Power supply circuit and power supply system
By employing a PG control scheme with multiple DC-DC conversion modules and adjustment modules in intelligent driving vehicles, the problem of high cost of digital power management chips is solved, achieving low-cost timing coordination and system stability.
Patent Information
- Application Number
- CN202511105904.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-07
- Publication Date
- 2025-11-04
AI Technical Summary
In existing intelligent driving vehicle module integration solutions, the high cost of digital power management chips leads to a higher overall cost and makes it impossible to effectively coordinate the timing differences among multiple functional modules.
Multiple DC-DC conversion modules are used, and the timing of at least one DC-DC conversion module is made earlier than that of another through PG control. This coordinates the timing and reduces the use of digital power management chips. At the same time, the adjustment module and RC network module are combined to perform precise timing adjustment.
It reduces the economic burden, decreases the use of digital power management chips, improves the accuracy of timing coordination and system reliability, and saves resources.
Smart Images
Figure CN120896100A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of circuit control, and more particularly to a power supply circuit and power supply system. Background Technology
[0002] With the continuous development of technology, intelligent driving vehicles are becoming increasingly feature-rich. To achieve the "cabin-driver integration" architecture of intelligent driving vehicles, multiple modules corresponding to various functions need to be integrated to support intelligent driving and the intelligent cockpit. These functional modules need to coordinate with each other, and the timing differences between them are significant. Existing solutions employ dedicated timing chips, namely digital power management chips, for timing coordination. These chips adjust timing and supply voltage to ensure that timing conflicts do not occur between the multiple functional modules.
[0003] However, in existing solutions, digital power management chips can only be configured one-to-one, meaning that one digital power management chip can only connect to one functional module. Multiple functional modules require multiple digital power management chips, and the cost of digital power management chips is relatively high, which leads to a higher total cost and a greater economic burden. Summary of the Invention
[0004] This application provides a power supply circuit and power supply system to reduce the cost of control timing.
[0005] The first aspect of this application provides a power supply circuit, including: a plurality of DC-DC conversion modules;
[0006] The DC-DC converter module is provided with a power input terminal, an enable terminal, a power output terminal, and a power good PG control terminal. For each DC-DC converter module, the power input terminal is connected to an external power source or the power output terminal of another DC-DC converter module, the enable terminal is connected to an external controller or the PG control terminal of another DC-DC converter module, the power output terminal is connected to an external load or the power input terminal of another DC-DC converter module, and the PG control terminal is connected to an external load or the enable terminal of another DC-DC converter module.
[0007] At least one of the DC-DC converter modules has its PG control terminal connected to the enable terminal of another DC-DC converter module, and at least one of the DC-DC converter modules has its power input terminal connected to an external power source and its enable terminal connected to an external controller.
[0008] Optionally, the circuit further includes: at least one adjustment module;
[0009] For each of the adjustment modules, the adjustment module is provided with a power supply signal input terminal, a control signal input terminal and a signal output terminal. The power supply signal input terminal is connected to the power supply output terminal of one of the multiple DC-DC conversion modules. The signal output terminal is connected to an external load. The control signal input terminal is connected to the enable terminal or PG control terminal of the DC-DC conversion module.
[0010] Optionally, the adjustment module includes: a PMOS transistor, an NPN transistor, a second resistor, and a fourth resistor;
[0011] The source of the PMOS transistor serves as the power supply signal input terminal of the adjustment module. The source of the PMOS transistor is connected to the first terminal of the second resistor. The gate of the PMOS transistor is connected to the second terminal of the second resistor and the collector of the NPN transistor. The drain of the PMOS transistor serves as the signal output terminal of the adjustment module.
[0012] The base of the NPN transistor serves as the control signal input terminal of the adjustment module. The base of the NPN transistor is connected to the first terminal of the fourth resistor, and the second terminal of the fourth resistor and the emitter of the PMOS transistor are both grounded.
[0013] Optionally, the adjustment module includes: an NMOS transistor, a PNP transistor, a sixth resistor, a seventh resistor, and a DC source;
[0014] The drain of the NMOS transistor serves as the power supply signal input terminal of the adjustment module, and the source of the NMOS transistor serves as the signal output terminal of the adjustment module. The gate of the NMOS transistor is connected to the collector of the PNP transistor and the first terminal of the seventh resistor, respectively. The emitter of the PNP transistor is connected to the positive terminal of the DC source and the first terminal of the sixth resistor, respectively. The base of the PNP transistor is connected to the second terminal of the sixth resistor, and the base of the PNP transistor serves as the control signal input terminal of the adjustment module. The negative terminal of the DC source and the second terminal of the seventh resistor are both grounded.
[0015] Optionally, the circuit further includes a power management chip;
[0016] The input terminal of the power management chip is connected to an external power source, and the output terminal of the power management chip is connected to an external load.
[0017] Optionally, the circuit further includes: at least one RC network module;
[0018] At least one of the DC-DC converter modules has its PG control terminal connected to an external load or the enable terminal of another DC-DC converter module via the RC network module.
[0019] The RC network module includes a fine-tuning resistor and a fine-tuning capacitor. One end of the fine-tuning resistor serves as the input terminal of the RC network module, and the other end of the fine-tuning resistor serves as the output terminal of the RC network module. One end of the fine-tuning capacitor is connected to one end of the fine-tuning resistor, and the other end of the fine-tuning capacitor is grounded.
[0020] Optionally, the DC-DC conversion module is a Buck circuit module or a Boost circuit module.
[0021] Optionally, the circuit further includes: a system-in-package (SiP) chip, wherein the SiP chip includes a power management integrated circuit (PMIC) module;
[0022] At least one of the DC-DC converter modules has its power output terminal connected to the input terminal of the system-in-package chip, and then connected to an external load or the power input terminal of another DC-DC converter module via the PMIC module.
[0023] A second aspect of this application provides a power supply system, including the aforementioned power supply circuit, the system further including: a power source and multiple loads;
[0024] The input terminal of the power supply circuit is connected to the power source, and the multiple output terminals of the power supply circuit are respectively connected to the multiple loads.
[0025] Optionally, the power supply circuit includes multiple DC-DC conversion modules, and at least two loads that meet specified conditions are connected to the same DC-DC conversion module. The specified conditions are that the rated voltage ranges of at least two loads overlap, and the difference between the minimum and maximum values of the rated voltage ranges of at least two loads is less than a preset value.
[0026] As can be seen from the above technical solutions, the embodiments of this application have the following advantages:
[0027] The power supply circuit of this application includes multiple DC-DC conversion modules. The PG control terminal of at least one DC-DC conversion module is connected to the enable terminal of another DC-DC conversion module. This means that, based on PG control, the timing of at least one DC-DC conversion module is earlier than that of the others. Only after the DC-DC conversion module with the earlier timing is operating normally can the DC-DC conversion modules with the later timing begin to operate, thus reducing the need for digital power management chips. Furthermore, the cost of DC-DC conversion modules is significantly lower than that of digital power management chips. This allows for substantial cost reduction while maintaining proper timing, thus alleviating the economic burden. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.
[0029] Figure 1 This is a schematic diagram of an embodiment of a power supply circuit disclosed in this application;
[0030] Figure 2 This is a schematic diagram of another embodiment of a power supply circuit disclosed in this application;
[0031] Figure 3 This is a schematic diagram of an embodiment of the adjustment module disclosed in this application;
[0032] Figure 4 This is a schematic diagram of another embodiment of the adjustment module disclosed in this application;
[0033] Figure 5 This is a schematic diagram of another embodiment of the adjustment module disclosed in this application;
[0034] Figure 6 This is a schematic diagram of the RC network disclosed in this application;
[0035] Figure 7 This is a schematic diagram of the ADC power-on timing disclosed in this application;
[0036] Figure 8 This is a schematic diagram illustrating a specific application of a power supply circuit disclosed in this application;
[0037] Figure 9 This is a schematic diagram of one embodiment of a power supply system disclosed in this application. Detailed Implementation
[0038] The present application will be further described in detail below with reference to the accompanying drawings.
[0039] This application provides a power supply circuit and power supply system to reduce the cost of control timing.
[0040] To meet the complex power supply requirements of multi-functional modules working collaboratively and to achieve the architectural evolution of multi-module collaboration, such as the "cockpit-driver integration" in intelligent driving vehicles, existing solutions utilize digital power management chips for timing coordination to avoid timing conflicts. However, existing solutions require a large number of digital power management chips, and these chips themselves are expensive, resulting in a high total cost and a significant economic burden. To address these issues, this application provides a power supply circuit and system. The power supply circuit incorporates multiple DC-DC conversion modules. Based on PG control, at least one DC-DC conversion module's timing is earlier than that of another. Only after the earlier-tied module has completed its normal operation can the later-tied modules begin to work, reducing or even eliminating the need for digital power management chips. Furthermore, the cost of DC-DC conversion modules is significantly lower than that of digital power management chips, thus greatly reducing costs and economic burden while coordinating timing.
[0041] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.
[0042] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.
[0043] The following describes a power supply circuit according to this application. Please refer to... Figure 1 One embodiment of a power supply circuit according to this application includes: a plurality of DC-DC conversion modules;
[0044] The DC-DC converter module is provided with a power input terminal, an enable terminal, a power output terminal, and a power good PG control terminal. For each DC-DC converter module, the power input terminal is connected to an external power source or the power output terminal of another DC-DC converter module, the enable terminal is connected to an external controller or the PG control terminal of another DC-DC converter module, the power output terminal is connected to an external load or the power input terminal of another DC-DC converter module, and the PG control terminal is connected to an external load or the enable terminal of another DC-DC converter module.
[0045] At least one of the DC-DC converter modules has its PG control terminal connected to the enable terminal of another DC-DC converter module, and at least one of the DC-DC converter modules has its power input terminal connected to an external power source and its enable terminal connected to an external controller. Specifically, the PG control terminal of DC-DC converter module n-1 is connected to the enable terminal of DC-DC converter module n, and the power input terminal of DC-DC converter module 1 is connected to an external power source and its enable terminal connected to an external controller.
[0046] The working principle of this embodiment will now be explained. For load modules with different timing requirements, the PG control terminal of the DC-DC converter module with the earlier timing is connected to the enable terminal of the DC-DC converter module with the later timing. The load connected to the DC-DC converter module with the earlier timing has a higher timing priority than the load connected to the DC-DC converter module with the later timing. In this way, the next DC-DC converter module can only start working after the previous DC-DC converter module has started working, thereby satisfying the timing requirements of the load modules.
[0047] In this embodiment, the power supply circuit includes multiple DC-DC converter modules. The PG control terminal of at least one DC-DC converter module is connected to the enable terminal of another DC-DC converter module. This means that, based on PG control, the timing of at least one DC-DC converter module is earlier than that of another. Only after the DC-DC converter with the earlier timing is operating normally can the DC-DC converter with the later timing begin to operate, thus reducing the need for digital power management chips. Furthermore, the cost of DC-DC converter modules is significantly lower than that of digital power management chips. This allows for substantial cost reduction while maintaining proper timing, thereby alleviating the economic burden.
[0048] Please see Figures 2 to 8 Another embodiment of the power supply circuit of this application includes: multiple DC-DC conversion modules. For ease of understanding, this embodiment is illustrated by using five DC-DC conversion modules.
[0049] The DC-DC converter module is equipped with a power input terminal, an enable terminal, a power output terminal, and a power good PG control terminal. For each DC-DC converter module, the power input terminal is connected to an external power supply or the power output terminal of another DC-DC converter module; the enable terminal is connected to an external controller or the PG control terminal of another DC-DC converter module; the power output terminal is connected to an external load or the power input terminal of another DC-DC converter module; and the PG control terminal is connected to an external load or the enable terminal of another DC-DC converter module. The DC-DC converter module can be a Buck circuit module or a Boost circuit module, which can be selected according to actual needs; no specific limitation is made here.
[0050] At least one of the DC-DC converter modules has its PG control terminal connected to the enable terminal of another DC-DC converter module, and at least one of the DC-DC converter modules has its power input terminal connected to an external power source and its enable terminal connected to an external controller. Specifically, in one embodiment of this example, the power input terminals of both DC-DC converter module 1 and DC-DC converter module 2 are connected to an external power source, and the enable terminals of both DC-DC converter module 1 and DC-DC converter module 2 are connected to an external controller. The PG control terminal of DC-DC converter module 2 is connected to the enable terminal of DC-DC converter module 3, and the power input terminal of DC-DC converter module 3 is connected to the power output terminal of DC-DC converter module 2. The power output terminal of DC-DC converter module 3 is connected to the power input terminals of DC-DC converter modules 4 and 5, and the PG control terminal of DC-DC converter module 3 is connected to the enable terminals of DC-DC converter modules 4 and 5.
[0051] To reduce the occupancy of external controller I / O ports and improve the accuracy of timing adjustments, an adjustment module can be used for more precise timing coordination. The PG control, combined with the adjustment module, offers strong fault tolerance and flexible configuration of power-on timing requirements. Specifically, the circuit also includes at least one adjustment module; for ease of understanding, this embodiment uses one adjustment module as an example.
[0052] Each adjustment module is provided with a power supply signal input terminal, a control signal input terminal, and a signal output terminal. The power supply signal input terminal is connected to the power supply output terminal of one of the plurality of DC-DC conversion modules, the signal output terminal is connected to an external load, and the control signal input terminal is connected to the enable terminal or PG control terminal of the DC-DC conversion module. Specifically, in one embodiment, the signal output terminal of the adjustment module is connected to an external load, the control signal input terminal of the adjustment module is connected to the PG control terminal of the DC-DC conversion module 5, and the power supply signal input terminal of the adjustment module is connected to the power supply output terminal of the DC-DC conversion module 5.
[0053] The adjustment module is used to adjust the power supply timing of connected external loads. It ensures the power supply timing of the external load meets the requirements when there is a conflict between the power supply timing requirements of the external power supply or the connected DC-DC converter module. A power supply timing conflict occurs when the required power supply level sequence of the load differs from the input signal level sequence. For example, the load requires power supply at the first level followed by the second level, while the load's input signal requires the second level followed by the first level. Reasons for power supply timing conflicts include: the external power supply or DC-DC converter module is simultaneously connected to other high-priority modules, and the power supply timing requirements of these high-priority modules conflict with the power supply timing of the external load. For example, if the power supply timing of DC-DC converter modules 4 and 5 conflicts with the power supply timing requirements of external load 3 (e.g., ...). Figure 2The DC-DC conversion modules 4 and 5 shown are connected to external loads 3 and 5, which have conflicting power supply timing requirements (where the timing priority of external load 5 is higher than that of external load 3). An adjustment module can be added between DC-DC conversion module 4 / 5 and external load 3.
[0054] The adjustment module has at least three implementation methods. Please refer to [link / reference]. Figure 3 In one embodiment, the adjustment module includes: a PMOS transistor Q1, an NPN transistor Q2, a second resistor R2, and a fourth resistor R4;
[0055] The source of the PMOS transistor Q1 serves as the power supply signal input terminal of the adjustment module. The source of the PMOS transistor Q1 is connected to the first terminal of the second resistor R2. The gate of the PMOS transistor Q1 is connected to the second terminal of the second resistor R2 and the collector of the NPN transistor Q2. The drain of the PMOS transistor Q1 serves as the signal output terminal of the adjustment module.
[0056] The base of the NPN transistor Q2 serves as the control signal input terminal of the adjustment module. The base of the NPN transistor Q2 is connected to the first terminal of the fourth resistor R4, and the second terminal of the fourth resistor R4 and the emitter of the PMOS transistor Q1 are both grounded.
[0057] The working principle of this embodiment is as follows: When the control signal input terminal is high and there is a voltage input at the power supply signal input terminal, the NPN transistor Q2 is turned on, making the gate of the PMOS transistor Q1 low. Since there is a voltage input at the source of the PMOS transistor Q1, it is turned on, and current is output at the signal output terminal, supplying power to the external load. When the control signal input terminal is low and there is a voltage input at the power supply signal input terminal, the NPN transistor Q2 remains off, making the gate of the PMOS transistor Q1 high. The PMOS transistor Q1 is turned off, stopping the supply of power to the external load.
[0058] Based on the above implementation method, to ensure the durability of the transistor and the stability of the circuit, and to flexibly configure the power-on timing requirements, some resistors and capacitors were added. Further details can be found in the following documentation. Figure 4 In the second embodiment, the adjustment module includes: a PMOS transistor Q1, an NPN transistor Q2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a second capacitor C2, and a third capacitor C3.
[0059] The first end of the first resistor R1 serves as the power supply signal input terminal of the adjustment module. The second end of the first resistor R1 is connected to the source of the PMOS transistor Q1 and the first end of the second resistor R2, respectively. The gate of the PMOS transistor Q1 is connected to the first end of the third resistor R3. The drain of the PMOS transistor Q1 is connected to the first end of the third capacitor C3 and the first end of the first capacitor C1, respectively. The drain of the PMOS transistor Q1 serves as the signal output terminal of the adjustment module. The second end of the first capacitor C1 is grounded.
[0060] The collector of the NPN transistor Q2 is connected to the second terminal of the second resistor R2, the second terminal of the third resistor R3, and the second terminal of the third capacitor C3, respectively. The first terminal of the fifth resistor R5 serves as the control signal input terminal of the adjustment module. The base of the NPN transistor Q2 is connected to the second terminal of the fifth resistor R5, the first terminal of the fourth resistor R4, and the first terminal of the second capacitor C2, respectively. The second terminal of the fourth resistor R4, the second terminal of the second capacitor C2, and the emitter of the PMOS transistor Q1 are all grounded.
[0061] The working principle of this embodiment is as follows: When the control signal input terminal is at a high level and there is a voltage input at the power supply signal input terminal, the NPN transistor Q2 is turned on, making the gate of the PMOS transistor Q1 low level. Since there is a voltage input at the source of the PMOS transistor Q1, the PMOS transistor Q1 is turned on, and there is a current output at the signal output terminal. When the control signal input terminal is at a low level and there is a voltage input at the power supply signal input terminal, the NPN transistor Q2 remains off, making the gate of the PMOS transistor Q1 high level, and the PMOS transistor Q1 is turned off.
[0062] In this embodiment, a PMOS transistor is selected as the main power supply switch to handle high-current loads. An NPN transistor is used as the driver stage to convert the small-current control signal at the control signal input terminal into the drive signal required by the PMOS transistor gate, eliminating the need for software control and avoiding the risk of software failure. In addition, NPN transistors have fast driving speeds, PMOS transistors have fast turn-on speeds, and strong fault tolerance, allowing for flexible configuration of power-on timing requirements.
[0063] Please see Figure 5 In the third embodiment, the adjustment module includes: NMOS transistor Q3, PNP transistor Q4, sixth resistor R6, seventh resistor R7 and DC source DC. In addition, DC source DC can be replaced by the power supply at the power supply signal input terminal or other alternatives. The specifics are not limited here. This embodiment uses DC source DC as an example for illustration.
[0064] The drain of the NMOS transistor Q3 serves as the power supply signal input terminal of the adjustment module, and the source of the NMOS transistor Q3 serves as the signal output terminal of the adjustment module. The gate of the NMOS transistor Q3 is connected to the collector of the PNP transistor Q4 and the first terminal of the seventh resistor R7. The emitter of the PNP transistor Q4 is connected to the positive terminal of the DC source DC and the first terminal of the sixth resistor R6. The base of the PNP transistor Q4 is connected to the second terminal of the sixth resistor R6. The base of the PNP transistor Q4 serves as the control signal input terminal of the adjustment module. The negative terminal of the DC source DC and the second terminal of the seventh resistor R7 are both grounded.
[0065] The working principle of this embodiment is as follows: When the control signal input terminal is high and there is a voltage input at the power supply signal input terminal, the PNP transistor Q4 is turned off, making the gate of the NMOS transistor Q3 low. Since there is a voltage input at the source of the NMOS transistor Q3, it turns on, and current is output at the signal output terminal. When the control signal input terminal is low and there is a voltage input at the power supply signal input terminal, the PNP transistor Q4 remains on. The DC current flows through the PNP transistor Q4 and the seventh resistor R7 to ground, making the gate of the NMOS transistor Q3 high, and the NMOS transistor Q3 turns off.
[0066] Of the three implementation methods described above, the second implementation method will be used as an example for illustration.
[0067] To improve circuit feasibility, the circuit may also include a power management chip. The input of the power management chip is connected to an external power supply, and the output is connected to an external load. Specifically, one power management chip may be connected to one or more external loads.
[0068] To achieve fine-tuning of the timing, an RC network can be added to the circuit. Specifically, the circuit also includes at least one RC network module; for ease of understanding, this embodiment uses one RC network module as an example.
[0069] At least one of the DC-DC converter modules has its PG control terminal connected to an external load or the enable terminal of another DC-DC converter module via the RC network module. Exemplarily, in one embodiment, such as... Figure 2 As shown, the input terminal of the RC network module is connected to the PG control terminal of the DC-DC converter module 2, and the output terminal of the RC network module is connected to the enable terminal of the DC-DC converter module 3. In another embodiment, the RC network module can be placed between the adjustment module and the DC-DC converter module, for example, in... Figure 2 In the process, the PG control terminal of the DC-DC conversion module 5 can be connected to the control signal input terminal of the adjustment module through the RC network module.
[0070] Please refer to Figure 6The RC network module includes a fine-tuning resistor and a fine-tuning capacitor. One end of the fine-tuning resistor serves as the input terminal of the RC network module, and the other end of the fine-tuning resistor serves as the output terminal of the RC network module. One end of the fine-tuning capacitor is connected to one end of the fine-tuning resistor, and the other end of the fine-tuning capacitor is grounded.
[0071] To flexibly configure the output voltage and meet the power supply requirements of special voltage-powered loads such as peripheral communication loads or Bluetooth loads, a system-in-package (SIP) chip can also be included. Specifically, the circuit also includes a SIP chip, which comprises a power management integrated circuit (PMIC) module.
[0072] At least one of the DC-DC converter modules has its power output terminal connected to the input terminal of the system-in-package (SoC) chip, and then connected to an external load or the power input terminal of another DC-DC converter module via the PMIC module. Specifically, the input terminal of the PMIC module is connected to the power output terminal of DC-DC converter module 2, and the output terminal of the PMIC module is connected to the power supply signal input terminal for voltage configuration.
[0073] The working principle of this embodiment will now be explained with an example. In one implementation, the power input terminals of DC-DC converter 1 and DC-DC converter 2 are both connected to an external power source, and the enable terminals of both DC-DC converter 1 and DC-DC converter 2 are both connected to an external controller. When the external controller simultaneously inputs I / O control signals and the external power source is turned on, since the timing of external load 1 is earlier than that of external load 2, and there is no PG control between DC-DC converter 1 and DC-DC converter 2, the power output terminal of DC-DC converter 1 is directly connected to external load 1, while the power output terminal of DC-DC converter 2 needs to be connected to external load 2 via a PMIC module, making external load 2 slower than external load 1. The power input terminal of DC-DC converter 3 is connected to the power output terminal of DC-DC converter 2, and the enable terminal of DC-DC converter 3 is connected to the PG control terminal of DC-DC converter 2 via an RC network module. Since DC-DC converter 3 needs to operate after DC-DC converter 2, and with the fine-tuning of the RC network module, external load 3 is slower than external load 2. The power input terminals of DC-DC converter modules 4 and 5 are both connected to the power output terminal of DC-DC converter module 3. The enable terminals of DC-DC converter modules 4 and 5 are both connected to the PG control terminal of DC-DC converter module 3. Since the external load 3 requires that the electrical signal provided by the power output terminal of DC-DC converter module 4 must precede the electrical signal provided by the power output terminal of DC-DC converter module 5, in order to prevent the power supply timing of DC-DC converter module 5 from taking precedence over DC-DC converter module 4, an adjustment module is added between DC-DC converter module 5 and external load 3. The adjustment module outputs to external load 3 only after DC-DC converter module 5 provides a power supply signal and DC-DC converter module 4 or MCU IO provides a control signal.
[0074] For example, please see Figure 7 and Figure 8 Where VIOVDD is the input voltage of the IO port, VVIN is the total input voltage, and tVIN is the power-on time difference between the two. MINVRST is the minimum reset voltage, MAXVRSTN is the maximum reset voltage, and tPORST is the time difference between the two. Based on the user's timing requirements for each load, the following table 1 (partial) is compiled:
[0075]
[0076] Table 1
[0077] The ADC module power supply timing requirement is that 1.8V must be applied before the ADC module input VIN (3.3V) to ensure correct sampling of the ADDR pin upon power-up; that is, 1.8V before 3.3V. Figure 8In this system, due to the presence of a SIP (including a PMIC module) and DC-DC4 and DC-DC5, the power-on sequence is MCU before WLAN / BT Module before MIC ADC. Therefore, the system powers on at 3.3V. However, since the ADC module requires DC-DC4 to supply 1.8V before DC-DC5's 3.3V, an adjustment module is placed between DC-DC5 and the MIC ADC. Figure 8 (Not shown) so that the power supply timing of the ADC module is 3.3V later than 1.8V.
[0078] In this embodiment, the power supply circuit includes multiple DC-DC converter modules. The PG control terminal of at least one DC-DC converter module is connected to the enable terminal of another DC-DC converter module. This means that, based on PG control, the timing of at least one DC-DC converter module is earlier than that of another. Only after the DC-DC converter with the earlier timing is operating normally can the DC-DC converter with the later timing begin to operate, eliminating the need for a digital power management chip. Furthermore, the cost of DC-DC converter modules is significantly lower than that of digital power management chips. This allows for substantial cost reduction while maintaining synchronized timing, thus alleviating the economic burden. Additionally, PG control saves on the I / O control pins of external controllers, conserving resources. Moreover, based on PG control, the timing can be further adjusted using adjustment modules and RC network modules, significantly improving timing accuracy.
[0079] The above describes a power supply circuit according to an embodiment of this application. The following describes a power supply system according to an embodiment of this application. One embodiment of the power supply system includes the aforementioned power supply circuit, and the system further includes a power source and multiple loads.
[0080] The input terminal of the power supply circuit is connected to the power source, and the multiple output terminals of the power supply circuit are respectively connected to the multiple loads. The input terminal of the power supply circuit is the power input terminal of the DC-DC conversion module that needs to be connected to the power source.
[0081] In this embodiment, the power supply provides electrical energy to the power supply circuit, which performs power conversion and timing adjustment. While providing different voltage supplies to each load, it also adjusts the timing between the loads, ensuring the reliability and stability of the system.
[0082] Please see Figure 9 Another embodiment of the power supply system of this application includes: the aforementioned power supply circuit, and the system further includes: a power source and multiple loads;
[0083] The input terminal of the power supply circuit is connected to the power source, and the multiple output terminals of the power supply circuit are respectively connected to the multiple loads.
[0084] The power supply circuit includes multiple DC-DC conversion modules. At least two loads meeting specified conditions are connected to the same DC-DC conversion module. The specified conditions are that the rated voltage ranges of the at least two loads overlap, and the difference between the minimum and maximum values of the rated voltage ranges of the at least two loads is less than a preset value. The preset value is generally 0.2V and can be adjusted according to actual needs; no specific limitation is made here. Loads can be cockpit MCUs, intelligent driving chips, vehicle cameras, or sensors, etc., and no specific limitation is made here. Furthermore, the power supply system can specifically be electronic equipment (such as vehicle domain controllers), or a mobile platform including electronic equipment such as a vehicle or ship, or other types, and no specific limitation is made here.
[0085] The working principle of this embodiment is now described. In one implementation, the timing sequence is as follows: load 1 and load 5 before load 2, load 2 before load 3, and load 3 before load 4. The rated voltage ranges of loads 1, 2, 3, 4, 5, and 6 are 0.9 to 1V, 1.75 to 1.85V, 1.8 or 3.3V, 3.2 to 3.3V, 0.95 to 1.05V, and 1.8V, respectively. Loads 1 and 5 meet the specified conditions, as do loads 3 and 6, and their voltage domains can be combined, allowing them to be connected to the same DC-DC converter module. Loads 1 and 5 are connected to DC-DC converter module 1, load 2 to DC-DC converter module 2, load 3 to DC-DC converter modules 4 and 5, and load 4 to the power management chip. DC-DC converter module 1 operates first, followed by DC-DC converter module 2, then DC-DC converter module 3, then DC-DC converter modules 4 and 5, and finally the power management chip with its pre-set timing sequence.
[0086] In this embodiment of the application, by integrating loads that meet the specified conditions into the same DC-DC converter module, the number of DC-DC converter modules required is greatly reduced, the area occupied is reduced, the cost is reduced, the heat dissipation pressure is reduced, and the timing conflicts between loads can be resolved, bringing a better user experience.
[0087] Based on the cooperation of PG control, adjustment modules and RC network modules, the timing required by the load can be properly allocated to avoid timing conflicts. At the same time, by configuring power management chips or PMIC modules in more critical loads, the output voltage can be flexibly configured to meet the power supply requirements of special voltage power supply modules (such as WLAN / BT modules, which have large differences in power supply amplitude within the same module and a small number of power supply branches), further reducing the possibility of timing conflicts and greatly improving reliability.
[0088] The power supply circuit and power supply system provided in this application embodiment can be applied to vehicle domain controllers, vehicle cabin integrated controllers, or other multi-chip power supply devices. The power supply system can be an electronic device (such as a vehicle domain controller) or a mobile platform including electronic devices (such as a vehicle or a ship), or other devices that can implement the content of this embodiment. No specific limitations are made here.
[0089] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing embodiments, and will not be repeated here.
[0090] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.
[0091] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0092] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.
[0093] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this invention.
Claims
1. A power supply circuit, characterized in that, include: Multiple DC-DC conversion modules; The DC-DC converter module is provided with a power input terminal, an enable terminal, a power output terminal, and a power good PG control terminal. For each DC-DC converter module, the power input terminal is connected to an external power source or the power output terminal of another DC-DC converter module, the enable terminal is connected to an external controller or the PG control terminal of another DC-DC converter module, the power output terminal is connected to an external load or the power input terminal of another DC-DC converter module, and the PG control terminal is connected to an external load or the enable terminal of another DC-DC converter module. At least one of the DC-DC converter modules has its PG control terminal connected to the enable terminal of another DC-DC converter module, and at least one of the DC-DC converter modules has its power input terminal connected to an external power source and its enable terminal connected to an external controller.
2. The power supply circuit according to claim 1, characterized in that, The circuit further includes: at least one adjustment module; For each of the adjustment modules, the adjustment module is provided with a power supply signal input terminal, a control signal input terminal and a signal output terminal. The power supply signal input terminal is connected to the power supply output terminal of one of the multiple DC-DC conversion modules. The signal output terminal is connected to an external load. The control signal input terminal is connected to the enable terminal or PG control terminal of the DC-DC conversion module.
3. The power supply circuit according to claim 2, characterized in that, The adjustment module includes: a PMOS transistor, an NPN transistor, a second resistor, and a fourth resistor; The source of the PMOS transistor serves as the power supply signal input terminal of the adjustment module. The source of the PMOS transistor is connected to the first terminal of the second resistor. The gate of the PMOS transistor is connected to the second terminal of the second resistor and the collector of the NPN transistor. The drain of the PMOS transistor serves as the signal output terminal of the adjustment module. The base of the NPN transistor serves as the control signal input terminal of the adjustment module. The base of the NPN transistor is connected to the first terminal of the fourth resistor, and the second terminal of the fourth resistor and the emitter of the PMOS transistor are both grounded.
4. The power supply circuit according to claim 2, characterized in that, The adjustment module includes: an NMOS transistor, a PNP transistor, a sixth resistor, a seventh resistor, and a DC source; The drain of the NMOS transistor serves as the power supply signal input terminal of the adjustment module, and the source of the NMOS transistor serves as the signal output terminal of the adjustment module. The gate of the NMOS transistor is connected to the collector of the PNP transistor and the first terminal of the seventh resistor, respectively. The emitter of the PNP transistor is connected to the positive terminal of the DC source and the first terminal of the sixth resistor, respectively. The base of the PNP transistor is connected to the second terminal of the sixth resistor, and the base of the PNP transistor serves as the control signal input terminal of the adjustment module. The negative terminal of the DC source and the second terminal of the seventh resistor are both grounded.
5. The power supply circuit according to claim 1, characterized in that, The circuit also includes: a power management chip; The input terminal of the power management chip is connected to an external power source, and the output terminal of the power management chip is connected to an external load.
6. The power supply circuit according to claim 1, characterized in that, The circuit also includes: at least one RC network module; At least one of the DC-DC converter modules has its PG control terminal connected to an external load or the enable terminal of another DC-DC converter module via the RC network module. The RC network module includes a fine-tuning resistor and a fine-tuning capacitor. One end of the fine-tuning resistor serves as the input terminal of the RC network module, and the other end of the fine-tuning resistor serves as the output terminal of the RC network module. One end of the fine-tuning capacitor is connected to one end of the fine-tuning resistor, and the other end of the fine-tuning capacitor is grounded.
7. The power supply circuit according to claim 1, characterized in that, The DC-DC conversion module is either a Buck circuit module or a Boost circuit module.
8. The power supply circuit according to claim 1, characterized in that, The circuit also includes: a system-in-package chip, the system-in-package chip including a power management integrated circuit (PMIC) module; At least one of the DC-DC converter modules has its power output terminal connected to the input terminal of the system-in-package chip, and then connected to an external load or the power input terminal of another DC-DC converter module via the PMIC module.
9. A power supply system, characterized in that, The system includes the power supply circuit as described in any one of claims 1 to 8, and further includes: a power source and multiple loads; The input terminal of the power supply circuit is connected to the power source, and the multiple output terminals of the power supply circuit are respectively connected to the multiple loads.
10. The power supply system according to claim 9, characterized in that, The power supply circuit includes multiple DC-DC conversion modules. At least two loads that meet specified conditions are connected to the same DC-DC conversion module. The specified conditions are that the rated voltage ranges of at least two loads overlap, and the difference between the minimum and maximum values of the rated voltage ranges of at least two loads is less than a preset value.