Multi-mode power supply circuit and camera

Abstract

The utility model discloses a multi-mode power supply circuit and a camera, and the multi-mode power supply circuit comprises a first power end which is used for connecting an adapter power supply; a second power supply terminal; a first battery power supply circuit; a second battery power supply circuit; a power supply control circuit; the first battery power supply circuit and the second battery power supply circuit are used for jointly disconnecting the first battery and the second battery from the second power supply end when the first power supply end is connected to the adapter power supply; or, under the control of the external controller, the first battery or the second battery is connected with the second power supply end; the technical scheme of the utility model aims to meet the requirements of products in different application scenes.

Description

Technical Field

[0001] The utility model relates to the technical field of cameras, in particular to a multi-mode power supply circuit and a camera. Background Art

[0002] Traditional camera products usually use a combination of an external adapter and a single battery for power supply. Therefore, when in use, the power supply methods they have are very limited. For example, as described in CN208548751U, "When the connected external charging power supply is working normally, the external charging power supply at this time will provide a stable voltage to power the digital product, and will stop supplying power after being fully charged." This means that the camera can only choose between adapter power supply and single battery power supply. When the adapter is not carried, the single battery will be exhausted and cannot meet the power supply requirements of the camera. When the adapter is powered, the adapter power will no longer be consumed after the battery is fully charged, and the battery power will be consumed first, which cannot meet the user's long-term battery life needs. Utility Model Content

[0003] The main purpose of the utility model is to provide a multi-mode power supply circuit and a camera, aiming to meet the needs of different application scenarios of the product.

[0004] To achieve the above-mentioned purpose, the multi-mode power supply circuit proposed by the utility model includes:

[0005] A first power supply terminal, used to connect to an adapter power supply;

[0006] a second power supply terminal;

[0007] A first battery power supply circuit, whose input end is used to connect to the first battery, whose output end is connected to the second power supply end, whose first controlled end is connected to the first power supply end, and whose second controlled end is used to connect to the external controller;

[0008] A second battery power supply circuit, whose input end is used to connect to the second battery, whose output end is connected to the second power supply end, whose third controlled end is connected to the first power supply end, and whose fourth controlled end is used to connect to the external controller;

[0009] A power supply control circuit, whose input end is connected to the first power supply end and the second power supply end respectively, and whose output end is used to connect to an external controller, and the power supply control circuit is used to connect the first power supply end and the second power supply end to their output ends respectively when triggered;

[0010] The first battery power supply circuit and the second battery power supply circuit are used to jointly disconnect the first battery and the second battery from the second power supply end when the first power supply end is connected to the adapter power supply; or,

[0011] Under the control of the external controller, the first battery or the second battery is connected to the second power terminal.

[0012] In some embodiments, the first battery and the second battery are respectively used to output corresponding battery power, and the first battery power supply circuit or the second battery power supply circuit includes:

[0013] A selection control branch, wherein an input end of the selection control branch is used to connect to the corresponding first battery or second battery, and a controlled end of the selection control branch is used to connect to the external controller;

[0014] a switch control branch, wherein an input end of the switch control branch is connected to an output end of the selection control branch, a first controlled end of the selection control branch is connected to the first power supply end, a second controlled end of the selection control branch is used to access the external controller, and an output end of the switch control branch is connected to the second power supply end;

[0015] The switch control branch is used to disconnect the output end of the selection control branch from the second power end when the first power end is connected to the adapter power; or

[0016] Under the control of the external controller, the battery power source is connected to the second power source terminal together with the selection control branch.

[0017] In some embodiments, the first battery powered circuit or the second battery powered circuit further comprises:

[0018] A first unidirectional conduction circuit is connected in parallel to both ends of the switch control branch, and the first unidirectional conduction circuit is used to control the adapter power to stop inputting power to the first battery and the second battery when the first power end is connected to the adapter power; and

[0019] When the first power supply end is not connected to the adapter power supply and the selection control branch does not receive the shutdown control signal output by the external controller, the battery power connected to the selection control branch is output to the second power supply end.

[0020] In some embodiments, the switch control branch includes:

[0021] a first switch tube, wherein an input end of the first switch tube is used to connect to the first battery or the second battery, and an output end of the first switch tube is connected to the second power supply end;

[0022] A second switch tube, wherein an output end of the second switch tube is grounded;

[0023] a first resistor and a second resistor, wherein a first end of the first resistor is connected to an output end of the first switch tube, a second end of the first resistor is connected to a first end of the second resistor, and a second end of the second resistor is connected to an input end of the second switch tube;

[0024] A third resistor and a fourth resistor, wherein the first end of the third resistor is used to be electrically connected to an external controller, the second end of the third resistor is respectively connected to the first end of the fourth resistor and the controlled end of the second switch tube, and the second end of the fourth resistor is grounded.

[0025] In some embodiments, the selection control branch includes:

[0026] a third switch tube, wherein an input end of the third switch tube is used to connect to the first battery or the second battery;

[0027] A fourth switch tube, an output end of the fourth switch tube is grounded;

[0028] A fifth switch tube, an output end of the fifth switch tube is grounded;

[0029] a fifth resistor and a sixth resistor, wherein a first end of the fifth resistor is connected to the input end of the third switch tube, a second end of the fifth resistor is respectively connected to the first end of the sixth resistor and the controlled end of the fifth switch tube, and a second end of the sixth resistor is connected to the input end of the fourth switch tube;

[0030] a seventh resistor, an eighth resistor and a ninth resistor, wherein a first end of the seventh resistor is connected to the input end of the third switch tube, a second end of the seventh resistor is respectively connected to the first end of the eighth resistor, the first end of the ninth resistor and the controlled end of the fourth switch tube, a second end of the eighth resistor is connected to the input end of the fifth switch tube, and a second end of the ninth resistor is grounded;

[0031] A tenth resistor and an eleventh resistor, wherein the first end of the tenth resistor is used to be electrically connected to the external controller, the second end of the tenth resistor is respectively connected to the first end of the eleventh resistor and the controlled end of the fifth switch tube, and the second end of the eleventh resistor is grounded.

[0032] In some embodiments, the first battery and the second battery are respectively used to output corresponding battery power, and the multi-mode power supply circuit further includes:

[0033] a second unidirectional conduction circuit, comprising two unidirectional conduction branches, wherein input ends of the two unidirectional conduction branches are respectively connected to the first power supply end, and output ends of the two unidirectional conduction branches are respectively connected to the first controlled end and the third controlled end, wherein the second unidirectional conduction circuit is used to control the power output by the adapter to flow unidirectionally from the first power supply end to the first controlled end and the third controlled end when the first power supply end is connected to the adapter; and

[0034] When the first power supply end is not connected to the adapter, the battery power is controlled not to be output to the first power supply end.

[0035] In some embodiments, the power supply control circuit includes:

[0036] a third unidirectional conducting circuit, wherein an input end of the third unidirectional conducting circuit is connected to the first power supply, and an output end of the third unidirectional conducting circuit is connected to the second power supply;

[0037] a switch circuit, wherein the input end of the switch circuit is respectively connected to the output end of the third unidirectional conduction circuit and the second power supply end, and the output end of the switch circuit is used to connect to the external controller;

[0038] A trigger component connected to a controlled end of the switch circuit;

[0039] The trigger component is used to control the switch circuit to connect the output end of the third unidirectional conduction circuit and the second power supply end to the external controller respectively when being triggered;

[0040] The third unidirectional conduction circuit is used to control the power output by the adapter to flow unidirectionally from the first power supply end to the second power supply end or the external controller when the first power supply end is connected to the adapter; and

[0041] When the first power end is not connected to the adapter, the second power end is controlled not to output to the first power end.

[0042] In some embodiments, the multi-mode power supply circuit further includes:

[0043] A charging control circuit, comprising two charging control branches, wherein input ends of the two charging control branches are respectively connected to the second power supply end, output ends of the two charging control branches are respectively electrically connected to the first battery and the second battery, and controlled ends of the two charging control branches are respectively used to be electrically connected to the external controller;

[0044] The charging control circuit is used to connect / disconnect the first battery and / or the second battery to the second power supply terminal under the control of the external controller, so as to charge / stop charging the first battery and / or the second battery.

[0045] In some embodiments, the charging control branch includes:

[0046] a sixth switch tube, wherein an input end of the sixth switch tube is used to connect to the first battery or the second battery, and an output end of the sixth switch tube is connected to the first power supply end;

[0047] A seventh switch tube, an output end of the seventh switch tube is grounded;

[0048] a twelfth resistor and a thirteenth resistor, wherein a first end of the twelfth resistor is connected to the first power supply end, a second end of the twelfth resistor is respectively connected to the controlled end of the sixth switch tube and the first end of the thirteenth resistor, and a second end of the thirteenth resistor is connected to the input end of the seventh switch tube;

[0049] A fourteenth resistor and a fifteenth resistor, wherein the first end of the fourteenth resistor is used to be electrically connected to the external controller, the second end of the fourteenth resistor is respectively connected to the controlled end of the seventh switch tube and the first end of the fifteenth resistor, and the second end of the fifteenth resistor is grounded.

[0050] The utility model also provides a camera, including a controller, a first battery, a second battery and an SSD multi-mode power supply circuit;

[0051] The multi-mode power supply circuit has multiple first input terminals, second input terminals, fifth controlled terminals and sixth controlled terminals. The multiple first input terminals are respectively connected to the first battery and the second battery. The second input terminal and the fifth controlled terminal are used to connect to the adapter. The output terminal of the multi-mode power supply circuit and the sixth controlled terminal are respectively connected to the controller.

[0052] The technical solution of the utility model can realize power supply for a variety of different power supply combination scenarios by adopting the power supply control circuit to cooperate with the first battery power supply circuit and the second battery power supply circuit, such as power supply for the product by a single power adapter, power supply for the product by a single battery pack, power supply for the product by a double battery pack, power supply for the product by a power adapter and a single battery pack, power supply for the product by a power adapter and a double battery pack, etc., which can meet the needs of complex application scenarios of the product, and by connecting two batteries respectively through the first battery power supply circuit and the second battery power supply circuit, the user can easily expand the standby battery life of the product according to their own needs and reduce the number of charging times. In addition, when the external adapter loses power, the product monitoring still works, and the monitoring has no power-off blind spot. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] 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.

[0054] Figure 1 It is a structural schematic diagram of an embodiment of a multi-mode power supply circuit of the utility model;

[0055] Figure 2 It is a structural schematic diagram of an embodiment of the first battery power supply circuit or the second battery power supply circuit in the utility model;

[0056] Figure 3 It is a structural schematic diagram of another embodiment of the multi-mode power supply circuit of the utility model;

[0057] Figure 4 It is a structural schematic diagram of an embodiment of a power supply control circuit in the utility model;

[0058] Figure 5 A circuit connection diagram of an embodiment of a first battery power supply circuit or a second battery power supply circuit in the utility model;

[0059] Figure 6 It is a circuit connection diagram of an embodiment of a first battery power supply circuit and a second battery power supply circuit in the utility model;

[0060] Figure 7 It is a circuit connection diagram of an embodiment of a power supply control circuit in the utility model;

[0061] Figure 8 It is a circuit connection diagram of an embodiment of a charging control circuit in the utility model.

[0062] Description of Figure Numbers:

[0063] Label name Label name 110 First power supply terminal 300 Power supply control circuit 120 Second power supply terminal 310 Switching Circuit 210 First battery powered circuit 320 Trigger Component 220 Second battery powered circuit 330 The third unidirectional conduction circuit 221 Select the control branch 400 Charging control circuit 222 Switch control branch D1~D2 First diode to second diode 223 The first unidirectional conduction circuit Q1~Q7 The first switch tube to the seventh switch tube 224 The second unidirectional conduction circuit R1~R15 The first resistor to the fifteenth resistor

[0064] 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

[0065] 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.

[0066] 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.

[0067] The utility model provides a multi-mode power supply circuit.

[0068] Reference Figure 1 In one embodiment, the multi-mode power supply circuit includes:

[0069] A first power supply terminal 110, used to connect to an adapter power supply;

[0070] A second power supply terminal 120;

[0071] A first battery power supply circuit 210, whose input terminal is used to connect to the first battery, whose output terminal is connected to the second power terminal 120, whose first controlled terminal is connected to the first power terminal 110, and whose second controlled terminal is used to connect to the external controller;

[0072] A second battery power supply circuit 220, whose input terminal is used to connect to the second battery, whose output terminal is connected to the second power terminal 120, whose third controlled terminal is connected to the first power terminal 110, and whose fourth controlled terminal is used to connect to the external controller;

[0073] A power supply control circuit 300, whose input end is connected to the first power supply end 110 and the second power supply end 120 respectively, and whose output end is used to connect to an external controller. The power supply control circuit 300 is used to connect the first power supply end 110 and the second power supply end 120 to their output ends respectively when triggered;

[0074] The first battery power supply circuit 210 and the second battery power supply circuit 220 are used to jointly disconnect the first battery and the second battery from the second power supply terminal 120 when the first power supply terminal 110 is connected to the adapter power supply; or,

[0075] Under the control of the external controller, the first battery or the second battery is connected to the second power terminal 120 .

[0076] In this embodiment, the multi-mode power supply circuit has a first power supply terminal 110 and a second power supply terminal 120, the first terminal is used to connect to the adapter power supply, and the second power supply terminal 120 is connected to the output terminal of the first battery power supply circuit 210 and the output terminal of the second battery power supply circuit 220 respectively, so that when the first battery power supply circuit 210 and the second battery power supply circuit 220 control the corresponding battery output, the battery power supply can be connected through the second power supply terminal 120, so that, using the multi-mode power supply circuit, the external controller can be powered by the adapter or the battery. At the same time, since the first battery power supply circuit 210 and the second battery power supply circuit 220 correspond to the control of the external controller, they can output separately or sequentially under the control according to the control signal of the external controller, so that the camera can realize multiple power supply modes such as single adapter power supply, adapter and single battery power supply, adapter and dual battery power supply, single battery power supply, dual battery power supply, etc.

[0077] Furthermore, it should be noted that since the first controlled end of the first battery power supply circuit 210 and the third controlled end of the second battery power supply circuit 220 are both connected to the first power supply end 110, when the first power supply end 110 is connected to the adapter power supply, the first battery power supply circuit 210 and the second battery power supply circuit 220 are turned off under the high level control of the adapter power supply, thereby enabling the highest priority output of the adapter power supply, and the camera will not waste the electrical energy stored in the battery when an external power supply is connected.

[0078] Specifically, when the camera is set to be powered by a separate adapter, or the camera is only connected to the adapter without a battery, the camera is in a separate adapter power supply state. At this time, when the user connects the adapter to the camera and presses the trigger device set in the power supply control circuit 300, the power supply control circuit 300 is triggered and turned on, and the adapter power supply is supplied to the external control through the first power supply terminal 110. If the adapter is no longer connected, the camera will be directly powered off.

[0079] When the camera is set to the adapter and single battery power supply mode, or when the camera only inserts the first battery / second battery, the camera is in the adapter and single battery power supply state. Take the camera inserting the first battery as an example for explanation: when the user connects the adapter to the camera and presses the trigger device set in the power supply control circuit 300, the power supply control circuit 300 is triggered and turned on, and the adapter power supply supplies power to the external control through the first power supply terminal 110. If the adapter is stopped from being connected, the first battery power supply circuit 210 stops receiving the high level of the adapter power supply and inputs the battery power output by the first battery into the second power supply terminal 120 to supply power to the external controller through the power supply control circuit 300.

[0080] When the camera is set to the adapter and dual-battery power supply mode, and the camera is simultaneously loaded with the first battery and the second battery, the camera is in the adapter and dual-battery power supply mode. At this time, if the user connects the adapter to the camera and presses the trigger device set in the power supply control circuit 300, the power supply control circuit 300 is triggered and turned on, and the adapter power supply supplies power to the external control through the first power supply terminal 110. If the adapter is stopped from being connected, the first battery power supply circuit 210 and the second battery power supply circuit 220 are turned on / off according to the received control signal. It can be understood that the first battery and the second battery are battery packs with integrated fuel gauges, which can The external controller can output the power information of its own battery to the external controller in real time, so that after the adapter power is stopped, the external controller can compare the current power of the two batteries through the internal integrated comparator, control the output of the battery with higher power until the power of the battery is exhausted, and then control the output of the other battery. For example, if the power of the first battery is higher than that of the second battery after the adapter power is stopped, the external controller outputs a connection control signal to the first power supply circuit to connect the first battery to the second power supply terminal 120 until the power of the first battery is exhausted, and then outputs a connection control signal to the second battery power supply circuit, so that the first battery and the second battery supply power to the external controller in turn.

[0081] When the camera is set to a single-battery power supply mode, or the camera only has the first battery or the second battery inserted and is not connected to an adapter, the camera is in a single-battery power supply state. The camera having the first battery inserted is used as an example for explanation: at this time, the first battery power supply circuit 210 connects the first battery to the second power supply terminal 120, and when the power supply control circuit 300 is triggered and connected, the first battery supplies power to the external control through the second power supply terminal 120.

[0082] When the camera is set to dual battery power supply mode, and the first battery and the second battery are placed in the camera at the same time, and the adapter is not connected, the camera is in dual battery power supply state. At this time, the external controller controls the first battery power supply circuit 210 and the second battery power supply circuit 220 to be turned on / off to control the output sequence of the first battery and the second battery.

[0083] The technical solution of the utility model can realize power supply for a variety of different power supply combination scenarios by adopting the power supply control circuit 300 to cooperate with the first battery power supply circuit 210 and the second battery power supply circuit 220, such as power supply for the product by a single power adapter, power supply for the product by a single battery pack, power supply for the product by a dual battery pack, power supply for the product by a power adapter and a single battery pack, power supply for the product by a power adapter and a dual battery pack, etc., which can meet the needs of complex application scenarios of the product, and by connecting two batteries respectively through the first battery power supply circuit 210 and the second battery power supply circuit 220, the user can easily expand the standby battery life of the product according to their own needs and reduce the number of charging times. In addition, when the external adapter loses power, the product monitoring still works, and the monitoring has no power-off blind spot.

[0084] Reference Figure 1 to Figure 2 In one embodiment, the first battery and the second battery are respectively used to output corresponding battery power, and the first battery power supply circuit 210 or the second battery power supply circuit 220 includes:

[0085] A selection control branch 221, wherein an input end of the selection control branch 221 is used to connect to the corresponding first battery or second battery, and a controlled end of the selection control branch 221 is used to connect to the external controller;

[0086] A switch control branch 222, wherein the input end of the switch control branch 222 is connected to the output end of the selection control branch 221, the first controlled end of the selection control branch 221 is connected to the first power supply end 110, the second controlled end of the selection control branch 221 is used to access the external controller, and the output end of the switch control branch 222 is connected to the second power supply end 120;

[0087] The switch control branch 222 is used to disconnect the output end of the selection control branch 221 from the second power supply terminal 120 when the first power supply terminal 110 is connected to the adapter power supply; or,

[0088] Under the control of the external controller, the battery power source is connected to the second power source terminal 120 together with the selection control branch 221 .

[0089] In this embodiment, when the adapter is connected, the switch control branch 222 is turned off under the control of the adapter power output by the first power supply terminal 110 to ensure the highest priority output of the adapter power. When the adapter is no longer connected, the switch control branch 222 is no longer controlled by the adapter power. At this time, the external controller controls the corresponding selection control branch 221 and the switch control branch 222 to be turned on according to the current power supply mode of the camera and the power information output by the power meter, so that the first battery or the second battery can supply power.

[0090] Reference Figure 2 , Figure 5 and Figure 6 In one embodiment, the first battery power supply circuit 210 or the second battery power supply circuit 220 further includes:

[0091] A first unidirectional conduction circuit 223 is connected in parallel to both ends of the switch control branch 222, and the first unidirectional conduction circuit 223 is used to control the adapter power to stop inputting power to the first battery and the second battery when the first power end is connected to the adapter power 110; and

[0092] It is used to output the battery power connected to the selection control branch 221 to the second power terminal 120 when the first power terminal 110 is not connected to the adapter power and the selection control branch 221 does not receive the shutdown control signal output by the external controller.

[0093] In this embodiment, the first unidirectional conducting circuit 223 may include a first diode D1 .

[0094] When the adapter is powered by a single battery or a dual battery, the battery is used as a backup power source. At this time, the selection control branch 221 corresponding to the selected battery remains connected under the control of the selection signal. When the adapter is connected, the switch control branches 222 connected to the first battery and the second battery are both turned off under the control of the adapter power supply. When the adapter stops being connected, the selected battery outputs the battery power through the selection control branch 221 through the first unidirectional conduction circuit 223 to the second power supply terminal 120, thereby achieving seamless connection of the battery power.

[0095] When the camera is in dual battery power supply mode, when the power supply control circuit 300 is triggered and turned on, the first battery power supply circuit 210 and the second battery power supply circuit 220 are both turned on, and the battery with a higher output voltage between the first battery and the second battery supplies power to the external control through the second power supply terminal 120, so that the external controller is powered on first.

[0096] Reference Figure 2 , Figure 5 and Figure 6In one embodiment, the switch control branch 222 includes:

[0097] A first switch tube Q1, where an input end of the first switch tube Q1 is used to connect to the first battery or the second battery, and an output end of the first switch tube Q1 is connected to the second power supply end 120;

[0098] A second switch tube Q2, an output end of which is grounded;

[0099] a first resistor R1 and a second resistor R2, wherein a first end of the first resistor R1 is connected to an output end of the first switch tube Q1, a second end of the first resistor R1 is connected to a first end of the second resistor R2, and a second end of the second resistor R2 is connected to an input end of the second switch tube Q2;

[0100] A third resistor R3 and a fourth resistor R4, wherein the first end of the third resistor R3 is used to be electrically connected to an external controller, the second end of the third resistor R3 is respectively connected to the first end of the fourth resistor R4 and the controlled end of the second switch tube Q2, and the second end of the fourth resistor R4 is grounded.

[0101] In this embodiment, the first switch tube Q1 is a high-power PMOS tube that can withstand the high-current output of the battery power supply, and the second switch tube Q2 is an ordinary NMOS tube. Through the combination of the first switch tube Q1 and the second switch tube Q2, the small current of the external controller can drive the high-power device.

[0102] When the first power supply terminal 110 is connected to the adapter power supply, the controlled end of the first switch tube Q1 is turned off under the control of the high level output of the adapter power supply. At the same time, since the voltage output by the adapter is higher than the voltage output by the battery, the unidirectional conduction circuit is cut off because the cathode voltage of its diode is higher than the anode voltage. Therefore, there is no circuit output to the second power supply terminal 120 at this time.

[0103] When the first power supply terminal 110 is not connected to the adapter power supply, if the second switch tube Q2 receives a high-level signal output by an external controller, the controlled end of the first switch tube Q1 is connected to the ground, so that the first switch tube Q1 is turned on under the control of a low level, and the diode of the unidirectional conduction circuit is short-circuited, so that the battery power connected to the selection control branch 221 is input into the second power supply terminal 120 through the first switch tube Q1.

[0104] Reference Figure 2 , Figure 5 and Figure 6 In one embodiment, the selection control branch 221 includes:

[0105] a third switch tube Q3, wherein an input end of the third switch tube Q3 is used to connect to the first battery or the second battery;

[0106] A fourth switch tube Q4, an output end of the fourth switch tube Q4 is grounded;

[0107] A fifth switch tube Q5, an output end of the fifth switch tube Q5 is grounded;

[0108] a fifth resistor R5 and a sixth resistor R6, wherein a first end of the fifth resistor R5 is connected to the input end of the third switch tube Q3, a second end of the fifth resistor R5 is respectively connected to the first end of the sixth resistor R6 and the controlled end of the fifth switch tube Q5, and a second end of the sixth resistor R6 is connected to the input end of the fourth switch tube Q4;

[0109] a seventh resistor R7, an eighth resistor R8 and a ninth resistor R9, wherein a first end of the seventh resistor R7 is connected to the input end of the third switch tube Q3, a second end of the seventh resistor R7 is respectively connected to the first end of the eighth resistor R8, the first end of the ninth resistor R9 and the controlled end of the fourth switch tube Q4, a second end of the eighth resistor R8 is connected to the input end of the fifth switch tube Q5, and a second end of the ninth resistor R9 is grounded;

[0110] A tenth resistor R10 and an eleventh resistor R11, wherein the first end of the tenth resistor R10 is used to be electrically connected to the external controller, the second end of the tenth resistor R10 is respectively connected to the first end of the eleventh resistor R11 and the controlled end of the fifth switch tube Q5, and the second end of the eleventh resistor R11 is grounded.

[0111] In this embodiment, the third switch tube Q3 is a high-power PMOS tube that can withstand the high-current output of the battery power supply. The fourth switch tube Q4 and the fifth switch tube Q5 are ordinary NMOS tubes that jointly drive the third switch tube Q3 to achieve a small current drive of the high-power device by the external controller.

[0112] Specifically, when the external controller needs to enable battery power supply, the selected selection control circuit is connected to a low-level selection signal, the fifth switch tube Q5 is turned off, so that the controlled end of the fourth switch tube Q4 is connected to the battery power supply through the seventh resistor R7, and is turned on under the high-level control of the battery power supply, and the controlled end of the third switch tube Q3 is grounded through the sixth resistor R6, so that the third switch tube Q3 is turned on under the control of a low level and the connected battery power supply is output.

[0113] The unselected selection control circuit is connected to a high level, so that the fifth switch tube Q5 is turned on, and only the controlled end of the fourth switch tube Q4 is grounded through the eighth resistor R8, so that the fourth switch tube Q4 is turned off under the control of the low level, and the controlled end of the third switch tube Q3 is connected to the battery power supply through the fifth resistor R5, and is turned off under the control of the high level of the battery power supply.

[0114] In addition, the fourth switch tube Q4 is also used to set an initial state for selecting the control branch 221 when the camera uses a battery power source alone. The initial state is that the camera is in a battery power supply mode and is not powered on. In the initial state, since the camera is not powered on, the controlled end of the fifth switch tube Q5 is not connected to the control signal and remains turned off. At this time, the controlled end of the fourth switch tube Q4 is connected to the battery power source through the seventh resistor R7, and the controlled end of the third switch tube Q3 is grounded through the sixth resistor R6, so that the third switch tube Q3 is turned on under the control of a low level, and the connected battery power is output, so that the external control circuit is powered on to drive the camera to work.

[0115] Reference Figure 2 , Figure 5 and Figure 6 In one embodiment, the first battery and the second battery are respectively used to output corresponding battery power, and the multi-mode power supply circuit further includes:

[0116] The second unidirectional conduction circuit 224 includes two unidirectional conduction branches, the input ends of the two unidirectional conduction branches are respectively connected to the first power supply end 110, and the output ends of the two unidirectional conduction branches are respectively connected to the first controlled end and the third controlled end. The second unidirectional conduction circuit 224 is used to control the power output of the adapter to flow unidirectionally from the first power supply end 110 to the first controlled end and the third controlled end when the first power supply end 110 is connected to the adapter; and

[0117] When the first power terminal 110 is not connected to the adapter, the battery power is controlled not to be output to the first power terminal 110 .

[0118] In this embodiment, the second unidirectional conducting circuit 224 may include a second diode D2 .

[0119] When the first power supply terminal 110 is connected to the adapter power supply, the anode voltage of the second diode D2 is higher than the cathode voltage. At this time, the second diode D2 is turned on to input the adapter power supply to the controlled end of the first switch tube Q1; when the first power supply terminal 110 is not connected to the adapter power supply, and the first switch tube Q1 connected to the second diode D2 outputs the connected battery power, the cathode voltage of the second diode D2 is higher than the anode voltage. At this time, the second diode D2 is reversely cut off to prevent the battery power from flowing back to the first power supply terminal 110.

[0120] Reference Figure 3 and Figure 7 In one embodiment, the power supply control circuit 300 includes:

[0121] A third unidirectional conducting circuit 330, wherein an input end of the third unidirectional conducting circuit 330 is connected to the first power source, and an output end of the third unidirectional conducting circuit 330 is connected to the second power source end 120;

[0122] A switch circuit 310, wherein the input end of the switch circuit 310 is respectively connected to the output end of the third unidirectional conduction circuit 330 and the second power supply end 120, and the output end of the switch circuit 310 is used to connect to the external controller;

[0123] A trigger component 320, wherein the trigger component 320 is connected to a controlled end of the switch circuit 310;

[0124] The trigger component 320 is used to control the switch circuit 310 to connect the output end of the third unidirectional conduction circuit 330 and the second power supply end 120 to the external controller respectively when triggered;

[0125] The third unidirectional conduction circuit 330 is used to control the power output by the adapter to flow unidirectionally from the first power terminal 110 to the second power terminal 120 or the external controller when the first power terminal 110 is connected to the adapter; and

[0126] When the first power end 110 is not connected to the adapter, the second power end 120 is controlled not to output power to the first power end 110 .

[0127] In this embodiment, the third unidirectional conduction circuit 330 includes an eighth switch tube, a ninth switch tube, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor and a nineteenth resistor, the input end of the eighth switch tube and the first end of the sixteenth resistor are connected to the first power supply end 110, and the second end of the sixteenth resistor is respectively connected to the controlled end of the ninth switch tube and the first end of the eighteenth resistor, the second end of the eighteenth resistor and the output end of the ninth resistor R9 are grounded, the seventeenth resistor is connected in series between the controlled end of the eighth switch tube and the input end of the ninth switch tube, and the nineteenth resistor is connected in parallel to the output end and the controlled end of the eighth switch tube, wherein the eighth switch tube is a high-power PMOS tube, and the ninth switch tube is an ordinary NMOS tube.

[0128] The switch circuit 310 includes a tenth switch tube, a twentieth resistor and a twenty-first resistor. The input end of the tenth switch tube is respectively connected to the output end of the third unidirectional conduction circuit 330, the second power supply end 120 and the first end of the twentieth resistor. The controlled end of the tenth switch tube is respectively connected to the second end of the twentieth resistor and the first end of the twenty-first resistor. The output end of the tenth switch tube is used to access an external controller. The second end of the twenty-first resistor is connected to the trigger component 320. The tenth switch tube is a high-power PMOS tube.

[0129] The trigger component 320 can be a key switch, a reset switch, etc.

[0130] Specifically, when starting the camera, the user closes the trigger component 320, so that the tenth switch tube is grounded through the twenty-first resistor, and the tenth switch tube is turned on under the control of a low level, connecting the output end of the third unidirectional conduction circuit 330 and the second power supply end 120 to the external controller.

[0131] When the third unidirectional conduction circuit 330 is connected to the adapter power supply, the controlled end of the ninth switch tube receives a high level through the sixteenth resistor, and the ninth switch tube grounds the eighth switch tube through the seventeenth resistor, so that the eighth switch tube is turned on under the control of a low level, and the adapter power supply is output to the external controller through the tenth switch tube.

[0132] When the third unidirectional conduction circuit 330 is not connected to the adapter power supply, the controlled end of the ninth switch tube is grounded via the eighteenth resistor, and the ninth switch tube is turned off under the control of the low level. At this time, since the second power supply terminal 120 is connected to the battery power supply, the controlled end of the eighth switch tube receives a high level via the nineteenth resistor, and the eighth switch tube cuts off the path between the second power supply terminal 120 and the first power supply terminal 110, so that the battery power cannot flow back to the first power supply terminal 110 when supplying power to the external controller.

[0133] Reference Figures 4 to 8 In one embodiment, the multi-mode power supply circuit further includes:

[0134] The charging control circuit 400 comprises two charging control branches, wherein the input ends of the two charging control branches are respectively connected to the second power supply end 120, the output ends of the two charging control branches are respectively electrically connected to the first battery and the second battery, and the controlled ends of the two charging control branches are respectively used to be electrically connected to the external controller;

[0135] The charging control circuit 400 is used to connect / disconnect the first battery and / or the second battery to the second power supply terminal 120 under the control of the external controller to charge / stop charging the first battery and / or the second battery.

[0136] It can be understood that since the first battery and the second battery are battery packs with fuel meters, the external controller can detect the remaining power of the two batteries in real time. The external controller has a reference power pre-stored therein. When it is detected that the remaining power of any battery is lower than the reference power, the external controller can control the corresponding charging control branch to be connected to charge the first battery and / or the second battery.

[0137] Specifically, the charging control branch includes:

[0138] a sixth switch tube Q6, wherein an input end of the sixth switch tube Q6 is used to connect to the first battery or the second battery, and an output end of the sixth switch tube Q6 is connected to the first power supply end 110;

[0139] A seventh switch tube Q7, an output end of the seventh switch tube Q7 is grounded;

[0140] a twelfth resistor R12 and a thirteenth resistor R13, wherein a first end of the twelfth resistor R12 is connected to the first power supply end 110, a second end of the twelfth resistor R12 is respectively connected to the controlled end of the sixth switch tube Q6 and the first end of the thirteenth resistor R13, and a second end of the thirteenth resistor R13 is connected to the input end of the seventh switch tube Q7;

[0141] A fourteenth resistor R14 and a fifteenth resistor R15, wherein the first end of the fourteenth resistor R14 is used to be electrically connected to the external controller, the second end of the fourteenth resistor R14 is respectively connected to the controlled end of the seventh switch tube Q7 and the first end of the fifteenth resistor R15, and the second end of the fifteenth resistor R15 is grounded.

[0142] In this embodiment, the sixth switch tube Q6 is a high-power PMOS tube that can withstand the high current output of the battery power supply. The seventh switch tube Q7 is an ordinary NMOS tube that is used to drive the third switch tube Q3 to achieve a small current drive of a high-power device by an external controller.

[0143] Taking the case where the remaining power of the first battery is lower than the reference power as an example, at this time, the external controller outputs a high-level control signal to the charging control branch corresponding to the first battery, so that the seventh switch tube Q7, under the control of the high level, connects the controlled end of the sixth switch tube Q6 to the ground via the thirteenth resistor R13, and the sixth switch tube Q6 is turned on under the control of the low level, so that the first power supply terminal 110 is connected to the first battery, and the first battery is powered by the adapter power supply.

[0144] The utility model also proposes a camera, which includes a controller, a first battery, a second battery and a multi-mode power supply circuit, wherein the multi-mode power supply circuit has multiple first input terminals, second input terminals, a fifth controlled terminal and a sixth controlled terminal, the multiple first input terminals are respectively connected to the first battery and the second battery, the second input terminal and the fifth controlled terminal are used to access an adapter, and the output terminal of the multi-mode power supply circuit and the sixth controlled terminal are respectively connected to the controller; the specific structure of the multi-mode power supply circuit refers to the above-mentioned embodiment. Since the present camera adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0145] 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 multi-mode power supply circuit, characterized in that: include: A first power supply terminal, used to connect to an adapter power supply; a second power supply terminal; A first battery power supply circuit, whose input end is used to connect to the first battery, whose output end is connected to the second power supply end, whose first controlled end is connected to the first power supply end, and whose second controlled end is used to connect to an external controller; A second battery power supply circuit, whose input end is used to connect to the second battery, whose output end is connected to the second power supply end, whose third controlled end is connected to the first power supply end, and whose fourth controlled end is used to connect to the external controller; A power supply control circuit, whose input end is connected to the first power supply end and the second power supply end respectively, and whose output end is used to connect to the external controller, and the power supply control circuit is used to connect the first power supply end and the second power supply end to their output ends respectively when triggered; The first battery power supply circuit and the second battery power supply circuit are used to jointly disconnect the first battery and the second battery from the second power supply end when the first power supply end is connected to the adapter power supply; or, Under the control of the external controller, the first battery or the second battery is connected to the second power terminal.

2. The multi-mode power supply circuit according to claim 1, characterized in that: The first battery and the second battery are respectively used to output corresponding battery power supplies, and the first battery power supply circuit or the second battery power supply circuit includes: A selection control branch, wherein an input end of the selection control branch is used to connect to the corresponding first battery or second battery, and a controlled end of the selection control branch is used to connect to the external controller; a switch control branch, wherein an input end of the switch control branch is connected to an output end of the selection control branch, a first controlled end of the selection control branch is connected to the first power supply end, a second controlled end of the selection control branch is used to access the external controller, and an output end of the switch control branch is connected to the second power supply end; The switch control branch is used to disconnect the output end of the selection control branch from the second power end when the first power end is connected to the adapter power; or Under the control of the external controller, the battery power source is connected to the second power source terminal together with the selection control branch.

3. The multi-mode power supply circuit according to claim 2, characterized in that: The first battery powered circuit or the second battery powered circuit further comprises: A first unidirectional conduction circuit is connected in parallel to both ends of the switch control branch, and the first unidirectional conduction circuit is used to control the adapter power to stop inputting power to the first battery and the second battery when the first power end is connected to the adapter power; and When the first power supply end is not connected to the adapter power supply and the selection control branch does not receive the shutdown control signal output by the external controller, the battery power connected to the selection control branch is output to the second power supply end.

4. The multi-mode power supply circuit according to claim 2, characterized in that: The switch control branch comprises: a first switch tube, wherein an input end of the first switch tube is used to connect to the first battery or the second battery, and an output end of the first switch tube is connected to the second power supply end; A second switch tube, an output end of which is grounded; a first resistor and a second resistor, wherein a first end of the first resistor is connected to an output end of the first switch tube, a second end of the first resistor is connected to a first end of the second resistor, and a second end of the second resistor is connected to an input end of the second switch tube; A third resistor and a fourth resistor, wherein the first end of the third resistor is used to be electrically connected to an external controller, the second end of the third resistor is respectively connected to the first end of the fourth resistor and the controlled end of the second switch tube, and the second end of the fourth resistor is grounded.

5. The multi-mode power supply circuit according to claim 2, characterized in that: The selection control branch comprises: a third switch tube, wherein an input end of the third switch tube is used to connect to the first battery or the second battery; A fourth switch tube, an output end of the fourth switch tube is grounded; A fifth switch tube, an output end of the fifth switch tube is grounded; a fifth resistor and a sixth resistor, wherein a first end of the fifth resistor is connected to the input end of the third switch tube, a second end of the fifth resistor is respectively connected to the first end of the sixth resistor and the controlled end of the fifth switch tube, and a second end of the sixth resistor is connected to the input end of the fourth switch tube; a seventh resistor, an eighth resistor and a ninth resistor, wherein a first end of the seventh resistor is connected to the input end of the third switch tube, a second end of the seventh resistor is respectively connected to the first end of the eighth resistor, the first end of the ninth resistor and the controlled end of the fourth switch tube, a second end of the eighth resistor is connected to the input end of the fifth switch tube, and a second end of the ninth resistor is grounded; A tenth resistor and an eleventh resistor, wherein the first end of the tenth resistor is used to be electrically connected to the external controller, the second end of the tenth resistor is respectively connected to the first end of the eleventh resistor and the controlled end of the fifth switch tube, and the second end of the eleventh resistor is grounded.

6. The multi-mode power supply circuit according to claim 1, characterized in that: The first battery and the second battery are respectively used to output corresponding battery power supplies, and the multi-mode power supply circuit further includes: a second unidirectional conduction circuit, comprising two unidirectional conduction branches, wherein input ends of the two unidirectional conduction branches are respectively connected to the first power supply end, and output ends of the two unidirectional conduction branches are respectively connected to the first controlled end and the third controlled end, wherein the second unidirectional conduction circuit is used to control the power output by the adapter to flow unidirectionally from the first power supply end to the first controlled end and the third controlled end when the first power supply end is connected to the adapter; and When the first power supply end is not connected to the adapter, the battery power is controlled not to be output to the first power supply end.

7. The multi-mode power supply circuit according to claim 1, characterized in that: The power supply control circuit comprises: a third unidirectional conducting circuit, wherein an input end of the third unidirectional conducting circuit is connected to the first power supply, and an output end of the third unidirectional conducting circuit is connected to the second power supply; a switch circuit, wherein the input end of the switch circuit is respectively connected to the output end of the third unidirectional conduction circuit and the second power supply end, and the output end of the switch circuit is used to connect to the external controller; A trigger component connected to a controlled end of the switch circuit; The trigger component is used to control the switch circuit to connect the output end of the third unidirectional conduction circuit and the second power supply end to the external controller respectively when being triggered; The third unidirectional conduction circuit is used to control the power output by the adapter to flow unidirectionally from the first power supply end to the second power supply end or the external controller when the first power supply end is connected to the adapter; and When the first power end is not connected to the adapter, the second power end is controlled not to output to the first power end.

8. The multi-mode power supply circuit according to claim 1, characterized in that: The multi-mode power supply circuit further includes: A charging control circuit, comprising two charging control branches, wherein input ends of the two charging control branches are respectively connected to the second power supply end, output ends of the two charging control branches are respectively electrically connected to the first battery and the second battery, and controlled ends of the two charging control branches are respectively used to be electrically connected to the external controller; The charging control circuit is used to connect / disconnect the first battery and / or the second battery to the second power supply terminal under the control of the external controller, so as to charge / stop charging the first battery and / or the second battery.

9. The multi-mode power supply circuit according to claim 8, characterized in that: The charging control branch comprises: a sixth switch tube, wherein an input end of the sixth switch tube is used to connect to the first battery or the second battery, and an output end of the sixth switch tube is connected to the first power supply end; A seventh switch tube, an output end of the seventh switch tube is grounded; a twelfth resistor and a thirteenth resistor, wherein a first end of the twelfth resistor is connected to the first power supply end, a second end of the twelfth resistor is respectively connected to the controlled end of the sixth switch tube and the first end of the thirteenth resistor, and a second end of the thirteenth resistor is connected to the input end of the seventh switch tube; A fourteenth resistor and a fifteenth resistor, wherein the first end of the fourteenth resistor is used to be electrically connected to the external controller, the second end of the fourteenth resistor is respectively connected to the controlled end of the seventh switch tube and the first end of the fifteenth resistor, and the second end of the fifteenth resistor is grounded.

10. A camera, characterized in that: It comprises a controller, a first battery, a second battery and a multi-mode power supply circuit as claimed in any one of claims 1 to 9; The multi-mode power supply circuit has multiple first input terminals, second input terminals, fifth controlled terminals and sixth controlled terminals. The multiple first input terminals are respectively connected to the first battery and the second battery. The second input terminal and the fifth controlled terminal are used to connect to the adapter. The output terminal of the multi-mode power supply circuit and the sixth controlled terminal are respectively connected to the controller.

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