CN221058465U - LED lamp circuit with automatic control function - Google Patents
LED lamp circuit with automatic control function Download PDFInfo
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- CN221058465U CN221058465U CN202322466836.8U CN202322466836U CN221058465U CN 221058465 U CN221058465 U CN 221058465U CN 202322466836 U CN202322466836 U CN 202322466836U CN 221058465 U CN221058465 U CN 221058465U
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Abstract
The utility model discloses an LED lamp circuit with an automatic control function, which comprises an alternating current-direct current conversion circuit, an LED light-emitting module, a dimming conversion circuit, a sensor module and a voltage stabilizing circuit, wherein the alternating current-direct current conversion circuit is used for converting alternating current voltage of mains supply into direct current voltage and outputting the direct current voltage to the dimming conversion circuit; the advantages are smaller size and lower cost.
Description
Technical Field
The utility model relates to an LED lamp circuit, in particular to an LED lamp circuit with an automatic control function.
Background
The LED lamp with the automatic control function can automatically adjust the luminous brightness of the LED luminous module in the LED lamp according to a set rule, or can be changed between a light-on state and a light-off state, or can be changed between a strong light state and a weak light state.
As shown in fig. 1, a conventional LED lamp circuit with an automatic control function generally includes an ac/dc conversion circuit, a constant current conversion circuit, an LED light emitting module, an auxiliary power supply, and a sensor module. The alternating current-direct current conversion circuit is used for being connected with mains supply and converting the alternating current voltage of the mains supply into direct current voltage to be output to the constant current conversion circuit, the sensor module is used for detecting whether people exist around and outputting corresponding electric signals to the constant current conversion circuit according to detection results, the auxiliary power supply is used for being connected with the mains supply and converting the alternating current voltage of the mains supply into direct current voltage required by the operation of the sensor module to supply power for the sensor module, the constant current conversion circuit is a switch conversion circuit for converting the direct current voltage into direct current, the switch conversion circuit is used for converting the connected direct current voltage into direct current with corresponding magnitude under the control of the electric signals output by the sensor module and outputting the direct current to the LED light-emitting module. Thus, the direct current output by the constant current conversion circuit can be set correspondingly according to the electric signal output by the sensor module when the sensor module detects the existence of a person and the electric signal output by the sensor module when the sensor module detects the absence of a person. If the LED lamp with the automatic control function is to be converted between two states of lighting and lighting-off, the constant current conversion circuit is set to output direct current which is not 0 when people exist, the direct current is set according to the actual luminous intensity requirement, the constant current conversion circuit is set to output direct current which is 0 when people do not exist, if the LED lamp with the automatic control function is to be converted between two states of strong light and weak light, the constant current conversion circuit is set to output large current when people exist, the LED luminous module emits strong light, the constant current conversion circuit is set to output small current when people do not exist, and the LED luminous module emits weak light, and the large current and the small current are set according to the actual luminous intensity requirement. In the above-mentioned LED lamp circuit with automatic control function, when the ac/dc conversion circuit and the auxiliary power supply are connected to the mains supply and ac voltage is connected to the mains supply, the auxiliary power supply outputs dc voltage required by the operation of the sensor module to the sensor module, the sensor module works to detect whether there is a person around in real time, and outputs a corresponding electric signal to the constant current conversion circuit according to the detection result, and at the same time, the ac/dc conversion circuit outputs dc voltage to the constant current conversion circuit, and the constant current conversion circuit outputs a corresponding amount of dc current to drive the LED lighting module to emit light or not to emit light under the control of the electric signal output by the sensor module.
The LED lamp with the automatic control function, which is realized by the LED lamp circuit with the automatic control function, can bring better application experience to users, and has been widely applied. However, the above-mentioned LED lamp circuit with automatic control function requires an auxiliary power supply for providing the working voltage for the sensor module, and the auxiliary power supply converts the ac voltage of the mains supply into the dc voltage required by the operation of the sensor module in the form of switch conversion, which has a complex circuit structure, occupies a larger circuit PCB area, results in a larger LED lamp circuit size, and increases more cost.
Disclosure of Invention
The utility model aims to provide an LED lamp circuit with an automatic control function, which is small in size and low in cost. The LED lamp circuit adopts the voltage stabilizing circuit realized by the linear transformation voltage stabilizing mode to replace an auxiliary power supply to supply power to the sensor module, and has simple structure and small occupied circuit PCB area.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a LED lamp circuit with automatic control function, includes alternating current-direct current conversion circuit, LED lighting module, dimming conversion circuit and sensor module, alternating current-direct current conversion circuit be used for with commercial power alternating voltage conversion to direct current voltage output to dimming conversion circuit, sensor module be used for detecting whether someone is around to produce corresponding electrical signal output according to the testing result, dimming conversion circuit have constant current mode, in constant current mode, dimming conversion circuit be used for according to the electrical signal of sensor module output, output corresponding direct current to LED lighting module, and this direct current size varies with the difference of the electrical signal of sensor module output, LED lamp circuit still include voltage stabilizing circuit, voltage stabilizing circuit be used for follow dimming conversion circuit department obtain voltage to the required operating voltage of sensor module supplies power for the sensor module.
The dimming conversion circuit is also provided with a constant-voltage working mode, under the constant-voltage working mode, the dimming conversion circuit is used for outputting a fixed voltage smaller than the working voltage of the LED light-emitting module so that the LED light-emitting module does not emit light, the LED lamp circuit also comprises a mode selection circuit, the mode selection circuit is arranged between the sensor module and the dimming conversion circuit, and the mode selection circuit is used for setting the working state of the dimming conversion circuit to be the constant-voltage working mode or the constant-current working mode and the magnitude of direct current output during the constant-current working mode according to the electric signal output by the sensor module.
The alternating current-direct current conversion circuit is provided with a first input end, a second input end, a positive output end and a negative output end; the LED light-emitting module is provided with an anode and a cathode; the sensor module is provided with an anode, a cathode and an output end; the voltage stabilizing circuit is provided with an input end, an output end and a negative electrode; the dimming conversion circuit is provided with a positive electrode, a negative electrode, a positive output end, a negative output end, a control end and a voltage output end; the mode selection circuit is provided with an input end, an output end and a cathode; the first input end and the second input end of the alternating current-direct current conversion circuit are used for being connected with alternating current voltage of a commercial power, the positive electrode of the dimming conversion circuit is connected with the positive output end of the alternating current-direct current conversion circuit, the positive electrode of the LED light emitting module is connected with the positive output end of the dimming conversion circuit, the negative electrode of the LED light emitting module is connected with the negative output end of the dimming conversion circuit, the positive electrode of the sensor module is connected with the output end of the voltage stabilizing circuit, the input end of the voltage stabilizing circuit is connected with the voltage output end of the dimming conversion circuit, the output end of the sensor module is connected with the input end of the mode selection circuit, the output end of the mode selection circuit is connected with the control end of the dimming conversion circuit, and the negative electrode of the mode selection circuit, the negative electrode of the sensor module, the negative electrode of the voltage stabilizing circuit, the negative electrode of the dimming conversion circuit and the negative output end of the alternating current-direct current conversion circuit are connected.
The dimming conversion circuit comprises a first integrated circuit with the model of BP3179D, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first diode, a second diode, a third diode, a fourth diode, a triode, a MOS (metal oxide semiconductor) and a first transformer, wherein the first capacitor, the second capacitor, the third capacitor and the sixth capacitor are electrolytic capacitors, the second diode is a voltage stabilizing diode, the first diode, The third diode and the fourth diode are rectifier diodes, the first transformer is provided with three coils which are a primary coil, a secondary coil and an auxiliary coil respectively, one end of the primary coil, one end of the fourth resistor, one end of the seventh resistor, one end of the fifth capacitor and the positive electrode of the first capacitor are connected, the connecting end of the third diode and the fourth diode is the positive electrode of the dimming conversion circuit, the other end of the seventh resistor, the other end of the fifth capacitor and the negative electrode of the third diode are connected, the positive electrode of the third diode, the drain electrode of the MOS tube and the other end of the primary coil are connected, one end of the secondary coil is connected with the positive electrode of the fourth diode, the negative electrode of the fourth diode, one end of the ninth resistor and the positive electrode of the sixth capacitor are connected, the connecting end of the fourth diode is the positive output end of the dimming conversion circuit, the other end of the secondary coil, the other end of the ninth resistor and the negative electrode of the sixth capacitor are connected, the connecting end of the secondary coil is the negative output end of the dimming conversion circuit, one end of the auxiliary coil, one end of the first resistor and the positive electrode of the first diode are connected, the other end of the first resistor, one end of the second resistor and the 3 rd pin of the first integrated circuit are connected, the negative electrode of the first diode, the positive electrode of the second capacitor, one end of the third resistor and the collector electrode of the triode are connected, the other end of the third resistor, the negative electrode of the second diode and the base electrode of the triode are connected, the emitter electrode of the triode, the positive electrode of the third capacitor, the other end of the fourth resistor, one end of the fifth resistor, the 1 st pin of the first integrated circuit and the 8 th pin of the first integrated circuit are connected, the connecting end of the fifth resistor is the voltage output end of the dimming conversion circuit, one end of the fifth resistor and the 2 nd pin of the first integrated circuit are connected, one end of the fourth capacitor is connected with the 4 th pin of the first integrated circuit, the connection end of the fourth capacitor is the control end of the dimming conversion circuit, the grid electrode of the MOS tube is connected with the 7 th pin of the first integrated circuit, the source electrode of the MOS tube, one end of the eighth resistor is connected with the 6 th pin of the first integrated circuit, the other end of the second resistor, the other end of the sixth resistor, the other end of the eighth resistor, the negative electrode of the second capacitor, the negative electrode of the third capacitor, the other end of the fourth capacitor, the positive electrode of the second diode, the 5 th pin of the first integrated circuit, The other end of the auxiliary coil is connected with the negative electrode of the first capacitor, and the connecting end of the auxiliary coil is the negative electrode of the dimming conversion circuit.
The voltage stabilizing circuit comprises a second integrated circuit, a seventh capacitor and an eighth capacitor, wherein the second integrated circuit is realized by adopting a three-terminal voltage stabilizer and is provided with a voltage input end, a voltage output end and a negative electrode, the voltage input end of the second integrated circuit is connected with one end of the seventh capacitor, the connecting end of the voltage input end is the input end of the voltage stabilizing circuit, the voltage output end of the second integrated circuit is connected with one end of the eighth capacitor, the connecting end of the voltage stabilizing circuit is the output end of the voltage stabilizing circuit, the other end of the seventh capacitor, the other end of the eighth capacitor and the negative electrode of the second integrated circuit are connected, and the connecting end of the voltage stabilizing circuit is the negative electrode of the voltage stabilizing circuit.
The electric signal output by the sensor module is a level signal, when the electric signal output by the sensor module is at a high level, the voltage of the output end is equal to the voltage output by the voltage stabilizing circuit, and when the electric signal output by the sensor module is at a low level, the voltage of the output end is 0.
The mode selection circuit comprises a tenth resistor, an eleventh resistor and a first switch, wherein one end of the tenth resistor is connected with one end of the first switch, the connecting end of the tenth resistor is the input end of the mode selection circuit, the other end of the tenth resistor, one end of the eleventh resistor and the other end of the first switch are connected, the connecting end of the eleventh resistor is the output end of the mode selection circuit, and the other end of the eleventh resistor is the negative electrode of the mode selection circuit.
Compared with the prior art, the utility model has the advantages that the auxiliary power supply is replaced by the voltage stabilizing circuit to supply power to the sensor module, the voltage stabilizing circuit can directly acquire voltage from the dimming conversion circuit and convert the voltage into working voltage required by the sensor module, and the voltage stabilizing circuit adopts a circuit structure realized by adopting a linear conversion voltage stabilizing mode, so that the circuit structure is simpler than the circuit structure realized by adopting a switching conversion mode, the occupied circuit PCB area is smaller, and the whole size of the LED lamp circuit is smaller, and the cost is lower.
Drawings
FIG. 1 is a schematic block diagram of a conventional LED lamp circuit with automatic control;
Fig. 2 is a schematic block diagram of an LED lamp circuit with an automatic control function according to a first embodiment of the present utility model;
FIG. 3 is a schematic block diagram of an LED lamp circuit with an automatic control function according to a second embodiment of the present utility model;
Fig. 4 is a circuit diagram of an LED lamp circuit with an automatic control function according to the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
Embodiment one: as shown in fig. 2, an LED lamp circuit with an automatic control function includes an ac/dc conversion circuit, an LED light emitting module, a dimming conversion circuit, and a sensor module M1, where the ac/dc conversion circuit is configured to convert ac voltage of a mains supply into dc voltage and output the dc voltage to the dimming conversion circuit, the sensor module M1 is configured to detect whether a person is around and generate a corresponding electrical signal output according to a detection result, the dimming conversion circuit has a constant current operation mode, in which the dimming conversion circuit is configured to output a corresponding dc current to the LED light emitting module according to the electrical signal output by the sensor module M1, and the dc current varies with the electrical signal output by the sensor module M1, and the LED lamp circuit further includes a voltage stabilizing circuit configured to obtain a voltage from the dimming conversion circuit and convert the voltage into an operation voltage required by the sensor module M1 to supply power to the sensor module M1.
In this embodiment, the voltage stabilizing circuit has a circuit structure implemented by adopting a linear transformation voltage stabilizing mode.
Embodiment two: this embodiment is substantially the same as embodiment one, except that: as shown in fig. 3, in this embodiment, the dimming conversion circuit further has a constant voltage operation mode, in which the dimming conversion circuit is configured to output a fixed voltage smaller than an operation voltage of the LED lighting module, so that the LED lighting module does not emit light, and the LED lamp circuit further includes a mode selection circuit disposed between the sensor module M1 and the dimming conversion circuit, and the mode selection circuit is configured to set an operation state of the dimming conversion circuit to be a constant voltage operation mode or a constant current operation mode according to an electrical signal output by the sensor module M1, and a magnitude of a direct current output in the constant current operation mode.
In this embodiment, the ac-dc conversion circuit has a first input terminal, a second input terminal, a positive output terminal, and a negative output terminal; the LED light-emitting module is provided with an anode and a cathode; the sensor module M1 is provided with a positive electrode, a negative electrode and an output end; the voltage stabilizing circuit is provided with an input end, an output end and a cathode; the dimming conversion circuit is provided with a positive electrode, a negative electrode, a positive output end, a negative output end, a control end and a voltage output end; the mode selection circuit is provided with an input end, an output end and a cathode; the first input end and the second input end of the alternating current-direct current conversion circuit are used for being connected with the alternating current voltage of the commercial power, the positive electrode of the dimming conversion circuit is connected with the positive output end of the alternating current-direct current conversion circuit, the positive electrode of the LED light emitting module is connected with the positive output end of the dimming conversion circuit, the negative electrode of the LED light emitting module is connected with the negative output end of the dimming conversion circuit, the positive electrode of the sensor module M1 is connected with the output end of the voltage stabilizing circuit, the input end of the voltage stabilizing circuit is connected with the voltage output end of the dimming conversion circuit, the output end of the sensor module M1 is connected with the input end of the mode selection circuit, the negative electrode of the sensor module M1, the negative electrode of the voltage stabilizing circuit, the negative electrode of the dimming conversion circuit and the negative output end of the alternating current-direct current conversion circuit.
The LED lamp circuit with automatic control function of this embodiment can pre-select the light-on/light-off conversion mode or the strong light/weak light conversion mode before installation and use, when the first input end and the second input end of the ac/dc conversion circuit are connected to the ac voltage of the mains supply, the dc voltage is output between the positive output end and the negative output end of the ac/dc conversion circuit, after the dc voltage is connected between the positive electrode and the negative electrode of the dimming conversion circuit, the voltage output end of the dimming conversion circuit outputs a voltage far smaller than the ac voltage of the mains supply, the voltage is converted into a dc voltage required by the operation of the sensor module M1 through the voltage stabilizing circuit, the sensor module M1 detects whether a person is around in real time and outputs a corresponding electrical signal at the output end thereof according to the detection result of whether the person is present, the mode selection circuit converts the electrical signal to obtain a preset setting signal output corresponding to the electrical signal, if the LED lamp circuit is in a light-on/light-off conversion mode, when the sensor module M1 outputs an electrical signal with a person, the setting signal output by the mode selection circuit sets the light-adjusting conversion circuit to work in a constant-current working mode, at the moment, the light-adjusting conversion circuit outputs a preset direct current corresponding to the light-adjusting conversion circuit, the LED light-emitting module is driven to emit light, the direct current is set according to the actual use requirement, when the sensor module M1 outputs an electrical signal without a person, the setting signal output by the mode selection circuit sets the light-adjusting conversion circuit to work in a constant-voltage working mode, the light-adjusting conversion circuit outputs a preset fixed voltage, so that the LED light-emitting module does not emit light, if the LED lamp circuit is in a strong light/weak light conversion mode, when the sensor module M1 outputs an electrical signal with a person, the setting signal output by the mode selection circuit sets the light-adjusting conversion circuit to work in a constant-current working mode, the dimming conversion circuit outputs a preset heavy current corresponding to the dimming conversion circuit to drive the LED light-emitting module to emit strong light, when the sensor module M1 outputs an electrical signal without a person, the setting signal output by the mode selection circuit sets the dimming conversion circuit to work in a constant-current working mode, the dimming conversion circuit outputs a preset light current corresponding to the dimming conversion circuit to drive the LED light-emitting module to emit weak light, wherein the magnitudes of the heavy current and the light current are set according to actual use requirements, and therefore the LED lamp circuit can be set into a bright/off conversion mode for converting between a bright lamp and a dark lamp or into a strong/weak light conversion mode for converting between the strong light and the weak light according to the actual use requirements, and a user can select according to the actual use requirements.
Embodiment III: this embodiment is basically the same as the second embodiment, except that: as shown in fig. 4, in the present embodiment, the dimming conversion circuit includes a first integrated circuit U1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, The triode Q1, the MOS tube Q2 and the first transformer T1, the first capacitor C1, the second capacitor C2, the third capacitor C3 and the sixth capacitor C6 are electrolytic capacitors, the second diode D2 is a voltage stabilizing diode, the first diode D1, the third diode D3 and the fourth diode D4 are rectifier diodes, the first transformer T1 is provided with three coils which are a primary coil Np, a secondary coil Ns and an auxiliary coil Na respectively, one end of the primary coil Np, one end of the fourth resistor R4, one end of the seventh resistor R7, one end of the fifth capacitor C5 and the positive electrode of the first capacitor C1 are connected, and the connecting end is the positive electrode of the dimming conversion circuit, the other end of the seventh resistor R7, the other end of the fifth capacitor C5 and the negative electrode of the third diode D3 are connected, the positive electrode of the third diode D3, the drain electrode of the MOS tube Q2 and the other end of the primary coil Np are connected, one end of the secondary coil Ns is connected with the positive electrode of the fourth diode D4, the negative electrode of the fourth diode D4, one end of the ninth resistor R9 and the positive electrode of the sixth capacitor C6 are connected, the connection end is the positive output end of the dimming conversion circuit, the other end of the secondary coil Ns, the other end of the ninth resistor R9 and the negative electrode of the sixth capacitor C6 are connected, the connection end is the negative output end of the dimming conversion circuit, one end of the auxiliary coil Na, One end of the first resistor R1 is connected with the positive electrode of the first diode D1, the other end of the first resistor R1, one end of the second resistor R2 is connected with the 3 rd pin of the first integrated circuit U1, the negative electrode of the first diode D1, the positive electrode of the second capacitor C2, one end of the third resistor R3 is connected with the collector electrode of the triode Q1, the other end of the third resistor R3, the negative electrode of the second diode D2 is connected with the base electrode of the triode Q1, the emitter electrode of the triode Q1, the positive electrode of the third capacitor C3, the other end of the fourth resistor R4, one end of the fifth resistor R5, the 1 st pin of the first integrated circuit U1 and the 8 th pin of the first integrated circuit U1 are connected, the connection end is the voltage output end of the dimming conversion circuit, the other end of the fifth resistor R5, one end of the sixth resistor R6 and the 2 nd pin of the first integrated circuit U1 are connected, one end of the fourth capacitor C4 is connected with the 4 th pin of the first integrated circuit U1, the connection end is the control end of the dimming conversion circuit, the grid electrode of the MOS tube Q2 is connected with the 7 th pin of the first integrated circuit U1, the source electrode of the MOS tube Q2, one end of the eighth resistor R8 and the 6 th pin of the first integrated circuit U1 are connected, the other end of the second resistor R2, the other end of the sixth resistor R6, the other end of the eighth resistor R8, the negative electrode of the second capacitor C2, the negative electrode of the third capacitor C3, The other end of the fourth capacitor C4, the positive electrode of the second diode D2, the 5 th pin of the first integrated circuit U1, the other end of the auxiliary coil Na and the negative electrode of the first capacitor C1 are connected, and the connecting end of the fourth capacitor C4 is the negative electrode of the dimming conversion circuit.
In this embodiment, in the dimming conversion circuit, the auxiliary coil Na of the first transformer T1 provides a low-voltage high-frequency ac voltage, and outputs a dc voltage after being converted by the rectifying and voltage stabilizing circuit, where the dc voltage not only provides a working voltage for the first integrated circuit U1, but also provides an input dc voltage for the voltage stabilizing circuit, which further simplifies the circuit structure and reduces the cost, and meanwhile, an analog signal is used as an electrical signal for dimming of the dimming conversion circuit, so that the dimming conversion circuit can adapt to an electrical signal output by the conventional sensor module M1 in a larger range.
Embodiment four: this embodiment is substantially the same as embodiment three except that: as shown in fig. 4, in this embodiment, the voltage stabilizing circuit includes a second integrated circuit U2, a seventh capacitor C7 and an eighth capacitor C8, where the second integrated circuit U2 is implemented by a three-terminal voltage stabilizer, and has a voltage input end, a voltage output end and a negative electrode, the voltage input end of the second integrated circuit U2 is connected to one end of the seventh capacitor C7, and the connection end is an input end of the voltage stabilizing circuit, the voltage output end of the second integrated circuit U2 is connected to one end of the eighth capacitor C8, and the connection end is an output end of the voltage stabilizing circuit, the other end of the seventh capacitor C7, the other end of the eighth capacitor C8 and the negative electrode of the second integrated circuit U2 are connected, and the connection end is a negative electrode of the voltage stabilizing circuit.
In this embodiment, the electrical signal output by the sensor module M1 is a level signal, when the electrical signal output by the sensor module M1 is at a high level, the voltage at the output end is equal to the voltage output by the voltage stabilizing circuit, and when the electrical signal output by the sensor module M1 is at a low level, the voltage at the output end is 0.
As shown in fig. 4, in the present embodiment, the mode selection circuit includes a tenth resistor R10, an eleventh resistor R11, and a first switch S1, wherein one end of the tenth resistor R10 is connected to one end of the first switch S1, and the connection end thereof is an input end of the mode selection circuit, the other end of the tenth resistor R10, one end of the eleventh resistor R11, and the other end of the first switch S1 are connected, and the connection end thereof is an output end of the mode selection circuit, and the other end of the eleventh resistor R11 is a negative electrode of the mode selection circuit.
Claims (5)
1. The LED lamp circuit with the automatic control function comprises an alternating current-direct current conversion circuit, an LED light-emitting module, a dimming conversion circuit and a sensor module, wherein the alternating current-direct current conversion circuit is used for converting alternating current voltage of mains supply into direct current voltage and outputting the direct current voltage to the dimming conversion circuit, the sensor module is used for detecting whether people exist around and generating corresponding electric signal output according to a detection result, the dimming conversion circuit is provided with a constant current working mode, in the constant current working mode, the dimming conversion circuit is used for outputting corresponding direct current to the LED light-emitting module according to the electric signal output by the sensor module, and the direct current is different according to the electric signal output by the sensor module, and the LED lamp circuit is characterized by further comprising a voltage stabilizing circuit, wherein the voltage stabilizing circuit is used for acquiring voltage from the dimming conversion circuit and converting the voltage into the working voltage required by the sensor module to supply power for the sensor module;
The light modulation conversion circuit is also provided with a constant voltage working mode, in the constant voltage working mode, the light modulation conversion circuit is used for outputting a fixed voltage smaller than the working voltage of the LED light emitting module so that the LED light emitting module does not emit light, the LED lamp circuit also comprises a mode selection circuit, the mode selection circuit is arranged between the sensor module and the light modulation conversion circuit, and the mode selection circuit is used for setting the working state of the light modulation conversion circuit to be the constant voltage working mode or the constant current working mode according to the electric signal output by the sensor module and setting the direct current output by the light modulation conversion circuit in the constant current working mode;
The alternating current-direct current conversion circuit is provided with a first input end, a second input end, a positive output end and a negative output end; the LED light-emitting module is provided with an anode and a cathode; the sensor module is provided with an anode, a cathode and an output end; the voltage stabilizing circuit is provided with an input end, an output end and a negative electrode; the dimming conversion circuit is provided with a positive electrode, a negative electrode, a positive output end, a negative output end, a control end and a voltage output end; the mode selection circuit is provided with an input end, an output end and a cathode; the first input end and the second input end of the alternating current-direct current conversion circuit are used for being connected with alternating current voltage of a commercial power, the positive electrode of the dimming conversion circuit is connected with the positive output end of the alternating current-direct current conversion circuit, the positive electrode of the LED light emitting module is connected with the positive output end of the dimming conversion circuit, the negative electrode of the LED light emitting module is connected with the negative output end of the dimming conversion circuit, the positive electrode of the sensor module is connected with the output end of the voltage stabilizing circuit, the input end of the voltage stabilizing circuit is connected with the voltage output end of the dimming conversion circuit, the output end of the sensor module is connected with the input end of the mode selection circuit, the output end of the mode selection circuit is connected with the control end of the dimming conversion circuit, and the negative electrode of the mode selection circuit, the negative electrode of the sensor module, the negative electrode of the voltage stabilizing circuit, the negative electrode of the dimming conversion circuit and the negative output end of the alternating current-direct current conversion circuit are connected.
2. The LED lamp circuit with automatic control function according to claim 1, wherein the dimming conversion circuit comprises a first integrated circuit having a model BP3179D, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first diode, a second diode, a third diode, a fourth diode, a triode, a MOS tube and a first transformer, wherein the first capacitor, the second capacitor, the third capacitor and the sixth capacitor are electrolytic capacitors, the second diode is a zener diode, the first diode, the third diode and the fourth diode are rectifier diodes, the first transformer is provided with three coils which are a primary coil, a secondary coil and an auxiliary coil respectively, one end of the primary coil, one end of the fourth resistor, one end of the seventh resistor, one end of the fifth capacitor and the positive electrode of the first capacitor are connected, the connecting end of the seventh resistor is the positive electrode of the dimming conversion circuit, the other end of the seventh resistor, the other end of the fifth capacitor and the negative electrode of the third diode are connected, the positive electrode of the third diode, The drain electrode of the MOS tube is connected with the other end of the primary coil, one end of the secondary coil is connected with the positive electrode of the fourth diode, the negative electrode of the fourth diode, one end of the ninth resistor and the positive electrode of the sixth capacitor are connected, the connecting end of the fourth diode is the positive output end of the dimming conversion circuit, the other end of the secondary coil, the other end of the ninth resistor and the negative electrode of the sixth capacitor are connected, the connecting end of the second diode is the negative output end of the dimming conversion circuit, one end of the auxiliary coil, one end of the first resistor and the positive electrode of the first diode are connected, the other end of the first resistor, one end of the second resistor and the 3 rd pin of the first integrated circuit are connected, the negative electrode of the first diode, the positive electrode of the second capacitor, one end of the third resistor and the collector electrode of the triode are connected, the other end of the third resistor, the negative electrode of the second diode and the base electrode of the triode are connected, the emitter electrode of the triode, the positive electrode of the third capacitor, the other end of the fourth resistor, one end of the fifth resistor, the 1 st pin of the first integrated circuit and the 8 th pin of the first integrated circuit are connected, and the connecting end is the voltage output end of the dimming conversion circuit, the other end of the fifth resistor, one end of the sixth resistor and the 2 nd pin of the first integrated circuit are connected, one end of the fourth capacitor is connected with the 4 th pin of the first integrated circuit, the connection end of the fourth capacitor is the control end of the dimming conversion circuit, the grid electrode of the MOS tube is connected with the 7 th pin of the first integrated circuit, the source electrode of the MOS tube, one end of the eighth resistor and the 6 th pin of the first integrated circuit are connected, the other end of the second resistor, the other end of the sixth resistor, the other end of the eighth resistor, the negative electrode of the second capacitor, the negative electrode of the third capacitor, The other end of the fourth capacitor, the positive electrode of the second diode, the 5 th pin of the first integrated circuit, the other end of the auxiliary coil and the negative electrode of the first capacitor are connected, and the connecting end of the auxiliary coil is the negative electrode of the dimming conversion circuit.
3. The LED lamp circuit with the automatic control function according to claim 1, wherein the voltage stabilizing circuit comprises a second integrated circuit, a seventh capacitor and an eighth capacitor, the second integrated circuit is realized by a three-terminal voltage stabilizer and is provided with a voltage input end, a voltage output end and a negative electrode, the voltage input end of the second integrated circuit is connected with one end of the seventh capacitor, the connection end of the voltage input end of the voltage stabilizing circuit is connected with one end of the eighth capacitor, the connection end of the voltage output end of the second integrated circuit is connected with the output end of the voltage stabilizing circuit, the other end of the seventh capacitor, the other end of the eighth capacitor and the negative electrode of the second integrated circuit are connected, and the connection end of the voltage stabilizing circuit is the negative electrode of the voltage stabilizing circuit.
4. The LED lamp circuit with automatic control function according to claim 1, wherein the electrical signal output by the sensor module is a level signal, when the electrical signal output by the sensor module is at a high level, the voltage at the output end is equal to the voltage output by the voltage stabilizing circuit, and when the electrical signal output by the sensor module is at a low level, the voltage at the output end is 0.
5. The LED lamp circuit with automatic control function according to claim 1, wherein the mode selection circuit comprises a tenth resistor, an eleventh resistor and a first switch, one end of the tenth resistor is connected to one end of the first switch, the connection end is the input end of the mode selection circuit, the other end of the tenth resistor, one end of the eleventh resistor is connected to the other end of the first switch, the connection end is the output end of the mode selection circuit, and the other end of the eleventh resistor is the negative electrode of the mode selection circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322466836.8U CN221058465U (en) | 2023-09-12 | 2023-09-12 | LED lamp circuit with automatic control function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322466836.8U CN221058465U (en) | 2023-09-12 | 2023-09-12 | LED lamp circuit with automatic control function |
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