Drive and electronic equipment

Abstract

The present disclosure relates to a driving device and an electronic device, wherein the driving device comprises a loop control module, a driving module, a detection module, a switch module and a current generating module, wherein the output end of the loop control module is electrically connected to a voltage of a first end of the driving module for obtaining loop control; the driving module is used to output a driving voltage; the detection module is used to output a control signal according to the driving voltage to control the conduction state of the switch module; the switch module is used to receive a starting current output by a current generating module, and output the starting current to an input end of the driving module when conducting, so that the driving module outputs a driving voltage. The embodiment of the present disclosure controls the conduction state of the switch module by detecting the magnitude of the driving voltage output by the driving module, so that the switch module can output the starting current output by the current generating module to the input end of the driving module when conducting, so as to charge the input end of the driving module, so that the driving module can quickly output a stable driving voltage.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power supply, and in particular to a driving device and an electronic device. Background Art

[0002] An IP (Intellectual Property) module is a pre-designed or even verified integrated circuit, device or component with a certain function, which is selected for assembly or integration by chip designers. Many IP modules require a special startup circuit to start up in order to enter the working state. For example, the output voltage of the bandgap reference source does not change with changes in temperature, process, power supply voltage and load, and is an important part of integrated circuit design. However, in order to start the bandgap reference source, a fast startup circuit needs to be designed for it to improve the stability of IP modules such as the bandgap reference circuit. However, the startup circuit in the related art cannot quickly output a stable startup voltage, thereby failing to achieve stable and efficient operation of the IP module. Summary of the invention

[0003] In view of this, the present disclosure proposes a driving device and an electronic device to quickly output a stable driving voltage to drive the IP module to work stably and efficiently.

[0004] According to one aspect of the present disclosure, a driving device is provided, the driving device comprising a loop control module, a driving module, a detection module, a switch module and a current generating module, wherein:

[0005] The output end of the loop control module is electrically connected to the input end of the driving module, and the input end of the loop control module is electrically connected to the first end of the driving module, so as to obtain the voltage of the first end of the driving module to perform loop control;

[0006] The output end of the driving module is electrically connected to the first end of the detection module and is used to output a driving voltage, and the power supply end of the driving module is used to receive a power supply voltage;

[0007] The second end of the detection module is electrically connected to the control end of the switch module, and is used to output a control signal according to the driving voltage to control the conduction state of the switch module;

[0008] The first end of the switch module is electrically connected to the output end of the current generating module, and is used to receive the starting current output by the current generating module;

[0009] The second end of the switch module is electrically connected to the output end of the loop control module and the input end of the drive module, and is used to output the starting current to the input end of the drive module when it is turned on, so that the drive module outputs a drive voltage.

[0010] In a possible implementation, the detection module is used to:

[0011] When the driving voltage is lower than the threshold voltage, outputting a control signal to control the switch module to be turned on; or

[0012] When the driving voltage is greater than or equal to the threshold voltage, a control signal is output to control the switch module to be disconnected.

[0013] In a possible implementation manner, the detection module includes a comparator.

[0014] In a possible implementation, the loop control module includes a first operational amplifier, and the driving module includes a first transistor, a second transistor, a third transistor, a first resistor, a second resistor, and a third resistor, wherein:

[0015] The output end of the first operational amplifier is electrically connected to the control end of the first transistor, and the control end of the first transistor is the input end of the driving module.

[0016] The positive input terminal of the first operational amplifier is electrically connected to the second end of the first resistor and the first end of the second transistor, and the negative input terminal of the first operational amplifier is electrically connected to the second end of the second resistor and the first end of the third resistor.

[0017] The first end of the first transistor is used to receive a power supply voltage, and the second end of the first transistor is electrically connected to the first end of the first resistor and the first end of the second resistor.

[0018] The control terminal of the second transistor is electrically connected to the second terminal of the second transistor, the control terminal of the third transistor, the second terminal of the third transistor, and is grounded.

[0019] Wherein, any one of the first end of the second resistor, the second end of the second resistor, and the second end of the third resistor serves as the output end of the driving module.

[0020] In a possible implementation, the first transistor is a metal-oxide semiconductor field effect transistor, and the second transistor and the third transistor are triodes.

[0021] In a possible implementation manner, the driving voltage is used to drive a bandgap voltage source.

[0022] In a possible implementation, the loop control module includes a second operational amplifier, and the driving module includes a fourth transistor, a fourth resistor, and a fifth resistor, wherein:

[0023] The output end of the second operational amplifier is electrically connected to the control end of the fourth transistor, and the control end of the fourth transistor is the input end of the driving module.

[0024] The positive input terminal of the second operational amplifier is used to receive a reference voltage.

[0025] The negative input terminal of the second operational amplifier is electrically connected to the second terminal of the fourth resistor and the first terminal of the fifth resistor, and the second terminal of the fifth resistor is grounded.

[0026] The first terminal of the fourth transistor is used to receive the power supply voltage.

[0027] The second end of the fourth transistor is electrically connected to the first end of the fourth resistor,

[0028] Wherein, the first end of the fourth resistor or the second end of the fourth resistor serves as the output end of the driving module.

[0029] In a possible implementation manner, the fourth transistor is a metal-oxide semiconductor field effect transistor.

[0030] In a possible implementation manner, the driving voltage is used to drive a low voltage dropout linear regulator.

[0031] According to one aspect of the present disclosure, an electronic device is provided, and the electronic device includes the driving device.

[0032] The disclosed embodiment detects the magnitude of the driving voltage output by the driving module and generates a control signal to control the conduction state of the switch module, so that when the switch module is turned on, it can output the starting current output by the current generating module to the input end of the driving module to charge the input end of the driving module, so that the driving module can quickly output a stable driving voltage.

[0033] Further features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.

[0035] Figure 1 A schematic diagram of a driving device according to an embodiment of the present disclosure is shown.

[0036] Figure 2 A schematic diagram of a driving device according to an embodiment of the present disclosure is shown.

[0037] Figure 3A schematic diagram of a driving device according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0038] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0039] In the description of the present disclosure, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] In the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0041] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0042] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present disclosure can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present disclosure.

[0043] See also Figure 1 , Figure 1 A schematic diagram of a driving device according to an embodiment of the present disclosure is shown.

[0044] like Figure 1 As shown, the driving device includes a loop control module 10, a driving module 20, a detection module 30, a switch module 50 and a current generating module 40, wherein:

[0045] The output end of the loop control module 10 is electrically connected to the input end of the driving module 20, and the input end of the loop control module 10 is electrically connected to the first end of the driving module 20, so as to obtain the voltage of the first end of the driving module 20 for loop control;

[0046] The output end of the driving module 20 is electrically connected to the first end of the detection module 30 and is used to output the driving voltage Vout. The power supply end of the driving module 20 is used to receive the power supply voltage.

[0047] The second end of the detection module 30 is electrically connected to the control end of the switch module 50, and is used to output a control signal according to the driving voltage Vout to control the conduction state of the switch module 50;

[0048] The first end of the switch module 50 is electrically connected to the output end of the current generating module 40, and is used to receive the starting current output by the current generating module 40;

[0049] The second end of the switch module 50 is electrically connected to the output end of the loop control module 10 and the input end of the driving module 20 , and is used to output the starting current to the input end of the driving module 20 when turned on, so that the driving module 20 outputs the driving voltage Vout.

[0050] The disclosed embodiment detects the magnitude of the driving voltage output by the driving module and generates a control signal to control the conduction state of the switch module, so that when the switch module is turned on, it can output the starting current output by the current generating module to the input end of the driving module to charge the input end of the driving module, so that the driving module can quickly output a stable driving voltage.

[0051] The disclosed embodiments may be applied to electronic devices, which are also referred to as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., and are devices that provide voice and / or data connectivity to users, such as handheld devices with wireless connection functions, vehicle-mounted devices, etc. At present, some examples of terminals are: mobile phones, tablet computers, laptop computers, PDAs, mobile Internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control (Industrial Control), wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids (Smart Grid), wireless terminals in transportation safety (Transportation Safety), wireless terminals in smart cities (Smart City), wireless terminals in smart homes (Smart Home), wireless terminals in Internet of Vehicles, etc.

[0052] In a possible implementation, the detection module 30 may be used to:

[0053] When the driving voltage is lower than the threshold voltage, a control signal is output to control the switch module to be turned on.

[0054] In a possible implementation, the detection module 30 may be used to:

[0055] When the driving voltage is greater than or equal to the threshold voltage, a control signal is output to control the switch module to be disconnected.

[0056] By detecting the driving voltage through the detection module and comparing it with the threshold voltage, the switch module can be controlled to speed up the driving module to output a stable driving voltage.

[0057] In a possible implementation manner, the detection module may include a comparator.

[0058] The disclosed embodiment can utilize the magnitude of the comparator driving voltage and the threshold voltage to output a comparison result signal, and use the comparison result signal as a control signal, or obtain a control signal based on the comparison result signal to control the switch module.

[0059] The embodiment of the present disclosure does not limit the magnitude of the threshold voltage. In one example, the threshold voltage may be the same as the target driving voltage.

[0060] In a possible implementation, the loop control module may include an operational amplifier. The embodiment of the present disclosure does not limit the type and parameters of the operational amplifier, and those skilled in the art may set them as needed.

[0061] The following is an exemplary introduction to possible implementations of each module.

[0062] See also Figure 2 , Figure 2 A schematic diagram of a driving device according to an embodiment of the present disclosure is shown.

[0063] In one possible implementation, Figure 2 As shown, the loop control module may include a first operational amplifier OP1, and the driving module may include a first transistor Q1, a second transistor Q2, a third transistor Q3, a first resistor R1, a second resistor R2, and a third resistor R3, wherein:

[0064] The output end of the first operational amplifier OP1 is electrically connected to the control end of the first transistor Q1, and the control end of the first transistor Q1 is the input end of the driving module.

[0065] The positive input terminal of the first operational amplifier OP1 is electrically connected to the second end of the first resistor R1 and the first end of the second transistor Q2, and the negative input terminal of the first operational amplifier OP1 is electrically connected to the second end of the second resistor R2 and the first end of the third resistor R3, wherein the second end of the first resistor R1 serves as the first end of the driving module.

[0066] The first end of the first transistor Q1 is used to receive the power supply voltage VDD, and the second end of the first transistor Q1 is electrically connected to the first end of the first resistor R1 and the first end of the second resistor R2.

[0067] The control end of the second transistor Q2 is electrically connected to the second end of the second transistor Q2, the control end of the third transistor Q3, the second end of the third transistor Q3, and is grounded GND.

[0068] Wherein, any one of the first end of the second resistor R2, the second end of the second resistor R2, and the second end of the third resistor R3 serves as the output end of the driving module.

[0069] In one possible implementation, Figure 2As shown, the first transistor Q1 can be a metal-oxide-semiconductor field-effect transistor (MOSFET), for example, it can be NMOS, PMOS, etc., and of course it can also be an NPN transistor, PNP transistor, etc., which is not limited in the embodiments of the present disclosure.

[0070] In one example, if Figure 2 As shown, the second transistor Q2 and the third transistor Q3 may be triodes.

[0071] In a possible implementation, the switch module may include a first switch K1 , and the first switch K1 may be a transistor, a single-pole single-throw switch, a multiplexer, etc. The embodiment of the present disclosure does not limit the type of the first switch K1 .

[0072] In a possible implementation, the driving voltage Vout may be used to drive an IP module such as a bandgap voltage source.

[0073] In one example, the bandgap voltage source needs to start when the driving voltage Vout reaches the target driving voltage to output the bandgap voltage. When the driving voltage Vout is established slowly or is unstable, the bandgap voltage source cannot work normally. The driving device of the embodiment of the present disclosure can quickly generate a stable driving voltage Vout to start the bandgap voltage source, so that the bandgap voltage source can work stably.

[0074] In one example, when the detection module detects that the driving voltage Vout is less than the threshold voltage, the output control signal controls the switch module to turn on, outputs the starting current to the control terminal of the first transistor to charge it, and accelerates the conduction of the first transistor, so that the driving module can quickly generate the driving voltage; when the detection module detects that the driving voltage reaches the threshold voltage, the detection module can output a control signal to control the switch module to disconnect, so that the current generating module is disconnected from the driving module, and the starting current is turned off, so that the driving voltage Vout is decoupled from the starting current, and the discreteness of the driving voltage Vout has nothing to do with the current generating module, which can improve the stability of the driving voltage Vout generated by the driving module.

[0075] See also Figure 3 , Figure 3 A schematic diagram of a driving device according to an embodiment of the present disclosure is shown.

[0076] In one possible implementation, Figure 3 As shown, the loop control module may include a second operational amplifier OP2, and the driving module includes a fourth transistor Q4, a fourth resistor R4 and a fifth resistor R5, wherein:

[0077] The output end of the second operational amplifier OP2 is electrically connected to the control end of the fourth transistor Q4, and the control end of the fourth transistor Q4 is the input end of the driving module.

[0078] The positive input terminal of the second operational amplifier OP2 is used to receive a reference voltage Vref.

[0079] The negative input terminal of the second operational amplifier OP2 is electrically connected to the second terminal of the fourth resistor R4 and the first terminal of the fifth resistor R5. The second terminal of the fifth resistor R5 is grounded.

[0080] The first terminal of the fourth transistor Q4 is used to receive the power supply voltage VDD.

[0081] The second end of the fourth transistor Q4 is electrically connected to the first end of the fourth resistor R4.

[0082] Wherein, the first end of the fourth resistor R4 or the second end of the fourth resistor R4 serves as the output end of the driving module.

[0083] In a possible implementation, the fourth transistor Q4 may be a metal-oxide semiconductor field effect transistor, such as NMOS, PMOS, etc., and may also be an NPN transistor, PNP transistor, etc., which is not limited in the embodiments of the present disclosure.

[0084] In a possible implementation, the driving voltage is used in an IP module such as an LDO (Low Dropout Regulator).

[0085] In one example, when the reference voltage Vref has been input and is stable, the EN terminal of the second operational amplifier OP2 can be enabled by the input enable signal, the second operational amplifier OP2 enters the working state, and the entire driving device starts to enter the working state. When the detection module detects that the driving voltage Vout is less than the threshold voltage, the output control signal controls the switch module to turn on, and outputs the starting current to the control terminal of the fourth transistor to charge it, accelerate the conduction of the fourth transistor, and enable the driving module to quickly generate a driving voltage.

[0086] The embodiment of the present disclosure does not limit the method for generating the reference voltage Vref, and those skilled in the art may implement it in a desired manner as required.

[0087] In a possible implementation, Figure 2 , Figure 3As shown, the current generating module 40 can generate a starting current using the power supply voltage VDD. For example, a resistance unit can be set in the current generating module 40, and the corresponding starting current can be generated by setting the resistance value of the resistance unit. Of course, the current generating module 40 can also generate the starting current in a manner independent of the power supply voltage VDD. For example, in one possible implementation, the current generating module can include a current source to generate the starting current using the current source, or can include a voltage source and a resistor to generate the starting current using the voltage source and the resistor. Of course, the implementation method of the current generating module is not limited in the embodiments of the present disclosure, and those skilled in the art can determine the implementation method as needed.

[0088] Although the embodiments of the present disclosure are introduced by taking the bandgap voltage source and LDO as examples, it should be understood that the driving device proposed in the present disclosure can also be used as a startup circuit of other IP modules, and the embodiments of the present disclosure are not limited to this.

[0089] Through the driving device, the embodiment of the present disclosure can speed up the establishment of the driving voltage and quickly generate a stable and accurate driving voltage to drive each IP module, so that each IP module can work stably and efficiently. The above driving device is simple to implement and has the characteristics of low power consumption and low cost.

[0090] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A driving device, characterized in that: The driving device includes a loop control module, a driving module, a detection module, a switch module and a current generating module, wherein: The output end of the loop control module is electrically connected to the input end of the driving module, and the input end of the loop control module is electrically connected to the first end of the driving module, so as to obtain the voltage of the first end of the driving module to perform loop control; The output end of the driving module is electrically connected to the first end of the detection module and is used to output a driving voltage, and the power supply end of the driving module is used to receive a power supply voltage; The second end of the detection module is electrically connected to the control end of the switch module, and is used to output a control signal according to the driving voltage to control the conduction state of the switch module; The first end of the switch module is electrically connected to the output end of the current generating module, and is used to receive the starting current output by the current generating module; The second end of the switch module is electrically connected to the output end of the loop control module and the input end of the drive module, and is used to output the startup current to the input end of the drive module when it is turned on, so that the drive module outputs a drive voltage, and the drive voltage is used to drive the IP module, and the IP module includes a bandgap voltage source. The detection module is used for: When the driving voltage is lower than the threshold voltage, outputting a control signal to control the switch module to be turned on; or When the driving voltage is greater than or equal to the threshold voltage, a control signal is output to control the switch module to be disconnected.

2. The device according to claim 1, characterized in that The detection module includes a comparator.

3. The device according to claim 1, characterized in that The loop control module includes a first operational amplifier, and the driving module includes a first transistor, a second transistor, a third transistor, a first resistor, a second resistor, and a third resistor, wherein: The output end of the first operational amplifier is electrically connected to the control end of the first transistor, and the control end of the first transistor is the input end of the driving module. The positive input terminal of the first operational amplifier is electrically connected to the second end of the first resistor and the first end of the second transistor, and the negative input terminal of the first operational amplifier is electrically connected to the second end of the second resistor and the first end of the third resistor. The first end of the first transistor is used to receive a power supply voltage, and the second end of the first transistor is electrically connected to the first end of the first resistor and the first end of the second resistor. The control terminal of the second transistor is electrically connected to the second terminal of the second transistor, the control terminal of the third transistor, the second terminal of the third transistor, and is grounded. Wherein, any one of the first end of the second resistor, the second end of the second resistor, and the second end of the third resistor serves as the output end of the driving module.

4. The device according to claim 3, characterized in that The first transistor is a metal-oxide semiconductor field effect transistor, and the second transistor and the third transistor are triodes.

5. The device according to claim 3 or 4, characterized in that The driving voltage is used to drive the bandgap voltage source.

6. The device according to claim 1, characterized in that The loop control module includes a second operational amplifier, and the driving module includes a fourth transistor, a fourth resistor and a fifth resistor, wherein: The output end of the second operational amplifier is electrically connected to the control end of the fourth transistor, and the control end of the fourth transistor is the input end of the driving module. The positive input terminal of the second operational amplifier is used to receive a reference voltage. The negative input terminal of the second operational amplifier is electrically connected to the second terminal of the fourth resistor and the first terminal of the fifth resistor, and the second terminal of the fifth resistor is grounded. The first terminal of the fourth transistor is used to receive the power supply voltage. The second end of the fourth transistor is electrically connected to the first end of the fourth resistor, Wherein, the first end of the fourth resistor or the second end of the fourth resistor serves as the output end of the driving module.

7. The device according to claim 6, characterized in that The fourth transistor is a metal-oxide semiconductor field effect transistor.

8. The device according to claim 7 or 6, characterized in that The driving voltage is used to drive a low voltage drop linear regulator.

9. An electronic device, characterized in that: The electronic device comprises the driving device according to any one of claims 1-8.

Images