A semiconductor integrated circuit for a power supply and a power supply device

Abstract

The application relates to the technical field of power supplies, and discloses a semiconductor integrated circuit for a power supply and a power supply device, which accelerates the conversion speed of signal edges through multiple monostable circuits of a voltage conversion circuit module, opens corresponding transistors according to corresponding control logic at rising edges and falling edges, effectively improves the efficiency and accuracy of signal transmission, makes the power supply output stable working voltage, reduces the adverse effects on electric equipment caused by voltage fluctuation, improves the reliability and stability of circuit operation, and simultaneously, the modules work cooperatively to provide stable and accurate clock signals, ensure that signal transmission, transistor control and other operations in the voltage conversion circuit module can be performed according to accurate timing, and also enable components such as oscillators and comparators in the voltage stabilization circuit module to cooperatively and orderly based on accurate clock, guarantee that the semiconductor integrated circuit for a power supply operates efficiently and stably, improve the overall performance of the power supply, and enhance the adaptability to various electronic equipment.

Description

TECHNICAL FIELD

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

[0002] With the continuous development of electronic devices, the performance requirements for power supply are becoming 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 are difficult to meet the power supply needs of various complex and high-precision electronic devices. Especially for some high-frequency power supplies, the requirement for stable power supply is very high. In order to solve these problems, it is necessary to design a semiconductor integrated circuit for power supply with high integration degree and better performance and a corresponding power supply device. SUMMARY

[0003] Therefore, it is necessary to provide a semiconductor integrated circuit for power supply and a power supply device comprising the same to effectively meet the power needs of various electronic devices in view of 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 connected to a power supply.

[0005] The voltage conversion circuit module comprises:

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

[0007] a plurality of monostable circuits for accelerating the conversion speed of signal edges;

[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] wherein 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 the rising edge, the first monostable circuit turns on the transistor MOS2, and during the 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 low level, the values of the two pull-up resistors R3 and R4 are a resistance value, and when the output of the voltage conversion circuit module drives 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 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 high level, the values of the two pull-up resistors R3 and R4 are set to 40 ohms.

[0013] When the output drives low level, it means that the output end of the circuit is in a low level state, at this time the pull-up resistor pulls up the output end voltage, and its resistance value is relatively large to provide appropriate DC bias and driving capability, ensuring that the circuit can work normally in this state, and to a certain extent, affecting the electrical characteristics of the output, 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, and 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 in different working states. The resistance value will change dynamically according to the output level, and the resistance value will be large when the output is low, and the resistance value will be small when the output is high.

[0015] In one embodiment, during data transmission, the on and off of the transistor is controlled by the monostable circuit to accelerate the rising and falling edge conversion of the signal, wherein the trigger signal of the plurality of monostable circuits is derived from the change 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 width output by the plurality of monostable circuits can be adjusted to adapt to different data transmission rate requirements.

[0016] In one embodiment, the voltage stabilizing circuit module comprises: an internal adjusting module for providing stable operating voltage for internal circuits of the chip; a fixed gain error amplifier for comparing the feedback signal of the output voltage with the bandgap reference voltage to generate an error signal; an oscillator for generating a pulse signal of a fixed frequency to control the on and off of the switch tube; a comparator for comparing the output of the fixed gain error amplifier with the pulse signal generated by the oscillator to generate a control signal; a latch for maintaining the output state of the comparator to ensure the on and off time of the switch tube stable; a thermal shutdown circuit for monitoring the temperature and outputting a shutdown signal when the temperature exceeds a set threshold; and a driver for driving the switch tube to realize voltage adjustment.

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

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

[0019] In one embodiment, the voltage stabilizing circuit module is also connected to the internal regulating module through a switch for controlling the opening and closing of the voltage stabilizing circuit module.

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

[0021] The above-mentioned power supply semiconductor integrated circuit and power supply device, the voltage conversion circuit module accelerates the conversion speed of the signal edge through multiple monostable circuits, and when transmitting data between different ports, the corresponding PMOS and NMOS transistors can be accurately controlled to open, and the corresponding transistors are opened 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 on the electrical equipment caused by voltage fluctuations, and improve the reliability and stability of the circuit operation. At the same time, the present application also provides a clock generator module, which works with the voltage conversion circuit module and the voltage stabilizing circuit module to provide a stable and accurate clock signal, ensuring that the signal transmission, transistor control and other operations in the voltage conversion circuit module can be performed according to the accurate timing, and also allowing the components such as oscillators and comparators in the voltage stabilizing circuit module to be orderly coordinated based on the accurate clock, ensuring that the entire power supply semiconductor integrated circuit operates efficiently and stably, improving the overall performance of the power supply. For the use of high-frequency power supply, such as super 120k hertz high-frequency power supply for server power supply, etc., the power supply stability can also be enhanced, the energy loss can be reduced, and the adaptability to various electronic equipment can be enhanced. BRIEF DESCRIPTION OF DRAWINGS

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

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

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

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

[0026] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0027] In the embodiments of the present application, the terms "first", "second", and the like are used to distinguish the same or similar items with substantially the same function and role, "at least one" means one or more, "a plurality of" means two or more, for example, a plurality of objects means two or more objects. The terms "include" or "contain" and the like mean that the information appearing before "include" or "contain" covers the information listed after "include" or "contain" and its equivalents, and does not exclude other information. In the embodiments of the present application, "and / or" means that there can be three relationships, and the character " / " generally means that the associated objects before and after are in an "or" relationship.

[0028] It should be noted that in the present application, resistance and resistor, capacitance and capacitor, etc. have the same meaning. Resistance value and resistance value have the same meaning. In some cases, circuit and circuit module also have the same meaning, which will not be described here.

[0029] Reference Figure 1 and Figure 2 A power supply semiconductor integrated circuit includes: a voltage conversion circuit module 103, a voltage stabilizing circuit module 104, a clock generator module 101, the clock generator module 101 is connected with the voltage conversion circuit module 103, the voltage conversion circuit module 103 is connected with the voltage stabilizing circuit module 104, and the voltage conversion circuit module 103 is connected with the power supply 102 at the same time;

[0030] 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 for the voltage conversion circuit module 103, and the output voltage of the voltage stabilizing circuit module 104 is used to supply power to the power consuming device 105;

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

[0033] A first port A and a second port B, 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 transmitting data from the first port A to the second port B, the third monostable circuit turns on the transistor MOS3 during the rising edge, and the fourth monostable circuit turns on the transistor MOS4 during the falling edge, and

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

[0036] The two pull-up resistors R3 and R4 have a resistance value when the output of the voltage conversion circuit module 103 drives a low level, and have another resistance value when the output of the voltage conversion circuit module 103 drives a high level, 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 drives a low level, it means that the output end of the circuit is in a low level state, at this time the pull-up resistors R3 and R4 pull up the output end voltage, and 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 to some extent affect the electrical characteristics of the output, such as reducing static power consumption.

[0039] The voltage conversion circuit module 103 further comprises resistors R1 and R2 and a transistor as a bias switch. In addition, the voltage conversion circuit module 103 further comprises 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 turning on of PMOS and NMOS transistors at the rising edge and the falling edge of data transmission at different ports, and by the topology design of the above-mentioned circuit, more refined logic control is achieved. Compared with the possible rough transistor control method of the existing circuit, the present circuit can make the data transmitted between the power supply 102 and the electrical equipment 105 in strict and efficient order according to the strict setting, reduce signal transmission errors and interference, and improve the overall reliability of the circuit.

[0041] As an example, 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, and the switching process is controlled by the control logic inside the voltage conversion circuit module 103. 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 in different working states. The resistance value will change dynamically according to the output level. When the output is low, the resistance value is large, and when the output is high, the resistance value is small.

[0042] As an example, during data transmission, the conduction and cutoff of the MOS tube are controlled by the monostable circuit to accelerate the rising and falling edge conversion of the signal. The trigger signal of the multiple monostable circuits is 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 width output by the multiple monostable circuits can be adjusted to adapt to different data transmission rate requirements.

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

[0044] Reference Figure 3 As an example, the voltage stabilizing circuit module 104 includes: an internal regulating module for providing stable operating voltage for the internal circuit of the chip; a fixed gain error amplifier for comparing the feedback signal of the output voltage with the bandgap reference voltage to generate an error signal; an oscillator for generating a fixed frequency pulse signal to control the conduction and cutoff of the switch tube; a comparator for comparing the output of the fixed gain error amplifier with the pulse signal generated by the oscillator to generate a control signal; a latch for maintaining the output state of the comparator to ensure the conduction and cutoff time of the switch tube stable; a thermal shutdown circuit for monitoring the temperature and outputting a shutdown signal when the temperature exceeds a set threshold; and a driver for driving the switch tube to realize voltage adjustment.

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

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

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

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

[0049] As an example, the voltage stabilizing circuit module 104 is also connected to the internal regulating module through a switch, which is used to control the opening and closing of the voltage stabilizing circuit module 104.

[0050] The following describes an embodiment of the power supply device.

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

[0052] In one embodiment, the reference Figure 4, the clock generator module 101 can 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 dividers (a first output divider, a second output divider, a third output divider, and a fourth output divider), a bus interface, a read-only memory (for example, a programmable read-only memory), and a clock output signal terminal, wherein the crystal oscillator input terminal and the output terminal provide a reference clock frequency for the entire circuit and are a clock source for the work of other modules; each phase-locked loop includes a reference divider, a phase frequency detector, a charge pump, a filter, a voltage-controlled oscillator, and a feedback divider. The role is to multiply the input reference frequency to the required frequency, and the frequency is accurately synthesized by accurately controlling the frequency division ratio of the reference divider and the feedback divider; the feedback divider feeds back the output frequency of the voltage-controlled oscillator 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 the reference frequency as the input of the output divider, and select the input source by controlling the bit to realize flexible switching of the frequency. The plurality of 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, and can realize instant customization of the device to meet different user needs; the bus interface is connected with the power-down control / serial clock port and the output enable / serial data port, and can be used for communication with external devices to realize programming of the programmable read-only memory or chip control register and configuration of the working parameters of the chip; the power-down control terminal is controlled by the mode selection pin and is used for managing the power consumption mode of the chip. The output of the crystal oscillator is connected to the reference input terminals of the three phase-locked loops to provide a reference frequency for the phase-locked loops. The outputs of each phase-locked loop are respectively connected to the corresponding multiplexer input terminals, and the output of the multiplexer is connected to the post-divider. The programmable read-only memory is connected with the phase-locked loop and other control logic through an internal bus to provide configuration data for them. The bus interface is connected with the programmable read-only memory and the chip internal control logic to realize transmission of control signals. The output of the post-divider is connected to the corresponding clock output pin to provide the final clock signal (a first clock signal, a second clock signal, a third clock signal, and a 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 frequency divider and the feedback frequency divider according to the configuration parameters stored in the programmable read-only memory. The multiplexer selects the appropriate frequency source input to the post-divider according to the control signal, and the post-divider 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 working parameters of the phase-locked loop and other modules to achieve real-time customization of the clock frequency. In the running 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 further comprises 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 frequency divider through the phase frequency detector, and outputs a lock signal when the phase difference is less than the window time corresponding to the set phase difference for a certain number of cycles. Further, in order to improve the stability of the phase lock, a delay mechanism is provided, specifically, a delay input of the reference frequency is set, and a delay of the charge pump discharge current is set, and the specific delay step size of the charge pump is set to

[0055]

[0056] Where t represents the delay step size, nA represents nanoampere, I CP represents the charge pump current, f PFD represents the phase frequency detector frequency. Through the above-mentioned precise delay adjustment mechanism, various interference factors in complex system environments can be effectively dealt with, and the stability of the phase lock can be maintained. Through the setting of the delay step size of the charge pump, the performance indicators such as the lock time and the phase noise of the phase-locked loop can be optimized, so that it better meets the needs of specific applications. The appropriate delay step size setting can shorten the lock time of the phase-locked loop, improve the response speed of the system, reduce the phase noise, and improve the signal quality. When the signal delay deviates due to changes in environmental conditions, 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, different frequency sources can be quickly and conveniently switched according to different working modes, different functional requirements or different external conditions, without the need for complex modifications to the hardware circuit, greatly improving the adaptability of the circuit to diversified application scenarios. At the same time, a highly precise frequency synthesis capability is provided, so that the circuit can generate various accurate clock frequencies according to specific needs, meet the strict requirements of different modules for clock accuracy, ensure that each module runs stably and efficiently under the best clock driving, and improve the performance and reliability of the entire circuit system.

[0058] The above embodiments only express several implementation ways of the present application, and the description is specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A semiconductor integrated circuit for a power supply, characterized by comprising: The power supply semiconductor integrated circuit comprises: a voltage conversion circuit module, a voltage stabilizing circuit module, a clock generator module connected with the voltage conversion circuit module, and the voltage conversion circuit module connected with the voltage stabilizing circuit module, and the voltage conversion circuit module connected with the power supply at the same time; The voltage conversion circuit module comprises: Two voltage input ports, a first voltage input port V1 and a second voltage input port V2, respectively providing working voltage input for the voltage conversion circuit module; A plurality of monostable circuits for accelerating the conversion speed of signal edges; A first port connected to the power supply and a second port connected to the voltage stabilizing circuit module, When transmitting data from the first port to the second port, during the rising edge, the third monostable circuit opens the transistor MOS3, and during the falling edge, the fourth monostable circuit opens the transistor MOS4, and When transmitting data from the second port to the first port, during the rising edge, the first monostable circuit opens the transistor MOS2, and during the falling edge, the second monostable circuit opens the transistor MOS1; and Two pull-up resistors R3 and R4, when the output of the voltage conversion circuit module drives low, the values of the two pull-up resistors R3 and R4 are a resistance value, and when the output of the voltage conversion circuit module drives high, 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; The transistor MOS1 has its gate connected to the output of the second monostable circuit, its source grounded, and its drain connected to the first port; the transistor MOS2 has its gate connected to the output of the first monostable circuit, its source connected to the first voltage input port V1, and its drain connected to the first port; the transistor MOS3 has its gate connected to the output of the third monostable circuit, its source connected to the second voltage input port V2, and its drain connected to the second port; the transistor MOS4 has its gate connected to the output of the fourth monostable circuit, its source grounded, and its drain connected to the second port; one end of the pull-up resistor R3 is connected to the first port, and the other end is connected to the first voltage input port V1; one end of the pull-up resistor R4 is connected to the second voltage input port V2, and the other end is directly connected to the second port of the voltage conversion circuit module.

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

3. The semiconductor integrated circuit for a power supply according to claim 2, characterized by The trigger signals of the plurality of 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 width output by the plurality of monostable circuits can be adjusted to adapt to different data transmission rate requirements. ​ 4. The semiconductor integrated circuit for a power supply according to claim 1, characterized by The voltage stabilizing circuit module comprises: an internal regulating module for providing stable working voltage for internal circuits of the chip; a fixed gain error amplifier for comparing a feedback signal of the output voltage with a bandgap reference voltage to generate an error signal; an oscillator for generating a pulse signal of fixed frequency to control on and off of the switch tube; a comparator for comparing the output of the fixed gain error amplifier with the pulse signal generated by the oscillator to generate a control signal; a latch for keeping the output state of the comparator to ensure stable on and off time of the switch tube; a thermal shutdown circuit for monitoring temperature and outputting a shutdown signal when the temperature exceeds a set threshold; and 5. The semiconductor integrated circuit for a power supply according to claim 4, wherein a driver for driving the switch tube to realize voltage conversion.

6. The semiconductor integrated circuit for a power supply according to claim 5, wherein The output end of the voltage stabilizing circuit module is connected to a first end of an inductor, the first end of the inductor is also connected to a cathode of a diode, an anode of the diode is grounded, and a second end of the inductor is connected to a capacitor.

7. The semiconductor integrated circuit for a power supply according to claim 5, wherein The output end of the voltage stabilizing circuit module is also connected to a positive electrode end of the fixed gain error amplifier through a fifth resistor and a sixth resistor.

8. A power supply device characterized by comprising: The voltage stabilizing circuit module is also connected to the internal regulating module through a switch for controlling on and off of the voltage stabilizing circuit module. A semiconductor integrated circuit for power supply comprising any one of the semiconductor integrated circuits according to claims 1-7.

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