CN217985471U - Linear LED lamp circuit used by low-frequency flash wide voltage - Google Patents
Linear LED lamp circuit used by low-frequency flash wide voltage Download PDFInfo
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- CN217985471U CN217985471U CN202221120766.XU CN202221120766U CN217985471U CN 217985471 U CN217985471 U CN 217985471U CN 202221120766 U CN202221120766 U CN 202221120766U CN 217985471 U CN217985471 U CN 217985471U
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Abstract
The utility model discloses a linear LED lamp circuit that wide voltage of low-frequency flash used, including rectification filter circuit, the linear constant current circuit of two sections, first LED lighting circuit, second LED lighting circuit and linear stroboscopic circuit that goes, the positive pole of first LED lighting circuit and rectification filter circuit's positive output are connected, the negative pole of first LED lighting circuit, the positive pole of second LED lighting circuit and the positive pole of linear stroboscopic circuit that goes all are connected with the first output of the linear constant current circuit of two sections, the negative pole of the linear constant current circuit of two sections and rectification filter circuit's negative output are connected, the negative pole of linear stroboscopic circuit that goes and the second output of the linear constant current circuit of two sections are connected, the output of linear stroboscopic circuit that goes and the negative pole of second LED lighting circuit are connected; the advantages are that the low stroboflash or no stroboflash can be kept to emit light in practical application, and the light stroboflash with large brightness change can not occur.
Description
Technical Field
The utility model relates to a linear LED lamp circuit especially relates to a linear LED lamp circuit that wide voltage used.
Background
The linear LED lamp circuit used by the existing wide voltage generally comprises a rectifying filter circuit, a two-section linear constant current circuit, a first LED light-emitting circuit and a second LED light-emitting circuit, wherein the rectifying filter circuit is provided with a first input end, a second input end, a positive output end and a negative output end, when an alternating current voltage is connected between the first input end and the second input end, the voltage output between the positive output end and the negative output end is a direct current voltage which periodically changes along with the alternating current voltage, the maximum voltage output between the positive output end and the negative output end is an alternating current voltage peak value voltage, the minimum voltage is a periodically fluctuating direct current voltage which is not zero, the two-section linear constant current circuit is provided with a first output end, a second output end and a negative electrode, the first LED light-emitting circuit and the second LED light-emitting circuit are both provided with a positive electrode and a negative electrode, the luminous intensity of the first LED light-emitting circuit and the luminous intensity of the second LED light-emitting circuit are in direct proportion to the magnitude of the current flowing through the positive electrode and the negative electrode of the first LED light-emitting circuit, the positive electrode of the first LED light-emitting circuit and the second LED light-emitting circuit are connected with the negative electrode of the rectifying filter circuit, and the two-section linear constant current circuit, and the negative electrode of the two-emitting circuit are connected with the rectifying filter circuit, and the two-section linear constant current output end of the two-current filter circuit.
When the instantaneous value of the direct-current voltage output between the positive output end and the negative output end of the rectification filter circuit is larger than the sum of the working voltages of the first LED light-emitting circuit and the second LED light-emitting circuit, the second output end of the double-section linear constant-current circuit is conducted, the first output end of the double-section linear constant-current circuit is cut off, and the first LED light-emitting circuit and the second LED light-emitting circuit are driven by the current output by the second output end of the double-section linear constant-current circuit to emit light; when the instantaneous value of the direct current voltage output between the positive output end and the negative output end of the rectification filter circuit is less than or equal to the sum of the working voltages of the first LED light-emitting circuit and the second LED light-emitting circuit and is greater than the working voltage of the first LED light-emitting circuit, the current of the second output end of the double-section linear constant current circuit is 0, the first output end of the double-section linear constant current circuit is conducted, the first LED light-emitting circuit emits light under the driving of the current output by the first output end of the double-section linear constant current circuit, and the second LED light-emitting circuit cannot emit light; when the instantaneous value of the direct current voltage output between the positive output end and the negative output end of the rectification filter circuit is smaller than or equal to the working voltage of the first LED light-emitting circuit, the first output end and the second output end of the double-section linear constant current circuit are both cut off, and the first LED light-emitting circuit and the second LED light-emitting circuit cannot emit light.
When the linear LED lamp circuit used by the wide voltage is actually applied, the alternating voltage of the commercial power inevitably fluctuates, the direct current voltage output between the positive output end and the negative output end of the rectifying and filtering circuit is the voltage with high and low periodic variation, the maximum value of the direct current voltage is larger than the sum of the first LED light-emitting voltage and the working voltage of the second light-emitting circuit, and the minimum value of the direct current voltage is smaller than or equal to the sum of the first LED light-emitting voltage and the working voltage of the second light-emitting circuit, so that the linear LED lamp circuit can have two alternate conversion phenomena of simultaneous light emission of the first LED light-emitting circuit and the second LED light-emitting circuit and independent light emission of the first LED light-emitting circuit, and the linear LED lamp circuit used by the wide voltage has light stroboflash with large light-dark variation.
Disclosure of Invention
The utility model aims to solve the technical problem that a linear LED lamp circuit that wide voltage of the stroboscopic low frequency of the great light of bright and dark change used is provided when practical application, can keep low stroboscopic or no stroboscopic luminous, can not appear.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a linear LED lamp circuit used by low-frequency flash wide voltage comprises a rectifying and filtering circuit, a double-section linear constant current circuit, a first LED light-emitting circuit and a second LED light-emitting circuit, wherein the rectifying and filtering circuit is provided with a first input end, a second input end, a positive output end and a negative output end, when alternating current voltage is connected between the first input end and the second input end, the voltage output between the positive output end and the negative output end is direct current voltage which changes periodically along with the alternating current voltage, the maximum voltage output between the positive output end and the negative output end is alternating current voltage peak voltage, the minimum voltage is periodically fluctuating direct current voltage which is not zero, the double-section linear constant current circuit is provided with a first output end, a second output end and a negative electrode, the first LED light-emitting circuit and the second LED light-emitting circuit are both provided with a positive electrode and a negative electrode, the light intensity of the first LED light-emitting circuit and the second LED light-emitting circuit is in direct proportion to the current flowing through the positive electrode and the negative electrode of the first LED light-emitting circuit, the positive electrode of the first LED light-emitting circuit is connected with the positive output end of the rectifying filter circuit, the negative electrode of the first LED light-emitting circuit and the positive electrode of the second LED light-emitting circuit are both connected with the first output end of the two-section linear constant current circuit, the negative electrode of the two-section linear constant current circuit is connected with the negative output end of the rectifying filter circuit, the linear LED lamp circuit used by low stroboscopic wide voltage also comprises a linear stroboscopic removing circuit, the linear stroboscopic removing circuit is provided with a positive electrode, a negative electrode and an output end, when a pulsating current or a constant current is connected between the positive electrode and the negative electrode of the linear stroboscopic removing circuit, the current output by the output end of the linear stroboscopic removing circuit is a constant current, and the constant current is equal to the average current connected between the positive electrode and the negative electrode of the linear stroboscopic removing circuit, the positive electrode of the linear stroboscopic removing circuit is connected with the first output end of the double-section linear constant current circuit, the negative electrode of the linear stroboscopic removing circuit is connected with the second output end of the double-section linear constant current circuit, and the output end of the linear stroboscopic removing circuit is connected with the negative electrode of the second LED light-emitting circuit.
Rectifier filter circuit include full-bridge rectifier bridge heap, first resistance and first electric capacity, first electric capacity be electrolytic capacitor, full-bridge rectifier bridge heap have two AC input ends, positive voltage output and negative voltage output, two AC input ends of full-bridge rectifier bridge heap do respectively rectifier filter circuit's first input and second input, full-bridge rectifier bridge heap the positive voltage output, first resistance one end with the positive pole of first electric capacity connect and its link do rectifier filter circuit's positive output, full-bridge rectifier bridge heap the negative voltage output first resistance the other end with the negative pole of first electric capacity connect and its link do rectifier filter circuit's negative output.
The dual-section linear constant current circuit comprises a first integrated circuit and a second resistor, the reference model of the first integrated circuit is SM2086, the 8 th pin of the first integrated circuit is the first output end of the dual-section linear constant current circuit, the 5 th pin of the first integrated circuit is the second output end of the dual-section linear constant current circuit, the 1 st pin of the first integrated circuit is connected with one end of the second resistor, the other end of the second resistor is connected with the 4 th pin of the first integrated circuit, and the connecting end of the second resistor is the negative electrode of the dual-section linear constant current circuit.
The linear stroboscopic circuit comprises a second integrated circuit, a third resistor, a second capacitor, a third capacitor and a first diode, wherein the second capacitor is an electrolytic capacitor, the first diode is a rectifier diode, the type of the second integrated circuit is SM901, the second integrated circuit is provided with a VC pin, a GND pin and an OUT pin, the anode of the second capacitor is connected with one end of the third resistor, the connecting end of the second capacitor is the anode of the linear stroboscopic circuit, the OUT pin of the second integrated circuit is the output end of the linear stroboscopic circuit, the VC pin of the second integrated circuit is connected with one end of the third capacitor, the other end of the third capacitor, the GND pin of the second integrated circuit, the cathode of the second capacitor is connected with the anode of the first diode, and the cathode of the first diode is the cathode of the linear stroboscopic circuit.
Compared with the prior art, the utility model has the advantages that the linear stroboscopic removing circuit is arranged between the negative pole of the second LED light-emitting circuit and the double-section linear constant current circuit, the second LED light-emitting circuit is not directly connected with the double-section linear constant current circuit, when the first input end and the second input end of the rectifier filter circuit are connected with the mains supply alternating voltage, the voltage output between the positive output end and the negative output end of the rectifier filter circuit changes along with the periodic variation of the mains supply alternating voltage; if the lowest voltage output between the positive output end and the negative output end of the rectifying and filtering circuit is greater than the sum of the working voltage of the first LED light-emitting circuit and the voltage between the positive electrode and the negative electrode of the linear stroboscopic removing circuit, the second output end of the double-section linear constant current circuit is conducted, the first output end is cut off, and under the commercial power alternating current voltage, the currents flowing between the positive electrode and the negative electrode of the first LED light-emitting circuit and the linear stroboscopic removing circuit are the magnitude of the current output by the second output end of the double-section linear constant current circuit, the current output by the output end of the linear stroboscopic removing circuit is the magnitude of the current output by the second output end of the double-end linear constant current circuit, the current driving the first LED light-emitting circuit is equal to the current driving the second LED light-emitting circuit, and the currents are the magnitudes of the current output by the second output end of the double-section linear constant current circuit; if the highest voltage output between the positive output end and the negative output end of the rectifying and filtering circuit is greater than the sum of the working voltage of the first LED light-emitting circuit and the voltage between the positive electrode and the negative electrode of the linear stroboscopic removing circuit, and the lowest voltage output between the positive output end and the negative output end of the rectifying and filtering circuit is less than or equal to the sum of the working voltage of the first LED light-emitting circuit and the voltage between the positive electrode and the negative electrode of the linear stroboscopic removing circuit, when the voltage output between the positive output end and the negative output end of the rectifying and filtering circuit is greater than the sum of the working voltage of the first LED light-emitting circuit and the voltage between the positive electrode and the negative electrode of the linear stroboscopic removing circuit, the currents flowing between the positive electrode and the negative electrode of the first LED light-emitting circuit and the linear stroboscopic removing circuit are the currents output by the second output end of the two-section linear constant current circuit, when the voltage output between the positive output end and the negative output end of the rectifying and filtering circuit is less than or equal to the sum of the working voltage of the first LED light-emitting circuit and the voltage between the positive electrode and the negative electrode of the linear stroboscopic removing circuit, the current flowing through the second output end of the double-section linear constant current circuit is 0, the first output end is conducted, the current flowing through the first LED light-emitting circuit is the current of the first output end of the double-section linear constant current circuit, the current flowing between the positive electrode and the negative electrode of the linear stroboscopic removing circuit is zero, under the voltage of the mains supply alternating current, the current flowing through the second LED light-emitting circuit is equal to the average current connected to the positive electrode and the negative electrode of the linear stroboscopic removing circuit in magnitude, the constant current corresponding to the mains supply alternating current voltage is kept, and the current flowing through the first LED light-emitting circuit is changed between the current magnitude of the first output end of the double-section linear constant current circuit and the current magnitude of the second output end, when the conduction current values of the first output end and the second output end of the double-section linear constant current circuit are set to be equal, the light emitting intensity of the first LED light emitting circuit does not have periodic variation; if the highest voltage output between the positive output end and the negative output end of the rectifying and filtering circuit is less than or equal to the sum of the working voltage of the first LED light-emitting circuit and the working voltage of the second LED light-emitting circuit, and the lowest voltage is greater than the working voltage of the first LED light-emitting circuit, the current of the second output end of the double-section linear constant current circuit is 0, the first output end is conducted, the current of the first LED light-emitting circuit is the current of the first output end of the double-section linear constant current circuit, the light-emitting intensity of the first LED light-emitting circuit is kept constant, and the second LED light-emitting circuit does not emit light; if the highest voltage output between the positive output end and the negative output end of the rectifying and filtering circuit is greater than the working voltage of the first LED light-emitting circuit, and the lowest voltage of the highest voltage is less than or equal to the working voltage of the first LED light-emitting circuit, the current of the second output end of the double-section linear constant current circuit is 0, and when the voltage output between the positive output end and the negative output end of the rectifying and filtering circuit is greater than the working voltage of the first LED light-emitting circuit, the current flowing through the first LED light-emitting circuit is the current of the first output end of the double-section linear constant current circuit, and when the output voltage is less than or equal to the working voltage of the first LED, the first LED light-emitting circuit does not emit light; under the alternating current voltage of the mains supply, the second LED light-emitting circuit keeps not emitting light, but the first LED light-emitting circuit changes in light-emitting intensity; if the highest voltage output between the positive output end and the negative output end of the rectification filter circuit is less than or equal to the working voltage of the first LED light-emitting circuit, the current of the first output end and the second output end of the double-section linear constant current circuit are both zero, and the first LED light-emitting circuit and the LED light-emitting circuit do not emit light at the moment; therefore, the utility model discloses a linear LED lamp circuit that wide voltage of low frequency flash used in the commercial power alternating voltage variation range of broad, first LED lighting circuit and second LED lighting circuit's drive current size does not change along with commercial power alternating voltage periodic variation to the realization can keep low stroboscopic or no stroboscopic luminescence when actual application, the great light stroboscopic of bright and dark change can not appear.
Drawings
Fig. 1 is a schematic diagram of a linear LED lamp circuit used for low-flash wide-voltage according to the present invention;
fig. 2 is a circuit diagram of a linear LED lamp circuit used by the low-flash-width voltage of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
The embodiment is as follows: as shown in fig. 1, a linear LED lamp circuit used for low-frequency flash wide voltage includes a rectifying filter circuit, a two-stage linear constant current circuit, a first LED light emitting circuit LED1 and a second LED light emitting circuit LED2, the rectifying filter circuit has a first input terminal, a second input terminal, a positive output terminal and a negative output terminal, when an ac voltage is connected between the first input terminal and the second input terminal, a voltage output between the positive output terminal and the negative output terminal is a dc voltage that periodically changes with the ac voltage, a maximum voltage output between the positive output terminal and the negative output terminal is an ac voltage peak voltage, a minimum voltage is a periodically fluctuating dc voltage that is not zero, the two-stage linear constant current circuit has a first output terminal, a second output terminal and a negative terminal, the first LED light emitting circuit LED1 and the second LED light emitting circuit LED2 both have a positive terminal and a negative terminal, the light intensity of the first LED light-emitting circuit LED1 and the light intensity of the second LED light-emitting circuit LED2 are in direct proportion to the magnitude of current flowing through the positive electrode and the negative electrode of the first LED light-emitting circuit LED1, the positive electrode of the first LED light-emitting circuit LED1 is connected with the positive output end of the rectification filter circuit, the negative electrode of the first LED light-emitting circuit LED1 and the positive electrode of the second LED light-emitting circuit LED2 are both connected with the first output end of the two-section linear constant current circuit, the negative electrode of the two-section linear constant current circuit is connected with the negative output end of the rectification filter circuit, the linear LED lamp circuit used by low-frequency flash width voltage also comprises a linear stroboscopic removing circuit, the linear stroboscopic removing circuit is provided with a positive electrode, a negative electrode and an output end, when a pulsating current or a constant-magnitude current is connected between the positive electrode and the negative electrode of the linear stroboscopic removing circuit, the constant-magnitude current is equal to the average current connected between the positive electrode and the negative electrode of the linear stroboscopic removing circuit, the positive electrode of the linear stroboscopic circuit is connected with the first output end of the two-stage linear constant current circuit, the negative pole of the linear stroboscopic circuit that removes is connected with the second output of two sections linear constant current circuit, and the output of linear stroboscopic circuit that removes is connected with second LED lighting circuit LED 2's negative pole.
As shown in fig. 2, in this embodiment, the rectifying and filtering circuit includes a full-bridge rectifier bridge stack Db, a first resistor R1 and a first capacitor C1, the first capacitor C1 is an electrolytic capacitor, the full-bridge rectifier bridge stack Db has two ac input terminals, a positive voltage output terminal and a negative voltage output terminal, the two ac input terminals of the full-bridge rectifier bridge stack Db are respectively a first input terminal and a second input terminal of the rectifying and filtering circuit, the positive voltage output terminal of the full-bridge rectifier bridge stack Db, one end of the first resistor R1 is connected with the positive electrode of the first capacitor C1, and the connecting terminal thereof is the positive output terminal of the rectifying and filtering circuit, the negative voltage output terminal of the rectifying and full-bridge stack Db, the other end of the first resistor R1 is connected with the negative electrode of the first capacitor C1, and the connecting terminal thereof is the negative output terminal of the rectifying and filtering circuit.
As shown in fig. 2, in this embodiment, the dual-stage linear constant current circuit includes a first integrated circuit U1 and a second resistor R2, the reference model of the first integrated circuit U1 is SM2086, the 8 th pin of the first integrated circuit U1 is a first output terminal of the dual-stage linear constant current circuit, the 5 th pin of the first integrated circuit U1 is a second output terminal of the dual-stage linear constant current circuit, the 1 st pin of the first integrated circuit U1 is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to the 4 th pin of the first integrated circuit U1, and the connection end of the second resistor R2 is a negative electrode of the dual-stage linear constant current circuit.
As shown in fig. 2, in this embodiment, the linear stroboscopic removing circuit includes a second integrated circuit U2, a third resistor R3, a second capacitor C2, a third capacitor C3 and a first diode D1, the second capacitor C2 is an electrolytic capacitor, the first diode D1 is a rectifier diode, the model of the second integrated circuit U2 is SM901, the second integrated circuit U2 has three pins, namely a VC pin, a GND pin and an OUT pin, an anode of the second capacitor C2 is connected to one end of the third resistor R3, a connection end of the second capacitor C2 is an anode of the linear stroboscopic removing circuit, an OUT pin of the second integrated circuit U2 is an output end of the linear stroboscopic removing circuit, the VC pin of the second integrated circuit U2 is connected to one end of the third capacitor C3, the other end of the third capacitor C3, the GND pin of the second integrated circuit U2, a cathode of the second capacitor C2 is connected to an anode of the first diode D1, and a cathode of the first diode D1 is a cathode of the linear stroboscopic removing circuit.
Claims (4)
1. A linear LED lamp circuit used by low-frequency flash wide voltage comprises a rectifying and filtering circuit, a double-section linear constant current circuit, a first LED light-emitting circuit and a second LED light-emitting circuit, wherein the rectifying and filtering circuit is provided with a first input end, a second input end, a positive output end and a negative output end, when alternating current voltage is connected between the first input end and the second input end, the voltage output between the positive output end and the negative output end is direct current voltage which changes periodically along with the alternating current voltage, the maximum voltage output between the positive output end and the negative output end is alternating current voltage peak voltage, the minimum voltage is periodically fluctuating direct current voltage which is not zero, the double-section linear constant current circuit is provided with a first output end, a second output end and a negative electrode, the first LED light-emitting circuit and the second LED light-emitting circuit are both provided with a positive electrode and a negative electrode, the linear LED lamp circuit is characterized in that the linear LED lamp circuit used by low stroboscopic wide voltage also comprises a linear stroboscopic removing circuit, the linear stroboscopic removing circuit is provided with a positive pole, a negative pole and an output end, when a pulsating current or a constant current is connected between the positive pole and the negative pole, the current output by the output end is a constant current, and the constant current and the average current connected between the positive pole and the negative pole are equal in magnitude, the positive electrode of the linear stroboscopic removing circuit is connected with the first output end of the double-section linear constant current circuit, the negative electrode of the linear stroboscopic removing circuit is connected with the second output end of the double-section linear constant current circuit, and the output end of the linear stroboscopic removing circuit is connected with the negative electrode of the second LED light-emitting circuit.
2. The linear LED lamp circuit according to claim 1, wherein the rectifying and filtering circuit comprises a full-bridge rectifier bridge stack, a first resistor and a first capacitor, the first capacitor is an electrolytic capacitor, the full-bridge rectifier bridge stack has two AC inputs, a positive voltage output and a negative voltage output, the two AC inputs of the full-bridge rectifier bridge stack are the first input and the second input of the rectifying and filtering circuit, the positive voltage output of the full-bridge rectifier bridge stack, one end of the first resistor and the positive electrode of the first capacitor are connected and the connecting end thereof is the positive output of the rectifying and filtering circuit, the negative voltage output of the full-bridge rectifier bridge stack, the other end of the first resistor and the negative electrode of the first capacitor are connected and the connecting end thereof is the negative output of the rectifying and filtering circuit.
3. The linear LED lamp circuit used for the low-flash wide voltage as claimed in claim 1, wherein the dual-stage linear constant current circuit comprises a first integrated circuit and a second resistor, the reference model of the first integrated circuit is SM2086, the 8 th pin of the first integrated circuit is the first output end of the dual-stage linear constant current circuit, the 5 th pin of the first integrated circuit is the second output end of the dual-stage linear constant current circuit, the 1 st pin of the first integrated circuit is connected with one end of the second resistor, the other end of the second resistor is connected with the 4 th pin of the first integrated circuit, and the connection end of the second resistor is the negative electrode of the dual-stage linear constant current circuit.
4. The linear LED lamp circuit of claim 1, wherein the linear stroboscopic removing circuit comprises a second integrated circuit, a third resistor, a second capacitor, a third capacitor and a first diode, the second capacitor is an electrolytic capacitor, the first diode is a rectifier diode, the second integrated circuit has a model number SM901, the second integrated circuit has three pins, namely a VC pin, a GND pin and an OUT pin, the positive electrode of the second capacitor is connected to one end of the third resistor, and the connection end of the second capacitor is the positive electrode of the linear stroboscopic removing circuit, the OUT pin of the second integrated circuit is the output end of the linear stroboscopic removing circuit, the VC pin of the second integrated circuit is connected to one end of the third capacitor, the other end of the third capacitor, the pin of the second integrated circuit, the negative electrode of the second capacitor is connected to the positive electrode of the first diode, and the negative electrode of the first diode is the negative electrode of the linear stroboscopic removing circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221120766.XU CN217985471U (en) | 2022-05-11 | 2022-05-11 | Linear LED lamp circuit used by low-frequency flash wide voltage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221120766.XU CN217985471U (en) | 2022-05-11 | 2022-05-11 | Linear LED lamp circuit used by low-frequency flash wide voltage |
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| CN217985471U true CN217985471U (en) | 2022-12-06 |
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| CN202221120766.XU Active CN217985471U (en) | 2022-05-11 | 2022-05-11 | Linear LED lamp circuit used by low-frequency flash wide voltage |
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| CN (1) | CN217985471U (en) |
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