Instantaneous Response Enhancement System and Method with Error Amplification Signal Prediction Mechanism

Abstract

The present invention discloses an instantaneous response improvement system and method with an error amplified signal prediction mechanism. A current sensing circuit senses a current flowing through a first resistor connected between an adapter and an electrical device. When the current is greater than a current threshold, a prediction circuit calculates a target level based on a shared voltage and the voltage of a battery, and instantaneously pulls the level of the error amplified signal to the target level. A comparator compares the error amplified signal with a ramp signal to output a comparison signal. A control circuit controls a driving circuit to switch an upper bridge switch and a lower bridge switch based on the comparison signal.

Description

Technical Field

[0001] The present invention relates to a switching charger, and particularly to an instantaneous response improvement system and method with an error amplification signal prediction mechanism. Background Art

[0002] In recent years, with the progress of technology, electronic products with various different functions have been gradually developed, which not only meet people's various different needs, but also integrate into everyone's daily life, making people's life more convenient. These electronic products are composed of various electronic components, and the power supply voltages required by each electronic component are not the same. Therefore, in order to make these various electronic products with different functions operate normally, it is necessary to convert the input voltage into an appropriate voltage through a switching charger and supply it to the electronic components of the electronic products for use. However, when the electronic product requires a large amount of power, the switching components of the existing switching charger cannot be switched quickly, and cannot supply enough power to the electronic product in real time. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an instantaneous response improvement system with an error amplification signal prediction mechanism for a switching charger in view of the deficiencies of the prior art. The switching charger includes an upper bridge switch, a lower bridge switch, a driving circuit, and a control circuit. The driving circuit is connected to the control circuit, the control terminal of the upper bridge switch, and the control terminal of the lower bridge switch. The first terminal of the upper bridge switch is coupled to a shared voltage, the first terminal of a first resistor, and an electrical device. The second terminal of the first resistor is connected to an input power supply. The input power supply supplies power to cause a current to flow through the first resistor to the electrical device. The first terminal and the second terminal of the lower bridge switch are connected to the second terminal of the upper bridge switch and ground respectively. A node between the second terminal of the upper bridge switch and the first terminal of the lower bridge switch is connected to a battery through an inductor. The instantaneous response improvement system with an error amplification signal prediction mechanism includes a current sensing circuit, a prediction circuit, and a comparator. The current sensing circuit is connected to the first resistor. The current sensing circuit is configured to sense the current flowing through the first resistor and output a boost mode trigger signal when it determines that the current is greater than a current threshold. The prediction circuit is connected to the current sensing circuit and the battery and is coupled to the shared voltage. The prediction circuit is configured to determine to enter an accelerated boost mode from a buck mode when receiving the boost mode trigger signal. The prediction circuit calculates a target level based on the shared voltage and the voltage of the battery and instantaneously pulls the level of an error amplification signal to the target level. The first input terminal of the comparator is connected to a ramp signal generator. The second input terminal of the comparator is connected to the output terminal of the prediction circuit. The comparator is configured to receive a ramp signal from the ramp signal generator and compare the error amplification signal with the ramp signal to output a comparison signal. In the accelerated boost mode, the control circuit controls the driving circuit to drive the upper bridge switch and the lower bridge switch according to the comparison signal, allowing the current of the battery to flow through the inductor and the upper bridge switch to the electrical device in sequence, while the current flows through the first resistor to the electrical device.

[0004] In one embodiment, the switching charger further includes a compensation circuit. The compensation circuit is connected between the prediction circuit and the second input terminal of the comparator and is connected to the first resistor, the second resistor, and the battery. The compensation circuit is configured to output an error amplification signal based on the voltage or current value of one or more of the first resistor, the second resistor, and the battery.

[0005] In one embodiment, the switching charger further includes a feedback circuit. The compensation circuit is connected to the first resistor, the second resistor, and the battery through the feedback circuit. The feedback circuit is configured to feedback the voltage or current value of one or more of the first resistor, the second resistor, and the battery to the compensation circuit.

[0006] In one embodiment, the prediction circuit includes a level prediction circuit and a level adjustment circuit. The level prediction circuit is coupled to a shared voltage and is connected to the battery and the level adjustment circuit. The level adjustment circuit is connected to the current sensing circuit and the compensation circuit. The level prediction circuit calculates a target level based on the shared voltage and the voltage of the battery. When the level adjustment circuit receives a boost mode trigger signal, it instantaneously pulls the level of the error amplification signal to the target level.

[0007] In one embodiment, the prediction circuit further includes a period calculation circuit. The level prediction circuit is connected to the shared voltage and the battery through the period calculation circuit. The period calculation circuit is configured to divide the voltage of the battery by the shared voltage and multiply by the period of the ramp signal to calculate a conduction time of an upper bridge switch, and the level prediction circuit predicts the target level based on the conduction time.

[0008] In one embodiment, the prediction circuit further includes a buffer. A first input terminal of the buffer is connected to an output terminal of the level prediction circuit and an input terminal of the level adjustment circuit. A second input terminal of the buffer is connected to an output terminal of the buffer and the level adjustment circuit.

[0009] In one embodiment, in the buck mode, after the current flows from the input power supply through the first resistor, the current is divided into two paths and flows to the electrical device and the battery respectively, or flows to one of the electrical device and the battery.

[0010] In addition, the present invention provides an instantaneous response improvement method with an error amplification signal prediction mechanism, which is applicable to a switching charger. The switching charger includes an upper bridge switch, a lower bridge switch, a driving circuit, and a control circuit. The driving circuit is connected to the control circuit, a control terminal of the upper bridge switch, and a control terminal of the lower bridge switch. A first terminal of the upper bridge switch is coupled to the shared voltage, a first terminal of the first resistor, and the electrical device. A second terminal of the first resistor is connected to the input power supply. A first terminal and a second terminal of the lower bridge switch are respectively connected to a second terminal of the upper bridge switch and the ground. A node between the second terminal of the upper bridge switch and the first terminal of the lower bridge switch is connected to the battery through an inductor. The instantaneous response improvement method with the error amplification signal prediction mechanism includes the following steps: supplying power from the input power supply to cause a current to flow through the first resistor to the electrical device; sensing the current flowing through the first resistor; determining that the current is greater than a current threshold, if not, returning to the previous step, if so, determining to enter the accelerated boost mode from the buck mode and executing the next step; calculating a target level based on the shared voltage and the voltage of the battery; instantaneously pulling the level of the error amplification signal to this target level; comparing the error amplification signal with the ramp signal to output a comparison signal; and controlling the driving circuit to drive the upper bridge switch according to the boost mode trigger signal based on the comparison signal, so as to allow the current of the battery to flow through the inductor and the upper bridge switch to the electrical device in sequence, and at the same time supply power to the electrical device.

[0011] In one embodiment, the method for enhancing the instantaneous response with an error amplification signal prediction mechanism further comprises the following steps: outputting an error amplification signal based on the voltage or current value of one or more of a first resistor, a second resistor connected between an inductor and a battery, and the battery; and instantaneously pulling the level of the error amplification signal to a target level.

[0012] In one embodiment, the method for enhancing the instantaneous response with an error amplification signal prediction mechanism further comprises the following steps: dividing the voltage of the battery by the shared voltage and multiplying by the period of the ramp signal to calculate the conduction time of the high-side switch; and predicting the target level based on the conduction time.

[0013] As described above, the present invention provides a system and method for enhancing the instantaneous response with an error amplification signal prediction mechanism, which can predict the target level based on the shared voltage (input voltage) of the switching charger and the battery voltage (output voltage of the switching charger), instantaneously pull / clamp the voltage level of the error amplification signal to the predicted target level, so as to trigger the control circuit to control the drive circuit to quickly switch the high-side switch and the low-side switch. Furthermore, when the electrical device draws a heavy load or for other reasons, and the adapter or other input power source cannot supply sufficient power to the electrical device, the backup power source such as the battery can be quickly switched to assist in supplying power to the power device.

[0014] To enable a further understanding of the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the provided drawings are only for reference and illustration, and are not intended to limit the present invention. Description of the Drawings

[0015] Figure 1 It is a block diagram of a system for enhancing the instantaneous response with an error amplification signal prediction mechanism according to an embodiment of the present invention.

[0016] Figure 2 It is a flowchart of the steps of a method for enhancing the instantaneous response with an error amplification signal prediction mechanism according to an embodiment of the present invention.

[0017] Figure 3 It is a block diagram of the internal components of a prediction circuit of a system for enhancing the instantaneous response with an error amplification signal prediction mechanism according to an embodiment of the present invention.

[0018] Figure 4 It is a block diagram of a system for enhancing the instantaneous response with an error amplification signal prediction mechanism according to an embodiment of the present invention.

[0019] Figure 5 It is a waveform diagram of an error amplification signal and a ramp signal of a switching charger according to an embodiment of the present invention.

[0020] Figure 6This is a waveform diagram of the error amplification signal and the ramp signal of the present invention and a traditional switching charger.

[0021] Figure 7 This is a waveform diagram of the current waveforms of the first resistor, the current waveforms of the second resistor, the error amplification signal, and the ramp signal of the present invention and a traditional switching charger. Detailed implementation manners

[0022] The following are specific embodiments to illustrate the implementation manners of the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. Additionally, the drawings of the present invention are only simple schematic illustrations and are not drawn according to actual dimensions, which is hereby stated in advance. The following implementation manners will further detail the related technical content of the present invention, but the disclosed content is not intended to limit the protection scope of the present invention. In addition, the term "or" used herein should, depending on the actual situation, possibly include any one or a combination of more of the associated listed items.

[0023] Please refer to Figure 1 , which is a block diagram of an instantaneous response improvement system with an error amplification signal prediction mechanism according to an embodiment of the present invention. It should be understood that the instantaneous response improvement system of the present invention is not limited to all the circuit components shown in the necessary settings of the drawings, and in fact, some components can be omitted.

[0024] As Figure 1 shown, the instantaneous response improvement system of this embodiment may include a prediction circuit 10, a current sensing circuit 30, and a comparator 50, and can be applied to a switching charger (switching charging) or a power converter. This switching charger may include an upper bridge switch UG, a lower bridge switch LG, a drive circuit 70, and a control circuit 60. It should be understood that any circuit component included in this switching charger can also be replaced by those included in the instantaneous response improvement system.

[0025] The input end of the drive circuit 70 is connected to the output end of the control circuit 60. The output end of the drive circuit 70 is connected to the control ends of the upper bridge switch UG and the lower bridge switch LG. The first end of the upper bridge switch UG is coupled to the shared voltage VSYS and is connected to the electrical device 99. The second end of the upper bridge switch UG is connected to the first end of the lower bridge switch LG. The second end of the lower bridge switch LG is grounded.

[0026] The first end of the first resistor RCIC is connected to the first end of the upper bridge switch UG, and the second end of the first resistor RCIC is connected to an input power supply such as an adapter 90 or other power supply device. The second end of the first resistor RCIC is connected to the adapter 90. The adapter 90 supplies the input power, causing a current to flow through the first resistor RCIC to the electrical device 99.

[0027] The node LX between the second end of the upper bridge switch UG and the first end of the lower bridge switch LG can be connected to the battery 98 through the inductor L. If necessary, the switching charger may further include a second resistor RCC and a feedback circuit 80. The second resistor RCC can be connected between the inductor L and the battery 98.

[0028] The feedback circuit 80 is connected to the first end and the second end of the first resistor RCIC, the first end and the second end of the second resistor RCC, and the battery 98. The feedback circuit 80 can be configured to feedback one or more of the current value CIC (which can actually be a voltage value) of the first resistor RCIC, the current value CC (which can actually be a voltage value) of the second resistor RCC, and the voltage value CV of the battery 98 to the compensation circuit 20.

[0029] If necessary, the switching charger may include a compensation circuit 20. The compensation circuit 20 can be connected to the feedback circuit 80 and the second input terminal of the comparator 50, such as the inverting input terminal. The compensation circuit 20 can output an error amplification signal EAO to the second input terminal of the comparator 50, such as the inverting input terminal, according to one or more of the current value CIC (which can actually be a voltage value) of the first resistor RCIC, the current value CC (which can actually be a voltage value) of the second resistor RCC, and the voltage value CV of the battery 98. The first input terminal of the comparator 50, such as the non-inverting input terminal, is connected to the ramp signal generation circuit 40.

[0030] It should be noted that the prediction circuit 10 is coupled to the shared voltage VSYS and is connected to the current sensing circuit 30. The prediction circuit 10 is connected to the battery 98. In other words, the prediction circuit 10 is connected to the output terminal VBAT of the switching charger, that is, the second end of the second resistor RCC. In this embodiment, as Figure 1 shown, the compensation circuit 20 is exemplified, but the present invention is not limited thereto. If the compensation circuit 20 is not provided, the prediction circuit 10 can be directly connected to the second input terminal of the comparator 50, such as the inverting input terminal.

[0031] Please refer to Figure 1 and Figure 2 , where Figure 1 is a block diagram of an instantaneous response improvement system with an error amplification signal prediction mechanism according to an embodiment of the present invention; Figure 2 is a step flowchart of an instantaneous response improvement method with an error amplification signal prediction mechanism according to an embodiment of the present invention.

[0032] The instantaneous response improvement method with an error amplification signal prediction mechanism according to an embodiment of the present invention may include steps S101 to S121 as shown in Figure 2 shown, which may be executed by the instantaneous response improvement system as shown in Figure 1 shown on the switching charger to put the switching charger in the buck mode and the accelerated boost mode (turbo boost mode).

[0033] In step S101, enter the buck mode.

[0034] In step S103, current is supplied by the adapter 90 or other power supply device. This current flows through the first resistor RCIC to form the current ICIC. This current ICIC can then be divided into two paths of current, ISYS and IPWM, and flow to the electrical device 99 and the battery 98 respectively, so that the electrical device 99 (such as a server) obtains the power required to execute the program and charges the battery 98. In fact, the current ICIC can only be supplied to one of the electrical device 99 and the battery 98.

[0035] In step S105, the current sensing circuit 30 is used to sense the current ICIC flowing through the first resistor RCIC.

[0036] In step S107, the current sensing circuit 30 is used to determine whether the value of the current ICIC of the sensed first resistor RCIC is greater than the current threshold. If the value of the current ICIC of the first resistor RCIC is not greater than the current threshold, at this time the electrical device 99 may draw a light load or a medium load. Since the power consumption required by the electrical device 99 is not large, current can be supplied to the adapter 90 by a single power supply device such as the adapter 90.

[0037] It should be noted that when the electrical device 99 draws a heavy load, the required power increases, resulting in an increase in the current supplied by a single power supply device such as the adapter 90. At this time, if the value of the current ICIC of the first resistor RCIC sensed by the current sensing circuit 30 is greater than the current threshold, such as the rated current, a boost mode trigger signal is output, and then step S109 is executed.

[0038] In step S109, when the prediction circuit 10 receives a boost mode trigger signal indicating that the value of the current ICIC of the first resistor RCIC is greater than the current threshold from the current sensing circuit 30, it decides to enter the accelerated boost mode from the buck mode.

[0039] In step S111, the prediction circuit 10 is used to obtain the shared voltage VSYS and the voltage VBAT of the battery 98.

[0040] In step S113, the prediction circuit 10 calculates the target level of the predicted error amplification signal EAO based on the shared voltage VSYS and the voltage VBAT of the battery 98.

[0041] In step S115, the prediction circuit 10 outputs the error amplification signal EAO with the target level to the second input terminal (e.g., the inverting input terminal) of the comparator 50, or when the compensation circuit 20 is provided in the switching charger, the level of the error amplification signal EAO output by the compensation circuit 20 is instantaneously pulled to the target level.

[0042] In step S117, the comparator 50 compares the error amplification signal EAO with the ramp signal RAMP received from the ramp signal generation circuit 40 to output a comparison signal to the control circuit 60.

[0043] In step S119, the control circuit 60 controls the drive circuit 70 to drive the upper bridge switch UG and the lower bridge switch LG according to the comparison signal, so that in step S121, the current IPWM of the battery 98 as a backup power supply is allowed to flow through the inductor L and the upper bridge switch UG to the electrical device 99 in sequence, and at the same time, the current ICIC flows to the electrical device 99.

[0044] That is to say, when the electrical device 99 draws a heavy load, the power of the additional current value supplied by the adapter 90 may not be sufficient to meet the power consumption requirements of the electrical device 99. At this time, the battery 98 as a backup power supply can discharge to assist in supplying power to the electrical device 99. In this case, the current ISYS received by the electrical device 99 includes the current ICIC from the adapter 90 and the current IPWM from the battery 98. At this time, step S105 can be continuously executed to continuously sense the current ICIC flowing through the first resistor RCIC by the current sensing circuit 30.

[0045] When the power consumption of the electrical device 99 decreases, for example, when it is not drawing a heavy load, and the value of the current ICIC of the first resistor RCIC drops to be greater than the current threshold, the system can return from the boost - step - up mode to the buck - step - down mode. In the buck - step - down mode, only the adapter 90 supplies the current ICIC to the electrical device 99, and the battery 98 does not discharge. At this time, if necessary, the adapter 90 can supply the current IPWM to the battery 98 to charge the battery 98.

[0046] Please refer to Figures 3 to 6 where Figure 3 is a block diagram of the internal components of the prediction circuit of the instantaneous response improvement system with an error amplification signal prediction mechanism according to an embodiment of the present invention; Figure 4 is a block diagram of the instantaneous response improvement system with an error amplification signal prediction mechanism according to an embodiment of the present invention; Figure 5Waveform diagram of the error amplification signal and the ramp signal of the switching charger according to an embodiment of the present invention; Figure 6 Waveform diagram of the error amplification signal and the ramp signal of the present invention and a conventional switching charger. The same content as described above will not be repeated here.

[0047] As Figure 3 and Figure 4 shown, the prediction circuit 10 may include a period calculation circuit 101, a level prediction circuit 102, a buffer 103, and a level adjustment circuit 104, but the present invention is not limited thereto. In fact, according to actual requirements, the buffer 103 or other circuit components may be omitted.

[0048] The input end of the period calculation circuit 101 is coupled to the shared voltage VSYS and connected to the battery 98. The input end of the level prediction circuit 102 may be connected to the output end of the period calculation circuit 101, and the output end of the level prediction circuit 102 is connected to the first input end of the buffer 103, such as the non-inverting input end. The second input end of the buffer 103, such as the inverting input end, is connected to the output end of the level prediction circuit 102 and the input end of the level adjustment circuit 104.

[0049] As Figure 5 shown, within the first time t11 in the buck mode and the first time t21 in the boost mode, the upper bridge switch UG is turned on and the lower bridge switch LG is turned off, and within the second time t12 in the buck mode and the second time t22 in the boost mode, the lower bridge switch LG is turned on and the upper bridge switch UG is turned off.

[0050] As Figure 3 and shown, when the voltage of the ramp signal RAMP generated by the ramp signal generator 40 gradually rises to reach the voltage of the error amplification signal EAO, such as at the time point circled by the circle in Figure 5 , the upper bridge switch UG and the lower bridge switch LG are switched. Accordingly, as long as the conduction time of the upper bridge switch UG is calculated, the time point for switching the upper bridge switch UG and the lower bridge switch LG can be predicted.

[0051] Therefore, in the buck mode, the period calculation circuit 101 can divide the voltage VBAT of the battery 98 by the shared voltage VSYS and multiply by the period of the ramp signal RAMP to calculate the conduction time of the upper bridge switch UG, which is expressed by the following equation:

[0052] Ton = (VBAT / VSYS) × Ts,

[0053] Where Ton represents the conduction time of the upper bridge switch UG in the buck mode, VSYS represents the shared voltage (input voltage), VBAT represents the voltage of the battery 98 (i.e., the output voltage of the switching charger), and Ts represents the period of the ramp signal RAMP.

[0054] In the boost mode, the period calculation circuit 101 can divide the voltage VBAT of the battery 98 by the shared voltage VSYS and multiply by the period of the ramp signal RAMP to calculate the conduction time of the upper bridge switch UG, which is represented by the following equation:

[0055] Toff = (VBAT / VSYS) × Ts,

[0056] Where Toff represents the conduction time of the upper bridge switch UG in the boost mode, VSYS represents the shared voltage (output voltage), VBAT represents the voltage of the battery 98 (i.e., the input voltage of the switching charger), and Ts represents the period of the ramp signal RAMP.

[0057] If necessary, in the boost mode, the period calculation circuit 101 can calculate the conduction time of the lower bridge switch LG based on the following equation:

[0058] Ton = ((VSYS - VBAT) / VSYS) × Ts,

[0059] Where Ton represents the conduction time of the lower bridge switch LG in the boost mode, VSYS represents the shared voltage output voltage, VBAT represents the voltage of the battery 98 (i.e., the input voltage of the switching charger), and Ts represents the period of the ramp signal RAMP.

[0060] After the period calculation circuit 101 calculates the conduction time of the upper bridge switch UG, the level prediction circuit 102 can predict the target level based on the conduction time of the upper bridge switch UG and transmit it (through the buffer 103) to the level adjustment circuit 104.

[0061] When the level adjustment circuit 104 receives a boost mode trigger signal from the current sensing circuit 30 indicating that the value of the current ICIC in the first resistor RCIC is greater than the current threshold, the level adjustment circuit 104 decides to enter the accelerated boost mode from the buck mode. At this time, the level adjustment circuit 104 pulls the level of the error amplification signal EAO instantaneously to the target level as Figure 5 shown to trigger the control circuit 60 to control the drive circuit 70 to quickly switch the upper bridge switch and the lower bridge switch LG.

[0062] Compared with the switching charger of the present invention, the level of the error amplification signal EAO generated as Figure 6 shown or the level of the error amplification signal eao1 generated as Figure 5 shown is instantaneously pulled up to the target level, asFigure 6 The eao0 shown represents the error amplification signal of a traditional switching charger, which takes some time to rise to the target level. Therefore, compared with the traditional switching charger, the switching speed of the upper bridge switch and the lower bridge switch of the switching charger of the system of the present invention is faster. Thus, when the power consumption of the electrical device 99 is large and the adapter 90 cannot supply enough power to the electrical device 99, the battery 98 as a backup power source can be allowed to assist in supplying power, which is transmitted to the electrical device 99 through the conducting upper bridge switch.

[0063] Please refer to Figure 6 , which is a waveform diagram of the current of the first resistor, the current of the second resistor, the error amplification signal, and the ramp signal of the present invention and a traditional switching charger.

[0064] As shown, visys1, viadp1, vil1, eao1, and ramp1 respectively represent the load current signal of the electrical device, the current signal of the aforementioned first resistor RCIC, the current signal of the aforementioned second resistor RCC, the error amplification signal, and the ramp signal of the switching charger of the present invention within the time interval enclosed by the square AA in Figure 7 . Within the same time interval, as Figure 7 Figure 6 Figure 7 shown, viadp0, vil0, eao0, and ramp0 respectively represent the current signal of the first resistor, the current signal of the second resistor, the error amplification signal, and the ramp signal of a traditional switching charger.

[0065] It should be noted that compared with the current signal viadp0 of the first resistor and the current signal vil0 of the second resistor of a traditional switching charger, the current signal viadp1 of the first resistor RCIC of the improved switching charger of the present invention quickly reaches the current threshold, and the current value of the current signal vil1 of the second resistor RCC quickly reaches the steady state value and enters the turbo boost mode.

[0066] In summary, the present invention provides an instantaneous response improvement system and method with an error amplification signal prediction mechanism, which can predict the target level based on the shared voltage (input voltage) of the switching charger and the battery voltage (output voltage of the switching charger), instantaneously pull / clamp the voltage level of the error amplification signal to the predicted target level, trigger the control circuit to control the drive circuit to quickly switch the upper bridge switch and the lower bridge switch, and thus when the electrical device draws a heavy load or for other reasons, the adapter or other input power sources cannot supply enough power to the electrical device, the backup power source such as the battery can be quickly switched to assist in supplying power to the power device.

[0067] The above-disclosed content is only the preferred and feasible embodiment of the present invention, and does not limit the claims of the present invention. Therefore, all equivalent technical changes made by using the content of the specification and drawings of the present invention are included in the claims of the present invention.

Claims

1. An instantaneous response improvement system with an error amplified signal prediction mechanism, applicable to a switching charger. The switching charger includes an upper bridge switch, a lower bridge switch, a driving circuit, and a control circuit. The driving circuit is connected to the control circuit, the control terminal of the upper bridge switch, and the control terminal of the lower bridge switch. The first terminal of the upper bridge switch is coupled to a shared voltage, the first terminal of a first resistor, and an electrical device. The second terminal of the first resistor is connected to an input power supply. The input power supply supplies power to cause a current to flow through the first resistor to the electrical device. The first terminal and the second terminal of the lower bridge switch are respectively connected to the second terminal of the upper bridge switch and ground. A node between the second terminal of the upper bridge switch and the first terminal of the lower bridge switch is connected to a battery through an inductor. It is characterized in that, The instantaneous response improvement system with an error amplification signal prediction mechanism includes: A current sensing circuit, connected to the first resistor, configured to sense the current flowing through the first resistor, and output a boost mode trigger signal when it determines that the current is greater than the current threshold; A prediction circuit, connected to the current sensing circuit and the battery, and coupled to the shared voltage, configured to determine to enter the accelerated boost mode from the buck mode when receiving the boost mode trigger signal, calculate a target level based on the shared voltage and the voltage of the battery, and instantaneously pull the level of the error amplification signal to the target level; And A comparator, the first input terminal of the comparator is connected to a ramp signal generator, the second input terminal of the comparator is connected to the output terminal of the prediction circuit, and the comparator is configured to receive a ramp signal from the ramp signal generator, compare the error amplification signal with the ramp signal to output a comparison signal; Wherein in the accelerated boost mode, the control circuit controls the drive circuit to drive the upper bridge switch and the lower bridge switch according to the comparison signal, so as to allow the current of the battery to sequentially flow through the inductor and the upper bridge switch to the electrical device, and at the same time the current flows through the first resistor to the electrical device.

2. The instantaneous response improvement system with an error amplified signal prediction mechanism according to claim 1, wherein, The switching charger further includes a compensation circuit, the compensation circuit is connected between the prediction circuit and the second input terminal of the comparator, and is connected to the first resistor, the second resistor and the battery, the second resistor is connected between the inductor and the battery, and the compensation circuit is configured to output the error amplification signal according to the voltage or current value of one or more of the first resistor, the second resistor and the battery.

3. The instantaneous response improvement system with an error amplified signal prediction mechanism according to claim 2, wherein The switching charger further includes a feedback circuit, the compensation circuit is connected to the first resistor, the second resistor and the battery through the feedback circuit, and the feedback circuit is configured to feedback the voltage or current value of one or more of the first resistor, the second resistor and the battery to the compensation circuit.

4. The instantaneous response improvement system with an error amplified signal prediction mechanism according to claim 2, wherein, The prediction circuit includes a level prediction circuit and a level adjustment circuit, the level prediction circuit is coupled to the shared voltage and connected to the battery and the level adjustment circuit, the level adjustment circuit is connected to the current sensing circuit and the compensation circuit, the level prediction circuit calculates the target level based on the shared voltage and the voltage of the battery, and when the level adjustment circuit receives the boost mode trigger signal, instantaneously pulls the level of the error amplification signal to the target level.

5. The instantaneous response enhancement system with an error amplified signal prediction mechanism according to claim 4, characterized in that, The prediction circuit further includes a period calculation circuit, the level prediction circuit is connected to the shared voltage and the battery through the period calculation circuit, and the period calculation circuit is configured to divide the voltage of the battery by the shared voltage and multiply by the period of the ramp signal to calculate the on-time of the upper bridge switch, and the level prediction circuit predicts the target level based on the on-time.

6. The instantaneous response improvement system with an error amplification signal prediction mechanism according to claim 5, characterized in that, In the step-down mode, after the current flows from the input power supply through the first resistor, the current is divided into two paths and flows to the electrical device and the battery respectively, or the current flows to one of the electrical device and the battery.

7. An instantaneous response improvement method with an error amplified signal prediction mechanism, applicable to a switching charger. The switching charger includes an upper bridge switch, a lower bridge switch, a driving circuit, and a control circuit. The driving circuit is connected to the control circuit, the control terminal of the upper bridge switch, and the control terminal of the lower bridge switch. The first terminal of the upper bridge switch is coupled to a shared voltage, the first terminal of a first resistor, and an electrical device. The second terminal of the first resistor is connected to an input power supply. The first terminal and the second terminal of the lower bridge switch are respectively connected to the second terminal of the upper bridge switch and ground. A node between the second terminal of the upper bridge switch and the first terminal of the lower bridge switch is connected to a battery through an inductor, and it is characterized in that, The instantaneous response improvement method with an error amplification signal prediction mechanism includes the following steps: Power is supplied by the input power supply, and the current flows through the first resistor to the electrical device. Sense the current flowing through the first resistor. Judge whether the current is greater than the current threshold. If not, return to the previous step. If so, decide to enter the accelerated boost mode from the step-down mode and execute the next step. Calculate the target level based on the shared voltage and the voltage of the battery. Instantaneously pull the level of the error amplification signal to the target level. Compare the error amplification signal with the ramp signal to output a comparison signal. And According to the comparison signal, control the drive circuit to drive the upper bridge switch according to the boost mode trigger signal, so as to allow the current of the battery to flow through the inductor and the upper bridge switch to the electrical device in sequence, and at the same time the current is supplied to the electrical device.

8. The instantaneous response improvement method with an error amplified signal prediction mechanism according to claim 7, wherein The instantaneous response improvement method with an error amplification signal prediction mechanism further includes the following steps: Output the error amplification signal according to the voltage or current value of one or more of the first resistor, the second resistor connected between the inductor and the battery, and the battery. And Instantaneously pull the level of the error amplification signal to the target level.

9. The instantaneous response improvement method with an error amplification signal prediction mechanism according to claim 8, wherein The instantaneous response improvement method with an error amplification signal prediction mechanism further includes the following steps: Divide the voltage of the battery by the shared voltage and multiply by the period of the ramp signal to calculate the conduction time of the upper bridge switch; and Predict the target level according to the conduction time.

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