CN218805661U - Power management circuit, chip and vehicle - Google Patents
Power management circuit, chip and vehicle Download PDFInfo
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- CN218805661U CN218805661U CN202223153229.8U CN202223153229U CN218805661U CN 218805661 U CN218805661 U CN 218805661U CN 202223153229 U CN202223153229 U CN 202223153229U CN 218805661 U CN218805661 U CN 218805661U
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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
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The present disclosure relates to a power management circuit, chip and vehicle, the power management circuit includes: the driving circuit comprises a first voltage conversion module, a second voltage conversion module, a plurality of driving modules and a plurality of switch modules; each driving module comprises a driving enabling end; each driving module corresponds to each switch module one by one; the output end of the driving module is electrically connected with the control end of the corresponding switch module; the input end of each switch module is electrically connected with the output end of the first voltage conversion module; the output end of the switch module is electrically connected with a corresponding load; the first voltage conversion module is used for converting the power supply voltage input by the voltage input end into a first voltage and providing the first voltage to the input end of each switch module; the second voltage conversion module is used for converting the power supply voltage input by the voltage input end into a second voltage and providing the second voltage to the input end of each driving module. This openly has realized that every power rail can the independent control turn-on or turn-off, has reduced circuit area occupied simultaneously, has reduced the circuit cost.
Description
Technical Field
The utility model relates to a new energy automobile technical field especially relates to a power management circuit, chip and vehicle.
Background
In the design of the vehicle-mounted terminal, a plurality of chips often need the same working voltage, and a power rail providing the working voltage needs to satisfy three requirements: each power rail can be independently controlled to be switched on or switched off; the power supply rail voltage requirement has small fluctuation; the power rail footprint is as small as possible.
In the existing power rail schemes, an independent power converter is adopted for each chip power rail, and each path is an independent power supply, so that the voltage fluctuation is small and independently controllable, but the defects of high cost and large occupied area are overcome; another is to use a power converter and a plurality of load switches, each of which usually needs a charge pump for driving, but the cost is high.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the present disclosure provides a power management circuit, a chip and a vehicle, so as to reduce an occupied area and reduce cost under independent and stable power supply control of a plurality of loads.
The present disclosure provides a power management circuit, comprising: the device comprises a first voltage conversion module, a second voltage conversion module, a plurality of driving modules and a plurality of switch modules;
the input end of the first voltage conversion module and the input end of the second voltage conversion module are both electrically connected with a voltage input end; the enabling end of the first voltage conversion module and the enabling end of the second voltage conversion module are both electrically connected with the power supply enabling end; the input end of each driving module is electrically connected with the output end of the second voltage conversion module;
each driving module comprises a driving enabling end; each driving module corresponds to each switch module one by one; the output end of the driving module is electrically connected with the control end of the corresponding switch module; the input end of each switch module is electrically connected with the output end of the first voltage conversion module; the output end of the switch module is electrically connected with a corresponding load;
the first voltage conversion module is used for converting the power supply voltage input by the voltage input end into a first voltage and providing the first voltage to the input end of each switch module; the second voltage conversion module is used for converting the power supply voltage input by the voltage input end into a second voltage and providing the second voltage to the input end of each driving module.
Optionally, the driving module includes a driving switch unit, a first switch unit, and a second switch unit;
the control end of the driving switch unit is electrically connected with the driving enabling end of the driving module; the first end of the driving switch unit is electrically connected with the output end of the second voltage conversion module; the first end of the driving switch unit, the control end of the first switch unit, the first end of the first switch unit and the control end of the second switch unit are electrically connected; the second end of the driving switch unit and the second end of the second switch unit are grounded; the second end of the first switch unit and the first end of the second switch unit are both electrically connected with the output end of the driving module;
a drive enabling end of the drive module receives an effective enabling signal, the drive switch unit is connected with the first switch unit, and the second switch unit is disconnected; the drive enabling end of the drive module receives an invalid enabling signal, the drive switch unit and the first switch unit are turned off, and the second switch unit is turned on.
Optionally, the driving module further includes a pull-up resistor, a pull-down resistor, and a current-limiting resistor;
the output end of the second voltage conversion module is electrically connected with the first end of the driving switch unit through the pull-up resistor; the output end of the second voltage conversion module is electrically connected with the first end of the first switch unit through a current-limiting resistor; the output end of the driving module is grounded through the pull-down resistor.
Optionally, the driving switch unit includes a first NMOS transistor; the first switch unit comprises a first PMOS tube; the second switch unit comprises a second NMOS tube;
the grid electrode of the first NMOS tube is electrically connected with the drive enabling end of the drive module; the first pole of the first NMOS tube, the grid electrode of the first PMOS tube, the first pole of the first PMOS tube and the grid electrode of the second NMOS tube are electrically connected; the second pole of the first NMOS tube and the second pole of the second NMOS tube are grounded; the second pole of the first PMOS tube and the first pole of the second NMOS tube are both electrically connected with the output end of the driving module.
Optionally, the switch module includes a power switch unit; the control end of the power switch unit is electrically connected with the output end of the driving module; the first end of the power switch unit is electrically connected with the output end of the first voltage conversion module; and the second end of the power switch unit is used for being electrically connected with a corresponding load.
Optionally, the power switch unit includes a third NMOS transistor; the grid electrode of the third NMOS tube is electrically connected with the output end of the driving module; the first pole of the third NMOS tube is electrically connected with the output end of the first voltage conversion module; the second pole of the third NMOS tube is used for being electrically connected with a corresponding load;
wherein the second voltage is greater than the first voltage.
Optionally, the first voltage conversion module includes a power converter.
Optionally, the second voltage conversion module includes a charge pump.
The present disclosure also provides a power management chip including the power management circuit of any one of the above.
The present disclosure also provides a vehicle including the power management circuit of any one of the above.
Compared with the prior art, the technical scheme provided by the disclosure has the following advantages:
the present disclosure provides a power management circuit, comprising: the driving circuit comprises a first voltage conversion module, a second voltage conversion module, a plurality of driving modules and a plurality of switch modules; the input end of the first voltage conversion module and the input end of the second voltage conversion module are both electrically connected with the voltage input end; the enabling end of the first voltage conversion module and the enabling end of the second voltage conversion module are both electrically connected with the power supply enabling end; the input end of each driving module is electrically connected with the output end of the second voltage conversion module; each driving module comprises a driving enabling end; each driving module corresponds to each switch module one by one; the output end of the driving module is electrically connected with the control end of the corresponding switch module; the input end of each switch module is electrically connected with the output end of the first voltage conversion module; the output end of the switch module is electrically connected with a corresponding load; the first voltage conversion module is used for converting the power supply voltage input by the voltage input end into a first voltage and providing the first voltage to the input end of each switch module; the second voltage conversion module is used for converting the power supply voltage input by the voltage input end into a second voltage and providing the second voltage to the input end of each driving module. The power management circuit supplies power to the plurality of switch modules through the first voltage conversion module, supplies power to the plurality of driving modules through the second voltage module, controls the on or off of the first voltage conversion module and the second voltage conversion module through the same power enable end, and controls the on or off of each switch module through the corresponding driving module. Because each load is controlled by the corresponding driving module and the switch module, the power supply of each load can be independently controlled. In addition, each driving module and each switch module can be driven by one first voltage conversion module and one second voltage conversion module, so that the number of required devices is small, the occupied area of a circuit is reduced, and the cost can be reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the embodiments or technical solutions in the prior art description will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a power management circuit according to an embodiment of the present disclosure;
fig. 2 is a circuit diagram of a driving module according to an embodiment of the disclosure;
fig. 3 is a circuit diagram of another driving module provided in the embodiment of the present disclosure;
fig. 4 is a circuit diagram of another driving module provided in the embodiment of the present disclosure;
fig. 5 is a circuit diagram of a switch module according to an embodiment of the disclosure;
fig. 6 is a circuit diagram of another switch module according to an embodiment of the disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
Fig. 1 is a schematic structural diagram of a power management circuit according to an embodiment of the present disclosure, and as shown in fig. 1, the power management circuit includes: a first voltage conversion module 10, a second voltage conversion module 20, a plurality of driving modules 30, and a plurality of switching modules 40.
The input terminal 101 of the first voltage conversion module 10 and the input terminal 201 of the second voltage conversion module 20 are both electrically connected to the voltage input terminal Vin. The enable terminal 102 of the first voltage conversion module 10 and the enable terminal 202 of the second voltage conversion module 20 are both electrically connected to the power supply enable terminal En. The input terminal 301 of each driving module 30 is electrically connected to the output terminal 203 of the second voltage converting module 20.
Each drive module 30 includes a drive enable terminal 302; each driving module 30 corresponds to each switch module 40 one by one; the output end 303 of the driving module 30 is electrically connected with the control end 401 of the corresponding switch module 40; the input end 402 of each switch module 40 is electrically connected with the output end 103 of the first voltage conversion module 10; the output 403 of the switching module 40 is used to electrically connect with a corresponding load 50.
The first voltage conversion module 10 is configured to convert a power voltage input from a voltage input terminal Vin into a first voltage, and provide the first voltage to an input terminal 402 of each switch module 40. The second voltage conversion module 20 is configured to convert the power voltage input by the voltage input terminal Vin into a second voltage, and provide the second voltage to the input terminal 301 of each driving module 30.
The following exemplarily presents the circuit implementation principle of the embodiments of the present disclosure:
the input end 101 of the first voltage conversion module 10 and the input end 201 of the second voltage conversion module 20 are both electrically connected to a voltage input end Vin, and an external power supply supplies power to the first voltage conversion module 10 and the second voltage conversion module 20 through the voltage input end Vin.
Since the enable terminal 102 of the first voltage conversion module 10 and the enable terminal 202 of the second voltage conversion module 20 are both electrically connected to the power enable terminal En, when the power enable terminal En receives a valid enable signal, the first voltage conversion module 10 and the second voltage conversion module 20 start to operate, and the first voltage conversion module 10 converts the power voltage input by the voltage input terminal Vin into a first voltage and provides the first voltage to the input terminal 402 of each switch module 40. The second voltage conversion module 20 converts the power voltage input from the voltage input terminal Vin into a second voltage, and provides the second voltage to the input terminal 301 of each driving module 30.
When the driving enable end of a certain driving module 30 receives a valid enable signal, the driving module 30 may drive the corresponding electrically connected switching module to turn on, so that the switching module supplies power to the electrically connected load.
See fig. 1 for an exemplary arrangement of 5 driver modules and 5 switch modules. Each driving module 30 corresponds to each switch module 40 in the power management circuit, and accordingly, power supply to 5 loads (load 51, load 52, load 53, load 54, and load 55, respectively) can be independently controlled. The driving modules 31 correspond to the switch modules 41, 32 correspond to the switch modules 42, 33 correspond to the switch modules 43, 34 correspond to the switch modules 44, and 35 correspond to the switch modules 45. Each driving module 30 includes a driving enable terminal 302, and the output terminal 303 of each driving module 30 is electrically connected to the control terminal 401 of the corresponding switch module 40. Taking the driving module 31 as an example, after the driving enable terminal 302 of the driving module 31 receives the valid enable signal, the driving module 31 starts to operate, and the output terminal 303 of the driving module 31 outputs a control signal to the control terminal 401 of the corresponding switch module 41 to control the switch module 41 to be turned on. When the switch module 41 is turned on, the output 403 of the switch module 41 supplies power to the load 50 to which it is connected. It should be noted that, the above description is given by taking the example of enabling the driving module 31 and the switching module 41 to control the power supply to the load 51, and the other driving modules and the switching module to control the power supply to the load are similar to the above, and are not described again in this disclosure.
The power management circuit provided by the disclosure receives an effective enable signal through the power enable end, enables the first voltage conversion module and the second voltage conversion module, converts the power voltage input by the voltage input end into the first voltage and provides the first voltage to the input end of each switch module, and converts the power voltage input by the voltage input end into the second voltage by the second voltage conversion module and provides the second voltage to the input end of each driving module. When the drive enabling end of each drive module receives an effective enabling signal, each drive module can control the switch module which is correspondingly connected to be started so as to supply power to the load which is electrically connected with the switch module. Because the power management circuit of the embodiment of the disclosure only uses one first voltage conversion module and one second voltage conversion module, the number of components in the power management circuit is reduced, and the occupied area of the circuit can be reduced. And because the number of components in the power management circuit is reduced, the circuit cost can be reduced. Because each load can be independently controlled by the corresponding driving module and the corresponding switch module, the embodiment of the disclosure can ensure that the power rails of the loads are independently controlled.
In some embodiments, referring to fig. 2, the driving module 30 includes a driving switching unit 310, a first switching unit 320, and a second switching unit 330.
The control terminal of the driving switch unit 310 is electrically connected to the driving enable terminal 302 of the driving module 30; a first terminal of the driving switch unit 310 is electrically connected to the output terminal 203 of the second voltage conversion module 20. The first end of the driving switch unit 310, the control end of the first switch unit 320, the first end of the first switch unit 320 and the control end of the second switch unit 330 are electrically connected; the second terminal of the driving switch unit 310 and the second terminal of the second switch unit 330 are grounded; the second end of the first switch unit 320 and the first end of the second switch unit 330 are electrically connected to the output end 303 of the driving module 30.
When the driving enable terminal 302 of the driving module 30 receives the valid enable signal, the driving switch unit 310 and the first switch unit 320 are turned on, and the second switch unit 330 is turned off; the driving enable terminal 302 of the driving module 30 receives the disable enable signal, the driving switch unit 310 and the first switch unit 320 are turned off, and the second switch unit 330 is turned on.
The control principle is as follows: when the driving enable terminal 302 of the driving module 30 receives the valid enable signal, the driving switch unit 310 and the first switch unit 320 are turned on, the second switch unit 330 is turned off, the output terminal 203 of the second voltage conversion module 20 and the output terminal 303 of the driving module 30 are turned on, and the output terminal 303 of the driving module 30 can output a control signal to the correspondingly connected switch module to control the correspondingly connected switch module to be turned on. When the driving enable terminal 302 of the driving module 30 receives the disable enable signal, the driving switch unit 310 and the first switch unit 320 are turned off, the second switch unit 330 is turned on, the second terminal of the second switch unit 330 is grounded, the output terminal 303 of the driving module 30 is grounded, and the switch module to which the driving module 30 is correspondingly connected is turned off.
In some embodiments, referring to fig. 3, the driving module 30 further includes a pull-up resistor R1, a pull-down resistor R2, and a current limiting resistor R3.
The output terminal of the second voltage conversion module 20 is electrically connected to the first terminal of the driving switch unit 310 through a pull-up resistor R1; the output end of the second voltage conversion module 20 is electrically connected to the first end of the first switch unit 320 through a current-limiting resistor R3; the output terminal of the driving module 20 is grounded through a pull-down resistor R2.
The control principle is as follows, when the driving enable terminal 302 of the driving module 30 receives an effective enable signal, the driving switch unit 310 and the first switch unit 320 are turned on, the second switch unit 330 is turned off, the output terminal 203 of the second voltage conversion module 20 and the output terminal 303 of the driving module 30 are turned on, and the output terminal 303 of the driving module 30 can output a control signal to the correspondingly connected switch module to control the correspondingly connected switch module to be turned on. When the driving enable terminal 302 of the driving module 30 receives the disable enable signal, the driving switch unit 310 and the first switch unit 320 are turned off, the second switch unit 330 is turned on, the second terminal of the second switch unit 330 is grounded, the output terminal 303 of the driving module 30 is grounded, and the switch module to which the driving module 30 is correspondingly connected is turned off.
In some embodiments, referring to fig. 4, the driving switching unit 310 includes a first NMOS transistor Q1; the first switching unit 320 includes a first PMOS transistor Q2; the second switching unit 330 includes a second NMOS transistor Q3.
The gate of the first NMOS transistor Q1 is electrically connected to the driving enable terminal 302 of the driving module 30; the first pole of the first NMOS transistor Q1, the grid electrode of the first PMOS transistor Q2, the first pole of the first PMOS transistor Q2 and the grid electrode of the second NMOS transistor Q3 are electrically connected; the second pole of the first NMOS transistor Q1 and the second pole of the second NMOS transistor Q3 are grounded; the second pole of the first PMOS transistor Q2 and the first pole of the second NMOS transistor Q3 are both electrically connected to the output terminal 303 of the driving module 30.
The control principle is as follows, when the driving enable end 302 of the driving module 30 receives an effective enable signal (a high level voltage signal), the first NMOS transistor Q1 and the first PMOS transistor Q2 are turned on, the second NMOS transistor Q3 is turned off, at this time, the output end 203 of the second voltage conversion module 20 is turned on with the output end 303 of the driving module 30, and the driving module 30 outputs a high level voltage signal to control the correspondingly connected switching module to be turned on. When the driving enable terminal 302 of the driving module 30 receives an invalid enable signal (low level voltage signal), the first NMOS transistor Q1 and the first PMOS transistor Q2 are turned off, the second NMOS transistor Q3 is turned on, and since the output terminal 303 of the driving module 30 is grounded, the driving module 30 outputs a low level voltage signal, and the switch module correspondingly connected to the driving module 30 is turned off.
In some embodiments, referring to fig. 5, the switch module 40 includes a power switch unit 410; the control terminal 401 of the power switch unit 410 is electrically connected with the output terminal 303 of the driving module 30; the first terminal 402 of the power switching unit 410 is electrically connected with the output terminal 103 of the first voltage conversion module 10; the second terminal 403 of the power switch unit 410 is used to electrically connect with the corresponding load 50. The control terminal 401 of the power switch unit 410 may be controlled to be turned on or off according to the received signal of the output terminal 303 of the driving module 30.
In some embodiments, referring to fig. 6, the power switching unit 410 includes a third NMOS transistor Q4; the gate of the third NMOS transistor Q4 is electrically connected to the output terminal 303 of the driving module 30; the first pole of the third NMOS transistor Q4 is electrically connected to the output terminal 103 of the first voltage conversion module 10; the second pole of the third NMOS transistor Q4 is used for electrical connection with the corresponding load 50;
wherein the second voltage is greater than the first voltage.
The control principle is that when the gate of the third NMOS transistor Q4 receives the high-level voltage signal from the output terminal 303 of the driving module 30, the third NMOS transistor Q4 is turned on, at this time, the corresponding load 50 connected to the second pole of the third NMOS transistor Q4 is equivalent to the output terminal 103 of the first voltage converting module 10 directly connected to the first pole of the third NMOS transistor Q4, and at this time, the load 50 outputs the first voltage output by the output terminal 103 of the first voltage converting module 10. When the gate of the third NMOS transistor Q4 receives the low-level voltage signal transmitted from the output terminal 303 of the driving module 30, the third NMOS transistor Q4 is turned off. It should be noted that, if the power switch unit 301 is an NMOS transistor, the second voltage is greater than the first voltage, so that the gate voltage of the NMOS transistor is greater than the source voltage, and the NMOS transistor is turned on.
In some embodiments, the first voltage conversion module 10 comprises a power converter.
Optionally, the first voltage conversion module 10 may be a power converter, and the power converter is specifically configured to convert a power supply voltage input by the voltage input terminal into a first voltage and supply power to each switch module 40. Because only one power converter in the power management circuit is used for supplying power to each switch module 40, the occupied area of the circuit is reduced, and the cost is reduced.
In some embodiments, the second voltage conversion module 20 comprises a charge pump.
Alternatively, the first voltage conversion module 20 may be a charge pump, and the charge pump is specifically configured to convert a power supply voltage input by the voltage input terminal into a second voltage and supply power to each driving module 30. Because only one charge pump in the power management circuit is used for supplying power to each driving module 30, the occupied area of the circuit is reduced, and the cost is reduced.
The first voltage conversion module may also be a BOOST circuit, and the BOOST circuit is specifically configured to convert a power supply voltage input by the voltage input terminal into a second voltage, and supply power to each of the driving modules 30. Because only one BOOST circuit in the power management circuit is used for supplying power to each driving module 30, the occupied area of the circuit is reduced, and the cost is reduced.
The embodiment of the present disclosure further provides a power management chip, where the power management chip includes the power management circuit in any one of the above embodiments.
The beneficial effects of the power management chip of the embodiment of the present disclosure are the same as those of the embodiment described above, please refer to the above for understanding.
The embodiment of the disclosure also provides a vehicle, which comprises the power management circuit in any one of the above embodiments.
The advantageous effects of the vehicle of the embodiment of the present disclosure are the same as those of the embodiment described above, please refer to the above.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A power management circuit, comprising:
the driving circuit comprises a first voltage conversion module, a second voltage conversion module, a plurality of driving modules and a plurality of switch modules;
the input end of the first voltage conversion module and the input end of the second voltage conversion module are both electrically connected with a voltage input end; the enabling end of the first voltage conversion module and the enabling end of the second voltage conversion module are both electrically connected with the power supply enabling end; the input end of each driving module is electrically connected with the output end of the second voltage conversion module;
each driving module comprises a driving enabling end; each driving module corresponds to each switch module one by one; the output end of the driving module is electrically connected with the control end of the corresponding switch module; the input end of each switch module is electrically connected with the output end of the first voltage conversion module; the output end of the switch module is electrically connected with a corresponding load;
the first voltage conversion module is used for converting the power supply voltage input by the voltage input end into a first voltage and providing the first voltage to the input end of each switch module; the second voltage conversion module is used for converting the power supply voltage input by the voltage input end into a second voltage and providing the second voltage to the input end of each driving module.
2. The power management circuit of claim 1, wherein the driving module comprises a driving switch unit, a first switch unit and a second switch unit;
the control end of the driving switch unit is electrically connected with the driving enabling end of the driving module; the first end of the driving switch unit is electrically connected with the output end of the second voltage conversion module; the first end of the driving switch unit, the control end of the first switch unit, the first end of the first switch unit and the control end of the second switch unit are electrically connected; the second end of the driving switch unit and the second end of the second switch unit are grounded; the second end of the first switch unit and the first end of the second switch unit are both electrically connected with the output end of the driving module;
a drive enabling end of the drive module receives an effective enabling signal, the drive switch unit is connected with the first switch unit, and the second switch unit is disconnected; the drive enabling end of the drive module receives an invalid enabling signal, the drive switch unit and the first switch unit are turned off, and the second switch unit is turned on.
3. The power management circuit of claim 2, wherein the driver module further comprises a pull-up resistor, a pull-down resistor, and a current limiting resistor;
the output end of the second voltage conversion module is electrically connected with the first end of the driving switch unit through the pull-up resistor; the output end of the second voltage conversion module is electrically connected with the first end of the first switch unit through a current-limiting resistor; the output end of the driving module is grounded through the pull-down resistor.
4. The power management circuit of claim 2, wherein the driving switch unit comprises a first NMOS transistor; the first switch unit comprises a first PMOS tube; the second switch unit comprises a second NMOS tube;
the grid electrode of the first NMOS tube is electrically connected with the drive enabling end of the drive module; the first pole of the first NMOS tube, the grid electrode of the first PMOS tube, the first pole of the first PMOS tube and the grid electrode of the second NMOS tube are electrically connected; the second pole of the first NMOS tube and the second pole of the second NMOS tube are grounded; the second pole of the first PMOS tube and the first pole of the second NMOS tube are both electrically connected with the output end of the driving module.
5. The power management circuit of claim 1, wherein the switch module comprises a power switch unit; the control end of the power switch unit is electrically connected with the output end of the driving module; the first end of the power switch unit is electrically connected with the output end of the first voltage conversion module; and the second end of the power switch unit is used for being electrically connected with a corresponding load.
6. The power management circuit of claim 5, wherein the power switch unit comprises a third NMOS transistor; the grid electrode of the third NMOS tube is electrically connected with the output end of the driving module; the first pole of the third NMOS tube is electrically connected with the output end of the first voltage conversion module; the second pole of the third NMOS tube is used for being electrically connected with a corresponding load;
wherein the second voltage is greater than the first voltage.
7. The power management circuit of claim 1, wherein the first voltage conversion module comprises a power converter.
8. The power management circuit of claim 1, wherein the second voltage conversion module comprises a charge pump.
9. A power management chip comprising the power management circuit of any one of claims 1-8.
10. A vehicle comprising a power management circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202223153229.8U CN218805661U (en) | 2022-11-24 | 2022-11-24 | Power management circuit, chip and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223153229.8U CN218805661U (en) | 2022-11-24 | 2022-11-24 | Power management circuit, chip and vehicle |
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| CN218805661U true CN218805661U (en) | 2023-04-07 |
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| CN202223153229.8U Active CN218805661U (en) | 2022-11-24 | 2022-11-24 | Power management circuit, chip and vehicle |
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