WO2023226971A1 - Voltage stabilizing circuit and voltage stabilizing method therefor, integrated circuit, and electronic device - Google Patents

Abstract

The present application provides a voltage stabilizing circuit and a voltage stabilizing method therefor, an integrated circuit, and an electronic device. The voltage stabilizing circuit comprises a voltage regulating circuit and a drive circuit; the drive circuit is used for outputting a drive voltage; and the voltage regulating circuit is used for charging or discharging the drive circuit on the basis of a preset voltage threshold value and the drive voltage, such that the drive voltage is stabilized within a preset voltage range. In the present application, when the load changes, that is, when a light load becomes a heavy load or a heavy load becomes a light load, the drive voltage outputted by the drive circuit changes accordingly; then the voltage regulating circuit can rapidly regulate the drive circuit, that is, rapidly charge or discharge the drive circuit on the basis of the preset voltage threshold and the current drive voltage, such that the regulated drive voltage is stabilized within a preset voltage range. In this way, a rapid response to load changes can be achieved, effectively improving the response speed of the voltage stabilizing circuit.

Description

Voltage stabilizing circuit and voltage stabilizing method, integrated circuit and electronic equipment

[Cross-reference to related applications]

This application claims priority from the Chinese application No. 202210568941.X filed on May 24, 2022, the entire content of which is hereby incorporated by reference for all purposes.

【Technical field】

The present application relates to the field of voltage stabilization technology, and in particular to a voltage stabilizing circuit and a voltage stabilizing method thereof, integrated circuits and electronic equipment.

【Background technique】

In the chip, an LDO (Low Dropout Regulator, low dropout linear regulator) is usually installed to provide a stable operating voltage for other modules in the chip through the LDO.

For the application of LDO, it is necessary to focus on the stability and response speed of the LDO output signal when the load switches between light load and heavy load. However, in related technologies, for the LDO voltage-stabilized power supply system, when the load switches between light load and heavy load, the response speed is slow and the jitter is high.

Therefore, it is necessary to improve the voltage-stabilized power supply system of the above-mentioned LDO.

[Content of the invention]

This application provides a voltage stabilizing circuit and its voltage stabilizing method, integrated circuits and electronic equipment, aiming to solve the problem in related technologies that the response speed of the LDO voltage stabilizing circuit is slow when the load switches between light load and heavy load. .

In order to solve the above technical problems, the first aspect of the embodiment of the present application provides a voltage stabilizing circuit, including a voltage adjustment circuit and a driving circuit;

The driving circuit is used to output driving voltage;

The voltage adjustment circuit is used to charge or discharge the driving circuit according to a preset voltage threshold and the driving voltage, so that the driving voltage is stabilized within a preset voltage range.

The second aspect of the embodiment of the present application provides an integrated circuit, including the first aspect of the embodiment of the present application. The voltage stabilizing circuit described above.

The third aspect of the embodiment of the present application provides an electronic device, including: a load, and a voltage stabilizing circuit as described in the first aspect of the embodiment of the present application or an integrated circuit as described in the second aspect of the embodiment of the present application.

The fourth aspect of the embodiment of the present application provides a voltage stabilizing method, which is applied to the voltage stabilizing circuit described in the first aspect of the embodiment of the present application; the voltage stabilizing method includes:

Control the driving circuit to output the driving voltage;

The voltage adjustment circuit is controlled to charge or discharge the driving circuit according to the preset voltage threshold and the driving voltage, so that the driving voltage is stabilized within the preset voltage range.

From the above description, it can be seen that compared with related technologies, the beneficial effects of this application are:

When the load changes, that is, from light load to heavy load or from heavy load to light load, the driving voltage output by the driving circuit will change accordingly; at this time, the voltage adjustment circuit will quickly adjust the driving circuit. That is, the drive circuit is quickly charged or discharged according to the preset voltage threshold and the current driving voltage, so that the adjusted driving voltage is stabilized within the preset voltage range, thereby enabling rapid response to load changes, thereby effectively improving improves the response speed of the voltage stabilizing circuit.

[Picture description]

In order to explain the related technology or the technical solutions in the embodiments of the present application more clearly, the drawings needed to be used in the description of the related technology or the embodiments of the present application will be briefly introduced below. Obviously, the drawings in the following description These are only some embodiments of the present application, not all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a first module block diagram of a voltage stabilizing circuit provided by an embodiment of the present application;

Figure 2 is a schematic diagram of the first circuit structure of the voltage stabilizing circuit provided by the embodiment of the present application;

Figure 3 is a second module block diagram of the voltage stabilizing circuit provided by the embodiment of the present application;

Figure 4 is a schematic diagram of the second circuit structure of the voltage stabilizing circuit provided by the embodiment of the present application;

Figure 5 is a schematic flow chart of a voltage stabilization method provided by an embodiment of the present application.

【Detailed ways】

In order to make the purpose, technical solutions and advantages of the present application more obvious and easy to understand, the present application will be clearly and completely described below in conjunction with the embodiments of the present application and the corresponding drawings. Wherein, from the beginning Throughout, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions. It should be understood that the various embodiments of the present application described below are only used to explain the present application and are not used to limit the present application. That is, based on the various embodiments of the present application, those of ordinary skill in the art have not made any inventive steps. All other embodiments obtained under the premise of labor fall within the scope of protection of this application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

For the application of LDO, it is necessary to focus on the stability and response speed of the LDO output signal when the load switches between light load and heavy load. However, in related technologies, for the LDO voltage-stabilized power supply system, when the load switches between light load and heavy load, the response speed is slow and the jitter is high. To this end, embodiments of the present application provide a voltage stabilizing circuit.

Please refer to Figure 1, which is a first module block diagram of a voltage stabilizing circuit provided by an embodiment of the present application. As can be seen from Figure 1, the voltage stabilizing circuit provided by the embodiment of the present application includes a voltage adjustment circuit 200 and a driving circuit 100. Specifically, the driving circuit 100 is used to output the driving voltage V _q ; wherein the driving voltage V _q is used to drive the load L. The voltage adjustment circuit 200 is used to charge or discharge the driving circuit 100 according to the preset voltage threshold and the driving voltage V _q obtained from the driving circuit 100 so that the driving voltage V _q is stabilized within the preset voltage range.

In practical applications, after the voltage stabilizing circuit provided by the embodiment of the present application is started, the driving circuit 100 will provide the driving voltage V _q to the load L to satisfy the normal operation of the load L. During the normal operation of the load L, if the load L changes, that is, from a light load to a heavy load or from a heavy load to a light load, the driving voltage V _q output by the driving circuit 100 will also change accordingly. At this time, the voltage adjustment circuit 200 will quickly adjust the drive circuit 100, that is, quickly charge or discharge the drive circuit 100 according to the preset voltage threshold and the drive voltage V _q obtained from the drive circuit 100, so that the adjusted drive The voltage V _q is stabilized within the preset voltage range, thereby enabling rapid response to changes in the load L.

As an implementation manner, the preset voltage range may be a range set based on the preset voltage V _ref ; specifically, a preset voltage V _ref may be set in advance, and the preset voltage V _ref may be used to determine the preset voltage range. voltage range. For example, the voltage value is increased based on the preset voltage V _ref to determine the upper limit threshold of the preset voltage range, and the voltage value is decreased based on the preset voltage V _ref to determine the preset voltage range. Set the lower limit threshold of the voltage range; among them, the upper limit threshold, the lower limit threshold and the value of the preset voltage V _ref are relatively different. Small.

Further, the preset voltage threshold can be set according to the preset voltage V _ref ; for example, the voltage value is increased based on the preset voltage V _ref , or the voltage value is increased based on the preset voltage V _ref . decrease. Of course, it is not limited to this. In other embodiments, the preset voltage threshold can also be set according to multiple voltage values within the preset voltage range; for example, multiple voltage values within the preset voltage range The voltage value is increased based on the average value of the voltage value, or the voltage value is decreased based on the average value of multiple voltage values within the preset voltage range.

It should be understood that the above embodiments are only preferred implementations of the embodiments of the present application, and are not the only limitations on the determination of the preset voltage range and the preset voltage threshold in the embodiments of the present application; in this regard, those skilled in the art can On the basis of the application examples, flexible settings are made according to actual application scenarios.

To sum up, the embodiment of the present application realizes a quick response to changes in the load L by configuring the voltage adjustment circuit 200 to be connected to the drive circuit 100, thereby effectively improving the response speed of the voltage stabilizing circuit.

In some embodiments, please further refer to Figure 2, which is a schematic diagram of the first circuit structure of a voltage stabilizing circuit provided by an embodiment of the present application; the driving circuit 100 can also be used to output the driving current I _q , and the driving circuit 100 can Including operational amplifier AMP, capacitor Cb and output stage branch. Specifically, the output terminal of the operational amplifier AMP is connected to the output stage branch through the capacitor Cb, and the output stage branch feeds back to the input terminal of the operational amplifier AMP. At this time, the voltage adjustment circuit 200 can be connected to the first terminal of the capacitor Cb; wherein, The first terminal of the capacitor Cb is a connection terminal between the capacitor Cb and the output terminal of the operational amplifier AMP. The second end of the capacitor Cb is connected to the output stage branch to drive the output stage branch to output the driving voltage V _q .

For this embodiment, the voltage adjustment circuit 200 can be used to charge or discharge the first end of the capacitor Cb according to the preset voltage threshold and the driving voltage V _q obtained from the driving circuit 100, so that the driving voltage V _q can be stabilized at within the preset voltage range. The drive circuit 100 can also output a drive current, and the drive current I _q is used to drive the load L. Specifically, the drive current can be output through the output stage branch. Here, it is necessary to explain that the capacitor Cb can be a bootstrap capacitor.

As an implementation manner, still referring to Figure 2; the output stage branch may include a first output module and a second output module, and the first output module is used to output the first driving current I _q1 , and the second output module is used to output the third Two driving currents I _q2 ; among them, the first driving current I _q1 is used to drive the load L. Specifically, the operational amplifier The first output terminal of the amplifier AMP can be connected to the first output module through the capacitor Cb, the second output terminal of the operational amplifier AMP can be grounded through the second output module, and the load L and the first input terminal of the operational amplifier AMP can be connected to respectively. The first output module, the second input end of the operational amplifier AMP can be connected to the preset voltage V _ref , and the other end of the load L can be connected to ground.

For this embodiment, the operational amplifier AMP can be used to amplify the difference voltage between the preset voltage V _ref and the driving voltage V _q , and output the amplified difference voltage; wherein, the amplified difference voltage and the capacitance The voltage of Cb can be used to control the first output module to output the first driving current I _q1 . Of course, it is not limited to this. In other implementations, the preset voltage V _ref connected to the second input terminal of the operational amplifier AMP can be replaced with other voltage values within the preset voltage range, or the preset voltage range The average value of multiple voltage values within.

As a specific implementation of this embodiment, still referring to Figure 2; the first output module may include a first output tube D1, and the second output module may include a second output tube D2.

It should be understood that the above-described embodiments are only preferred implementations of the embodiments of the present application and are not the only limitations of the embodiments of the present application on the specific configuration of the output stage branch; in this regard, those skilled in the art can refer to the embodiments of the present application. Basically, flexibly set according to actual application scenarios.

In some embodiments, still referring to FIG. 2 , the driving circuit 100 may include a charging branch in addition to the operational amplifier AMP, the capacitor Cb, and the output stage branch. Specifically, the charging branch is used to charge the second end of the capacitor Cb according to the reference voltage V _TH and the voltage of the second end of the capacitor Cb, so that the voltage of the second end of the capacitor Cb is greater than or equal to the reference voltage V _TH ; where , the second terminal of the capacitor Cb is the connection terminal between the capacitor Cb and the output stage branch.

In this embodiment, when the driving voltage or driving current output by the first output tube D1 cannot meet the driving requirements, the charging branch can be controlled to charge the second end of the capacitor Cb by increasing the voltage of the second end of the capacitor Cb. In this way, the driving voltage V _q of the driving circuit 100 is increased, so that the first output tube D1 can output the first driving current I _q1 that meets the driving requirements; when the first output tube D1 can output the driving current I _q that meets the driving requirements, The charging branch can be controlled not to charge the second end of the capacitor Cb to reduce power consumption. By controlling the intermittent operation of the charging branch, the driving voltage V _q and first driving current I _q1 that meet the driving requirements can be quickly output without significantly increasing power consumption. For example, during the power-on and start-up process, the driving voltage V _q output by the first output tube D1 gradually increases, and it takes a period of time before the can stabilize and meet the driving requirements. At this time, charging the second end of the capacitor Cb through the charging branch can quickly increase the driving voltage V _q so that it can meet the driving requirements, thereby generating the qualified first driving current I _q1 to meet the normal operation of load L. For another example, when the voltage stabilizing circuit is working normally, if the load suddenly increases, the driving voltage V _q will be pulled down, and the first driving current I _q1 cannot meet the increased load demand. At this time, the capacitor can also be charged through the charging branch. The second end of Cb is charged to quickly pull the driving voltage V _q back to the preset value, and increase the first driving current I _q1 within a certain range to meet the increased load demand.

As an implementation manner, a reference voltage V _TH can be set, so that the charging branch charges the second end of the capacitor Cb according to the voltage of the second end of the capacitor Cb and the reference voltage V _TH , so that the second end of the capacitor Cb The voltage at the terminal is greater than or equal to the reference voltage V _TH . For example, when the voltage at the second terminal of the capacitor Cb is less than the reference voltage V _TH , the charging branch can be controlled to charge the second terminal of the capacitor Cb; when the voltage of the capacitor Cb is greater than or equal to the reference voltage V _TH , the charging branch can be controlled. The circuit stops charging the second terminal of the capacitor Cb. It can be understood that the voltage at the second terminal of the capacitor Cb is less than the reference voltage V _TH , indicating that the driving voltage V _q of the driving circuit 100 is low; the voltage at the second terminal of the capacitor Cb is greater than or equal to the reference voltage V _TH , indicating that the driving voltage of the driving circuit 100 is low. V _q meets the requirements. For example, when the voltage stabilizing circuit provided in the embodiment of the present application is powered on or the capacitor Cb has leakage, the voltage at the second end of the capacitor Cb will be less than the reference voltage V _TH , and the second end of the capacitor Cb needs to be inspected. Charge.

As an implementation manner, still referring to FIG. 2 ; the charging branch may include a first comparator CMP1 and a charge pump CP and a transistor TH. Specifically, the output terminal of the first comparator CMP1 may be connected to one terminal of the charge pump CP, the first input terminal of the first comparator CMP1 and the other terminal of the charge pump CP may be respectively connected to the second terminal of the capacitor Cb, and the transistor TH Both ends of can be connected to the first end of the capacitor Cb and the second input end of the first comparator CMP1 respectively.

For this embodiment, the first comparator CMP1 can be used to compare the voltage of the second terminal of the capacitor Cb with the threshold voltage of the transistor TH, and control the charge pump CP to charge the second terminal of the capacitor Cb according to the comparison result; wherein, The threshold voltage of transistor TH is the reference voltage V _TH mentioned above. As an example, when the comparison result of the first comparator CMP1 is that the voltage of the second terminal of the capacitor Cb is less than the threshold voltage of the transistor TH, the charge pump CP can be controlled to charge the second terminal of the capacitor Cb; when the first comparator The comparison result of CMP1 is that the voltage at the second terminal of capacitor Cb is greater than or equal to the transistor When the threshold voltage of TH is reached, the charge pump CP can be controlled to stop charging the second end of the capacitor Cb, thereby allowing the charge pump to work indirectly and reducing power consumption. For example, when the voltage stabilizing circuit provided in the embodiment of the present application is powered on, or when the capacitor Cb has leakage, the voltage at the second end of the capacitor Cb will be less than the threshold voltage of the transistor TH, and the second terminal of the capacitor Cb needs to be adjusted. charging terminal.

It should be understood that the above-mentioned embodiments are only preferred implementations of the embodiments of the present application and are not the only limitations of the embodiments of the present application on the specific configuration of the charging branch; in this regard, those skilled in the art can based on the embodiments of the present application. can be flexibly set according to actual application scenarios.

In some embodiments, still referring to FIG. 2; the preset voltage threshold may include a first voltage threshold and a second voltage threshold, and the first voltage threshold is less than the second voltage threshold; on this basis, the voltage adjustment circuit 200 may include a third voltage threshold. a first regulating branch and a second regulating branch. Specifically, the first regulating branch may be used to compare the driving voltage V _q obtained from the driving circuit 100 with a first voltage threshold, and charge the driving circuit 100 when the driving voltage V _q is lower than the first voltage threshold. ; The second adjustment branch may be used to compare the driving voltage V _q obtained from the driving circuit 100 with the second voltage threshold, and discharge the driving circuit 100 when the driving voltage V _q is higher than the second voltage threshold.

It can be understood that since the preset voltage threshold is set according to at least one voltage value within the preset voltage range, the first voltage threshold and the second voltage threshold are also set according to at least one voltage value within the preset voltage range. For example, the voltage value is increased based on any voltage value within the preset voltage range, or the voltage value is reduced based on any voltage value within the preset voltage range, to respectively set the third voltage value. a voltage threshold and a second voltage threshold; or, the voltage value is increased based on the average value of multiple voltage values within the preset voltage range, or the average value of multiple voltage values within the preset voltage range On the basis of, the voltage value is reduced to respectively set the first voltage threshold and the second voltage threshold. As an example, the voltage value can be increased based on the preset voltage V _ref or the voltage value can be reduced based on the preset voltage V _ref to set the first voltage threshold and the second voltage threshold respectively. voltage threshold.

In practical applications, when the load L changes from light load to heavy load, the voltage stabilizing circuit provided by the embodiment of the present application will produce undervoltage fluctuation, that is, the driving voltage V _q of the driving circuit 100 will decrease. At this time, if the first adjustment If the comparison result of the branch is that the driving voltage V _q is lower than the first voltage threshold, the first regulating branch will charge the driving circuit 100 to increase the driving voltage V _q so that the adjusted driving voltage V _q is stabilized at the predetermined level. within the specified voltage range. When the load L changes from heavy load to light load, the voltage stabilizing circuit provided by the embodiment of the present application will generate Overvoltage fluctuation, that is, the driving voltage V _q of the driving circuit 100 will increase. At this time, if the comparison result of the second adjustment branch is that the driving voltage V _q is higher than the second voltage threshold, the second adjustment branch will affect the driving circuit. 100 performs discharge to reduce the driving voltage V _q so that the adjusted driving voltage V _q is stabilized within a preset voltage range.

As an implementation manner, still referring to FIG. 2 ; the first adjustment branch may include a second comparator CMP2 and a first current source Q1. Specifically, the second comparator CMP2 may be used to compare the driving voltage V _q obtained from the driving circuit 100 with the first voltage threshold, and when the driving voltage V _q is lower than the first voltage threshold, control the first current source Q1 Charge the driving circuit 100; wherein, when the driving voltage V _q obtained from the driving circuit 100 is lower than the first voltage threshold, the second comparator CMP2 outputs a corresponding comparison result, such as outputting a high level, and the high level It is used to control the first current source Q1 to charge the driving circuit 100 to increase the driving voltage V _q so that the adjusted driving voltage V _q is stabilized within a preset voltage range. As an example, the first voltage threshold may be the difference between any voltage value within the preset voltage range or the average value of multiple voltage values and the first preset voltage value V _m , such as the difference between the preset voltage V _ref and The difference between the first preset voltage value V _m (V _ref -V _m ); where the first preset voltage value V _m is the maximum allowable reduction of the driving voltage V _q , and the preset voltage V _ref can Considered as the target of the driving voltage V _q , it is desired to maintain the driving voltage V _q at the preset voltage V _ref .

The second regulation branch may include a third comparator CMP3 and a second current source Q2. Specifically, the third comparator CMP3 may be used to compare the driving voltage V _q obtained from the driving circuit 100 with the second voltage threshold, and when the driving voltage V _q is higher than the second voltage threshold, control the second current source Q2 Discharge the driving circuit 100; wherein, when the driving voltage V _q obtained from the driving circuit 100 is higher than the second voltage threshold, the third comparator CMP3 outputs a corresponding comparison result, such as outputting a low level, and the low level It is used to control the second current source Q2 to discharge the driving circuit 100 to reduce the driving voltage V _q so that the adjusted driving voltage V _q is stabilized within a preset voltage range. As an example, the second voltage threshold may be the sum of any voltage value within the preset voltage range or the average of multiple voltage values and the second preset voltage value V _n , such as the preset voltage V _ref and the sum value (V _ref +V _n ) of the second preset voltage value V _n ; where the second preset voltage value V _n is the maximum allowable increase in the driving voltage V _q .

Based on this, the condition for the second comparator CMP2 to control the first current source Q1 to charge the driving circuit 100 is: the driving voltage V _q obtained from the driving circuit 100 is less than the first voltage threshold, such as less than (V _ref -V _m ) ; The third comparator CMP3 controls the second current source Q2 to discharge the driving circuit 100 The condition is: the driving voltage V _q obtained from the driving circuit 100 is greater than the second voltage threshold, such as greater than (V _ref +V _n ).

For this embodiment, the output terminal of the second comparator CMP2 can be connected to the first current source Q1, the output terminal of the third comparator CMP3 can be grounded through the second current source Q2, and the first input terminal of the second comparator CMP2 and The first input terminal of the third comparator CMP3 can be connected to the first input terminal of the operational amplifier AMP respectively, the second input terminal of the second comparator CMP2 can be connected to the first voltage threshold, and the second input terminal of the third comparator CMP3 The terminal can be connected to the second voltage threshold, the first current source Q1 and the second current source Q2 can be commonly connected to a node, and the node can be connected to the first terminal of the capacitor Cb, so as to realize the switching of the first current source Q1 to the capacitor Cb. Charging of the first terminal, or discharging of the first terminal of the capacitor Cb by the second current source Q2.

In this embodiment, when the load L changes from light load to heavy load, the voltage stabilizing circuit provided by the embodiment of the present application will produce undervoltage fluctuation, that is, the driving voltage V _q of the driving circuit 100 will decrease. At this time, if the second The comparison result of the comparator CMP2 is that the driving voltage V _q is less than the first voltage threshold, then the second comparator CMP2 controls the first current source Q1 to charge the driving circuit 100 , specifically charging the first end of the capacitor Cb to increase the voltage. The voltage at the first end of the capacitor Cb causes the voltage at the second end of the capacitor Cb to rise accordingly, thereby increasing the driving voltage V _q of the driving circuit 100 so that the adjusted driving voltage V _q is stabilized within a preset voltage range. When the load L changes from heavy load to light load, the voltage stabilizing circuit provided by the embodiment of the present application will produce overvoltage fluctuation, that is, the driving voltage V _q of the driving circuit 100 will increase. At this time, if the comparison of the third comparator CMP3 As a result, the driving voltage V _q is greater than the second voltage threshold, and the third comparator CMP3 will control the second current source Q2 to discharge the driving circuit 100 , specifically to discharge the first terminal of the capacitor Cb to pull down the third terminal of the capacitor Cb. The voltage at one end of the capacitor Cb is lowered, thereby lowering the driving voltage V _q of the driving circuit 100 , so that the adjusted driving voltage V _q is stabilized within a preset voltage range.

It should be understood that the above-described embodiments are only preferred implementations of the embodiments of the present application, and are not the only limitations of the embodiments of the present application on the specific configuration of the voltage adjustment circuit 200; in this regard, those skilled in the art can refer to the embodiments of the present application. Basically, flexibly set according to actual application scenarios.

In some embodiments, please further refer to Figure 3, which is a second module block diagram of the voltage stabilizing circuit provided by the embodiment of the present application; it can be seen from Figure 3 that the voltage stabilizing circuit provided by the embodiment of the present application can In addition to the driving circuit 100 and the voltage regulating circuit 200 , a current regulating circuit 300 connected to the driving circuit 100 may also be included. Specifically, the current adjustment circuit 300 is used to compensate the driving current I _q according to the driving current I _q and the load current _IL obtained from the driving circuit 100 so as to stabilize the driving current I _q within a preset current range; where, The load current I _L is the current of the load L.

For this embodiment, the current adjustment circuit 300 can be connected to the output stage branch in the drive circuit 100, and can adjust the first drive current I _{q1 according to the first drive current I q1} and the load current _IL obtained from the drive circuit ₁₀₀ Compensate, or compensate the first drive current I q1 according to the first drive current I _q1 , _the second drive current I _q2 and the load current _IL obtained from the drive circuit 100 , so that the first drive current I _q1 is stabilized at within the preset current range.

In practical applications, after the voltage stabilizing circuit provided by the embodiment of the present application is started, the driving circuit 100 will provide the driving current I _q (including the first driving current I _q1 and the second driving current I _q2 ) to the load L to satisfy the load L of normal operation. During the normal operation of the load L, if the load L changes (ie, from light load to heavy load or from heavy load to light load), the driving current I _q output by the driving circuit 100 will also change accordingly. (i.e. increase or decrease). At this time, the current adjustment circuit 300 will quickly adjust the driving circuit 100, that is, quickly according to the first driving current I _q1 and the load current _IL obtained from the driving circuit 100, or the first driving current I _q1 and the second driving current I _q2 and the load current _IL , the first drive current I _q1 is compensated so that the adjusted first drive current I _q1 is stable within the preset current range, thereby achieving steady flow to changes in the load L, and thus effectively Ground reduces the jitter of the circuit when the load L changes.

As an implementation manner, please further refer to FIG. 4 , which is a schematic diagram of the second circuit structure of the voltage stabilizing circuit provided by the embodiment of the present application; the current adjustment circuit 300 may include a control branch and a third current source Q3. Specifically, the control branch is used to control the third current source Q3 to output the compensation current _{I d} for compensating the first driving current I _q1 according to the first driving current I _q1 and the load current IL obtained from the driving circuit 100 , or control the third current source _Q3 to output the compensation current I used to compensate the first drive current I q1 according to the first drive current I _q1 , the second drive current I _q2 and the load current _IL obtained from the drive circuit 100 _d , so that the first driving current I _q1 is stable within the preset current range.

In practical applications, when the load L changes from light load to heavy load (that is, the load current _IL increases), or when the load L changes from heavy load to light load (that is, the load current _IL decreases), the first driving current I _{Both q1} and the second driving current I _q2 will change accordingly; at this time, the control branch needs to be controlled according to the first value obtained from the driving circuit 100 The driving current I _q1 and the load current _IL , or the third current source Q3 is controlled to output the corresponding compensation current I _d according to the first driving current I _q1 , the second driving current I _q2 and the load current _IL obtained from the driving circuit 100 , to compensate the first driving current I _q1 so that the compensated first driving current I _q1 is stable within the preset current range.

For this embodiment, the compensation current I _d output by the third current source Q3 may include the first compensation current I _d1 and the second compensation current I _d2 , and the lower limit threshold of the preset current range may be the first current threshold I _t1 and the upper limit threshold. can be the second current threshold I _t2 , and the first current threshold I _t1 can be 0, that is, the preset current range is [first current threshold I _t1 , second current threshold I _t2 ]; wherein, the compensation current I _d actually It is the output current of the third current source Q3, and the first compensation current I _d1 and the second compensation current I _d2 are just different values. Based on this, the control branch controls the third current source Q3 not to compensate the first driving current I _q1 , that is, the condition for controlling the current of the third current source Q3 to remain unchanged can be: the first driving current I _q1 belongs to (first current threshold I _t1 , second current threshold I _t2 ], that is, the first driving current I _q1 takes a value between the first current threshold I _t1 and the second current threshold I _t2 , and the minimum value of the first driving current I _q1 cannot be equal to the A current threshold I _t1 , the maximum value of the first driving current I _q1 is equal to the second current threshold I _t2 ; at the same time, the second driving current I _q2 is equal to the first current threshold I _t1 . Here, it is necessary to explain that this embodiment The first current threshold I _t1 in is taken to be 0.

In this embodiment, when the first driving current I _q1 is greater than the second current threshold I _t2 , the control branch controls the third current source Q3 to output the first compensation current I _d1 to correct the first driving current I _q1 . direction compensation; when the first drive current I _q1 is less than or equal to the first current threshold I _t1 , and the second drive current I _q2 is greater than the first current threshold I _t1 , the control branch will control the third current source Q3 to output the second compensation The current I _d2 is used to reversely compensate the first driving current I _q1 .

Further, when the first driving current I _q1 is greater than the second current threshold I _t2 , the control branch controls the third current source Q3 to perform forward compensation on the first driving current I _q1 as follows: according to the first driving current I _q1 exceeding The value of the second current threshold I _t2 determines the size of the first compensation current I _d1 that needs to be provided by the third current source Q3, that is, the first compensation current I _d1 is used to compensate the first driving current I _q1 exceeding the second current threshold I _t2 part, thereby reducing the size of the first driving current I _q1 so that the compensated first driving current I _q1 is stable within the preset current range. When the first driving current I _q1 is less than or equal to the first current threshold I _t1 , and the second driving current I _q2 is greater than the first current threshold I _t1 , the control branch controls the third current source Q3 to control the first driving current. The reverse compensation of I _q1 can be as follows: determining the size of the second compensation current I _d2 based on the sum of the second drive current I _q2 and the load current _IL . The second compensation current I _d2 is the reduction of the third current source Q3 that needs to be controlled. Small current, that is to say, the current reduced by the third current source Q3 is the second compensation current I _d2 output by the third current source Q3, thereby increasing the size of the first driving current I _q1 , so that the compensated third A driving current I _q1 is stable within the preset current range. When the first driving current I _q1 belongs to (first current threshold I _t1 , second current threshold I _t2 ], and the second driving current I _q2 is equal to the first current threshold I _t1 , the control branch will control the third current source Q3 Keep the original compensation unchanged, that is, keep the current of the third current source Q3 unchanged.

As an implementation manner, still referring to FIG. 4 ; in addition to the control branch and the third current source Q3, the current adjustment circuit 300 may also include an A/D conversion branch. Specifically, the A/D conversion branch is used to perform A/D conversion on the first driving current I _q1 , the second driving current I q2 and the load current IL obtained from the driving circuit 100 , and output the converted first driving current I q1 , the second driving current I _q2 and the load current _IL . The current I _q1 , the converted second driving current I _q2 and the converted load current _IL are sent to the control branch.

It should be understood that the above-described embodiments are only preferred implementations of the embodiments of the present application and are not the only limitations of the embodiments of the present application on the specific configuration of the current adjustment circuit 300; in this regard, those skilled in the art can refer to the embodiments of the present application. Basically, flexibly set according to actual application scenarios.

In order to clearly understand the voltage stabilizing circuit provided by the embodiment of the present application, the working process and principle of the voltage stabilizing circuit provided by the embodiment of the present application will be described in detail below with reference to specific examples. In this example, the preset voltage range is [1V, 3V]; the preset voltage V _ref is 1.2V; the first voltage threshold is 1.2VV _m and the second voltage threshold is 1.2V+V _n ; the preset current range is [0,10mA], that is, the first current threshold I _t1 is 0, and the second current threshold I _t2 is 10 mA; the condition for the control branch to control the third current source Q3 not to compensate the first drive current I _q1 is: the first drive The current I _q1 belongs to (0,10mA], and the second driving current I _q2 is equal to 0.

When the voltage stabilizing circuit provided by the embodiment of the present application has just started, the voltage at the second end of the capacitor Cb is 0, which is less than the reference voltage V _TH . The first output tube D1 cannot output the first driving current I _q1 , and the first comparator CMP1 controls The charge pump CP charges the second terminal of the capacitor Cb, causing the voltage of the second terminal of the capacitor Cb to increase; after the voltage of the second terminal of the capacitor Cb is greater than or equal to the reference voltage V _TH , the first output tube D1 can output the first Driving current I _q1 , the first comparator CMP1 controls the charge pump CP to turn off, that is, it controls the charge pump CP to stop charging the second end of the capacitor Cb to reduce power consumption; assume that the first output tube D1 outputs the first driving current to the load L After I _q1 , the load current _IL is 100μA. At this time, the first driving current I _q1 It is equal to the load current _IL (that is, I _q1 = _IL =100μA) and is less than the second current threshold (10mA), that is, it belongs to (0,10mA]; the current of the third current source Q3 is equal to 0.

When the load current _IL increases ΔI _L1 =20mA, that is, when the load L changes from light load to heavy load, the load current _IL =100μA+ΔI _L1 , the voltage stabilizing circuit provided by the embodiment of the present application generates undervoltage fluctuations, and the driving circuit The driving voltage V _q of 100 is pulled down; at this time, if the comparison result of the second comparator CMP2 is that the driving voltage V _q is less than the first voltage threshold (1.2VV _m ), the second comparator CMP2 will control the first current source Q1 charges the driving circuit 100 to quickly increase the driving voltage V _q to near the preset voltage V _ref (1.2V), that is, the adjusted driving voltage V _q is stabilized within the preset voltage range [1V, 3V]. After that, since the first driving current I _q1 is equal to the load current _IL , and the load current _IL is 20.1mA, the first driving current I _q1 is also 20.1mA, which is greater than the second current threshold (10mA), then the control branch The third current source Q3 will be controlled to output the first compensation current I _d1 to perform positive compensation on the first drive current I _q1 , that is, increase the current of the third current source Q3 (for example, to 10.1mA; at this time, I _d1 = 10.1mA), so that the first driving current I _q1 is reduced to 10mA to stabilize the first driving current I _q1 within the preset current range [0,10mA]; at this time, the load current _IL is equal to the compensated The sum of the first driving current I _q1 and the first compensation current I _d1 is I _L =I _q1 +I _d1 =10mA+10.1mA=20.1mA (this is because I _q2 +I _L =I _q1 +I _d1 , and I _q2 =0, so _IL =I _q1 +I _d1 ).

When the load current _IL continues to decrease by ΔI _L2 =20mA, that is, when the load L changes from heavy load to light load, the load current _IL =20.1mA-ΔI _L2 =100μA, the voltage stabilizing circuit provided by the embodiment of the present application generates an overvoltage. Fluctuation, the driving voltage V _q of the driving circuit 100 is pulled high; at this time, if the comparison result of the third comparator CMP3 is that the driving voltage V _q is greater than the second voltage threshold (1.2V+V _Q2 ), then the third comparator CMP3 The second current source Q2 will be controlled to discharge the driving circuit 100 to quickly pull down the driving voltage V _q to near the preset voltage V _ref (1.2V), that is, the adjusted driving voltage V _q will be stabilized within the preset voltage range [ 1V,3V]. At this time, the current of the third current source Q3 is still the value 10.1mA after the load L changed from light load to heavy load in the previous stage. Since the first drive current I _q1 and the compensation current I _d (the first compensation current I _d1 or The sum of the second compensation current I _d2 ) is equal to the sum of the second drive current I _q2 and the load current _IL , that is, I _q1+ I _d (I _d1 or I _d2 ) ₌ I _{q2+ IL} , and the first drive current I _q1 is set =0, then the second driving current I _q2 =10.1mA- _IL =10.1mA-100μA=10mA. Afterwards, since the first driving current I _q1 =0 does not belong to (0,10mA], and the second driving current I _q2 =10mA>0, the control branch will control the third current source Q3 to output the second compensation current I _d2 , to carry out the first driving current I _q1 Perform reverse compensation, that is, reduce the current of the third current source Q3 (for example, to 0; at this time, I _d2 = 0), so that the value of the first driving current I _q1 increases to 100 μA. Correspondingly, the second The value of the driving current I _q2 becomes 0, thus stabilizing the first driving current I _q1 within the preset current range [0,10mA]; at this time, the load current _IL is equal to the compensated first driving current I q1 and the first driving current I _q1 The sum of two compensation currents I _d2 , that is, I _L =I _q1 +I _d2 =100μA (this is because I _q2 +I _L =I _q1 +I _d2 , and I _q2 =0, so I _L =I _q1 +I _d2 ).

By adding a current adjustment circuit, the embodiment of the present application can quickly adjust the drive circuit 100, that is, quickly adjust the drive circuit 100 according to the first drive current I _q1 and the load current _IL (or the first drive current I _q1 , the second drive current I q1 obtained from the drive circuit 100 The drive current I _q2 and the load current _IL ) compensate the drive circuit 100 , that is, the first drive current I _q1 is compensated so that the compensated first drive current I _q1 is stable within the preset current range, so that Achieve steady flow against changes in load L. It can be seen that this application effectively improves the response speed of the voltage stabilizing circuit and reduces the jitter of the circuit when the load L changes through the correlation and combination of the voltage regulating circuit 200 and the current regulating circuit 300 .

Based on the foregoing description, embodiments of the present application provide a voltage stabilizing circuit. In fact, the voltage stabilizing circuit can be applied to an integrated circuit including multiple circuits; wherein, the multiple circuits included in the integrated circuit include at least one voltage stabilizing circuit provided by the embodiment of the present application.

On this basis, the above integrated circuit can be applied to electronic devices; where the electronic devices can include but are not limited to mobile phones, tablet computers, notebook computers, desktop computers, intelligent learning machines and intelligent wearable devices. In addition, the voltage stabilizing circuit provided by the embodiment of the present application can also be applied to these electronic devices alone, and is no longer provided in these electronic devices in the form of the above-mentioned integrated circuit.

Please refer to FIG. 5 , which is a schematic flowchart of a voltage stabilizing method provided by an embodiment of the present application.

As shown in Figure 5, the embodiment of the present application also provides a voltage stabilizing method, which is applied to the voltage stabilizing circuit provided by the embodiment of the present application; the voltage stabilizing method specifically includes the following steps:

Step 501: Control the driving circuit to output a driving voltage.

In the embodiment of the present application, after the voltage stabilizing circuit provided by the embodiment of the present application is started, the drive circuit 100 needs to be controlled to output the drive voltage V _q to ensure the normal operation of the load L.

Step 502: Control the voltage adjustment circuit to charge or discharge the driving circuit according to the preset voltage threshold and the driving voltage, so that the driving voltage is stabilized within the preset voltage range.

In the embodiment of this application, when the load L is working normally, if the load L changes, that is, the light load L changes. When the load changes to a heavy load or from a heavy load to a light load, the driving voltage V _q output by the driving circuit 100 will also change accordingly. At this time, the voltage adjustment circuit 200 will quickly adjust the drive circuit 100, that is, quickly charge or discharge the drive circuit 100 according to the preset voltage threshold and the drive voltage V _q obtained from the drive circuit 100, so that the adjusted drive The voltage V _q is stabilized within the preset voltage range, thereby enabling rapid response to changes in the load L.

Embodiments of the present application provide a voltage stabilizing circuit, an integrated circuit, an electronic device, and a voltage stabilizing method. The voltage stabilizing circuit/integrated circuit/electronic device all include a voltage adjustment circuit 200 and a driving circuit 100, and when the load L changes, That is, after changing from light load to heavy load or from heavy load to light load, the driving current I _q and the driving voltage V _q output by the driving circuit 100 will change accordingly; at this time, the voltage adjustment circuit 200 will quickly adjust the load. The driving circuit 100 adjusts, that is, quickly charges or discharges the driving circuit 100 according to the preset voltage threshold and the driving voltage V _q obtained from the driving circuit 100, so that the adjusted driving voltage V _q is stabilized within the preset voltage range. , thus enabling a fast response to changes in load L, effectively improving the response speed of the voltage stabilizing circuit, and reducing the jitter of the circuit when load L changes.

The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be implemented directly in hardware, in software modules executed by a processor, or in a combination of both. Software modules may be located in random access memory (RAM), memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or anywhere in the field of technology. any other known form of storage media.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in this application are generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device. Computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, e.g., computer instructions may be transmitted from a website, computer, server or data center via a wired link (e.g. Coaxial cable, optical fiber, digital subscriber line) or wireless (such as infrared, wireless, microwave, etc.) means to transmit to another website, computer, server or data center. Computer-readable storage media can be any available media or packages that can be accessed by the computer. Data storage devices such as servers and data centers that contain one or more available media integrations. Available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk), etc.

It should be noted that each embodiment in the content of this application is described in a progressive manner. Each embodiment focuses on its differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. That’s it. For method embodiments, since they are similar to product embodiments, the description is relatively simple. For relevant details, please refer to the partial description of product embodiments.

It should also be noted that in the content of this application, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or any such actual relationship or sequence between operations. Furthermore, the terms "comprises," "comprises," or any other variations thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article, or apparatus that includes the stated element.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the content of the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined in this disclosure may be applied to other embodiments without departing from the spirit or scope of this disclosure. accomplish. Therefore, this disclosure is not intended to be limited to the embodiments shown in this disclosure but is to be accorded the widest scope consistent with the principles and novel features disclosed in this disclosure.

Claims (15)

1. A voltage stabilizing circuit, characterized by including a voltage adjustment circuit and a driving circuit;

   The driving circuit is used to output driving voltage;

   The voltage adjustment circuit is used to charge or discharge the driving circuit according to a preset voltage threshold and the driving voltage, so that the driving voltage is stabilized within a preset voltage range.
2. The voltage stabilizing circuit of claim 1, wherein the driving circuit includes an operational amplifier, a capacitor and an output stage branch;

   The output terminal of the operational amplifier is connected to the output stage branch through the capacitor, and the output stage branch feeds back to the input terminal of the operational amplifier;

   The voltage adjustment circuit is connected to the first end of the capacitor to charge or discharge the first end of the capacitor; wherein the first end is the connection end between the capacitor and the output end of the operational amplifier. ;

   The second end of the capacitor is connected to the output stage branch to drive the output stage branch to output the driving voltage.
3. The voltage stabilizing circuit of claim 2, wherein the driving circuit further includes a charging branch; the charging branch is used to perform charging on the second terminal according to the reference voltage and the voltage of the second terminal. Charge.
4. The voltage stabilizing circuit of claim 3, wherein the charging branch includes a first comparator and a charge pump;

   The first comparator is used to compare the voltage of the second terminal with the reference voltage, and control the charge pump to charge the second terminal according to the comparison result, so that the voltage of the second terminal is greater than or equal to the reference voltage.
5. The voltage stabilizing circuit of claim 1, wherein the preset voltage threshold includes a first voltage threshold and a second voltage threshold; wherein the first voltage threshold is smaller than the second voltage threshold;

   The voltage regulation circuit includes a first regulation branch and a second regulation branch;

   The first regulating branch is used to compare the driving voltage with the first voltage threshold, and charge the driving circuit when the driving voltage is lower than the first voltage threshold;

   The second regulating branch is used to compare the driving voltage with the second voltage threshold, and discharge the driving circuit when the driving voltage is higher than the second voltage threshold.
6. The voltage stabilizing circuit of claim 5, wherein the first regulating branch includes a second comparator and a first current source;

   The second comparator is used to compare the driving voltage with the first voltage threshold, and when the driving voltage is lower than the first voltage threshold, control the first current source to control the driving circuit. to charge;

   The second regulating branch includes a third comparator and a second current source;

   The third comparator is used to compare the driving voltage with the second voltage threshold, and when the driving voltage is higher than the second voltage threshold, control the second current source to control the driving circuit. Carry out discharge.
7. The voltage stabilizing circuit according to any one of claims 1 to 6, characterized in that the driving circuit is also used to output a driving current, and the voltage stabilizing circuit further includes a current regulating circuit; the current regulating circuit is used according to The driving current and the load current compensate the driving current so that the driving current is stabilized within a preset current range.
8. The voltage stabilizing circuit of claim 7, wherein the drive circuit includes an output stage branch;

   The current adjustment circuit is connected to the output stage circuit to compensate the driving current.
9. The voltage stabilizing circuit of claim 8, wherein the output stage branch includes a first output module and a second output module; wherein the first output module is used to output a first driving current, and the The second output module is used to output the second driving current;

   The current adjustment circuit is used to compensate the first driving current according to the first driving current and the load current, or to compensate the first driving current according to the first driving current, the second driving current and the load current. , to compensate the first driving current so that the first driving current is stable within the preset current range.
10. The voltage stabilizing circuit of claim 9, wherein the current adjustment circuit includes a control branch and a third current source;

    The control branch is used to control the third current source to output a compensation current to compensate the first drive current according to the first drive current and the load current, or to control the first drive current, The second drive current and the load current control the third current source to output a compensation current that compensates the first drive current, so that the first drive current stabilizes within the preset current range. .
11. The voltage stabilizing circuit of claim 10, wherein the lower threshold of the preset current range is a first current threshold and the upper threshold is a second current threshold, and the compensation current includes a first compensation current and a second Compensation current;

    When the first driving current is greater than the second current threshold, the control branch controls the third current source to output the first compensation current to perform forward compensation on the first driving current;

    When the first driving current is less than or equal to the first current threshold and the second driving current is greater than the first current threshold, the control branch controls the third current source to output the second Compensating current to reversely compensate the first driving current.
12. The voltage stabilizing circuit of claim 11, wherein when the first driving current is greater than the second current threshold, the control branch exceeds the second current threshold according to the first driving current. The value determines the size of the first compensation current;

    When the first driving current is less than or equal to the second current threshold, and the second driving current is greater than the first current threshold, the control branch controls the The sum determines the magnitude of the second compensation current.
13. An integrated circuit, characterized by comprising the voltage stabilizing circuit according to any one of claims 1-12.
14. An electronic device, characterized in that it includes a load, and a voltage stabilizing circuit according to any one of claims 1 to 12 or an integrated circuit according to claim 13.
15. A voltage stabilizing method, characterized in that it is applied to the voltage stabilizing circuit according to any one of claims 1 to 12; the voltage stabilizing method includes:

    Control the driving circuit to output the driving voltage;

    The voltage adjustment circuit is controlled to charge or discharge the driving circuit according to the preset voltage threshold and the driving voltage, so that the driving voltage is stabilized within the preset voltage range.