CN104470082A - In-phase alternating current signal amplification type optical excitation grid drive circuit - Google Patents
In-phase alternating current signal amplification type optical excitation grid drive circuit Download PDFInfo
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- CN104470082A CN104470082A CN201410675315.6A CN201410675315A CN104470082A CN 104470082 A CN104470082 A CN 104470082A CN 201410675315 A CN201410675315 A CN 201410675315A CN 104470082 A CN104470082 A CN 104470082A
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Abstract
The invention discloses an in-phase alternating current signal amplification type optical excitation grid drive circuit mainly composed of a drive chip M, a self-locking optical excitation circuit and a drive circuit, and the drive circuit is connected with the drive chip M. The in-phase alternating current signal amplification type optical excitation grid drive circuit is characterized in that an in-phase alternating current signal amplification circuit is connected between the drive chip M and the self-locking optical excitation circuit in series; the in-phase alternating current signal amplification circuit is composed of a power amplifier P, a resistor R4, a resistor R5 and the like, one end of the resistor R4 is connected with a VCC pin of the drive chip M, the other end of the resistor R4 is connected with the positive electrode input end of the power amplifier P, one end of the resistor R5 is connected with the negative electrode input end of the power amplifier P, and the other end of the resistor R5 is connected with the self-locking optical excitation circuit. The related functions of the drive chip M are automatically excited according to external light conditions, additional starting devices do not need to be added, and therefore the power consumption of the drive circuit is reduced.
Description
Technical field
The present invention relates to a kind of LED drive circuit, specifically refer to a kind of homophase AC signal amplifying type 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 homophase AC signal amplifying type optical excitation gate driver circuit of start-up time.
Object of the present invention is achieved through the following technical solutions: a kind of homophase AC signal amplifying type optical excitation gate driver circuit, primarily of driving chip M, self-locking optical excitation circuit, and the drive circuit to be connected with this driving chip M forms, meanwhile, between driving chip M and self-locking energizing circuit, homophase AC signal amplifying circuit is also serially connected with; Described homophase AC signal amplifying circuit is by power amplifier P, the resistance R4 that one end is connected with the VCC pin of driving chip M, the other end is connected with the electrode input end of power amplifier P, the resistance R5 that one end is connected with the negative input of power amplifier P, the other end is connected with self-locking optical excitation circuit, and positive pole is connected with the electrode input end of power amplifier P, the polar capacitor C5 of negative pole external power supply forms, the output of described power amplifier P is connected with the INP pin of 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 electrode input end of power amplifier P, the photocell CDS of other end ground connection after potentiometer R2, the resistance R1 that one end is connected with the electrode input end of power amplifier P, 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 AND OR NOT gate IC3 of described NOR gate IC2 is connected, and the output of the output of NOR gate IC3 then power amplifier P is connected; The output of the other end of described resistance R5 then AND OR NOT gate IC2 is connected.
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, this 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.
(4) be provided with homophase AC signal amplifying circuit in the present invention, therefore can guarantee that the intensity of pulse signal can not decay, thus guarantee stable performance.
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, the present invention primarily of driving chip M, self-locking optical excitation circuit, the drive circuit be connected with driving chip M, and the homophase AC signal amplifying circuit be arranged between driving chip M and self-locking energizing circuit forms.
The pulse signal that described homophase AC signal amplifying circuit is used for self-locking energizing circuit lock produces amplifies, to avoid signal attenuation.It is by power amplifier P, and resistance R4, resistance R5 and polar capacitor C5 form.During connection, one end of resistance R4 is connected with the VCC pin of driving chip M, and its other end is connected with the electrode input end of power amplifier P; One end of resistance R5 is connected with the negative input of power amplifier P, and its other end is then connected with self-locking optical excitation circuit; The positive pole of polar capacitor C5 is then connected with the electrode input end of power amplifier P, its negative pole external power supply.Meanwhile, the output of this power amplifier P will be connected with the INP pin of driving chip M.
For guaranteeing that power amplifier P can normally work, the supply voltage that the negative pole of this polar capacitor C5 is external needs to be between 6 ~ 12V.Meanwhile, 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.
Wherein, described self-locking optical excitation circuit is then by NOR gate IC1, and NOR gate IC2, NOR gate IC3, photocell CDS, resistance R1, potentiometer R2 and electric capacity C1 form.During connection, one end of photocell CDS is connected with the electrode input end of power amplifier P, and its other end is ground connection after potentiometer R2.One end of resistance R1 is connected with the electrode input end of power amplifier P, and second input of its other end AND OR NOT gate IC2 is connected; The first input end of the positive pole AND OR NOT gate IC3 of electric capacity C1 is connected, and the output of its negative pole then AND OR NOT gate IC3 is connected.
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 AND OR NOT gate IC3 of described NOR gate IC2 is connected, and the output of the output of NOR gate IC3 then power amplifier P is connected.
The output of the other end of described resistance R5 then AND OR NOT gate IC2 is connected, and the pulse signal that namely output of NOR gate IC2 exports can be input to the negative input of power amplifier P after resistance R5.
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.For guaranteeing the normal operation of driving chip M, its VCC holds the voltage needing external+12V.
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.
As mentioned above, just the present invention can well be realized.
Claims (4)
1. a homophase AC signal amplifying type optical excitation gate driver circuit, primarily of driving chip M, self-locking optical excitation circuit, and the drive circuit to be connected with this driving chip M forms, it is characterized in that, between driving chip M and self-locking energizing circuit, be also serially connected with homophase AC signal amplifying circuit; Described homophase AC signal amplifying circuit is by power amplifier P, the resistance R4 that one end is connected with the VCC pin of driving chip M, the other end is connected with the electrode input end of power amplifier P, the resistance R5 that one end is connected with the negative input of power amplifier P, the other end is connected with self-locking optical excitation circuit, and positive pole is connected with the electrode input end of power amplifier P, the polar capacitor C5 of negative pole external power supply forms, the output of described power amplifier P is connected with the INP pin of driving chip M.
2. a kind of homophase AC signal amplifying type optical excitation gate driver circuit according to claim 1, it is characterized in that, described self-locking optical excitation circuit is by NOR gate IC1, NOR gate IC2, NOR gate IC3, one end is connected with the electrode input end of power amplifier P, the photocell CDS of other end ground connection after potentiometer R2, the resistance R1 that one end is connected with the electrode input end of power amplifier P, 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 AND OR NOT gate IC3 of described NOR gate IC2 is connected, and the output of the output of NOR gate IC3 then power amplifier P is connected; The output of the other end of described resistance R5 then AND OR NOT gate IC2 is connected.
3. a kind of homophase AC signal amplifying type optical excitation gate driver circuit according to claim 1 and 2, 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.
4. a kind of homophase AC signal amplifying type optical excitation gate driver circuit according to claim 3, it is characterized in that, described driving chip M is LTC4440A integrated chip.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410675315.6A CN104470082A (en) | 2014-11-22 | 2014-11-22 | In-phase alternating current signal amplification type optical excitation grid drive circuit |
| CN201510325231.4A CN104978927A (en) | 2014-11-22 | 2015-06-13 | Alternating-current signal amplification type gate drive system based on half-bridge controlled drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410675315.6A CN104470082A (en) | 2014-11-22 | 2014-11-22 | In-phase alternating current signal amplification type optical excitation grid drive circuit |
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| Publication Number | Publication Date |
|---|---|
| CN104470082A true CN104470082A (en) | 2015-03-25 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410675315.6A Pending CN104470082A (en) | 2014-11-22 | 2014-11-22 | In-phase alternating current signal amplification type optical excitation grid drive circuit |
| CN201510325231.4A Pending CN104978927A (en) | 2014-11-22 | 2015-06-13 | Alternating-current signal amplification type gate drive system based on half-bridge controlled drive circuit |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510325231.4A Pending CN104978927A (en) | 2014-11-22 | 2015-06-13 | Alternating-current signal amplification type gate drive system based on half-bridge controlled drive circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116075012B (en) * | 2023-03-27 | 2023-06-20 | 苏州贝克微电子股份有限公司 | Drive circuit for reducing voltage disturbance |
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2014
- 2014-11-22 CN CN201410675315.6A patent/CN104470082A/en active Pending
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- 2015-06-13 CN CN201510325231.4A patent/CN104978927A/en active Pending
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| CN104978927A (en) | 2015-10-14 |
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Application publication date: 20150325 |