin, can use resistance or dc voltage linear regulation LED electric current, also can use digital pulse signal to carry out the PWM light modulation.The utlity model has the kinds of protect function, comprise the load short circuits protection, open-circuit-protection, overcurrent protection, overheat protector.
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Description of drawings
Fig. 1 is the utility model electrical block diagram.Square boundary is represented the chip that encapsulates among the figure, and solid black round dot is represented pin on it.
Embodiment
Referring to Fig. 1.
The overall plan of the utility model is made up of single chip LED drive IC and peripheral circuit thereof.The single chip LED drive IC is made up of grid setting circuit 7, load open circuit short-circuit protection circuit, current foldback circuit and the thermal-shutdown circuit 8 of the unsteady LDMOS power device 17 of built-in 700V, regulator linear regulator 1, Toff turn-off time timer 2, DIM light adjusting controller 3, pwm signal generator 4, DRV power tube driver module 5, low voltage power devices 6, external high pressure power device.Peripheral circuit is made up of the full bridge rectifier 12 of standard, the BUCK reduction voltage circuit 13,14,15,16 and the sampling resistor 18 of high pressure input.
The unsteady LDMOS power device 17 of integrated 700V, regulator linear regulator 1, Toff turn-off time timer 2, DIM light adjusting controller 3, pwm signal generator 4, DRV power tube driver module 5, low voltage power devices 6, the grid setting circuit 7 of external high pressure power device, protective circuit 8 in the LED driving IC chip, regulator linear regulator 1 is connected with the output of the unsteady LDMOS power device 17 of 700V; Toff turn-off time timer 2, DIM light adjusting controller 3, protective circuit 8 are connected with pwm signal generator 4; Pwm signal generator 4 connects the grid of low voltage power devices 6 through DRV power tube driver module 5; The grid of the unsteady LDMOS power device 17 of 700V is connected with grid setting circuit 7, and output is connected with the input of low voltage power devices 6.Said protective circuit 8 comprises load open circuit short-circuit protection circuit, current foldback circuit and thermal-shutdown circuit.
The IC of the utility model is inner integrated high voltage power device 17 has been simplified the number of devices of peripheral circuit, has reduced application cost.The inner integrated high voltage power device 17 of IC is the LDMOS that float; Because high voltage power device 17 is except driving outside high bright LED string 14; Also to power supply be provided for this IC; Promptly as the input of regulator linear regulator 1, this floating voltage that just requires LDMOS is at least greater than the supply voltage VDD of this IC, and external capacitive 19 has guaranteed that supply voltage VDD's is stable.High voltage power device 17 be can withstand voltage 700V LDMOS, can guarantee can bear possible big voltage when this device turn-offs.The architectural characteristic that high voltage power device 17 should have is that its reverse blocking voltage (BVds) can reach 700V; According to the conducting resistance of chip power output size selection power tube, can realize the optimum compromise of chip power-consumption and power output; The self-isolation device, can with the effective integration of mesolow device together, technology simple (single chip integrated requirement).
Specification has proved absolutely the principle and the necessary technology content of the utility model; Those of ordinary skill can be implemented the utility model according to specification; The element circuit that the utility model adopts is all ripe prior art, so more concrete ins and outs such as the element circuit internal structures that for example repeats no more.
Claims (2)
1.LED driving IC chip; It is characterized in that; The unsteady LDMOS power device (17) of integrated 700V, regulator linear regulator (1), Toff turn-off time timer (2), DIM light adjusting controller (3), pwm signal generator (4), DRV power tube driver module (5), low voltage power devices (6), the grid setting circuit (7) of external high pressure power device, protective circuit (8) in the chip, regulator linear regulator (1) is connected with the output of the unsteady LDMOS power device (17) of 700V; Toff turn-off time timer (2), DIM light adjusting controller (3), protective circuit (8) are connected with pwm signal generator (4); Pwm signal generator (4) connects the grid of low voltage power devices (6) through DRV power tube driver module (5); The grid of the unsteady LDMOS power device (17) of 700V is connected with grid setting circuit (7), and output is connected with the input of low voltage power devices (6).
2. LED driving IC chip as claimed in claim 1 is characterized in that, said protective circuit (8) comprises load open circuit short-circuit protection circuit, current foldback circuit and thermal-shutdown circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205150416U CN202435654U (en) | 2010-12-13 | 2011-12-11 | LED driving IC chip |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010585459.4 | 2010-12-13 | ||
| CN201010585459 | 2010-12-13 | ||
| CN2011205150416U CN202435654U (en) | 2010-12-13 | 2011-12-11 | LED driving IC chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202435654U true CN202435654U (en) | 2012-09-12 |
Family
ID=46294409
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104114169A Pending CN102523651A (en) | 2010-12-13 | 2011-12-11 | LED-driven IC chip |
| CN2011205150416U Expired - Fee Related CN202435654U (en) | 2010-12-13 | 2011-12-11 | LED driving IC chip |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104114169A Pending CN102523651A (en) | 2010-12-13 | 2011-12-11 | LED-driven IC chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN102523651A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102523651A (en) * | 2010-12-13 | 2012-06-27 | 成都成电硅海科技股份有限公司 | LED-driven IC chip |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106604479B (en) * | 2017-01-23 | 2017-12-29 | 无锡恒芯微科技有限公司 | The non-isolated LED light adjusting circuits dimmed with PWM and direct current |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100774884B1 (en) * | 2006-02-22 | 2007-11-09 | 성호전자(주) | Device of driving LED with pulse width modulation |
| US7288902B1 (en) * | 2007-03-12 | 2007-10-30 | Cirrus Logic, Inc. | Color variations in a dimmable lighting device with stable color temperature light sources |
| US7642733B2 (en) * | 2008-05-19 | 2010-01-05 | Leadtrend Technology Corp. | Driving circuit for light emitting device with compensation mechanism and driving method thereof |
| CN201388313Y (en) * | 2009-04-17 | 2010-01-20 | 上海晶丰明源半导体有限公司 | High-efficiency constant-current LED driving circuit |
| CN102523651A (en) * | 2010-12-13 | 2012-06-27 | 成都成电硅海科技股份有限公司 | LED-driven IC chip |
-
2011
- 2011-12-11 CN CN2011104114169A patent/CN102523651A/en active Pending
- 2011-12-11 CN CN2011205150416U patent/CN202435654U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102523651A (en) * | 2010-12-13 | 2012-06-27 | 成都成电硅海科技股份有限公司 | LED-driven IC chip |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102523651A (en) | 2012-06-27 |
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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: 20120912 Termination date: 20151211 |
|
| EXPY | Termination of patent right or utility model |