Power supply circuit and remote controller

Abstract

The utility model discloses a power supply circuit and a remote controller, and the power supply circuit comprises a power supply output end which is used for accessing a load of at least one remote controller; the input end of the first power supply branch is used for being connected with the battery pack, the output end of the first power supply branch is connected with the power supply output end, and the first power supply branch is used for outputting the battery voltage through the power supply output end when the battery voltage output by the battery pack reaches the preset reference voltage; the output end of the second power supply branch is connected with the power supply output end; the first switch is connected in series between the battery pack and the second power supply branch and is used for being closed when the battery voltage is lower than the reference voltage so as to connect the battery pack with the input end of the second power supply branch; the second power supply branch circuit is also used for boosting the accessed battery voltage when the second power supply branch circuit is connected with the battery pack and outputting the boosted battery voltage through the power supply output end; the technical scheme aims to prolong the service life of the dry battery when the dry battery supplies power to the remote controller.

Description

Technical Field

[0001] The utility model relates to the technical field of remote controllers, in particular to a power supply circuit and a remote controller. Background Art

[0002] At present, conventional remote controls on the market are all powered by dry batteries. As the batteries are used, the battery voltage will gradually drop. Generally, when it drops to around 2.5V, the remote control will begin to malfunction, such as code sending errors, abnormal remote control reset, packet loss, reduced transmission distance, and other problems. As a result, the dry batteries that still have a certain amount of residual power can no longer continue to power the remote control normally, which seriously reduces the service life of the dry batteries. Utility Model Content

[0003] The main purpose of the utility model is to provide a power supply circuit and a remote controller, aiming to extend the service life of dry batteries when powering the remote controller.

[0004] To achieve the above object, the utility model provides a power supply circuit, which is applied to a remote controller and includes:

[0005] A power output terminal, used to connect to at least one load of the remote controller;

[0006] a first power supply branch, wherein the input end of the first power supply branch is used to connect to the battery pack, and the output end of the first power supply branch is connected to the power supply output end, and is used to output the battery voltage through the power supply output end when the battery voltage output by the battery pack reaches a preset reference voltage;

[0007] A second power supply branch, wherein an output end of the second power supply branch is connected to an output end of the power supply;

[0008] a first switch, connected in series between the battery pack and the second power supply branch, and configured to close when the battery voltage is lower than the reference voltage to connect the battery pack to an input terminal of the second power supply branch;

[0009] The second power supply branch is also used to boost the voltage of the connected battery when connected to the battery pack, and output the boosted battery voltage through the power output terminal.

[0010] In some embodiments, the first power supply branch includes:

[0011] An undervoltage detection circuit, wherein an input end of the undervoltage detection circuit and a detection end of the undervoltage detection circuit are respectively used to connect to the battery pack;

[0012] A switch circuit, wherein the input end of the switch circuit is used to connect to the battery pack, the controlled end of the switch circuit is connected to the output end of the undervoltage detection circuit, and the output end of the switch circuit is connected to the power supply output end;

[0013] The undervoltage detection circuit is further configured to control the switch circuit to connect the battery pack to the power output terminal when it is detected that the battery voltage reaches the reference voltage.

[0014] In some embodiments, the undervoltage detection circuit includes:

[0015] A controllable voltage regulator, wherein the input end of the controllable voltage regulator and the controlled end of the controllable voltage regulator are respectively used to connect to the battery pack, and the output end of the controllable voltage regulator is connected to the controlled end of the switch circuit, and is used to be controlled to be turned on when the battery voltage connected to the controlled end reaches the reference voltage, so as to output a stable driving voltage to the switch circuit.

[0016] In some embodiments, the switch circuit comprises:

[0017] A switch tube, wherein the input end of the switch tube is the input end of the switch circuit, and the output end of the switch tube is the output end of the switch circuit;

[0018] The first resistor is connected in series between the controlled end of the switch tube and the output end of the undervoltage detection circuit.

[0019] In some embodiments, the second power supply branch includes:

[0020] A boost chip, comprising a power pin, a switch pin, an enable pin, an output pin, a feedback pin and a ground pin, wherein the power pin and the enable pin are electrically connected to the output end of the first switch respectively, the output pin is the output end of the second power supply branch, and the ground pin is grounded;

[0021] A first inductor is connected in series between the power pin and the switch pin.

[0022] In some embodiments, the second power supply branch further includes:

[0023] A voltage feedback circuit, wherein the input end of the voltage feedback circuit is connected to the output pin, and the output end of the voltage feedback circuit is connected to the feedback pin, is used to collect the boosted battery voltage and output a voltage feedback signal of a corresponding voltage value to the boost chip to maintain the output voltage of the boost chip at a preset output voltage.

[0024] In some embodiments, the voltage feedback circuit includes:

[0025] a second resistor, wherein a first end of the second resistor is connected to the output pin, and a second end of the second resistor is connected to the feedback pin;

[0026] A third resistor, a first end of the third resistor is connected to the second end of the second resistor, and a second end of the third resistor is grounded.

[0027] In some embodiments, the power supply circuit further comprises:

[0028] The second switch is connected in series between the battery pack and the first power supply branch, and is used to jointly cut off the connection between the battery pack and the power output end when both are disconnected from the first switch, so as to stop the battery pack from supplying power to the load of the remote control.

[0029] The utility model also provides a remote controller, comprising a remote controller body, a battery and the above-mentioned power supply circuit;

[0030] The remote controller body is provided with a battery compartment, and the battery is arranged in the battery compartment;

[0031] The power supply circuit is arranged in the remote controller body and is electrically connected to the battery.

[0032] In some embodiments, the remote control body is further provided with a mounting slot, and the mounting slot is communicated with the battery compartment;

[0033] The power circuit of the remote controller includes a first switch and a second switch, and the first switch and the second switch are arranged in the installation groove at intervals.

[0034] The technical solution of the utility model is to respectively set a first power supply branch and a second power supply branch with different functions, so that the first power supply branch directly outputs the battery voltage when the battery voltage is higher than a preset reference voltage, and the second power supply branch is combined with a first switch. When the battery voltage is lower than the reference voltage, the first switch connects the second power supply branch to the battery pack, and continues to output the battery voltage output by the battery pack after boosting, so that the dry batteries that still have a certain amount of residual power continue to supply power to the remote control normally, aiming to extend the service life of the dry batteries when powering the remote control. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0036] Figure 1This is a schematic diagram of the structure of an embodiment of the power supply circuit of the utility model;

[0037] Figure 2 It is a structural schematic diagram of another embodiment of the power supply circuit of the utility model;

[0038] Figure 3 It is a structural schematic diagram of another embodiment of the power supply circuit of the utility model;

[0039] Figure 4 A circuit connection diagram of an embodiment of a power supply circuit of the utility model;

[0040] Figure 5 A circuit connection diagram of another embodiment of the power supply circuit of the utility model;

[0041] Figure 6 The figure is a schematic structural diagram of an embodiment of a remote controller of the utility model.

[0042] Description of Figure Numbers:

[0043] Label name Label name 110 Power output 200 Remote control body 120 The first power supply branch 210 Battery compartment 121 Undervoltage detection circuit 220 Mounting slot 122 Switching Circuit U1 Boost chip 130 First switch D1 Controllable voltage regulator 140 Second power supply branch Q1 Switching tube 150 Voltage feedback circuit L1 First Inductor 160 Second switch R1~R3 First resistor to third resistor

[0044] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0047] The utility model provides a power supply circuit, which is applied to a remote controller.

[0048] Reference Figure 1 In one embodiment, the power supply circuit comprises:

[0049] A power output terminal 110, used to connect to at least one load of the remote controller;

[0050] A first power supply branch 120, wherein an input end of the first power supply branch 120 is used to connect to a battery pack, and an output end of the first power supply branch 120 is connected to the power supply output end 110, and is used to output the battery voltage through the power supply output end 110 when the battery voltage output by the battery pack reaches a preset reference voltage;

[0051] A second power supply branch 140, wherein an output end of the second power supply branch 140 is connected to the power supply output end 110;

[0052] a first switch 130, connected in series between the battery pack and the second power supply branch 140, and configured to close when the battery voltage is lower than the reference voltage, so as to connect the battery pack to the input end of the second power supply branch 140;

[0053] The second power supply branch 140 is also used to boost the voltage of the connected battery when connected to the battery pack, and output the boosted battery voltage through the power output terminal 110 .

[0054] In this embodiment, the power supply circuit includes two power supply branches, wherein the first power supply branch 120 is used to output the battery voltage output by the battery pack directly to the power output terminal 110 to power various loads of the remote control when the battery pack has sufficient power, and the second power supply branch 140 is used to boost the battery voltage and power the battery voltage through the power output terminal 110 when the battery pack power drops to a level that the battery voltage cannot directly power various loads of the remote control normally.

[0055] Specifically, the first switch 130 of the power supply circuit is in the off state by default. After the remote control is assembled with batteries, if the battery voltage output by the battery pack is higher than the preset reference voltage, the first power supply branch 120 is turned on to directly electrically connect the battery pack to the power output terminal 110. It should be noted that the reference voltage is set by the R&D personnel according to the minimum voltage for the remote control to work normally. For example, when the minimum voltage required for the remote control to work normally is 2.5V, the reference voltage is set to 2.5V.

[0056] When the battery voltage output by the battery pack is lower than the reference voltage, the first power supply branch 120 will be turned off because the power supply voltage connected to the controlled end cannot reach the reference voltage to drive its operation, and the remote control will shut down due to no voltage output from the power output end 110. At this time, the user can close the first switch 130 to electrically connect the second power supply branch 140 to the battery pack, and through the boosting and stabilizing effect of the second power supply branch 140, the current lower battery voltage is boosted, so that the boosted battery voltage is stabilized at a specific voltage value higher than the reference voltage, wherein the specific voltage value is set by the R&D personnel according to the actual needs of the remote control, such as 3.3V, 3V, etc.

[0057] The technical solution of the utility model is to respectively set a first power supply branch 120 and a second power supply branch 140 with different functions, so that the first power supply branch 120 directly outputs the battery voltage when the battery voltage is higher than a preset reference voltage, and the second power supply branch 140 is combined with the first switch 130. When the battery voltage is lower than the reference voltage, the first switch 130 connects the second power supply branch 140 to the battery pack, and continues to output the battery voltage output by the battery pack after boosting, so that the dry batteries with a certain amount of residual power continue to supply power to the remote control normally, aiming to extend the service life of the dry batteries when supplying power to the remote control.

[0058] Reference Figure 2 In one embodiment, the first power supply branch 120 includes:

[0059] An undervoltage detection circuit 121, wherein an input end of the undervoltage detection circuit 121 and a detection end of the undervoltage detection circuit 121 are respectively used to connect to the battery pack;

[0060] A switch circuit 122, wherein the input end of the switch circuit 122 is used to connect to the battery pack, the controlled end of the switch circuit 122 is connected to the output end of the undervoltage detection circuit 121, and the output end of the switch circuit 122 is connected to the power output end 110;

[0061] The undervoltage detection circuit 121 is further configured to control the switch circuit 122 to connect the battery pack to the power output terminal 110 when detecting that the battery voltage reaches the reference voltage.

[0062] In this embodiment, the detection end of the undervoltage detection circuit 121 is used to collect the battery voltage in real time. When it is detected that the battery voltage is higher than a preset reference voltage, it indicates that the battery voltage is not undervoltage at this time. The undervoltage detection circuit 121 outputs a corresponding control signal to the switch circuit 122 to control the switch circuit 122 to close, directly electrically connecting the battery pack to the power output end 110, so that the battery voltage directly supplies power to various loads of the remote control.

[0063] Reference Figure 1 , Figure 2 and Figure 4 In one embodiment, the undervoltage detection circuit 121 includes:

[0064] A controllable voltage regulator D1, wherein the input end of the controllable voltage regulator D1 and the controlled end of the controllable voltage regulator D1 are respectively used to connect to the battery pack, and the output end of the controllable voltage regulator D1 is connected to the controlled end of the switch circuit 122, and is used to be controlled to be turned on when the battery voltage connected to the controlled end reaches the reference voltage, so as to output a stable driving voltage to the switch circuit 122.

[0065] In this embodiment, the controllable voltage regulator D1 can specifically be a voltage regulator chip of model TL431. The working state of the controllable voltage regulator D1 is controlled by the voltage connected to its controlled end. The effective voltage of the controlled end is selected as the controllable voltage regulator D1 with a reference voltage. The controlled end of the controllable voltage regulator D1 is connected to the battery pack and receives the battery voltage output by the battery pack in real time. When the battery voltage reaches the effective voltage of the controlled end, that is, the battery voltage is higher than the reference voltage, the controllable voltage regulator D1 is controlled to be turned on, and after the battery voltage connected to the input end is stabilized, the driving voltage with a stable output voltage value drives the switch circuit 122 to close, so as to connect the battery pack with the power output end 110. The driving voltage is set according to the voltage range that the switch circuit 122 can withstand.

[0066] Reference Figure 1 , Figure 2 and Figure 4 In one embodiment, the switch circuit 122 includes:

[0067] A switch tube Q1, wherein the input end of the switch tube Q1 is the input end of the switch circuit 122, and the output end of the switch tube Q1 is the output end of the switch circuit 122;

[0068] The first resistor R1 is connected in series between the controlled end of the switch tube Q1 and the output end of the undervoltage detection circuit 121 .

[0069] In this embodiment, the first resistor R1 is used to divide the driving voltage output by the undervoltage detection circuit 121 to protect the switch tube Q1.

[0070] The switch tube Q1 is turned on when receiving the driving voltage output by the undervoltage detection circuit 121, connecting the battery pack to the power output terminal 110. When the undervoltage detection circuit 121 stops outputting the driving voltage because the battery voltage is lower than the reference voltage, the switch tube Q1 is turned off, so that the low-battery voltage will not directly power the load, thereby preventing the remote control from malfunctioning due to low-voltage power supply.

[0071] Reference Figure 1 and Figure 4 In one embodiment, the second power supply branch 140 includes:

[0072] The boost chip U1 has a power pin, a switch pin, an enable pin, an output pin, a feedback pin and a ground pin, wherein the power pin and the enable pin are electrically connected to the output end of the first switch 130 respectively, the output pin is the output end of the second power supply branch 140, and the ground pin is grounded;

[0073] A first inductor L1 is connected in series between the power pin and the switch pin.

[0074] In this embodiment, when the battery voltage output by the battery pack is lower than the reference voltage, the first power supply branch 120 is turned off. At this time, the user closes the first switch 130 to electrically connect the second power supply branch 140 to the battery pack. At this time, the boost chip U1 and the first inductor L1 are combined into a BOOST boost circuit. The boost chip U1 is internally integrated with a switch circuit 122. By adjusting the switching frequency of the switch circuit 122 and combining the energy storage and discharge of the first inductor L1, the input battery voltage is boosted and the boosted battery voltage is stabilized at a specific voltage value higher than the reference voltage.

[0075] Reference Figure 1 and Figure 4 In one embodiment, the second power supply branch 140 further includes:

[0076] A voltage feedback circuit 150, wherein the input end of the voltage feedback circuit 150 is connected to the output pin, and the output end of the voltage feedback circuit 150 is connected to the feedback pin, is used to collect the boosted battery voltage and output a voltage feedback signal of a corresponding voltage value to the boost chip U1, so as to maintain the output voltage of the boost chip U1 at a preset output voltage.

[0077] In this embodiment, the voltage feedback circuit 150 includes:

[0078] A second resistor R2, wherein a first end of the second resistor R2 is connected to the output pin, and a second end of the second resistor R2 is connected to the feedback pin;

[0079] A third resistor R3, a first end of the third resistor R3 is connected to the second end of the second resistor R2, and a second end of the third resistor R3 is grounded.

[0080] In the present embodiment, the second resistor R2 and the third resistor R3 form a voltage divider circuit to divide the battery voltage after the boost chip U1 is boosted. Since the two resistors are connected in series, the currents flowing through the second resistor R2 and the third resistor R3 are equal, that is, the ratio of the voltage across the second resistor R2 and the third resistor R3 is equal to the ratio of the resistance values ​​of the resistors. Since the two resistors are non-adjustable resistors, the proportion of each resistor in the boosted battery voltage remains unchanged. The third resistor R3 is grounded, so the voltage at its first end can be detected to obtain its divided voltage, so that the voltage at the first end of the third resistor R3 is used as the voltage of the voltage feedback signal to reflect the voltage value of the boosted battery voltage in real time.

[0081] Reference Figure 1 , Figure 3 and Figure 5 In one embodiment, the power supply circuit further includes:

[0082] The second switch 160 is connected in series between the battery pack and the first power supply branch 120, and is used to disconnect the connection between the battery pack and the power output terminal 110 when both are disconnected from the first switch 130, so as to stop the battery pack from supplying power to the load of the remote control.

[0083] In this embodiment, when the remote control is not needed, in order to prevent the battery pack from continuing to supply power to the various loads of the remote control and causing unnecessary waste of electricity, a second switch 160 can be connected in series between the battery pack and the first power supply branch 120, so that after the user stops using the remote control, the second switch 160 and the first switch 130 are turned off to stop the battery power supply to save power, until the remote control is used again, and then the second switch 160 is turned on to supply power to the remote control.

[0084] Reference Figure 6 The utility model also provides a remote controller, which includes a remote controller body 200, a battery and a power supply circuit. The remote controller body 200 is provided with a battery compartment 210, and the battery is arranged in the battery compartment 210;

[0085] The power circuit is disposed in the remote controller body 200 and is electrically connected to the battery.

[0086] The specific structure of the power supply circuit refers to the above embodiments. Since the remote control adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0087] Reference Figure 6 In one embodiment, the remote control body 200 is further provided with a mounting slot 220, and the mounting slot 220 is communicated with the battery compartment 210;

[0088] The power circuit of the remote controller includes a first switch 130 and a second switch 160 . The first switch 130 and the second switch 160 are disposed in the mounting groove 220 at intervals.

[0089] In this embodiment, the battery compartment 210 and the display screen of the remote control are arranged on two sides of the remote control body 200 away from each other, and the first switch 130 and the second switch 160 are arranged on one side of the battery compartment, which can shorten the length of the wire in the power supply circuit. The first switch 130 and the second switch 160 can be arranged in parallel or vertically along the side of the battery compartment for user convenience.

[0090] The above description is only an optional embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A power supply circuit, characterized in that: The power supply circuit is applied to a remote controller, and the power supply circuit comprises: A power output terminal, used to connect to at least one load of the remote controller; a first power supply branch, wherein the input end of the first power supply branch is used to connect to the battery pack, and the output end of the first power supply branch is connected to the power supply output end, and is used to output the battery voltage through the power supply output end when the battery voltage output by the battery pack reaches a preset reference voltage; A second power supply branch, wherein an output end of the second power supply branch is connected to an output end of the power supply; a first switch, connected in series between the battery pack and the second power supply branch, and configured to close when the battery voltage is lower than the reference voltage to connect the battery pack to an input terminal of the second power supply branch; The second power supply branch is also used to boost the voltage of the connected battery when connected to the battery pack, and output the boosted battery voltage through the power output terminal.

2. The power supply circuit according to claim 1, characterized in that The first power supply branch comprises: An undervoltage detection circuit, wherein an input end of the undervoltage detection circuit and a detection end of the undervoltage detection circuit are respectively used to connect to the battery pack; A switch circuit, wherein the input end of the switch circuit is used to connect to the battery pack, the controlled end of the switch circuit is connected to the output end of the undervoltage detection circuit, and the output end of the switch circuit is connected to the power supply output end; The undervoltage detection circuit is further configured to control the switch circuit to connect the battery pack to the power output terminal when it is detected that the battery voltage reaches the reference voltage.

3. The power supply circuit according to claim 2, characterized in that: The undervoltage detection circuit comprises: A controllable voltage regulator, wherein the input end of the controllable voltage regulator and the controlled end of the controllable voltage regulator are respectively used to connect to the battery pack, and the output end of the controllable voltage regulator is connected to the controlled end of the switch circuit, and is used to be controlled to be turned on when the battery voltage connected to the controlled end reaches the reference voltage, so as to output a stable driving voltage to the switch circuit.

4. The power supply circuit according to claim 2, characterized in that: The switch circuit comprises: A switch tube, wherein the input end of the switch tube is the input end of the switch circuit, and the output end of the switch tube is the output end of the switch circuit; The first resistor is connected in series between the controlled end of the switch tube and the output end of the undervoltage detection circuit.

5. The power supply circuit according to claim 1, characterized in that: The second power supply branch comprises: A boost chip, comprising a power pin, a switch pin, an enable pin, an output pin, a feedback pin and a ground pin, wherein the power pin and the enable pin are electrically connected to the output end of the first switch respectively, the output pin is the output end of the second power supply branch, and the ground pin is grounded; A first inductor is connected in series between the power pin and the switch pin.

6. The power supply circuit according to claim 5, characterized in that: The second power supply branch further includes: A voltage feedback circuit, wherein the input end of the voltage feedback circuit is connected to the output pin, and the output end of the voltage feedback circuit is connected to the feedback pin, is used to collect the boosted battery voltage and output a voltage feedback signal of a corresponding voltage value to the boost chip to maintain the output voltage of the boost chip at a preset output voltage.

7. The power supply circuit according to claim 6, characterized in that: The voltage feedback circuit comprises: a second resistor, wherein a first end of the second resistor is connected to the output pin, and a second end of the second resistor is connected to the feedback pin; A third resistor, a first end of the third resistor is connected to the second end of the second resistor, and a second end of the third resistor is grounded.

8. The power supply circuit according to claim 1, wherein: The power supply circuit also includes: The second switch is connected in series between the battery pack and the first power supply branch, and is used to jointly cut off the connection between the battery pack and the power output end when both are disconnected from the first switch, so as to stop the battery pack from supplying power to the load of the remote control.

9. A remote controller, characterized in that: It comprises a remote control body, a battery and a power supply circuit as claimed in any one of claims 1 to 8; The remote controller body is provided with a battery compartment, and the battery is arranged in the battery compartment; The power supply circuit is arranged in the remote controller body and is electrically connected to the battery.

10. The remote controller according to claim 9, characterized in that: The remote control body is also provided with a mounting slot, and the mounting slot is communicated with the battery compartment; The power circuit of the remote controller includes a first switch and a second switch, and the first switch and the second switch are arranged in the installation groove at intervals.

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