Power supply circuit and electronic equipment

Abstract

The utility model provides a power supply circuit and electronic equipment, and the power supply circuit comprises a first power supply circuit which is connected with a load circuit and is used for supplying power to the load circuit; the second power circuit is connected with the first power circuit in parallel and used for supplying power to a load circuit; and the adjusting unit is connected in series with the second power supply circuit and is used for reducing the power supply current of the second power supply circuit for supplying power to the load circuit without influencing the power supply current of the first power supply circuit when the first power supply circuit supplies power to the load circuit.

Description

Technical Field

[0001] This utility model relates to the field of power supply technology, and to power supply circuits and electronic equipment, but is not limited to them. Background Technology

[0002] Currently, in the power supply circuit of a server motherboard, even if an external power supply is already providing power to the server motherboard, the battery power supply will still continue to supply power to the server motherboard. This power supply situation of the battery power supply is considered a leakage situation, which will greatly shorten the battery's lifespan.

[0003] Therefore, when an external power supply is used to power the load on a server, reducing battery leakage and extending battery life are urgent technical problems that need to be solved. Utility Model Content

[0004] This utility model mainly provides a power supply circuit and electronic device that can reduce battery power leakage and extend battery power life.

[0005] The technical solution of this utility model embodiment is implemented as follows:

[0006] This utility model provides a power supply circuit, including:

[0007] A first power supply circuit is connected to the load circuit to supply power to the load circuit.

[0008] The second power supply circuit is connected in parallel with the first power supply circuit to supply power to the load circuit.

[0009] An adjustment unit, connected in series with the second power supply circuit, is used to reduce the supply current of the second power supply circuit to the load circuit when the first power supply circuit supplies power to the load circuit without affecting the supply current of the first power supply circuit.

[0010] In some embodiments, the second power supply circuit includes a second unit, a resistor, and a battery power supply, wherein the battery power supply is connected to the load circuit through the resistor and the second unit.

[0011] If the first power supply circuit does not provide current to the load circuit, the regulating unit connected in series with the second power supply circuit will not affect the second power supply circuit's supply of power to the load circuit.

[0012] In some embodiments, the regulating unit is connected in series between the resistor and the second unit; or the regulating unit is connected in series between the second unit and the load circuit; wherein the regulating unit has unidirectional conductivity.

[0013] In some embodiments, the adjustment unit and the second unit have the same structure and the same conductive direction.

[0014] In some embodiments, the first power supply circuit includes a first unit and a power interface, the power interface being connected to the load circuit through the first unit, and the voltage difference of the first unit being greater than the voltage difference of the regulating unit.

[0015] In some embodiments, when the first power supply circuit supplies power to the load circuit, the supply voltage of the power interface is greater than the supply voltage of the battery power supply; the supply voltage of the power interface through the first unit is equal to the supply voltage of the battery power supply through the second unit and the regulating unit.

[0016] In some embodiments, the first unit has unidirectional conductivity, and the conductivity direction of the first unit is different from that of the adjustment unit.

[0017] In some embodiments, the second power supply circuit is not connected in series with the regulating unit and has a first power supply current, and the second power supply circuit is connected in series with the regulating unit and has a second power supply current, wherein the second power supply current is less than the first power supply current.

[0018] In some embodiments, the first power supply circuit is connected to the load circuit and has a third power supply current, which is greater than the second power supply current.

[0019] The electronic device provided in this embodiment of the utility model includes:

[0020] A carrier, which is connected to a load circuit, is used to connect functional units;

[0021] A power supply circuit, connected to the load circuit, the power supply circuit comprising:

[0022] A first power supply circuit is connected to the load circuit to supply power to the load circuit.

[0023] The second power supply circuit is connected in parallel with the first power supply circuit to supply power to the load circuit.

[0024] An adjustment unit, connected in series with the second power supply circuit, is used to reduce the supply current of the second power supply circuit to the load circuit when the first power supply circuit supplies power to the load circuit without affecting the supply current of the first power supply circuit. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0026] Figure 1 A schematic diagram of the composition structure of a power supply circuit provided for an embodiment of this utility model;

[0027] Figure 2 A schematic diagram of the composition structure of a second power supply circuit provided for an embodiment of this utility model;

[0028] Figure 3 A schematic diagram of the conductive direction of the adjustment unit and the second unit provided in this embodiment of the utility model;

[0029] Figure 4 A schematic diagram of the composition structure of a first power supply circuit provided for an embodiment of this utility model;

[0030] Figure 5 A schematic diagram of the composition structure of the first power supply circuit and the load circuit provided for an embodiment of this utility model;

[0031] Figure 6 A schematic diagram of another power supply circuit provided for an embodiment of this utility model;

[0032] Figure 7 A schematic diagram of the composition structure of another power supply circuit provided in an embodiment of this utility model;

[0033] Figure 8 A schematic diagram of the pressure difference between the first unit and the adjustment unit provided in this embodiment of the present invention;

[0034] Figure 9 This is a diagram of a power supply circuit structure;

[0035] Figure 10 This is a schematic diagram of the diode's current-voltage characteristic curve;

[0036] Figure 11 A power supply circuit structure provided in this embodiment of the utility model Figure 1 ;

[0037] Figure 12 A power supply circuit structure provided in this embodiment of the utility model Figure 2 ;

[0038] Figure 13 A schematic diagram of the diode's current-voltage characteristic curve is provided for an embodiment of this utility model;

[0039] Figure 14 This is a schematic diagram of the composition structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on the present utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0042] In the following description, the terms "first, second, third" are used merely to distinguish similar objects and do not represent a specific ordering of objects. It is understood that "first, second, third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of the present invention described herein can be implemented in an order other than that illustrated or described herein.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing embodiments of the invention only and is not intended to limit the invention.

[0044] To address the problems existing in related technologies, this utility model provides a power supply circuit comprising: a first power supply circuit connected to a load circuit for supplying power to the load circuit; a second power supply circuit connected in parallel with the first power supply circuit for supplying power to the load circuit; and an adjustment unit connected in series with the second power supply circuit for reducing the supply current of the second power supply circuit to the load circuit when the first power supply circuit supplies power to the load circuit without affecting the supply current of the first power supply circuit. Thus, when the first power supply circuit supplies power to the load circuit, the adjustment unit can achieve voltage division of the second power supply circuit, thereby reducing the current supplied by the second power supply circuit to the load circuit, i.e., reducing the leakage current of the battery power supply, and thus extending the service life of the battery power supply.

[0045] This utility model provides a schematic diagram of the composition structure of a power supply circuit, as shown in the embodiment. Figure 1 As shown, the power supply circuit 10 includes a first power supply circuit 101, a second power supply circuit 102, and an adjustment unit 103.

[0046] In some embodiments, the first power supply circuit 101 is connected to the load circuit 20 to supply power to the load circuit 20.

[0047] In some embodiments, the second power supply circuit 102 is connected in parallel with the first power supply circuit 101 to supply power to the load circuit 20.

[0048] Here, the second power supply circuit 102 is a different circuit from the first power supply circuit 101. The first power supply circuit 101 is the power supply circuit of the electronic device body, and the second power supply circuit 102 is the battery power supply circuit.

[0049] In some embodiments, the adjustment unit 103 is connected in series with the second power supply circuit 102 to reduce the supply current of the second power supply circuit 102 to the load circuit 20 when the first power supply circuit 101 supplies power to the load circuit 20 without affecting the supply current of the first power supply circuit 101.

[0050] Here, the adjustment unit 103 can divide the voltage of the second power supply circuit 102, thereby reducing the power supply current provided by the second power supply circuit 102 to the load circuit 20.

[0051] Here, the adjustment unit 103 has unidirectional conductivity. The adjustment unit 103 can be any electronic component with unidirectional conductivity; for example, the adjustment unit 103 can be a unidirectional conductive diode.

[0052] In this embodiment, the adjustment unit 103 can reduce the supply current of the second power circuit 102 without affecting the power supply effect of the first power circuit 101 when the first power circuit 101 supplies power to the load circuit 20, thereby extending the service life of the battery power supply 1021. The adjustment unit 103 can also directly supply power to the load circuit 20 without affecting the power supply effect when the first power circuit 101 is not supplying power to the load circuit 20.

[0053] A schematic diagram of the composition structure of a second power supply circuit provided in this embodiment of the present invention is shown below. Figure 2 As shown, the second power supply circuit 102 includes a battery power supply 1021, a resistor 1022, and a second unit 1023.

[0054] Here, the negative terminal of the battery power supply 1021 is grounded through a wire, the positive terminal of the battery power supply 1021 is connected to one end of the resistor 1022, the other end of the resistor 1022 is connected to the positive terminal of the second unit 1023, and the negative terminal of the second unit 1023 is connected to the load circuit 20.

[0055] In some embodiments, the battery power supply 1021 is connected to the load circuit 20 through the resistor 1022 and the second unit 1023. The battery power supply 1021, the resistor 1022 and the second unit 1023 are connected in series. The battery power supply 1021, the resistor 1022 and the second unit 1023 can be directly connected, or the battery power supply 1021, the resistor 1022 and the second unit 1023 can be connected through wires. No specific limitation is made in this regard.

[0056] Here, if the first power supply circuit 101 does not provide current to the load circuit 20, the regulating unit 103 connected in series in the second power supply circuit 102 will not affect the second power supply circuit 102 supplying power to the load circuit 20.

[0057] Here, when the first power supply circuit 101 does not supply current to the load circuit 20, the current supplied by the second power supply circuit 102 to the load circuit 20 is greater than the current supplied by the second power supply circuit 102 when the first power supply circuit 101 supplies current to the load circuit 20, which can meet the needs of the load circuit 20. Although the regulating unit 103 connected in series with the second power supply circuit 102 will reduce the supply current of the second power supply circuit 102, it still does not affect the normal power supply of the second power supply circuit 102 to the load circuit 20.

[0058] It should be noted that when the first power supply circuit 101 provides current to the load circuit 20, the second unit 1023, resistor 1022 and adjustment unit 103 will reduce the supply current of the second power supply circuit 102. Moreover, the first power supply circuit 101 will also have a significant impact on the supply current of the second power supply circuit 102. As a result, the supply current of the second power supply circuit 102 will become smaller, or even negligible, thereby reducing the leakage of the battery power supply 1021.

[0059] Here, the second unit 1023 has unidirectional conductivity. The second unit 1023 can be any electronic component with unidirectional conductivity; for example, the second unit 1023 can be a unidirectional conductive diode.

[0060] Here, the structures of the adjustment unit 103 and the second unit 1023 can be the same, and the conductive directions of the adjustment unit 103 and the second unit 1023 are the same, such as... Figure 3 The diagram shows the conductive direction of the adjustment unit and the second unit.

[0061] Here, the direction of conduction can characterize the direction of the conductive current. The conduction directions of the regulating unit 103 and the second unit 1023 are the same, indicating that the direction of the conductive current in the regulating unit 103 and the second unit 1023 are the same. This means that the conductive current in the regulating unit 103 and the second unit 1023 are used to supply power to the load circuit 20.

[0062] A schematic diagram of the composition structure of a first power supply circuit provided in this embodiment of the present invention is shown below. Figure 4 As shown, the first power supply circuit 101 includes a first unit 1011 and a power interface 1012.

[0063] Here, the output terminal of the power interface 1012 is connected to the positive terminal of the first unit 1011.

[0064] In some embodiments, the power interface 1012 and the first unit 1011 are connected in series. The power interface 1012 and the first unit 1011 can be directly connected, or the power interface 1012 and the first unit 1011 can be connected by a wire. No specific limitation is made in this regard.

[0065] The schematic diagram of the composition structure of the first power supply circuit and the load circuit provided in this embodiment of the utility model is as follows: Figure 5 As shown.

[0066] Here, the power interface 1012 is connected to the load circuit 20 through the first unit 1011. That is, the output terminal of the power interface 1012 is connected to the positive terminal of the first unit 1011, the negative terminal of the first unit 1011 is connected to one end of the load circuit 20, and the other end of the load circuit 20 is grounded through a wire.

[0067] In some embodiments, the power interface 1012, the first unit 1011, and the load circuit 20 are connected in series. The power interface 1012, the first unit 1011, and the load circuit 20 can be directly connected, or the power interface 1012, the first unit 1011, and the load circuit 20 can be connected by wires. No specific limitation is made in this regard.

[0068] A schematic diagram of another power supply circuit structure provided in this embodiment of the present invention is shown below. Figure 6 As shown, the adjustment unit 103 is connected in series between the resistor 1022 and the second unit 1023.

[0069] Here, the positive terminal of the battery power supply 1021 is connected to one end of the resistor 1022, the other end of the resistor 1022 is connected to the positive terminal of the adjustment unit 103, and the negative terminal of the adjustment unit 103 is connected to the positive terminal of the second unit 1023.

[0070] In some embodiments, the battery power supply 1021, resistor 1022, adjustment unit 103 and second unit 1023 are connected in series. The battery power supply 1021, resistor 1022, adjustment unit 103 and second unit 1023 can be directly connected, or the battery power supply 1021, resistor 1022, adjustment unit 103 and second unit 1023 can be connected by wires. No specific limitation is made in this regard.

[0071] Here, the adjustment unit 103 is connected in series between the resistor 1022 and the second unit 1023 to divide the supply voltage provided by the battery power supply 1021, so as to reduce the supply current of the battery power supply 1021.

[0072] Here, resistor 1022 is used to limit the supply current of battery power supply 1021. Resistor 1022 is connected in series between battery power supply 1021 and regulating unit 103 to block a large amount of current from flowing to regulating unit 103, thereby preventing regulating unit 103 from being burned out.

[0073] A schematic diagram of another power supply circuit structure provided in this embodiment of the present invention is shown below. Figure 7 As shown, the adjustment unit 103 is connected in series between the second unit 1023 and the load circuit 20.

[0074] Here, one end of resistor 1022 is connected to the positive terminal of the second unit 1023, the negative terminal of the second unit 1023 is connected to the positive terminal of the adjustment unit 103, the negative terminal of the adjustment unit 103 is connected to the load circuit 20, and the other end of the load circuit 20 is grounded through a wire.

[0075] In some embodiments, the resistor 1022, the second unit 1023, the adjustment unit 103, and the load circuit 20 are connected in series. The resistor 1022, the second unit 1023, the adjustment unit 103, and the load circuit 20 can be directly connected, or the resistor 1022, the second unit 1023, the adjustment unit 103, and the load circuit 20 can be connected by wires. No specific limitation is made in this regard.

[0076] Here, the regulating unit 103 is connected in series between the second unit 1023 and the load circuit 20 to divide the supply voltage provided by the battery power supply 1021, so as to reduce the supply current of the battery power supply 1021.

[0077] Here, the other end of the load circuit 20 is grounded through a wire in order to make the circuit conduct.

[0078] As mentioned above Figures 6 to 7 As shown, whether the adjustment unit 103 is connected in series between the second unit 1023 and the load circuit 20, or in series between the resistor 1022 and the second unit 1023, the adjustment unit 103 can divide the supply voltage provided by the battery power supply 1021, thereby reducing the supply current of the battery power supply 1021 and extending the service life of the battery power supply 1021.

[0079] A schematic diagram of the pressure difference between the first unit and the regulating unit provided in this embodiment of the invention is shown below. Figure 8 As shown, the pressure difference corresponding to the first unit 1011 is greater than the pressure difference corresponding to the regulating unit 103.

[0080] Here, the voltage difference of the first unit 1011 can be the difference in voltage values ​​between the two ends of the first unit 1011; the voltage difference of the regulating unit 103 can be the difference in voltage values ​​between the two ends of the regulating unit 103.

[0081] For example, the pressure difference of the first unit 1011 can be any value, for example, the pressure difference of the first unit 1011 can be 0.36V; the pressure difference of the regulating unit 103 can be any value, for example, the pressure difference of the regulating unit 103 can be 0.09V.

[0082] Here, the voltage difference corresponding to the first unit 1011 is greater than the voltage difference corresponding to the regulating unit 103, indicating that the first power supply circuit 101 where the first unit 1011 is located mainly supplies power to the load circuit 20.

[0083] In some embodiments, when the first power supply circuit 101 supplies power to the load circuit 20, the supply voltage of the power interface 1012 is greater than the supply voltage of the battery power supply 1021; the supply voltage of the power interface 1012 through the first unit 1011 is equal to the supply voltage of the battery power supply 1021 through the second unit 1023 and the regulating unit 103.

[0084] It should be noted that the power interface 1012 is connected to AC power. Here, AC power can be any voltage value, for example, AC power can be 220V.

[0085] It should be noted that the battery power supply 1021 does not reach the 220V AC mains voltage, so the voltage provided by the battery power supply 1021 is less than the voltage provided by the power interface 1012. In other words, the voltage of the battery power supply 1021 is lower than the external voltage. Therefore, the first power supply circuit 101 mainly supplies power to the load circuit 20.

[0086] In some embodiments, the conductive direction of the first unit 1011 is different from the conductive direction of the adjustment unit 103.

[0087] Here, the first unit 1011 has unidirectional conductivity. The first unit 1011 can be any electronic component with unidirectional conductivity. For example, the first unit 1011 can be a unidirectional conductive diode.

[0088] Here, the direction of conduction can characterize the direction of the conduction current. The direction of conduction of the first unit 1011 is different from that of the adjustment unit 103, which can characterize that the direction of the conduction current of the first unit 1011 is different from that of the conduction current of the adjustment unit 103.

[0089] Here, the conductive current of the first unit 1011 and the conductive current of the regulating unit 103 both flow to the load circuit 20; the direction of the conductive current of the first unit 1011 and the conductive current of the regulating unit 103 is determined by the characteristics of the unidirectional diode; the conductive direction of the first unit 1011 is different from that of the regulating unit 103 in order to prevent the external power supply from charging the battery.

[0090] As mentioned above Figures 2 to 7 As shown, the second power supply circuit 102 without the series-connected regulating unit 103 has a first supply current. The second power supply circuit 102 with the series-connected regulating unit 103 has a second supply current, which is less than the first supply current.

[0091] Here, the first power supply current can be the current at resistor 1022. The second power supply current can be the current at adjustment unit 103 or second unit 1023.

[0092] Here, the first supply current can be any value, for example, the first supply current can be 10uA; the second supply current can be any value, for example, the second supply current can be 0.7uA.

[0093] It should be noted that when the first power supply circuit 101 does not supply power to the load circuit 20, the supply current of the second power supply circuit 102 to the load circuit 20 is greater than the second supply current of 0.7uA.

[0094] Here, the first power supply circuit 101 is connected to the load circuit 20 and has a third power supply current, which is greater than the second power supply current.

[0095] Here, the third power supply current can be the current at the first unit 1011.

[0096] Here, the third power supply current can be any value, for example, the third power supply current can be 10000uA.

[0097] Here, the third power supply current is greater than the second power supply current, indicating that the first power supply circuit 101 is the main power source for the load circuit 20.

[0098] This utility model embodiment provides a power supply circuit, comprising: a first power supply circuit connected to a load circuit for supplying power to the load circuit; a second power supply circuit connected in parallel with the first power supply circuit for supplying power to the load circuit; and an adjustment unit connected in series with the second power supply circuit, used to reduce the supply current of the second power supply circuit to the load circuit when the first power supply circuit supplies power to the load circuit without affecting the supply current of the first power supply circuit. Thus, when the first power supply circuit supplies power to the load circuit, the adjustment unit can achieve voltage division of the second power supply circuit, thereby reducing the current supplied by the second power supply circuit to the load circuit, i.e., reducing the leakage current of the battery power supply, and thus extending the service life of the battery power supply.

[0099] Based on the above embodiments, the power supply circuit provided by the present invention will be described in detail below in conjunction with specific application scenarios.

[0100] Before describing the embodiments of this application, there is an existing power supply circuit structure diagram, such as Figure 9 As shown, the power supply circuit includes: a unidirectional diode D1, a resistor R1, and a battery power supply; the positive terminal of the unidirectional diode D1 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the positive terminal of the battery power supply, and the other end of the battery power supply is grounded through a wire.

[0101] The power supply circuit also includes: a unidirectional diode D2 and a power interface P3V3_AUX; the power interface P3V3_AUX is connected to one end of the load X through the unidirectional diode D2, the cathode of the unidirectional diode D1 is connected to one end of the load X, and the other end of the load X is grounded through a wire.

[0102] Here, the load X can be any object being powered. For example, the load X can be a motherboard chip or a chip clock.

[0103] When the load X is powered through the power interface P3V3_AUX, the battery power supply will also supply power to the load X. This power supply current from the battery power supply is considered leakage current, which will greatly shorten the battery's lifespan.

[0104] Here, the power supply voltage of the power interface P3V3_AUX is 3.3V, the power supply voltage of the battery power supply is 3.12V, the power supply voltage at the node between unidirectional diodes D1 and D2 is 2.94V, the voltage difference between the power supply voltage at unidirectional diode D1 and the power supply voltage at the node is ΔD1, that is, ΔD1 is 0.18V, and the voltage difference between the power supply voltage at unidirectional diode D2 and the power supply voltage at the node is ΔD2, that is, ΔD2 is 0.36V.

[0105] like Figure 10 The schematic diagram of the diode's current-voltage characteristic curve shows that the supply current is 10uA when the supply voltage difference is 0.18V and 10000uA when the supply voltage difference is 0.36V.

[0106] Here, the battery life calculation is: 220mAh / 10uA = 2.5. That is, when the battery power supply provides 10uA, the battery life is 2.5 years, while the actual battery life is 3 years. It is evident that leakage in the battery power supply will shorten the battery life. Specifically, when power is supplied to load X through the power interface P3V3_AUX, the battery power supply also supplies power to load X, leading to severe leakage and thus affecting its lifespan.

[0107] This utility model embodiment proposes a power supply circuit structure. Figure 1 ,like Figure 11As shown, the power supply circuit includes a power interface P3V3_AUX, diode Dn, diode Dm, resistor R1, battery power supply, and diode Ds.

[0108] Here, diode Dn corresponds to the first unit 1011 mentioned above; power interface P3V3_AUX corresponds to the power interface 1012 mentioned above; diode Dm corresponds to the second unit 1023 mentioned above; resistor R1 corresponds to the resistor 1022 mentioned above; battery power supply corresponds to the battery power supply 1021 mentioned above; and diode Ds corresponds to the adjustment unit 103 mentioned above.

[0109] Here, the output terminal of the power interface P3V3_AUX is connected to the positive terminal of diode Dn; the negative terminal of the battery power supply is grounded through a wire, the positive terminal of the battery power supply is connected to one end of resistor R1, the other end of resistor R1 is connected to the positive terminal of diode Dm, and the negative terminal of diode Dm is connected to the positive terminal of diode Ds.

[0110] It should be noted that the negative terminals of diodes Dn and Ds are respectively connected to one end of load X in the load circuit, and the other end of load X is grounded through a wire.

[0111] This utility model embodiment proposes a power supply circuit structure. Figure 2 ,like Figure 12 As shown, the power supply circuit includes a power interface P3V3_AUX, diode Dn, diode Dm, resistor R1, battery power supply, and diode Ds.

[0112] Here, diode Dn corresponds to the first unit 1011 mentioned above; power interface P3V3_AUX corresponds to the power interface 1012 mentioned above; diode Dm corresponds to the second unit 1023 mentioned above; resistor R1 corresponds to the resistor 1022 mentioned above; battery power supply corresponds to the battery power supply 1021 mentioned above; and diode Ds corresponds to the adjustment unit 103 mentioned above.

[0113] Here, the output terminal of the power interface P3V3_AUX is connected to the positive terminal of diode Dn; the negative terminal of the battery power supply is grounded through a wire, the positive terminal of the battery power supply is connected to one end of resistor R1, the other end of resistor R1 is connected to the positive terminal of diode Ds, and the negative terminal of diode Ds is connected to the positive terminal of diode Dm.

[0114] It should be noted that the negative terminals of diodes Dn and Dm are respectively connected to one end of load X in the load circuit, and the other end of load X is grounded through a wire.

[0115] Here, when the power supply is turned on at the power interface P3V3_AUX and the load circuit is supplied with power, the voltage of the battery power supply can be divided by the diode Ds, thereby reducing the current supplied by the battery power supply to the load circuit, that is, reducing the leakage current of the battery power supply, so as to extend the service life of the battery power supply.

[0116] Here, the power supply voltage of the power interface P3V3_AUX can be any value, for example, the power supply voltage of the power interface P3V3_AUX can be 3.3V, the power supply voltage of the battery power supply can be any value, for example, the power supply voltage of the battery power supply can be 3.12V, and the power supply voltage at the node between diodes Dm and Dn can be any value, for example, the power supply voltage at the node between diodes Dm and Dn can be 2.94V.

[0117] Here, the voltage difference between the supply voltage at diode Dm and the supply voltage at the node is ΔDm.

[0118] △Dm can be any voltage difference value, for example, △Dm can be 0.09V; the voltage difference between the supply voltage at diode Ds and the supply voltage at the node is △Ds, △Ds can be any voltage difference value, for example, △Ds can be 0.09V; the voltage difference between the supply voltage at diode Dn and the supply voltage at the node is △Dn, △Dn can be any voltage difference value, for example, △Dn can be 0.36V.

[0119] This utility model embodiment presents a schematic diagram of the diode's current-voltage characteristic curve, as shown below. Figure 13 As shown, the diode current-voltage characteristic curve is obtained based on the power supply circuit proposed in this application.

[0120] Depend on Figure 13 It can be seen that the supply current is 0.7uA when the voltage difference is 0.09V, 10uA when the voltage difference is 0.18V, and 10000uA when the voltage difference is 0.36V.

[0121] Here, the battery life calculation is: 220mAh / 0.7uA = 35.8. That is to say, when the battery is powered by a power source of 0.7uA, the battery life is 35.8 years, which is much greater than the normal battery life of 3 years.

[0122] It is evident that reducing battery leakage can effectively extend battery life. Specifically, when power is supplied to the load circuit via the P3V3_AUX power interface, diode Ds can be used to divide the voltage of diode Dm, thereby reducing the current supplied by the battery to the load circuit, and thus reducing battery leakage.

[0123] Based on the above embodiments, the present invention provides a schematic diagram of the composition structure of an electronic device, as shown below. Figure 14 As shown, the electronic device 30 includes:

[0124] Carrier 301 is connected to load circuit 20 and is used to connect functional unit; wherein, functional unit can be any powered electronic component, for example, functional unit can be motherboard chip or chip clock;

[0125] Here, the load circuit can be a circuit connected to the carrier, or it can be a line on the carrier;

[0126] Power supply circuit 10, connected to load circuit, includes:

[0127] The first power supply circuit 101 is connected to the load circuit to supply power to the load circuit.

[0128] The second power supply circuit 102 is connected in parallel with the first power supply circuit 101 to supply power to the load circuit.

[0129] The adjustment unit 103 is connected in series with the second power supply circuit 102 and is used to reduce the supply current of the second power supply circuit 102 to the load circuit when the first power supply circuit 101 supplies power to the load circuit without affecting the supply current of the first power supply circuit 101.

[0130] Here, the second power supply circuit 102 includes a second unit, a resistor, and a battery power supply. The battery power supply is connected to the load circuit through the resistor and the second unit. If the first power supply circuit 101 does not provide current to the load circuit, the regulating unit connected in series in the second power supply circuit 102 does not affect the second power supply circuit's power supply to the load circuit.

[0131] Thus, when the first power supply circuit supplies power to the load circuit, the voltage of the second power supply circuit can be divided by the adjustment unit, thereby reducing the current supplied by the second power supply circuit to the load circuit, that is, reducing the leakage current of the battery power supply, and extending the service life of the battery power supply.

[0132] It should be understood that the phrases "some embodiments" or "an embodiment" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this disclosure. Therefore, "some embodiments" or "an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this utility model, the sequence numbers of the above-described steps / processes do not imply a sequential order of execution; the execution order of each step / process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this disclosure. The sequence numbers of the above-described embodiments are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0133] It should be noted that, in this utility model, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0134] It should also be noted that, in the several embodiments provided by this utility model, it should be understood that the disclosed device can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

[0135] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units; some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, in the various embodiments of this utility model, all functional units may be integrated into one processing unit, or each unit may be a separate unit, or two or more units may be integrated into one unit; the integrated unit may be implemented in hardware or in a combination of hardware and software functional units.

[0136] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A power supply circuit, characterized in that, include: A first power supply circuit is connected to the load circuit to supply power to the load circuit. The second power supply circuit is connected in parallel with the first power supply circuit to supply power to the load circuit. An adjustment unit, connected in series with the second power supply circuit, is used to reduce the supply current of the second power supply circuit to the load circuit when the first power supply circuit supplies power to the load circuit without affecting the supply current of the first power supply circuit; the second power supply circuit is a battery power supply circuit.

2. The power supply circuit according to claim 1, characterized in that, The second power supply circuit includes a second unit, a resistor, and a battery power supply, wherein the battery power supply is connected to the load circuit through the resistor and the second unit; If the first power supply circuit does not provide current to the load circuit, the regulating unit connected in series with the second power supply circuit will not affect the second power supply circuit's supply of power to the load circuit.

3. The power supply circuit according to claim 2, characterized in that, The regulating unit is connected in series between the resistor and the second unit; or the regulating unit is connected in series between the second unit and the load circuit; wherein the regulating unit has unidirectional conductivity.

4. The power supply circuit according to claim 3, characterized in that, The adjustment unit and the second unit have the same structure, and the adjustment unit and the second unit have the same conductive direction.

5. The power supply circuit according to claim 2, characterized in that, The first power supply circuit includes a first unit and a power interface. The power interface is connected to the load circuit through the first unit, and the voltage difference of the first unit is greater than the voltage difference of the regulating unit.

6. The power supply circuit according to claim 5, characterized in that, When the first power supply circuit supplies power to the load circuit, the supply voltage of the power interface is greater than the supply voltage of the battery power supply; the supply voltage of the power interface through the first unit is equal to the supply voltage of the battery power supply through the second unit and the regulating unit.

7. The power supply circuit according to claim 5, characterized in that, The first unit has unidirectional conductivity, and the conductivity direction of the first unit is different from that of the adjustment unit.

8. The power supply circuit according to claim 1, characterized in that, The second power supply circuit, which is not connected in series with the regulating unit, has a first power supply current. The second power supply circuit, which is connected in series with the regulating unit, has a second power supply current, which is less than the first power supply current.

9. The power supply circuit according to claim 8, characterized in that, The first power supply circuit is connected to the load circuit and has a third power supply current, which is greater than the second power supply current.

10. An electronic device, characterized in that, include: A carrier, which is connected to a load circuit, is used to connect functional units; A power supply circuit, connected to the load circuit, the power supply circuit comprising: A first power supply circuit is connected to the load circuit to supply power to the load circuit. The second power supply circuit is connected in parallel with the first power supply circuit to supply power to the load circuit. An adjustment unit, connected in series with the second power supply circuit, is used to reduce the supply current of the second power supply circuit to the load circuit when the first power supply circuit supplies power to the load circuit without affecting the supply current of the first power supply circuit; the second power supply circuit is a battery power supply circuit.

Images