CN104470081A - Self-locking type optical excitation grid driving circuit - Google Patents
Self-locking type optical excitation grid driving circuit Download PDFInfo
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- CN104470081A CN104470081A CN201410675311.8A CN201410675311A CN104470081A CN 104470081 A CN104470081 A CN 104470081A CN 201410675311 A CN201410675311 A CN 201410675311A CN 104470081 A CN104470081 A CN 104470081A
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Abstract
The invention discloses a self-locking type optical excitation grid driving circuit which is mainly composed of a driving chip M and a driving circuit connected with the driving chip M. The self-locking type optical excitation grid driving circuit is characterized by being further provided with a self-locking optical excitation circuit connected with the driving chip M. The self-locking optical excitation circuit is composed of a NOR gate IC1, a NOR gate IC2, a NOR gate IC3, a photocell CDS, a resistor R1 and a capacitor C1, wherein one end of the photocell CDS is connected with the VCC pin of the driving chip M, the other end of the photocell CDS passes through a potentiometer R2 and then is grounded, one end of the resistor R1 is connected with the VCC pin of the driving chip M, the other end of the resistor R1 is connected with the second input end of the NOR gate IC2, and the capacitor C1 is connected between the first input end and the output end of the NOR gate IC3 in series. According to the self-locking type optical excitation grid driving circuit, the relevant functions of the driving chip M can be automatically excited according to external light conditions, no additional starting device is needed, and therefore power consumption is low.
Description
Technical field
The present invention relates to a kind of LED drive circuit, specifically refer to a kind of self-locking optical excitation gate driver circuit.
Background technology
At present, because LED has, energy consumption is low, the feature such as long service life and safety and environmental protection, and it has become one of main product of people's life lighting.Because LED is different from traditional incandescent lamp, therefore its needs are driven by special drive circuit.But, the widely used gate driver circuit of current people due to the irrationality of its project organization, defects such as result in current gate driver circuit and have that energy consumption is higher, current noise comparatively large and start-up time is longer.
Summary of the invention
The object of the invention is to the defect that energy consumption is higher, current noise is comparatively large and start-up time is longer overcoming the existence of current gate driver circuit, a kind of reasonable in design is provided, can effectively reduce energy consumption and current noise, obviously shorten a kind of self-locking optical excitation gate driver circuit of start-up time.
Object of the present invention is achieved through the following technical solutions: a kind of self-locking optical excitation gate driver circuit, primarily of driving chip M, and the drive circuit to be connected with this driving chip M forms, and meanwhile, is also provided with the self-locking optical excitation circuit be connected with this driving chip M.
Described self-locking optical excitation circuit is by NOR gate IC1, NOR gate IC2, NOR gate IC3, one end is connected with the VCC pin of driving chip M, the photocell CDS of other end ground connection after potentiometer R2, the resistance R1 that one end is connected with the VCC pin of driving chip M, second input of other end AND OR NOT gate IC2 is connected, and the electric capacity C1 be serially connected between the first input end of NOR gate IC3 and output forms; The first input end of described NOR gate IC1 is connected with the tie point of potentiometer R2 with photocell CDS, and the output of its second input AND OR NOT gate IC2 is connected, and the first input end of its output then AND OR NOT gate IC2 is connected; Second input of the output of described NOR gate IC2 also AND OR NOT gate IC3 is connected, and the output of NOR gate IC3 is then connected with the INP pin of driving chip M.
Further, described drive circuit is by transformer T, be serially connected with the diode D1 between the VCC pin of driving chip M and BOOST pin, be serially connected with the electric capacity C2 between the BOOST pin of driving chip M and TG pin, be serially connected with the resistance R3 between the TG pin of driving chip M and TS pin, and base stage is connected with the TG pin of driving chip M, collector electrode in turn after electric capacity C3 and electric capacity C4 ground connection and the transistor Q1 of grounded emitter form; The Same Name of Ends of the primary coil of described transformer T is connected with the tie point of electric capacity C4 with electric capacity C3, ground connection after its non-same polarity is then connected with the emitter of transistor Q1; Meanwhile, the emitter of transistor Q1 is also connected with the TS pin of driving chip M, and the secondary coil of described transformer T is provided with tap Y1 and tap Y2.
For guaranteeing result of use, described driving chip M preferentially adopts LTC4440A integrated chip to realize.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention can excite the correlation function of driving chip M automatically according to outside illumination condition, and without the need to increasing extra starting drive, therefore its power consumption is lower.
(2) be only 1/4 of conventional gate drive circuit start-up time start-up time of the present invention, therefore its start-up time is extremely short.
(3) the present invention effectively can avoid external electromagnetic interference, can reduce current noise significantly.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, self-locking optical excitation gate driver circuit of the present invention primarily of driving chip M, the drive circuit be connected with this driving chip M, and the self-locking optical excitation circuit be connected with driving chip M forms.
As described in Figure 1, this self-locking optical excitation circuit is made up of photocell CDS, NOR gate IC1, NOR gate IC2, NOR gate IC3, resistance R1, potentiometer R2 and electric capacity C1.Wherein, photocell CDS is used for producing electric energy under illumination condition, and its one end is connected with the VCC pin of driving chip M, and its other end is ground connection after potentiometer R2 then.
Meanwhile, one end of resistance R1 is also connected with the VCC pin of driving chip M, and second input of its other end then AND OR NOT gate IC2 is connected.Electric capacity C1 is serially connected between the first input end of NOR gate IC3 and output, and for guaranteeing that NOR gate IC3 can normally run, the positive pole of this electric capacity C1 needs the first input end of AND OR NOT gate IC3 to be connected, and the output of its negative pole then AND OR NOT gate IC3 connects.
The first input end of described NOR gate IC1 is connected with the tie point of potentiometer R2 with photocell CDS, the output of its second input AND OR NOT gate IC2 is connected, the first input end of its output then AND OR NOT gate IC2 is connected, and namely forms one between this NOR gate IC1 and NOR gate IC2 and intersects gate circuit.Second input of the output AND OR NOT gate IC3 of described NOR gate IC2 is connected, and the output of NOR gate IC3 is then connected with the INP pin of driving chip M.
Described drive circuit is then made up of transformer T, diode D1, electric capacity C2, resistance R3, electric capacity C3, electric capacity C4 and transistor Q1.During connection, the P pole of diode D1 is connected with the VCC pin of driving chip M, and its N pole is then connected with the BOOST pin of driving chip M.The positive pole of electric capacity C2 is connected with the BOOST pin of driving chip M, and its negative pole is then connected with the TG pin of driving chip M.
Resistance R3 is divider resistance, and it is serially connected with between the TG pin of driving chip M and TS pin.The base stage of transistor Q1 is then connected with the TG pin of driving chip M, and its collector electrode is ground connection after electric capacity C3 and electric capacity C4 in turn, its grounded emitter.Meanwhile, the collector electrode of this transistor Q1 also needs the direct voltage of external+6V, to guarantee that transistor Q1 has enough bias voltages to drive himself conducting.
Described transformer T exports to outside field effect transistor after being used for that+the 6V of outside direct voltage is carried out transformation process.The Same Name of Ends of the primary coil of this transformer T is connected with the tie point of electric capacity C4 with electric capacity C3, ground connection after its non-same polarity is then connected with the emitter of transistor Q1.Meanwhile, the emitter of transistor Q1 is also connected with the TS pin of driving chip M, and the secondary coil of described transformer T is provided with tap Y1 and tap Y2.
The Same Name of Ends of the secondary coil of transformer T, tap Y1, tap Y2 together with the non-same polarity of secondary coil as output of the present invention.According to the situation of reality, user can only select any one or several port of these four outputs to use.
For guaranteeing result of use, the high-frequency N-channel MOS FET grid drive chip that this driving chip M preferentially adopts Linear Techn Inc. to produce, namely LTC4440A integrated chip realizes.The feature of this driving chip M is can with the input voltage work up to 80V, and can up to can continuous operation during 100V transient state.
As mentioned above, just the present invention can well be realized.
Claims (3)
1. a self-locking optical excitation gate driver circuit, primarily of driving chip M, and the drive circuit be connected with this driving chip M forms, and it is characterized in that, is also provided with the self-locking optical excitation circuit be connected with this driving chip M; Described self-locking optical excitation circuit is by NOR gate IC1, NOR gate IC2, NOR gate IC3, one end is connected with the VCC pin of driving chip M, the photocell CDS of other end ground connection after potentiometer R2, the resistance R1 that one end is connected with the VCC pin of driving chip M, second input of other end AND OR NOT gate IC2 is connected, and the electric capacity C1 be serially connected between the first input end of NOR gate IC3 and output forms; The first input end of described NOR gate IC1 is connected with the tie point of potentiometer R2 with photocell CDS, and the output of its second input AND OR NOT gate IC2 is connected, and the first input end of its output then AND OR NOT gate IC2 is connected; Second input of the output of described NOR gate IC2 also AND OR NOT gate IC3 is connected, and the output of NOR gate IC3 is then connected with the INP pin of driving chip M.
2. a kind of self-locking optical excitation gate driver circuit according to claim 1, it is characterized in that, described drive circuit is by transformer T, be serially connected with the diode D1 between the VCC pin of driving chip M and BOOST pin, be serially connected with the electric capacity C2 between the BOOST pin of driving chip M and TG pin, be serially connected with the resistance R3 between the TG pin of driving chip M and TS pin, and base stage is connected with the TG pin of driving chip M, collector electrode in turn after electric capacity C3 and electric capacity C4 ground connection and the transistor Q1 of grounded emitter form; The Same Name of Ends of the primary coil of described transformer T is connected with the tie point of electric capacity C4 with electric capacity C3, ground connection after its non-same polarity is then connected with the emitter of transistor Q1; Meanwhile, the emitter of transistor Q1 is also connected with the TS pin of driving chip M, and the secondary coil of described transformer T is provided with tap Y1 and tap Y2.
3. a kind of self-locking optical excitation gate driver circuit according to claim 1 and 2, it is characterized in that, described driving chip M is LTC4440A integrated chip.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410675311.8A CN104470081A (en) | 2014-11-22 | 2014-11-22 | Self-locking type optical excitation grid driving circuit |
| CN201510324181.8A CN104968087A (en) | 2014-11-22 | 2015-06-13 | Self-locking type optical excitation grid driving system based on half-bridge control drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410675311.8A CN104470081A (en) | 2014-11-22 | 2014-11-22 | Self-locking type optical excitation grid driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104470081A true CN104470081A (en) | 2015-03-25 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410675311.8A Pending CN104470081A (en) | 2014-11-22 | 2014-11-22 | Self-locking type optical excitation grid driving circuit |
| CN201510324181.8A Pending CN104968087A (en) | 2014-11-22 | 2015-06-13 | Self-locking type optical excitation grid driving system based on half-bridge control drive circuit |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510324181.8A Pending CN104968087A (en) | 2014-11-22 | 2015-06-13 | Self-locking type optical excitation grid driving system based on half-bridge control drive circuit |
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| Country | Link |
|---|---|
| CN (2) | CN104470081A (en) |
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2014
- 2014-11-22 CN CN201410675311.8A patent/CN104470081A/en active Pending
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2015
- 2015-06-13 CN CN201510324181.8A patent/CN104968087A/en active Pending
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| CN104968087A (en) | 2015-10-07 |
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Application publication date: 20150325 |