CN213152430U - Novel high-frequency exemption stroboscopic-free LED power circuit - Google Patents
Novel high-frequency exemption stroboscopic-free LED power circuit Download PDFInfo
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- CN213152430U CN213152430U CN202021980328.1U CN202021980328U CN213152430U CN 213152430 U CN213152430 U CN 213152430U CN 202021980328 U CN202021980328 U CN 202021980328U CN 213152430 U CN213152430 U CN 213152430U
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Abstract
The utility model discloses a novel high frequency exempt from not have stroboscopic LED power supply circuit, alternating current power supply L/N is through anti-thunder and lightning surge circuit, EMI filter circuit, rectifier circuit output direct current, the direct current is through the main elementary to secondary output of switching transformer, then through DC-DC circuit output load operating voltage, switching transformer's vice primary return circuit is connected with feedback circuit's feedback end, feedback circuit passes through the switching tube Q2 control switching transformer's the circuit break-make of main elementary, switching transformer's vice primary return circuit provides starting voltage to feedback circuit; the input end of the Bluetooth power supply circuit is connected with the secondary output end of the switch transformer, the Bluetooth power supply circuit outputs working voltage to the Bluetooth control circuit, one path of the Bluetooth control circuit outputs a brightness adjusting signal to the DC-DC circuit, and the other path of the Bluetooth control circuit outputs a color temperature adjusting signal which is respectively connected with the cold light source and the warm light source through the PWM duty ratio control circuit. The utility model discloses circuit reliability is strong, and application scope is wide.
Description
Technical Field
The utility model relates to a LED power supply circuit technical field, especially a novel high frequency exempt from no stroboscopic LED power supply circuit through colour temperature is transferred to bluetooth control light.
Background
With the wide application of artificial intelligence technology in people's daily life, intelligent lighting is used by more and more people. The LED driving power supply with intelligent control is continuously updated, along with the development of the technology, the stroboscopic index is also known and learned by people, and the non-stroboscopic illumination becomes the choice of more and more people. The LED power supply with dimming and color temperature adjustment, high frequency exemption and no stroboflash is generated due to market demand.
However, the current non-strobe circuit has simpler design and poorer stability.
Wireless control has become the indispensable mode of intelligent lamps and lanterns, if provide a reliable and stable wireless control circuit and realize adjusting luminance mixing of colors temperature and do not have stroboscopic LED power supply circuit, it is the utility model discloses need solve.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is not enough to above-mentioned prior art, a novel high frequency exemption of the colour temperature of adjusting luminance through bluetooth control does not have stroboscopic LED power supply circuit is provided.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is: a novel high-frequency exemption stroboflash-free LED power supply circuit comprises an anti-thunder surge circuit, an EMI filter circuit, a rectifying circuit, a switch transformer, a feedback circuit, a DC-DC circuit, a Bluetooth power supply circuit, a Bluetooth control circuit and a PWM duty ratio control circuit; an alternating current power supply L/N outputs direct current through a lightning surge resistant circuit, an EMI filter circuit and a rectifying circuit, the direct current is output to a secondary side through a main primary side of a switch transformer, then load working voltage is output through a DC-DC circuit, a secondary primary loop of the switch transformer is connected with a feedback end of a feedback circuit, the feedback circuit controls the on-off of the loop of the main primary side of the switch transformer through a switch tube Q2, and the secondary primary loop of the switch transformer provides starting voltage for the feedback circuit; the input end of the Bluetooth power supply circuit is connected with the secondary output end of the switch transformer, the Bluetooth power supply circuit outputs working voltage to the Bluetooth control circuit, one path of the Bluetooth control circuit outputs a brightness adjusting signal to the DC-DC circuit, and the other path of the Bluetooth control circuit outputs a color temperature adjusting signal which is respectively connected with the cold light source and the warm light source through the PWM duty ratio control circuit; the DC-DC circuit comprises a DC-DC chip U3 which adopts an average current mode for control, a GATE pin of the DC-DC chip U3 is connected with a control end of a switch tube Q8, an input end of the switch tube Q8 is connected with a load loop, and an output end of the switch tube Q8 is grounded; the main primary side of the switch transformer is connected in parallel with an RC filter circuit formed by serially connecting a resistor R16 and a capacitor C9, and the secondary side of the switch transformer is connected with two parallel Schottky diodes; a resistor R50 and a resistor R38 are connected in series between the GATE pin of the DC-DC chip U3 and the control end of the switch tube Q8, the resistor R38 is connected in parallel with a reversely connected diode D10, and a resistor R51 is connected between the control end and the output end of the switch tube Q8.
In the above technical solution, the feedback circuit includes a feedback chip U1, a GATE pin of the feedback chip U1 is connected to a control end of a switching tube Q2, an input end of the switching tube is connected to a loop of a main primary of the switching transformer, and an output end of the switching tube is grounded; the secondary primary loop of the switch transformer is connected with a feedback pin and a VDD pin of a feedback chip U1; the VCC pin is connected with a diode D4, a resistor R4 and a polar capacitor C3; the output end of the rectifying circuit is connected with the input end of a switching tube Q1, the control end of a switching tube Q1 is connected with a COMP pin of a feedback chip U1, and the output end of a switching tube Q1 is connected with a VDD pin after being connected with a diode D1 in series.
In the above technical solution, the bluetooth power supply circuit includes bluetooth power chip U2, and the input of bluetooth power chip U2 is connected with the output of switching transformer to output the operating voltage who supplies bluetooth control circuit.
In the above technical solution, the bluetooth control circuit includes a bluetooth control chip U4, and the bluetooth control chip U4 receives a remote bluetooth control signal and divides the remote bluetooth control signal into two paths to output to respectively realize brightness adjustment of the DC-DC circuit and color temperature adjustment of the cold light source and the warm light source.
In the above technical solution, the PWM duty control circuit includes a MOS transistor Q3 and a MOS transistor Q4; the input end of the MOS tube Q3 is connected with a cold light source of the load loop, and the control end is connected with the Bluetooth control circuit; the input end of the MOS tube Q4 is connected with a warm light source of the load loop, and the control end is connected with the Bluetooth control circuit.
In the above technical solution, the bluetooth control circuit is connected to the PWM duty cycle control circuit through a switching tube circuit, the switching tube circuit includes switching tubes Q6, Q7, and Q5, input ends of the switching tubes Q6, Q7, and Q5 are connected to a load circuit, a control end of the switching tube Q6 is connected to an IO pin of the bluetooth control circuit, a control end of the switching tube Q7 is connected to an input end of the switching tube Q6, and a control end of the switching tube Q5 is connected to an output end of the switching tube Q7; the input end of the switching tube Q7 is connected with the control end of the PWM duty ratio control circuit.
The utility model has the advantages that:
1. the whole circuit structure has strong reliability and wide application range.
2. High-frequency non-stroboscopic output is realized.
3. The color temperature adjustment is realized through the complementary alternate work of 2 MOS tubes.
4. The output of the control signal is realized through Bluetooth wireless control.
5. The RC filter circuit formed by serially connecting the resistor R16 and the capacitor C9 is connected in parallel with the main primary of the switching transformer, so that the filtering before the transformation is better realized.
6. Two parallel Schottky diodes are connected to the secondary end of the switching transformer, so that compared with the prior art in which only one diode is arranged, the output current can be prevented from being overlarge, and the problem that the Schottky diodes are easy to burn is effectively avoided.
7. The switching-off of the switching tube Q8 can be accelerated by connecting a resistor R50 and a resistor R38 in series between the GATE pin of the DC-DC chip U3 and the control end of the switching tube Q8, and connecting a reverse diode D10 in parallel with the resistor R38.
8. The switch-off of the switching tube Q8 is further accelerated by connecting a resistor R51 between the control end and the output end of the switching tube Q8.
Drawings
Fig. 1 is a schematic diagram of the overall circuit of the present invention.
Fig. 2 is a schematic diagram of a circuit of a portion of fig. 1.
Fig. 3 is a schematic circuit diagram of another detail of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1-3, a high-frequency exemption non-strobe LED power circuit for controlling dimming and color temperature by bluetooth comprises an anti-lightning surge circuit, an EMI filter circuit, a rectifier circuit, a switch transformer, a feedback circuit, a DC-DC circuit, a bluetooth power circuit, a bluetooth control circuit and a PWM duty ratio control circuit; an alternating current power supply L/N outputs direct current through a lightning surge resistant circuit, an EMI filter circuit and a rectifying circuit, the direct current is output to a secondary side through a main primary side of a switch transformer, then load working voltage is output through a DC-DC circuit, a secondary primary loop of the switch transformer is connected with a feedback end of a feedback circuit, the feedback circuit controls the on-off of the loop of the main primary side of the switch transformer through a switch tube Q2, and the secondary primary loop of the switch transformer provides starting voltage for the feedback circuit; the input end of the Bluetooth power supply circuit is connected with the secondary output end of the switch transformer, the Bluetooth power supply circuit outputs working voltage to the Bluetooth control circuit, one path of the Bluetooth control circuit outputs a brightness adjusting signal to the DC-DC circuit, and the other path of the Bluetooth control circuit outputs a color temperature adjusting signal which is respectively connected with the cold light source and the warm light source through the PWM duty ratio control circuit. A common-mode inductor LF3 and a polar capacitor C17 are connected in the load loop to play a role in stroboscopic removal. The DC-DC circuit comprises a DC-DC chip U3 which adopts an average current mode for control, a GATE pin of the DC-DC chip U3 is connected with a control end of a switch tube Q8, an input end of the switch tube Q8 is connected with a load loop, and an output end of the switch tube Q8 is grounded. The main primary side of the switch transformer is connected in parallel with an RC filter circuit formed by serially connecting a resistor R16 and a capacitor C9, and the secondary side of the switch transformer is connected with two parallel Schottky diodes; a resistor R50 and a resistor R38 are connected in series between the GATE pin of the DC-DC chip U3 and the control end of the switch tube Q8, the resistor R38 is connected in parallel with a reversely connected diode D10, and a resistor R51 is connected between the control end and the output end of the switch tube Q8.
Specifically, the feedback circuit comprises a feedback chip U1, a GATE pin of the feedback chip U1 is connected with a control end of a switching tube Q2, an input end of the switching tube is connected with a loop of a main primary of the switching transformer, and an output end of the switching tube is grounded; the secondary primary loop of the switch transformer is connected with a feedback pin and a VDD pin of a feedback chip U1; the VCC pin is connected with a diode D4, a resistor R4 and a polar capacitor C3; the output end of the rectifying circuit is connected with the input end of a switching tube Q1, the control end of a switching tube Q1 is connected with a COMP pin of a feedback chip U1, and the output end of a switching tube Q1 is connected with a VDD pin after being connected with a diode D1 in series.
Specifically, the bluetooth power supply circuit includes bluetooth power chip U2, and the input of bluetooth power chip U2 is connected with the output of switching transformer to output the operating voltage who supplies bluetooth control circuit.
Specifically, the bluetooth control circuit comprises a bluetooth control chip U4, and the bluetooth control chip U4 receives a remote bluetooth control signal and outputs the remote bluetooth control signal in two paths to respectively adjust the brightness of the DC-DC circuit and the color temperature of the cold light source and the warm light source.
Specifically, the PWM duty control circuit includes a MOS transistor Q3 and a MOS transistor Q4; the input end of the MOS tube Q3 is connected with a cold light source of the load loop, and the control end is connected with the Bluetooth control circuit; the input end of the MOS tube Q4 is connected with a warm light source of the load loop, and the control end is connected with the Bluetooth control circuit.
Specifically, the bluetooth control circuit is connected with the PWM duty cycle control circuit through a switching tube circuit, the switching tube circuit includes switching tubes Q6, Q7 and Q5, input ends of the switching tubes Q6, Q7 and Q5 are connected with a load circuit, a control end of the switching tube Q6 is connected with an IO pin of the bluetooth control circuit, a control end of the switching tube Q7 is connected with an input end of the switching tube Q6, and a control end of the switching tube Q5 is connected with an output end of the switching tube Q7; the input end of the switching tube Q7 is connected with the control end of the PWM duty ratio control circuit.
The utility model discloses a theory of operation:
the AC-DC part is high-voltage common-frequency alternating current and is converted into stable low-voltage direct current constant-voltage output through a high-frequency switching circuit under the condition of high conversion efficiency. The input voltage range is AC220-240V/50 Hz. And are marked with safety regulations and EMC standards.
And 2, the DC-DC part is used for converting constant voltage into light-adjustable constant current for output, the chip is controlled in an average current mode, the output current is controlled in a PWM mode, and the requirement of high-precision current output is met.
3. A color temperature adjusting circuit is formed by 2M 0S tubes, and the brightness ratio of the LED lamps in different color temperature states is controlled by controlling the conduction ratio of the first MOS tube and the second MOS tube so as to adjust the color temperature.
4. The Bluetooth control part: contain bluetooth module, module power supply and signal output module circuit, bluetooth module passes through output module circuit and LED drive power supply circuit to be connected to the LED lamp. The bluetooth module outputs 2 signals: one signal controls the output current of the DC-DC part to realize dimming (two-degree adjustment), and the other signal controls the complementary alternate work of 2M 0S tubes to realize color temperature adjustment. The PWM signal that bluetooth module output is greater than 3KHz and satisfies the stroboscopic requirement of high frequency exemption nothing.
5. After an electrolytic capacitor is added at the output end of the DC-DC constant voltage to constant current, the output current controlled by the DC-DC IC is converted into continuous current which linearly changes along with duty instead of pulse current, so that the color temperature adjusting part is not influenced by the light adjusting frequency. The color temperature can be adjusted when the low-brightness and high-frequency PWM signals are used for dimming.
The above embodiments are merely illustrative and not restrictive, and all equivalent changes and modifications made by the methods described in the claims are intended to be included within the scope of the present invention.
Claims (6)
1.A novel high-frequency exemption stroboflash-free LED power supply circuit comprises an anti-thunder surge circuit, an EMI filter circuit, a rectifying circuit, a switch transformer, a feedback circuit, a DC-DC circuit, a Bluetooth power supply circuit, a Bluetooth control circuit and a PWM duty ratio control circuit; an alternating current power supply L/N outputs direct current through a lightning surge resistant circuit, an EMI filter circuit and a rectifying circuit, the direct current is output to a secondary side through a main primary side of a switch transformer, then load working voltage is output through a DC-DC circuit, a secondary primary loop of the switch transformer is connected with a feedback end of a feedback circuit, the feedback circuit controls the on-off of the loop of the main primary side of the switch transformer through a switch tube Q2, and the secondary primary loop of the switch transformer provides starting voltage for the feedback circuit; the input end of the Bluetooth power supply circuit is connected with the secondary output end of the switch transformer, the Bluetooth power supply circuit outputs working voltage to the Bluetooth control circuit, one path of the Bluetooth control circuit outputs a brightness adjusting signal to the DC-DC circuit, and the other path of the Bluetooth control circuit outputs a color temperature adjusting signal which is respectively connected with the cold light source and the warm light source through the PWM duty ratio control circuit; the DC-DC circuit comprises a DC-DC chip U3 which adopts an average current mode for control, a GATE pin of the DC-DC chip U3 is connected with a control end of a switch tube Q8, an input end of the switch tube Q8 is connected with a load loop, and an output end of the switch tube Q8 is grounded; the method is characterized in that: the main primary side of the switch transformer is connected in parallel with an RC filter circuit formed by serially connecting a resistor R16 and a capacitor C9, and the secondary side of the switch transformer is connected with two parallel Schottky diodes; a resistor R50 and a resistor R38 are connected in series between the GATE pin of the DC-DC chip U3 and the control end of the switch tube Q8, the resistor R38 is connected in parallel with a reversely connected diode D10, and a resistor R51 is connected between the control end and the output end of the switch tube Q8.
2. The novel high-frequency exemption stroboflash-free LED power supply circuit of claim 1, characterized in that: the feedback circuit comprises a feedback chip U1, a GATE pin of the feedback chip U1 is connected with a control end of a switching tube Q2, an input end of the switching tube is connected with a loop of a main primary of the switching transformer, and an output end of the switching tube is grounded; the secondary primary loop of the switch transformer is connected with a feedback pin and a VDD pin of a feedback chip U1; the VCC pin is connected with a diode D4, a resistor R4 and a polar capacitor C3; the output end of the rectifying circuit is connected with the input end of a switching tube Q1, the control end of a switching tube Q1 is connected with a COMP pin of a feedback chip U1, and the output end of a switching tube Q1 is connected with a VDD pin after being connected with a diode D1 in series.
3. The novel high-frequency exemption stroboflash-free LED power supply circuit of claim 1, characterized in that: the Bluetooth power supply circuit comprises a Bluetooth power supply chip U2, the input end of the Bluetooth power supply chip U2 is connected with the output end of the switch transformer, and working voltage for the Bluetooth control circuit is output.
4. The novel high-frequency exemption stroboflash-free LED power supply circuit of claim 1, characterized in that: the Bluetooth control circuit comprises a Bluetooth control chip U4, and the Bluetooth control chip U4 receives a remote Bluetooth control signal and outputs the remote Bluetooth control signal in two paths to respectively adjust the brightness of the DC-DC circuit and the color temperature of the cold light source and the warm light source.
5. The novel high-frequency exemption stroboflash-free LED power supply circuit of claim 1, characterized in that: the PWM duty cycle control circuit comprises a MOS transistor Q3 and a MOS transistor Q4; the input end of the MOS tube Q3 is connected with a cold light source of the load loop, and the control end is connected with the Bluetooth control circuit; the input end of the MOS tube Q4 is connected with a warm light source of the load loop, and the control end is connected with the Bluetooth control circuit.
6. The novel high-frequency exemption stroboflash-free LED power supply circuit according to claim 5, characterized in that: the Bluetooth control circuit is connected with the PWM duty ratio control circuit through a switching tube circuit, the switching tube circuit comprises switching tubes Q6, Q7 and Q5, the input ends of the switching tubes Q6, Q7 and Q5 are connected with a load loop, the control end of the switching tube Q6 is connected with an IO pin of the Bluetooth control circuit, the control end of the switching tube Q7 is connected with the input end of the switching tube Q6, and the control end of the switching tube Q5 is connected with the output end of the switching tube Q7; the input end of the switching tube Q7 is connected with the control end of the PWM duty ratio control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021980328.1U CN213152430U (en) | 2020-09-11 | 2020-09-11 | Novel high-frequency exemption stroboscopic-free LED power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021980328.1U CN213152430U (en) | 2020-09-11 | 2020-09-11 | Novel high-frequency exemption stroboscopic-free LED power circuit |
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| Publication Number | Publication Date |
|---|---|
| CN213152430U true CN213152430U (en) | 2021-05-07 |
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| CN202021980328.1U Active CN213152430U (en) | 2020-09-11 | 2020-09-11 | Novel high-frequency exemption stroboscopic-free LED power circuit |
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| CN (1) | CN213152430U (en) |
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Address after: No. 253, Hengli Junma Road, Hengli Town, Dongguan, Guangdong 523460 Patentee after: Guangdong Qingzhou Photoelectric Technology Co.,Ltd. Address before: 523000 workshop, No.3, xiaotiantou 1st Road, Xinsi village, Hengli Town, Dongguan City, Guangdong Province Patentee before: LETARON ELECTRONIC CO.,LTD. |