Chip resistance trimming circuit and chip

Abstract

The utility model discloses a chip resistance trimming circuit and a chip, and relates to the technical field of chips. The chip resistance trimming circuit disclosed by the utility model comprises a reference generation module, a voltage sampling module and a trimming module, the voltage sampling module is connected with the reference generation module and the trimming module, the trimming module is further connected with the reference generation module, and the reference generation module is further connected with the chip; the voltage sampling module is used for sampling the initial protection voltage output to the chip by the reference generation module; and the trimming module is used for calculating a required trimming resistance value in the reference generation module according to the initial protection voltage, and adjusting the resistance value in the reference generation module according to the trimming resistance value, so that the trimmed resistance value is matched with the resistance value of the chip. According to the circuit, the problem that the precision of technical simulation for realizing different protection voltage parameters by adjusting the resistance value through laser trimming is greatly different from the actual precision is solved.

Description

Technical Field

[0001] This application relates to the field of chip technology, and in particular to a chip resistance adjustment circuit and chip. Background Technology

[0002] Due to the diverse market demands for lithium battery protection chips, a product needs to be able to adjust the resistance value via laser trimming to achieve different protection voltage parameters. However, for the same protection voltage parameter, different chips need to select different trimming resistor values ​​based on their own characteristics. The current method is to simulate by directly disconnecting the FUSE in the circuit diagram. This method can only select one resistance value, which will cause the simulation accuracy to differ significantly from the actual value. Utility Model Content

[0003] The main purpose of this application is to propose a resistor adjustment circuit, which aims to solve the problem that the simulation accuracy of existing technologies that adjust resistance values ​​by laser to achieve different protection voltage parameters differs significantly from the actual situation.

[0004] To achieve the above objectives, this application proposes a chip resistance adjustment circuit, which includes:

[0005] Reference generation module, voltage sampling module, and adjustment module;

[0006] The voltage sampling module is connected to the reference generation module and the adjustment module. The adjustment module is also connected to the reference generation module, and the reference generation module is also connected to the chip.

[0007] The voltage sampling module is used to sample the initial protection voltage output to the chip by the reference generation module;

[0008] The adjustment module is used to calculate the required adjustment resistance value in the reference generation module based on the initial protection voltage, and adjust the resistance value in the reference generation module according to the adjustment resistance value so that the adjusted resistance value matches the resistance value of the chip.

[0009] Optionally, the reference generation module includes: a current source and a resistor unit with adjustable resistance;

[0010] The resistor unit is connected to the current source, the adjustment module, the voltage sampling module, and the chip respectively, and the current source is connected to the voltage sampling module.

[0011] The current source is used to output the reference generation module to the chip through the resistor unit with adjusted resistance value.

[0012] Optionally, the adjustment module includes: a calculation unit, a control unit, and an execution unit;

[0013] The control unit is connected to the calculation unit and the execution unit respectively; the calculation unit is connected to the voltage sampling module; and the execution unit is connected to the resistor unit.

[0014] The calculation unit is used to calculate the adjustment value based on the initial voltage value and transmit the adjustment value to the control unit;

[0015] The control unit is used to receive the adjustment value and output a corresponding control signal to the execution unit according to the adjustment value;

[0016] The execution unit is used to receive the control signal and perform corresponding actions according to the control signal to adjust the resistance value of the resistor unit.

[0017] Optionally, the resistor unit includes multiple resistors;

[0018] The resistors are connected in series.

[0019] Optionally, the execution unit includes multiple switches;

[0020] The number of switches is the same as the number of resistors in the resistor unit;

[0021] The multiple switches are connected in series.

[0022] The control unit is used to receive the adjustment value output by the calculation module, and output a corresponding control signal to the plurality of switches according to the adjustment value;

[0023] The plurality of switches are used to receive the control signal and perform corresponding actions according to the control signal to adjust the resistance value of the resistor unit.

[0024] In addition, to achieve the above objectives, this application also proposes a chip that includes the chip resistance adjustment circuit described above.

[0025] This application discloses a chip resistance adjustment circuit and chip, relating to the field of chip technology. The disclosed chip resistance adjustment circuit includes: a reference generation module, a voltage sampling module, and an adjustment module. The voltage sampling module is connected to the reference generation module and the adjustment module, and the adjustment module is also connected to the reference generation module, which is also connected to the chip. The voltage sampling module is used to sample the initial protection voltage output from the reference generation module to the chip. The adjustment module is used to calculate the required adjustment resistance value in the reference generation module based on the initial protection voltage, and adjust the resistance value in the reference generation module according to the adjustment resistance value, so that the adjusted resistance value matches the resistance value of the chip. This application, by adjusting the resistance value of the reference module according to the initial voltage value of the chip using the above circuit, solves the problem that the simulation accuracy of existing technologies that adjust resistance values ​​using laser adjustment to achieve different protection voltage parameters differs significantly from reality. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a flowchart illustrating the first embodiment of the resistor adjustment method of this application;

[0028] Figure 2 This is a flowchart illustrating the second embodiment of the resistor adjustment method of this application;

[0029] Figure 3 This is a flowchart illustrating the third embodiment of the resistor adjustment method of this application.

[0030] Explanation of icon numbers:

[0031]

[0032] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0034] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0036] This application provides a chip resistance adjustment circuit, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the chip resistance adjustment circuit of this application.

[0037] In this embodiment, the chip resistance adjustment circuit includes: a reference generation module 1, a voltage sampling module 2, and an adjustment module 3;

[0038] The voltage sampling module 2 is connected to the reference generation module 1 and the adjustment module 3. The adjustment module 3 is also connected to the reference generation module 1. The reference generation module 1 is also connected to the chip.

[0039] The voltage sampling module 2 is used to sample the initial protection voltage output to the chip by the reference generation module 1;

[0040] The adjustment module 3 is used to calculate the required adjustment resistance value in the reference generation module 1 based on the initial protection voltage, and adjust the resistance value in the reference generation module 1 according to the adjustment resistance value so that the adjusted resistance value matches the resistance value of the chip.

[0041] Understandably, the reference generation module 1 is a key part of the chip, mainly responsible for providing stable and accurate reference signals for other modules inside the chip.

[0042] Understandably, the initial protection voltage is the voltage at which the chip transitions from standby to startup.

[0043] It should be noted that the voltage sampling module 2 can be an operational amplifier, an analog-to-digital converter, or a Hall sensor, etc., and this embodiment does not limit it.

[0044] It should be noted that the voltage sampling module 2 can adopt a direct sampling circuit, a voltage divider sampling circuit, or an isolated sampling circuit. This embodiment does not limit this.

[0045] In specific implementation, the voltage sampling module 2 is connected to the reference generation module 1 and the adjustment module 3. The adjustment module 3 is also connected to the reference generation module 1, and the reference generation module 1 is also connected to the chip. The voltage sampling module 2 samples the initial protection voltage output by the reference generation module 1 to the chip. The adjustment module 3 calculates the required adjustment resistance value in the reference generation module 1 based on the initial protection voltage, and adjusts the resistance value in the reference generation module 1 according to the adjustment resistance value so that the adjusted resistance value matches the resistance value of the chip.

[0046] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 2 , Figure 2 This is a flowchart illustrating the second embodiment of the chip resistance adjustment circuit of this application.

[0047] In this embodiment, the reference generation module 1 includes: a current source 11 and a resistor unit 12 with adjustable resistance.

[0048] The resistor unit 12 is connected to the current source 11, the adjustment module 3, the voltage sampling module 2 and the chip 4 respectively. The current source 11 is connected to the voltage sampling module 2.

[0049] The current source 11 is used to output a reference voltage to the chip 4 through the resistor unit 12 with adjusted resistance value;

[0050] The adjustment module 3 includes: a calculation unit 31, a control unit 32, and an execution unit 33;

[0051] The control unit 32 is connected to the calculation unit 31 and the execution unit 33 respectively. The calculation unit 31 is connected to the voltage sampling module 2, and the execution unit 33 is connected to the resistor unit 12.

[0052] The calculation unit 31 is used to calculate the adjustment value based on the initial voltage value and transmit the adjustment value to the control unit 32;

[0053] The control unit 32 is used to receive the adjustment value and output a corresponding control signal to the execution unit 33 according to the adjustment value;

[0054] The execution unit 33 is used to receive the control signal and perform corresponding actions according to the control signal to adjust the resistance value of the resistor unit 12.

[0055] It should be noted that the current source 11 can be an adjustable current source 11, a pulse current source 11, or a high-precision current source 11. This embodiment does not limit it in this way.

[0056] It should be noted that the resistor unit 12 may be a variable resistor, a sliding resistor, or multiple resistors; this embodiment does not limit this.

[0057] It should be noted that the execution unit 33 may be a knob, a moving plate, or multiple switches; this embodiment does not limit this.

[0058] It should be noted that the computing unit 31 may be a processor chip 4, a field-programmable gate array, a microcontroller unit 32, or an application-specific integrated circuit or a digital signal processor. This embodiment does not limit this.

[0059] It should be noted that the control unit 32 may be a processor chip 4, a field-programmable gate array, a microcontroller 32, or a dedicated integrated circuit or a digital signal processor. This embodiment does not limit this.

[0060] In specific implementation, the resistor unit 12 is connected to the current source 11, the adjustment module 3, the voltage sampling module 2 and the chip 4 respectively, and the current source 11 is connected to the voltage sampling module 2;

[0061] The current source 11 is used to output a reference voltage to the chip 4 through the resistor unit 12 with adjusted resistance value;

[0062] The adjustment module 3 includes: a calculation unit 31, a control unit 32, and an execution unit 33;

[0063] The control unit 32 is connected to the calculation unit 31 and the execution unit 33 respectively. The calculation unit 31 is connected to the voltage sampling module 2, and the execution unit 33 is connected to the resistor unit 12. The calculation unit 31 calculates the adjustment value based on the initial voltage value and transmits the adjustment value to the control unit 32. The control unit 32 receives the adjustment value and outputs a corresponding control signal to the execution unit 33 based on the adjustment value. The execution unit 33 receives the control signal and performs a corresponding action based on the control signal to adjust the resistance value of the resistor unit 12.

[0064] Based on the second embodiment of this application, in the third embodiment of this application, the content that is the same as or similar to the second embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 3 , Figure 3 This is a flowchart illustrating the third embodiment of the resistance adjustment circuit 5 for chip 4 in this application.

[0065] In this embodiment, the resistor unit 12 includes a plurality of resistors;

[0066] The resistors are connected in series.

[0067] The multiple switches are connected in series.

[0068] The control unit 32 is used to receive the adjustment value output by the calculation module, and output a corresponding control signal to the plurality of switches according to the adjustment value;

[0069] The plurality of switches are used to receive the control signal and perform corresponding actions according to the control signal to adjust the resistance value of the resistor unit 12.

[0070] It should be noted that the resistor can be a transistor resistor, a metal film resistor, a carbon film resistor, or an electrolyte resistor or a wire-wound resistor; this embodiment does not limit the type of resistor.

[0071] It should be noted that the switch can be a relay, a transistor switch, or an integrated circuit switch, and this embodiment does not limit it.

[0072] In this embodiment, the resistor unit 12 includes a protection resistor for protecting the circuit and a plurality of repair resistors for changing the resistance value.

[0073] In this embodiment, the number of switches in the execution unit 33 is the same as the number of repair resistors in the resistor unit 12.

[0074] In this embodiment, the plurality of switches are connected in parallel with the plurality of repair resistors.

[0075] In this embodiment, the switch is controlled by using the internal F of the Verilog A description module. <n>With F <n-1>The resistance relationship between them, for example:

[0076] When the binary value is 00001, the first bit is 1, which controls the high impedance state between FUSE0 and FUSE1. The second to fifth bits are 0, which controls the short circuit state between FUSE1 and FUSE2, between FUSE2 and FUSE3, between FUSE3 and FUSE4, and between FUSE4 and FUSE5, thereby realizing the change of the resistance value of resistor unit 12.

[0077] Understandably, in the initial state, the total resistance of the repair resistor is R = 0Ω, and the initial voltage value is Vref = I1. R0, where I1 is the current value output by current source 11 in the reference module, and R0 is the resistance value of the protection resistor, the voltage sampling module 2 samples the initial voltage value and transmits it to the adjustment module 3. The adjustment module 3 calculates the required adjustment resistor value based on the received initial voltage point and adjusts the R resistor string according to this value so that R≠0, and the protection voltage of chip 4 becomes I1. (R0+R). This circuit adjusts the protection voltage point to the expected target value by adjusting the resistance value of resistor unit 12.

[0078] In specific implementation, the resistors are connected in series; the multiple switches are connected in series; the control unit 32 is used to receive the adjustment value output by the calculation module, and output a corresponding control signal to the multiple switches according to the adjustment value; the multiple switches are used to receive the control signal, and perform corresponding actions according to the control signal to adjust the resistance value of the resistor unit 12.

[0079] In this embodiment, the resistance value of resistor unit 12 is changed by controlling the switch.

[0080] In addition, to achieve the above objectives, this application also proposes a chip that includes the steps of the chip resistance adjustment circuit described above.

[0081] Furthermore, to achieve the above objectives, this application also proposes a chip resistance adjustment method, applied to the aforementioned chip resistance adjustment circuit, wherein the chip resistance adjustment method includes:

[0082] Obtain the initial voltage value of the chip;

[0083] Calculate the adjustment value based on the initial voltage value of the chip;

[0084] The control resistor unit is transformed into the corresponding resistance value according to the adjustment value.

[0085] Optionally, the step of controlling the resistor module to change the corresponding resistance value according to the adjustment value specifically includes:

[0086] Convert the adjustment value into a binary adjustment value;

[0087] The switch in the execution unit 33 is controlled bit by bit according to the binary adjustment value to adjust the resistance value of the resistor unit.

[0088] The above description is only for this application and does not limit the scope of the patent. Any equivalent structural transformations made based on the concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of this application. < / n>

Claims

1. A chip resistance adjustment circuit, characterized in that, The chip resistance adjustment circuit includes: a reference generation module, a voltage sampling module, and an adjustment module; The voltage sampling module is connected to the reference generation module and the adjustment module. The adjustment module is also connected to the reference generation module, and the reference generation module is also connected to the chip. The voltage sampling module is used to sample the initial protection voltage output to the chip by the reference generation module; The adjustment module is used to calculate the required adjustment resistance value in the reference generation module based on the initial protection voltage, and adjust the resistance value in the reference generation module according to the adjustment resistance value so that the adjusted resistance value matches the resistance value of the chip. The reference generation module includes: a current source and an adjustable resistor unit; The resistor unit is connected to the current source, the adjustment module, the voltage sampling module, and the chip respectively, and the current source is connected to the voltage sampling module. The current source is used to output a reference generation module to the chip through the resistor unit with adjusted resistance value; The adjustment module includes: a calculation unit, a control unit, and an execution unit; The control unit is connected to the calculation unit and the execution unit respectively; the calculation unit is connected to the voltage sampling module; and the execution unit is connected to the resistor unit. The calculation unit is used to calculate the adjustment value based on the initial voltage value and transmit the adjustment value to the control unit; The control unit is used to receive the adjustment value and output a corresponding control signal to the execution unit according to the adjustment value; The execution unit is used to receive the control signal and perform corresponding actions according to the control signal to adjust the resistance value of the resistor unit.

2. The chip resistance adjustment circuit as described in claim 1, characterized in that, The resistor unit includes multiple resistors; The resistors are connected in series.

3. The chip resistance adjustment circuit as described in claim 2, characterized in that, The execution unit includes multiple switches; The number of switches is the same as the number of resistors in the resistor unit; The multiple switches are connected in series. The control unit is used to receive the adjustment value output by the calculation module, and output a corresponding control signal to the plurality of switches according to the adjustment value; The plurality of switches are used to receive the control signal and perform corresponding actions according to the control signal to adjust the resistance value of the resistor unit.

4. A chip, characterized in that, The chip includes the chip resistance adjustment circuit according to any one of claims 1-3.

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