CN219068417U - LED standby low-power-consumption circuit - Google Patents
LED standby low-power-consumption circuit Download PDFInfo
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- CN219068417U CN219068417U CN202223075059.6U CN202223075059U CN219068417U CN 219068417 U CN219068417 U CN 219068417U CN 202223075059 U CN202223075059 U CN 202223075059U CN 219068417 U CN219068417 U CN 219068417U
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Abstract
The application provides an LED standby low-power-consumption circuit which comprises a voltage output module, a switch control module and an LED load module, wherein the voltage output module and the switch control module are connected with the LED load module through a wiring terminal; the switch control module comprises a turn-off signal interface and a field effect transistor Q2, wherein the turn-off signal interface is used for being connected with the processor and receiving a turn-off signal sent by the processor, the grid electrode of the field effect transistor Q2 is connected with the turn-off signal interface, the source electrode of the field effect transistor Q is grounded through a resistor R1, and the drain electrode of the field effect transistor Q is connected with the wiring terminal; the LED load module comprises an LED and a decoding chip, wherein the anode of the LED is connected with the wiring terminal, the cathode of the LED is connected with a CS pin, a GATE pin and a VCC pin of the decoding chip, the CMP pin of the decoding chip is connected with a GND pin and is connected to the wiring terminal, and the FB pin of the decoding chip is connected with the anode of the LED. The Christmas lamp string can meet the requirements of energy conservation and environmental protection.
Description
Technical Field
The application relates to the technical field of LEDs applied to direct current carriers, in particular to an LED standby low-power-consumption circuit.
Background
At present, most of high-end Christmas lamps adopt LEDs with RGB chips, so that the effect of fantasy and colorful can be achieved, and the effect cannot be achieved by adopting the traditional lamp beads. However, at present, the Christmas light string needs to synchronously use several LEDs to thousands of LEDs, and needs to use a direct current carrier technology, and then only positive and negative leads are needed, and other leads are not introduced to realize the function requirement.
The dc carrier requires a decoding chip inside each LED package. However, the standby power consumption in the OFF state is very large, and the power consumption of each decoding chip in standby operation reaches 5W, so that the power consumption is too large and the energy-saving requirement of the product is not met.
Disclosure of Invention
The purpose of the application is to provide a low-power consumption and energy-saving LED standby low-power consumption circuit which can be applied to the current Christmas lamp string and solves the problem of power consumption of the Christmas lamp string caused by using a large number of LEDs.
In order to achieve the above object, the present application provides the following technical solutions:
the LED standby low-power-consumption circuit comprises a voltage output module, a switch control module and an LED load module, wherein the voltage output module and the switch control module are connected with the LED load module through a wiring terminal;
the switch control module comprises a turn-off signal interface and a field effect transistor Q2, wherein the turn-off signal interface is used for being connected with the processor and receiving a turn-off signal sent by the processor, the grid electrode of the field effect transistor Q2 is connected with the turn-off signal interface, the source electrode of the field effect transistor Q2 is grounded through a resistor R1, and the drain electrode of the field effect transistor Q is connected with a wiring terminal;
the LED load module comprises an LED and a decoding chip, wherein the anode of the LED is connected with the wiring terminal, the cathode of the LED is connected with a CS pin, a GATE pin and a VCC pin of the decoding chip, the CMP pin of the decoding chip is connected with a GND pin and is connected to the wiring terminal, and the FB pin of the decoding chip is connected with the anode of the LED.
Further set up: a resistor R2 is connected in series between the turn-off signal interface of the switch control module and the grid electrode of the field effect transistor Q2, and a resistor R3 is connected in parallel between the grid electrode and the source electrode of the field effect transistor Q2.
Further set up: the voltage output module comprises a zener diode ZD1, wherein the positive electrode of the zener diode ZD1 is connected with the basic voltage input end, and the negative electrode of the zener diode ZD1 is connected with the wiring terminal.
Further set up: the LED display device comprises a voltage output module, a wiring terminal, a carrier superposition module, a processor and a display device, wherein the voltage output module is connected with the wiring terminal, the carrier superposition module is connected between the voltage output module and the wiring terminal, the carrier superposition module comprises a field effect tube Q3 and a field effect tube Q4, the drain electrode of the field effect tube Q3 is connected between the cathode of the voltage stabilizing diode ZD1 and the wiring terminal, the source electrode of the field effect tube Q3 is connected with a carrier voltage input end, the grid electrode of the field effect tube Q4 is connected with the drain electrode of the field effect tube Q4, the source electrode of the field effect tube Q4 is grounded, and the grid electrode of the field effect tube Q3 is connected with a carrier signal interface which is used for being connected with the processor to receive LED carrier signals.
Further set up: the field effect transistor Q3 is a P-channel enhanced field effect transistor, and a resistor R5 is connected in parallel between the source electrode and the grid electrode of the field effect transistor Q3.
Further set up: the field effect transistor Q4 is an N-channel depletion type field effect transistor, and a resistor R7 is connected in parallel between the source electrode and the grid electrode of the field effect transistor Q4.
Further set up: a resistor R4 is connected in parallel between the cathode of the zener diode ZD1 and the drain of the field effect transistor Q2.
Further set up: the LED is an RGB type LED, the LED comprises three light emitting diodes, the anodes of the three light emitting diodes are connected in parallel and connected with a wiring terminal, the cathodes of the three light emitting diodes are respectively connected to a CS pin, a GATE pin and a VCC pin of the decoding chip, a CMP pin of the decoding chip is connected with a GND pin and connected to the wiring terminal to form a loop, and a FB pin of the decoding chip is connected with the anode of the LED.
Further set up: the LED load module comprises a plurality of groups of LEDs and decoding chips thereof which are connected in series, and in the LEDs and decoding chips of two adjacent groups, the CMP pins and the GND pins of the decoding chips are connected with the anodes of the LEDs of the next group, and the CMP pins and the GND pins of one group at the tail end are connected to the wiring terminals.
Compared with the prior art, the scheme of this application has following advantage:
1. according to the LED standby low-power-consumption circuit, the switch control module is arranged, so that a loop cannot be formed between the base voltage and the load, the fixed power consumption of the decoding chip of the LED is reduced, the problem of high power consumption of the LED in standby is solved, whether overload or short circuit exists is judged by sampling the voltage change of the drain electrode of the field-effect tube Q2 of the switch control module in real time, and the field-effect tube Q2 is turned off in time to realize short circuit or overload protection, so that an LED system can be energy-saving and reliable.
2. In the LED standby low-power-consumption circuit, the LED load module adopts an RGB type LED, and different luminous effects can be realized through carrier voltages overlapped by base voltages.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a voltage output module, a switch control module, and a carrier superposition module in an embodiment of the LED standby low-power circuit of the present application;
fig. 2 is a schematic structural diagram of an LED load module in an embodiment of the LED standby low-power circuit of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of illustrating the present application and are not to be construed as limiting the present application.
Referring to fig. 1 and 2, the application discloses a low-power consumption standby circuit for an LED, which solves the problem of high standby power consumption of the LED using an RGB chip at present, and can sample load current in real time to realize short circuit or overload protection, protect load better, and reduce load damage. The LED standby low-power-consumption circuit comprises a voltage output module 100, a switch control module 200 and an LED load module 300, wherein the voltage output module 100 and the switch control module 200 are connected with the LED load module 300 through a connecting terminal J1.
Specifically, the voltage output module 100 includes a zener diode ZD1, where an anode of the zener diode ZD1 is connected to the base voltage input terminal 101, and a cathode of the zener diode ZD1 is connected to the connection terminal J1.
The switch control module 200 includes a turn-off signal interface 201 and a field effect transistor Q2, where the turn-off signal interface 201 is used to connect with a processor and receive a turn-off signal sent by the processor, a gate of the field effect transistor Q2 is connected with the turn-off signal interface 201, a source thereof is grounded through a resistor R1, and a drain thereof is connected with a connection terminal J1. In addition, the field effect tube Q2 of the application adopts an N-channel depletion type field effect tube, a resistor R2 is arranged between a grid electrode of the field effect tube Q2 and the turn-off signal interface, a resistor R3 is further connected between the grid electrode and a source electrode of the field effect tube Q2, the field effect tube Q2 is grounded after the source electrode of the field effect tube Q2 is connected with the resistor R1 in series, direct-current bias voltage can be applied to the grid electrode of the field effect tube Q2, normal operation of the field effect tube Q2 is ensured, and the resistor R2 connected in parallel between the grid electrode and the source electrode of the field effect tube Q2 selects a resistor with a large resistance value and can serve as a bleeder resistor to achieve the effect of protecting the grid electrode and the source electrode of the field effect tube Q2. Meanwhile, a resistor R2 with a small resistance value is selected between the grid electrode of the field effect tube Q2 and the turn-off signal interface 201 to be connected in series, so that the steepness of the front edge and the rear edge of the grid electrode input control pulse of the field effect tube Q2 can be changed, oscillation formed by parasitic capacitance and inductance can be prevented, the peak of output voltage is reduced, and the field effect tube Q2 is prevented from being burnt out.
Preferably, the base voltage of the embodiment is 12V, the off signal interface 201 receives an off signal with a voltage of 12V sent by the processor, the resistance value of the resistor R1 is preferably 2 Ω, the resistance value of the resistor R2 is preferably 10 Ω, and the tissue of the resistor R3 is preferably 10kΩ.
A resistor R4 is further connected in parallel between the negative electrode of the zener diode ZD1 and the drain electrode of the field effect transistor Q2, and the resistance value of the resistor R4 in this embodiment is preferably 10kΩ.
In addition, the carrier superposition module 110 is connected between the voltage output module 100 and the connection terminal J1, the carrier superposition module 110 includes a field effect transistor Q3 and a field effect transistor Q4, a drain electrode of the field effect transistor Q3 is connected between a cathode of a zener diode ZD1 of the voltage output module 100 and the connection terminal J1, a source electrode thereof is connected with the carrier voltage input end 111, a gate electrode thereof is connected with a drain electrode of the field effect transistor Q4, a source electrode of the field effect transistor Q4 is grounded, and a gate electrode thereof is connected with the carrier signal interface 112 for being connected with a processor to receive the LED carrier signal. A resistor R5 is connected in parallel between the gate and the source of the field effect transistor Q3, a resistor R6 is connected in series between the gate of the field effect transistor Q3 and the drain of the field effect transistor Q4, a resistor R7 is connected in parallel between the gate and the source of the field effect transistor Q4, and the gate thereof is connected with the carrier signal interface 112 through a resistor R8.
Preferably, the field-effect transistor Q3 in this embodiment is a P-channel enhancement-mode field-effect transistor, the field-effect transistor Q4 is an N-channel depletion-mode field-effect transistor, the resistance of the resistor R5 is preferably 220R, the resistance of the resistor R6 is preferably 1.5kΩ, the resistance of the resistor R7 is preferably 10kΩ, the resistance of the resistor R8 is preferably 10 Ω, and the carrier voltage superimposed in this application is 24V.
When the carrier voltage interface 112 inputs a high-level signal, the drain electrode and the source electrode of the field effect transistor Q4 are turned on, and at this time, the level of the drain electrode of the field effect transistor Q4 is pulled down, that is, the gate electrode of the field effect transistor Q3 inputs a low level, so that the source electrode and the drain electrode of the field effect transistor Q3 are turned on, and the carrier voltage output by the carrier superposition module 110 can be superposed on the base voltage, thereby realizing the communication requirement according to pulse width coding.
Therefore, when the LED of the present application needs to be standby, the low-level signal may be input to the off signal interface 201 of the switch control module 200 through the processor, so that the field effect transistor Q2 is turned off, and the drain electrode of the field effect transistor Q2 has no signal output, so that the base voltage 12V and the carrier voltage 24V cannot form a loop with the load through the connection terminal, and power consumption cannot be generated, thereby achieving the purpose of reducing the power consumption of the LED standby.
In addition, the voltage at the drain electrode of the field effect tube Q2 can be sampled to analyze whether overload or short circuit exists in the load, the detection condition can be fed back to the processor, and the short circuit or overload protection of the load can be realized by turning off the field effect tube Q2 in time.
The LED load module 300 of the present application includes an LED301 and a decoding chip 302, where the LED301 of the present application is an RGB LED, and includes three light emitting diodes, where the anodes of the three light emitting diodes are connected in parallel and connected to a connection terminal J1, and the cathodes thereof are respectively connected to different pins of the decoding chip 302. The decoding chip 302 of the LED301 in this embodiment is a six-pin chip, which includes a CS pin, a GATE pin, a VCC pin, a CMP pin, a GND pin, and an FB pin, where the CS pin is a primary current sampling input pin, the GATE pin is a chip driving pin, the VCC pin is a chip power supply input pin, and the CMP pin is a loop compensation pin; the GND pin is the chip reference ground, which is connected to ground, and the FB pin is the voltage feedback input pin. The cathodes of the three light emitting diodes of the LED301 of the present application are respectively connected to the CS pin, GATE pin and VCC pin of the decoding chip 302, meanwhile, the CMP pin is connected to the GND pin and to the junction terminal J1 to form a loop, and the FB pin is connected to the anode of the LED 301.
Further, in the present application, a plurality of groups of LEDs 301 and decoding chips 302 may be connected in series, and in the adjacent two groups of LEDs 301 and decoding chips 302, the CMP pin and the GND pin of the decoding chip 302 are connected to the positive electrode of the LED301 of the next group, and the CMP pin and the GND pin of the end group are connected to the junction terminal J1, so as to form a loop of the plurality of groups of LEDs 301.
Because this application adopts RGB formula LED, this application can realize different luminous effect through basic voltage superimposed carrier voltage.
In summary, the LED standby low-power-consumption circuit of the application enables a loop to be formed between a basic voltage and a load through the arrangement of the switch control module 200, and then reduces the power consumption of the fixed decoding chip of the LED, so that the problem of high power consumption of the LED in standby is solved, whether overload or short circuit exists is judged by sampling the voltage change of the drain electrode of the field effect tube Q2 of the switch control module in real time, and the field effect tube Q2 is turned off in time to realize short circuit or overload protection, so that an LED system can be energy-saving and reliable.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for a person skilled in the art, several improvements and modifications can be made without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (9)
1. The LED standby low-power-consumption circuit is characterized by comprising a voltage output module, a switch control module and an LED load module, wherein the voltage output module and the switch control module are connected with the LED load module through a wiring terminal;
the switch control module comprises a turn-off signal interface and a field effect transistor Q2, wherein the turn-off signal interface is used for being connected with the processor and receiving a turn-off signal sent by the processor, the grid electrode of the field effect transistor Q2 is connected with the turn-off signal interface, the source electrode of the field effect transistor Q2 is grounded through a resistor R1, and the drain electrode of the field effect transistor Q is connected with a wiring terminal;
the LED load module comprises an LED and a decoding chip, wherein the anode of the LED is connected with the wiring terminal, the cathode of the LED is connected with a CS pin, a GATE pin and a VCC pin of the decoding chip, the CMP pin of the decoding chip is connected with a GND pin and is connected to the wiring terminal, and the FB pin of the decoding chip is connected with the anode of the LED.
2. The LED standby low power consumption circuit of claim 1, wherein a resistor R2 is connected in series between the off signal interface of the switch control module and the gate of the field effect transistor Q2, and a resistor R3 is connected in parallel between the gate and the source of the field effect transistor Q2.
3. The LED standby low power circuit of claim 1, wherein: the voltage output module comprises a zener diode ZD1, wherein the positive electrode of the zener diode ZD1 is connected with the basic voltage input end, and the negative electrode of the zener diode ZD1 is connected with the wiring terminal.
4. The LED standby low power circuit of claim 3, wherein: the LED display device comprises a voltage output module, a wiring terminal, a carrier superposition module, a processor and a display device, wherein the voltage output module is connected with the wiring terminal, the carrier superposition module is connected between the voltage output module and the wiring terminal, the carrier superposition module comprises a field effect tube Q3 and a field effect tube Q4, the drain electrode of the field effect tube Q3 is connected between the cathode of the voltage stabilizing diode ZD1 and the wiring terminal, the source electrode of the field effect tube Q3 is connected with a carrier voltage input end, the grid electrode of the field effect tube Q4 is connected with the drain electrode of the field effect tube Q4, the source electrode of the field effect tube Q4 is grounded, and the grid electrode of the field effect tube Q3 is connected with a carrier signal interface which is used for being connected with the processor to receive LED carrier signals.
5. The LED standby low power consumption circuit of claim 4, wherein the fet Q3 is a P-channel enhancement fet, and a resistor R5 is connected in parallel between the source and the gate of the fet Q3.
6. The LED standby low power consumption circuit of claim 4, wherein the fet Q4 is an N-channel depletion fet, and a resistor R7 is connected in parallel between the source and the gate of the fet Q4.
7. The LED standby low power consumption circuit according to claim 4, wherein a resistor R4 is connected in parallel between the cathode of the zener diode ZD1 and the drain of the field effect transistor Q2.
8. The LED standby low power consumption circuit according to claim 1, wherein the LED is an RGB LED, the anodes of the three LEDs are connected in parallel and connected to a connection terminal, the cathodes of the three LEDs are respectively connected to a CS pin, a GATE pin and a VCC pin of the decoding chip, the CMP pin of the decoding chip is connected to the GND pin and connected to the connection terminal to form a loop, and the FB pin is connected to the anode of the LED.
9. The LED standby low power consumption circuit of claim 8, wherein the LED load module comprises a plurality of groups of LEDs connected in series and decoding chips thereof, and among the adjacent two groups of LEDs and decoding chips, the CMP pin and GND pin of the decoding chip are connected with the anode of the LED of the next group, and the CMP pin and GND pin of the end group are connected to the connection terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223075059.6U CN219068417U (en) | 2022-11-17 | 2022-11-17 | LED standby low-power-consumption circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223075059.6U CN219068417U (en) | 2022-11-17 | 2022-11-17 | LED standby low-power-consumption circuit |
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| Publication Number | Publication Date |
|---|---|
| CN219068417U true CN219068417U (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223075059.6U Active CN219068417U (en) | 2022-11-17 | 2022-11-17 | LED standby low-power-consumption circuit |
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| Country | Link |
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| CN (1) | CN219068417U (en) |
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