CN201860488U - MOS (metal oxide semiconductor) tube drive circuit used in automobile LED (light-emitting diode) lighting circuit - Google Patents
MOS (metal oxide semiconductor) tube drive circuit used in automobile LED (light-emitting diode) lighting circuit Download PDFInfo
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- CN201860488U CN201860488U CN 201020570567 CN201020570567U CN201860488U CN 201860488 U CN201860488 U CN 201860488U CN 201020570567 CN201020570567 CN 201020570567 CN 201020570567 U CN201020570567 U CN 201020570567U CN 201860488 U CN201860488 U CN 201860488U
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Abstract
The utility model relates to an MOS (metal oxide semiconductor) tube drive circuit used in an automobile LED (light-emitting diode) lighting circuit, which belongs to the field of electronic technique and comprises an MOS tube Q2, a power supply input end Vin and a power supply output end Vout, divider resistors R1 and R2, an FWD (fly-wheel diode) D1, a bootstrap capacitor C1, a triode Q1 and a pull-up resister R3; and a driving method is as follows: a bootstrap boost circuit is designed mainly by utilizing the principle that voltage of two ends of the bootstrap capacitor C1 can not jump, the MOS tube is switched on and off fast by utilizing the performance of the triode Q1 and the FWD D1. The MOS tube can work in a state of complete switch-on or switch-off without utilizing a special MOS tube driving chip, so that the circuit is simple and the cost is low.
Description
Technical field
The utility model relates to electronic technology field, relates to a kind of metal-oxide-semiconductor drive circuit that is used for the automobile LED lighting circuit, the drive circuit of the metal-oxide-semiconductor during particularly a kind of switch adjustable type LED that is applicable to that automobile LED throws light on drives.
Background technology
LED has that response speed is fast, low-power consumption, energy-conservation, remarkable advantage such as the life-span is long.Owing to the rapid response speed of LED, be specially adapted to the application of automobile brake lamp and direction indicator lamp, can reduce the probability of happening of traffic accidents such as rear-end collision.Led light source has been widely used in the automotive lighting field.The LED Driving technique is also progressively developed along with the development of LED application technology.
Therefore LED is a kind of along with the variation by the LED current value changes the well-illuminated light emitting source of light, and LED is luminous constant if desired, and the current value of then must control flows crossing LED is constant.Usually the LED that is adopted drives the constant current method linear adjustable type and two kinds of methods of switch adjustable type.The core technology of linear regulation formula is to utilize the switching tube that works in the range of linearity to come control load as a dynamic adjustable resistance, to guarantee under the situation that input voltage changes, the power consumption that the switching tube load is different, thus the electric current that flows through the LED load is remained unchanged substantially.But this Driving technique not only is subjected to the restriction of input voltage range, and loss is very big, and efficient is very low, causes the heating problem of circuit board serious.And the switch adjustable type is that efficient is higher in the energy conversion, can reach more than 90% under the perfect condition.The core of this Driving technique is between the switching tube with quick break-make places input and exports, by regulating the mean value that break-make ratio (being duty ratio) is controlled output dc voltage, this average voltage is made of the square-wave pulse of adjustable-width, and the mean value of square-wave pulse is exactly VD.With the LC filter square-wave pulse is smoothed to the output of ripple-free direct current, its value equals the mean value of square-wave pulse.Whole switching circuit adopts negative feedback, and by detecting output voltage and controlling duty ratio in conjunction with negative feedback, regulated output voltage is not subjected to the influence of input voltage and load variations.At present, the switch adjustable type circuit of buck (BUCK), boost type (BOOST), step-down/up type (BUCK-BOOST) is widely used in domestic lighting and automotive lighting.
Buck (BUCK) circuit, be applicable to that output voltage is lower than the occasion of input voltage, though the gate-drive of switch can not become bigger problem, when difficulty is driving N-metal-oxide-semiconductor, gate voltage is at least than the high 5V of input voltage, or more likely is to exceed 10V.But produce the voltage higher if desired, just need select metal-oxide-semiconductor for use, like this as long as just can open the gate pole level with moving to than input.But circuit topological structure at buck circuit, some do not have the PWM modulation chip of metal-oxide-semiconductor driving force can't the driven MOS pipe, if only use pull-up resistor to go to control the conducting of metal-oxide-semiconductor and end simply, can't make metal-oxide-semiconductor reach conducting completely and cut-off state, the switch abnormal condition of metal-oxide-semiconductor can influence the operate as normal of whole LED drive circuit.A universal method that drives gate pole is the MOSFET special driving chip, but special-purpose MOSFET chip for driving price is higher relatively, does not have universality, can't promote on a large scale.
At number of patent application is in the Chinese patent open source literature of " 200710044259.6 ", disclose a kind of P type power MOS switch tube drive circuit, between the source electrode of P type power MOS switch tube and grid, be connected with a push-pull driver circuit and a unsteady bleeder circuit.The transient current that push-pull driver circuit is produced when utilizing triode Q1 standing grain FIQ2 alternately to open mutually discharges and recharges control fast to the parasitic capacitance of P type power MOS pipe inside; The bleeder circuit that floats provides a stable negative pulse gate source voltage value for P type power MOS pipe.Thereby improve the dynamic characteristic of P power MOS pipe, reduce its switching loss.But its complete conducting of P type power MOS pipe now or end.
The utility model content
The technical problems to be solved in the utility model is: a kind of metal-oxide-semiconductor drive circuit that is used for the automobile LED lighting circuit is provided, it does not need to utilize special metal-oxide-semiconductor chip for driving, can realize the state that metal-oxide-semiconductor is operated in complete conducting or ends, its circuit is simple, and is with low cost.
In order to solve the problems of the technologies described above, the utility model provides a kind of metal-oxide-semiconductor drive circuit that is used for the automobile LED lighting circuit, comprise metal-oxide-semiconductor Q2, pwm chip, power input Vin and power output end Vout, current limliting module, division module 2 and 3, unidirectional afterflow module, charging module and switch module; After the grid of power input Vin process metal-oxide-semiconductor Q2, the division module between source electrode 3, by being connected to the OUT output of pwm chip after division module 2 and the series connection of current limliting module; One of charging module terminates between current limliting module, the division module 2, and its other end is connected with switch module with the negative pole of described unidirectional afterflow module, and the positive pole of described unidirectional afterflow module is connected with the grid of division module 2 one ends and metal-oxide-semiconductor Q2; One end of described division module 3 is connected with the source electrode of described switch module one end and metal-oxide-semiconductor Q2, is connected with power input Vin simultaneously, and the other end of described division module 3 is connected with the grid of the other end of described switch module with metal-oxide-semiconductor Q2; The drain electrode of described metal-oxide-semiconductor Q2 is connected with power output end Vout.
According to the metal-oxide-semiconductor drive circuit that is used for the automobile LED lighting circuit described in the utility model, be preferably, described switch module is a triode.
According to the metal-oxide-semiconductor drive circuit that is used for the automobile LED lighting circuit described in the utility model, be preferably, described charging module is an electric capacity.
The metal-oxide-semiconductor drive circuit that is used for the automobile LED lighting circuit described in the utility model, it does not need to utilize special metal-oxide-semiconductor chip for driving, can realize the state that metal-oxide-semiconductor is operated in complete conducting or ends, and its circuit is simple, and is with low cost.
Description of drawings
Fig. 1 is the circuit theory diagrams that are used for the metal-oxide-semiconductor drive circuit of automobile LED lighting circuit described in the utility model.
Embodiment
Below, for a more detailed description to the utility model in conjunction with the accompanying drawings with embodiment.Present embodiment only is the description to the utility model preferred forms, scope of the present utility model is not had any restriction.
Embodiment
As shown in Figure 1, be the circuit theory diagrams that are used for the metal-oxide-semiconductor drive circuit of automobile LED lighting circuit described in the utility model.The described metal-oxide-semiconductor drive circuit that is used for the automobile LED lighting circuit comprises metal-oxide-semiconductor Q2, pwm chip, power input Vin and power output end Vout, current limliting module 1, division module 2,3, unidirectional afterflow module 4, charging module 5 and switch module 6; After the grid of power input Vin process metal-oxide-semiconductor Q2, the division module between source electrode 3, by being connected to the OUT output of pwm chip after division module 2 and 1 series connection of current limliting module; One of charging module 5 terminates between current limliting module 1, the division module 2, and its other end is connected with switch module 6 with the negative pole of described unidirectional afterflow module 4, and the positive pole of described unidirectional afterflow module 4 is connected with the grid of division module 2 one ends and metal-oxide-semiconductor Q2; One end of described division module 3 is connected with the source electrode of described switch module 6 one ends and metal-oxide-semiconductor Q2, is connected with power input Vin simultaneously, and the other end of described division module 3 is connected with the other end of described switch module 6 and the grid of metal-oxide-semiconductor Q2; The drain electrode of described metal-oxide-semiconductor Q2 is connected with power output end Vout.
Preferably, described switch module 6 can be triode, and described charging module 5 can be electric capacity.
What wherein, described pwm chip was common has: TL494, TL594, TL5001, UC1842, UC1843, UC1844, UC2842, UC2843, UC2844, UC3842, UC3843, UC3844 etc.The pin information of these pwm chips and other detail files can be introduced data by the chip of each chip manufacturer and obtain, and can obtain when buying chip or can get access to each chip data by each manufacturer website.
The metal-oxide-semiconductor drive circuit that is used for the automobile LED lighting circuit described in the utility model, it does not need to utilize special metal-oxide-semiconductor chip for driving, can realize the state that metal-oxide-semiconductor is operated in complete conducting or ends, and its circuit is simple, and is with low cost.
The metal-oxide-semiconductor drive circuit that is used for the automobile LED lighting circuit described in the utility model, and describe embodiment of the present utility model and effect with reference to the accompanying drawings.Above said content only is the basic explanation under the utility model design; rather than to restriction of the present utility model; any utility model that does not exceed in the utility model connotation scope is created; i.e. any equivalent transformation of doing according to the technical solution of the utility model; comprise to circuit form the modification of mode, to the change of circuit layout structure; as the type or the model of replacing the components and parts in the utility model; and the replacement of other unsubstantialities or modification etc., all should belong to protection range of the present utility model.
Claims (3)
1. a metal-oxide-semiconductor drive circuit that is used for the automobile LED lighting circuit comprises metal-oxide-semiconductor Q2, pwm chip, power input Vin and power output end Vout, it is characterized in that:
The described metal-oxide-semiconductor drive circuit that is used for the automobile LED lighting circuit also comprises current limliting module (1), division module (2,3), unidirectional afterflow module (4), charging module (5) and switch module (6);
After the grid of power input Vin process metal-oxide-semiconductor Q2, the division module between source electrode (3), by being connected to the OUT output of pwm chip after division module (2) and current limliting module (1) series connection;
One of charging module (5) terminates between current limliting module (1), the division module (2), its other end is connected with switch module (6) with the negative pole of described unidirectional afterflow module (4), and the positive pole of described unidirectional afterflow module (4) is connected with the grid of division module (2) one ends and metal-oxide-semiconductor Q2;
One end of described division module (3) is connected with the source electrode of described switch module (6) one ends and metal-oxide-semiconductor Q2, be connected with power input Vin simultaneously, the other end of described division module (3) is connected with the other end of described switch module (6) and the grid of metal-oxide-semiconductor Q2;
The drain electrode of described metal-oxide-semiconductor Q2 is connected with power output end Vout.
2. the metal-oxide-semiconductor drive circuit that is used for the automobile LED lighting circuit according to claim 1 is characterized in that: described switch module (6) is a triode.
3. the metal-oxide-semiconductor drive circuit that is used for the automobile LED lighting circuit according to claim 1 and 2 is characterized in that: described charging module (5) is an electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020570567 CN201860488U (en) | 2010-10-21 | 2010-10-21 | MOS (metal oxide semiconductor) tube drive circuit used in automobile LED (light-emitting diode) lighting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020570567 CN201860488U (en) | 2010-10-21 | 2010-10-21 | MOS (metal oxide semiconductor) tube drive circuit used in automobile LED (light-emitting diode) lighting circuit |
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| Publication Number | Publication Date |
|---|---|
| CN201860488U true CN201860488U (en) | 2011-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020570567 Expired - Lifetime CN201860488U (en) | 2010-10-21 | 2010-10-21 | MOS (metal oxide semiconductor) tube drive circuit used in automobile LED (light-emitting diode) lighting circuit |
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| CN (1) | CN201860488U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104853466A (en) * | 2014-11-25 | 2015-08-19 | 成都冠深科技有限公司 | Light beam excitation type constant-current pulse lift raft energy-saving system based on gate driving |
-
2010
- 2010-10-21 CN CN 201020570567 patent/CN201860488U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104853466A (en) * | 2014-11-25 | 2015-08-19 | 成都冠深科技有限公司 | Light beam excitation type constant-current pulse lift raft energy-saving system based on gate driving |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201800 Yecheng Road, Jiading District, Jiading District, Shanghai Patentee after: Hua Yu vision technology (Shanghai) Co., Ltd. Address before: 201800 Yecheng Road, Jiading District, Jiading District, Shanghai Patentee before: Xiaoxi Car Lights Co., Ltd., Shanghai |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110608 |