Voltage conversion circuit, power supply control method and electronic equipment

Abstract

The invention discloses a voltage conversion circuit, a power supply control method and electronic equipment. The voltage conversion circuit is used for providing working voltage for a first chip; the voltage conversion circuit comprises a voltage conversion module and a control module, and the voltage conversion module comprises a main voltage conversion unit and a plurality of slave voltage conversion units. The main voltage conversion unit is connected in parallel with the plurality of slave voltage conversion units; the control module is used for controlling the working states of the main voltage conversion unit and the plurality of slave voltage conversion units according to the output signal of the voltage conversion circuit; and the control module is also used for adjusting the control of the plurality of slave voltage conversion units when detecting that the voltage change at the power supply input pin of the first chip exceeds a threshold value.

Description

Technical Field

[0001] The present application relates to the field of power management technology, and in particular to a voltage conversion circuit, a power control method and an electronic device. Background Art

[0002] As the number and operating frequency of processor cores such as the central processing unit (CPU), graphics processing unit (GPU), and embedded neural network processing unit (NPU) of system-on-chip (SOC) continue to increase, the maximum load current and the slope and amplitude of the load current mutation increase synchronously when the processor is working, and the requirements for the load capacity and transient response capability of the power supply BUCK continue to increase. Figure 1 As shown in the figure, as the process of SOC chips continues to evolve, the operating voltage of processors continues to decrease, which puts higher requirements on the transient response drop of the power supply, and it is increasingly challenging for the power supply to meet the fluctuating demand. Traditional multi-phase BUCKs generally use nonlinear control methods of large and small inductors to improve transient response and optimize transient drop, such as Figure 2 As shown, the enabling of the BUCK depends on the feedback (FeedBack, FB) detection when the voltage on the output capacitor drops to a certain threshold. However, since the threshold is set too small, it is easy to be falsely triggered and affect the stability of the loop. The transient drop value is generally set large, which cannot meet the high requirements for transient response capability, resulting in low transient response capability. Summary of the invention

[0003] The embodiments of the present application are intended to provide a voltage conversion circuit, a power supply control method and an electronic device.

[0004] The technical solution of the embodiment of the present application is implemented as follows:

[0005] The embodiment of the present application provides a voltage conversion circuit, the voltage conversion circuit is used to provide an operating voltage to a first chip; the voltage conversion circuit includes a voltage conversion module and a control module, the voltage conversion module includes a main voltage conversion unit, and a plurality of slave voltage conversion units; the main voltage conversion unit is connected in parallel with the plurality of slave voltage conversion units;

[0006] The control module is used to control the working states of the master voltage conversion unit and the plurality of slave voltage conversion units according to the output signal of the voltage conversion circuit;

[0007] The control module is further configured to adjust control of the plurality of slave voltage conversion units when it is detected that a voltage change at a power input pin of the first chip exceeds a threshold.

[0008] The embodiment of the present application provides an electronic device, the electronic device comprising a second chip, a first chip, and a circuit printed board; the second chip comprises a voltage conversion circuit; a first connection path between a power output pin of the second chip and a power input pin of the first chip is disposed on the circuit printed board, the voltage conversion circuit is used to provide an operating voltage to the first chip through the first connection path; the voltage conversion circuit comprises a voltage conversion module and a control module, the voltage conversion module comprises a main voltage conversion unit, and a plurality of slave voltage conversion units; the main voltage conversion unit is connected in parallel with the plurality of slave voltage conversion units;

[0009] The control module is used to control the working states of the master voltage conversion unit and the plurality of slave voltage conversion units according to the output signal of the voltage conversion circuit;

[0010] The control module is further configured to adjust control of the plurality of slave voltage conversion units when it is detected that a voltage change at a power input pin of the first chip exceeds a threshold.

[0011] The embodiment of the present application provides a power supply control method, which is applied to a voltage conversion circuit, wherein the voltage conversion circuit is used to provide an operating voltage to a first chip; the voltage conversion circuit includes a voltage conversion module and a control module, wherein the voltage conversion module includes a master voltage conversion unit and a plurality of slave voltage conversion units; the master voltage conversion unit is connected in parallel with the plurality of slave voltage conversion units; the method includes:

[0012] Collecting an output signal of the voltage conversion circuit, and controlling the working states of the master voltage conversion unit and the plurality of slave voltage conversion units according to the output signal;

[0013] A voltage change at a power input pin of the first chip is detected, and when the detected voltage change exceeds a threshold, control of the plurality of slave voltage conversion units is adjusted.

[0014] The embodiment of the present application provides a voltage conversion circuit, a power control method and an electronic device, wherein the voltage conversion circuit is used to provide a working voltage to a first chip; the voltage conversion circuit includes a voltage conversion module and a control module, the voltage conversion module includes a main voltage conversion unit and a plurality of slave voltage conversion units; the main voltage conversion unit is connected in parallel with the plurality of slave voltage conversion units; the control module is used to control the working state of the main voltage conversion unit and the plurality of slave voltage conversion units according to the output signal of the voltage conversion circuit; the control module is also used to adjust the control of the plurality of slave voltage conversion units when it is detected that the voltage change at the power input pin of the first chip exceeds a threshold. The technical solution provided by the present application, on the basis of controlling the slave voltage conversion unit based on the output signal of the voltage conversion circuit, further adds the detection of the voltage change at the power input pin of the first chip, and controls the working state of the slave voltage conversion unit through the feedback of the voltage change at the power input pin. Since the power input pin of the first chip is closer to the load, the load change can be timely and obviously sensed, and the slave voltage conversion unit can be controlled in advance, which can improve the transient response capability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 An exemplary comparison diagram of changes between load and output voltage provided in the prior art;

[0016] Figure 2 An exemplary circuit structure diagram of a two-phase BUCK provided in the prior art;

[0017] Figure 3 A schematic diagram of an exemplary two-phase BUCK transient response process provided by the prior art;

[0018] Figure 4 A schematic diagram of an exemplary voltage conversion circuit provided in an embodiment of the present application Figure 1 ;

[0019] Figure 5 A schematic diagram of an exemplary voltage conversion circuit provided in an embodiment of the present application Figure 2 ;

[0020] Figure 6 A flowchart of a power control method provided in an embodiment of the present application;

[0021] Figure 7 A schematic diagram of a flow chart of an exemplary transient response of a voltage conversion circuit provided in an embodiment of the present application;

[0022] Figure 8 A schematic diagram of an exemplary control voltage conversion circuit provided in an embodiment of the present application Figure 1 ;

[0023] Fig. 9 A schematic diagram of an exemplary control voltage conversion circuit provided in an embodiment of the present application Figure 2 . DETAILED DESCRIPTION

[0024] The technical solution in the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are only used to explain the related application, rather than to limit the application. It should also be noted that, for ease of description, only the parts related to the related application are shown in the accompanying drawings.

[0025] In traditional multi-phase buck circuits, nonlinear control methods of large and small inductors are generally used to improve transient response and optimize transient drop. Figure 2 As shown, taking a two-phase BUCK 20 as an example, a large inductor 21 corresponds to a low-frequency BUCK 22 for optimizing light-load efficiency, a small inductor 23 corresponds to a high-frequency BUCK 24 for optimizing transient drop, and the two-phase BUCK can provide an output voltage 26 for a load 25, a feedback point 27 (FeedBack, FB) of the two-phase BUCK is provided at the output voltage 26, and a plurality of output capacitors 28: Cout-Coutn (only two capacitors are shown as an example in the figure).

[0026] For example, the transient response principle of the conventional two-phase BUCK circuit is as follows: Figure 3 As shown, combined Figure 1 , Figure 2 and Figure 3 , when the load is 25(I 25 ) When a change from light load to heavy load occurs (see Figure 1 The current I 25 The jump 11, and Figure 3 The current I 25 Jump 31), at this time, because the transient response of the output voltage cannot instantly follow the sudden change of the load, the output voltage 26 (V 26 ) will fall (see Figure 1 The fall in 12, and Figure 3 The feedback point 27 detects the drop in the output voltage 26 and generates a positive signal when the output voltage 26 drops to a certain value (Vth) (see Figure 3 After the drop 33 in the high frequency BUCK24 is enabled (see Figure 3The inductor current rises to replenish energy, and after a certain period of time, the output voltage 26 recovers. However, since the high-frequency BUCK 24 is enabled by the feedback point 27 to detect that the voltage 26 on the output capacitor 28 drops to a certain threshold, the transient drop of the output voltage 26 must exist, and considering that the threshold is set too small, it is easy to trigger by mistake and affect the loop stability, so the threshold cannot be too small, resulting in a generally large transient drop value, which cannot guarantee the high requirements for transient response capability, resulting in a low transient response capability. Of course, when the load 25 changes from heavy load to light load (see Figure 1 The jump in 13), the output voltage 26 (V 26 ) appears to be up (see Figure 1 At this time, the high frequency BUCK 24 needs to be turned off so that the output voltage 26 can be restored after a certain period of time.

[0027] from Figure 3 The output voltage V 26 It can be seen from the delay time 34 between the drop and the enablement of BUCK24 that the traditional multi-phase buck circuit requires a long time to enable the high-frequency BUCK24. Therefore, the transient response capability of the traditional multi-phase buck circuit is defective and cannot meet the high requirements for transient response capability, and the transient response capability is low.

[0028] The present application provides a voltage conversion circuit, which, compared with the above-mentioned traditional multi-phase buck circuit, adds a circuit for detecting the voltage at the power input pin of the first chip. For example, Figure 4 As shown, the voltage conversion circuit 401 is used to provide a working voltage to the first chip 404; the voltage conversion circuit 401 includes a voltage conversion module 405 and a control module 406, the voltage conversion module 405 includes a main voltage conversion unit 407, and a plurality of slave voltage conversion units 408; the main voltage conversion unit 407 is connected in parallel with the plurality of slave voltage conversion units 408;

[0029] A control module 406, used to control the working states of a master voltage conversion unit 407 and a plurality of slave voltage conversion units 408 according to an output signal of the voltage conversion circuit 401;

[0030] The control module 406 is further configured to adjust the control of the plurality of slave voltage conversion units 408 when it is detected that the voltage change at the power input pin 409 of the first chip 404 exceeds a threshold.

[0031] In the embodiments of the present application, Figure 4As shown, the voltage conversion circuit 401 is included in the second chip 402, and the voltage conversion circuit 401 is connected to the first chip 404 through the power output pin 403 of the second chip 402, and the voltage conversion circuit 401 provides the working voltage for the first chip 404 through the power output pin 403 of the second chip 402; the control module 406 is respectively connected to the power output pin 403 of the second chip 402, the power input pin 409 of the first chip 404, and the voltage conversion module 405, and is used to control the working status of the main voltage conversion unit 407 and multiple slave voltage conversion units 408 according to the output signal of the voltage conversion circuit 401, and detect the voltage change at the power input pin 409 of the first chip 404, and adjust the control of the multiple slave voltage conversion units 408 when it is detected that the voltage change at the power input pin 409 of the first chip 404 exceeds the threshold. Among them, the first chip 404 can be a system-on-chip SOC, and the second chip 402 can be a voltage conversion chip. The specific first chip 404 and the second chip 402 can be set according to actual conditions and application requirements, and this application does not limit this.

[0032] In an embodiment of the present application, whether the multiple slave voltage conversion units 408 in the voltage conversion circuit 401 are enabled depends on the output signal of the voltage conversion circuit 401 and the voltage change at the power input pin 409 of the first chip 404. In this way, the dual feedback circuit can jointly control the working status of the multiple slave voltage conversion units 408, thereby improving the rapidity of transient response.

[0033] In the embodiments of the present application, Figure 4 As shown, the power input pin 409 is actually the power pin at the bare die of the unpackaged first chip 404. The voltage change at the power input pin 409 of the first chip 404 detected by the voltage conversion circuit 401 is more sensitive than the change of the output signal of the voltage conversion circuit 401. This is because the power input pin 409 is closer to the load 4010 of the first chip 404. There is no need to consider the equivalent chip package integrated inductor 4011 and chip package integrated resistor 4012 after the first chip 404 is packaged, and there is no need to consider the buffering effect of the printed circuit board equivalent resistor 4013, the printed circuit board equivalent inductor 4014, and the output capacitor 4015 on the change of the load 4010. The change of the output signal of the voltage conversion circuit 401 is perceived earlier, so that the voltage conversion circuit 401 can respond to the change of the load 4010 in time, thereby improving the transient response capability.

[0034] In some embodiments, Figure 4 As shown, the control module 406 includes a first control unit 4016 and a second control unit 4017;

[0035] A first control unit 4016, configured to output a first control signal based on the output voltage of the voltage conversion circuit 401, and control the working states of the master voltage conversion unit 407 and the plurality of slave voltage conversion units 408;

[0036] The second control unit 4017 is used to output a second control signal based on the output currents of the master voltage conversion unit 407 and the plurality of slave voltage conversion units 408 , so as to control the working states of the plurality of slave voltage conversion units 408 .

[0037] In the embodiments of the present application, Figure 4 As shown, the control module 406 includes a first control unit 4016 connected to the power output pin 403 of the second chip 402 to form a first feedback point FB1, and is also connected to the voltage conversion module 405 to output a first control signal based on the output voltage of the voltage conversion circuit 401 to control the working status of the main voltage conversion unit 407 and multiple slave voltage conversion units 408 included in the voltage conversion module 405.

[0038] In the embodiments of the present application, Figure 4 As shown, one end of the second control unit 4017 included in the control module 406 is respectively connected to the main voltage conversion unit 407 and multiple slave voltage conversion units 408 included in the voltage conversion module 405, and the other end is respectively connected to the multiple slave voltage conversion units 408 included in the voltage conversion module 405, and is used to output a second control signal based on the output current of the main voltage conversion unit 407 and the multiple slave voltage conversion units 408, so as to control the working status of the multiple slave voltage conversion units 408.

[0039] In the embodiments of the present application, Figure 4 As shown, the first control unit 4016 includes an error amplifier 4018, a comparator 4019, a first resistor R1, and a second resistor R2. Among them, one end of the first resistor R1 is connected to the power pin 403 of the second chip 402 including the voltage conversion circuit 401, and the other end is connected to the second resistor R2 and the first input end of the error amplifier 4018 respectively; one end of the second resistor R2 is connected to the first resistor R1 and the first input end of the error amplifier 4018 respectively, and the other end is grounded; the second input end of the error amplifier 4018 is a reference point for inputting a first reference voltage, and the output end of the error amplifier 4018 is connected to the first input end of the comparator 4019; the second input end of the comparator 4019 is a reference point for inputting a sawtooth wave, and the output end of the comparator 4019 is connected to the voltage conversion module 405. The first reference voltage set in the comparator 4019 is related to the output voltage of the first resistor R1, the second resistor R2, and the power pin 403 of the second chip 402. The specific preset threshold Vref1 can be set according to actual conditions and application requirements, and this application does not limit this.

[0040] Exemplarily, under the working condition of constant load (constant light load or constant heavy load), the first control unit 4016 detects the output voltage of the voltage conversion circuit 401, and inputs the output voltage into the error amplifier 4018 and the comparator 4019 included in the first control unit 4016 to generate a pulse width modulation (PWM) control signal, and combines with the phase shift control circuit 4020 to control the upper and lower MOS tubes 4022 of multiple slave voltage conversion units 408 to be turned on and off by driving Driver 4021 to drive 1 / 2 / … / n.

[0041] In an embodiment of the present application, the control module 406 also includes a second control unit 4017 (current detection unit), one end of the second control unit 4017 is respectively connected to the output ends of the main voltage conversion unit 407 and multiple slave voltage conversion units 408 included in the voltage conversion module 405, and the other end is connected to the input end of the OR operation unit 4023; the second control unit 4017 is used to output a second control signal based on the output current of the main voltage conversion unit 407 and the output current of each of the multiple slave voltage conversion units 408 to control the working state of the multiple slave voltage conversion units 408.

[0042] Exemplarily, the current detection unit 4017 is used to detect the output current of each voltage conversion unit (master voltage conversion unit or slave voltage conversion unit), and to control the enablement and shutdown of the pulse width modulation control signal buffer 4024 of each slave voltage conversion unit 4026 by detecting the magnitude of the inductor current (equivalent load current), thereby controlling the enablement and shutdown of each slave voltage conversion unit 4026. At the same time, by detecting the output current of each voltage conversion unit, the current sharing control of the inductor current of each voltage conversion unit can be performed.

[0043] In some embodiments, Figure 4 As shown, the control module 406 may also include: a third control unit 4025, the third control unit 4025 is used to detect the voltage value at the power input pin 409, and output a third control signal when the voltage value is lower than a preset voltage value, to control at least one slave voltage conversion unit 4026 among the multiple slave voltage conversion units 408 to be enabled.

[0044] In the embodiments of the present application, Figure 4 As shown, one end of the third control unit 4025 is connected to the power input pin 409 to form a second feedback point FB2, and the other end is connected to the OR gate 4023, which is used to detect the voltage value at the power input pin 409, and then compare it with the preset voltage value. If the voltage value is lower than the preset voltage value, a third control signal is output to control at least one slave voltage conversion unit 4026 among the multiple slave voltage conversion units 408 to be enabled.

[0045] In addition, if the voltage value is lower than the preset voltage value, the voltage conversion circuit 401 outputs a third control signal to control at least one slave voltage conversion unit 4026 among the multiple slave voltage conversion units 408 to be enabled. As for whether at least one slave voltage conversion unit 4026 among the multiple slave voltage conversion units 408 is enabled or all the multiple slave voltage conversion units are enabled, or whether the multiple slave voltage conversion units 408 are enabled in sequence, it can be set according to the actual application scenario and application requirements, and this application does not limit this.

[0046] In some embodiments, Figure 4 As shown, the third control unit 4025 includes: a comparison subunit 4027 and a trigger subunit 4028; the comparison subunit 4027 is used to output a comparison signal when the voltage value is lower than the preset voltage value, so as to control the working state of the trigger subunit 4028; the output ends of the trigger subunit 4028 and the second control unit 4017 are respectively connected to the two input ends of the OR operation unit 4023, and are connected to the slave voltage conversion unit 408 through the OR operation unit 4023; the trigger subunit 4028 is used to output an enable signal for at least one voltage conversion unit 4026 based on the comparison signal.

[0047] In the embodiments of the present application, Figure 4 As shown, the first input end of the comparison subunit 4027 is connected to the power input pin 409 via the third resistor R3, the second input end of the comparison subunit 4027 is the preset voltage value Vref2, the output end of the comparison subunit 4027 is connected to the set end S of the trigger subunit 4028, one end of the fourth resistor R4 is connected to the first input end of the comparison subunit 4027, and the other end is grounded; the comparison subunit 4027 is used to compare the voltage value at the power input pin 409 with the preset voltage value, and then output a comparison signal when the voltage value is lower than the preset voltage value to control the working state of the trigger subunit 4028. Among them, the setting of the preset voltage value Vref2 is related to the third resistor R3, the fourth resistor R4, and the voltage value at the power input pin. The specific preset voltage value Vref2 can be set according to the actual situation and application requirements, and this application does not limit this;

[0048] In the embodiments of the present application, Figure 4 As shown, the output ends of the trigger subunit 4028 and the second control unit 4017 are respectively connected to the two input ends of the OR operation unit 4023, and are connected to the slave voltage conversion unit 408 through the OR operation unit 4023. The trigger subunit 4028 is used to output an enable signal for at least one voltage conversion unit 4026 based on the comparison signal.

[0049] In the embodiments of the present application, Figure 4As shown, when the load is light, the main voltage conversion unit 407 works, and the multiple slave voltage conversion units 408 do not work. When the load 4010 changes from light load to heavy load, the voltage value at the power input pin 409 of the first chip 404 will produce a large high-frequency drop, that is, the voltage value is lower than the preset voltage value. At this time, the comparison subunit 4027 will output a comparison signal. For example, the comparison signal can be 1, indicating that the voltage value is lower than the preset voltage value. Then, at this time, the set end S input of the trigger subunit 4028 is 1, then, the output end Q of the trigger subunit 4028 will output an enable signal: 1. Since the output end Q of the trigger subunit 4028 is connected to the output end of the second control unit 4017 through the OR operation unit 4023, when the output end Q of the trigger subunit 4028 outputs the enable signal, at least one voltage conversion unit 4026 is enabled. Among them, the comparison subunit 4027 can be a comparator, and the trigger subunit 4028 can be an RS trigger.

[0050] Therefore, a new voltage value (FB2) at the power input pin 409 is added to detect the voltage drop and output a comparison signal through the comparison subunit 4027, triggering the trigger subunit 4028 to be set to 1, thereby controlling multiple slave voltage conversion units 408 to be enabled, replenishing the energy required for the large load in advance, thereby avoiding a large transient drop in the output voltage. Compared with the multiple output capacitors that need to be set at the output voltage in the related technology, the present application can reduce the number of output capacitors used, thereby bringing cost and board area benefits, and after the transient drop optimization, the margin of the minimum voltage Vmin required for the operation of the first chip is larger. Combined with the adaptive voltage scaling (AVS) technology of the first chip SOC, the Vmin voltage can be further reduced, thereby bringing SOC power consumption benefits.

[0051] In some embodiments, Figure 4 As shown, the third control unit 4025 also includes: a time control subunit 4029; the time control subunit 4029 is used to determine whether to start timing based on the trigger signal, and when the timing starts and the timing time reaches a preset duration, output a trigger control signal to control the trigger subunit 4028 to output a shutdown signal for multiple slave voltage conversion units 408.

[0052] In the embodiments of the present application, Figure 4As shown, the output end of the time control subunit 4029 (constant time generator) is connected to the reset end R of the trigger subunit 4028, and the input end of the time control subunit 4029 is connected to the output end Q of the trigger subunit 4028. If the enable signal output by the output end Q of the trigger subunit 4028 is 1, the time control subunit 4029 starts timing, and outputs a trigger control signal when the timing starts and the timing time reaches a preset duration. Exemplarily, the trigger control signal can be 1. At this time, the input of the reset end R of the trigger subunit 4028 is 1, and the input of the set end S of the trigger subunit 4028 is 0 when the voltage value is higher than or equal to the preset voltage value, so that the output end Q of the trigger subunit 4028 outputs a shutdown signal: 0. In this way, the shutdown of multiple slave voltage conversion units 408 can be controlled.

[0053] The time control subunit 4029 is set in this application to consider that if the first drop duration is short, that is, the voltage value quickly exceeds or equals the preset voltage value, in order to prevent the multiple slave voltage conversion units 408 from being enabled for a short duration and failing to achieve the effect of optimizing the transient state, the time control subunit 4029 is added here to control the minimum enabling time of the multiple slave voltage conversion units 408 (slave BUCK). Of course, if it is not Figure 4 The time control subunit 4029 may be added to the position in the figure, or the time control subunit 4029 may be added to multiple slave voltage conversion units 408 (slave BUCKs), or the voltage value at the power input pin 409 may be set to control multiple slave voltage conversion units 408 (slave BUCKs) to be turned off after rising to a certain value, so that the control of the minimum enable time of multiple slave voltage conversion units 408 (slave BUCKs) may be realized. The specific implementation of the control of the minimum enable time of multiple slave voltage conversion units 408 (slave BUCKs) is not limited to the above-mentioned implementable manner.

[0054] The embodiment of the present application provides a voltage conversion circuit, the voltage conversion circuit is used to provide a working voltage to a first chip; the voltage conversion circuit includes a voltage conversion module and a control module, the voltage conversion module includes a main voltage conversion unit, and a plurality of slave voltage conversion units; the main voltage conversion unit is connected in parallel with the plurality of slave voltage conversion units; the control module is used to control the working state of the main voltage conversion unit and the plurality of slave voltage conversion units according to the output signal of the voltage conversion circuit; the control module is also used to adjust the control of the plurality of slave voltage conversion units when it is detected that the voltage change at the power input pin of the first chip exceeds the threshold. The voltage conversion circuit provided by the present application, on the basis of controlling the slave voltage conversion unit based on the output signal of the voltage conversion circuit, further adds the detection of the voltage change at the power input pin of the first chip, and controls the working state of the slave voltage conversion unit through the feedback of the voltage change at the power input pin. Since the power input pin of the first chip is closer to the load, the load change can be timely and obviously sensed, and the slave voltage conversion unit can be controlled in advance, which can improve the transient response capability.

[0055] The present application embodiment provides an electronic device. Figure 5 As shown, the electronic device 501 includes a second chip 502, a first chip 503, and a printed circuit board 504; the second chip 502 includes a voltage conversion circuit 505; a first connection path 508 between a power output pin 506 of the second chip 502 and a power input pin 507 of the first chip 503 is disposed on the printed circuit board, and the voltage conversion circuit 505 is used to provide an operating voltage to the first chip 503 through the first connection path 508; the voltage conversion circuit 505 includes a voltage conversion module 509 and a control module 510, and the voltage conversion circuit 505 includes a voltage conversion module 509 and a control module 510. The conversion module 509 includes a main voltage conversion unit 511 and multiple slave voltage conversion units 512; the main voltage conversion unit 511 is connected in parallel with the multiple slave voltage conversion units 512; the control module 510 is used to control the working status of the main voltage conversion unit 511 and the multiple slave voltage conversion units 512 according to the output signal of the voltage conversion circuit 505; the control module 510 is also used to adjust the control of the multiple slave voltage conversion units 512 when it is detected that the voltage change at the power input pin 507 of the first chip 503 exceeds the threshold.

[0056] In the embodiments of the present application, Figure 5As shown, the electronic device 501 includes a circuit printed board 504, and a first connection path 508 is provided on the circuit printed board 504 between the power output pin 506 of the second chip 502 and the power input pin 507 of the first chip 503, so that the voltage conversion circuit 505 provides the working voltage to the first chip 503 through the first connection path 508. In addition, the voltage conversion circuit 505 obtains the output signal of the second chip 502 through the control module 510, and then controls the working state of the main voltage conversion unit 511 and the plurality of slave voltage conversion units 512 based on the output signal, and also detects the voltage change at the power input pin 507 of the first chip 503 through the control module 510, so as to adjust the control of the plurality of slave voltage conversion units 512 when the voltage change exceeds the threshold.

[0057] In some embodiments, Figure 5 As shown, the second chip 502 also includes a first pin 513 and a second pin 513; the circuit printed board 504 is also provided with a second connection path 515 between the first pin 513 and the power output pin 506 of the second chip 502, and the first pin 513 is used to detect the output voltage of the second chip 502 through the second connection path 515; the circuit printed board 504 is also provided with a third connection path 516 between the second pin 514 and the power input pin 507 of the first chip 503, and the second pin 514 is used to detect the voltage value at the power input pin 507 through the third connection path 516.

[0058] In the embodiments of the present application, Figure 5 As shown, the first pin 513 included in the second chip 502 is used to detect the output voltage of the second chip 502 through the second connection path 515, and the second pin 514 included in the second chip 502 is used to detect the voltage value at the power input pin 507 through the third connection path 516. In this way, dual feedback to the load 517 is achieved through the second connection path 515 and the third connection path 516. In addition, Figure 5 Also provided are a chip package integrated inductor 518 and a chip package integrated resistor 519 existing after the first chip 503 is packaged, a printed circuit board equivalent resistor 520 and a printed circuit board equivalent inductor 521 on the printed circuit board 504 (here only for equivalent illustration, used to represent the equivalent resistance and equivalent inductance of various devices in the path), an output capacitor 522, a bare crystal parasitic resistor 523 and a bare crystal parasitic capacitor 524 of the first chip 503 (here only for equivalent illustration, used to represent the parasitic resistance and parasitic inductance generated by various devices in the chip), and an inductor 525 corresponding to each voltage conversion unit included in the control module 509.

[0059] An embodiment of the present application provides an electronic device, which includes a second chip, a first chip, and a circuit printed board; the second chip includes a voltage conversion circuit; a first connection path between a power pin of the second chip and a power pin of the first chip is disposed on the circuit printed board, and the voltage conversion circuit is used to provide an operating voltage to the first chip through the first connection path; the voltage conversion circuit includes a voltage conversion module and a control module, and the voltage conversion module includes a main voltage conversion unit and a plurality of slave voltage conversion units; the main voltage conversion unit is connected in parallel with the plurality of slave voltage conversion units; the control module is used to control the working states of the main voltage conversion unit and the plurality of slave voltage conversion units according to an output signal of the second chip; the control module is also used to adjust the control of the plurality of slave voltage conversion units when it is detected that the voltage change at the power input pin of the first chip exceeds a threshold. The electronic device provided by the present application, on the basis of controlling the slave voltage conversion unit based on the output signal of the second chip, further adds the detection of voltage changes at the power input pin of the first chip, and controls the working state of the slave voltage conversion unit through feedback of the voltage changes at the power input pin. Since the power input pin of the first chip is closer to the load, the load changes can be sensed in a timely and obvious manner, and the slave voltage conversion unit can be controlled in advance, which can improve the transient response capability.

[0060] The embodiment of the present application provides a power supply control method, which is applied to a voltage conversion circuit, wherein the voltage conversion circuit is used to provide an operating voltage to a first chip; the voltage conversion circuit includes a voltage conversion module and a control module, wherein the voltage conversion module includes a main voltage conversion unit and a plurality of slave voltage conversion units; the main voltage conversion unit is connected in parallel with the plurality of slave voltage conversion units; Figure 6 As shown, the power control method includes the following steps S601 to S602:

[0061] Step S601: collecting an output signal of a voltage conversion circuit, and controlling the working states of a master voltage conversion unit and a plurality of slave voltage conversion units according to the output signal.

[0062] In an embodiment of the present application, the voltage conversion circuit collects the output signal of the voltage conversion circuit, and controls the working state of the main voltage conversion unit and the plurality of slave voltage conversion units according to the output signal. Figure 4 and Figure 5 The voltage conversion circuit (401 or 505) collects the output signal of the second chip (402 or 502) through the control module (406 or 510) to feedback the working status of the main voltage conversion unit (407 or 511) and multiple slave voltage conversion units (408 or 512) included in the control voltage conversion circuit (401 or 505).

[0063] In the embodiments of the present application, Figure 4 , Figure 5 and Figure 7 In the case of constant load, only the main voltage conversion unit (407 or 511) (BUCK1) works. However, when the load (4010 or 517) changes from light load to heavy load, the output voltage of the voltage conversion circuit (401 or 505) through the second chip (402 or 502) will drop for the first time. The first drop is a high-frequency drop caused by parasitic inductance, followed by a second drop. The second drop is a low-frequency drop caused by the response delay of the PMU in the control module (406 or 510). Figure 7 It can be seen that the output voltage Vout of the second chip (402 or 502) has a drop between the first drop and the second drop. This is because of the effect of parasitic inductance and capacitance. When the load (4010 or 517) jumps, it will cause the parasitic inductance and capacitance to discharge and cause a drop, but it will not drop back to the previous voltage value.

[0064] Step S602: Detect a voltage change at a power input pin of the first chip, and adjust control of a plurality of slave voltage conversion units when the detected voltage change exceeds a threshold.

[0065] In the embodiments of the present application, Figure 4 and Figure 5 The voltage conversion circuit (401 or 505) detects the voltage change at the power input pin (409 or 507) of the first chip (404 or 503), and adjusts the control of multiple slave voltage conversion units (408 and 512) when the detected voltage change exceeds a threshold.

[0066] In the embodiments of the present application, Figure 4 , Figure 5 and Figure 7 Since the power input pin (409 or 507) is closer to the load (4010 or 517), the voltage change at the power input pin (409 or 507) of the first chip (404 or 503) detected by the voltage conversion circuit (401 or 505) will be more obvious. Figure 7 It can be seen that the first drop at the power input pin (409 or 507) Figure 7 74) is obviously earlier than the first drop of the output voltage of the second chip (402 or 502), so that the multiple slave voltage conversion units (408 and 512) can be identified and enabled in advance. Since the enabling of the multiple slave voltage conversion units (408 and 512) is decoupled from the low-frequency transient drop of the output voltage Vout and enabled in advance, the transient drop of the voltage conversion circuit (401 or 505) is greatly reduced. Among them, Figure 7The dotted line of the output voltage Vout in FIG. 1 represents the second transient drop of Vout if the voltage change (Vbump) at the power input pin 409 is not detected, and the solid line represents the second transient drop of Vout after the voltage change at the power input pin 409 is detected and the drop is recognized and enabled in advance. In addition, the second drop will also occur at the power input pin (409 or 507) (see Figure 7 75), since the power input pin (409 or 507) is only buffered by the parasitic resistance (4031 or 523) and parasitic capacitance (4030 or 524) of the first chip 503, the second drop ( Figure 7 75) is also quite obvious.

[0067] Compared with the related art, the present application adds feedback of the voltage change at the power input pin of the first chip on the basis of controlling the slave voltage conversion unit based on the output signal of the second chip, so as to control the working state of the slave voltage conversion unit. Since the power input pin of the first chip is closer to the load, it can sense the voltage change in time, and then control the slave voltage conversion unit as soon as possible, thereby improving the transient response capability.

[0068] In some embodiments, the output signal includes an output voltage, and the voltage conversion circuit performs the above step S601 of "controlling the working states of the main voltage conversion unit and the plurality of slave voltage conversion units according to the output signal", such as Figure 8 As shown, the following steps S801 to S803 are included:

[0069] Step S801: When the output voltage is kept constant, keep the working state of multiple slave voltage conversion units.

[0070] For example, in combination Figure 4 , Figure 5 and Figure 7 For constant load (light load) I load In the case of only the main voltage conversion unit (407 or 511) (BUCK1) is enabled, or the constant load (heavy load) I load In the case of, the master voltage conversion unit (407 or 511) and multiple slave voltage conversion units (408 and 512) (BUCKn) are enabled at the same time, then, corresponding to Figure 7 In the figure, 71 means when the load is light, the main voltage conversion unit (407 or 511) is enabled, and 72 means when the load is heavy, the main voltage conversion unit (407 or 511) and multiple slave voltage conversion units (408 and 512) are enabled at the same time.

[0071] Step S802 : when the output voltage is in a falling state, controlling multiple slave voltage conversion units to be enabled based on the output voltage.

[0072] In the embodiment of the present application, if the output voltage is in a falling state (see Figure 1 12 and Figure 7 73), multiple slave voltage conversion units are required (see Figure 4 408 and Figure 5 512) in is enabled.

[0073] Step S803 : when the output voltage is in an overshoot state, control a plurality of slave voltage conversion units to be turned off based on the output voltage.

[0074] In the embodiments of the present application, Figure 1 As shown, if the output voltage is in an overshoot state (see Figure 1 In this case, multiple slave voltage conversion units need to be turned off (see Figure 4 408 and Figure 5 512 in the above table).

[0075] In some embodiments, the voltage conversion circuit performs the above step S602 of "adjusting the control of the plurality of slave voltage conversion units when the detected voltage change exceeds the threshold value", such as Fig. 9 As shown, the following steps S901 to S904 are included:

[0076] Step S901 : when the voltage value at the power input pin is less than a preset voltage value, control a plurality of slave voltage conversion units to start enabling, and set a preset duration for enabling the plurality of slave voltage conversion units.

[0077] In the embodiments of the present application, Figure 4 and Figure 5 Considering the voltage value change at the power input pin (409 or 507), the duration of enabling the slave voltage conversion unit (408 or 512) may be short and fail to achieve the effect of optimizing the transient state, so the voltage conversion circuit (401 or 505) sets multiple preset durations for enabling the slave voltage conversion unit (408 or 512). The preset duration here can be set according to the actual scenario and application requirements, and this application does not limit this.

[0078] Step S902 : when the enabling time of the plurality of slave voltage conversion units reaches a preset time length, control the plurality of slave voltage conversion units to be turned off.

[0079] In the embodiments of the present application, Figure 4 and Figure 5 If the enabling time of the multiple slave voltage conversion units (408 or 512) reaches a preset time length, the voltage conversion circuit (401 or 505) can control the multiple slave voltage conversion units (408 or 512) to be turned off.

[0080] Step S903: When the voltage value is greater than the preset voltage value and the enabling time of the plurality of slave voltage conversion units reaches a preset time length, the plurality of slave voltage conversion units are controlled to be turned off.

[0081] In the embodiments of the present application, Figure 4 and Figure 5 If the voltage value is greater than the preset voltage value, and the enabling time of multiple slave voltage conversion units (408 or 512) also reaches the preset duration, it means that multiple slave voltage conversion units do not need to be enabled. At this time, the voltage conversion circuit (401 or 505) controls multiple slave voltage conversion units (408 or 512) to be turned off. The setting of the preset duration is the same as above and will not be repeated here.

[0082] Step S904: When the voltage value is equal to the preset voltage value, the working state of the plurality of slave voltage conversion units is maintained.

[0083] In the embodiments of the present application, Figure 4 and Figure 5 If the voltage value is equal to the preset voltage value, it indicates a constant load, and the voltage conversion circuit (401 or 505) only needs to maintain the working state of the multiple slave voltage conversion units (408 or 512).

[0084] The embodiment of the present application provides a power control method, which is applied to a voltage conversion circuit, wherein the voltage conversion circuit is used to provide a working voltage to a first chip through a power pin of a voltage change chip; the voltage conversion circuit includes a main voltage conversion unit and a plurality of slave voltage conversion units; the main voltage conversion unit is connected in parallel with the plurality of slave voltage conversion units; the method includes: collecting an output signal of a second chip, and controlling the working state of the main voltage conversion unit and the plurality of slave voltage conversion units according to the output signal; detecting a voltage change at a power input pin of the first chip, and adjusting the control of the plurality of slave voltage conversion units when the detected voltage change exceeds a threshold. The power control method provided by the present application, on the basis of controlling the slave voltage conversion unit based on the output signal of the second chip, further adds the detection of the voltage change at the power input pin of the first chip, and controls the working state of the slave voltage conversion unit through the feedback of the voltage change at the power input pin. Since the power input pin of the first chip is closer to the load, the load change can be timely and obviously sensed, and the slave voltage conversion unit can be controlled in advance, which can improve the transient response capability.

[0085] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A voltage conversion circuit, the voltage conversion circuit is used to provide a working voltage to a first chip; the voltage conversion circuit comprises a voltage conversion module and a control module, the voltage conversion module comprises a master voltage conversion unit and a plurality of slave voltage conversion units; the master voltage conversion unit is connected in parallel with the plurality of slave voltage conversion units; The control module is used to control the working states of the master voltage conversion unit and the plurality of slave voltage conversion units according to the output signal of the voltage conversion circuit; The control module is further configured to adjust control of the plurality of slave voltage conversion units when it is detected that a voltage change at a power input pin of the first chip exceeds a threshold.

2. The voltage conversion circuit according to claim 1, wherein the control module comprises a first control unit and a second control unit; The first control unit is used to output a first control signal based on the output voltage of the voltage conversion circuit to control the working states of the master voltage conversion unit and the plurality of slave voltage conversion units; The second control unit is used to output a second control signal based on the output currents of the master voltage conversion unit and the plurality of slave voltage conversion units to control the working states of the plurality of slave voltage conversion units.

3. The voltage conversion circuit according to claim 2, wherein the control module further comprises: The third control unit, The third control unit is used to detect the voltage value at the power input pin, and output a third control signal when the voltage value is lower than a preset voltage value, to control at least one of the multiple slave voltage conversion units to be enabled.

4. The voltage conversion circuit according to claim 3, wherein the third control unit comprises: comparison subunit and trigger subunit; The comparison subunit is used to output a comparison signal when the voltage value is lower than the preset voltage value, so as to control the working state of the trigger subunit; The output ends of the trigger sub-unit and the second control unit are respectively connected to two input ends of an OR operation unit, and are connected to the slave voltage conversion unit through the OR operation unit; The trigger subunit is used to output an enable signal for the at least one voltage conversion unit based on the comparison signal.

5. The voltage conversion circuit according to claim 4, wherein the third control unit further comprises: Time control subunit; The time control subunit is used to determine whether to start timing based on the trigger signal, and when the timing starts and the timing time reaches a preset duration, output a trigger control signal to control the trigger subunit to output a shutdown signal for the multiple slave voltage conversion units.

6. An electronic device, comprising a second chip, a first chip, and a printed circuit board; the second chip comprises a voltage conversion circuit; a first connection path between a power output pin of the second chip and a power input pin of the first chip is disposed on the printed circuit board, and the voltage conversion circuit is used to provide an operating voltage to the first chip through the first connection path; the voltage conversion circuit comprises a voltage conversion module and a control module, the voltage conversion module comprises a main voltage conversion unit, and a plurality of slave voltage conversion units; the main voltage conversion unit is connected in parallel with the plurality of slave voltage conversion units; The control module is used to control the working states of the master voltage conversion unit and the plurality of slave voltage conversion units according to the output signal of the voltage conversion circuit; The control module is further configured to adjust control of the plurality of slave voltage conversion units when it is detected that a voltage change at a power input pin of the first chip exceeds a threshold.

7. The electronic device according to claim 6, wherein the second chip further comprises a first pin and a second pin; The circuit printed board is also provided with a second connection path between the first pin and the power output pin of the second chip, and the first pin is used to detect the output voltage of the second chip through the second connection path; The circuit printed board is also provided with a third connection path between the second pin and the power input pin of the first chip, and the second pin is used to detect the voltage value at the power input pin through the third connection path.

8. A power control method, applied to a voltage conversion circuit, the voltage conversion circuit is used to provide an operating voltage to a first chip; the voltage conversion circuit comprises a voltage conversion module and a control module, the voltage conversion module comprises a master voltage conversion unit, and a plurality of slave voltage conversion units; The master voltage conversion unit is connected in parallel with the plurality of slave voltage conversion units; the method comprising: Collecting an output signal of the voltage conversion circuit, and controlling the working states of the master voltage conversion unit and the plurality of slave voltage conversion units according to the output signal; A voltage change at a power input pin of the first chip is detected, and when the detected voltage change exceeds a threshold, control of the plurality of slave voltage conversion units is adjusted.

9. The method according to claim 8, wherein the output signal comprises an output voltage, and the step of controlling the working states of the master voltage conversion unit and the plurality of slave voltage conversion units according to the output signal comprises: When the output voltage is kept constant, maintaining the working state of the plurality of slave voltage conversion units; When the output voltage is in a falling state, controlling the plurality of slave voltage conversion units to be enabled based on the output voltage; When the output voltage is in an overshoot state, the plurality of slave voltage conversion units are controlled to be turned off based on the output voltage.

10. The method according to claim 8, wherein when the detected voltage variation exceeds a threshold, adjusting the control of the plurality of slave voltage conversion units comprises: When the voltage value at the power input pin is less than a preset voltage value, controlling the plurality of slave voltage conversion units to start enabling, and setting a preset duration for enabling the plurality of slave voltage conversion units; When the enabling time of the plurality of slave voltage conversion units reaches a preset time length, controlling the plurality of slave voltage conversion units to be turned off; When the voltage value is greater than the preset voltage value and the enabling time of the plurality of slave voltage conversion units reaches the preset time length, controlling the plurality of slave voltage conversion units to be turned off; When the voltage value is equal to the preset voltage value, the working state of the plurality of slave voltage conversion units is maintained.

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