Semiconductor integrated circuit for power supply and power supply device

Abstract

The invention relates to the technical field of power supplies, and discloses a semiconductor integrated circuit for a power supply and a power supply device.The conversion speed of a signal edge is increased through a plurality of monostable circuits of a voltage conversion circuit module, and corresponding transistors are turned on at a rising edge and a falling edge according to corresponding control logics; the efficiency and the accuracy of signal transmission are effectively improved; the power supply outputs stable working voltage, adverse effects caused by voltage fluctuation on electric equipment are reduced, the working reliability and stability of the circuit are improved, all the modules work cooperatively, stable and accurate clock signals are provided, it is ensured that operation such as signal transmission and transistor control in the voltage conversion circuit module can be carried out according to an accurate time sequence, and the reliability and stability of the circuit are improved. In addition, all components such as an oscillator and a comparator in the voltage stabilizing circuit module can be orderly coordinated based on a precise clock, efficient and stable operation of the whole semiconductor integrated circuit for the power supply is guaranteed, the overall performance of the power supply is improved, and the adaptability to various electronic devices is enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of power supply, and in particular to a semiconductor integrated circuit for power supply and a power supply device including the integrated circuit. Background Art

[0002] With the continuous development of electronic equipment, the performance requirements for power supplies are getting higher and higher. Traditional power supply circuits often have problems such as low voltage conversion efficiency, poor output voltage stability, and inaccurate clock signals, which make it difficult to meet the power supply needs of various complex and high-precision electronic devices. Especially for some high-frequency power supplies, the requirements for stable power supply are very high. In order to solve these problems, it is necessary to design a semiconductor integrated circuit for power supply with high integration and better performance and a corresponding power supply device. Summary of the invention

[0003] Based on this, it is necessary to provide a semiconductor integrated circuit for power supply and a power supply device including the integrated circuit to effectively meet the power requirements of various electronic devices in order to address at least one of the above technical defects.

[0004] A semiconductor integrated circuit for power supply, comprising: a voltage conversion circuit module, a voltage stabilizing circuit module, and a clock generator module, wherein the clock generator module is connected to the voltage conversion circuit module, the voltage conversion circuit module is connected to the voltage stabilizing circuit module, and the voltage conversion circuit module is also connected to a power supply;

[0005] Wherein, the voltage conversion circuit module includes:

[0006] Two voltage input ports, a first voltage input port V1 and a second voltage input port V2, respectively provide working voltage input for the voltage conversion circuit module;

[0007] A plurality of monostable circuits, wherein the plurality of monostable circuits are used to accelerate the switching speed of the signal edge;

[0008] a first port and a second port, wherein the first port is connected to the power supply, and the second port is connected to the voltage stabilizing circuit module;

[0009] When data is transmitted from the first port to the second port, during the rising edge, the third monostable circuit turns on the transistor MOS3, and during the falling edge, the fourth monostable circuit turns on the transistor MOS4, and

[0010] Wherein, when data is transmitted from the second port to the first port, during a rising edge, the first monostable circuit turns on the transistor MOS2, and during a falling edge, the second monostable circuit turns on the transistor MOS1; and

[0011] Two pull-up resistors R3 and R4, when the output of the voltage conversion circuit module drives a low level, the values ​​of the two pull-up resistors R3 and R4 are one resistance value, and when the output of the voltage conversion circuit module drives a high level, the values ​​of the two pull-up resistors R3 and R4 are another resistance value, wherein the one resistance value is greater than the other resistance value.

[0012] For example, when the output of the voltage conversion circuit module drives a low level, the values ​​of the two pull-up resistors R3 and R4 are set to 400 ohms, and when the output of the voltage conversion circuit module drives a high level, the values ​​of the two pull-up resistors R3 and R4 are set to 40 ohms.

[0013] When the output is driven low, it means that the output of the circuit is in a low state. At this time, the pull-up resistor pulls up the output voltage, and its resistance is relatively large to provide appropriate DC bias and driving capability to ensure that the circuit can work normally in this state and affect the output electrical characteristics to a certain extent, such as reducing static power consumption.

[0014] In one embodiment, the pull-up resistor is a variable resistor, and the resistance value of the pull-up resistor is automatically switched according to the output level of the voltage conversion circuit module. The switching process is controlled by the control logic inside the voltage conversion circuit module, and the control logic generates a corresponding control signal according to the level state of the output signal to ensure that the pull-up resistor provides a corresponding resistance value under different working states. The resistance value will change dynamically according to the output level, with a large resistance value when the output is low and a small resistance value when the output is high.

[0015] In one embodiment, during data transmission, the monostable circuit is used to control the on and off of the transistor to accelerate the rising and falling edge conversion of the signal, wherein the trigger signals of the multiple monostable circuits are derived from the changes in the first voltage of the first voltage input port V1 and the second voltage of the second voltage input port V2, and the pulse widths output by the multiple monostable circuits can be adjusted to adapt to different data transmission rate requirements.

[0016] In one embodiment, the voltage stabilization circuit module includes: an internal regulation module, which provides a stable operating voltage for the internal circuit of the chip; a fixed gain error amplifier, which compares the feedback signal of the output voltage with the bandgap reference voltage to generate an error signal; an oscillator, which generates a pulse signal of a fixed frequency to control the on and off of the switch tube; a comparator, which compares the output of the fixed gain error amplifier with the pulse signal generated by the oscillator to generate a control signal; a latch, which is used to maintain the output state of the comparator to ensure the stability of the on and off time of the switch tube; a thermal shutdown circuit, which is used to monitor the temperature and output a shutdown signal when the temperature exceeds the set threshold; a driver, which is used to drive the switch tube to achieve voltage adjustment.

[0017] In one embodiment, the output end of the voltage stabilizing circuit module is connected to the first end of the inductor, the first end of the inductor is also connected to the cathode of the diode, and the anode of the diode is grounded; the second end of the inductor is connected to the capacitor.

[0018] In one embodiment, the output end of the voltage stabilizing circuit module is further connected to the positive terminal of the fixed gain error amplifier through a fifth resistor and a sixth resistor.

[0019] In one embodiment, the voltage stabilizing circuit module is further connected to the internal regulating module via a switch, so as to control the on and off of the voltage stabilizing circuit module.

[0020] A power supply device comprises the above-mentioned semiconductor integrated circuit for power supply.

[0021] The above-mentioned semiconductor integrated circuit for power supply and power supply device, the voltage conversion circuit module accelerates the conversion speed of the signal edge through multiple monostable circuits, and when data is transmitted between different ports, it can accurately control the opening of the corresponding PMOS and NMOS transistors, and turn on the corresponding transistors according to the corresponding control logic at the rising edge and the falling edge, effectively improving the efficiency and accuracy of signal transmission; at the same time, the above-mentioned voltage stabilizing circuit module can make the power supply output a stable working voltage, reduce the adverse effects of voltage fluctuations on the power-consuming equipment, and improve the reliability and stability of the circuit operation. At the same time, the application also provides a clock generator module, which works with the voltage conversion circuit module and the voltage stabilizing circuit coordination module to provide a stable and accurate clock signal, ensure that the signal transmission, transistor control and other operations in the voltage conversion circuit module can be carried out according to the accurate timing, and also allow the various components in the voltage stabilizing circuit module, such as oscillators, comparators, etc., to coordinate in an orderly manner based on the precise clock, to ensure that the entire semiconductor integrated circuit for power supply is efficient and stable, and to improve the overall performance of the power supply. For the use of high-frequency power supplies, such as high-frequency power supplies exceeding 120k Hz for server power supply, etc., it can also enhance the power supply stability, reduce energy loss, and enhance the adaptability to various electronic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the composition of an exemplary integrated circuit module for power supply;

[0023] Figure 2 is a schematic diagram of an exemplary voltage conversion circuit module;

[0024] Figure 3 is a schematic diagram of an exemplary voltage stabilizing circuit module;

[0025] Figure 4 is a schematic diagram of an example clock generator circuit module. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] In the embodiments of the present application, the words "first", "second" and the like are used to distinguish between identical or similar items having substantially the same effects and functions, "at least one" means one or more, and "multiple" means two or more, for example, multiple objects refer to two or more objects. "Include" or "comprises" and similar words mean that the information appearing before "include" or "comprises" covers the information listed after "include" or "comprises" and its equivalents, and does not exclude other information. "And / or" mentioned in the embodiments of the present application indicates that three types of relationships may exist, and the character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0028] It should be noted that in this application, resistance and resistor, capacitance and capacitor, etc. have equivalent meanings. Resistance value and resistance value have equivalent meanings. In some cases, circuit and circuit module also have equivalent meanings, which will not be repeated here.

[0029] refer to Figure 1 and Figure 2 A semiconductor integrated circuit for power supply includes: a voltage conversion circuit module 103, a voltage stabilizing circuit module 104, and a clock generator module 101, wherein the clock generator module 101 is connected to the voltage conversion circuit module 103, the voltage conversion circuit module 103 is connected to the voltage stabilizing circuit module 104, and the voltage conversion circuit module 103 is also connected to a power supply 102;

[0030] Wherein, the voltage conversion circuit module 103 includes:

[0031] Two voltage input ports, a first voltage input port V1 and a second voltage input port V2, respectively provide working voltage input to the voltage conversion circuit module 103, and the voltage stabilization circuit module 104 outputs voltage to power the electrical device 105;

[0032] A plurality of monostable circuits, wherein the plurality of monostable circuits are used to accelerate the switching speed of the signal edge;

[0033] A first port A and a second port B, wherein the first port A is connected to the power supply 102 and the second port B is connected to the voltage stabilizing circuit module 104.

[0034] When data is transmitted from the first port A to the second port B, during the rising edge, the third monostable circuit turns on the transistor MOS3, and during the falling edge, the fourth monostable circuit turns on the transistor MOS4, and

[0035] When data is transmitted from the second port B to the first port A, during a rising edge, the first monostable circuit turns on the transistor MOS2, and during a falling edge, the second monostable circuit turns on the transistor MOS1; and

[0036] Two pull-up resistors R3 and R4, when the output of the voltage conversion circuit module 103 drives a low level, the values ​​of the two pull-up resistors R3 and R4 are one resistance value, and when the output of the voltage conversion circuit module 103 drives a high level, the values ​​of the two pull-up resistors R3 and R4 are another resistance value, wherein the one resistance value is greater than the other resistance value.

[0037] For example, when the output of the voltage conversion circuit module 103 drives a low level, the values ​​of the two pull-up resistors R3 and R4 are set to 400 ohms, and when the output of the voltage conversion circuit module 103 drives a high level, the values ​​of the two pull-up resistors R3 and R4 are set to 40 ohms.

[0038] When the output is driven low, it means that the output of the circuit is in a low state. At this time, the pull-up resistors R3 and R4 pull up the output voltage. Their resistance values ​​are relatively large to provide appropriate DC bias and driving capability to ensure that the circuit can work normally in this state and affect the output electrical characteristics to a certain extent, such as reducing static power consumption.

[0039] The voltage conversion circuit module 103 also includes resistors R1 and R2 and a transistor as a bias switch. In addition, the voltage conversion circuit module 103 also includes: a converter T1 connected to the input ends of the third monostable circuit and the fourth monostable circuit; and a converter T2 connected to the input ends of the first monostable circuit and the second monostable circuit.

[0040] In this embodiment, by precisely controlling the opening of PMOS and NMOS transistors at the rising and falling edges of data transmission at different ports, and the topological design of the above circuit, more refined logic control is achieved. Compared with the transistor control method that may be more extensive in the existing circuit, this circuit allows data to be transmitted in an orderly and efficient manner between the power supply 102 and the power-consuming device 105 according to strict settings, reducing signal transmission errors and interference, and improving the overall reliability of the circuit.

[0041] As an embodiment, the pull-up resistors R3 and R4 are variable resistors, and the resistance values ​​of the pull-up resistors R3 and R4 are automatically switched according to the output level of the voltage conversion circuit module 103. The switching process is controlled by the control logic inside the voltage conversion circuit module 103, and the control logic generates a corresponding control signal according to the level state of the output signal to ensure that the pull-up resistors R3 and R4 provide corresponding resistance values ​​under different working states. The resistance value will change dynamically according to the output level, with a large resistance value when the output is low and a small resistance value when the output is high.

[0042] As an embodiment, during the data transmission process, the conduction and cutoff of the MOS tube are controlled by a monostable circuit to accelerate the rising and falling edge conversion of the signal, wherein the trigger signals of multiple monostable circuits are derived from the changes in the first voltage of the first voltage input port V1 and the second voltage of the second voltage input port V2, and the pulse widths output by the multiple monostable circuits can be adjusted to adapt to different data transmission rate requirements.

[0043] Compared with circuits with fixed pulse widths that can only be applied to a single or limited number of transmission rates, this embodiment greatly improves the versatility of the circuit. Whether in simple and low-speed data acquisition systems or in high-speed and complex communication equipment and other different application scenarios, it can function stably and reliably, without the need to frequently replace circuit modules due to changes in transmission rates, thereby reducing design costs and usage costs.

[0044] refer to Figure 3 As an embodiment, the voltage stabilizing circuit module 104 includes: an internal regulation module, which provides a stable operating voltage for the internal circuit of the chip; a fixed gain error amplifier, which compares the feedback signal of the output voltage with the bandgap reference voltage to generate an error signal; an oscillator, which generates a pulse signal of a fixed frequency to control the on and off of the switch tube; a comparator, which compares the output of the fixed gain error amplifier with the pulse signal generated by the oscillator to generate a control signal; a latch, which is used to maintain the output state of the comparator to ensure the stability of the on and off time of the switch tube; a thermal shutdown circuit, which is used to monitor the temperature and output a shutdown signal when the temperature exceeds the set threshold; a driver, which is used to drive the switch tube to achieve voltage adjustment.

[0045] As an embodiment, the output end of the voltage stabilizing circuit module 104 is connected to the first end of the inductor, the first end of the inductor is also connected to the cathode of the diode, and the anode of the diode is grounded; the second end of the inductor is connected to the capacitor.

[0046] This embodiment can prevent reverse current and protect circuit components, while optimizing inductor energy and improving circuit dynamic response.

[0047] As an embodiment, the output end of the voltage stabilizing circuit module 104 is further connected to the positive terminal of the fixed gain error amplifier through a fifth resistor and a sixth resistor.

[0048] This embodiment can control the input value of the fixed gain error amplifier as required to ensure the accuracy and effectiveness of the feedback signal, and at the same time enable the voltage stabilizing circuit module 104 to quickly and accurately adjust its own working state according to the feedback information.

[0049] As an embodiment, the voltage stabilizing circuit module 104 is further connected to the internal regulating module via a switch, so as to control the on and off of the voltage stabilizing circuit module 104 .

[0050] An embodiment of the power supply device is described below.

[0051] In one embodiment, a power supply device includes the above-mentioned semiconductor integrated circuit for power supply.

[0052] In one embodiment, reference Figure 4The clock generator module 101 may specifically include a reference oscillator, three phase-locked loops (a first phase-locked loop, a second phase-locked loop, and a third phase-locked loop), four multiplexers (a first multiplexer, a second multiplexer, a third multiplexer, and a fourth multiplexer), four output frequency dividers (a first output frequency divider, a second output frequency divider, a third output frequency divider, and a fourth output frequency divider), a bus interface, a read-only memory (e.g., a programmable read-only memory), and a clock output signal terminal. The crystal oscillator input terminal and output terminal provide a reference clock frequency for the entire circuit, and are the clock source for other modules to work; each phase-locked loop includes a reference frequency divider, a phase frequency detector, a charge pump, a filter, a voltage-controlled oscillator, and a feedback frequency divider. Its function is to multiply the input reference frequency to the required frequency, and to achieve accurate frequency synthesis by accurately controlling the frequency division ratio of the reference frequency divider and the feedback frequency divider; the feedback frequency divider feeds the output frequency of the voltage-controlled oscillator back to the phase frequency detector to form a closed-loop control, so that the voltage-controlled oscillator outputs a stable target frequency. The first multiplexer, the second multiplexer, the third multiplexer, and the fourth multiplexer select one of the three phase-locked loop frequencies or reference frequencies as the input of the output divider, and select the input source through the control bit to realize flexible switching of the frequency. Multiple output dividers further divide the input frequency to obtain the required final clock frequency output. The programmable read-only memory is used to store the configuration information of the device, such as the setting parameters of the phase-locked loop, etc., which can realize the instant customization of the device to meet the needs of different users; the bus interface is connected to the power-down control / serial clock port and the output enable / serial data port, which can be used to communicate with external devices, realize the programming of the programmable read-only memory or chip control register, and configure the working parameters of the chip; the power-down control end is controlled by the mode selection pin to manage the power consumption mode of the chip. The output of the crystal oscillator is connected to the reference input of the three phase-locked loops to provide a reference frequency for the phase-locked loop. The output of each phase-locked loop is connected to the corresponding multiplexer input, and the output of the multiplexer is connected to the post-divider. The programmable read-only memory is connected to the phase-locked loop and other control logic through the internal bus to provide configuration data for them. The bus interface is connected to the programmable read-only memory and the internal control logic of the chip to realize the transmission of the control signal. The output of the post-divider is connected to the corresponding clock output pin to provide the final clock signal (the first clock signal, the second clock signal, the third clock signal and the fourth clock signal).

[0053] The reference frequency generated by the crystal oscillator is input to the phase-locked loop, which adjusts the output frequency of the voltage-controlled oscillator through the reference divider and the feedback divider according to the configuration parameters stored in the programmable read-only memory. The multiplexer selects the appropriate frequency source according to the control signal and inputs it to the post-divider, which further divides the input frequency and outputs it. The configuration data in the programmable read-only memory can be modified through the bus interface, thereby changing the operating parameters of the phase-locked loop and other modules, and realizing instant customization of the clock frequency. In the run mode, the chip automatically runs according to the settings pre-stored in the programmable read-only memory and outputs the required clock frequency.

[0054] The phase-locked loop also includes a phase lock detection module. The phase-locked loop compares the phase difference between the input reference frequency and the output signal of the feedback divider. When the phase difference is less than the window time corresponding to the set phase difference and reaches a certain number of cycles, a lock signal is output. Furthermore, in order to improve the stability of phase lock, a delay mechanism is also set, specifically, the delayed input of the reference frequency is set, and the discharge current delay of the charge pump is set, and the specific delay step of the charge pump is set to

[0055]

[0056] Where t is the delay step, nA is nanoampere, and I CP represents the charge pump current, f PFD Represents the phase frequency detector frequency. Through the above settings, the above precise delay adjustment mechanism can effectively deal with various interference factors in a complex system environment and maintain the stability of phase lock. Through the setting of the delay step of the above charge pump, the performance indicators such as the locking time and phase noise of the phase-locked loop can be optimized to better meet the needs of specific applications. The appropriate delay step setting can shorten the locking time of the phase-locked loop and improve the response speed of the system, while reducing phase noise and improving signal quality. When changes in environmental conditions cause deviations in signal delays, the delay adjustment function of the charge pump can be used to compensate for these deviations so that the phase-locked loop can continue to work stably and output reliable signals.

[0057] In this embodiment, the corresponding frequency source can be quickly and conveniently switched to according to different working modes, different functional requirements or different external conditions, without complicated changes to the hardware circuit, which greatly improves the adaptability of the circuit to various application scenarios. At the same time, it provides highly accurate frequency synthesis capabilities, so that the circuit can generate a variety of accurate clock frequencies according to specific needs, meet the strict requirements of different modules on clock accuracy, ensure that each module runs stably and efficiently under the optimal clock drive, and improve the performance and reliability of the entire circuit system.

[0058] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A semiconductor integrated circuit for power supply, characterized in that: The semiconductor integrated circuit for power supply includes: a voltage conversion circuit module, a voltage stabilizing circuit module, and a clock generator module, wherein the clock generator module is connected to the voltage conversion circuit module, the voltage conversion circuit module is connected to the voltage stabilizing circuit module, and the voltage conversion circuit module is also connected to the power supply; Wherein, the voltage conversion circuit module includes: Two voltage input ports, a first voltage input port V1 and a second voltage input port V2, respectively provide working voltage input for the voltage conversion circuit module; A plurality of monostable circuits, wherein the plurality of monostable circuits are used to accelerate the switching speed of the signal edge; a first port and a second port, wherein the first port is connected to the power supply, and the second port is connected to the voltage stabilizing circuit module; When data is transmitted from the first port to the second port, during the rising edge, the third monostable circuit turns on the transistor MOS3, and during the falling edge, the fourth monostable circuit turns on the transistor MOS4, and Wherein, when data is transmitted from the second port to the first port, during a rising edge, the first monostable circuit turns on the transistor MOS2, and during a falling edge, the second monostable circuit turns on the transistor MOS1; and Two pull-up resistors R3 and R4, when the output of the voltage conversion circuit module drives a low level, the values ​​of the two pull-up resistors R3 and R4 are one resistance value, and when the output of the voltage conversion circuit module drives a high level, the values ​​of the two pull-up resistors R3 and R4 are another resistance value, wherein the one resistance value is greater than the other resistance value.

2. The semiconductor integrated circuit for power supply according to claim 1, wherein: The pull-up resistor is a variable resistor, and the resistance value of the pull-up resistor is automatically switched according to the output level of the voltage conversion circuit module. The switching process is controlled by the control logic inside the voltage conversion circuit module. The control logic generates a corresponding control signal according to the level state of the output signal to ensure that the pull-up resistor provides a corresponding resistance value under different working states.

3. The semiconductor integrated circuit for power supply according to claim 2, characterized in that: in, The trigger signals of the multiple monostable circuits are derived from the changes of the first voltage of the first voltage input port V1 and the second voltage of the second voltage input port V2, and the pulse widths output by the multiple monostable circuits can be adjusted to meet different data transmission rate requirements.

4. The semiconductor integrated circuit for power supply according to claim 1, wherein: The voltage stabilizing circuit module comprises: Internal regulation module, providing stable operating voltage for the internal circuit of the chip; A fixed gain error amplifier compares a feedback signal of an output voltage with a bandgap reference voltage to generate an error signal; Oscillator, which generates a pulse signal with a fixed frequency to control the on and off of the switch tube; A comparator compares the output of the fixed gain error amplifier with the pulse signal generated by the oscillator to generate a control signal; The latch is used to maintain the output state of the comparator and ensure the stability of the on and off time of the switch tube; Thermal shutdown circuit, used to monitor temperature and output a shutdown signal when the temperature exceeds a set threshold; Driver, used to drive the switch tube to achieve voltage conversion.

5. The semiconductor integrated circuit for power supply according to claim 4, characterized in that: The output end of the voltage stabilizing circuit module is connected to the first end of the inductor, the first end of the inductor is also connected to the cathode of the diode, and the anode of the diode is grounded; the second end of the inductor is connected to the capacitor.

6. The semiconductor integrated circuit for power supply according to claim 5, characterized in that: The output end of the voltage stabilizing circuit module is also connected to the positive terminal of the fixed gain error amplifier through a fifth resistor and a sixth resistor.

7. The semiconductor integrated circuit for power supply according to claim 5, characterized in that: The voltage stabilizing circuit module is also connected to the internal regulating module via a switch, so as to control the on and off of the voltage stabilizing circuit module.

8. A power supply device, characterized in that: A semiconductor integrated circuit for power supply according to any one of claims 1 to 7 is included.

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