A high integration combined control circuit

Abstract

The application relates to the technical field of power supply control, in particular to a high-integration combined control circuit. In the application, a current circuit, a capacitor circuit, a clock signal circuit, a compensation signal circuit and a temperature protection signal circuit are arranged in the circuit to form the combined control circuit, that is, a single control circuit is adopted to obtain the clock signal, the compensation signal and the temperature protection signal, so that the area of a switching power supply control chip is reduced, and the integration of the switching power supply control chip is improved.

Description

Technical Field

[0001] This invention relates to the field of power control technology, and more specifically to a highly integrated combined control circuit. Background Technology

[0002] Existing switching power supply control chips typically require multiple control signals, such as clock signals, compensation signals, and protection signals. However, in existing technologies, these control signals are all generated by separate control circuits, resulting in a large control circuit area and low integration, which is not conducive to miniaturizing the switching power supply. Summary of the Invention

[0003] In view of this, the present invention provides a highly integrated combined control circuit to solve the technical problem that in the prior art, multiple control signals in the switching power supply control chip are generated by separate control circuits, resulting in a large control circuit area and low integration.

[0004] The technical solution provided by this invention is as follows:

[0005] The first aspect of the present invention provides a highly integrated combined control circuit, comprising: a current circuit, a capacitor circuit, a clock signal circuit, a compensation signal circuit, and a temperature protection signal circuit;

[0006] The current circuit is used to provide operating current for the capacitor circuit, the clock signal circuit, and the temperature protection signal circuit.

[0007] The capacitor circuit is used to charge based on the operating current. When the charging voltage reaches a first voltage threshold, the clock signal circuit outputs a high-level clock signal based on the first voltage threshold and the operating current, and controls the capacitor circuit to discharge based on the high-level clock signal. When the discharge voltage reaches a second voltage threshold, the clock signal circuit outputs a low-level clock signal based on the second voltage threshold and the operating current, and controls the capacitor circuit to charge based on the low-level clock signal. After that, the clock signal circuit cyclically outputs high-level clock signals and low-level clock signals.

[0008] The compensation signal circuit is used to output a changing compensation signal based on the changes in the charging voltage and discharging voltage of the capacitor circuit.

[0009] The temperature protection signal circuit is used to generate a reference voltage based on the operating current, and to generate different voltage signals when the temperature changes, and to generate a temperature protection signal based on the reference voltage and the different voltage signals.

[0010] In one optional implementation, when the temperature is below a first temperature threshold, the temperature protection signal circuit generates a first voltage signal and simultaneously operates in a first working state, generating a first reference voltage based on the operating current provided by the current circuit. The temperature protection signal circuit outputs a low-level temperature protection signal based on the first voltage signal and the first reference voltage. When the temperature is above the first temperature threshold, the temperature protection signal circuit generates a second voltage signal and outputs a high-level temperature protection signal based on the second voltage signal and the first reference voltage, thus entering a second working state where a second reference voltage is generated based on the operating current provided by the current circuit. When the temperature recovers to below the second temperature threshold, the temperature protection signal circuit generates a third voltage signal and outputs a low-level protection signal based on the third voltage signal and the second reference voltage, simultaneously re-entering the first working state where the first temperature threshold is greater than the second temperature threshold.

[0011] In one optional embodiment, the first terminal of the current circuit is connected to an external power supply, its second terminal is grounded, its third terminal is connected to the first terminal of the clock signal circuit, its fourth terminal is connected to the second terminal of the clock signal circuit, the first terminal of the capacitor circuit, and the first terminal of the compensation signal circuit, its fifth terminal is connected to the third terminal of the clock signal circuit, its sixth terminal is connected to the fourth terminal of the clock signal circuit and the second terminal of the capacitor circuit, its seventh terminal is connected to the third terminal of the capacitor circuit, its eighth terminal is connected to the first terminal of the temperature protection signal circuit, and its ninth terminal is connected to the second terminal of the temperature protection signal circuit; the fifth terminal of the clock signal circuit is grounded, and its sixth terminal outputs a low-level clock signal or a high-level clock signal; the fourth terminal of the capacitor circuit is grounded; the second terminal of the compensation signal circuit is connected to an external power supply, its third terminal is grounded, and its fourth terminal outputs a compensation signal; the third terminal of the temperature protection signal circuit is grounded, and its fourth terminal outputs a temperature protection signal.

[0012] In one optional embodiment, the current circuit includes a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, and a first current source;

[0013] The first terminal of the first switch is connected to the first terminals of the second switch, the third switch, the fourth switch, the fifth switch, the sixth switch, the seventh switch, the eighth switch, and an external power supply. The second terminal of the first switch is connected to its third terminal, the second terminal of the second switch, the second terminal of the third switch, the second terminal of the fourth switch, the second terminal of the fifth switch, the second terminal of the sixth switch, the second terminal of the seventh switch, the second terminal of the eighth switch, and one terminal of the first current source.

[0014] The other end of the first current source is grounded. The third end of the second switch is connected to the first end of the clock signal circuit. The third end of the third switch is connected to the second end of the clock signal circuit, the first end of the capacitor circuit, and the first end of the compensation signal circuit. The third end of the fourth switch is connected to the third end of the clock signal circuit. The third end of the fifth switch is connected to the fourth end of the clock signal circuit and the second end of the capacitor circuit. The third end of the sixth switch is connected to the third end of the capacitor circuit. The third end of the seventh switch is connected to the first end of the temperature protection signal circuit. The third end of the eighth switch is connected to the second end of the temperature protection signal circuit.

[0015] In one optional embodiment, the current circuit further includes a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, and a second current source; the first terminal of the ninth switch is connected to the second terminal of the first switch, the second terminal of the ninth switch is connected to the first and second terminals of the tenth switch, the first terminal of the eleventh switch, and the first terminal of the twelfth switch, the third terminal of the ninth switch is connected to the third terminal of the first switch and one terminal of the first current source, the third terminal of the tenth switch is connected to an external power supply, the second terminal of the tenth switch is connected to its third terminal and one terminal of the second current source, the other terminal of the second current source is grounded, the second terminal of the eleventh switch is connected to the third terminal of the third switch, the third terminal of the eleventh switch is connected to the second terminal of the clock signal circuit, the first terminal of the capacitor circuit, and the first terminal of the compensation signal circuit, the second terminal of the twelfth switch is connected to the third terminal of the eighth switch, and the third terminal of the twelfth switch is connected to the second terminal of the temperature protection signal circuit.

[0016] In one optional implementation, the clock signal circuit includes a thirteenth switch, a fourteenth switch, a fifteenth switch, a first inverter, a second inverter, a third inverter, a first NOR gate, and a second NOR gate.

[0017] The first terminal of the thirteenth switch is connected to the third terminal of the current circuit and the first terminal of the fourteenth switch. The second terminal of the thirteenth switch is grounded. The third terminal of the thirteenth switch is connected to the input terminal of the third inverter, the output terminal of the first NOR gate, and the first input terminal of the second NOR gate. The second terminal of the fourteenth switch is grounded. The third terminal of the fourteenth switch is connected to the first terminal of the fifteenth switch, the fourth terminal of the current circuit, the first terminal of the capacitor circuit, and the first terminal of the compensation signal circuit. The second terminal of the fifteenth switch is grounded. The third terminal of the fifteenth switch is connected to the input terminal of the first inverter and the fifth terminal of the current circuit. The output terminal of the first inverter is connected to the first input terminal of the first NOR gate. The second input terminal of the first NOR gate is connected to the output terminal of the second NOR gate. The input terminal of the second inverter is connected to the sixth terminal of the current circuit and the second terminal of the capacitor circuit. The output terminal of the second inverter is connected to the second input terminal of the second NOR gate. The output terminal of the third inverter outputs a low-level clock signal or a high-level clock signal.

[0018] In one optional embodiment, the capacitor circuit includes a sixteenth switch, a seventeenth switch, a first capacitor, and a first resistor; the first terminal of the sixteenth switch is connected to the sixth terminal of the current circuit and the fourth terminal of the clock signal circuit; the second terminal of the sixteenth switch is connected to the first and second terminals of the seventeenth switch and the seventh terminal of the current circuit; the third terminal of the sixteenth switch is connected to one terminal of the first capacitor, the fourth terminal of the current circuit, the second terminal of the clock signal circuit, and the first terminal of the compensation signal circuit; the other terminal of the first capacitor is connected to one terminal of the first resistor and grounded; and the other terminal of the first resistor is connected to the third terminal of the seventeenth switch.

[0019] In one optional embodiment, the compensation signal circuit includes an eighteenth switch, a nineteenth switch, a twentieth switch, a twenty-first switch, a second resistor, and a third resistor; one end of the second resistor is connected to the first terminal of the twentieth switch, the first terminal of the twenty-first switch, and an external power supply; the other end of the second resistor is connected to the first terminal of the eighteenth switch and the first terminal of the nineteenth switch; the second terminal of the eighteenth switch is connected to the first terminal of the capacitor circuit, the fourth terminal of the current circuit, and the second terminal of the clock signal circuit; the third terminal of the eighteenth switch is connected to one end of the third resistor and grounded; the other end of the third resistor is connected to the second terminal of the nineteenth switch; the third terminal of the nineteenth switch is connected to the second and third terminals of the twentieth switch and the second terminal of the twenty-first switch; and the third terminal of the twenty-first switch outputs a compensation signal.

[0020] In one optional embodiment, the temperature protection signal circuit includes a first transistor, a fourth resistor, a fifth resistor, a fourth inverter, and a twenty-second switch. The first terminal of the first transistor is connected to the input terminal of the fourth inverter, the first terminal of the twenty-second switch, and the eighth terminal of the current circuit. The second terminal of the first transistor is connected to one end of the fourth resistor and the ninth terminal of the current circuit. The third terminal of the first transistor is connected to one end of the fifth resistor, the second terminal of the twenty-second switch, and grounded. The other end of the fourth resistor is connected to the other end of the fifth resistor and the third terminal of the twenty-second switch. The output terminal of the fourth inverter outputs a temperature protection signal.

[0021] In one optional embodiment, the temperature protection signal circuit further includes a second capacitor and a third capacitor, the second capacitor being connected in parallel across the fourth resistor and the third capacitor being connected in parallel across the fifth resistor.

[0022] In one optional implementation, the combined control circuit further includes an output control circuit, which is configured to be in a turned-off state when a compensation signal needs to be output, and to be turned on and control the nineteenth switch to be in a turned-off state when a turn-off signal does not need to be output.

[0023] In one optional implementation, the first voltage threshold is the gate-source voltage difference when the fifteenth switch is working, and the second voltage threshold is the terminal voltage of the first resistor. When the combined control circuit enters a steady state, the terminal voltage of the first capacitor varies between the first voltage threshold and the second voltage threshold.

[0024] In one optional implementation, the first reference voltage is expressed by the following formula:

[0025]

[0026] The second reference voltage is expressed by the following formula:

[0027]

[0028] In the formula, This indicates that the current circuit provides the operating current for the temperature protection signal circuit. This indicates the resistance value of the fourth resistor. This indicates the resistance value of the fifth resistor.

[0029] The technical solution of this invention has the following advantages:

[0030] In this invention, a combined control circuit is formed by setting up a current circuit, a capacitor circuit, a clock signal circuit, a compensation signal circuit, and a temperature protection signal circuit in the circuit. That is, a clock signal, a compensation signal, and a temperature protection signal can be obtained by using a single control circuit, thereby reducing the area of ​​the switching power supply control chip and improving the integration of the switching power supply control chip.

[0031] In this invention, by setting a compensation signal output control circuit, the operation of the compensation signal circuit can be controlled according to actual needs; by setting a second capacitor and a third capacitor in the temperature protection signal circuit, the terminal voltages of the fourth resistor and the fifth resistor can be stabilized; by connecting an eleventh switch in series in the third switch branch and a twelfth switch in series in the eighth switch branch, the eleventh switch isolates the influence of the control terminal voltage of the fifteenth switch on the drain-source voltage difference of the third switch, and the twelfth switch isolates the influence of the base voltage of the first transistor on the drain-source voltage difference of the eighth switch. At the same time, by connecting a ninth switch in series in the first switch branch, the gate-source voltage difference and drain-source voltage difference of the third switch and the eighth switch are always equal, and are always equal to the gate-source voltage difference and drain-source voltage difference of the first switch, respectively. This ensures that the current flowing out of the third switch and the current flowing out of the eighth switch are always equal to the design value, ensuring the control accuracy of the clock signal, compensation signal, and temperature protection signal. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a structural block diagram of a highly integrated combinational control circuit in an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the highly integrated combinational control circuit in an embodiment of the present invention;

[0035] Figure 3 The waveforms of the clock signal, the voltage at point A, and the compensation signal are shown in the embodiment of the present invention. Detailed Implementation

[0036] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] This invention provides a highly integrated combined control circuit, such as... Figure 1 As shown, it includes: current circuit 10, capacitor circuit 20, clock signal circuit 30, compensation signal circuit 40 and temperature protection signal circuit 50;

[0041] The current circuit 10 provides operating current to the capacitor circuit 20, the clock signal circuit 30, and the temperature protection signal circuit 50. The capacitor circuit 20 is charged based on the operating current. When the charging voltage reaches a first voltage threshold, the clock signal circuit 30 outputs a high-level clock signal based on the first voltage threshold and the operating current, and controls the capacitor circuit 20 to discharge based on the high-level clock signal. When the discharge voltage reaches a second voltage threshold, the clock signal circuit 30 outputs a low-level clock signal based on the second voltage threshold and the operating current, and controls the capacitor circuit 20 to charge based on the low-level clock signal. After that, the clock signal circuit 30 cyclically outputs high-level clock signals and low-level clock signals.

[0042] The compensation signal circuit 40 is used to output a changing compensation signal based on the changes in the charging voltage and discharging voltage of the capacitor circuit 20; the temperature protection signal circuit 50 is used to generate a reference voltage based on the operating current, and generate different voltage signals when the temperature changes, and generate a temperature protection signal based on the reference voltage and the different voltage signals.

[0043] Wherein, the first terminal of the current circuit 10 is connected to the external power supply VIN, the second terminal is grounded, the third terminal is connected to the first terminal of the clock signal circuit 30, the fourth terminal is connected to the second terminal of the clock signal circuit 30, the first terminal of the capacitor circuit 20 and the first terminal of the compensation signal circuit 40, the fifth terminal is connected to the third terminal of the clock signal circuit 30, the sixth terminal is connected to the fourth terminal of the clock signal circuit 30 and the second terminal of the capacitor circuit 20, the seventh terminal is connected to the third terminal of the capacitor circuit 20, the eighth terminal is connected to the first terminal of the temperature protection signal circuit 50, and the ninth terminal is connected to the second terminal of the temperature protection signal circuit 50.

[0044] The fifth terminal of the clock signal circuit 30 is grounded, and its sixth terminal outputs a low-level clock signal or a high-level clock signal; the fourth terminal of the capacitor circuit 20 is grounded; the second terminal of the compensation signal circuit 40 is connected to an external power supply, its third terminal is grounded, and its fourth terminal outputs a compensation signal; the third terminal of the temperature protection signal circuit 50 is grounded, and its fourth terminal outputs a temperature protection signal.

[0045] Specifically, the current circuit 10 is connected to the capacitor circuit 20, the clock signal circuit 30, and the temperature protection signal circuit 50. After the external power supply is turned on, it can provide the current required for the operation of each circuit. The capacitor circuit 20 is equipped with components such as capacitors and can charge the capacitors based on the operating current provided by the current circuit 10. At the same time, the capacitor circuit 20 is connected to the clock signal circuit 30. When the capacitor is charged, the terminal voltage of the capacitor gradually increases. When the terminal voltage increases to a first voltage threshold, the clock signal circuit 30 will change its operating state based on the terminal voltage reaching the first voltage threshold and the operating current provided by the current circuit 10, and the output clock signal will change from a low-level clock signal to a high-level clock signal.

[0046] Furthermore, the clock signal circuit 30 is equipped with a feedback loop, meaning the output clock signal can be fed back into the clock signal circuit 30, causing its operating state to change again. This causes the capacitor to enter a discharging state, and the capacitor's terminal voltage continuously decreases. When the terminal voltage drops to a second voltage threshold, the clock signal circuit 30 changes its operating state again based on the terminal voltage reaching the second voltage threshold and the operating current provided by the current circuit 10, switching the output clock signal from a high-level clock signal to a low-level clock signal. This low-level clock signal then changes the operating state of the clock signal circuit 30 again through the feedback loop, causing the operating current output by the current circuit 10 to charge the capacitor. The capacitor's terminal voltage gradually increases, and when it reaches a first voltage threshold, the clock signal circuit 30 outputs a high-level clock signal again.

[0047] Therefore, once the circuit reaches a steady state, the terminal voltage of the capacitor in capacitor circuit 20 varies between a first voltage threshold and a second voltage threshold, and clock signal circuit 30 cyclically outputs high-level and low-level clock signals. Thus, clock signal circuit 30 outputs a square wave signal with periodic high-low level changes. When this combined control circuit is applied to a switching power supply control chip, this clock signal can adjust the switching frequency of the power switching transistor.

[0048] The compensation signal circuit 40 connects the current circuit 10 and the capacitor circuit 20. During the charging and discharging process of the capacitor circuit 20, a changing compensation signal is output based on the change in the voltage across the capacitor terminals. That is, the compensation signal changes with the terminal voltage; for example, the circuit can be configured to make the compensation signal and the terminal voltage linearly related. This compensation signal can be used in the power supply's feedback control loop to improve the stability of the power supply circuit.

[0049] The temperature protection signal circuit 50 includes a thermistor whose physical properties, such as voltage, change with temperature. This means it generates a changing voltage signal when the temperature changes. Simultaneously, the temperature protection signal circuit 50 can also generate a reference voltage based on the operating current provided by the current circuit 10, and then generate a changing temperature protection signal using the reference voltage and the changing voltage signal. For example, when the temperature is high, a first voltage signal is generated and a high-level temperature protection signal is output; when the temperature is normal, a second voltage signal is generated and a low-level temperature protection signal is output.

[0050] In this invention, a combined control circuit is formed by setting up a current circuit, a capacitor circuit, a clock signal circuit, a compensation signal circuit, and a temperature protection signal circuit in the circuit. That is, a clock signal, a compensation signal, and a temperature protection signal can be obtained by using a single control circuit, thereby reducing the area of ​​the switching power supply control chip and improving the integration of the switching power supply control chip.

[0051] In one alternative implementation, such as Figure 2 As shown, the current circuit includes a first switch M1, a second switch M2, a third switch M3, a fourth switch M4, a fifth switch M5, a sixth switch M6, a seventh switch M7, an eighth switch M8, and a first current source I1;

[0052] The first terminal of the first switch M1 is connected to the first terminals of the second switch M2, the third switch M3, the fourth switch M4, the fifth switch M5, the sixth switch M6, the seventh switch M7, the eighth switch M8, and an external power supply. The second terminal of the first switch M1 is connected to its third terminal, the second terminal of the second switch M2, the second terminal of the third switch M3, the second terminal of the fourth switch M4, the second terminal of the fifth switch M5, the second terminal of the sixth switch M6, the second terminal of the seventh switch M7, the second terminal of the eighth switch M8, and one terminal of the first current source I1.

[0053] The other end of the first current source I1 is grounded. The third end of the second switch M2 is connected to the first end of the clock signal circuit. The third end of the third switch M3 is connected to the second end of the clock signal circuit, the first end of the capacitor circuit, and the first end of the compensation signal circuit. The third end of the fourth switch M4 is connected to the third end of the clock signal circuit. The third end of the fifth switch M5 is connected to the fourth end of the clock signal circuit and the second end of the capacitor circuit. The third end of the sixth switch M6 is connected to the third end of the capacitor circuit. The third end of the seventh switch M7 is connected to the first end of the temperature protection signal circuit. The third end of the eighth switch M8 is connected to the second end of the temperature protection signal circuit.

[0054] Specifically, based on this circuit structure, after the circuit is powered on, current is generated in the first current source I1, and the first current source I1 pulls down the control terminal voltage of the first switch M1 to the eighth switch M8, and the first switch M1 to the eighth switch M8 are turned on. Thus, the current circuit provides working current for the capacitor circuit, the clock signal circuit and the temperature protection signal circuit.

[0055] In one alternative implementation, such as Figure 2 As shown, the clock signal circuit includes a thirteenth switch M13, a fourteenth switch M14, a fifteenth switch M15, a first inverter A1, a second inverter A2, a third inverter A3, a first NOR gate F1, and a second NOR gate F2.

[0056] The first terminal of the thirteenth switch M13 is connected to the third terminal of the current circuit and the first terminal of the fourteenth switch M14. The second terminal of the thirteenth switch M13 is grounded. The third terminal of the thirteenth switch M13 is connected to the input terminal of the third inverter A3, the output terminal of the first NOR gate F1, and the first input terminal of the second NOR gate F2. The second terminal of the fourteenth switch M14 is grounded. The third terminal of the fourteenth switch M14 is connected to the first terminal of the fifteenth switch M15, the fourth terminal of the current circuit, the first terminal of the capacitor circuit, and the first terminal of the compensation signal circuit. The fifteenth switch... The second terminal of transistor M15 is grounded. The third terminal of the fifteenth switching transistor M15 is connected to the input terminal of the first inverter A1 and the fifth terminal of the current circuit. The output terminal of the first inverter A1 is connected to the first input terminal of the first NOR gate F1. The second input terminal of the first NOR gate F1 is connected to the output terminal of the second NOR gate F2. The input terminal of the second inverter A2 is connected to the sixth terminal of the current circuit and the second terminal of the capacitor circuit. The output terminal of the second inverter A2 is connected to the second input terminal of the second NOR gate F2. The output terminal of the third inverter A3 outputs a low-level clock signal or a high-level clock signal.

[0057] The capacitor circuit includes a sixteenth switch M16, a seventeenth switch M17, a first capacitor C1, and a first resistor R1. The first terminal of the sixteenth switch M16 is connected to the sixth terminal of the current circuit and the fourth terminal of the clock signal circuit. The second terminal of the sixteenth switch M16 is connected to the first and second terminals of the seventeenth switch M17 and the seventh terminal of the current circuit. The third terminal of the sixteenth switch M16 is connected to one terminal of the first capacitor C1, the fourth terminal of the current circuit, the second terminal of the clock signal circuit, and the first terminal of the compensation signal circuit. The other terminal of the first capacitor C1 is connected to one terminal of the first resistor R1 and grounded. The other terminal of the first resistor R1 is connected to the third terminal of the seventeenth switch M17.

[0058] Specifically, after the switching transistors in the current circuit are turned on, the sixth switching transistor M6 pulls up the control terminal voltages of the sixteenth switching transistor M16 and the seventeenth switching transistor M17, turning on the sixteenth and seventeenth switching transistors M16 and M17. Current flows in both the branch composed of the fifth switching transistor M5, the sixteenth switching transistor M16, and the first capacitor C1, and the branch composed of the sixth switching transistor M6, the seventeenth switching transistor M17, and the first resistor R1. Since the first switching transistor M1 and the sixth switching transistor M6 form a current mirror structure, the current I3 flowing in the branch composed of the sixth switching transistor M6, the seventeenth switching transistor M17, and the first resistor R1 is proportional to the current output by the first current source I1. Preferably, the current I3 is equal to the current output by the first current source I1. Therefore, the terminal voltage of the first resistor R1 is a fixed value. The fixed value VR1 is preferably 100mV. Since the capacitor voltage does not change abruptly, when the circuit is first powered on, the voltage at point A is ground, which is less than the terminal voltage of the first resistor R1. At this time, the control terminal voltage of the fifteenth switch M15 is low, and the fifteenth switch M15 is turned off. The voltage at point B is pulled high by the fourth switch M4. Simultaneously, since the voltage at point A is less than the terminal voltage of the first resistor R1, the gate-source voltage difference of the sixteenth switch M16 is greater than the gate-source voltage difference of the seventeenth switch M17. The current flowing through the sixteenth switch M16 is greater than the current flowing through the seventeenth switch M17. Because the fifth switch M5 and the sixth switch M6 are current mirrors with a current coefficient of 1, the current flowing through the fifth switch M5 is equal to the current flowing through the seventeenth switch M17. Therefore, at this time, the current flowing through the sixteenth switch M16 is greater than the current flowing through the fifth switch M5, and the voltage at point C is pulled low.

[0059] Therefore, it can be seen that when the circuit is first powered on, point A is at a low level, point B is at a high level, and point C is at a low level. At this time, the first inverter A1 outputs a low level, the second inverter A2 outputs a high level, the second NOR gate F2 outputs a low level, and the first NOR gate F1 outputs a high level. Therefore, the first signal SO1 (i.e., the clock signal) output by the third inverter A3 is at a low level. At the same time, the high level output by the first NOR gate F1 is input into the thirteenth switch M13, and the thirteenth switch M13 is turned on, thereby pulling down the control terminal voltage of the fourteenth switch M14. The fourteenth switch M14 is turned off. At this time, the current flowing through the third switch M3 and the current flowing through the fifth switch M5 and the sixteenth switch M16 charge the first capacitor C1, and the voltage VA at point A gradually increases.

[0060] When the voltage VA at point A rises to greater than VR1, the current flowing through the sixteenth switch M16 is less than the current flowing through the fifth switch M5, and the voltage at point C is pulled high. At this time, the voltage at point A is less than the gate-source voltage difference VGS when the fifteenth switch M15 is working normally (it can be assumed that the gate-source voltage difference VGS when the switch is working normally is equal to the turn-on threshold voltage VTH15). Therefore, the fifteenth switch M15 is still in the off state, and point B is still at a high level. Since the first NOR gate F1 outputs a high level to the second NOR gate F2 in the previous circuit state, when the voltage at point C switches to a high level, the second inverter A2 outputs a low level, and the second NOR gate F2 still outputs a low level to the first NOR gate F1. Since the first inverter A1 still outputs a low level to the first NOR gate F1, the first NOR gate also still outputs a high level.

[0061] When the voltage at point A increases to a level greater than the gate-source voltage difference VGS when the fifteenth switch M15 is operating normally, the fifteenth switch M15 turns on, pulling the voltage at point B low. At this time, the first inverter A1 outputs a high level, and the first NOR gate F1 outputs a low level. Therefore, the first signal SO1 output by the third inverter A3 switches to a high level. Since the second inverter A2 output a low level in the previous circuit state, the output of the second NOR gate F2 switches to a high level at this time; simultaneously, the low-level output of the first NOR gate F1... After the input is to the thirteenth switch M13, the thirteenth switch M13 is turned off. The control terminal voltage of the fourteenth switch M14 is pulled high by the second switch M2, and the fourteenth switch M14 is turned on, thereby pulling the voltage at point A low. The fifteenth switch M15 is turned off again, and the voltage at point B switches back to a high level. However, since the output of the second NOR gate F2 has switched to a high level, the first NOR gate F1 still outputs a low level. At this time, the first capacitor C1 begins to discharge through the fourteenth switch M14, and the voltage VA at point A decreases.

[0062] When the voltage VA at point A drops below VR1, the voltage at point C switches to a low level. The output of the second inverter A2 is high, the output of the second NOR gate F2 switches to a low level, and the output of the first NOR gate F1 switches to a high level. Therefore, the first signal SO1 output by the third inverter A3 switches to a low level. At the same time, the thirteenth switch M13 turns on again, thereby pulling down the control terminal voltage of the fourteenth switch M14. The fourteenth switch M14 turns off. At this time, the first capacitor C1 is recharged, and the voltage VA at point A begins to rise again. The circuit enters the next cycle.

[0063] In one alternative implementation, such as Figure 2 As shown, the compensation signal circuit includes an eighteenth switch M18, a nineteenth switch M19, a twentieth switch M20, a twenty-first switch M21, a second resistor R2, and a third resistor R3. One end of the second resistor R2 is connected to the first terminal of the twentieth switch M20, the first terminal of the twenty-first switch M21, and an external power supply. The other end of the second resistor R2 is connected to the first terminal of the eighteenth switch M18 and the first terminal of the nineteenth switch M19. The second terminal of the eighteenth switch M18 is connected to the first terminal of the capacitor circuit, the fourth terminal of the current circuit, and the second terminal of the clock signal circuit. The third terminal of the eighteenth switch M18 is connected to one end of the third resistor R3 and grounded. The other end of the third resistor R3 is connected to the second terminal of the nineteenth switch M19. The third terminal of the nineteenth switch M19 is connected to the second and third terminals of the twentieth switch M20 and the second terminal of the twenty-first switch M21. The third terminal of the twenty-first switch M21 outputs a compensation signal.

[0064] Specifically, when the circuit is powered on, the voltage at the current input terminal of the eighteenth switch M18, i.e., the voltage VD at point D, is pulled high through the second resistor R2. The control terminal voltage of the eighteenth switch M18 is the voltage VA at point A. Since the voltage VA at point A is low, the eighteenth switch M18 is turned on, and current flows through the second resistor R2 and the eighteenth switch M18. The voltage VD at point D is then adjusted to VA + VGS. Since the voltage at the current output terminal of the nineteenth switch M19 is pulled low through the third resistor R3, the nineteenth switch M19 is turned on. The turned-on nineteenth switch M19 pulls down the control terminal voltages of the twentieth switch M20 and the twenty-first switch M21, causing the twentieth and twenty-first switches M20 and M21 to turn on. At this time, current flows through the third resistor R3, the nineteenth switch M19, and the twentieth switch M20. The terminal voltage VR3 is adjusted to VD-VGS. It should be noted that the fifteenth switch M15, the eighteenth switch M18, and the nineteenth switch M19 are all switches with the same conduction parameters. Therefore, the gate-source voltage difference after the fifteenth switch M15, the eighteenth switch M18, and the nineteenth switch M19 are the same, which is represented by VGS here. Therefore, at this time, the terminal voltage VR3 of the third resistor R3 can be obtained as VR3=VD-VGS=VA, and the current flowing through the third resistor R3 is VA / R3. Since the twentieth switch M20 and the twenty-first switch M21 form a current mirror structure, the second signal SO2 (i.e., the compensation signal) output from the twenty-first switch M21 is proportional to the current flowing through the third resistor R3. Preferably, the second signal SO2=VA / R3. Therefore, the second signal SO2 gradually changes with the change of the voltage VA at point A.

[0065] Based on the above analysis, it can be seen that after the circuit enters steady state, the voltage VA at point A is always within the range of VR1 (first voltage threshold) to VGS (second voltage threshold), while the magnitude of the second signal SO2 is always within the range of VR1 / R3 to VGS / R3. That is, the second signal SO2 gradually rises from VR1 / R3, and when the second signal SO2 rises to VGS / R3, the second signal SO2 quickly drops back to VR1 / R3, and then the cycle repeats.

[0066] The rise time of the voltage VA at point A from VR1 to VGS is equal to the rise time of the second signal SO2 from VR1 / R3 to VGS / R3, and this rise time is the same as the charging time of the first capacitor C1. Furthermore, as analyzed above, since the voltage at point A is always greater than the terminal voltage VR1 of the first resistor after the circuit enters steady state, point C remains at a high level. Therefore, the sixteenth switch M16 cannot flow charging current to the first capacitor C1. That is, when the circuit enters steady state, the charging current of the first capacitor C1... This refers to the current I4 flowing from the third switch M3 to the first capacitor C1. Since the first switch M1 and the third switch M3 form a current mirror, the current I4 flowing out of the third switch M3 is proportional to the current output by the first current source I1. Preferably, the current I4 is equal to the current output by the first current source I1. Therefore, after the circuit enters steady state, the charging current of the first capacitor = the current I4 = the current output by the first current source I1. At this time, according to the capacitance formula C×U=I×t, the charging time of the first capacitor C1 can be obtained. Therefore, the rise time of the voltage VA at point A from VR1 to VGS is equal to the rise time of the second signal S02 from VR1 / R3 to VGS / R3. .

[0067] From the above analysis, the waveforms of the first signal SO1, the voltage VA at point A, and the second signal SO2 can be obtained, as follows: Figure 3 As shown.

[0068] In an optional embodiment, the combined control circuit further includes a compensation signal output control circuit (not shown in the figure), which is turned off when a compensation signal needs to be output, and turned on and controls the nineteenth switch to be turned off when a compensation signal does not need to be output. Specifically, the compensation signal output control circuit is located at the control terminal of the nineteenth switch and can control the output of the compensation signal circuit by controlling the on / off state of the nineteenth switch. When the chip needs to output a compensation signal, the compensation signal output control circuit is turned off, which does not affect the normal operation of the nineteenth switch M19; when the chip does not need to output a compensation signal, the compensation signal output control circuit is turned on, thereby pulling down the control terminal voltage of the nineteenth switch M19, so that the nineteenth switch M19 is always in the off state. At this time, the second signal SO2 (i.e., the compensation signal) is 0. The compensation signal output control circuit can be a simple switching structure, for example, including a switching transistor. The source of the switching transistor is grounded, and the drain is connected to the control terminal of the nineteenth switching transistor. The gate receives the enable control signal. When a compensation signal needs to be output, the enable signal is low and the switching transistor is turned off. When a compensation signal does not need to be output, the enable signal is high and the switching transistor is turned on, pulling the voltage at the control terminal of the nineteenth switching transistor low, turning off the nineteenth switching transistor M19, and the second signal SO2 (i.e., the compensation signal) is 0.

[0069] In one optional implementation, when the temperature is below a first temperature threshold, the temperature protection signal circuit generates a first voltage signal and simultaneously operates in a first working state, generating a first reference voltage based on the operating current provided by the current circuit. The temperature protection signal circuit outputs a low-level temperature protection signal based on the first voltage signal and the first reference voltage. When the temperature is above the first temperature threshold, the temperature protection signal circuit generates a second voltage signal and outputs a high-level temperature protection signal based on the second voltage signal and the first reference voltage, thus entering a second working state where a second reference voltage is generated based on the operating current provided by the current circuit. When the temperature recovers to below the second temperature threshold, the temperature protection signal circuit generates a third voltage signal and outputs a low-level protection signal based on the third voltage signal and the second reference voltage, simultaneously re-entering the first working state where the first temperature threshold is greater than the second temperature threshold.

[0070] Specifically, if a transistor is used as a thermistor in the temperature protection signal circuit, when the temperature is normal (i.e., below the first temperature threshold), the voltage difference between the base and emitter of the transistor generates a relatively large voltage signal (this is the first voltage signal). Simultaneously, the temperature protection signal circuit is in its first operating state, generating a first reference voltage based on the operating current provided by the current circuit. Since the larger first voltage signal is greater than the first reference voltage, the temperature protection signal circuit generates a low-level temperature protection signal. When the temperature is higher (i.e., above the first temperature threshold), the voltage difference between the base and emitter of the transistor generates a relatively small voltage signal (this is the second voltage signal). This smaller second voltage signal is less than the first reference voltage, causing the temperature protection signal circuit to generate a high-level temperature protection signal and enter the second operating state. In the second operating state, the temperature protection signal circuit generates a second reference voltage based on the operating current provided by the current circuit. When the temperature recovers to below the second temperature threshold, causing the voltage difference between the base and emitter of the transistor to generate a third voltage signal greater than the second reference voltage, the temperature protection signal circuit re-enters the first operating state and generates a low-level temperature protection signal. In this case, the voltage difference between the base and emitter of the thermistor transistor has a negative temperature coefficient, therefore, the second voltage threshold is less than the first voltage threshold.

[0071] In one alternative implementation, such as Figure 2As shown, the temperature protection signal circuit includes a first triode Q1, a fourth resistor R4, a fifth resistor R5, a fourth inverter A4, and a twenty-second switch tube M22; a first end of the first triode Q1 is connected to an input end of the fourth inverter A4, a first end of the twenty-second switch tube M22, and an eighth end of the current circuit, a second end of the first triode Q1 is connected to one end of the fourth resistor R4 and a ninth end of the current circuit, a third end of the first triode Q1 is connected to one end of the fifth resistor R5, a second end of the twenty-second switch tube M22, and is grounded, the other end of the fourth resistor R4 is connected to the other end of the fifth resistor R5 and a third end of the twenty-second switch tube M22, and an output end of the fourth inverter A4 outputs a temperature protection signal.

[0072] Specifically, the current output by the first current source I1 in this embodiment is designed as a zero-temperature-drift current. Therefore, the current flowing out of the eighth switch tube M8 is a zero-temperature-drift current, denoted as current IO, and the current IO is proportional to the current output by the first current source I1. Preferably, the current IO is equal to the current output by the first current source I1. At the same time, the seventh switch tube M7 raises the control terminal voltage of the twenty-second switch tube M22, and the twenty-second switch tube M22 is turned on. Therefore, at this time, the base voltage of the first triode Q1 .

[0073] When the temperature is relatively low, the voltage difference VBE between the base and emitter of the first triode Q1 is relatively large. That is, at this time, VBE > VB_Q1. Therefore, the first triode Q1 is in the off state, the input end of the fourth inverter A4 is raised, and the third signal SO3 output by the fourth inverter A4 is at a low level, indicating that the chip temperature is in a normal state at this time.

[0074] When the temperature is relatively high, the voltage difference VBE between the base and emitter of the first triode Q1 is relatively small. That is, at this time, VBE < VB_Q1. Therefore, the first triode Q1 is turned on, the input end of the fourth inverter A4 is pulled low through the first triode Q1, and the third signal SO3 output by the fourth inverter A4 is switched to a high level, indicating that the chip temperature is in an abnormal state at this time. At the same time, the twenty-second switch tube M22 is turned off, and the base voltage VB_Q1 of the first triode Q1 increases to to ensure that the first triode Q1 is in the on state.

[0075] After that, when the chip temperature recovers to make the voltage difference VBE between the base and emitter of the first triode Q1 greater than , the first triode Q1 is turned off, the input end of the fourth inverter A4 is raised, and the third signal SO3 output by the fourth inverter A4 is switched back to a low level again.

[0076] As can be seen from the above analysis, when the third signal SO3 is at temperature T1, the switching point from low to high level, the voltage difference between the base and emitter of the first transistor Q1 is... When the third signal SO3 is at temperature T2, the switching point from high to low level, the voltage difference between the base and emitter of the first transistor Q1 is... Since the voltage difference VBE between the base and emitter of the first transistor Q1 has a negative temperature coefficient, it can be concluded that temperature T1 is greater than temperature T2. This ensures that the chip circuit can be restarted to start working only after the chip temperature has fully recovered to normal.

[0077] As can be seen from the above analysis, the third signal SO3 is the temperature protection signal.

[0078] In one alternative implementation, such as Figure 2 As shown, the temperature protection signal circuit also includes a second capacitor C2 and a third capacitor C3. The second capacitor C2 is connected in parallel across the fourth resistor R4, and the third capacitor C3 is connected in parallel across the fifth resistor R5. Specifically, by setting the second capacitor C2 and the third capacitor C3, the voltage across the fourth resistor R4 and the fifth resistor R5 can be regulated respectively.

[0079] In one alternative implementation, such as Figure 2 As shown, the current circuit further includes a ninth switch, a tenth switch M10, an eleventh switch M11, a twelfth switch M12, and a second current source I2. The first terminal of the ninth switch M9 is connected to the second terminal of the first switch M1. The second terminal of the ninth switch M9 is connected to the first and second terminals of the tenth switch M10, the first terminal of the eleventh switch M11, and the first terminal of the twelfth switch M12. The third terminal of the ninth switch M9 is connected to the third terminal of the first switch M1 and one terminal of the first current source I1. The tenth switch M10... The three terminals are connected to an external power supply. The second terminal of the tenth switch M10 is connected to its third terminal and one terminal of the second current source I2. The other terminal of the second current source I2 is grounded. The second terminal of the eleventh switch M11 is connected to the third terminal of the third switch M3. The third terminal of the eleventh switch M11 is connected to the second terminal of the clock signal circuit, the first terminal of the capacitor circuit, and the first terminal of the compensation signal circuit. The second terminal of the twelfth switch M12 is connected to the third terminal of the eighth switch. The third terminal of the twelfth switch M12 is connected to the second terminal of the temperature protection signal circuit.

[0080] Specifically, during circuit operation, the control terminal voltage of the fifteenth switch M15 and the base voltage of the first transistor Q1 both change. Simultaneously, the current flowing out of the third switch M3 charges the first capacitor C1, meaning the current flowing out of the third switch M3 is directly related to the rise time of the output signal. The current flowing out of the eighth switch M8 flows into a resistor, and the resistor's terminal voltage serves as the reference voltage for temperature protection, meaning the current flowing out of the eighth switch M8 is directly related to the temperature protection temperature. Therefore, this application connects the eleventh switch M11 in series in the third switch M3 branch and the twelfth switch M12 in series in the eighth switch M8 branch. The eleventh switch M11 isolates the influence of the control terminal voltage of the fifteenth switch M15 on the drain-source voltage difference of the third switch M3, and the twelfth switch M12 isolates the... The application describes the influence of the base voltage of transistor Q1 on the drain-source voltage difference of the eighth switch M8. Furthermore, this application connects a ninth switch M9 in series in the branch of the first switch M1, ensuring that the drain voltages of the first switch M1, the third switch M3, and the eighth switch M8 are all equal to the voltage at point E, VE + VGS1. Here, VGS1 is the gate-source voltage difference of the ninth switch M9, the eleventh switch M11, and the twelfth switch M12. Therefore, the gate-source voltage difference and drain-source voltage difference between the third switch M3 and the eighth switch M8 are always equal, and are always equal to the gate-source voltage difference and drain-source voltage difference of the first switch M1, respectively. This ensures that the current I4 flowing out of the third switch M3 and the current IO flowing out of the eighth switch M8 are always equal to the design value, thus ensuring the control accuracy of the first signal SO1, the second signal SO2, and the third signal SO3.

[0081] While exemplary embodiments and their advantages have been described in detail, those skilled in the art can make various changes, substitutions, and modifications to these embodiments without departing from the spirit of the invention and the scope of protection defined by the appended claims. Such modifications and variations all fall within the scope defined by the appended claims. For other examples, those skilled in the art should readily understand that the order of process steps can be changed while remaining within the scope of the invention.

[0082] Furthermore, the scope of this invention is not limited to the processes, mechanisms, manufacturing methods, material compositions, means, methods, and steps of the specific embodiments described in the specification. From the disclosure of this invention, those skilled in the art will readily understand that any existing or future processes, mechanisms, manufacturing methods, material compositions, means, methods, or steps that perform substantially the same function or obtain substantially the same results as the corresponding embodiments described in this invention can be applied according to this invention. Therefore, the appended claims are intended to include these processes, mechanisms, manufacturing methods, material compositions, means, methods, or steps within their scope of protection.

Claims

1. A highly integrated combinational control circuit, characterized in that, include: Current circuit, capacitor circuit, clock signal circuit, compensation signal circuit, and temperature protection signal circuit; The current circuit is used to provide operating current for the capacitor circuit, the clock signal circuit, and the temperature protection signal circuit. The capacitor circuit is used to charge based on the operating current. When the charging voltage reaches a first voltage threshold, the clock signal circuit outputs a high-level clock signal based on the first voltage threshold and the operating current, and controls the capacitor circuit to discharge based on the high-level clock signal. When the discharge voltage reaches a second voltage threshold, the clock signal circuit outputs a low-level clock signal based on the second voltage threshold and the operating current, and controls the capacitor circuit to charge based on the low-level clock signal. After that, the clock signal circuit cyclically outputs high-level clock signals and low-level clock signals. The compensation signal circuit is used to output a changing compensation signal based on the changes in the charging voltage and discharging voltage of the capacitor circuit. The temperature protection signal circuit is used to generate a reference voltage based on the operating current, and to generate different voltage signals when the temperature changes, and to generate a temperature protection signal based on the reference voltage and the different voltage signals. The current circuit includes a first switch transistor, a second switch transistor, a third switch transistor, a fourth switch transistor, a fifth switch transistor, a sixth switch transistor, a seventh switch transistor, an eighth switch transistor, and a first current source; The first terminal of the first switch is connected to the first terminals of the second switch, the third switch, the fourth switch, the fifth switch, the sixth switch, the seventh switch, the eighth switch, and an external power supply. The second terminal of the first switch is connected to its third terminal, the second terminal of the second switch, the second terminal of the third switch, the second terminal of the fourth switch, the second terminal of the fifth switch, the second terminal of the sixth switch, the second terminal of the seventh switch, the second terminal of the eighth switch, and one terminal of the first current source. The other end of the first current source is grounded. The third end of the second switch is connected to the first end of the clock signal circuit. The third end of the third switch is connected to the second end of the clock signal circuit, the first end of the capacitor circuit, and the first end of the compensation signal circuit. The third end of the fourth switch is connected to the third end of the clock signal circuit. The third end of the fifth switch is connected to the fourth end of the clock signal circuit and the second end of the capacitor circuit. The third end of the sixth switch is connected to the third end of the capacitor circuit. The third end of the seventh switch is connected to the first end of the temperature protection signal circuit. The third end of the eighth switch is connected to the second end of the temperature protection signal circuit.

2. The highly integrated combined control circuit according to claim 1, characterized in that: When the temperature is lower than the first temperature threshold, the temperature protection signal circuit generates a first voltage signal and is in a first working state. Based on the working current provided by the current circuit, a first reference voltage is generated. The temperature protection signal circuit outputs a low-level temperature protection signal based on the first voltage signal and the first reference voltage. When the temperature exceeds the first temperature threshold, the temperature protection signal circuit generates a second voltage signal. Based on the second voltage signal and the first reference voltage, the temperature protection signal circuit outputs a high-level temperature protection signal, and the temperature protection signal circuit enters a second working state, generating a second reference voltage based on the working current provided by the current circuit. When the temperature recovers to below the second temperature threshold, the temperature protection signal circuit generates a third voltage signal and outputs a low-level protection signal based on the third voltage signal and the second reference voltage. At the same time, the temperature protection signal circuit re-enters the first working state, where the first temperature threshold is greater than the second temperature threshold.

3. The highly integrated combined control circuit according to claim 1, characterized in that: The first terminal of the current circuit is connected to an external power supply, the second terminal is grounded, the third terminal is connected to the first terminal of the clock signal circuit, the fourth terminal is connected to the second terminal of the clock signal circuit, the first terminal of the capacitor circuit, and the first terminal of the compensation signal circuit, the fifth terminal is connected to the third terminal of the clock signal circuit, the sixth terminal is connected to the fourth terminal of the clock signal circuit and the second terminal of the capacitor circuit, the seventh terminal is connected to the third terminal of the capacitor circuit, the eighth terminal is connected to the first terminal of the temperature protection signal circuit, and the ninth terminal is connected to the second terminal of the temperature protection signal circuit. The fifth terminal of the clock signal circuit is grounded, and its sixth terminal outputs a low-level clock signal or a high-level clock signal. The fourth terminal of the capacitor circuit is grounded; The second terminal of the compensation signal circuit is connected to an external power supply, the third terminal is grounded, and the fourth terminal outputs a compensation signal. The third terminal of the temperature protection signal circuit is grounded, and its fourth terminal outputs a temperature protection signal.

4. The highly integrated combined control circuit according to claim 1, characterized in that, The current circuit also includes a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, and a second current source. The first terminal of the ninth switch is connected to the second terminal of the first switch. The second terminal of the ninth switch is connected to the first and second terminals of the tenth switch, the first terminal of the eleventh switch, and the first terminal of the twelfth switch. The third terminal of the ninth switch is connected to the third terminal of the first switch and one terminal of the first current source. The third terminal of the tenth switch is connected to an external power supply. The second terminal of the tenth switch is connected to its third terminal and one terminal of the second current source. The other terminal of the second current source is grounded. The second terminal of the eleventh switch is connected to the third terminal of the third switch. The third terminal of the eleventh switch is connected to the second terminal of the clock signal circuit, the first terminal of the capacitor circuit, and the first terminal of the compensation signal circuit. The second terminal of the twelfth switch is connected to the third terminal of the eighth switch. The third terminal of the twelfth switch is connected to the second terminal of the temperature protection signal circuit.

5. The highly integrated combined control circuit according to claim 1, characterized in that, The clock signal circuit includes a thirteenth switch, a fourteenth switch, a fifteenth switch, a first inverter, a second inverter, a third inverter, a first NOR gate, and a second NOR gate; The first terminal of the thirteenth switch is connected to the third terminal of the current circuit and the first terminal of the fourteenth switch. The second terminal of the thirteenth switch is grounded. The third terminal of the thirteenth switch is connected to the input terminal of the third inverter, the output terminal of the first NOR gate, and the first input terminal of the second NOR gate. The second terminal of the fourteenth switch is grounded. The third terminal of the fourteenth switch is connected to the first terminal of the fifteenth switch, the fourth terminal of the current circuit, the first terminal of the capacitor circuit, and the first terminal of the compensation signal circuit. The second terminal of the fifteenth switch is grounded. The third terminal of the fifteenth switch is connected to the input terminal of the first inverter and the fifth terminal of the current circuit. The output terminal of the first inverter is connected to the first input terminal of the first NOR gate. The second input terminal of the first NOR gate is connected to the output terminal of the second NOR gate. The input terminal of the second inverter is connected to the sixth terminal of the current circuit and the second terminal of the capacitor circuit. The output terminal of the second inverter is connected to the second input terminal of the second NOR gate. The output terminal of the third inverter outputs a low-level clock signal or a high-level clock signal.

6. The highly integrated combinational control circuit according to claim 5, characterized in that, The capacitor circuit includes a sixteenth switching transistor, a seventeenth switching transistor, a first capacitor, and a first resistor; The first terminal of the sixteenth switch is connected to the sixth terminal of the current circuit and the fourth terminal of the clock signal circuit. The second terminal of the sixteenth switch is connected to the first and second terminals of the seventeenth switch and the seventh terminal of the current circuit. The third terminal of the sixteenth switch is connected to one end of the first capacitor, the fourth terminal of the current circuit, the second terminal of the clock signal circuit, and the first terminal of the compensation signal circuit. The other end of the first capacitor is connected to one end of the first resistor and grounded. The other end of the first resistor is connected to the third terminal of the seventeenth switch.

7. The highly integrated combined control circuit according to claim 1, characterized in that, The compensation signal circuit includes an eighteenth switch, a nineteenth switch, a twentieth switch, a twenty-first switch, a second resistor, and a third resistor; One end of the second resistor is connected to the first terminal of the twentieth switch, the first terminal of the twentieth eleventh switch, and an external power supply. The other end of the second resistor is connected to the first terminal of the eighteenth switch and the first terminal of the nineteenth switch. The second terminal of the eighteenth switch is connected to the first terminal of the capacitor circuit, the fourth terminal of the current circuit, and the second terminal of the clock signal circuit. The third terminal of the eighteenth switch is connected to one end of the third resistor and grounded. The other end of the third resistor is connected to the second terminal of the nineteenth switch. The third terminal of the nineteenth switch is connected to the second and third terminals of the twentieth switch and the second terminal of the twentieth eleventh switch. The third terminal of the twentieth eleventh switch outputs a compensation signal.

8. The highly integrated combined control circuit according to claim 2, characterized in that, The temperature protection signal circuit includes a first transistor, a fourth resistor, a fifth resistor, a fourth inverter, and a twenty-second switching transistor. The first terminal of the first transistor is connected to the input terminal of the fourth inverter, the first terminal of the twenty-second switch, and the eighth terminal of the current circuit. The second terminal of the first transistor is connected to one terminal of the fourth resistor and the ninth terminal of the current circuit. The third terminal of the first transistor is connected to one terminal of the fifth resistor, the second terminal of the twenty-second switch, and grounded. The other terminal of the fourth resistor is connected to the other terminal of the fifth resistor and the third terminal of the twenty-second switch. The output terminal of the fourth inverter outputs a temperature protection signal.

9. The highly integrated combined control circuit according to claim 8, characterized in that, The temperature protection signal circuit also includes a second capacitor and a third capacitor. The second capacitor is connected in parallel across the fourth resistor, and the third capacitor is connected in parallel across the fifth resistor.

10. The highly integrated combinational control circuit according to claim 7, characterized in that, The combined control circuit further includes: The compensation signal output control circuit is used to be in the off state when a compensation signal needs to be output, and to be turned on and control the nineteenth switch to be in the off state when a compensation signal does not need to be output.

11. The highly integrated combinational control circuit according to claim 6, characterized in that, The first voltage threshold is the gate-source voltage difference when the fifteenth switch is working, and the second voltage threshold is the terminal voltage of the first resistor. When the combined control circuit enters a steady state, the terminal voltage of the first capacitor varies between the first voltage threshold and the second voltage threshold.

12. The highly integrated combined control circuit according to claim 8, characterized in that, The first reference voltage is expressed by the following formula: The second reference voltage is expressed by the following formula: In the formula, This indicates that the current circuit provides the operating current for the temperature protection signal circuit. This indicates the resistance value of the fourth resistor. This indicates the resistance value of the fifth resistor.

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