CN202907287U - LED silicon-controlled light-dimming driving circuit based on IW3602 chip - Google Patents
LED silicon-controlled light-dimming driving circuit based on IW3602 chip Download PDFInfo
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- CN202907287U CN202907287U CN 201220556042 CN201220556042U CN202907287U CN 202907287 U CN202907287 U CN 202907287U CN 201220556042 CN201220556042 CN 201220556042 CN 201220556042 U CN201220556042 U CN 201220556042U CN 202907287 U CN202907287 U CN 202907287U
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Abstract
The utility model discloses an LED silicon-controlled light-dimming driving circuit based on an IW3602 chip. The output power is substantially increased and a better silicon-controlled light-dimming effect is achieved by improving the chip connection method and the circuit combination. The circuit comprises a control chip IW3602, an EMI filter circuit, a BUCK converter, a control chip L6561D, a power factor correction circuit, a first diode and a second diode, wherein a pin 1 of the control chip IW3602 is connected, through a voltage limiting circuit, to a voltage division circuit to which a pin 3 of the control chip L6561D is connected, cathodes of the first diode and the second diode are connected to a pin 3 of the control chip IW3602 through a current limiting resistor after being connected together, anodes of the first diode and the second diode are respectively connected to two input ends of the EMI filter circuit, the control chip L6561D is connected with the power factor correction circuit, and the control chip IW3602 is connected with a BUCK circuit.
Description
Technical field
The utility model relates to a kind of power circuit, relates in particular to a kind of LED power circuit for controllable silicon light modulation.
Background technology
Controllable silicon is used very general at the LED lighting field as the light modulation interface, so IWAT company has developed this chips of IW3602, be widely used in the controllable silicon light modulation LED lamp bulb of LED.But describe in the specifications as IW3602, be limited to 10W in the output of this chips, and chip producer has provided typical application circuit.Such chip of other producers also has almost identical output power limit.Therefore, when using, be very limited.
Open day be that on 04 13rd, 2011, publication number are that the patent documentation of CN102014557A discloses such technical scheme, a kind of LED dimming power source comprises input surge protection circuit, EMI filter circuit, bridge rectifier, passive power factor correcting circuit, line voltage detecting circuit, buck DC/DC converter circuit and IC control circuit; The IC control circuit is LM3445.Can carry out the steady light modulation of wide region to LED by compatible TRIAC dimmer.But adopt LM3445 because the IC controller of this technical scheme is the PWM controller, and used the typical wiring scheme, so its peak power output is 8W to 10W, still be subject to the restriction of less power output.
Summary of the invention
The utility model mainly provides a kind of controllable silicon light modulation led drive circuit based on the IW3602 chip, by improving the combination of chip connected mode and circuit, has significantly improved power output, and has had better thyristor regulating light effect.
The utility model is mainly solved by following technical proposals for the prior art problem, a kind of LED thyristor regulating light drive circuit based on the IW3602 chip, comprise control chip IW3602, the EMI filter circuit, the BUCK converter, control chip L6561D, circuit of power factor correction, the first diode and the second diode, 1 pin of control chip IW3602 is connected in the bleeder circuit that control chip L6561D 3 pin connect by pressure limiting circuit, after linking to each other, the negative electrode of the first diode and the second diode is connected to 3 pin of control chip IW3602 by the sampling current-limiting resistance, anode is connected respectively to two inputs of EMI filter circuit, 3 pin of control chip IW3602 also connect the direct current seedbed by a filter capacitor, control chip L6561D connects circuit of power factor correction, and control chip IW3602 connects the BUCK circuit.
This technical scheme is based on the new applied topology of IW3602 chip, uses the APFC of prime to cooperate the circuit of reversed excitation of the IW3602 control of rear class to consist of the led drive circuit that is fit to controllable silicon light modulation.Wherein, take control chip L6561D as main formation prime APFC, the 1 foot control signal processed of control chip IW3602 is connected in the bleeder circuit of control chip L6561D 3 pin by pressure limiting circuit, make the fluctuating signal that had both comprised input DC power in the signal of control chip L6561D 3 pin, the control signal that comprises again simultaneously the IW3602 of proper proportion has realized that good controllable silicon light modulation LED drives effect; The voltage sample of IW3602 (3 pin) reconfiguration is at the EMI filter circuit, namely by the first diode and the second diode alternating voltage is taken out as sampled voltage in the EMI circuit, supply with IW3602 as the input voltage detection signal, and select the MOSFET of suitable power, thereby realize the larger output power of IW3602.
As preferably, bleeder circuit comprises the first divider resistance, the second divider resistance and the 3rd divider resistance, the first divider resistance is connected between 3 pin of the positive pole of input DC power and control chip L6561D, the second divider resistance be connected between 3 pin and input DC power negative pole of control chip L6561D after the 3rd divider resistance is connected, be connected pressure limiting circuit at the second divider resistance with the series connection node of the 3rd divider resistance, between 3 pin of control chip L6561D and input DC power negative pole, also be connected an electric capacity of voltage regulation.The voltage sampling circuit of the control chip L6561D of active power factor circuit is made of resistor voltage divider circuit, will be input to 3 pin of control chip L6561D after the input DC power dividing potential drop, realizes power factor correction.
As preferably; pressure limiting circuit comprises the first pressure limiting resistance, the second pressure limiting resistance and protection diode; between 1 pin of the first pressure limiting resistance and the series connection node that is connected to the second divider resistance and the 3rd divider resistance after the second pressure limiting resistance is connected and control chip IW3602, on the anodic bonding first pressure limiting resistance of protection diode and the second pressure limiting resistance series connection node, negative electrode is connected the input DC power negative pole.The protection diode absorbs the too high pulsating voltage of input DC power, so that 1 pin of IW3602 is avoided high-voltage impact.
As preferably, the switching tube of BUCK circuit is MOSFET.
As preferably, the output of control chip IW3602 is connected to the MOSFET grid by resistance, resistance is divided into first grid resistance and second grid resistance, first grid resistance connect control chip IW3602 7 pin and be connected to the MOSFET grid after second grid resistance is connected, also comprise a PNP triode, 7 pin, the emitter that the base stage of PNP triode connects control chip IW3602 is connected to that first grid resistance is connected on the series connection node with second grid resistance, collector electrode connects the MOSFET source electrode.First grid resistance and the effect of second grid resistance are the switching speeds of regulating MOSFET, reduce the ringing that grid occurs, and reduce EMI, and the electric current that also grid capacitance is discharged and recharged carries out current limliting.But resistance affects the turn-off speed of MOSFET, therefore connected the PNP triode, when needs are closed MOSFET, the conducting of PNP triode provides discharge loop for the grid parasitic capacitance, and with the first grid resistive short, shorten like this discharge time of grid parasitic capacitance, namely improved the turn-off speed of MOSFET.
The beneficial effect that the utility model brings is, employing is based on the new applied topology of IW3602 chip, use L6561D prime APFC, but cooperate the connected mode of distinctive IW3602 and L6561D to realize that the silicon dimming LED (Light Emitting Diode) drives effect preferably; By improving the IW3602 voltage sample circuit, make it have higher output power simultaneously, satisfied the driving demand of the LED lamp of relatively high power.
Description of drawings
Fig. 1 is a kind of schematic diagram of the present utility model;
Fig. 2 is based on the 60W led drive circuit schematic diagram of the utility model circuit structure.
Among the figure: LDM is the EMI filter circuit, and DS is rectifier bridge, and US21 is control chip L6561D; US31 is control chip IW3602; GJ is circuit of power factor correction, and BC is the BUCK circuit, and DS15 is the first diode; DS16 is the second diode; RS35AD is the sampling current-limiting resistance, and CS33 is filter capacitor, and CS29 is electric capacity of voltage regulation; RS21AC is the first divider resistance; RS21D is the second divider resistance, and RS21E is the 3rd divider resistance, and RS21G is the first pressure limiting resistance; RS36 is the second pressure limiting resistance; DS21 is the protection diode, and RS31A is first grid resistance, and RS31B is second grid resistance; Q41 is switching tube, and QS31 is the PNP triode.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is further described in detail.
Embodiment: as shown in Figure 1, the utility model is a kind of LED thyristor regulating light drive circuit based on the IW3602 chip.The output of thyristor regulating volt circuit provides input DC power by rectifier bridge DS for subsequent conditioning circuit after connecting the EMI filter circuit, control chip L6561D control APFC GJ, control chip IW3602 control BUCK circuit BC, be connected to control chip IW3602(US31 by sampling current-limiting resistance RS35AD after the negative electrode of the first diode DS15 and the second diode DS16 links to each other) 3 pin, anode be connected respectively to two inputs of EMI filter circuit LDM, filter capacitor CS33 is connected to control chip IW3602(US31) 3 pin and power supply ground between; The first divider resistance RS21AC, the second divider resistance RS21D and the 3rd divider resistance RS21E form bleeder circuit, the first divider resistance RS21AC is connected to positive pole and the control chip L6561D(US21 of input DC power) 3 pin between, electric capacity of voltage regulation CS29 is connected to control chip L6561D(US21) 3 pin and power supply ground between, the second divider resistance RS21D be connected to control chip L6561D(US21 after the 3rd divider resistance RS21E connects) 3 pin and power supply ground between, be connected the first pressure limiting resistance R S21G at the second divider resistance RS21D with the series connection node a of the 3rd divider resistance RS21E, the rear control chip IW3602(US31 that is connected of the second pressure limiting resistance R S36 and the first pressure limiting resistance R S21G series connection) 1 pin is protected anodic bonding the first pressure limiting resistance R S21G of diode DS21 and the series connection node b of the second pressure limiting resistance R S36, negative electrode connects power supply ground; Control chip IW3602(US31) output 7 pin are by first grid resistance R S31A and the second grid resistance R S31B connecting valve pipe Q41 grid of series connection, and PNP triode Q31 base stage connects control chip IW3602(US31) output 7 pin, upper, the collector electrode connecting valve pipe Q41 source electrode of series connection node c that emitter connects first grid resistance R S31A and second grid resistance R S31B; Other pin connected modes of control chip L6561D and IW3602 are identical with conventional connected mode.
Figure 2 shows that the complete circuit based on the 60W led drive circuit of the utility model circuit connecting mode.The first diode DS15 and the second diode DS16 are connected to d point and the e point of EMI filter circuit.Connected mode among the figure between control chip IW3602 and the L6561D, and the voltage sample connected mode of two control chips is all identical with Fig. 1.
Claims (5)
1. LED thyristor regulating light drive circuit based on the IW3602 chip, comprise control chip IW3602, the EMI filter circuit, the BUCK converter, it is characterized in that: also comprise control chip L6561D, circuit of power factor correction, the first diode and the second diode, 1 pin of described control chip IW3602 is connected in the bleeder circuit that control chip L6561D 3 pin connect by pressure limiting circuit, after linking to each other, the negative electrode of described the first diode and the second diode is connected to 3 pin of control chip IW3602 by the sampling current-limiting resistance, anode is connected respectively to two inputs of EMI filter circuit, 3 pin of described control chip IW3602 also connect the direct current seedbed by a filter capacitor, described control chip L6561D connects circuit of power factor correction, and described control chip IW3602 connects the BUCK circuit.
2. described a kind of LED thyristor regulating light drive circuit based on the IW3602 chip according to claim 1, it is characterized in that: described bleeder circuit comprises the first divider resistance, the second divider resistance and the 3rd divider resistance, described the first divider resistance is connected between 3 pin of the positive pole of input DC power and control chip L6561D, the second divider resistance be connected between 3 pin and input DC power negative pole of control chip L6561D after the 3rd divider resistance is connected, be connected described pressure limiting circuit at the second divider resistance with the series connection node of the 3rd divider resistance, between 3 pin of control chip L6561D and input DC power negative pole, also be connected an electric capacity of voltage regulation.
3. described a kind of LED thyristor regulating light drive circuit based on the IW3602 chip according to claim 2; it is characterized in that: described pressure limiting circuit comprises the first pressure limiting resistance, the second pressure limiting resistance and protection diode; between 1 pin of described the first pressure limiting resistance and the series connection node that is connected to described the second divider resistance and the 3rd divider resistance after the second pressure limiting resistance is connected and control chip IW3602, on the anodic bonding first pressure limiting resistance of described protection diode and the second pressure limiting resistance series connection node, negative electrode is connected the input DC power negative pole.
4. described a kind of LED thyristor regulating light drive circuit based on the IW3602 chip according to claim 1, it is characterized in that: the switching tube of described BUCK circuit is MOSFET.
5. described a kind of LED thyristor regulating light drive circuit based on the IW3602 chip according to claim 4, it is characterized in that: the output of described control chip IW3602 is connected to the MOSFET grid by resistance, described resistance is divided into first grid resistance and second grid resistance, described first grid resistance connect control chip IW3602 7 pin and be connected to the MOSFET grid after second grid resistance is connected, also comprise a PNP triode, the base stage of described PNP triode connects 7 pin of control chip IW3602, emitter is connected on the series connection node of first grid resistance and second grid resistance, collector electrode connects the MOSFET source electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220556042 CN202907287U (en) | 2012-10-26 | 2012-10-26 | LED silicon-controlled light-dimming driving circuit based on IW3602 chip |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220556042 CN202907287U (en) | 2012-10-26 | 2012-10-26 | LED silicon-controlled light-dimming driving circuit based on IW3602 chip |
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| CN202907287U true CN202907287U (en) | 2013-04-24 |
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| CN 201220556042 Expired - Fee Related CN202907287U (en) | 2012-10-26 | 2012-10-26 | LED silicon-controlled light-dimming driving circuit based on IW3602 chip |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104703351A (en) * | 2015-03-16 | 2015-06-10 | 海宁前程照明有限公司 | LED driving circuit used for dimming |
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2012
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104703351A (en) * | 2015-03-16 | 2015-06-10 | 海宁前程照明有限公司 | LED driving circuit used for dimming |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20151026 |
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| EXPY | Termination of patent right or utility model |