CN204217184U - A kind of can the circuit of auto-compensation voltage stabilizing didoe temperature drift - Google Patents
A kind of can the circuit of auto-compensation voltage stabilizing didoe temperature drift Download PDFInfo
- Publication number
- CN204217184U CN204217184U CN201420746811.1U CN201420746811U CN204217184U CN 204217184 U CN204217184 U CN 204217184U CN 201420746811 U CN201420746811 U CN 201420746811U CN 204217184 U CN204217184 U CN 204217184U
- Authority
- CN
- China
- Prior art keywords
- voltage stabilizing
- stabilizing didoe
- voltage
- diode
- output
- 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.)
- Active
Links
Abstract
The utility model disclose a kind of can the circuit of auto-compensation voltage stabilizing didoe temperature drift, comprise: voltage stabilizing didoe, voltage follower, diode group and resistance, this voltage stabilizing didoe has the first positive pole and the first negative pole, this voltage follower has in-phase input end, inverting input and output, this resistance one end is connected with one end of in-phase input end and diode group respectively, the other end of diode group is connected with the first negative pole, first positive pole and ground wire are electrically connected, this inverting input and output are electrically connected, the resistance other end is used for input power, the output of voltage follower is used for external output voltage.The utility model adopts the negative temperature coefficient of forward-biased diode to offset the positive temperature coefficient of reverse-biased voltage stabilizing didoe, thus can reference signal be provided to well the adjusting control circuit of LED constant current driving power, obviously improve the drift phenomenon of LED constant current driving power output current after extremely low temperature environment or body self-heating cooking cause higher temperature.
Description
Technical field
The utility model relates to LED Driving technique field, particularly relate to a kind of can the circuit of auto-compensation voltage stabilizing didoe temperature drift.
Background technology
Voltage stabilizing didoe (being Zener diode again) is the face contact-type crystal diode that a kind of silicon materials are made, and is called for short voltage-stabiliser tube.Voltage stabilizing didoe is when reverse breakdown, and in certain current range (in other words within the scope of certain power loss), terminal voltage is almost constant, shows stabilized voltage characteristic, is thus widely used among stabilized voltage power supply and amplitude limiter circuit.
Tradition small-signal voltage stabilizing circuit generally completes with diode circuit of voltage regulation, can select the voltage stabilizing didoe Z100 of various standard voltage stabilizing value, refer to Fig. 1 according to different needs.This circuit structure advantage is as follows: 1, circuit structure is simple; 2, cost is low; 3, at input voltage lower than not current sinking during voltage stabilizing value, this advantage is even more important in some small-signal voltage stabilizing amplitude limiter circuits.In addition, this circuit structure shortcoming is as follows: 1, precision lower (conventional ± 5%, what precision was higher have ± error range of 2%); 2, with loading capability is poor; 3, when input voltage is more higher than voltage stabilizing value, circuit loss is large; 4, temperature influence has obvious voltage stabilizing value drift phenomenon, and ambient temperature is higher, then voltage stabilizing point is higher.
Need to use various reference voltage base in LED constant current driving power field, circuit shown in Fig. 1 is used for the reference data of external dim signal, the external dim signal level of industry universal is the control signal voltage of a 0-10V, this voltage is produced after D/A changes by the single-chip microcomputer signal of light adjusting controller inside, driving force is limited, due to logically need without LED constant current driving power during external dim signal with rated nominal value output current, nominal current needs a stable reference voltage as with reference to benchmark herein, the 0-10V control voltage 0-100% Serial regulation in proportion that LED constant current driving power output current exports by dimmer is needed after external light adjusting controller.Refer to Fig. 2, in order to promote the driving force of circuit, a voltage follower U100 is accessed on the basis of the circuit shown in Fig. 1, and when not accessing light adjusting controller, voltage follower U100 output voltage is the voltage stabilizing value V of voltage stabilizing didoe Z100
zcontroller maximum output (100% power stage) is modeled as to realize the base reference signal when not accessing light adjusting controller, selected suitable resistance R100 is carried out according to input power Vcc value, and select the voltage stabilizing didoe Z100 of error range less (± 2%), thus improve the precision of output voltage, while this circuit loss of reduction, promote its with loading capability.
But affect by power supply internal temperature when above-mentioned traditional connection voltage stabilizing didoe is used as reference data, voltage stabilizing value can be drifted about, thus driving power output constant current point is caused to drift about.
Therefore, prior art existing defects, needs to improve.
Utility model content
The purpose of this utility model be to provide a kind of can the circuit of auto-compensation voltage stabilizing didoe temperature drift, improve the shortcoming of traditional conventional diode circuit of voltage regulation, extend the useful life of LED.
The technical solution of the utility model is as follows: the utility model provide a kind of can the circuit of auto-compensation voltage stabilizing didoe temperature drift, comprise: voltage stabilizing didoe, voltage follower, diode group and a resistance, described voltage stabilizing didoe has the first positive pole and the first negative pole, described voltage follower has an in-phase input end, one inverting input and an output, described resistance one end respectively with the in-phase input end of voltage follower, and the first negative pole of one end voltage stabilizing didoe of diode group is electrically connected, the other end of described diode group is connected with the first negative pole of described voltage stabilizing didoe, first positive pole of described voltage stabilizing didoe and ground wire are electrically connected, the inverting input of described voltage follower and output are electrically connected, the other end of described resistance is used for input power, the output of described voltage follower is used for external output voltage, described diode group comprises the diode of one or more series connection.
Described diode group comprises the first diode and the second diode, described first diode has the second positive pole and the second negative pole, described second diode has the 3rd positive pole and the 3rd negative pole, described second positive pole is connected with one end of resistance and in-phase input end respectively, described second negative pole is connected with the 3rd positive pole, and described 3rd negative pole is connected with the first negative pole.
The voltage stabilizing value of described voltage stabilizing didoe is 9.1V.
Adopt such scheme, of the present utility model can the circuit of auto-compensation voltage stabilizing didoe temperature drift, the negative temperature coefficient of forward-biased diode is adopted to offset the positive temperature coefficient of reverse-biased voltage stabilizing didoe, thus can reference signal be provided to well the adjusting control circuit of LED constant current driving power, obviously improve the drift phenomenon of LED constant current driving power output current after extremely low temperature environment or body self-heating cooking cause higher temperature, enhance the stability of LED constant current driving power, slow down the degradation time of LED, extend life of product.
Accompanying drawing explanation
Fig. 1 adopts voltage stabilizing didoe to realize the circuit diagram of voltage stabilizing function in prior art.
Fig. 2 adopts voltage stabilizing didoe to realize another circuit diagram of voltage stabilizing function in prior art.
Fig. 3 is that the utility model can the schematic diagram of circuit of auto-compensation voltage stabilizing didoe temperature drift.
Fig. 4 is that the utility model can the schematic diagram of circuit one embodiment of auto-compensation voltage stabilizing didoe temperature drift.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Refer to Fig. 3, the utility model provide a kind of can the circuit of auto-compensation voltage stabilizing didoe temperature drift, this circuit is used in LED constant current driving power, specifically comprise: voltage stabilizing didoe Z, voltage follower U, a diode group D and resistance R, described voltage stabilizing didoe Z has the first positive pole and the first negative pole, described voltage follower U have an in-phase input end+, one inverting input-and an output, described resistance R one end respectively with the in-phase input end of voltage follower U+, and one end of diode group D connects, the other end of described diode group D is connected with first negative pole of described voltage stabilizing didoe Z, first positive pole and the ground wire of described voltage stabilizing didoe Z are electrically connected, the inverting input of described voltage follower U-be electrically connected with output, the other end of described resistance R is used for input power Vcc, the output of described voltage follower U is used for external output voltage, described diode group D comprises the diode of one or more series connection.
The utility model adopts the negative temperature coefficient of the forward-biased diode in diode group D to offset the positive temperature coefficient of reverse-biased voltage stabilizing didoe Z, thus can provide reference signal to well the adjusting control circuit of LED constant current driving power.The quantity of diode included in diode group D coordinates with the voltage stabilizing value of voltage stabilizing didoe Z to be selected.
As an alternative embodiment, described diode group comprises the first diode D1 and the second diode D2, utilizes this first and second diode D1, D2 to improve voltage stabilizing didoe Z voltage stabilizing value V
zvariation with temperature produces drift phenomenon.Described first diode D1 has the second positive pole and the second negative pole, described second diode D2 has the 3rd positive pole and the 3rd negative pole, described second positive pole respectively with one end of resistance R and in-phase input end+be connected, described second negative pole is connected with the 3rd positive pole, and described 3rd negative pole is connected with the first negative pole.
Under the occasion exported as required 10V, the voltage stabilizing value V of described voltage stabilizing didoe Z
zfor 9.1V, refer to Fig. 4, due to normal silicon diode forward voltage drop V
f0.45V is roughly, now voltage stabilizing didoe Z voltage stabilizing value V when small area analysis normal temperature (25 DEG C)
zfor standard 9.1V, after series connection, total voltage is 0.45*2+9.1=10V, consistent with design 10V normal voltage, when high temperature (100 DEG C), and the forward voltage drop V of first and second pole pipe D1, D2
fbe reduced to 0.2V, and the voltage stabilizing value V of now voltage stabilizing didoe Z
zbe elevated to 9.5V, remain that 10V output voltage is constant.
Further, utilize rule above, when other types or occasion need different output voltages, different voltage stabilizing didoe Z can be selected, and increase or reduce the quantity of series diode D, make combination voltage reach the numerical value of needs.Or series diode D is replaced by forward voltage drop V
flower Schottky type diode.
In sum, the utility model provide a kind of can the circuit of auto-compensation voltage stabilizing didoe temperature drift, the negative temperature coefficient of forward-biased diode is adopted to offset the positive temperature coefficient of reverse-biased voltage stabilizing didoe, thus can reference signal be provided to well the adjusting control circuit of LED constant current driving power, obviously improve the drift phenomenon of LED constant current driving power output current after extremely low temperature environment or body self-heating cooking cause higher temperature, enhance the stability of LED constant current driving power, slow down the degradation time of LED, extend life of product.
These are only preferred embodiment of the present utility model, be not limited to the utility model, all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (3)
1. one kind can the circuit of auto-compensation voltage stabilizing didoe temperature drift, it is characterized in that, comprise: voltage stabilizing didoe, voltage follower, diode group and a resistance, described voltage stabilizing didoe has the first positive pole and the first negative pole, described voltage follower has an in-phase input end, one inverting input and an output, described resistance one end respectively with the in-phase input end of voltage follower, and one end of diode group connects, the other end of described diode group is connected with the first negative pole of described voltage stabilizing didoe, first positive pole of described voltage stabilizing didoe and ground wire are electrically connected, the inverting input of described voltage follower and output are electrically connected, the other end of described resistance is used for input power, the output of described voltage follower is used for external output voltage, described diode group comprises the diode of one or more series connection.
2. according to claim 1 can the circuit of auto-compensation voltage stabilizing didoe temperature drift, it is characterized in that, described diode group comprises the first diode and the second diode, described first diode has the second positive pole and the second negative pole, described second diode has the 3rd positive pole and the 3rd negative pole, described second positive pole is connected with one end of resistance and in-phase input end respectively, and described second negative pole is connected with the 3rd positive pole, and described 3rd negative pole is connected with the first negative pole.
3. according to claim 2 can the circuit of auto-compensation voltage stabilizing didoe temperature drift, it is characterized in that, the voltage stabilizing value of described voltage stabilizing didoe is 9.1V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420746811.1U CN204217184U (en) | 2014-12-03 | 2014-12-03 | A kind of can the circuit of auto-compensation voltage stabilizing didoe temperature drift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420746811.1U CN204217184U (en) | 2014-12-03 | 2014-12-03 | A kind of can the circuit of auto-compensation voltage stabilizing didoe temperature drift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204217184U true CN204217184U (en) | 2015-03-18 |
Family
ID=52985812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420746811.1U Active CN204217184U (en) | 2014-12-03 | 2014-12-03 | A kind of can the circuit of auto-compensation voltage stabilizing didoe temperature drift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204217184U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108933517A (en) * | 2018-09-06 | 2018-12-04 | 广州金升阳科技有限公司 | The output voltage feed circuit and temperature-compensation circuit of switch converters |
| CN109936891A (en) * | 2017-12-18 | 2019-06-25 | 天津工大海宇照明部品有限公司 | A kind of LED rear combination lamp illuminator |
-
2014
- 2014-12-03 CN CN201420746811.1U patent/CN204217184U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109936891A (en) * | 2017-12-18 | 2019-06-25 | 天津工大海宇照明部品有限公司 | A kind of LED rear combination lamp illuminator |
| CN108933517A (en) * | 2018-09-06 | 2018-12-04 | 广州金升阳科技有限公司 | The output voltage feed circuit and temperature-compensation circuit of switch converters |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103439662A (en) | Low-cost battery electricity quantity detection circuit | |
| CN104519633B (en) | A kind of under-voltage protecting circuit for LED lamp | |
| CN204217184U (en) | A kind of can the circuit of auto-compensation voltage stabilizing didoe temperature drift | |
| CN203365653U (en) | Low-cost battery electric quantity detection circuit | |
| CN103036411A (en) | Charge pump circuit | |
| CN102624369B (en) | POR (Power-on Reset) circuit with variable reset point on basis of band gap reference source | |
| CN205210746U (en) | Constant current control ware and constant current control circuit | |
| CN204681245U (en) | Power source loads open loop protection circuit | |
| CN203405751U (en) | Novel voltage stabilizer circuit structure | |
| CN104837245B (en) | A kind of LED drive chip and BUCK type LED drive circuit | |
| CN207612197U (en) | A kind of driving bleeder circuit of switching tube | |
| CN203661030U (en) | Electrical level switching circuit and circuit board having same | |
| CN203492241U (en) | Novel LED dimming module | |
| CN202475387U (en) | Power-on reset POR circuit with variable reset voltage point, based on band gap reference source | |
| CN205427684U (en) | Intelligence constant voltage power supply control circuit | |
| CN104780639A (en) | LED lamp overheat protection circuit | |
| CN203708589U (en) | Linear constant current LED driving circuit possessing temperature compensation | |
| CN204559970U (en) | A kind of LED drive chip and BUCK type LED drive circuit | |
| CN103327697B (en) | Drive circuit and light emitting device | |
| CN201853155U (en) | Precision constant-current source circuit module | |
| CN103885381B (en) | A kind of wide pressure PLC input circuit | |
| CN201886372U (en) | Band-gap reference voltage detection circuit | |
| CN203910796U (en) | Novel LED lamp bead | |
| CN104836316A (en) | Current-adjustable constant current charging circuit | |
| CN204598415U (en) | A kind of overload protecting circuit of LED drive power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518101 A3 factory building, Gonghe fourth industrial zone, manhole street, Shenzhen, Guangdong, Baoan District Patentee after: Shenzhen Song Sheng electronic Limited by Share Ltd Address before: C building fifth layer 518000 Guangdong city of Shenzhen province Baoan District Fuyong street Fuyong community Fuhai Fuhai Industrial Zone A West Road Patentee before: SOSEN ELECTRONICS CO., LTD. |