CN211701852U - Voltage reduction module and mobile terminal - Google Patents
Voltage reduction module and mobile terminal Download PDFInfo
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- CN211701852U CN211701852U CN202020465904.2U CN202020465904U CN211701852U CN 211701852 U CN211701852 U CN 211701852U CN 202020465904 U CN202020465904 U CN 202020465904U CN 211701852 U CN211701852 U CN 211701852U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a step-down module and mobile terminal. The voltage reduction module is arranged between a battery and an electricity utilization module of the mobile terminal in series and comprises a first voltage reduction circuit, a second voltage reduction circuit and a switch control circuit; the input end of the switch control circuit is grounded, the output end of the switch control circuit is connected with a second enabling signal receiving terminal of the second voltage reduction circuit, and the control end of the switch control circuit is connected with an output prompt terminal of the first voltage reduction circuit; the output prompt terminal is used for outputting a first control signal to the control end when the first voltage reduction circuit works so as to control the second voltage reduction circuit to stop working; and outputting a second control signal to the control end when the first voltage reduction circuit stops working so as to control the second voltage reduction circuit to be conducted. Because the output voltage of the first voltage output terminal is greater than the output voltage of the second voltage output terminal, the normal work of the power utilization module is ensured, and because the static working current of the first voltage reduction circuit is greater than the static working current of the second voltage reduction circuit, the shutdown power consumption is reduced, and the shutdown standby time is prolonged.
Description
Technical Field
The embodiment of the utility model provides a relate to terminal equipment and make the field, especially relate to a step-down module and mobile terminal.
Background
The mobile terminal is a portable device, and the use of the mobile terminal is not limited by time and space, so that the requirements of schedule life and work of a user are greatly met. When the mobile terminal is in a starting state, a rechargeable battery is used for providing power for the central processing unit, the controller and the like so as to maintain the normal operation of the mobile terminal; when the mobile terminal is in a power-off state, the battery does not need to supply power to the central processing unit. However, no matter whether the mobile terminal is in the on state or not, the power management unit inside the mobile terminal needs to be continuously powered on to ensure the correctness of the display time.
In the prior art, firstly, the voltage output by the battery is subjected to voltage reduction processing through the direct current-direct current voltage reduction chip and then continuously supplied to the power management unit, but when the mobile terminal is in a shutdown state, because the power consumption of the direct current-direct current voltage reduction chip is large, the quiescent current is 200uA at the lowest, the shutdown power consumption is large, and the shutdown standby time is short; secondly, the voltage output by the battery is subjected to voltage reduction processing through the low dropout regulator and then continuously supplied to the power management unit, but when the mobile terminal is in a starting state, part of functional modules may not be operated due to the fact that the low dropout regulator outputs a small current and cannot load a load with a large resistance value, and user experience is affected.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a step-down module and mobile terminal reduces the shutdown consumption under the condition of guaranteeing user experience degree, improves the stand-by time of shutting down.
In a first aspect, an embodiment of the present invention provides a voltage reduction module, which is serially connected between a battery and an electricity consumption module of a mobile terminal, and includes a first voltage reduction circuit, a second voltage reduction circuit and a switch control circuit;
the first voltage reduction circuit comprises a first voltage output terminal and an output prompt terminal;
the second voltage reduction circuit comprises a second voltage receiving terminal, a second voltage output terminal, a second enable signal receiving terminal and a pull-up resistor, wherein a first end of the pull-up resistor is connected with the second voltage receiving terminal, and a second end of the pull-up resistor is connected with the second enable signal receiving terminal;
the switch control circuit comprises an input end, an output end and a control end, wherein the input end is grounded, the output end is connected with the second enabling signal receiving terminal, and the control end is connected with the output prompting terminal;
the output prompt terminal is used for outputting a first control signal to the control end when the first voltage reduction circuit works, controlling the second enabling signal receiving terminal to receive a second non-enabling signal and controlling the second voltage reduction circuit to stop working; the first voltage reduction circuit is used for outputting a first control signal to the control end when the first voltage reduction circuit stops working, controlling the first enable signal receiving terminal to receive a first enable signal and controlling the first voltage reduction circuit to be conducted;
wherein the output voltage of the first voltage output terminal is greater than the output voltage of the second voltage output terminal, and the quiescent operating current of the first step-down circuit is greater than the quiescent operating current of the second step-down circuit.
Optionally, the mobile terminal further includes a controller; the first voltage-reducing circuit further comprises a first enable signal receiving terminal; the first enable signal receiving terminal is connected with the controller; the controller is used for sending a first enabling signal or a first non-enabling signal; the first enabling signal receiving terminal is used for receiving the first enabling signal and controlling the first voltage reduction circuit to work when the mobile terminal is started; and the first voltage reduction circuit is also used for receiving the first non-enabling signal and controlling the first voltage reduction circuit to stop working when the mobile terminal is powered off.
Optionally, the first enable signal is a high-level signal, and the first disable signal is a low-level signal; the second enable signal is a high level signal, and the second disable signal is a low level signal; the switch control circuit is an N-type transistor.
Optionally, the first voltage-reducing circuit further includes a first voltage receiving terminal; the first voltage receiving terminal and the second voltage receiving terminal are both connected to the battery.
Optionally, the voltage reduction module further includes a first capacitor and a first resistor; a first end of the first capacitor is connected with an output end of the battery, the first voltage receiving terminal and the second voltage receiving terminal respectively, and a second end of the first capacitor is grounded; the first end of the first resistor is connected with the first enabling signal receiving terminal and the control module respectively, and the second end of the first resistor is grounded.
Optionally, the quiescent operating current of the second voltage-reducing circuit is less than 100 uA.
Optionally, the first voltage-reducing circuit further includes an output voltage feedback terminal; the voltage reduction module further comprises a second resistor and a third resistor; the output voltage feedback terminal is respectively connected with the first end of the second resistor and the first end of the third resistor, the second end of the second resistor is grounded, and the second end of the third resistor is connected with the first voltage output terminal.
Optionally, the first voltage-reducing circuit further includes a bootstrap capacitor terminal; the voltage reduction module further comprises a second capacitor and a fourth resistor; the bootstrap capacitor terminal is connected to a first end of the fourth resistor, a second end of the fourth resistor is connected to a first end of the second capacitor, and a second end of the second capacitor is connected to the first voltage output terminal.
Optionally, the voltage reduction module further includes an inductor, a third capacitor, a fourth capacitor, a first diode, and a second diode; the first end of the inductor is connected with the first voltage output terminal, the second end of the inductor is respectively connected with the first end of the third capacitor and the anode of the first diode, the second end of the third capacitor is grounded, and the cathode of the first diode is connected with the electricity utilization module; the first end of the fourth capacitor is connected with the second voltage output terminal and the anode of the second diode respectively, the second end of the fourth capacitor is grounded, and the cathode of the second diode is connected with the power utilization module.
In a second aspect, an embodiment of the present invention provides a mobile terminal, including any one of the voltage reduction modules provided by the first aspect, further including a power supply and a power utilization module, the voltage reduction module is connected in series with the power supply and between the power utilization modules.
The technical scheme of the embodiment of the utility model, through setting up first step-down circuit, second step-down circuit and on-off control circuit, the control end of on-off control circuit is connected to the output suggestion terminal of first step-down circuit, and the output suggestion terminal is connected to the output of on-off control circuit, and when mobile terminal was in the power on state, first step-down circuit worked and exported first control signal, and the on-off control circuit exports the second after receiving first control signal and does not enable the signal, and the second step-down circuit stops working after receiving the second and does not enable the signal; when the mobile terminal is in a power-off state, the first voltage reduction circuit stops working and outputs a second control signal, the control end of the switch control circuit receives the second control signal and then the output end outputs a second enabling signal, and the second voltage reduction circuit starts working after receiving the second enabling signal. Because the output voltage of the first voltage output terminal is greater than the output voltage of the second voltage output terminal, the mobile terminal has higher output power in a starting state, can load larger loads and ensures the normal work of the power utilization module; meanwhile, because the static working current of the first voltage reduction circuit is larger than that of the second voltage reduction circuit, when the mobile terminal is in a shutdown state; the method has the advantages of having smaller quiescent current, reducing shutdown power consumption and improving shutdown standby time.
Drawings
Fig. 1 is a schematic structural diagram of a voltage reducing module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a voltage reduction module according to an embodiment of the present invention. As shown in fig. 1, the voltage-reducing module 100 is serially connected between a battery and a power-consuming module of the mobile terminal, and the voltage-reducing module 100 includes a first voltage-reducing circuit 110, a second voltage-reducing circuit 120 and a switch control circuit 130.
The first voltage-decreasing circuit 110 includes a first voltage output terminal SW and an output cue terminal PG.
The second voltage dropping circuit 120 includes a second voltage receiving terminal VCC, a second voltage output terminal VOUT, a second enable signal receiving terminal EN2, and a pull-up resistor R, a first end of the pull-up resistor R being connected to the second voltage receiving terminal VCC, and a second end of the pull-up resistor R being connected to the second enable signal receiving terminal EN 2;
the switch control circuit 130 includes an input terminal S, an output terminal D, and a control terminal G, the input terminal S is grounded, the output terminal D is connected to the second enable signal receiving terminal EN2, and the control terminal G is connected to the output prompt terminal PG.
The output prompt terminal PG is configured to output a first control signal to the control terminal G when the first voltage reduction circuit 110 operates, control the second enable signal receiving terminal EN2 to receive the second disable signal, and control the second voltage reduction circuit 120 to stop operating; the voltage regulator is further configured to output a second control signal to the control terminal G when the first voltage-reducing circuit 110 stops operating, control the second enable signal receiving terminal EN2 to receive the second enable signal, and control the second voltage-reducing circuit 120 to be turned on;
the output voltage of the first voltage output terminal SW is greater than the output voltage of the second voltage output terminal VOUT, and the static working current of the first voltage reduction circuit is greater than the static working current of the second voltage reduction circuit.
Specifically, the output prompt terminal PG of the first voltage-reducing circuit 110 is used to indicate whether the first voltage-reducing circuit 110 is working normally. For example, a preset output voltage value is set in the first voltage-reducing circuit 110, when the output voltage of the first voltage-reducing circuit 110 reaches 95% of the preset output voltage value, the first voltage-reducing circuit 110 is considered to be in a working state, and at this time, the output prompt terminal PG outputs a high-level signal; when the output voltage of the first voltage-reducing circuit 110 does not reach 95% of the preset output voltage value, the first voltage-reducing circuit 110 is considered to be not working, and at this time, the output prompt terminal PG outputs a low level signal.
When the mobile terminal is in a power-on state, the first voltage reduction circuit 110 is in a working state, the output prompt terminal PG of the first voltage reduction circuit 110 outputs a high-level signal, the control terminal G of the switch control circuit 130 receives the high-level signal output by the output prompt terminal PG, the output terminal D outputs a second non-enable signal, the second enable signal receiving terminal EN2 of the second voltage reduction circuit 120 receives the second non-enable signal, and the second voltage reduction circuit 120 does not work; when the mobile terminal is in a shutdown state, the first voltage reduction circuit 110 is in a stop working state, the output prompt terminal PG of the first voltage reduction circuit 110 outputs a low level signal, the control terminal G of the switch control circuit 130 receives the low level signal output by the output prompt terminal PG, the output terminal D outputs a second enable signal, the second enable signal receiving terminal EN2 of the second voltage reduction circuit 120 receives the second enable signal, the second voltage reduction circuit 120 works normally, when the mobile terminal is started, voltage is provided for the power utilization module through the first voltage reduction circuit 110, and when the mobile terminal is shut down, voltage is provided for the power utilization module through the second voltage reduction circuit 120.
For example, the first voltage-reducing circuit 110 may select a dc-dc voltage-reducing chip, the quiescent current of which is as low as 200uA, and which can provide a larger voltage during normal operation; the second step-down circuit 120 may be a low dropout Regulator (LDO) that provides a small voltage with a quiescent current of less than 5uA during normal operation.
In the embodiment of the application, the output voltage of the first voltage output terminal is greater than the output voltage of the second voltage output terminal, so that a power supply with higher power can be provided when the mobile terminal is in a starting state, and the normal operation of a power utilization module in the mobile terminal can be ensured; meanwhile, the static working current of the first voltage reduction circuit is larger than that of the second voltage reduction circuit, so that the power consumption of the voltage reduction module is low when the mobile terminal is in a shutdown state, the shutdown power consumption of the mobile terminal can be reduced, and the shutdown standby time is prolonged.
Optionally, with continued reference to fig. 1, the mobile terminal further comprises a controller 140; the first voltage-decreasing circuit 110 further includes a first enable signal receiving terminal EN 1; the first enable signal receiving terminal EN1 is connected to the controller 140; a controller 140 for transmitting the first enable signal or the first disable signal.
The first enable signal receiving terminal EN1 is used for receiving a first enable signal and controlling the first voltage reduction circuit 110 to operate when the mobile terminal is turned on; and is further configured to receive the first disable signal when the mobile terminal is powered off, and control the first voltage reduction circuit 110 to stop working.
Specifically, the Controller 140 is a switch Unit integrated in an Embedded Controller (EC) or a Central Processing Unit (CPU), when the mobile terminal is in a power-on state, the switch Unit is turned on to output a high-level signal, i.e., a first enable signal, the first enable signal receiving terminal EN1 receives the first enable signal, and the first voltage-reducing circuit 110 starts to operate; when the mobile terminal is in a power-off state, the switch unit is turned off, a low level signal, that is, a first disable signal is output, the first enable signal receiving terminal EN1 receives the first disable signal, and the first voltage-reducing circuit 110 stops operating.
In the embodiment of the application, the controller can output different signals according to the state of the mobile terminal so as to change the working state of the first voltage reduction circuit.
Optionally, with reference to fig. 1, the switch control circuit 130 is an N-type transistor, the first enable signal is a high-level signal, and the first disable signal is a low-level signal; the second enable signal is a high level signal and the second disable signal is a low level signal.
Specifically, the active enable signals of the first voltage-reducing circuit 110 and the second voltage-reducing circuit 120 are both high level signals. When the mobile terminal is in a power-on state, the first enable signal receiving terminal EN1 receives a high level signal, the first voltage reduction circuit 110 works normally, the output prompt terminal PG outputs a high level signal, the control terminal G of the N-type transistor receives the high level signal, the N-type transistor is turned on, the output terminal D is pulled down to the ground, i.e., a low level signal is output, the second enable signal receiving terminal EN2 receives the low level signal, and the second voltage reduction circuit 120 does not work; when the mobile terminal is in a power-off state, the first enable signal receiving terminal EN1 receives a low level signal, the first voltage reduction circuit 110 does not work, the output prompt terminal PG outputs a low level signal, the control terminal G of the N-type transistor receives the low level signal, the N-type transistor is turned off, the output terminal D is pulled up to a high level by the pull-up resistor R, that is, a high level signal is output, the second enable signal receiving terminal EN2 receives the high level signal, and the second voltage reduction circuit 120 works.
Optionally, with continued reference to fig. 1, the first voltage-dropping circuit 110 further includes a first voltage-receiving terminal VIN; the first voltage receiving terminal VIN and the second voltage receiving terminal VCC are both connected to the battery.
Specifically, no matter the mobile terminal is in the power-on state or the power-off state, the battery always provides the input voltage to the first voltage receiving terminal VIN and the second voltage receiving terminal VCC, and when the first voltage-reducing circuit 110 or the second voltage-reducing circuit 120 is in the working state, the battery input voltage is reduced and converted into the output voltage with lower voltage.
Optionally, with continued reference to fig. 1, the buck module 100 further includes a first capacitor C1 and a first resistor R1; a first end of the first capacitor C1 is connected to the output end of the battery, the first voltage receiving terminal VIN and the second voltage receiving terminal VCC, respectively, and a second end of the first capacitor C1 is grounded; a first end of the first resistor R1 is connected to the first enable signal receiving terminal EN1 and the control module 140, respectively, and a second end of the first resistor R1 is grounded.
Specifically, the output voltage of the battery passes through the first capacitor C1, and then the interference signal is filtered, and the filtered output voltage is input to the first voltage receiving terminal VIN and the second voltage receiving terminal VCC through the first capacitor C1; the output power of the first voltage-reducing circuit 110 can be adjusted by adjusting the resistance of the first resistor R1.
Optionally, the quiescent operating current of the second voltage-reducing circuit is less than 100 uA. Specifically, when the mobile terminal is in a shutdown state, the second voltage reduction circuit works, that is, the quiescent current of the second voltage reduction circuit directly affects the shutdown power consumption of the mobile terminal, in this embodiment of the present application, the quiescent operating current of the second voltage reduction circuit is smaller than 100uA, and the requirements of the client on reducing the shutdown power consumption and improving the shutdown standby time can be met.
Optionally, with continued reference to fig. 1, the first voltage-dropping circuit 110 further includes an output voltage feedback terminal FB; the buck module 100 further includes a second resistor R2 and a third resistor R3; the output voltage feedback terminal FB is connected to the first end of the second resistor R2 and the first end of the third resistor R3, respectively, the second end of the second resistor R2 is grounded, and the second end of the third resistor R3 is connected to the first voltage output terminal SW.
Specifically, by adjusting the resistance values of the second resistor R2 and the third resistor R3, the voltage value of the output voltage of the first voltage output terminal SW can be adjusted, and therefore, the requirements of users for different output voltages can be met.
Optionally, with continued reference to fig. 1, the first voltage-reducing circuit 110 further includes a bootstrap capacitor terminal BST; the buck module 100 further includes a second capacitor C2 and a fourth resistor R4; the bootstrap capacitor terminal BST is connected to the first terminal of the fourth resistor R4, the second terminal of the fourth resistor R4 is connected to the first terminal of the second capacitor C2, and the second terminal of the second capacitor C2 is connected to the first voltage output terminal SW.
Specifically, the second capacitor C2 is connected to the first voltage output terminal SW and the bootstrap capacitor terminal BST pin to form a floating voltage to drive the switch tube at the upper end of the first voltage reduction circuit 110, and a fourth resistor R4 may be connected in series to one end of the second capacitor C2 to reduce the peak value of the output voltage of the first voltage output terminal SW.
Optionally, with continued reference to fig. 1, the buck module 100 further includes an inductor L, a third capacitor C3, a fourth capacitor C4, a first diode D1, and a second diode D2; a first end of the inductor L is connected with the first voltage output terminal SW, a second end of the inductor L is respectively connected with a first end of the third capacitor C3 and the anode of the first diode D1, a second end of the third capacitor C3 is grounded, and the cathode of the first diode D1 is connected with the electricity utilization module; a first end of the fourth capacitor C4 is connected to the second voltage output terminal VOUT and the anode of the second diode D2, respectively, a second end of the fourth capacitor C4 is grounded, and the cathode of the second diode D2 is connected to the power module.
Specifically, the inductor L and the third capacitor C3 constitute an LC filter circuit, which is used for filtering interference and clutter signals in the output voltage of the first voltage output terminal SW, and ensuring the stability of the output voltage; the fourth capacitor C4 is used for filtering out the interference signal in the output voltage of the second voltage output terminal VOUT. The first diode D1 and the second diode D2 ensure the directionality of the current, prevent the current from flowing back to the first voltage-reducing circuit 110 and the second voltage-reducing circuit 120, and protect the first voltage-reducing circuit 110 and the second voltage-reducing circuit 120.
Optionally, with continued reference to fig. 1, the first voltage-dropping circuit 110 further includes first ground terminals AGND and PGND, the second voltage-dropping circuit 120 further includes a second ground terminal GND, and both the first ground terminals AGND and PGND and the second ground terminal GND are grounded.
Based on the same inventive concept, the embodiment of the utility model provides a mobile device is still provided, including the arbitrary step-down module that provides in the above-mentioned application embodiment.
Fig. 2 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention. As shown in fig. 2, the mobile terminal 200 includes a voltage step-down module 100, a power supply 210, and a power consumption module 220, wherein the voltage step-down module 100 is serially disposed between the power supply 210 and the power consumption module 220.
Specifically, the output terminal of the power supply 210 is connected to the input terminal of the voltage-reducing module 100, and the output terminal of the voltage-reducing module 100 is connected to the power-consuming module 220. The voltage-reducing module 100 is configured to reduce the output voltage of the power supply 210, and output the reduced output voltage to the power consumption module 220, so as to supply power to the power consumption module 220. The embodiment of the utility model provides a mobile terminal 200 possesses the beneficial effect that voltage reduction module 100 had in above-mentioned embodiment, and this is no longer repeated. In a specific implementation, the mobile terminal 200 may be a mobile phone, a tablet computer, a notebook computer, and the like, which is not particularly limited in the embodiment of the present invention.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A voltage reduction module is arranged between a battery and an electricity utilization module of a mobile terminal in series, and is characterized by comprising a first voltage reduction circuit, a second voltage reduction circuit and a switch control circuit;
the first voltage reduction circuit comprises a first voltage output terminal and an output prompt terminal;
the second voltage reduction circuit comprises a second voltage receiving terminal, a second voltage output terminal, a second enable signal receiving terminal and a pull-up resistor, wherein a first end of the pull-up resistor is connected with the second voltage receiving terminal, and a second end of the pull-up resistor is connected with the second enable signal receiving terminal;
the switch control circuit comprises an input end, an output end and a control end, wherein the input end is grounded, the output end is connected with the second enabling signal receiving terminal, and the control end is connected with the output prompting terminal;
the output prompt terminal is used for outputting a first control signal to the control end when the first voltage reduction circuit works, controlling the second enabling signal receiving terminal to receive a second non-enabling signal and controlling the second voltage reduction circuit to stop working; the first voltage reduction circuit is used for outputting a first control signal to the control end when the first voltage reduction circuit stops working, controlling the first enable signal receiving terminal to receive a first enable signal and controlling the first voltage reduction circuit to be conducted;
wherein the output voltage of the first voltage output terminal is greater than the output voltage of the second voltage output terminal, and the quiescent operating current of the first step-down circuit is greater than the quiescent operating current of the second step-down circuit.
2. The voltage reducing module of claim 1, wherein the mobile terminal further comprises a controller; the first voltage-reducing circuit further comprises a first enable signal receiving terminal; the first enable signal receiving terminal is connected with the controller; the controller is used for sending a first enabling signal or a first non-enabling signal;
the first enabling signal receiving terminal is used for receiving the first enabling signal and controlling the first voltage reduction circuit to work when the mobile terminal is started; and the first voltage reduction circuit is also used for receiving the first non-enabling signal and controlling the first voltage reduction circuit to stop working when the mobile terminal is powered off.
3. The buck module according to claim 2, wherein the first enable signal is a high-level signal and the first disable signal is a low-level signal;
the second enable signal is a high level signal, and the second disable signal is a low level signal;
the switch control circuit is an N-type transistor.
4. The buck module of claim 2, wherein the first buck circuit further includes a first voltage receiving terminal;
the first voltage receiving terminal and the second voltage receiving terminal are both connected to the battery.
5. The buck module according to claim 4, further comprising a first capacitor and a first resistor;
a first end of the first capacitor is connected with an output end of the battery, the first voltage receiving terminal and the second voltage receiving terminal respectively, and a second end of the first capacitor is grounded; the first end of the first resistor is connected with the first enable signal receiving terminal and the controller respectively, and the second end of the first resistor is grounded.
6. The buck module according to claim 1, wherein the second buck circuit has a quiescent operating current of less than 100 uA.
7. The buck module of claim 1, wherein the first buck circuit further includes an output voltage feedback terminal; the voltage reduction module further comprises a second resistor and a third resistor;
the output voltage feedback terminal is respectively connected with the first end of the second resistor and the first end of the third resistor, the second end of the second resistor is grounded, and the second end of the third resistor is connected with the first voltage output terminal.
8. The buck module of claim 1, wherein the first buck circuit further comprises a bootstrap capacitor terminal; the voltage reduction module further comprises a second capacitor and a fourth resistor;
the bootstrap capacitor terminal is connected to a first end of the fourth resistor, a second end of the fourth resistor is connected to a first end of the second capacitor, and a second end of the second capacitor is connected to the first voltage output terminal.
9. The buck module according to claim 1, further comprising an inductor, a third capacitor, a fourth capacitor, a first diode, and a second diode;
the first end of the inductor is connected with the first voltage output terminal, the second end of the inductor is respectively connected with the first end of the third capacitor and the anode of the first diode, the second end of the third capacitor is grounded, and the cathode of the first diode is connected with the electricity utilization module; the first end of the fourth capacitor is connected with the second voltage output terminal and the anode of the second diode respectively, the second end of the fourth capacitor is grounded, and the cathode of the second diode is connected with the power utilization module.
10. A mobile terminal, comprising the voltage-reducing module of any one of claims 1-9, and further comprising a power supply and a power-consuming module, wherein the voltage-reducing module is serially disposed between the power supply and the power-consuming module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020465904.2U CN211701852U (en) | 2020-04-02 | 2020-04-02 | Voltage reduction module and mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020465904.2U CN211701852U (en) | 2020-04-02 | 2020-04-02 | Voltage reduction module and mobile terminal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114363728A (en) * | 2021-12-30 | 2022-04-15 | 锐捷网络股份有限公司 | Electronic equipment and method for preventing current from flowing backwards |
| CN116742954A (en) * | 2022-09-29 | 2023-09-12 | 荣耀终端有限公司 | Power supply switching circuit and electronic equipment |
-
2020
- 2020-04-02 CN CN202020465904.2U patent/CN211701852U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114363728A (en) * | 2021-12-30 | 2022-04-15 | 锐捷网络股份有限公司 | Electronic equipment and method for preventing current from flowing backwards |
| CN116742954A (en) * | 2022-09-29 | 2023-09-12 | 荣耀终端有限公司 | Power supply switching circuit and electronic equipment |
| WO2024067031A1 (en) * | 2022-09-29 | 2024-04-04 | 荣耀终端有限公司 | Power switching circuit and electronic device |
| CN116742954B (en) * | 2022-09-29 | 2024-08-30 | 荣耀终端有限公司 | Power supply switching circuit and electronic equipment |
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