CN212519502U - Remote controller control circuit, circuit board and remote controller - Google Patents
Remote controller control circuit, circuit board and remote controller Download PDFInfo
- Publication number
- CN212519502U CN212519502U CN202021637406.8U CN202021637406U CN212519502U CN 212519502 U CN212519502 U CN 212519502U CN 202021637406 U CN202021637406 U CN 202021637406U CN 212519502 U CN212519502 U CN 212519502U
- Authority
- CN
- China
- Prior art keywords
- control circuit
- circuit
- remote controller
- pwm signal
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a remote controller control circuit, circuit board and remote controller, remote controller control circuit includes MCU control circuit, boost circuit, the emitting diode and the emitting diode drive circuit in a poor light, and the emitting diode drive circuit includes first switch tube; the PWM control end of the MCU control circuit outputs a PWM signal, on one hand, the MCU control circuit is used for controlling the booster circuit to realize boosting, on the other hand, the MCU control circuit is also used for controlling the on-off of the light-emitting diode drive circuit, the MCU control circuit simultaneously realizes the control of the booster circuit and the light-emitting diode drive circuit by using one port, and the hardware resource is saved; the PWM signal is a high-frequency signal, the backlight light-emitting diode is on and off at high frequency, and the backlight light-emitting diode is normally on in human eyes due to the stagnation effect of human vision; when the first switch tube is cut off, the energy consumption of current flowing through the backlight light-emitting diode is reduced, and compared with a normally-on control mode, the remote controller control circuit has lower energy consumption.
Description
Technical Field
The utility model relates to the technical field of circuits, in particular to remote controller control circuit, circuit board and remote controller.
Background
Some remote controllers on the market are provided with backlight light, and some remote controllers are not provided with backlight light. For a remote controller without backlight light, the remote controller is inconvenient to use or even cannot be used under the condition of dark light; for the remote controller with backlight light, because the battery voltage is low, the backlight light can not be directly driven, generally a special boost control chip is needed to be arranged to boost the battery voltage of the remote controller and then drive the backlight light. The special boost control chip is adopted, the cost is high, the circuit is complex, in addition, the control module needs to be provided with a port to control the boost control chip and also needs to be provided with a port to control the on-off of the backlight, so that more control ports are occupied, and the loss of the remote controller is also improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a remote controller control circuit, circuit board and remote controller, simplified control circuit's structure, reduce the loss when practicing thrift hardware resources.
In a first aspect, an embodiment of the present invention provides a remote controller control circuit, including:
the MCU control circuit comprises a PWM control end for outputting a PWM signal;
the input end of the booster circuit is connected with a direct-current power supply, and the control end of the booster circuit is connected with the PWM control end to receive the PWM signal;
the anode of the backlight light-emitting diode is connected with the output end of the booster circuit;
the light emitting diode driving circuit comprises a first switch tube, wherein the cathode of the backlight light emitting diode is connected with one switch pin of the first switch tube, the other switch pin of the first switch tube is grounded, and the control pin of the first switch tube is connected to the PWM control end, so that the first switch tube is switched on when the PWM signal is in a high level state and is switched off when the PWM signal is in a low level state.
According to the utility model discloses remote controller control circuit who provides has following beneficial effect at least: the PWM signal output by the PWM control end of the MCU control circuit is used for controlling the booster circuit to realize boosting on one hand and controlling the on-off of the light-emitting diode drive circuit on the other hand, and the MCU control circuit simultaneously realizes the control of the booster circuit and the light-emitting diode drive circuit by using one port, thereby saving hardware resources; when the PWM signal is at a high level, the first switch tube is switched on, the direct-current power supply, the booster circuit, the backlight light-emitting diode and the first switch tube form a power-on loop, the backlight light-emitting diode is lightened, and when the PWM signal is at a low level, the first switch tube is switched off, and the backlight light-emitting diode is not lightened; the PWM signal is a high-frequency signal, the backlight light-emitting diode is on and off at a high frequency, and the backlight light-emitting diode is normally on in human eyes due to the stagnation effect of human vision; in addition, when the first switching tube is cut off, the energy consumption of current flowing through the backlight light-emitting diode is reduced, and compared with a normally-on control mode, the remote controller control circuit has lower energy consumption.
According to the utility model discloses a some embodiments, boost circuit is including the second switch tube that is used for controlling charge-discharge switching, a switch pin of second switch tube is connected emitting diode's in a poor light positive pole, another switch pin ground connection of second switch tube, the control pin of second switch tube is connected to the PWM control end is in order to receive the PWM signal. The second switch tube and the first switch tube are simultaneously and directly controlled by the PWM signal, the second switch tube is conducted when the PWM signal is in a high level state, and is cut off when the PWM signal is in a low level state, and the second switch tube is switched at a high frequency under the control of the PWM signal, so that the booster circuit is switched between a charging state and a discharging state, and boosting is realized.
According to some embodiments of the utility model, boost circuit still includes first inductance, diode and first electric capacity, the one end of first inductance is regarded as DC power supply is connected to boost circuit's input, the other end of first inductance is connected to respectively the positive pole of diode with a switch pin of second switch tube, the negative pole of diode is connected the one end of first electric capacity is regarded as boost circuit's output, the other end of first electric capacity with another switch pin of second switch tube all grounds.
In this embodiment, when the PWM signal is at a high level, the second switching tube is turned on to form an inductor charging loop including the dc power supply, the first inductor, and the second switching tube, and the first inductor stores energy; when the PWM signal is at a low level, the second switching tube is switched off, a capacitor charging loop of the direct-current power supply, the first inductor, the diode and the first capacitor is formed, the first inductor discharges energy, and the first capacitor serves as a filter capacitor and stores energy.
According to some embodiments of the present invention, the light emitting diode driving circuit further comprises a first resistor and a second resistor, the first resistor is connected in series between the negative electrode of the backlight light emitting diode and a switch pin of the first switch tube, and the second resistor is connected in series between the PWM control terminal and the control pin of the first switch tube. When the first switch tube is conducted, the first resistor is connected with the backlight light-emitting diode in series, so that the current passing through the backlight light-emitting diode is limited, the backlight light-emitting diode is protected, and the damage caused by overlarge current is prevented; the second resistor is used as a current-limiting resistor of the control pin of the first switch tube to protect the first switch tube and avoid burning out.
According to some embodiments of the present invention, the boost circuit further comprises a third resistor, the third resistor is connected in series between the PWM control terminal and the control pin of the second switch tube. The third resistor is used as a current-limiting resistor of a control pin of the second switch tube to protect the second switch tube and avoid burning out.
According to some embodiments of the present invention, the boost circuit further comprises a second capacitor, one end of the first capacitor is connected to one end of the first inductor, and the other end of the second capacitor is grounded. The second capacitor is arranged at the front end of the first inductor and used as a filter capacitor.
According to some embodiments of the invention, the diode is a freewheeling diode. When the second switch tube is switched, the two ends of the first inductor generate sudden voltage, other elements can be damaged, and the freewheeling diode is configured, so that the current can change more smoothly, and the occurrence of surge voltage is avoided.
According to some embodiments of the present invention, the second switch tube is an NPN type triode or an N type metal oxide semiconductor field effect transistor.
According to some embodiments of the present invention, the first switch tube is an NPN type triode or an N type metal oxide semiconductor field effect transistor.
According to some embodiments of the utility model, MCU control circuit includes the direct current voltage input, direct current power supply is connected to the direct current voltage input.
According to the utility model discloses a some embodiments, MCU control circuit is including the PWM signal generation module that is used for producing the PWM signal and the duty cycle regulation module that is used for adjusting the PWM signal duty cycle, the input of duty cycle regulation module is connected the direct current voltage input is in order to acquire direct current supply voltage, the output of duty cycle regulation module is connected the PWM signal generation module is with output duty cycle regulation signal, the output of PWM signal generation module is connected the PWM control end.
In this embodiment, the duty ratio adjusting module obtains the dc power voltage through the dc voltage input terminal, generates the duty ratio adjusting signal according to the dc power voltage and the required output voltage, and transmits the duty ratio adjusting signal to the PWM signal generating module, and the PWM signal generating module generates the PWM signal with the required duty ratio according to the duty ratio adjusting signal, so that the boost circuit outputs the required voltage.
In a second aspect, the embodiment of the present invention further provides a circuit board, including the embodiment of the first aspect of the present invention provides a remote controller control circuit.
According to the utility model discloses the circuit board that provides has following beneficial effect at least: the PWM signal output by the PWM control end of the MCU control circuit is used for controlling the booster circuit to realize boosting on one hand and controlling the on-off of the light-emitting diode drive circuit on the other hand, and the MCU control circuit simultaneously realizes the control of the booster circuit and the light-emitting diode drive circuit by using one port, thereby saving hardware resources; when the PWM signal is at a high level, the first switch tube is switched on, the direct-current power supply, the booster circuit, the backlight light-emitting diode and the first switch tube form a power-on loop, the backlight light-emitting diode is lightened, and when the PWM signal is at a low level, the first switch tube is switched off, and the backlight light-emitting diode is not lightened; the PWM signal is a high-frequency signal, the backlight light-emitting diode is on and off at a high frequency, and the backlight light-emitting diode is normally on in human eyes due to the stagnation effect of human vision; in addition, when the first switch tube is cut off, the energy consumption of current flowing through the backlight light-emitting diode is reduced, and compared with a normally-on control mode, the remote controller control circuit of the circuit board has lower energy consumption.
The embodiment of the utility model provides a third aspect still provides a remote controller, include the utility model discloses the first aspect embodiment remote controller control circuit perhaps include the utility model discloses the second aspect embodiment the circuit board.
According to the utility model discloses the remote controller that provides has following beneficial effect at least: the PWM signal output by the PWM control end of the MCU control circuit is used for controlling the booster circuit to realize boosting on one hand and controlling the on-off of the light-emitting diode drive circuit on the other hand, and the MCU control circuit simultaneously realizes the control of the booster circuit and the light-emitting diode drive circuit by using one port, thereby saving hardware resources; when the PWM signal is at a high level, the first switch tube is switched on, the direct-current power supply, the booster circuit, the backlight light-emitting diode and the first switch tube form a power-on loop, the backlight light-emitting diode is lightened, and when the PWM signal is at a low level, the first switch tube is switched off, and the backlight light-emitting diode is not lightened; the PWM signal is a high-frequency signal, the backlight light-emitting diode is on and off at a high frequency, and the backlight light-emitting diode is normally on in human eyes due to the stagnation effect of human vision; in addition, when the first switching tube is cut off, the energy consumption of current flowing through the backlight light-emitting diode is reduced, and compared with a normally-on control mode, the remote controller control circuit of the remote controller has lower energy consumption.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples;
fig. 1 is a schematic circuit diagram of a remote controller control circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a remote controller control circuit according to an embodiment of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
An embodiment of the utility model provides a remote controller control circuit, circuit board and remote controller has simplified control circuit's structure, reduces the loss when practicing thrift hardware resources.
The embodiments of the present invention will be further explained with reference to the drawings.
Referring to fig. 1, an embodiment of a first aspect of the present invention provides a remote controller control circuit, including:
the MCU control circuit 100 includes a PWM control terminal 110 for outputting a PWM signal;
the input end of the booster circuit 200 is connected with a direct current power supply VDD, and the control end of the booster circuit 200 is connected with the PWM control end 110 to receive a PWM signal;
the backlight light-emitting diode 300, the positive pole of the backlight light-emitting diode 300 is connected with the output end of the booster circuit 200;
the led driving circuit 400 includes a first switch Q1, a negative terminal of the backlight led 300 is connected to one switch pin of the first switch Q1, another switch pin of the first switch Q1 is grounded, and a control pin of the first switch Q1 is connected to the PWM control terminal 110, so that the first switch Q1 is turned on when the PWM signal is at a high level state and turned off when the PWM signal is at a low level state.
The first switching transistor Q1 may be an NPN transistor or an N-type mosfet, and in this embodiment, the NPN transistor is taken as an example.
In this embodiment, the PWM signal output by the PWM control terminal 110 of the MCU control circuit 100 is used to control the boost circuit 200 to boost voltage, and also used to control the on/off of the led driving circuit 400, and the MCU control circuit 100 uses one port to control the boost circuit 200 and the led driving circuit 400 at the same time, so as to save hardware resources; when the PWM signal is at a high level, the first switching tube Q1 is turned on, the dc power supply VDD, the boost circuit 200, the backlight led 300 and the first switching tube Q1 form a power-on loop, the backlight led 300 is turned on, and when the PWM signal is at a low level, the first switching tube Q1 is turned off, and the backlight led 300 is not turned on; the PWM signal is a high frequency signal, and the backlight led 300 is on or off at a high frequency, and the backlight led 300 is normally on in human eyes due to the stagnation effect of human vision; in addition, when the first switching tube Q1 is turned off, the power consumption of the current flowing through the backlight light emitting diode 300 is reduced, and compared with the normally-on control mode, the remote controller control circuit has lower power consumption.
Referring to fig. 2, in an embodiment, the boost circuit 200 includes a second switch Q2 for controlling charging and discharging switching, one switch pin of the second switch Q2 is connected to the anode of the backlight led 300, the other switch pin of the second switch Q2 is connected to ground, and the control pin of the second switch Q2 is connected to the PWM control terminal 110 to receive the PWM signal. The second switch tube Q2 and the first switch tube Q1 are directly controlled by the PWM signal, the second switch tube Q2 is turned on when the PWM signal is at a high level state, and is turned off when the PWM signal is at a low level state, and the second switch tube Q2 is switched at a high frequency under the control of the PWM signal, so that the voltage boost circuit 200 is switched between a charging state and a discharging state, thereby realizing the voltage boost.
Referring to fig. 2, in an embodiment, the voltage boost circuit 200 further includes a first inductor L1, a diode D1, and a first capacitor C1, one end of the first inductor L1 is used as an input terminal of the voltage boost circuit 200 to connect to the dc power VDD, the other end of the first inductor L1 is respectively connected to the anode of the diode D1 and one switch pin of the second switch tube Q2, the cathode of the diode D1 is connected to one end of the first capacitor C1 and is used as an output terminal of the voltage boost circuit 200, and the other end of the first capacitor C1 and the other switch pin of the second switch tube Q2 are both grounded.
The second switching transistor Q2 may be an NPN transistor or an N-type mosfet, and in this embodiment, the NPN transistor is taken as an example.
In this embodiment, when the PWM signal is at a high level, the second switch Q2 is turned on, an inductor charging loop including the dc power supply VDD, the first inductor L1, and the second switch Q2 is formed, and the first inductor L1 stores energy; when the PWM signal is at a low level, the second switch Q2 is turned off, so as to form a capacitor charging loop including the dc power supply VDD, the first inductor L1, the diode D1, and the first capacitor C1, where the first inductor L1 discharges energy, and the first capacitor C1 serves as a filter capacitor, and also stores energy.
Specifically, according to the volt-second principle, when the second switching tube Q2 is turned on, the energy stored in the first inductor L1 is Vdd _ Ton, where Vdd is the voltage of the dc power supply Vdd, and Ton is the on-time of the second switching tube Q2; when the second switch Q2 is turned off, the energy released by the first inductor L1 is Vdd-Vout Toff, where Vout is the output voltage of the voltage boost circuit 200 and Toff is the off-time of the second switch Q2.
According to the volt-second balance principle of the inductor, the energy stored in the first inductor L1 is equal to the released energy, and then:
Vdd*Ton＝Vdd-Vout*Toff；
ton ═ T × Duty, Toff ═ T × 1-Duty, where T is the signal period of the PWM signal and Duty is the Duty cycle, so that there is:
Vdd*T*Duty＝Vdd-Vout*T*1-Duty；
after simplification, the following is obtained:
Vout＝Vdd/1-Duty；
therefore, the MCU control circuit 100 can control the output voltage Vout of the voltage boosting circuit 200 by controlling the Duty ratio Duty of the PWM signal.
Referring to fig. 2, in an embodiment, the led driving circuit 400 further includes a first resistor R1 and a second resistor R2, the first resistor R1 is connected in series between the negative electrode of the backlight led 300 and one of the switch pins of the first switch Q1, and the second resistor R2 is connected in series between the PWM control terminal 110 and the control pin of the first switch Q1. When the first switch tube Q1 is turned on, the first resistor R1 is connected in series with the backlight led 300, so as to limit the current passing through the backlight led 300, protect the backlight led 300, and prevent the current from being damaged due to the excessive current; the second resistor R2 is used as a current limiting resistor of the control pin of the first switch Q1, protecting the first switch Q1 from being burned out.
Referring to fig. 2, in an embodiment, the boost circuit 200 further includes a third resistor R3, and the third resistor R3 is connected in series between the PWM control terminal 110 and the control pin of the second switching transistor Q2. The third resistor R3 is used as a current limiting resistor of the control pin of the second switch Q2, and protects the second switch Q2 from being burned out.
Referring to fig. 2, in an embodiment, the voltage boost circuit 200 further includes a second capacitor C2, one end of the first capacitor C1 is connected to one end of the first inductor L1, and the other end of the second capacitor C2 is grounded. The second capacitor C2 is disposed at the front end of the first inductor L1 and serves as a filter capacitor.
Specifically, in one embodiment, diode D1 is a freewheeling diode. When the second switch Q2 is switched, the first inductor L1 generates abrupt voltage at its two ends, which may damage other components.
Referring to fig. 2, in an embodiment, the MCU control circuit 100 includes a dc voltage input terminal connected to a dc power supply VDD. Further, the MCU control circuit 100 includes a PWM signal generating module for generating a PWM signal and a duty ratio adjusting module for adjusting a duty ratio of the PWM signal, an input terminal of the duty ratio adjusting module is connected to the dc voltage input terminal to obtain a voltage of the dc power VDD, an output terminal of the duty ratio adjusting module is connected to the PWM signal generating module to output a duty ratio adjusting signal, and an output terminal of the PWM signal generating module is connected to the PWM control terminal 110.
In this embodiment, the duty ratio adjusting module obtains the voltage of the dc power supply VDD through the dc voltage input terminal, generates the duty ratio adjusting signal according to the voltage of the dc power supply VDD and the required output voltage, and transmits the duty ratio adjusting signal to the PWM signal generating module, and the PWM signal generating module generates the PWM signal with the required duty ratio according to the duty ratio adjusting signal, so that the voltage boosting circuit 200 outputs the required voltage.
The embodiment of the second aspect of the utility model provides a circuit board is still provided, include the utility model discloses the remote controller control circuit of the embodiment of the first aspect. In the embodiment of the present invention, in the circuit board provided by the embodiment of the present invention, the PWM signal output by the PWM control end 110 of the MCU control circuit 100 is used to control the boost circuit 200 to boost voltage, and also used to control the on/off of the led driving circuit 400, and the MCU control circuit 100 uses a port to simultaneously control the boost circuit 200 and the led driving circuit 400, thereby saving hardware resources; when the PWM signal is at a high level, the first switching tube Q1 is turned on, the dc power supply VDD, the boost circuit 200, the backlight led 300 and the first switching tube Q1 form a power-on loop, the backlight led 300 is turned on, and when the PWM signal is at a low level, the first switching tube Q1 is turned off, and the backlight led 300 is not turned on; the PWM signal is a high frequency signal, and the backlight led 300 is on or off at a high frequency, and the backlight led 300 is normally on in human eyes due to the stagnation effect of human vision; in addition, when the first switching tube Q1 is turned off, the power consumption of the current flowing through the backlight light emitting diode 300 is reduced, and compared with a normally-on control mode, the remote controller control circuit of the circuit board has lower power consumption.
The utility model discloses a third aspect embodiment still provides a remote controller, include the utility model discloses the remote controller control circuit of first aspect embodiment perhaps includes the utility model discloses the circuit board of second aspect embodiment. In the embodiment of the present invention, the PWM signal output by the PWM control terminal 110 of the MCU control circuit 100 is used to control the boost circuit 200 to boost voltage, and also used to control the on/off of the led driving circuit 400, and the MCU control circuit 100 uses a port to control the boost circuit 200 and the led driving circuit 400, so as to save hardware resources; when the PWM signal is at a high level, the first switch Q1 is turned on, the dc power supply VDD, the voltage boost circuit 200, the backlight led 300 and the first switch Q1 form a power-on loop, the backlight led 300 is turned on, and when the PWM signal is at a low level, the first switch Q1 is turned off, and the backlight led 300 is not turned on; the PWM signal is a high frequency signal, and the backlight led 300 is on or off at a high frequency, and the backlight led 300 is normally on in human eyes due to the stagnation effect of human vision; in addition, when the first switching tube Q1 is turned off, the power consumption of the current flowing through the backlight light emitting diode 300 is reduced, and compared with the normally-on control mode, the remote controller control circuit of the remote controller has lower power consumption.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (12)
1. A remote control circuit, comprising:
the MCU control circuit comprises a PWM control end for outputting a PWM signal;
the input end of the booster circuit is connected with a direct-current power supply, and the control end of the booster circuit is connected with the PWM control end to receive the PWM signal;
the anode of the backlight light-emitting diode is connected with the output end of the booster circuit;
the light emitting diode driving circuit comprises a first switch tube, wherein the cathode of the backlight light emitting diode is connected with one switch pin of the first switch tube, the other switch pin of the first switch tube is grounded, and the control pin of the first switch tube is connected to the PWM control end, so that the first switch tube is switched on when the PWM signal is in a high level state and is switched off when the PWM signal is in a low level state.
2. The remote controller control circuit according to claim 1, wherein the boost circuit includes a second switching tube for controlling charging and discharging switching, one switching pin of the second switching tube is connected to the anode of the backlight led, another switching pin of the second switching tube is connected to ground, and the control pin of the second switching tube is connected to the PWM control terminal to receive the PWM signal.
3. The remote controller control circuit according to claim 2, wherein the voltage boost circuit further comprises a first inductor, a diode and a first capacitor, one end of the first inductor is used as an input end of the voltage boost circuit to connect to a dc power supply, the other end of the first inductor is connected to an anode of the diode and one switch pin of the second switch tube, respectively, a cathode of the diode is connected to one end of the first capacitor and is used as an output end of the voltage boost circuit, and the other end of the first capacitor and the other switch pin of the second switch tube are both grounded.
4. The remote controller control circuit of claim 2, wherein the led driving circuit further comprises a first resistor and a second resistor, the first resistor is connected in series between the negative electrode of the backlight led and one of the switch pins of the first switch tube, and the second resistor is connected in series between the PWM control terminal and the control pin of the first switch tube.
5. The remote controller control circuit of claim 3, wherein the boost circuit further comprises a third resistor connected in series between the PWM control terminal and the control pin of the second switching tube.
6. The remote controller control circuit of claim 3, wherein the boost circuit further comprises a second capacitor, one end of the first capacitor is connected to one end of the first inductor, and the other end of the second capacitor is grounded.
7. The remote controller control circuit according to claim 2, wherein the second switch transistor is an NPN-type transistor or an N-type metal oxide semiconductor field effect transistor.
8. The remote controller control circuit according to claim 1, wherein the first switch transistor is an NPN-type transistor or an N-type metal oxide semiconductor field effect transistor.
9. The remote controller control circuit of claim 1, wherein the MCU control circuit comprises a dc voltage input connected to a dc power supply.
10. The remote controller control circuit according to claim 9, wherein the MCU control circuit comprises a PWM signal generating module for generating a PWM signal and a duty ratio adjusting module for adjusting a duty ratio of the PWM signal, an input terminal of the duty ratio adjusting module is connected to the dc voltage input terminal to obtain a dc power voltage, an output terminal of the duty ratio adjusting module is connected to the PWM signal generating module to output a duty ratio adjusting signal, and an output terminal of the PWM signal generating module is connected to the PWM control terminal.
11. A circuit board comprising the remote control circuit of any one of claims 1-10.
12. A remote control comprising a remote control circuit according to any one of claims 1 to 10 or comprising a circuit board according to claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021637406.8U CN212519502U (en) | 2020-08-07 | 2020-08-07 | Remote controller control circuit, circuit board and remote controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021637406.8U CN212519502U (en) | 2020-08-07 | 2020-08-07 | Remote controller control circuit, circuit board and remote controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212519502U true CN212519502U (en) | 2021-02-09 |
Family
ID=74384341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021637406.8U Active CN212519502U (en) | 2020-08-07 | 2020-08-07 | Remote controller control circuit, circuit board and remote controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212519502U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113391540A (en) * | 2021-07-05 | 2021-09-14 | 云一峰 | Glow tube watch with Bluetooth communication global positioning function |
| CN113436586A (en) * | 2021-08-04 | 2021-09-24 | 上海商米科技集团股份有限公司 | PWM voltage control circuit and method |
| CN116954114A (en) * | 2023-06-25 | 2023-10-27 | 江苏宿芯半导体有限公司 | MCU controller with LCD drive |
-
2020
- 2020-08-07 CN CN202021637406.8U patent/CN212519502U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113391540A (en) * | 2021-07-05 | 2021-09-14 | 云一峰 | Glow tube watch with Bluetooth communication global positioning function |
| CN113436586A (en) * | 2021-08-04 | 2021-09-24 | 上海商米科技集团股份有限公司 | PWM voltage control circuit and method |
| CN113436586B (en) * | 2021-08-04 | 2023-04-25 | 上海商米科技集团股份有限公司 | PWM voltage control circuit and method |
| CN116954114A (en) * | 2023-06-25 | 2023-10-27 | 江苏宿芯半导体有限公司 | MCU controller with LCD drive |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212519502U (en) | Remote controller control circuit, circuit board and remote controller | |
| CN107069927B (en) | Power supply unit and lighting system | |
| CN214544872U (en) | LED drive protection circuit and device | |
| CN208739450U (en) | Emergency LED drive system | |
| CN107750076B (en) | LED driving circuit | |
| CN211352536U (en) | Constant current load circuit, backlight adjusting circuit, driving board card and electronic equipment | |
| CN217608014U (en) | Discharge control circuit and lamp | |
| CN217957368U (en) | Multi-path constant-current common-anode dimming power supply | |
| CN107249235B (en) | LED drive circuit compatible with indicator light switch | |
| US8975828B2 (en) | DC boost topology circuit for backlight driving | |
| CN215379094U (en) | Display power supply and display device | |
| CN213846540U (en) | Auxiliary power supply circuit, driver and wind power generation system | |
| CN212967037U (en) | Backlight driving circuit, chip power supply circuit thereof, driving board card and display device | |
| CN114222391A (en) | LED constant current driving circuit capable of adjusting color temperature and brightness | |
| CN211321573U (en) | Low-voltage LED lamp strip voltage stabilizing circuit | |
| CN208224754U (en) | ASIC integrated circuit, the control circuit of electronic cigarette and electronic cigarette | |
| CN207251284U (en) | Power supply unit and lighting system | |
| CN209299564U (en) | A kind of driving unit and a kind of LED street lamp | |
| CN214413089U (en) | Circuit for restraining overshoot of LED power output | |
| CN218301202U (en) | Power supply circuit with low standby power consumption | |
| CN216820156U (en) | Dimming control circuit and system | |
| CN221597714U (en) | Feedback control circuit of flyback power supply and flyback power supply control device | |
| CN212572112U (en) | Battery protection circuit and battery device | |
| CN218829128U (en) | Power supply circuit capable of automatically switching | |
| CN216252536U (en) | Voltage stabilization controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |