CN202334993U - Multi-functional LED (Light Emitting Diode) lamp drive circuit - Google Patents
Multi-functional LED (Light Emitting Diode) lamp drive circuit Download PDFInfo
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- CN202334993U CN202334993U CN2011203762812U CN201120376281U CN202334993U CN 202334993 U CN202334993 U CN 202334993U CN 2011203762812 U CN2011203762812 U CN 2011203762812U CN 201120376281 U CN201120376281 U CN 201120376281U CN 202334993 U CN202334993 U CN 202334993U
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- drive circuit
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- led lamp
- modular converter
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Abstract
The utility model relates to a multi-functional LED lamp drive circuit, which comprises a constant-current drive transforming module (3) and a plurality of LED lamps connected in series with the output end of the constant-current drive transforming module, and further comprises a capacitor and a controlled silicon corresponding to any LED lamp one by one and connected in parallel with the LED lamps; and corresponding backward diodes of which the breakdown voltage is smaller than the working voltage of the LED lamp are connected in series between a control end of any controlled silicon and an anode of the corresponding LED lamp. The drive circuit can prevent generation of quite high output voltage during no load, simultaneously has reset function and also meets the needs of active or passive light modulators.
Description
Technical field
The utility model relates to light-emitting diode (LED) drive circuit, is specifically related to a kind of Multifunctional LED lamp drive circuit.
Background technology
The constant current LED driving power source of being sold on the market at present generally all is single channel output or multi-channel parallel output, and output port can produce very high output voltage when unloaded, brings potential safety hazard to device; The utility model circuit adopts multiport output; What internal circuit adopted is series connection control, and outside port adopts and connect the lamp mode, and each port when open circuit output voltage less than 1V; Each paths of LEDs lamp of external output port open circuit or when non-loaded; Do not influence other LED lamp operate as normal, and in the entire circuit composition, active or passive light adjusting circuit of 0-10V and output port reset function circuit are arranged.
The utility model content
The utility model technical issues that need to address are, how a kind of Multifunctional LED lamp drive circuit is provided, and can when zero load, avoid producing very high output voltage, further have reset function.
The above-mentioned technical problem of the utility model solves like this: make up a kind of Multifunctional LED lamp drive circuit, comprise several LED lamps of constant-current driving modular converter and output thereof serial connection, also comprise electric capacity and the controllable silicon corresponding and parallel with one another one by one with arbitrary LED lamp; The series connection puncture voltage is less than the corresponding separately backward diode of LED light working voltage between the anode of the corresponding LED lamp with it of arbitrary said silicon controlled control end.
According to the drive circuit that the utility model provides, also comprise the reset switch that is used to control this module output that is electrically connected with said constant-current driving modular converter.
According to the drive circuit that the utility model provides, said constant-current driving modular converter comprises inductance and controls the constant-current driven chip of this inductance output.
According to the drive circuit that the utility model provides, said constant-current driving modular converter also comprises the resistance that is used for current detecting that is electrically connected with said constant-current driven chip.
The drive circuit that provides according to the utility model; Also comprise the voltage input module that is electrically connected with said constant-current driving modular converter, this voltage input module comprises the filter capacitor between the negative electrode of the forward diode that connects the power supply positive input terminal and power-input and said forward diode.
According to the drive circuit that the utility model provides, also comprise the light modulation input module that is electrically connected with said constant-current driving modular converter.
According to the drive circuit that the utility model provides, said light modulation input module is active or passive light-adjusting module.
According to the drive circuit that the utility model provides, said light modulation input module comprises triode and electric resistance partial pressure unit, and the base stage of said triode is connected with the dividing potential drop output of said electric resistance partial pressure unit.
The Multifunctional LED lamp drive circuit that the utility model provides according to active and passive dimmer different control principles, utilizes after the input voltage multistage dividing potential drop, obtains the voltage of difference.After wherein the joining of R1 and R2 draws the light modulation required voltage and supplies passive dimmer work or active dimmer to drag down this point voltage; Make resistance R 2 and R3 summing point voltage while step-down; To realize brightness adjustment control, wherein triode Q1 is that the form of voltage follower is controlled constant-current driven chip U1A light modulation end; Output has adopted LED open circuit identification control; Effectively avoided other being inserted the influence of LED series loop when damaging the LED open circuit or not inserting LED; Cause that the situation that the LED lamp does not work occurs, wherein can also give the power supply of LED lamp load again through reset switch S1 to power reset.
Description of drawings
Further the utility model is elaborated below in conjunction with accompanying drawing and specific embodiment.
Fig. 1 is the utility model circuit theory sketch map.
Embodiment
Below, adopting the constant-current driven chip of the PT4115 model of China Resources silicon prestige company with constant-current driven chip is that example describes:
At first, the utility model thinking is described:
As shown in Figure 1; Multifunctional LED driver according to the PT4115 design; Constant-current driven chip U1A is PT4115 model chip and inductance L 1 in input employing diode D1 and capacitor C 1 composition voltage input module, diode D2, and resistance R 4 is formed the constant-current driving modular converters with capacitor C 2.Triode Q1, resistance R 1, R2 and R3 constitute the light modulation input module, are used for the dimmer voltage conversion.S1 is a reset switch, and when S1 was closed, constant-current driven chip PT4115 can quit work, the led drive circuit no-output.Controllable silicon Q2～Q5, backward diode D3～D6 and capacitor C 3～C6 form output control circuit.
The second, further specify the method for work and the principle of the utility model specific embodiment circuit:
1, the voltage input module 1: with the diode D1 that forward connects, be used for the input and output isolation and prevent to import electric power polarity connecing instead, wherein capacitor C 1 is used to import power filter;
2, light modulation input module 2 (active or passive dimmer): adopt resistance R 1, R2 and R3 to input 24V DC power supply dividing potential drop; The dividing potential drop that R1 and R2 intersect intersection point approximately is 10-11V; With passive dimmer for light control the time; This point voltage can be for the operating voltage of passive dimmer, and the joining of R2 and R3 approximately is 2.5-2.6V, and is just identical with the required maximum dimmer voltage of constant-current driven chip U1A light modulation pin; Wherein triode Q1 is operated in the voltage follow pattern, and the emitter voltage of triode Q1 is followed base voltage and changed and change, and realizes that finally constant-current driven chip U1A light modulation pin voltage changes the realization light modulation;
3, the constant-current driving modular converter 3: constant-current driven chip U1A carries out switch transition; Supplying with constant-current driven chip U1A inside behind 4 pairs of current samplings of resistance R detects; And according to switch conduction time of this size of current control constant-current driven chip U1A internal switch pipe; Thereby on inductance L 1, obtain constant electric current, also make whole loop current also constant;
4, reseting module 4: reset switch S1; Because controllable silicon is adopted in output; Need remove the voltage that adds on the controllable silicon behind the load open circuit or after the controllable silicon conducting and just can recover not on-state, when reset switch S1 was closed, constant-current driven chip U1A can quit work; Output is with no-voltage, and controllable silicon is able to reset;
5, output control module 5: adopt a plurality of port outputs at output, and add like controllable silicon Q2 the interlock circuit of backward diode D3 and capacitor C 3 at each port; When being implemented in LED1 lamp port open or not connecing lamp; Because being input voltage, the maximum output voltage of port deducts the voltage after the pressure drop of element in the loop; The highest puncture of setting backward diode D3 triggers controllable silicon Q2 conducting less than open circuit voltage so backward diode D3 punctures to power up to controllable silicon Q2, because of controllable silicon Q2 conducting short circuit LED1 lamp port; The filtering so the output of the port no-voltage of LED1 lamp, the voltage fluctuation buffering when capacitor C 3 is used for operate as normal are held concurrently.The output of the port on other each road is identical with this principle, so this circuit can also guarantee whole loop connection operate as normal after being applicable to open-circuit-protection and each paths of LEDs open circuit to the tandem operating circuit of single channel or multichannel output.
The above is merely the preferred embodiment of the utility model, and all equalizations of being done according to the utility model claim scope change and modify, and all should belong to the covering scope of the utility model claim.
Claims (8)
1. a Multifunctional LED lamp drive circuit comprises several LED lamps that constant-current driving modular converter (3) and output thereof are connected in series, and it is characterized in that, also comprises electric capacity and the controllable silicon corresponding and parallel with one another one by one with arbitrary LED lamp; The series connection puncture voltage is less than the corresponding separately backward diode of LED light working voltage between the anode of the corresponding LED lamp with it of arbitrary said silicon controlled control end.
2. according to the said drive circuit of claim 1, it is characterized in that, also comprise the reset switch (S1) that is used to control this module output that is electrically connected with said constant-current driving modular converter (3).
3. according to the said drive circuit of claim 1, it is characterized in that said constant-current driving modular converter (3) comprises inductance (L1) and controls the constant-current driven chip (U1A) of this inductance output.
4. according to the said drive circuit of claim 3, it is characterized in that said constant-current driving modular converter (3) also comprises the resistance that is used for current detecting (R4) that is electrically connected with said constant-current driven chip (U1A).
5. according to the said drive circuit of claim 1; It is characterized in that; Also comprise the voltage input module (1) that is electrically connected with said constant-current driving modular converter (3), this voltage input module (1) comprises the filter capacitor (C1) between the negative electrode of the forward diode (D1) that connects the power supply positive input terminal and power-input and said forward diode (D1).
6. according to the said drive circuit of claim 1, it is characterized in that, also comprise the light modulation input module (2) that is electrically connected with said constant-current driving modular converter (3).
7. according to the said drive circuit of claim 6, it is characterized in that said light modulation input module (2) is active or passive light-adjusting module.
8. according to the said drive circuit of claim 6, it is characterized in that said light modulation input module (2) comprises triode (Q1) and electric resistance partial pressure unit (R2, R3), the base stage of said triode (Q1) is connected with the dividing potential drop output of said electric resistance partial pressure unit (R2, R3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203762812U CN202334993U (en) | 2011-09-29 | 2011-09-29 | Multi-functional LED (Light Emitting Diode) lamp drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203762812U CN202334993U (en) | 2011-09-29 | 2011-09-29 | Multi-functional LED (Light Emitting Diode) lamp drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202334993U true CN202334993U (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203762812U Expired - Lifetime CN202334993U (en) | 2011-09-29 | 2011-09-29 | Multi-functional LED (Light Emitting Diode) lamp drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202334993U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105910016A (en) * | 2016-04-29 | 2016-08-31 | 四川蓝景光电技术有限责任公司 | LED light source used on side face of ultrathin lamp box of 8-20 cm |
| CN107148111A (en) * | 2017-05-26 | 2017-09-08 | 东莞华明灯具有限公司 | A kind of LED control circuit of multiple-channel output |
-
2011
- 2011-09-29 CN CN2011203762812U patent/CN202334993U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105910016A (en) * | 2016-04-29 | 2016-08-31 | 四川蓝景光电技术有限责任公司 | LED light source used on side face of ultrathin lamp box of 8-20 cm |
| CN107148111A (en) * | 2017-05-26 | 2017-09-08 | 东莞华明灯具有限公司 | A kind of LED control circuit of multiple-channel output |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |