Compensation voltage regulation circuit and boost circuit

Abstract

The utility model provides a compensation voltage regulating circuit and a boost circuit, which belong to the technical field of boost, and the compensation voltage regulating circuit is applied to a working circuit with a compensation point for generating input compensation voltage. The circuit includes a plurality of compensation branches controllably connected between a compensation point and a ground terminal. The beneficial effects of the utility model are that the dynamic adjustment and optimization of the R / C value of the input compensation voltage are realized by arranging the plurality of compensation branches which can be controllably connected, so as to adapt to the requirements of different products and loads, improve the flexibility and reliability of circuit design, and reduce the cost and time of product development and production.

Description

Technical Field

[0001] The utility model relates to the technical field of voltage boosting, in particular to a compensation voltage regulating circuit and a voltage boosting circuit. Background Art

[0002] With the rapid development of electronic technology, boost circuits, especially Boost circuits, are increasingly used in various electronic devices, especially in situations where the power supply voltage needs to be increased to drive a specific load or meet specific performance requirements.

[0003] In the Boost circuit, the input compensation voltage (COMP) is one of the key parameters that affects the stability and performance of the circuit. Figure 2 In the circuit shown, the error amplifier 11 (EA) outputs an input compensation voltage COMP according to the output voltage Vout of the Boost circuit and the reference voltage Vref, and the comparator 12 compares the input compensation voltage COMP with the triangle wave to generate a PWM signal to drive the MOS tube of the Boost circuit.

[0004] In current Boost circuits, the input compensation voltage COMP is usually compensated by a fixed compensation resistor R0 and a fixed compensation capacitor C0 in an integrated circuit (IC). The fixed compensation resistor R0 and the fixed compensation capacitor C0 are usually set by the manufacturer based on experience or theoretical simulation.

[0005] However, due to the large differences in device space between different products and the diversity of loads, the R0 / C0 empirical value cannot be fully applied to all products. When the R0 / C0 settings do not match, the voltage floats, which in turn causes the product to display water ripples, bringing great challenges to circuit design and production.

[0006] In actual applications, when it is found that the R0 / C0 empirical value does not meet the requirements of a specific product, it is usually necessary to modify the R0 / C0 value through hardware or modify the circuit board layout (PCB layout) to solve the problem. Although this method of manually soldering the R0 / C0 value can verify the performance of the sample circuit to a certain extent, it has obvious limitations. On the one hand, this method can only temporarily verify a few samples and cannot fully evaluate the performance of the entire production batch; on the other hand, modifying the R0 / C0 value in the Bill of Materials (BOM) or modifying the PCB layout requires a long verification cycle, and once the solution is invalid, it needs to be re-verified, which undoubtedly increases the cost and time of product development and production. Utility Model Content

[0007] In order to solve the above technical problems, the utility model provides a compensation voltage regulating circuit and a boosting circuit.

[0008] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0009] A compensation voltage regulating circuit is applied to a working circuit having a compensation point for generating an input compensation voltage; the compensation voltage regulating circuit comprises:

[0010] A plurality of compensation branches are controllably connected between the compensation point and the ground terminal.

[0011] Preferably, each compensation branch is a resistor and capacitor branch, and the resistor and capacitor branches include:

[0012] Resistor, one end of the resistor is connected to the ground terminal through a capacitor, and the other end of the resistor is connected to the compensation point through a switch.

[0013] Preferably, it further comprises: at least one register, wherein the at least one register is respectively connected to the plurality of compensation branches.

[0014] Preferably, a plurality of control modes are pre-programmed in each register, and each control mode corresponds to a combination of on-off configurations of the plurality of compensation branches.

[0015] Preferably, the working circuit comprises:

[0016] Error amplifier, the non-inverting input terminal of the error amplifier is connected to the output voltage of the working circuit, the inverting input terminal of the error amplifier is connected to the reference voltage, and the output terminal of the error amplifier is used as a compensation point.

[0017] Preferably, the working circuit further includes:

[0018] Fixed compensation branch, connected between the compensation point and the ground terminal.

[0019] The utility model also provides a boost circuit, comprising:

[0020] for an operating circuit having a compensation point for generating an input compensation voltage, the operating circuit being configured to generate an output voltage higher than the input voltage;

[0021] The compensation voltage regulating circuit as described above can be controllably connected between the compensation point and the ground terminal.

[0022] Preferably, the working circuit comprises:

[0023] Error amplifier, the non-inverting input terminal of the error amplifier is connected to the output voltage of the working circuit, the inverting input terminal of the error amplifier is connected to the reference voltage, and the output terminal of the error amplifier is used as a compensation point.

[0024] Preferably, the working circuit further includes:

[0025] Fixed compensation branch, connected between the compensation point and the ground terminal.

[0026] The advantages or beneficial effects of the technical solution of the utility model are:

[0027] The utility model realizes dynamic adjustment and optimization of the R / C value of the input compensation voltage by setting a plurality of compensation branches that can be controlled and connected, so as to adapt to the needs of different products and loads, improve the flexibility and reliability of circuit design, and reduce the cost and time of product development and production. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural block diagram of a compensation voltage regulating circuit in a preferred embodiment of the utility model;

[0029] Figure 2 This is a circuit diagram of a compensation voltage regulating circuit in a preferred embodiment of the utility model;

[0030] Figure 3 This is a circuit diagram of a register-controlled switch of a compensation voltage regulation circuit in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0034] See also Figure 1 , Figure 2 and Figure 3 In a preferred embodiment of the utility model, based on the above problems existing in the prior art, a compensation voltage regulating circuit is provided, which is applied to a working circuit 1 having a compensation point A for generating an input compensation voltage COMP; the compensation voltage regulating circuit comprises:

[0035] A plurality of compensation branches CH1, CH2, ..., CHn are controllably connected between the compensation point A and the ground terminal.

[0036] Specifically, the existing method of modifying the R0 / C0 value in the BOM by hardware or modifying the PCB layout can only temporarily verify a few samples and cannot comprehensively evaluate the performance of the entire production batch; at the same time, a longer verification cycle is required, and once the solution is invalid, it needs to be re-verified, which undoubtedly increases the cost and time of product development and production.

[0037] The compensation voltage regulation circuit of this embodiment is composed of multiple compensation branches CH1, CH2, ..., CHn, and each compensation branch independently controls whether it is connected to the compensation point. By controlling the switch state of different compensation branches, the R / C value of the input compensation voltage COMP is dynamically adjusted. This method is more flexible and efficient than the traditional method of modifying the BOM table or PCB layout.

[0038] By adjusting the number and combination of compensation branches connected to the circuit, the R / C value of the compensation voltage COMP can be accurately adjusted to meet the needs of different products and loads, thereby improving the flexibility and reliability of circuit design; at the same time, frequent BOM or PCB layout modifications are avoided, thereby reducing the cost and time of product development and production.

[0039] As a preferred embodiment, wherein Figure 2 and Figure 3 As shown, each compensation branch is a resistor and capacitor branch, and the resistor and capacitor branches include:

[0040] Resistor, one end of the resistor is connected to the ground terminal through a capacitor, and the other end of the resistor is connected to the compensation point A through a switch.

[0041] Specifically, each compensation branch is designed as a resistor-capacitor branch, including a resistor and a capacitor. One end of the resistor is connected to the ground terminal through the capacitor, and the other end of the resistor is connected to the compensation point A through a switch.

[0042] Furthermore, multiple compensation branches CH1, CH2, ..., CHn are added inside the integrated circuit (IC), and the number and combination of the compensation branches are selected and adjusted to achieve precise control of the compensation voltage COMP. This compensation R / C selection scheme designed inside the IC not only avoids changes in BOM or layout, but also solves the voltage floating problem caused by R / C setting mismatch, thereby solving problems such as water ripples on the product display, and further improves the reliability and stability of the circuit.

[0043] It should be noted that the number of compensation branches can be set according to actual needs. In this embodiment, n represents the number of compensation branches, which can be selected and adjusted according to specific application scenarios and needs, and the present invention does not limit this.

[0044] As a preferred embodiment, wherein Figure 3 As shown, it also includes: at least one register 2, and the at least one register 2 is respectively connected to multiple compensation branches CH1, CH2, ..., CHn.

[0045] Specifically, the integrated circuit (IC) also integrates a register 2, which includes at least one for controlling and managing the on-off state of these compensation branches. By dynamically adjusting the combination of the compensation branches, precise control of the R / C value of the input compensation voltage is achieved to meet the needs of different products and loads.

[0046] Register 2 is used to store and manage the on / off configuration information of the combination of compensation branches (ie, control mode hereinafter). In this embodiment, each register can set multiple enable control signals, each enable control signal corresponding to the on / off state of one or more compensation branches.

[0047] It should be noted that the number of registers can be set according to the number of specific compensation branches. For example, one register can set 8 enable control signals (en), and these 8 en can control the on and off states of up to 8 compensation branches. If the number of compensation branches exceeds the range that a single register can control, multiple registers can be used in combination to meet the needs.

[0048] As a preferred implementation, a plurality of control modes are pre-programmed in each register 2, and each control mode corresponds to a combination of on-off configurations of a plurality of compensation branches.

[0049] Specifically, during the product design phase, different control modes are set through software, and the performance of the circuit is observed to select the most appropriate control mode. During the product production process, these control mode settings are burned into register 2, which improves the flexibility and debuggability of the circuit, and can comprehensively evaluate the performance of the entire production batch, and reduce the verification time, reducing the cost and time of product development and production.

[0050] Exemplarily, the pre-burning combination of the control mode (Mode) is shown in Table 1 below:

[0051] Table 1: Correspondence between control mode and channel combination

[0052] Mode CH Mode1 CH1 Mode2 CH1+CH2 … … Moden CH1+CH2+…+CHn

[0053] In the above Table 1, CH represents a channel, and each compensation branch corresponds to a channel.

[0054] The first compensation branch is denoted by CH1, and so on, the nth compensation branch is denoted by CHn.

[0055] Table 1 above shows the incremental control mode based on channel accumulation, enumerating different control modes (Mode1, Mode2, ..., Mode n) and corresponding channel combinations (CH1, CH1+CH2, ..., CH1+CH2+...+CH n). For example, Mode1 means turning on only the CH1 channel, i.e., the first compensation branch; Mode2 means turning on both the CH1 and CH2 channels, i.e., the first two compensation branches; and so on, until Mode n means turning on all compensation branches.

[0056] Specifically, each control mode includes at least CH1.

[0057] As the control mode increases from Mode 1 to Mode n, the number of channels involved in the combination gradually increases. Specifically, Mode 2 contains more CH2 than Mode 1, Mode 3 contains more CH3 than Mode 2, and so on, until Mode n contains all channels from CH1 to CH n.

[0058] Each control mode corresponds to its corresponding channel combination one by one.

[0059] The combination of channels is cumulative, that is, the new pattern is formed by adding new channels to the previous pattern, ensuring the incrementality and predictability of the pattern.

[0060] It should be noted that, although the present invention is described through examples from Mode 1 to Mode n, the control law and channel configuration mode are not limited thereto, but can be expanded to more other control law channel modes according to actual needs.

[0061] As an example but not a limitation, assuming that the capacitance values ​​and resistance values ​​in multiple compensation branches change progressively, such as increasing or decreasing, Mode 1 can also be set to indicate that only the CH1 channel is turned on, that is, the first compensation branch; Mode 2 indicates that only the CH2 channel is turned on, that is, the second compensation branch; and so on, until Mode n indicates that only the CHn channel is turned on, that is, the nth compensation branch; Mode n+1 indicates that the CH1 and CH2 channels are turned on at the same time, that is, the first two compensation branches, and so on. More combination modes can be designed until all compensation branches are turned on.

[0062] In addition to the preset control mode, the on and off of the multiple compensation branches in this embodiment can also be adaptively controlled according to actual conditions.

[0063] As a preferred embodiment, the working circuit 1 includes:

[0064] The error amplifier 11 (EA) has a positive input terminal connected to the output voltage Vout of the working circuit 1 , an inverting input terminal connected to the reference voltage Vref, and an output terminal of the error amplifier is used as a compensation point A.

[0065] Specifically, the error amplifier 11 outputs an input compensation voltage COMP according to the output voltage Vout and the reference voltage Vref.

[0066] Furthermore, the non-inverting input terminal of the error amplifier 11 may also be connected to a feedback voltage of the output voltage Vout instead of the output voltage Vout. The error amplifier 11 outputs an input compensation voltage COMP according to the feedback voltage of the output voltage Vout and the reference voltage Vref.

[0067] As a preferred embodiment, the working circuit 1 further includes:

[0068] The fixed compensation branch is connected between the compensation point A and the ground terminal.

[0069] Specifically, the fixed compensation branch is implemented by a resistor-capacitor network, which includes a fixed compensation resistor R0 and a fixed compensation capacitor C0, and the fixed compensation resistor R0 and the fixed compensation capacitor C0 are connected in series between the compensation point A and the ground terminal.

[0070] The utility model also provides a boost circuit, comprising:

[0071] A working circuit 1 having a compensation point A for generating an input compensation voltage COMP, the working circuit 1 being used to generate an output voltage higher than an input voltage;

[0072] The compensation voltage regulating circuit as described above can be controllably connected between the compensation point A and the ground terminal.

[0073] Specifically, the voltage boost circuit is preferably a Boost voltage boost circuit.

[0074] As a preferred embodiment, the working circuit 1 includes:

[0075] The error amplifier 11 has a positive input terminal connected to the output voltage Vout of the working circuit 1 , an inverting input terminal connected to the reference voltage Vref, and an output terminal of the error amplifier is used as a compensation point A.

[0076] As a preferred embodiment, the working circuit 1 further includes:

[0077] The fixed compensation branch is connected between the compensation point A and the ground terminal.

[0078] The advantages or beneficial effects of adopting the above technical solution are: the utility model realizes dynamic adjustment and optimization of the R / C value of the input compensation voltage by setting a plurality of compensation branches with controllable connections to adapt to the needs of different products and loads, improves the flexibility and reliability of circuit design, and reduces the cost and time of product development and production.

[0079] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of this specification and illustrations should be included in the protection scope of the present invention.

Claims

1. A compensation voltage regulating circuit, characterized in that: Applicable to an operating circuit having a compensation point for generating an input compensation voltage; The compensation voltage regulating circuit comprises: A plurality of compensation branches are controllably connected between the compensation point and the ground terminal; each of the compensation branches is a resistor and capacitor branch, and the resistor and capacitor branches include: A resistor, one end of which is connected to the ground end via a capacitor, and the other end of which is connected to the compensation point via a switch.

2. The compensation voltage regulating circuit according to claim 1, characterized in that: Also includes: At least one register, wherein the at least one register is respectively connected to the plurality of compensation branches.

3. The compensation voltage regulating circuit according to claim 2, characterized in that: A plurality of control modes are pre-programmed in each of the registers, and each control mode corresponds to a combination of on-off configurations of the plurality of compensation branches.

4. The compensation voltage regulating circuit according to claim 1, characterized in that: The working circuit comprises: An error amplifier, wherein a non-inverting input terminal of the error amplifier is connected to the output voltage of the working circuit, an inverting input terminal of the error amplifier is connected to a reference voltage, and an output terminal of the error amplifier serves as the compensation point.

5. The compensation voltage regulating circuit according to claim 1, characterized in that: The working circuit also includes: The fixed compensation branch is connected between the compensation point and the ground terminal.

6. A boost circuit, characterized in that: include: an operating circuit having a compensation point for generating an input compensation voltage, the operating circuit being configured to generate an output voltage higher than the input voltage; The compensation voltage regulating circuit as described in any one of claims 1 to 5 is controllably connected between the compensation point and the ground terminal.

7. The boost circuit according to claim 6, characterized in that: The working circuit comprises: An error amplifier, wherein a non-inverting input terminal of the error amplifier is connected to the output voltage of the working circuit, an inverting input terminal of the error amplifier is connected to a reference voltage, and an output terminal of the error amplifier serves as the compensation point.

8. The boost circuit according to claim 6, characterized in that: The working circuit also includes: The fixed compensation branch is connected between the compensation point and the ground terminal.

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