CN211090068U - Hybrid dimming driving circuit - Google Patents

Abstract

The utility model discloses a hybrid dimming drive circuit, which comprises a thyristor dimmer, a thyristor dimming and constant current circuit composed of a first rectifier circuit, a discharge circuit and a constant current circuit which are connected in sequence. A wireless control circuit composed of a second rectifier circuit, a constant voltage power supply circuit, and a wireless control module connected in sequence, a detection circuit, and a constant current circuit use an analog dimming control method to dim the LED load, and the wireless control module adjusts the LED load through a constant current circuit. The load performs wireless remote dimming, and the detection circuit detects the phase or output voltage change of the thyristor dimmer. When the detection circuit outputs a phase change signal or a voltage change signal to the wireless control module, the wireless control module controls the LED load through the constant current circuit. The brightness of the wireless control module is reset to the non-dimming or non-dimming color control state of the wireless control module; the advantage is that the wireless communication device first dims the LED light through the wireless control module, and can still use the thyristor dimmer to control the entire LED light. Adjustment in the brightness area.

Description

A hybrid dimming drive circuit

technical field

The utility model relates to a drive circuit of an LED lighting product, in particular to a hybrid dimming drive circuit.

Background technique

In the past, thyristor dimmers were usually used for dimming in most households in the United States, and the thyristor was turned on and dimmed by manually adjusting the voltage phase angle of the thyristor dimmer. In recent years, with the rapid development of wireless communication technology and Internet technology, wireless communication technology and Internet technology have been gradually applied to LED lighting products, and LED lighting products can be wirelessly switched and dimmed. Due to the addition of wireless communication technology, LED lights can be dimmed using either thyristors or wireless communication devices. The two can be adjusted individually or with each other. When the two are adjusted with each other, if it is a wireless communication device, the LED light will be dimmed first through the wireless control module, and then continue to be adjusted through the thyristor dimmer. light, then the thyristor dimmer can only adjust the remaining part of the light, but cannot adjust the entire brightness area.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a hybrid dimming drive circuit, which enables the LED lights to be dimmed through the thyristor dimmer even if the wireless communication device first dims the LED lights through the wireless control module. Adjust within the brightness area.

The technical solution adopted by the utility model to solve the above technical problems is as follows: a hybrid dimming drive circuit, comprising a silicon controlled dimmer, a silicon controlled light dimming constant current circuit and a wireless control circuit, the silicon controlled dimming The optical constant current circuit is composed of a first rectifier circuit, a discharge circuit and a constant current circuit which are connected in sequence. The wireless control circuit is composed of a second rectifier circuit, a constant voltage power supply circuit and a wireless control module which are connected in sequence. The latter one of the thyristor dimmer is connected to the input end of the first rectifier circuit, the other way is connected to the input end of the second rectifier circuit, and the output end of the constant current circuit is connected to the LED The load is connected, and the output end of the wireless control module is connected to the dimming end of the constant current circuit to perform wireless remote dimming on the LED load. It is characterized in that: the constant current circuit adopts an analog dimming control method. For dimming the LED load, the hybrid dimming drive circuit also includes a detection circuit for detecting the phase change of the thyristor dimmer or the output voltage change of the thyristor. When the detection circuit outputs a phase change signal or a voltage change signal to the wireless control module, the wireless control module controls the brightness of the LED load through the constant current circuit to reset to the wireless control module that is not dimmed. or un-dimming toning control state.

The input end of the detection circuit is connected to the output end of the second rectifier circuit, and the output end of the detection circuit is connected to the input end of the wireless control module.

The detection circuit is composed of a sixth resistor, a seventh resistor, a third capacitor and a Zener diode. One end of the sixth resistor is connected to an output end of the second rectifier circuit. The other end of the resistor is respectively connected with one end of the seventh resistor, one end of the third capacitor, the negative electrode of the Zener diode and the input end of the wireless control module, the seventh resistor The other end of the capacitor is respectively connected to the other end of the third capacitor and the anode of the Zener diode, and its common connection end is connected to the other output end of the second rectifier circuit.

The input end of the detection circuit is connected to the input end of the second rectifier circuit, and the output end of the detection circuit is connected to the input end of the wireless control module.

The detection circuit is composed of a sixth resistor, a seventh resistor, a third capacitor and a Zener diode. One end of the sixth resistor is connected to an input end of the second rectifier circuit. The other end of the resistor is respectively connected with one end of the seventh resistor, one end of the third capacitor, the negative electrode of the Zener diode and the input end of the wireless control module, the seventh resistor The other end of the capacitor is respectively connected to the other end of the third capacitor and the anode of the Zener diode, and its common connection end is connected to the other input end of the second rectifier circuit.

A signal isolation conversion circuit is added between the output end of the wireless control module and the dimming end of the constant current circuit, so that the wireless control module and the constant current circuit before signal isolation share the same ground, After signal isolation, the wireless control module and the constant current circuit are also grounded together. Since there is no common ground between the wireless control module and the constant current circuit, a signal isolation conversion circuit is introduced so that the two share the same ground before and after signal isolation.

The signal isolation conversion circuit is an optocoupler circuit.

The discharge circuit includes a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, and a control chip with a model of JW1695. One end of the first resistor is connected to the first rectifier circuit. One output end of the first resistor is connected to one end of the first resistor, the other end of the first resistor is respectively connected to one end of the second resistor and one end of the first capacitor, and its common connection end is connected to the third end of the control chip. pin connection, the other end of the second resistor is connected to the other end of the first capacitor, and its common connection end is connected to the other output end of the first rectifier circuit. The first pin is connected to an output end of the first rectifier circuit through the third resistor, and the second pin of the control chip is connected to another output end of the first rectifier circuit through the second capacitor. One output end is connected, the fourth pin of the control chip is connected to the constant current circuit, and the fifth pin to the eighth pin of the control chip are all connected to the other output end of the first rectifier circuit connect. When the commercial power is rectified by the first rectifier circuit and then input to the control chip through the first resistor, if there is a thyristor dimmer for dimming, the voltage change rate output to the control chip is relatively large, which makes the control chip conduct electricity. If there is no thyristor dimmer for dimming, the control chip will not work; the use of bleed (Bleed) circuit can improve the adjustment of no thyristor. Power efficiency when optoelectronics.

The constant current circuit includes a constant current control chip whose model is BP5788DJ, the model of the wireless control module is TYWE3L, and the constant voltage power supply circuit includes a constant voltage chip whose model is BP8519C.

The input end of the detection circuit is connected with the output end of the first rectifier circuit, and the output end of the detection circuit is connected with the input end of the wireless control module; or the input end of the detection circuit It is connected with the input end of the first rectifier circuit, and the output end of the detection circuit is connected with the input end of the wireless control module.

Compared with the prior art, the advantages of the present utility model are:

1) When the thyristor dimmer is dimmed, the detection circuit detects that the phase of the thyristor dimmer changes or the output voltage changes, and inputs the phase change signal or voltage change signal to the wireless control module for wireless control. The module resets the brightness of the LED load to the non-dimming or non-dimming color control state of the wireless control module. At this time, the thyristor dimmer can dim the LED load in the entire brightness area, even if the wireless communication device First, the LED load is dimmed through the wireless control module, and the LED load can still be adjusted in the entire brightness area through the thyristor dimmer.

2) The hybrid dimming drive circuit can directly use the thyristor dimmer to adjust the entire brightness area of the LED load; after first using a wireless communication device (such as APP) to adjust the brightness of the LED load, it will not affect the brightness of the LED load. The thyristor dimmer adjusts the entire brightness area of the LED load; after the thyristor dimmer is used to dim the LED load, only the remaining dimming brightness can be adjusted using the wireless communication device.

3) In the hybrid dimming drive circuit, the constant current circuit uses the analog dimming control method to dim the LED load instead of the PWM chopping dimming method, because the PWM chopping dimming method is used in the dimming process. The light will flicker.

4) Since the thyristor dimmer needs to provide a maintenance current during the dimming process, a bleeder circuit is used to provide a maintenance circuit for the thyristor dimmer.

5) By setting the first rectifier circuit to make the mains supply power to the constant current circuit, and by setting the second rectifier circuit to make the mains supply power to the wireless control module, so that the two do not interfere with each other, adjust to the low end in the thyristor dimmer At the same time, the wireless control module can still be powered through the second rectifier circuit.

Description of drawings

FIG. 1 is a block diagram of a hybrid dimming drive circuit according to Embodiment 1;

FIG. 2 is a specific circuit diagram of the hybrid dimming drive circuit of the first embodiment;

3 is a block diagram of a hybrid dimming drive circuit according to Embodiment 2;

FIG. 4 is a specific circuit diagram of the hybrid dimming driving circuit according to the second embodiment.

Detailed ways

The present utility model will be further described in detail below with reference to the embodiments of the accompanying drawings.

Example 1:

A hybrid dimming drive circuit proposed in this embodiment, as shown in FIG. 1 and FIG. 2 , includes a thyristor dimmer 1 , a thyristor dimming constant current circuit 2 , a wireless control circuit 3 , and a detection circuit 4 The thyristor dimming constant current circuit 2 consists of a first rectifier circuit BD1, a bleeder circuit 21, and a constant current circuit 22 connected in sequence, and the wireless control circuit 3 consists of a second rectifier circuit BD2, a constant voltage circuit connected in sequence. The power supply circuit 31 and the wireless control module M1 are composed. The mains is connected to the input end of the first rectifier circuit BD1 through the thyristor dimmer 1, and the other way is connected to the input end of the second rectifier circuit BD2. The first rectifier circuit The output end of BD1 is connected with the input end of the bleeder circuit 21, the output end of the bleeder circuit 21 is connected with the input end of the constant current circuit 22, the output end of the constant current circuit 22 is connected with the LED load 9, and the constant current circuit 22 adopts the analog The dimming control method is used to dim the LED load 9. The output end of the second rectifier circuit BD2 is connected to the input end of the constant voltage power supply circuit 31, and the output end of the constant voltage power supply circuit 31 is connected to the power supply end of the wireless control module M1. The output end of the control module M1 is connected with the dimming end of the constant current circuit 22 to perform wireless remote dimming on the LED load 9, the input end of the detection circuit 4 is connected with the output end of the second rectifier circuit BD2, and the output end of the detection circuit 4 is connected Connected to the input end of the wireless control module M1, the detection circuit 4 is used to detect the phase change of the thyristor dimmer 1 or the output voltage change of the thyristor 1. When the detection circuit 4 outputs a phase change signal or a voltage change When the signal is sent to the wireless control module M1, the wireless control module M1 controls the brightness of the LED load 9 through the constant current circuit 22 to reset to the non-dimming or non-dimming toning control state of the wireless control module M1.

In this embodiment, a signal isolation conversion circuit 5 is added between the output end of the wireless control module M1 and the dimming end of the constant current circuit 22, so that the wireless control module M1 and the constant current circuit 22 share the same ground and signal before signal isolation. After isolation, the wireless control module M1 and the constant current circuit 22 are also grounded together. Since there is no common ground between the wireless control module M1 and the constant current circuit 22 , a signal isolation conversion circuit 5 is introduced so that the two share the same ground before and after signal isolation; the signal isolation conversion circuit 5 selects an optocoupler circuit.

In this embodiment, the detection circuit 4 is composed of a sixth resistor R6, a seventh resistor R7, a third capacitor C3 and a Zener diode ZD1. One end of the sixth resistor R6 is connected to an output end of the second rectifier circuit BD2. The other end of the six resistors R6 is respectively connected to one end of the seventh resistor R7, one end of the third capacitor C3, the negative electrode of the Zener diode ZD1 and the input end of the wireless control module M1, and the other end of the seventh resistor R7 is respectively connected to the third capacitor. The other end of C3 is connected to the positive electrode of the Zener diode ZD1, and its common connection end is connected to the other output end of the second rectifier circuit BD2.

In this embodiment, the bleeder circuit 21 includes a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2, a control chip U1 with a model of JW1695, and one end of the first resistor R1 It is connected to one output end of the first rectifier circuit BD1, the other end of the first resistor R1 is connected to one end of the second resistor R2 and one end of the first capacitor C1 respectively, and its common connection end is connected to the third pin of the control chip U1 , the other end of the second resistor R2 is connected to the other end of the first capacitor C1, and its common connection end is connected to the other output end of the first rectifier circuit BD1, and the first pin of the control chip U1 is connected to the One output end of a rectifier circuit BD1 is connected, the second pin of the control chip U1 is connected to the other output end of the first rectifier circuit BD1 through the second capacitor C2, and the fourth pin of the control chip U1 is connected to the constant current circuit 22, and the control Pins 5 to 8 of the chip U1 are all connected to the other output end of the first rectifier circuit BD1. When the commercial power is rectified by the first rectifier circuit BD1 and then input to the control chip U1 through the first resistor R1, if there is a thyristor dimmer 1 for dimming, the rate of change of the voltage output to the control chip U1 is relatively large. , make the control chip U1 turn on and work, and provide the maintenance current to the thyristor dimmer 1; if there is no thyristor 1 dimming, the control chip U1 is disconnected and does not work; the use of the bleeder circuit 21 can Improve the power efficiency when the thyristor dimmer 1 is not connected.

In this embodiment, both the first rectifier circuit BD1 and the second rectifier circuit BD2 use conventional rectifier stacks, that is, they are composed of four diodes; the constant current circuit 22 includes a constant current control chip U2 with a model of BP5778DJ, a fourth resistor R4 , the fifth resistor R5, the first diode D1, the first electrolytic capacitor CE1, the second electrolytic capacitor CE2, the first pin of the constant current control chip U2 is connected to an output end of the signal isolation conversion circuit 5, the constant current control chip The second pin of U2 is grounded through the fourth resistor R4, the third pin of the constant current control chip U2 is connected to the other output terminal of the signal isolation conversion circuit 5, the fourth pin of the constant current control chip U2 is grounded through the fifth resistor R5, The 5th pin of the constant current control chip U2 is respectively connected with the negative electrode of one LED lamp bead LED-2 in the LED load 9 and the negative electrode of the second electrolytic capacitor CE2, and the 6th pin of the constant current control chip U2 is respectively connected with the LED load 9. The negative pole of the other LED lamp bead LED-1 is connected to the negative pole of the first electrolytic capacitor CE1, the 7th pin of the constant current control chip U2 is suspended, the 8th pin of the constant current control chip U2, an LED lamp bead LED-2 The anode, the anode of the second electrolytic capacitor CE2, the anode of the other LED lamp LED-1 and the anode of the first electrolytic capacitor CE1 are all connected to the cathode of the first diode D1, and the anode of the first diode D1 is connected to the anode of the first diode D1. A resistor R1 is connected to the common connection terminal of the third resistor R3, and the ninth pin of the constant current control chip U2 is grounded; the constant voltage power supply circuit 31 includes a constant voltage chip U3 with a model of BP8519C, an eighth resistor R8, a ninth resistor R9, Tenth resistor R10, fourth capacitor C4, second diode D2, third electrolytic capacitor CE3, first inductor L1, second inductor L2, third diode D3, fourth electrolytic capacitor CE4, eleventh resistor R11, the anode of the second diode D2 is connected to one output end of the second rectifier circuit BD2, the cathode of the second diode D2 is connected to one end of the first inductor L1 and one end of the eighth resistor R8 respectively, the first inductor The other end of L1 is connected to the other end of the eighth resistor R8, and its common connection end is respectively connected to the positive electrode of the third electrolytic capacitor CE3 and the first pin of the constant voltage chip U3, and the negative electrode of the third electrolytic capacitor CE3 is connected to the second rectifier. The other output terminal of the circuit BD2 is connected, the second pin of the constant voltage chip U3 is suspended, the third pin of the constant voltage chip U3 is connected to one end of the ninth resistor R9 and one end of the tenth resistor R10 respectively, and the other end of the ninth resistor R9 is connected. One end is respectively connected to one end of the second inductor L2, the positive electrode of the fourth electrolytic capacitor CE4, and one end of the eleventh resistor R11, and its common connection end is connected to the power supply end of the wireless control module M1, and the other end of the second inductor L2 is respectively It is connected to the other end of the tenth resistor R10, the negative electrode of the third diode D3, one end of the fourth capacitor C4 and the fifth pin of the constant voltage chip U3, and the other end of the fourth capacitor C4 is connected to the fourth pin of the constant voltage chip U3. The pin is connected, the anode of the third diode D3, the cathode of the fourth electrolytic capacitor CE4, the eleventh resistor R The other end of 11 is grounded; the model of the wireless control module M1 is TYWE3L, the first pin of the wireless control module M1 is the power terminal, the second pin of the wireless control module M1 is grounded, and the third pin of the wireless control module M1 is isolated from the signal. One input end of the circuit 5 is connected, the 4th pin of the wireless control module M1 is connected with the other input end of the signal isolation conversion circuit 5, the 5th and 6th pins of the wireless control module M1 are left floating, and the 7th pin of the wireless control module M1 The pin is the input terminal and is connected to the negative pole of the Zener diode ZD1 in the detection circuit 4 .

Embodiment 2:

A hybrid dimming drive circuit proposed in this embodiment, as shown in FIG. 3 and FIG. 4 , has basically the same structure as that of the first embodiment, the only difference is that the input terminal of the detection circuit 4 is the same as the input terminal of the second rectifier circuit BD2. The input terminal is connected, and the output terminal of the detection circuit 4 is connected to the input terminal of the wireless control module M1. The detection circuit 4 is composed of a sixth resistor R6, a seventh resistor R7, a third capacitor C3 and a Zener diode ZD1. One end is connected to one input end of the second rectifier circuit BD2, the other end of the sixth resistor R6 is respectively connected to one end of the seventh resistor R7, one end of the third capacitor C3, the negative electrode of the Zener diode ZD1 and the input end of the wireless control module M1 The other end of the seventh resistor R7 is respectively connected to the other end of the third capacitor C3 and the positive electrode of the Zener diode ZD1, and its common connection end is connected to the other input end of the second rectifier circuit BD2.

In the actual design, the setting position of the detection circuit 4 can also be changed, for example, the input end of the detection circuit 4 is connected with the output end of the first rectifier circuit BD1, and the output end of the detection circuit 4 is connected with the input end of the wireless control module M1; Alternatively, the input end of the detection circuit 4 is connected to the input end of the first rectifier circuit BD1, and the output end of the detection circuit 4 is connected to the input end of the wireless control module M1.

Claims (10)

1. A hybrid dimming drive circuit, comprising a thyristor dimmer, a thyristor dimming constant current circuit and a wireless control circuit, wherein the thyristor dimming constant current circuit is composed of a first rectifier circuit connected in sequence. , discharge circuit, and constant current circuit. The wireless control circuit is composed of a second rectifier circuit, a constant voltage power supply circuit, and a wireless control module connected in sequence. The input end of the first rectifier circuit is connected to the input end of the second rectifier circuit, the other way is connected to the input end of the second rectifier circuit, the output end of the constant current circuit is connected to the LED load, the output end of the wireless control module is connected It is connected with the dimming terminal of the constant current circuit to perform wireless remote dimming on the LED load. The circuit also includes a detection circuit for detecting the phase change of the thyristor dimmer or the output voltage change of the thyristor dimmer, when the detection circuit outputs a phase change signal or a voltage change signal When given to the wireless control module, the wireless control module controls the brightness of the LED load to reset to the non-dimming or non-dimming color-tone control state of the wireless control module through the constant current circuit. 2 . The hybrid dimming drive circuit according to claim 1 , wherein the input terminal of the detection circuit is connected to the output terminal of the second rectifier circuit, and the output terminal of the detection circuit is connected to the output terminal of the second rectifier circuit. 3 . Connect with the input end of the wireless control module. 3. A hybrid dimming drive circuit according to claim 2, wherein the detection circuit is composed of a sixth resistor, a seventh resistor, a third capacitor and a Zener diode, and the sixth resistor One end of the second rectifier circuit is connected to one output end of the second rectifier circuit, and the other end of the sixth resistor is respectively connected to one end of the seventh resistor, one end of the third capacitor, and the voltage regulator The cathode of the diode is connected to the input end of the wireless control module, the other end of the seventh resistor is respectively connected to the other end of the third capacitor and the anode of the Zener diode, and they are connected in common The terminal is connected to the other output terminal of the second rectifier circuit. 4 . The hybrid dimming drive circuit according to claim 1 , wherein the input end of the detection circuit is connected to the input end of the second rectifier circuit, and the output end of the detection circuit is connected to the input end of the second rectifier circuit. 5 . Connect with the input end of the wireless control module. 5 . The hybrid dimming drive circuit according to claim 4 , wherein the detection circuit is composed of a sixth resistor, a seventh resistor, a third capacitor and a Zener diode, and the sixth resistor One end of the rectifier is connected to one input end of the second rectifier circuit, and the other end of the sixth resistor is connected to one end of the seventh resistor, one end of the third capacitor, and the voltage regulator The cathode of the diode is connected to the input end of the wireless control module, the other end of the seventh resistor is respectively connected to the other end of the third capacitor and the anode of the Zener diode, and they are connected in common The terminal is connected to the other input terminal of the second rectifier circuit. 6. A hybrid dimming drive circuit according to any one of claims 1 to 5, characterized in that: an additional setting is provided between the output end of the wireless control module and the dimming end of the constant current circuit There is a signal isolation conversion circuit, so that the wireless control module and the constant current circuit before the signal isolation share the ground together, and the wireless control module and the constant current circuit also share the ground together after the signal isolation. 7 . The hybrid dimming drive circuit according to claim 6 , wherein the signal isolation conversion circuit is an optocoupler circuit. 8 . 8 . The hybrid dimming drive circuit according to claim 6 , wherein the discharge circuit comprises a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, and the model is: 9 . In the control chip of JW1695, one end of the first resistor is connected to an output end of the first rectifier circuit, and the other end of the first resistor is respectively connected to one end of the second resistor and the One end of the first capacitor is connected, and its common connection end is connected to the third pin of the control chip, and the other end of the second resistor is connected to the other end of the first capacitor, and its common connection end is connected to the other output end of the first rectifier circuit, the first pin of the control chip is connected to an output end of the first rectifier circuit through the third resistor, and the control chip The second pin is connected to the other output end of the first rectifier circuit through the second capacitor, and the fourth pin of the control chip is connected to the constant current circuit. The fifth pin to the eighth pin are all connected to the other output end of the first rectifier circuit. 9 . The hybrid dimming drive circuit according to claim 1 , wherein the constant current circuit comprises a constant current control chip whose model is BP5788DJ, and the model of the wireless control module is TYWE3L, 9 . The constant voltage power supply circuit described above includes a constant voltage chip whose model is BP8519C. 10 . The hybrid dimming drive circuit according to claim 1 , wherein the input end of the detection circuit is connected to the output end of the first rectifier circuit, and the output end of the detection circuit is connected to the output end of the first rectifier circuit. It is connected with the input end of the wireless control module; or the input end of the detection circuit is connected with the input end of the first rectifier circuit, and the output end of the detection circuit is connected with the input end of the wireless control module. input connection.

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