A low voltage difference power supply circuit and a portable low power consumption device

Abstract

The present invention discloses a low-voltage difference power supply circuit and a portable low-power consumption device. The low-voltage difference power supply circuit comprises a key module connected to an input end of a trigger module through a driving module, an output end of the trigger module connected to an OTG end of a power management module, a power supply end of the power management module connected to a power supply end of a battery mainboard, and the power supply end of the power management module is also connected to a battery socket through a field effect tube module, and a battery is connected to the battery socket. Through the embodiments of the present invention, by controlling the OTG end of the power management module, the requirement of same input and same output in low-power consumption devices is solved, the overall power consumption of low-power consumption devices is significantly reduced, and the requirements of energy conservation and emission reduction are met.

Description

Technical Field

[0001] The present invention relates to the field of Internet of Things, and in particular to a low voltage difference power supply circuit and a portable low power consumption device. Background Art

[0002] The conventional method to prevent reverse current injection for low power consumption is to use a diode, but the diode has a minimum voltage drop of 0.3V and cannot output in reverse. There are integrated circuits in the industry that use USB PD power supply, but the cost and volume cannot be reduced, and the circuit is complex, which is not suitable for low power consumption applications. Summary of the invention

[0003] In view of the above technical problems, the present invention provides a low voltage difference power supply circuit and a portable low power consumption device.

[0004] The first aspect of the present invention provides a low voltage difference power supply circuit, including a key module connected to the input end of a trigger module through a driving module, the output end of the trigger module is connected to the OTG end of a power management module, the power end of the power management module is connected to the power end of a battery mainboard, the power end of the power management module is also connected to a battery socket through a field effect tube module, and a battery is connected to the battery socket.

[0005] Optionally, one end of the button module is connected to the second pin of the driving module, the fourth pin of the driving module is connected to the first pin of the trigger module, the second pin of the trigger module is connected to the third pin of the trigger module, and the third pin of the trigger module is connected to the OTG end of the power management module.

[0006] Optionally, the field effect transistor module includes a first group and a second group, the first group includes a first field effect transistor, a second field effect transistor and a third field effect transistor, and the second group includes a sixth field effect transistor, a seventh field effect transistor and an eighth field effect transistor.

[0007] Optionally, the third pin of the driving module is connected to the ground, the third pin of the trigger module is connected to the gate of the second field effect transistor, the drain of the second field effect transistor is respectively connected to the gate of the first field effect transistor and the gate of the third field effect transistor, the drain of the first field effect transistor is connected to the power end of the power management module, the source of the third field effect transistor is respectively connected to the source of the first field effect transistor and the drain of the second field effect transistor, and the drain of the third field effect transistor is connected to the power end of the battery socket.

[0008] Optionally, the fifth pin of the trigger module is connected to the gate of the seventh field effect transistor in the second group, the drain of the seventh field effect transistor is respectively connected to the gate of the sixth field effect transistor and the gate of the eighth field effect, the drain of the sixth field effect transistor is connected to the power end of the power management module, the source of the sixth field effect transistor is respectively connected to the drain of the seventh field effect transistor and the source of the eighth field effect transistor, and the drain of the eighth field effect transistor is connected to the power end of the battery socket.

[0009] Optionally, the power supply terminal of the battery mainboard is connected to the reverse isolation module via the VBUS pin of the TYPE-C chip, and the reverse isolation module is connected to the power supply terminal of the power management module. Optionally, the power management module is a BQ25606 chip.

[0010] Optionally, the power supply terminal of the battery socket is connected to the anode of the light-emitting diode through a resistor, and the cathode of the light-emitting diode is grounded.

[0011] Optionally, the power supply end of the battery socket is also connected to an expansion board.

[0012] A second aspect of the present invention further provides a portable low-power consumption device, comprising the low voltage difference power supply circuit as described above.

[0013] The embodiment of the present invention provides a low-voltage difference power supply circuit and a portable low-power consumption device, including a key module connected to the input end of a trigger module through a driving module, the output end of the trigger module connected to the OTG end of a power management module, the power end of the power management module connected to the power end of a battery mainboard, the power end of the power management module is also connected to a battery socket through a field effect tube module, and a battery is connected to the battery socket. Through the embodiment of the present invention, by controlling the OTG end of the power management module, the requirement of same input and same output in low-power consumption devices is solved, the overall power consumption of low-power consumption devices is significantly reduced, and the requirements of energy conservation and emission reduction are met. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the low voltage difference power supply circuit connection in an embodiment of the present invention;

[0015] Figure 2 A schematic diagram of the circuit connection of the key module, the driving module and the trigger module in an embodiment of the present invention;

[0016] Figure 3 A schematic diagram of the circuit connection of a power management module in an embodiment of the present invention;

[0017] Figure 4 A schematic diagram of a first group circuit connection in an embodiment of the present invention;

[0018] Figure 5 A schematic diagram of a second grouping circuit connection in an embodiment of the present invention;

[0019] Figure 6 A schematic diagram of the circuit connection of the isolation module in an embodiment of the present invention;

[0020] Figure 7 Schematic diagram of the structure of the expansion board connection in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1 An embodiment of the present invention provides a low voltage difference power supply circuit, including a button module 101 connected to the input end of a trigger module 103 through a driving module 102, the output end of the trigger module 103 is connected to the OTG end of a power management module 104, the power end of the power management module 104 is connected to the power end of a battery mainboard 105, and the power end of the power management module 104 is also connected to a battery socket through a field effect tube module 106, and a battery 107 is connected to the battery socket.

[0023] The power management module is a BQ25606 chip, which has an OTG function and a dedicated OTG pin to control whether OTG output is enabled.

[0024] like Figure 2 As shown, one end of the key module K1 is connected to the second pin of the driving module U1, the fourth pin of the driving module U1 is connected to the first pin of the trigger module U6, the second pin of the trigger module U6 is connected to the third pin of the trigger module, and the third pin of the trigger module is connected to the OTG end of the power management module U4. When the trigger module U6 receives the start signal of the key module, it flips and inputs it to the OTG pin of the power management module U4.

[0025] Alternatively, if Figure 3 As shown, the power supply end of the power management module 104 is also connected to the battery socket through the field effect tube module 106, and the battery socket is connected to the battery 107. Specifically, the field effect tube module 106 includes a first group and a second group, wherein the circuit connection diagram of the first group is as shown in Figure 4The first group includes a first field effect transistor, a second field effect transistor and a third field effect transistor. The third pin of the driving module U1 is connected to the ground, the third pin of the trigger module is connected to the gate of the second field effect transistor, the drain of the second field effect transistor Q2 is respectively connected to the gate of the first field effect transistor Q1 and the gate of the third field effect transistor Q3, the drain of the first field effect transistor Q1 is connected to the power supply end of the power management module 104, the source of the third field effect transistor Q3 is respectively connected to the source of the first field effect transistor Q1 and the drain of the second field effect transistor Q2, and the drain of the third field effect transistor Q3 is connected to the power supply end of the battery socket J7.

[0026] The circuit connection diagram of the second group is as follows Figure 5 , the second group includes the sixth field effect transistor, the seventh field effect transistor and the eighth field effect transistor.

[0027] The fifth pin of the trigger module is connected to the gate of the seventh field effect transistor Q7 in the second group, the drain of the seventh field effect transistor Q7 is respectively connected to the gate of the sixth field effect transistor Q6 and the gate of the eighth field effect transistor Q8, the drain of the sixth field effect transistor Q6 is connected to the power end of the power management module, the source of the sixth field effect transistor Q6 is respectively connected to the drain of the seventh field effect transistor Q7 and the source of the eighth field effect transistor Q8, and the drain of the eighth field effect transistor Q8 is connected to the power end of the battery socket J7.

[0028] like Figure 6 As shown, the power supply end of the battery mainboard is connected to the reverse isolation module through the VBUS pin of the TYPE-C chip, and the reverse isolation module is connected to the power supply end of the power management module.

[0029] The battery motherboard inputs 5V power through the type C port and enters the ideal diode Q11 for reverse isolation after passing through the protection circuit. Among them, the ideal diode Q11 is the reverse isolation module, and the reverse isolation module is as follows Figure 6 As shown, a discrete ideal diode circuit is used in the invention to isolate the reverse output while reducing the voltage drop and power consumption generated by the physical diode. Assuming that the power consumption generated by a current of 1 ampere disappears, P=UI, then 0.3W of power consumption is lost.

[0030] Optionally, the power supply terminal of the battery socket is connected to the anode of the light emitting diode D4 through a resistor, and the cathode of the light emitting diode is grounded.

[0031] Optionally, the power supply terminal of the battery socket is also connected to the expansion board.

[0032] like Figure 7As shown, the power end of the power socket, that is, the mainboard 801, can also be connected to the battery expansion board 803 through the metering chip 802, allowing the mainboard to charge the expansion board battery and also allowing the expansion board to supply power to the mainboard, depending on whether the expansion board is turned on.

[0033] In the specific power supply process, when the K1 button is pressed, it enters the D flip-flop U6 after being triggered by U1. When U6 receives the start signal of the button, it flips and enters the OTG pin state of the switch U4.

[0034] When button K1 turns on the OTG function of U4 (set to low), the OTG function of U4 is turned on, Q6 and Q8 are turned on, Q1 and Q3 are turned off, and the battery voltage flows through the chip and is output through the 1 / 24 pin of the chip, and flows through Q6, Q8, Q13 to reach the 1st and 3rd pins of the J7 connector.

[0035] When the button K1 turns off the OTG function of U4 (set to high), the OTG function of U4 is turned off, the power charging function is turned on, Q6 and Q8 are turned off, Q1 and Q3 are turned on, and the motherboard voltage flows through Q3, Q1, and D4 through the 1st and 3rd pins of the J7 socket to reach the chip, and the 1st and 24th pins of the J7 socket charge the battery. Figure 3 and Figure 4 . At the same time, the corresponding light D4 will light up.

[0036] An embodiment of the present invention provides a low-voltage difference power supply circuit, including a key module connected to the input end of a trigger module through a driving module, the output end of the trigger module connected to the OTG end of a power management module, the power end of the power management module connected to the power end of a battery mainboard, the power end of the power management module is also connected to a battery socket through a field effect tube module, and a battery is connected to the battery socket. Through the embodiment of the present invention, by controlling the OTG end of the power management module, the requirement of same input and same output in low-power devices is solved, the overall power consumption of the low-power devices is significantly reduced, and the requirements of energy conservation and emission reduction are met.

[0037] The present invention also provides a portable low-power consumption device, comprising the above-mentioned low voltage difference power supply circuit.

[0038] An embodiment of the present invention provides a portable low-power device, including a key module connected to the input end of a trigger module through a driving module, the output end of the trigger module connected to the OTG end of a power management module, the power end of the power management module connected to the power end of a battery mainboard, the power end of the power management module is also connected to a battery socket through a field effect tube module, and a battery is connected to the battery socket. Through the embodiment of the present invention, by controlling the OTG end of the power management module, the requirement of same input and same output in the low-power device is solved, the overall power consumption of the low-power device is significantly reduced, and the requirements of energy conservation and emission reduction are met.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low voltage difference power supply circuit, characterized in that: The key module is connected to the input end of the trigger module through the driving module, the output end of the trigger module is connected to the OTG end of the power management module, the power end of the power management module is connected to the power end of the battery mainboard, the power end of the power management module is also connected to the battery socket through the field effect tube module, and the battery socket is connected to a battery; One end of the button module is connected to the second pin of the driving module, the fourth pin of the driving module is connected to the first pin of the trigger module, the second pin of the trigger module is connected to the third pin of the trigger module, and the third pin of the trigger module is connected to the OTG end of the power management module; The field effect tube module includes a first group and a second group, the first group includes a first field effect tube, a second field effect tube and a third field effect tube, and the second group includes a sixth field effect tube, a seventh field effect tube and an eighth field effect tube; The third pin of the driving module is connected to the ground, the third pin of the trigger module is connected to the gate of the second field effect transistor, the drain of the second field effect transistor is respectively connected to the gate of the first field effect transistor and the gate of the third field effect transistor, the drain of the first field effect transistor is connected to the power supply end of the power management module, the source of the third field effect transistor is respectively connected to the source of the first field effect transistor and the drain of the second field effect transistor, and the drain of the third field effect transistor is connected to the power supply end of the battery socket; The fifth pin of the trigger module is connected to the gate of the seventh field effect tube in the second group, the drain of the seventh field effect tube is respectively connected to the gate of the sixth field effect tube and the gate of the eighth field effect tube, the drain of the sixth field effect tube is connected to the power supply end of the power management module, the source of the sixth field effect tube is respectively connected to the drain of the seventh field effect tube and the source of the eighth field effect tube, and the drain of the eighth field effect tube is connected to the power supply end of the battery socket; The power supply end of the battery mainboard is connected to the reverse isolation module through the VBUS pin of the TYPE-C chip, and the reverse isolation module is connected to the power supply end of the power management module.

2. The low voltage difference power supply circuit according to claim 1, characterized in that: The power management module is a BQ25606 chip.

3. The low voltage difference power supply circuit according to claim 1, characterized in that: The power supply end of the battery socket is connected to the anode of the light emitting diode through a resistor, and the cathode of the light emitting diode is grounded.

4. The low voltage difference power supply circuit according to claim 1, characterized in that: The power supply end of the battery socket is also connected to the expansion board.

5. A portable low-power device, characterized in that: The invention comprises the low voltage difference power supply circuit as described in any one of claims 1 to 4.

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