CN114123778B

CN114123778B - Self-adaptive compensation circuit, protection circuit and integrated circuit

Info

Publication number: CN114123778B
Application number: CN202111410989.XA
Authority: CN
Inventors: 李桂萍; 何雪峰; 王雄伟
Original assignee: Jihai Microelectronics Co ltd; Zhuhai Geehy Semiconductor Co Ltd
Current assignee: Jihai Microelectronics Co ltd; Zhuhai Geehy Semiconductor Co Ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2024-01-19
Anticipated expiration: 2041-08-23
Also published as: CN114123779A; CN113687682A; CN114123779B; CN114123778A; CN114115413A

Abstract

The application provides a self-adaptation compensation circuit, protection circuit and integrated circuit, in this self-adaptation compensation circuit, detection module can detect the power supply branch road of target circuit, and thereby comparison module can carry out signal comparison according to the first signal that detects and judge whether the working signal of target circuit reaches the preset value that the chip corresponds when normally working to send corresponding control signal to compensation module according to the comparison result, thereby, compensation module can confirm corresponding compensation strategy according to control signal. The compensation circuit can adaptively compensate the target circuit, so that the chip can work normally under different conditions.

Description

Self-adaptive compensation circuit, protection circuit and integrated circuit

Technical Field

The application relates to the technical field of circuits, in particular to a power supply signal compensation circuit and a consumable chip.

Background

For some chips, such as the micro control unit MCU (Microcontroller Unit), the digital signal processing unit DSP (Digital Signal Processor), the microprocessor unit MPU (Microprocessor Unit), the system on chip SOC (System on Chip) for consumable materials, or the power management system BMS (Battery Management System), the working voltage or the working current of the chip may also be different during the practical application due to the differences between the chip processes or the combination of the components.

The chip is usually provided with a specific driving current range or a driving voltage range, and when the current in the circuit in which the chip operates does not reach the specific current range corresponding to the chip, or the voltage in the circuit in which the chip operates does not reach the specific voltage range corresponding to the chip, the chip cannot operate.

In addition, if the operating current is too high for some circuits, the current may be burned out.

Disclosure of Invention

The application provides a power supply signal compensation circuit and consumable chip for solve the problem that prior art exists.

In a first aspect, the present application provides a power supply signal compensation circuit, connected to a power supply branch of a target circuit, for detecting and adaptively compensating a power supply signal of the target circuit, comprising: the device comprises a detection module, a comparison module and a compensation module;

the detection module is connected to a power supply branch circuit for driving the target circuit to work and the comparison module, and is used for detecting a first signal of the power supply branch circuit of the target circuit and sending the first signal to the comparison module;

the comparison module is used for receiving the first signal and acquiring a second signal, wherein the second signal is used for assisting in determining whether the first signal of the power supply branch reaches a preset value or not; and comparing the first signal with the second signal to obtain a comparison result, and sending a corresponding control signal to the compensation module according to the comparison result,

The compensation module is used for determining a compensation strategy of the target circuit according to the control signal.

In some embodiments, the compensation strategy comprises: and when the first signal is determined not to reach a preset value, compensating the target circuit so that the working signal input to the target circuit reaches the preset value.

In some embodiments, the compensation strategy comprises: and when the first signal is determined not to reach a preset value, compensating the target circuit so that the working signal flowing out of the target circuit reaches the preset value.

In some embodiments, the detection module is connected to a power supply VCC to which the target circuit is connected.

In some embodiments, the compensation module comprises a switching tube; when the switching tube is in an on state, the compensation module performs current compensation on the target circuit.

In some embodiments, the compensation module comprises a switching tube; when the switching tube is in an on state, the compensation module is used for carrying out voltage compensation on the target circuit.

In some embodiments, the first signal and the second signal are both voltage signals, and the comparison module includes a voltage comparator.

In some embodiments, the first signal and the second signal are both current signals, and the comparison module includes a current comparator.

In some embodiments, the detection module includes a first resistor and a second resistor, the second resistor having a resistance value greater than a resistance value of the first resistor;

one end of the first resistor is connected with a power supply, and the other end of the first resistor is connected with the target circuit;

one end of the second resistor is connected to a passage between the first resistor and the power supply, and the other end of the second resistor is grounded;

the other end of the second resistor is also connected with a first input end of the voltage comparator, and the first signal comprises a first voltage signal corresponding to the second resistor;

the second input end of the voltage comparator is connected with the other end of the first resistor, and the second signal comprises a second voltage signal corresponding to the first resistor;

the voltage comparator is used for comparing the first voltage signal with the second voltage signal to obtain a comparison result, and outputting a control signal for controlling the switching tube to be turned on or turned off to a control end of the switching tube according to the comparison result;

The input end of the switching tube is connected with the other end of the first resistor, the output end of the switching tube is grounded, when the switching tube enters a conducting state, the other end of the first resistor is grounded, and the switching tube performs current compensation on the target circuit, so that the compensated working current of the target circuit reaches a preset current value.

In some embodiments, the compensation module further comprises a third resistor; the detection module comprises a first resistor and a second resistor, and the resistance value of the second resistor is larger than that of the first resistor;

the input end of the switching tube is connected with the other end of the first resistor through the third resistor, or the output end of the switching tube is grounded through the third resistor; when the switching tube enters a conducting state, the other end of the first resistor is grounded through the third resistor, and the switching tube and the third resistor perform voltage compensation on the target circuit so that the compensated working voltage of the target circuit reaches a preset voltage value.

In some embodiments, the detection module includes a sixth resistor;

the target circuit is connected with a power supply, one end of the sixth resistor is connected to a passage between the power supply and the target circuit, and the other end of the sixth resistor is grounded;

the first input end of the voltage comparator is connected with one end of the sixth resistor, the first signal comprises a third voltage signal corresponding to the sixth resistor, the second input end of the voltage comparator is connected with a reference voltage source, and the second signal comprises a reference voltage signal provided by the reference voltage source;

The voltage comparator is used for comparing the third voltage signal with the reference voltage signal to obtain a comparison result, and outputting a control signal for controlling the switching tube to be turned on or turned off to a control end of the switching tube according to the comparison result;

the input end of the switching tube is connected to a passage between the power supply and the target circuit, and the output end of the switching tube is grounded; when the switch tube enters a conducting state, the power supply is grounded through the switch tube; and the switching tube performs current compensation on the target circuit so that the compensated working current of the target circuit reaches a preset current value.

In some embodiments, the detection module includes a sixth resistor; the compensation module further comprises a seventh resistor;

the input end of the switching tube is connected to a passage between the power supply and the target circuit through the seventh resistor, or the output end of the switching tube is grounded through the seventh resistor; when the switching tube enters a conducting state, the power supply is grounded through the switching tube and the seventh resistor; and the switching tube and the seventh resistor perform voltage compensation on the target circuit so that the compensated working voltage of the target circuit reaches a preset voltage value.

In some embodiments, the detection module includes a first resistor and a second resistor, the second resistor having a resistance value greater than a resistance value of the first resistor, the comparison module further including an eighth resistor;

The other end of the second resistor is also connected with a first input end of the current comparator, and the first signal comprises a first current signal corresponding to the second resistor;

the second input end of the current comparator is connected with the other end of the first resistor through the eighth resistor, and the second signal comprises a second current signal corresponding to the first resistor; or, the second input end of the current comparator is connected with a reference voltage source through the eighth resistor, and the second signal comprises a reference current signal provided by the reference voltage source;

the current comparator is used for comparing the first current signal with the second current signal or the reference current signal to obtain a comparison result, and outputting a control signal for controlling the switching tube to be turned on or turned off to a control end of the switching tube according to the comparison result;

In some embodiments, the compensation module further comprises a third resistor; the detection module comprises a first resistor and a second resistor, the resistance value of the second resistor is larger than that of the first resistor, and the comparison module further comprises an eighth resistor;

The input end of the switching tube is connected with the other end of the first resistor through the third resistor, or the output end of the switching tube is grounded through the third resistor;

when the switching tube enters a conducting state, the other end of the first resistor is grounded through the third resistor, and the switching tube and the third resistor perform voltage compensation on the target circuit so that the compensated working voltage of the target circuit reaches a preset voltage value.

In some embodiments, the detection module includes a sixth resistor, and the comparison module further includes an eighth resistor;

the first input end of the current comparator is connected with one end of the sixth resistor, the first signal comprises a third current signal corresponding to the sixth resistor, the second input end of the current comparator is connected with a reference voltage source through the eighth resistor, and the second signal comprises a reference current signal provided by the reference voltage source;

the current comparator is used for comparing the third current signal with the reference current signal to obtain a comparison result, and outputting a control signal for controlling the switching tube to be turned on or turned off to a control end of the switching tube according to the comparison result;

The input end of the switching tube is connected to a passage between the power supply and the target circuit, the output end of the switching tube is grounded, and when the switching tube enters a conducting state, the power supply is grounded through the switching tube; and the switching tube performs current compensation on the target circuit so that the compensated working current of the target circuit reaches a preset current value.

In some embodiments, the detection module includes a sixth resistor, and the comparison module further includes an eighth resistor; the compensation module further comprises a seventh resistor;

The input end of the switching tube is connected to a passage between the power supply and the target circuit through the seventh resistor, or the output end of the switching tube is grounded through the seventh resistor;

when the switching tube enters a conducting state, the power supply is grounded through the switching tube and the seventh resistor; and the switching tube and the seventh resistor perform voltage compensation on the target circuit so that the compensated working voltage of the target circuit reaches a preset voltage value.

In a second aspect, the present application provides a consumable chip, including the power supply signal compensation circuit described above.

According to the power supply signal compensation circuit (hereinafter referred to as compensation circuit) and the consumable chip, in the compensation circuit, the detection module can detect the power supply branch of the target circuit, the comparison module can compare signals according to the detected first signals so as to judge whether the working signal of the target circuit reaches the preset value corresponding to the chip in normal operation or not, and the corresponding control signal is sent to the compensation module according to the comparison result, so that the compensation module can determine the corresponding compensation strategy according to the control signal. When the working signal of the target circuit reaches a preset value, the chip can work normally, and compensation is not needed at the moment; when the working signal of the target circuit does not reach the preset value, the chip cannot work normally, and compensation is needed for the target circuit at the moment, so that the working signal of the target circuit reaches the preset value, and the chip can work normally. The compensation circuit can adaptively compensate the target circuit, so that the chip can work normally under different conditions.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a schematic diagram of a compensation circuit according to a first embodiment of the present disclosure;

fig. 2 is a schematic diagram of a specific circuit of a compensation circuit according to a third embodiment of the present application;

fig. 3 is a schematic diagram of a specific circuit of a compensation circuit according to a fourth embodiment of the present application;

fig. 4 is a schematic diagram of a specific circuit of a compensation circuit provided in a fifth embodiment of the present application;

fig. 5 is a schematic diagram of a specific circuit of a compensation circuit according to a sixth embodiment of the present application;

fig. 6 is a schematic diagram of a specific circuit of a compensation circuit according to a seventh embodiment of the present application;

fig. 7 is a schematic diagram of a specific circuit of a compensation circuit according to an eighth embodiment of the present application;

fig. 8 is a schematic diagram of a specific circuit of a compensation circuit according to the tenth embodiment of the present application;

fig. 9 is a schematic diagram of a specific circuit of a compensation circuit according to an eleventh embodiment of the present application;

fig. 10 is a schematic diagram of a specific circuit of a compensation circuit according to the twelfth embodiment of the present application;

FIG. 11 is a schematic diagram of a compensation circuit according to the thirteenth embodiment of the present application;

FIG. 12 is a schematic diagram of a specific circuit of a compensation circuit according to a fourteenth embodiment of the present disclosure;

FIG. 13 is a schematic diagram of a specific circuit of a compensation circuit according to fifteen embodiments of the present application;

FIG. 14 is a schematic diagram of an integrated circuit according to a sixteenth embodiment of the present application;

FIG. 15 is a schematic diagram of a compensation circuit for over-current protection according to an eighteenth embodiment of the present application;

fig. 16 is a schematic diagram of a compensation circuit for over-current protection in twenty-first embodiment of the present application.

Specific embodiments of the present disclosure have been shown by way of the above drawings and will be described in more detail below. These drawings and the written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the disclosed concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the embodiments of the present application, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.

For some chips, in the practical application process, the working voltage or working current may be different due to the differences of chip processes or component combinations. The chip is typically provided with a specific drive current/voltage range, which may result in the chip not being operable when the current/voltage in the circuit does not reach the specific current/voltage range corresponding to the chip.

For example, for a certain chip, the specific working current is set to be 10mA, and when the current of the circuit where the chip is positioned is equal to or slightly more than 10mA, the chip can work normally; when the current of the circuit is less than 10mA, the chip can not work normally.

The compensation circuit and the integrated circuit provided by the application aim to solve the technical problems in the prior art.

The main conception of the scheme is as follows: the application provides a compensation circuit, which can detect a target circuit where a chip is located, and judge whether the current/voltage of the target circuit reaches a preset current/voltage value corresponding to the normal operation of the chip according to a detected working signal, wherein when the current/voltage of the target circuit reaches the preset current/voltage value, the chip can work normally, and compensation is not needed at the moment; when the current/voltage of the target circuit does not reach the preset current/voltage value, the chip cannot work normally, and the compensation circuit compensates the target circuit at the moment so that the current/voltage of the target circuit reaches the preset current/voltage value, and the chip can work normally. According to the scheme, the target circuit can be compensated in a self-adaptive mode, so that the chip can work normally under different conditions.

The following describes the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems in detail with specific embodiments. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.

Example 1

An embodiment of the present application provides a power supply signal compensation circuit, which is connected to a power supply branch of a target circuit and is used for detecting and adaptively compensating a power supply signal of the target circuit.

Fig. 1 is a schematic diagram of a compensation circuit according to an embodiment of the present application, and as shown in fig. 1, the compensation circuit includes: a detection module 10, a comparison module 20 and a compensation module 30;

the detection module 10 is connected to a power supply branch circuit for driving the target circuit to operate and the comparison module 20, and is used for detecting a first signal (i.e. an operating signal) of the power supply branch circuit of the target circuit and sending the operating signal to the comparison module 20;

the working signal may be specifically a working voltage signal or a working current signal, and the target circuit may be various chips or integrated circuits, for example, any one of a micro control unit MCU, a digital signal processing unit DSP, a microprocessor unit MPU, a system on chip SOC for consumable materials, or a power management system BMS. In addition, the target circuit may be a circuit including a chip, for example, a circuit including any one of a micro control unit MCU, a digital signal processing unit DSP, a microprocessor unit MPU, a system on chip SOC for consumable materials, or a power management system BMS.

The detection module 10 is connected with the target circuit to detect and obtain a working signal of the target circuit during working, and sends the working signal to the comparison module 20 for comparison processing to determine whether compensation is needed.

The comparing module 20 is configured to obtain a working signal and a second signal (i.e. an auxiliary signal), compare the working signal with the auxiliary signal to obtain a comparison result, and send a corresponding control signal to the compensating module 30 according to the comparison result, where the auxiliary signal is used for assisting in determining whether the working signal of the target circuit reaches a preset value;

the comparison module 20 may be configured to characterize a magnitude relation between the working signal and the auxiliary signal according to a comparison result obtained by the working signal and the auxiliary signal, where the magnitude relation may be configured to characterize whether the working signal of the target circuit reaches a preset value, so as to determine whether compensation is required, and after the comparison result is obtained, the comparison module 20 sends a corresponding control signal to the compensation module 30 according to the comparison result, so as to determine a current compensation strategy.

The compensation module 30 is used for determining a current compensation strategy of the target circuit according to the control signal. Specifically, when the control signal represents that compensation is required, the compensation module 30 executes corresponding compensation processing, so that the compensated working signal reaches a preset value; otherwise, the compensation module 30 does not perform the compensation process.

It can be understood that the compensation module may perform compensation of the working current or the working voltage on the target circuit, and the specific compensation mode may be selected according to the actual situation, which is not limited in this application.

According to the compensation circuit provided by the first embodiment, the detection module can detect the target circuit, the comparison module can compare signals according to the detected working signals so as to judge whether the working signals of the target circuit reach the corresponding preset values when the chip works normally, and the corresponding control signals are sent to the compensation module according to the comparison result, so that the compensation module can determine the corresponding compensation strategy according to the control signals. When the working signal of the target circuit reaches a preset value, the chip can work normally, and compensation is not needed at the moment; when the working signal of the target circuit does not reach the preset value, the chip cannot work normally, and compensation is needed for the target circuit at the moment, so that the working signal of the target circuit reaches the preset value, and the chip can work normally. The compensation circuit of the first embodiment can adaptively compensate the target circuit, thereby ensuring that the chip can work normally under different conditions.

Example two

In the second embodiment of the present application, the compensation circuit may compensate the target circuit by means of voltage detection.

The detection module can specifically detect the working voltage of the target circuit, namely the working signal detected by the detection module comprises a working voltage signal, and the auxiliary signal adopted by the comparison module during comparison comprises an auxiliary voltage signal; the control signal sent by the comparison module to the compensation module is used for representing whether the working voltage of the target circuit reaches a preset voltage value or not; the compensation module is specifically configured to compensate the target circuit when the control signal indicates that the working voltage of the target circuit does not reach the preset voltage value.

Specifically, the comparison module 20 includes a voltage comparator (Voltage Comparator, VC), and the compensation module 30 includes a switching tube; the voltage comparator can compare the magnitude of the working voltage signal and the magnitude of the auxiliary voltage signal, so that a comparison result is obtained. The switch tube can be a Metal-Oxide-Semiconductor Field-Effect Transistor (Metal-Oxide-semiconductor field effect transistor) or a triode.

The first input end of the voltage comparator is used for acquiring a working voltage signal, the second input end of the voltage comparator is used for acquiring an auxiliary voltage signal, and the output end of the voltage comparator is connected with the control end of the switching tube, so that after the voltage comparator obtains a comparison result through comparing the working voltage signal and the auxiliary voltage signal, the voltage comparator outputs a control signal corresponding to the comparison result to the control end of the switching tube through the output end.

Optionally, when the switching tube is a MOS tube, the control end of the switching tube is specifically corresponding to the gate of the MOS tube; when the switching tube is a triode, the control end of the switching tube is specifically corresponding to the base electrode of the triode.

Taking a switching tube as an MOS tube as an example, a specific principle that the voltage comparator outputs a control signal to the switching tube is explained.

The switching tube can be an N-type MOS tube; when the working voltage signal is smaller than the auxiliary voltage signal, the voltage comparator outputs a first control signal to the switching tube, and the first control signal is used for controlling the switching tube to enter a conducting state; when the working voltage signal is greater than or equal to the auxiliary voltage signal, the voltage comparator outputs a second control signal to the switching tube, and the second control signal is used for controlling the switching tube to enter a closed state; the first control signal may be a high-level signal, and the second control signal may be a low-level signal, based on the operating characteristics of the N-type MOS transistor.

In addition, the switching tube can also be a P-type MOS tube; when the working voltage signal is smaller than the auxiliary voltage signal, the voltage comparator outputs a third control signal to the switching tube, and the third control signal is used for controlling the switching tube to enter a conducting state; when the working voltage signal is greater than or equal to the auxiliary voltage signal, the voltage comparator outputs a fourth control signal to the switching tube, and the fourth control signal is used for controlling the switching tube to enter a closed state; the third control signal may be a low-level signal, and the fourth control signal may be a high-level signal, based on the operating characteristics of the P-type MOS transistor.

When the control signal output by the voltage comparator is used for controlling the switching tube to be conducted (namely, the first control signal or the third control signal), the switching tube enters a conducting state, and the switching tube compensates the target circuit.

In the second embodiment, the comparison module may compare the working voltage signal and the auxiliary voltage signal of the target circuit by using the voltage comparator, so as to obtain a comparison result, and send a corresponding control signal to the compensation module according to the comparison result, so as to control whether the switching tube in the compensation module compensates, thereby adaptively compensating the target circuit and ensuring that the target circuit can work normally under different conditions.

Example III

Based on the above-described embodiment two, in the embodiment three of the present application, the specific configuration of the compensation circuit will be explained in the case where the compensation circuit compensates the target circuit by means of voltage detection.

Fig. 2 is a schematic diagram of a specific circuit of a compensation circuit provided in the third embodiment of the present application, and as shown in fig. 2, the compensation circuit may be a VCC adaptive compensation circuit, specifically adopting a working principle of voltage detection and current compensation.

Referring to fig. 2, the detection module 10 includes a first resistor R1 and a second resistor R2, where the first resistor R1 is used to prevent the target circuit from being damaged due to excessive current input into the target circuit, so as to protect the target circuit. Based on the principle of parallel shunting, the second resistor R2 is used for shunting to detect the current input to the target circuit.

The resistance value of the second resistor R2 is larger than that of the first resistor R1; specifically, the current divided by the second resistor R2 is far smaller than the current divided by the first resistor R1, so that the working current required to be compensated is detected through the smaller current, the influence of the shunt on the working current is smaller, and the compensation precision can be improved.

Referring to fig. 2, one end of a first resistor R1 is connected to a power supply VCC, and the other end of the first resistor R1 is connected to a target circuit; one end of the second resistor R2 is connected to a path between the first resistor R1 and the power supply VCC, and the other end of the second resistor R2 is grounded; the other end of the second resistor R2 is also connected with a first input end (-polar input end or called negative pin) of a voltage comparator VC, the working voltage signal Va comprises a first voltage signal V1 corresponding to the second resistor R2, and the comparator is used for comparing the first voltage signal V1 with an auxiliary voltage signal Vb to obtain a comparison result; the input end of the switching tube is connected with the other end of the first resistor R1, and the output end of the switching tube is grounded.

When the switching tube is an MOS tube, the input end of the switching tube is specifically corresponding to the source electrode of the MOS tube, and the output end of the switching tube is specifically corresponding to the drain electrode of the MOS tube; when the switching tube is a triode, the base is connected with the output of the comparator to receive a comparison result, specifically, when the switching tube is an NPN triode, the input end of the switching tube is specifically corresponding to the collector of the triode, the output end of the switching tube is specifically corresponding to the emitter of the triode, and when the switching tube is a PNP triode, the input end of the switching tube is exactly opposite to the output end of the switching tube.

With the circuit structure shown in fig. 2, when the switching tube enters a conducting state, the other end of the first resistor R1 is grounded, and the switching tube performs current compensation on the target circuit, so that the compensated working current of the target circuit reaches a preset current value.

Alternatively, with the structure of fig. 2, the second input terminal (+polar input terminal or referred to as positive pin) of the voltage comparator may be connected to the other end of the first resistor R1, where the auxiliary voltage signal includes a second voltage signal (i.e., VCC1 in fig. 2) corresponding to the first resistor R1.

Taking the preset current value corresponding to the normal operation of the target circuit as 10mA for illustration, assuming that the current i1=10ma, r1=10Ω, r2=10kΩ, i2=10ua consumed by VCC in fig. 2, the first voltage signal v1=va=vcc-10ua=10kΩ=vcc-100 mV corresponding to R2.

If the current I3 consumed by the target circuit is greater than 10mA, the actual operating voltage VCC1< VCC-100mV of the target circuit, i.e. the first voltage signal is greater than the actual operating voltage of the target circuit, that is, the operating voltage signal is greater than the auxiliary voltage signal, so that the control signal output from the voltage comparator to the switching tube is used to control the switching tube to enter the off state (i.e. the second control signal or the fourth control signal), i.e. the switching tube will not generate the pull-down current I4.

In addition, if the current I3 consumed by the target circuit is less than 10mA, the actual operating voltage VCC1 of the target circuit is greater than VCC-100mV, that is, the first voltage signal is less than the actual operating voltage of the target circuit, that is, the operating voltage signal is less than the auxiliary voltage signal, so the control signal output from the voltage comparator to the switching tube is used to control the switching tube to enter the on state (that is, the first control signal or the third control signal), so that the other end of the first resistor R1 is grounded, thereby generating a pull-down current I4, I1=i3+i4, that is, the current consumed by VCC can be compensated to 10mA by adding an additional pull-down current I4, so that the target circuit can operate normally.

Alternatively, the second input of the comparator may be connected to a reference voltage source, and the auxiliary voltage signal includes a reference voltage signal provided by the reference voltage source, where the reference voltage signal may be vref=100 mV, for example, so that the comparator may also compare Va with Vref, thereby obtaining a corresponding comparison result. The specific process of comparison may refer to the foregoing and will not be described herein.

It will be understood that specific values of the physical parameters listed in the embodiment are only exemplary and not limiting to the scheme of the present application, and the specific values of the physical parameters may be different according to the different chip types, so that the settings of parameters such as resistance values in the corresponding circuits may be adaptively adjusted.

In this embodiment, based on the circuit structure shown in fig. 2, the compensation circuit can adaptively perform current compensation on the target circuit, so as to ensure that the target circuit can work normally under different conditions. In addition, the circuit has simple structural design and smaller actual measurement delay, so that the compensation response is more timely.

It will be appreciated that the circuit configuration shown in fig. 2 may be suitable for a specific scenario in which the input current to the target circuit needs to meet a preset current value.

Example IV

Based on the third embodiment, in the fourth embodiment of the present application, the compensation circuit may also adopt the operating principle of voltage detection+voltage compensation.

Fig. 3 is a schematic diagram of a specific circuit of the compensation circuit according to the fourth embodiment of the present application, as shown in fig. 3, where the difference between fig. 3 and fig. 2 is that the compensation module 30 further includes a third resistor R3.

The input end of the switching tube is connected with the other end of the first resistor through the third resistor, or the output end of the switching tube is grounded through the third resistor; when the switching tube enters a conducting state, the other end of the first resistor is grounded through the third resistor, so that the switching tube and the third resistor perform voltage compensation on the target circuit, the compensated working voltage of the target circuit reaches a preset voltage value, and the target circuit can work normally.

Example five

Based on the above-mentioned second embodiment, in the fifth embodiment of the present application, another compensation circuit is provided, and the compensation circuit may be a GND (ground) adaptive compensation circuit, specifically adopting the working principle of voltage detection and current compensation.

Fig. 4 is a schematic diagram of a specific circuit of a compensation circuit provided in the fifth embodiment of the present application, as shown in fig. 4, the detection module 10 includes a fourth resistor R4; the target circuit is connected with a power supply VCC, one end of a fourth resistor R4 is connected with the grounding end of the target circuit, and the other end of the fourth resistor R4 is grounded; a first input end of the voltage comparator VC is connected to a passage between the fourth resistor R4 and the target circuit, the working voltage signal Va comprises a ground voltage signal VSS1 corresponding to a ground end, a second input end of the voltage comparator is connected with a reference voltage source, and the auxiliary voltage signal Vb comprises a reference voltage signal Vref provided by the reference voltage source;

the voltage comparator is used for comparing the ground voltage signal VSS1 with the reference voltage signal Vref to obtain a comparison result; the input end of the switching tube is connected with a power supply, and the output end of the switching tube is connected to a passage between the fourth resistor and the target circuit.

With the circuit configuration shown in fig. 4, when the switching tube enters the on state, the power supply is grounded via the switching tube and the fourth resistor; the switching tube performs current compensation on the target circuit so that the compensated working current of the target circuit reaches a preset current value.

Specifically, the explanation is also given by taking the preset current value corresponding to the normal operation of the target circuit as 10mA, and it is assumed that r4=10Ω and vref=100 mV in fig. 4.

If the current I3 consumed by the target circuit is greater than 10mA, the ground voltage signal VSS1> vref=100 mV of the target circuit, i.e. the working voltage signal Va is greater than the auxiliary voltage signal Vb, so that the control signal output from the voltage comparator to the switching tube is used to control the switching tube to enter the off state (i.e. the second control signal or the fourth control signal), i.e. the switching tube will not generate the pull-down current I4.

In addition, if the current I3 consumed by the target circuit is less than 10mA, the ground voltage signal VSS1< vref=100 mV of the target circuit, i.e. the operating voltage signal Va is less than the auxiliary voltage signal Vb, so the control signal output from the voltage comparator to the switching tube is used to control the switching tube to enter the on state (i.e. the first control signal or the third control signal), so that the power supply is grounded via the switching tube and the fourth resistor R4, thereby generating the pull-down current I4, I1=i3+i4, i.e. the current consumed by VCC can be compensated to 10mA by adding the additional pull-down current I4.

In this embodiment, based on the circuit structure shown in fig. 4, the compensation circuit can adaptively perform current compensation on the target circuit, so as to ensure that the target circuit can work normally under different conditions. In addition, the circuit has simple structural design and smaller actual measurement delay, so that the compensation response is more timely.

It will be appreciated that the circuit configuration shown in fig. 4 may be suitable for a specific scenario in which the output current through the target circuit needs to meet a preset current value.

Example six

Based on the fifth embodiment, in the sixth embodiment of the present application, the compensation circuit may also adopt the operating principle of voltage detection+voltage compensation.

Fig. 5 is a schematic diagram of a specific circuit of the compensation circuit provided in the sixth embodiment of the present application, as shown in fig. 5, where the difference between fig. 5 and fig. 4 is that the compensation module 30 further includes a fifth resistor R5;

the input end of the switching tube is connected with a power supply through a fifth resistor R5, or the output end of the switching tube is connected to a passage between the fourth resistor and a target circuit through the fifth resistor;

when the switching tube enters a conducting state, the power supply is grounded through the switching tube, the fifth resistor and the fourth resistor; therefore, the switching tube and the fifth resistor perform voltage compensation on the target circuit, so that the compensated working voltage of the target circuit reaches a preset voltage value, and the target circuit can work normally.

Example seven

Based on the above-mentioned second embodiment, in the seventh embodiment of the present application, another compensation circuit is provided, and the compensation circuit may be another VCC adaptive compensation circuit, specifically adopting the working principle of voltage detection and current compensation.

Fig. 6 is a schematic diagram of a specific circuit of a compensation circuit provided in the seventh embodiment of the present application, as shown in fig. 6, the detection module 10 includes a sixth resistor R6; the target circuit is connected with the power supply VCC, one end of the sixth resistor R6 is connected to a passage between the power supply and the target circuit, and the other end of the sixth resistor R6 is grounded; a first input end of the voltage comparator VC is connected with one end of a sixth resistor R6, the working voltage signal Va comprises a third voltage signal V3 corresponding to the sixth resistor R6, a second input end of the voltage comparator VC is connected with a reference voltage source, and the auxiliary voltage signal Vb comprises a reference voltage signal Vref provided by the reference voltage source;

the voltage comparator is used for comparing the third voltage signal V3 with the reference voltage signal Vref to obtain a comparison result; the input end of the switching tube is connected to a passage between the power supply and the target circuit, and the output end of the switching tube is grounded.

With the circuit configuration shown in fig. 6, when the switching tube enters the on state, the power supply is grounded via the switching tube; the switching tube performs current compensation on the target circuit so that the compensated working current of the target circuit reaches a preset current value.

Specifically, the explanation is also given taking the preset current value corresponding to the normal operation of the target circuit as 10mA as an example, and it is assumed that r6=10kΩ and vref=100 mV in fig. 6. In addition, i1=10ma, I2 in fig. 6 is designed to be a value much smaller than I1, for example i2=i1/x, x >200. Therefore, the working current to be compensated is detected through smaller current, the influence of shunt on the working current is smaller, and the compensation precision can be improved. For example, assuming x=1000, i2=i1/1000=0.01ma=10ua, v3=i2×r6=10kΩ=0.01ma=100 mV.

If I1>10mA, I2>10ua, V3>100mv, i.e., V3> Vref, that is, the operating voltage signal is greater than the auxiliary voltage signal, so the control signal output from the voltage comparator to the switching tube is used to control the switching tube to enter the off state (i.e., the second control signal or the fourth control signal), i.e., the switching tube will not generate the pull-down current I4.

In addition, if I1<10mA, I2<10ua, V3<100mv, i.e., V3< Vref, that is, the working voltage signal is smaller than the auxiliary voltage signal, so the control signal output from the voltage comparator to the switching tube is used to control the switching tube to enter the on state (i.e., the first control signal or the third control signal), so that the power supply is grounded via the switching tube, and a pull-down current I4 is generated, I1=i3+i4, i.e., the current consumed by VCC can be compensated to 10mA by adding an additional pull-down current I4, so that the target circuit can work normally.

In this embodiment, based on the circuit structure shown in fig. 6, the compensation circuit can adaptively compensate the target circuit, so as to ensure that the target circuit can work normally under different conditions. In addition, the circuit has simple structural design and smaller actual measurement delay, so that the compensation response is more timely.

Example eight

Based on the above-described embodiment seven, in the eighth embodiment of the present application, the compensation circuit may also adopt the operation principle of voltage detection+voltage compensation.

Fig. 7 is a schematic diagram of a specific circuit of the compensation circuit according to the eighth embodiment of the present application, as shown in fig. 7, where the difference between fig. 7 and fig. 6 is that the compensation module 30 further includes a seventh resistor R7;

the input end of the switching tube is connected to a passage between the power supply and the target circuit through a seventh resistor R7, or the output end of the switching tube is grounded through the seventh resistor;

when the switching tube enters a conducting state, the power supply is grounded through the switching tube and the seventh resistor; therefore, the switching tube and the seventh resistor perform voltage compensation on the target circuit, so that the compensated working voltage of the target circuit reaches a preset voltage value, and the target circuit can work normally.

Example nine

In the ninth embodiment of the present application, the compensation circuit may compensate the target circuit by means of current detection. The ninth embodiment is different from the second embodiment in that the type of the operation signal for detecting the target circuit is different.

The detection module is used for detecting the working signals, wherein the working signals detected by the detection module comprise working current signals, and the auxiliary signals adopted by the comparison module during comparison comprise auxiliary current signals; the control signal sent by the comparison module to the compensation module is used for representing whether the working current of the target circuit reaches a preset current value; the compensation module is specifically configured to compensate the target circuit when the control signal characterizes that the working current of the target circuit does not reach a preset current value.

Specifically, the comparison module 20 includes a current comparator (Current Comparator, CC), and the compensation module includes a switching tube; the first input end of the current comparator is used for acquiring a working current signal, the second input end of the current comparator is used for acquiring an auxiliary current signal, and the output end of the current comparator is connected with the control end of the switching tube; the current comparator is used for comparing the working current signal with the auxiliary current signal and outputting a corresponding control signal to the control end of the switching tube according to the comparison result.

Optionally, the switching tube comprises an N-type MOS tube; when the working current signal is smaller than the auxiliary current signal, the current comparator outputs a first control signal to the switching tube, and the first control signal is used for controlling the switching tube to enter a conducting state; when the working current signal is greater than or equal to the auxiliary current signal, the current comparator outputs a second control signal to the switching tube, and the second control signal is used for controlling the switching tube to enter a closed state; when the switching tube is in a conducting state, the switching tube compensates the target circuit.

Optionally, the switching tube comprises a P-type MOS tube; when the working current signal is smaller than the auxiliary current signal, the current comparator outputs a third control signal to the switching tube, and the third control signal is used for controlling the switching tube to enter a conducting state; when the working current signal is greater than or equal to the auxiliary current signal, the current comparator outputs a fourth control signal to the switching tube, and the fourth control signal is used for controlling the switching tube to enter a closed state; when the switching tube is in a conducting state, the switching tube compensates the target circuit.

It can be understood that, compared with the embodiment, the working principle of other circuit elements except for the type of the working signal is specifically referred to the content in the second embodiment, and will not be described herein.

Examples ten

Based on the above-described embodiment nine, in embodiment ten of the present application, a specific configuration of the compensation circuit will be explained in the case where the compensation circuit compensates the target circuit by means of current detection.

Fig. 8 is a schematic diagram of a specific circuit of a compensation circuit according to the tenth embodiment of the present application, and as shown in fig. 8, the compensation circuit may be a VCC adaptive compensation circuit, specifically adopting the working principle of current detection and current compensation.

The detection module comprises a first resistor and a second resistor, the resistance value of the second resistor is larger than that of the first resistor, and the comparison module further comprises an eighth resistor R8.

One end of the first resistor is connected with a power supply, and the other end of the first resistor is connected with a target circuit; one end of the second resistor is connected to a passage between the first resistor and the power supply, and the other end of the second resistor is grounded; the other end of the second resistor is also connected with the first input end of the current comparator, and the working current signal Ia comprises a first current signal corresponding to the second resistor. The second input end of the current comparator is connected with the other end of the first resistor through an eighth resistor, and the auxiliary current signal Ib comprises a second current signal corresponding to the first resistor; alternatively, the second input end of the current comparator is connected with the reference voltage source through the eighth resistor, and the auxiliary current signal comprises a reference current signal provided by the reference voltage source; the current comparator is used for comparing the first current signal with the second current signal or the reference current signal to obtain a comparison result; the input end of the switching tube is connected with the other end of the first resistor, and the output end of the switching tube is grounded.

With the circuit structure shown in fig. 8, when the switching tube enters a conducting state, the other end of the first resistor is grounded, and the switching tube performs current compensation on the target circuit, so that the compensated working current of the target circuit reaches a preset current value.

It can be understood that, compared with the third embodiment, the working principle of other circuit elements except the type of the working signal and the comparator can be specifically referred to the content in the third embodiment, and the description thereof is omitted herein.

Example eleven

Based on the above-described embodiment ten, in the eleventh embodiment of the present application, the compensation circuit may also employ the operation principle of current detection+voltage compensation.

Fig. 9 is a schematic diagram of a specific circuit of a compensation circuit according to an eleventh embodiment of the present application, and as shown in fig. 9, fig. 9 is different from fig. 8 in that the compensation module 30 further includes a third resistor R3.

Example twelve

Based on the above-described embodiment nine, in the embodiment twelve of the present application, another compensation circuit is provided, which may be a GND (ground) adaptive compensation circuit, specifically employing the operation principle of current detection+current compensation.

Fig. 10 is a schematic diagram of a specific circuit of a compensation circuit according to the twelfth embodiment of the present application, as shown in fig. 10, the detection module includes a fourth resistor, and the comparison module further includes an eighth resistor R8;

the target circuit is connected with a power supply, one end of the fourth resistor is connected with the grounding end of the target circuit, and the other end of the fourth resistor is grounded; the first input end of the current comparator is connected to a passage between the fourth resistor and the target circuit, the working current signal Ia comprises a grounding current signal corresponding to the grounding end, the second input end of the current comparator is connected with a reference voltage source through an eighth resistor, and the auxiliary current signal Ib comprises a reference current signal provided by the reference voltage source; the current comparator is used for comparing the grounding current signal with the reference current signal to obtain a comparison result; the input end of the switching tube is connected with a power supply, and the output end of the switching tube is connected to a passage between the fourth resistor and the target circuit.

With the circuit configuration shown in fig. 10, when the switching tube enters the on state, the power supply is grounded via the switching tube and the fourth resistor; the switching tube performs current compensation on the target circuit so that the compensated working current of the target circuit reaches a preset current value.

It can be understood that, compared with the fifth embodiment, the working principle of other circuit elements except for the type of the working signal and the type of the comparator can be specifically referred to in the fifth embodiment, and the description thereof will not be repeated here.

Example thirteen

Based on the above-described embodiment twelve, in the thirteenth embodiment of the present application, the compensation circuit may also adopt the operation principle of current detection+voltage compensation.

Fig. 11 is a schematic diagram of a specific circuit of a compensation circuit according to the thirteenth embodiment of the present application, as shown in fig. 11, where the difference between fig. 11 and fig. 10 is that the compensation module further includes a fifth resistor R5;

the input end of the switching tube is connected with a power supply through a fifth resistor, or the output end of the switching tube is connected to a passage between the fourth resistor and a target circuit through the fifth resistor; when the switching tube enters a conducting state, the power supply is grounded through the switching tube, the fifth resistor and the fourth resistor; the switching tube and the fifth resistor perform voltage compensation on the target circuit, so that the compensated working voltage of the target circuit reaches a preset voltage value.

Examples fourteen

Based on the above-mentioned ninth embodiment, in the fourteenth embodiment of the present application, another compensation circuit is provided, and the compensation circuit may be another VCC adaptive compensation circuit, specifically adopting the working principle of current detection+current compensation.

Fig. 12 is a schematic diagram of a specific circuit of a compensation circuit according to a fourteenth embodiment of the present application, where, as shown in fig. 12, the detection module includes a sixth resistor R6, and the comparison module further includes an eighth resistor R8;

the target circuit is connected with the power supply, one end of the sixth resistor is connected to a passage between the power supply and the target circuit, and the other end of the sixth resistor is grounded; the first input end of the current comparator is connected with one end of the sixth resistor, the working current signal Ia comprises a third current signal corresponding to the sixth resistor, the second input end of the current comparator is connected with the reference voltage source through the eighth resistor, and the auxiliary current signal Ib comprises a reference current signal provided by the reference voltage source; the current comparator is used for comparing the third current signal with the reference current signal to obtain a comparison result; the input end of the switching tube is connected to a passage between the power supply and the target circuit, and the output end of the switching tube is grounded.

With the circuit configuration shown in fig. 12, when the switching tube enters the on state, the power supply source is grounded via the switching tube; the switching tube performs current compensation on the target circuit so that the compensated working current of the target circuit reaches a preset current value.

It can be understood that, compared with the seventh embodiment, the operation principle of other circuit elements except for the type of the operation signal and the type of the comparator in the fourteenth embodiment can be specifically referred to in the seventh embodiment, and will not be described herein.

Example fifteen

Based on the above-described fourteen embodiments, in the fifteen embodiments of the present application, the compensation circuit may also adopt the operation principle of current detection+voltage compensation.

Fig. 13 is a schematic diagram of a specific circuit of a compensation circuit according to an embodiment fifteen of the present application, as shown in fig. 13, where the difference between fig. 13 and fig. 12 is that the compensation module further includes a seventh resistor R7;

the input end of the switching tube is connected to a passage between the power supply and the target circuit through a seventh resistor, or the output end of the switching tube is grounded through the seventh resistor; when the switching tube enters a conducting state, the power supply is grounded through the switching tube and the seventh resistor; the switching tube and the seventh resistor perform voltage compensation on the target circuit, so that the compensated working voltage of the target circuit reaches a preset voltage value.

Examples sixteen

Based on the above embodiments, in embodiment sixteen of the present application, an integrated circuit is provided.

Fig. 14 is a schematic diagram of an integrated circuit according to a sixteenth embodiment of the present application, where, as shown in fig. 14, the integrated circuit includes the compensation circuit and the target circuit according to the above embodiments, and the compensation circuit is connected to the target circuit and is configured to perform current compensation or voltage compensation on the target circuit by using a current detection or voltage detection method.

Optionally, the integrated circuit includes any one of a micro control unit MCU, a digital signal processing unit DSP, a microprocessor unit MPU, a system on chip SOC for consumable materials, or a power management system BMS; the target circuit includes a PWM (Pulse Width Modulation ) control circuit.

Example seventeen

In seventeenth embodiment of the present application, when the target circuit includes a PWM control circuit, in the automatic commutation process of PWM, abrupt change of PWM may cause severe change of current and further cause shaking of motor rotation, so that the motor can smoothly and smoothly run in the commutation process, and in the commutation process of the motor, current compensation may be performed through a compensation circuit. The PWM pulse width modulation can control the current compensation module to perform phase change compensation after phase change, and filter current fluctuation. In order to compensate for voltage drop in the commutation process, the PWM output is directly set to an effective level immediately after the commutation, and then the current after the commutation is always detected until the current after the commutation is recovered to a current value before the commutation, and then the PWM is recovered to a value of the PWM before the commutation.

Example eighteen

In the seventeenth embodiment of the present application, the compensation circuit may also be applied to over-current protection of the PWM control circuit.

Specifically, the compensation circuit is taken as an example of the VCC adaptive compensation circuit in the third embodiment, and fig. 15 is a schematic diagram of the compensation circuit for performing the over-current protection in the eighteenth embodiment of the present application, as shown in fig. 15, where, when the compensation circuit is applied to the PWM control circuit, VCC is VCC in PWM, and in addition, the first input terminal and the second input terminal of the voltage comparator are inverted, that is, the working voltage signal is connected to the second input terminal, and the auxiliary voltage signal is connected to the first input terminal, so that when the working current of the target circuit is larger, the compensation module 30 shares the current, thereby performing the over-current protection on the target circuit.

Examples nineteenth

In nineteenth embodiment of the present application, the compensation circuit can also be used as a load driving circuit.

In the load driving circuit, for the driving port with the set power supply voltage and power supply current, specific working current is different due to errors of different load manufacturing processes and precision, so that overheat risks of the load are avoided when the driving current is high, the service life of components is influenced, and the load driving circuit can be arranged at the driving interface and used for power supply discharge compensation.

Specifically, the load driving circuit includes a detection module, a comparison module and a compensation module, where the detection module includes a power supply module, which may also be referred to as a load power supply module, and a sensing module, the driving interface VCC is connected to the load power supply module, the load power supply module is connected to the load, the driving interface provides a driving electrical signal of the load, the driving electrical signal is transmitted to the load through the load power supply module, and the driving load works, where the driving interface VCC corresponds to VCC in the VCC adaptive compensation circuit, the load corresponds to a target circuit in the compensation circuit, and connection and working of the remaining modules are referred to in embodiments 1-4, 7, 10, 11, and 14 (corresponding embodiments are VCC sensing).

In a preferred manner, reference is made to example 3, which is not described in detail herein. Through the electric signal detection of the drive port, the drive current of a proper load and components can be adaptively set, the load and the components are protected from normal operation, and the risk of overcurrent is avoided.

The load driving circuit can be applied to an IO interface of the MCU, wherein IO_VCC and IO_GND are arranged in the IO interface, IO_VCC is used for providing driving voltage, and IO_GND is used for providing reference grounding voltage. Specifically, the load driving circuit is used for driving a load, in the IO interface of the MCU, the IO interface with the supply voltage and the supply current is set for driving the load, and because of the errors of different load manufacturing processes and precision, the specific working current of the load can be different, therefore, in order to avoid overheat risks of the load caused by higher driving current, the service life of components is influenced, the load driving circuit for driving the supply bleeder circuit can be set at the IO interface, and specifically, the load driving circuit comprises: the detection module comprises a power supply module, a comparison module and a compensation module, wherein the detection module comprises a load power supply module and a sensing module, IO_VCC of an IO interface is connected with the load power supply module, the load power supply module is connected with a load, the IO interface provides a driving electric signal of the load, the driving electric signal is transmitted to the load through the load power supply module to drive the load to work, the compensation module is connected with IO_GND, the IO_VCC corresponds to VCC in the VCC self-adaptive compensation circuit, the load corresponds to a target circuit in the compensation circuit, and other modules are connected and work, and reference embodiments 1-4, 7, 10, 11 and 14 (corresponding embodiments are VCC sensing).

In a preferred manner, reference is made to example 3, which is not described in detail herein. Through the electrical signal detection of the IO interface of the MCU, the driving current of a proper load and components can be adaptively set, the load and the components are protected from normal operation, and the risk of overcurrent is avoided.

For example, the load externally connected to the MCU may be, for example, a MCU driving a buzzer, and if the power supply voltage provided by the MCU is 5V and the starting voltage of the MCU driving the buzzer is 3.3V, the resistor in the compensation module 30 in the compensation circuit needs to share the voltage of 1.7V.

Example twenty

In embodiment twenty of the present application, the compensation circuit can also be used as a power supply protection circuit, and reference is made to fig. 16.

Specifically, in the process of charging the load, as the voltage and the current of the power supply are fixed and the rated currents of different loads are inconsistent, the load may face the risk of burning caused by overcurrent, and the power supply protection circuit is connected with the power supply and the load to realize current discharge so as to protect the load.

Specifically, the power supply protection circuit includes: the detection module comprises a power supply module 101 and a sensing module 102, wherein a power supply end VCC of the power supply is connected with the power supply module, the power supply module is connected with a load input, the power supply module receives an electric signal for charging the load, the power supply end VCC corresponds to VCC in the VCC self-adaptive compensation circuit, the load corresponds to a target circuit in the compensation circuit, and other modules are connected and work specifically, and reference embodiments 1-4, 7, 10, 11 and 14 (VCC sensing is adopted in corresponding embodiments). In a preferred manner, reference is made to example 3. Through the detection of the electric signal of the power supply end VCC of the power supply, proper load charging current can be adaptively set, the load can be protected from normal operation, and the risk of overcurrent is avoided. The power protection circuit may also be used for protection of the battery pack in a power management system that is electrically connected to the battery pack.

Specifically, in the process of charging the battery pack, for example, the lithium battery is charged, because the voltage and the current of the power supply are fixed, and the rated current of different lithium batteries is inconsistent due to the reasons of use frequency, material deterioration and the like, the battery pack may face the risk of burning out due to overcurrent, and the power supply protection circuit is connected with the charging circuit and the battery pack to realize the current discharge or the voltage division so as to protect the battery pack.

Specifically, the power supply protection circuit includes: the detection module comprises a power supply module, which can also be called a charging circuit, and a sensing module, wherein a power supply end VCC of the power supply is connected with the charging circuit, the charging circuit is connected with the input of the battery pack, the charging circuit receives an electric signal for charging the battery pack, the power supply end VCC corresponds to VCC in the VCC self-adaptive compensation circuit, the battery pack corresponds to a target circuit in the compensation circuit, and the connection and the working of the other modules are specific, and reference examples 1-4, 7, 10, 11 and 14 (the corresponding examples are VCC sensing). In a preferred manner, reference is made to example 3. Through the electrical signal detection of the power supply end VCC of the power supply, the charging power supply of a proper battery pack can be adaptively set, the protection load can work normally, and the risk of overcurrent or overvoltage is avoided.

Example twenty-one

In a twenty-first embodiment of the present application, the compensation circuit may also be used as a protection circuit for the consumable chip.

Specifically, the consumable chip detachably installs in the ink horn, and ink horn detachably installs in the printer, and consumable chip joinable printer power supply end VCC and printer reference ground end GND because the voltage and the electric current that provide by the printer are fixed, and the consumable chip of being supplied with power by the printer probably faces the risk that overflows and burn out, discharges the electric current through protection circuit to protection consumable chip can normally work, thereby avoids burning out or influencing life.

The embodiment designs a protection circuit of a consumable chip, which comprises a detection module, a comparison module and a compensation module, wherein a power supply end VCC of a printer is connected with the detection module, the detection module is also connected with the input of the consumable chip, a reference ground GND of the printer is connected with the compensation module, the power supply module receives a signal for driving the consumable chip to drive the consumable chip to work,

the power supply terminal VCC of the printer corresponds to VCC in the VCC adaptive compensation circuit, the consumable chip corresponds to the target circuit in the compensation circuit, and the connection and operation of the remaining modules are specific, and reference is made to embodiments 3, 7, 10, and 14, and in a preferred manner, reference may be made to embodiment 3.

Therefore, through the detection of the voltage signal of the VCC power supply end, the current compensation can be performed on the consumable chip in a self-adaptive manner, so that the target circuit can work normally under different conditions. In addition, the circuit has simple structural design and smaller actual measurement delay, so that the compensation response is more timely.

Alternatively, the reference voltage GND of the printer is electrically connected to the interface of the consumable chip, the reference voltage GND of the printer corresponds to GND in the GND adaptive compensation circuit, the consumable chip corresponds to the target circuit in the compensation circuit, and the connection and working of the remaining modules are specific, and reference is made to embodiments 5 and 12, and in a preferred manner, reference may be made to embodiment 5.

Therefore, through the detection of the GND end electric signal, the consumable chip can be subjected to current compensation in a self-adaptive manner, so that the target circuit can work normally under different conditions. In addition, the circuit has simple structural design and smaller actual measurement delay, so that the compensation response is more timely.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An adaptive compensation circuit, coupled to a supply branch of a target circuit, for detecting and adaptively compensating a supply signal of the target circuit, comprising: the device comprises a detection module, a comparison module and a compensation module;

the detection module is connected to a power supply branch circuit for driving the target circuit to work and the comparison module, and is used for detecting a first signal of the power supply branch circuit of the target circuit and sending the first signal to the comparison module; wherein the detection module is grounded;

The compensation module comprises a switching tube, a control end of the switching tube is connected to the comparison module, a control signal is received and used for determining a compensation strategy of the target circuit according to the control signal, the switching tube carries out shunt and discharge control on the target circuit, and the target circuit is protected to work normally;

when the comparison module compares that the first signal is smaller than the second signal, the switching tube is controlled to be conducted;

when the comparison module compares that the first signal is larger than the second signal, the switching tube is controlled to be closed;

wherein the sum of the bleeder current of the switching tube and the current of the target circuit is the current provided by the driving interface VCC.

2. The adaptive compensation circuit of claim 1 wherein the first signal comprises an operating voltage signal and the second signal comprises an auxiliary voltage signal;

the comparison module comprises a voltage comparator, and the compensation module comprises a switching tube;

the first input end of the voltage comparator is used for acquiring the working voltage signal, the second input end of the voltage comparator is used for acquiring the auxiliary voltage signal, and the output end of the voltage comparator is connected with the control end of the switching tube.

3. The adaptive compensation circuit of claim 2 wherein,

the control signal is used for representing whether the working voltage of the target circuit reaches a preset voltage value;

the voltage comparator is used for comparing the working voltage signal with the auxiliary voltage signal and outputting a corresponding control signal to the control end of the switching tube according to a comparison result;

the compensation module is specifically configured to compensate the target circuit when the control signal characterizes that the working voltage of the target circuit does not reach the preset voltage value.

4. The adaptive compensation circuit of claim 3 wherein the detection module comprises a fourth resistor;

the target circuit is connected with a power supply, one end of the fourth resistor is connected with the grounding end of the target circuit, and the other end of the fourth resistor is grounded;

the first input end of the voltage comparator is connected to a passage between the fourth resistor and the target circuit, the working voltage signal comprises a grounding voltage signal corresponding to the grounding end, the second input end of the voltage comparator is connected with a reference voltage source, and the auxiliary voltage signal comprises a reference voltage signal provided by the reference voltage source;

The input end of the switching tube is connected with the power supply, and the output end of the switching tube is connected to a passage between the fourth resistor and the target circuit.

5. The adaptive compensation circuit of claim 4, wherein,

the voltage comparator is used for comparing the grounding voltage signal with the reference voltage signal to obtain a comparison result, and outputting a control signal for controlling the switching tube to be turned on or turned off to a control end of the switching tube according to the comparison result;

when the switching tube enters a conducting state, the power supply is grounded through the switching tube and the fourth resistor;

and the switching tube performs current compensation on the target circuit so that the compensated working current of the target circuit reaches a preset current value.

6. The adaptive compensation circuit of claim 4 wherein the compensation module further comprises a fifth resistor;

the input end of the switching tube is connected with the power supply through the fifth resistor, or the output end of the switching tube is connected to a path between the fourth resistor and the target circuit through the fifth resistor.

7. The adaptive compensation circuit of claim 1 wherein the first signal comprises an operating current signal and the second signal comprises an auxiliary current signal;

the comparison module comprises a current comparator, and the compensation module comprises a switching tube;

the first input end of the current comparator is used for acquiring the working current signal, the second input end of the current comparator is used for acquiring the auxiliary current signal, and the output end of the current comparator is connected with the control end of the switching tube.

8. The adaptive compensation circuit of claim 7 wherein,

the control signal is used for representing whether the working current of the target circuit reaches a preset current value;

the current comparator is used for comparing the working current signal with the auxiliary current signal and outputting a corresponding control signal to the control end of the switching tube according to a comparison result;

the compensation module is specifically configured to compensate the target circuit when the control signal characterizes that the working current of the target circuit does not reach the preset current value.

9. The adaptive compensation circuit of claim 8 wherein,

The detection module comprises a fourth resistor, and the comparison module further comprises an eighth resistor;

the first input end of the current comparator is connected to a passage between the fourth resistor and the target circuit, the working current signal comprises a grounding current signal corresponding to the grounding end, the second input end of the current comparator is connected with a reference voltage source through the eighth resistor, and the auxiliary current signal comprises a reference current signal provided by the reference voltage source;

10. The adaptive compensation circuit of claim 7, wherein the current comparator is configured to compare a ground current signal with a reference current signal to obtain a comparison result, and output a control signal for controlling the switching tube to be turned on or off to a control terminal of the switching tube according to the comparison result;

When the switching tube enters a conducting state, the power supply is grounded through the switching tube and a fourth resistor;

11. The adaptive compensation circuit of claim 7 wherein the compensation module further comprises a fifth resistor;

the input end of the switching tube is connected with a power supply through the fifth resistor, or the output end of the switching tube is connected to a passage between a fourth resistor and the target circuit through the fifth resistor.

12. The adaptive compensation circuit of any one of claims 2-11 wherein the switching tube comprises an N-type MOS tube or a P-type MOS tube.

13. A protection circuit for consumable chips, comprising an adaptive compensation circuit according to any one of claims 2-3 or 6-9;

the consumable chip is mounted on the ink box, the ink box is mounted on the printer, the consumable chip is connected with the self-adaptive compensation circuit, and the self-adaptive compensation circuit is connected with the reference voltage GND of the printer.

14. An integrated circuit comprising an adaptive compensation circuit according to any one of claims 1-11 and a target circuit, the adaptive compensation circuit being coupled to the target circuit for compensating the target circuit.