Voltage regulation circuit, switch control circuit and electronic equipment

Abstract

The embodiment of the invention provides a voltage regulation circuit, a switch control circuit and electronic equipment, and relates to the field of power supply driving circuits. The main circuit generates a first working voltage and a first power supply voltage based on an input voltage of a 12V or 24V DC voltage. The first signal control chip adjusts the voltage at the two ends of the first feedback unit according to the first power supply voltage; the first feedback unit detects voltage at two ends of the first feedback unit and feeds back the voltage to the first receiving unit; the voltage regulating potentiometer control chip is connected with the first node; the second signal control chip adjusts the voltage of the first node to the target voltage according to the first voltage and the first working voltage received by the first receiving unit under the control of the potentiometer control chip; the first node is connected with one end of the first resistor, the other end of the first resistor is connected with the second signal control chip and one end of the second resistor, and the other end of the second resistor is grounded; therefore, the stability of the circuit is improved, and the dimming is smooth without oscillation.

Description

Technical Field

[0001] The present invention relates to the field of power supply drive circuits, and in particular to a voltage regulating circuit, a switch control circuit and electronic equipment. Background Art

[0002] In current switch control circuits, a large number of electronic components are usually used for switch control, which has poor intelligence. In addition, due to the large number of electronic components in the design, the circuit is prone to oscillation, resulting in the inability to perform accurate switch control based on the switch control circuit, affecting the stability of the entire circuit operation, and even worse, may cause damage to the load equipment. In addition, when a circuit fails, it is difficult to locate the failed electronic component, which has poor practicality.

[0003] In a switch control circuit, the accuracy of the circuit control is usually related to the accuracy of its operating voltage. Therefore, it is necessary to improve the current voltage regulation circuit and further update the switch control circuit to avoid damage to the load device. Summary of the invention

[0004] The embodiments of the present application provide a voltage regulation circuit, a switch control circuit and an electronic device to solve the problems in the related art that the voltage regulation accuracy is low, and due to the large number of circuit elements, the circuit is prone to oscillation and instability, and it is difficult to accurately locate the fault.

[0005] Correspondingly, the embodiment of the present application also provides a switch control circuit and an electronic device to ensure the implementation and application of the above-mentioned voltage regulation circuit.

[0006] On the one hand, an embodiment of the present application provides a voltage regulation circuit, including: A main circuit, used for performing a voltage conversion operation on an input voltage to generate a first working voltage and a first power supply voltage; the input voltage is a 12V or 24V DC voltage; A first signal control chip, used for adjusting the voltage across the first feedback unit according to the first power supply voltage; The first feedback unit is used to detect the voltage across the first feedback unit and feed back the detected first voltage to the first receiving unit; A voltage regulating potentiometer control chip, used for connecting to the first node; a second signal control chip, configured to adjust the voltage of the first node to a target voltage under the control of the adjusting potentiometer control chip according to the first voltage received by the first receiving unit and the first working voltage; the target voltage is less than or equal to 11V; The first node is connected to one end of a first resistor, the other end of the first resistor is connected to the second signal control chip and one end of a second resistor, and the other end of the second resistor is grounded.

[0007] On the other hand, an embodiment of the present application provides a switch control circuit, characterized in that the circuit includes a connection terminal, a load terminal, a voltage regulator diode and a tenth resistor: One end of the connection terminal is connected to the first node in the voltage regulating circuit, and the other end is grounded; Two ends of the connection terminal are connected to two ends of the load and two ends of the Zener diode, the anode of the Zener diode is grounded, the cathode of the Zener diode is connected to the tenth resistor, and the other end of the tenth resistor is connected to the first working voltage.

[0008] On the other hand, an embodiment of the present application provides an electronic device, which serves as the above-mentioned load, is connected to both ends of the connecting terminal, and works under the switch control circuit.

[0009] In an embodiment of the present application, a voltage conversion operation is performed on an input voltage through a main circuit to obtain a first working voltage and a first power supply voltage; under the action of the first power supply voltage, a first signal control chip is used to adjust the voltage of a feedback unit, and the voltage of the feedback unit is fed back to a receiving unit, so as to realize 1:1 linear transmission and oscillation-free transmission in the voltage feedback process; under the action of the first working voltage, a second signal control chip is used to adjust the output current of an output node (i.e., a first node), and under the voltage limiting action of a first resistor and a second resistor, the voltage of the output node is made to be a target voltage; in this way, under the action of an input voltage of 12V or 24V DV (direct current voltage), an MCU (Micro Controller Unit) is used for adjustment to obtain a target voltage, and the dimming is smooth and oscillation-free, so that voltage regulation is achieved with fewer components, thereby improving circuit stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 One of the schematic diagrams of the voltage regulation circuit provided in the embodiment of the present application is shown; Figure 2 A second schematic diagram of a voltage regulation circuit provided in an embodiment of the present application is shown; Figure 3 A third schematic diagram of a voltage regulation circuit provided in an embodiment of the present application is shown; Figure 4A fourth schematic diagram of a voltage regulation circuit provided in an embodiment of the present application is shown; Figure 5 The switch control circuit provided by the embodiment of the present application is shown. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0013] like Figure 1 As shown, the embodiment of the present application provides a voltage regulation circuit, including a main circuit 1, a first signal control chip U11, a first feedback unit U12A, a first receiving unit U12B, a second signal control chip U10 and a first node. The main circuit 1 is used to perform a voltage conversion operation on an input voltage to generate a first working voltage and a first power supply voltage; the input voltage is a 12V or 24V DC voltage; A first signal control chip U11, used to adjust the voltage across the first feedback unit U12A according to the first power supply voltage; The first feedback unit U12A is used to detect the voltage across the first feedback unit U12A and feed back the detected first voltage to the first receiving unit U12B; A voltage regulating potentiometer control chip, used for connecting to the first node; The second signal control chip U10 is used to adjust the voltage of the first node to a target voltage under the control of the adjusting potentiometer control chip according to the first voltage received by the first receiving unit U12B and the first working voltage; the target voltage is less than or equal to 11V; The first node is connected to one end of the first resistor R30, the other end of the first resistor R30 is connected to the second signal control chip U10 and one end of the second resistor R10, and the other end of the second resistor R10 is grounded.

[0014] Optionally, the main circuit 1 and the first signal control chip U11 and the second signal control chip U10 may be connected in a wired or wireless manner, which is not limited in the embodiment of the present application.

[0015] In some embodiments, network tags may be respectively set in the main circuit 1 , the circuit where the first signal control chip U11 is located, and the circuit where the second signal control chip U10 is located, and voltage output and input may be performed by interconnecting the network tags.

[0016] Optionally, the first power supply voltage may be 12V VCC, and the first operating voltage may be 12V.

[0017] Alternatively, see Figure 2 The main circuit 1 can access the input voltage through the network label A1, output the first power supply voltage (12V VCC) through the network label A2, and output the first working voltage (12V) through the network label A4; the first signal control chip U11 can access the first power supply voltage through the network label A3; the second signal control chip U10 can access the first working voltage through the network label A5, connect to the first node through the network label A9, and output the target voltage.

[0018] In order to make the first signal control chip U11 work more stably, see Figure 3 , the second power management chip U13 can also be connected between the network label A3 and the first signal control chip U11, the voltage input terminal VIN of the second power management chip U13 (pin 3 of the second power management chip U13) is connected to the first power supply voltage through the network label A3, and the voltage output terminal VOUT of the second power management chip U13 (pin 1 of the second power management chip U13) is connected to the first signal control chip U11, and the output voltage after the second power management chip U13 performs a voltage conversion operation on the first power supply voltage is sent to the first signal control chip U11, so that the first signal control chip U11 works under the output voltage. Among them, the filter capacitor C14 can also be connected between the voltage output terminal VOUT of the second power management chip U13 and the ground terminal GND of the second power management chip U13 (pin 2 of the second power management chip U13), so that the voltage outputted by the voltage output terminal VOUT of the second power management chip U13 is more stable.

[0019] In order to make the second signal control chip U10 work more stably, the working mode can be similar to that of the first signal control chip U11. Figure 4, connect the third power management chip U6 between the network label A5 and the second signal control chip U10. Specifically, the voltage input terminal VIN (pin 3 of the third power management chip U6) of the third power management chip U6 is connected to the first working voltage through the network label A5, and is connected to the second signal control chip U10 through the voltage output terminal VOUT (pin 1 of the third power management chip U6) of the third power management chip U6, and the output voltage after the third power management chip U6 performs a voltage conversion operation on the first working voltage is sent to the second signal control chip U10, so that the second signal control chip U10 works at the output voltage. Among them, a filter capacitor C19 can also be connected between the voltage output terminal VOUT of the third power management chip U6 and the ground terminal GND (pin 2 of the third power management chip U6) of the third power management chip U6, so that the voltage outputted by the voltage output terminal VOUT of the third power management chip U6 is more stable.

[0020] Optionally, the first feedback unit U12A and the first receiving unit U12B can be implemented based on the principle of photoelectric coupling. For example, the first feedback unit U12A and the first receiving unit U12B can be a group of photoelectric coupling elements (hereinafter referred to as "photocoupler elements"), the first feedback unit U12A can be the light source of the first photocoupler element, and the first receiving unit U12B can be the light receiver of the first photocoupler element; in this way, the first feedback unit U12A can convert the first voltage at both ends thereof into a first optical signal, and after the first receiving unit U12B receives the first optical signal, it converts the first optical signal into a first voltage to achieve 1:1 transmission, thereby avoiding the direct use of multiple electronic components for signal transmission, which may cause circuit oscillation problems.

[0021] Optionally, the first signal control chip U11 may be an 8-pin integrated circuit chip, wherein the eight pins are respectively VDD (voltage for digital circuitry, digital power supply voltage) pin (pin 1), clk (clock, clock) pin (pin 2), PC3 pin (pin 3), PC2 pin (pin 4), PC1 pin (pin 5), vref (voltage reference, reference voltage) pin (pin 6), cs (Current Sense, current detection, current sampling or current feedback) (pin 7) and gnd (ground, ground) pin (pin 8). Among them, the "VDD pin of the first signal control chip U11" may also be referred to as the "input pin of the first signal control chip U11", and the "PC1 pin of the first signal control chip U11" may also be referred to as the "output pin of the first signal control chip U11".

[0022] Optionally, the second signal control chip U10 may have the same structure as the first signal control chip U11, that is, the second signal control chip U10 may also be an 8-pin integrated circuit chip, and the meaning of each pin is the same as the meaning of each pin of the first signal control chip U11. Among them, the "PC2 pin of the second signal control chip U10" may also be referred to as the "first output pin of the second signal control chip U10", and the "PC1 pin of the second signal control chip U10" may also be referred to as the "second output pin of the second signal control chip U10".

[0023] Alternatively, see Figure 4 , the first node may be the node where the network label A9 is located.

[0024] See also Figure 4 , the other end of the first resistor R30 can be connected to the second output pin (PC1 pin connected) of the second signal control chip U10 and one end of the second resistor R10, and the other end of the second resistor R10 is grounded. In this way, the target voltage can be obtained by dividing the output voltage of the second output pin of the second signal control chip U10 according to the resistance value of the first resistor R30 and the resistance value of the second resistor R10, and the current flowing through the first resistor R30 and the second resistor R10.

[0025] See also Figure 5 , the connection terminal CON1 can be implemented by a 4-pin connector, wherein pin 1 and pin 2 of the connection terminal CON1 are connected as one end of the connection terminal CON1, and pin 3 and pin 4 of the connection terminal CON1 are connected as one end of the connection terminal CON1. ​​Among them, one end formed by the connection of pin 3 and pin 4 of the connection terminal CON1 can be connected to the first node through the network label A8.

[0026] Optionally, the connection terminal CON1 can also be externally connected to a voltage regulating potentiometer control chip, which is indirectly connected to the network tag corresponding to the first node through the network tag A8 connected to the connection terminal CON1 to perform voltage limiting and indirectly adjust the target voltage of the first node.

[0027] In the above embodiment, the first resistor R30, the second resistor R10 and the voltage regulating potentiometer control chip externally connected to the connection terminal CON1 can all play a role in voltage limiting. By adjusting the voltage output by the second output pin of the second signal control chip U10 under the voltage limiting effect of the voltage regulating potentiometer control chip externally connected to the connection terminal CON1, the current flowing through the first resistor R30 and the second resistor R10 can be changed, so that based on the current and the resistance value of the first resistor R30 and the resistance value of the second resistor R10, a target voltage less than 11V (for example, 0-10V) can be obtained.

[0028] In an embodiment of the present application, a voltage conversion operation is performed on an input voltage through a main circuit to obtain a first working voltage and a first power supply voltage; under the action of the first power supply voltage, a first signal control chip is used to adjust the voltage of a feedback unit, and the voltage of the feedback unit is fed back to a receiving unit, so as to realize 1:1 linear transmission and oscillation-free transmission in the voltage feedback process; under the action of the first working voltage, a second signal control chip is used to adjust the output current of an output node (i.e., a first node), and under the voltage limiting action of a first resistor, a second resistor, and a voltage regulating potentiometer control chip, the voltage of the output node is made to be a target voltage; in this way, under the action of an input voltage of 12V or 24V DV (direct current voltage), an MCU is used for adjustment to obtain a target voltage (for example, a target voltage less than 11V, specifically 0-10V), and the dimming is smooth and oscillation-free, so that voltage regulation is achieved with fewer components, circuit stability is improved, and constant voltage output of the target voltage is achieved.

[0029] In some embodiments, the first feedback unit U12A is a light source of a first optical coupling element, and the first receiving unit U12B is a light receiver of the first optical coupling element; The first feedback unit U12A is used for transmitting the first optical signal to the first receiving unit U12B by converting the first voltage into a first optical signal; The first receiving unit U12B is used to receive the first optical signal and convert the first optical signal into the first voltage.

[0030] In this embodiment, the first feedback unit U12A and the first receiving unit U12B can be implemented based on the principle of photoelectric coupling. The first feedback unit U12A can convert the first voltage at its two ends into a first optical signal. After receiving the first optical signal, the first receiving unit U12B converts the first optical signal into a first voltage to achieve 1:1 transmission. It can be used either actively or passively, avoiding the direct use of multiple electronic components for signal transmission, which may cause circuit oscillation problems.

[0031] In some embodiments, the voltage regulating circuit further includes a third resistor R9, a fourth resistor R31 and a fifth resistor R25. See also Figure 3 , one end of the first feedback unit U12A is connected to the input pin of the first signal control chip U11, the other end of the first feedback unit U12A is connected to one end of the third resistor R9 and one end of the fourth resistor R31, the other end of the third resistor R9 is grounded, and the other end of the fourth resistor R31 is connected to the output pin of the first signal control chip U11; the first voltage is obtained by dividing the input voltage of the first signal control chip U11 according to the resistance value of the third resistor R9 and the resistance value of the fourth resistor R31; See also Figure 4 , one end of the first receiving unit U12B is connected to the first output pin of the second signal control chip U10 through the fifth resistor R25, and the other end of the first receiving unit U12B is grounded; the output voltage of the first output pin of the second signal control chip U10 is obtained by the voltage across the fifth resistor R25 and the first voltage; See also Figure 4 The other end of the first resistor R30 and the second output pin of the second signal control chip U10 are connected to one end of the second resistor R10; the target voltage is obtained by dividing the output voltage of the second output pin of the second signal control chip U10 according to the resistance value of the first resistor R30 and the resistance value of the second resistor R10.

[0032] Optionally, the third resistor R9, the fourth resistor R31 and the fifth resistor R25 may play a voltage limiting role.

[0033] Among them, by adjusting the voltage output by the output pin of the first signal control chip U11, the current flowing through the fourth resistor R31 can be changed, so that based on the current and the resistance value of the fourth resistor R31 and the resistance value of the third resistor R9, the voltage of the connection node of the first feedback unit U12A, the third resistor R9 and the fourth resistor R31 can be changed, and then based on the voltage output by the voltage output terminal VOUT of the second power management chip U13 and the voltage of the connection node, the first voltage across the first feedback unit U12A is obtained.

[0034] Optionally, after the first receiving unit U12B converts the received first optical signal into a first voltage, the second signal control chip U10 can obtain the output voltage of the first output pin of the second signal control chip U10 according to the sum of the voltage across the fifth resistor R25 and the first voltage, and then process the output voltage and the input voltage of the second signal control chip U10 (i.e., the first operating voltage) to adjust the target voltage.

[0035] In this embodiment, based on the voltage limiting role played by the first resistor R30, the second resistor R10, the third resistor R9, the fourth resistor R31 and the fifth resistor R25 in the voltage regulation circuit, and based on the voltage limiting role played by the external voltage regulating potentiometer connected to the connection terminal CON1 in the voltage regulation circuit, the first voltage and the target voltage can be adjusted to obtain a target voltage of 0-10V.

[0036] In some embodiments, see Figure 2, the main circuit 1 includes a first power management chip U8, a third signal control chip U5, a transformer T1, a second feedback unit U7B, a second receiving unit U7A, a sixth resistor R26 and a seventh resistor R28, the first power management chip U8 and the third signal control chip U5 are located on one side of the transformer T1, and the second feedback unit U7B is located on the other side of the transformer T1; wherein, The first power management chip U8 is used to perform a voltage conversion process on the input voltage to obtain the first power supply voltage; The second feedback unit U7B is used to detect the voltage across the second feedback unit U7B based on the voltage at the output end of the transformer T1, and feed back the detected second voltage to the second receiving unit U7A; The third signal control chip U5 is used to adjust the voltage of the input end of the transformer T1 according to the first power supply voltage and the second voltage received by the second receiving unit U7A, so that after being adjusted by the transformer T1, the voltage of the second node is the first working voltage; The transformer T1 is used to perform voltage conversion processing on the voltage at the input end of the transformer T1 to obtain the voltage at the input end of the transformer T1; One end of the sixth resistor R26 , the first output pin of the output end of the transformer T1 , and one end of the seventh resistor R28 are connected to form the second node.

[0037] Referring to the above introduction to the second power management chip U13 and the third power management chip U6, the first power management chip U8 can perform voltage conversion processing on the input voltage to obtain the first power supply voltage. Among them, the voltage input terminal VIN of the first power management chip U8 (pin 3 of the first power management chip U8) is connected to the input voltage through the network label A1, and the first power supply voltage is output through the voltage output terminal VOUT of the first power management chip U8 (pin 1 of the first power management chip U8), which can be specifically connected through the network label A2. Figure 3 The circuit shown provides a power supply voltage. A filter capacitor C7 may be connected between the voltage output terminal VOUT of the first power management chip U8 and the ground terminal GND (pin 2 of the first power management chip U8) of the first power management chip U8, so that the voltage outputted by the voltage output terminal VOUT of the first power management chip U8 is more stable.

[0038] In some embodiments, the second feedback unit U7B is a light source of the second optical coupling element, and the second receiving unit U7A is a light receiver of the second optical coupling element; The second feedback unit U7B is used for transmitting the second optical signal to the second receiving unit U7A by converting the second voltage into a second optical signal; The second receiving unit U7A is used to receive the second optical signal and convert the second optical signal into the second voltage.

[0039] Referring to the above description of the first feedback unit U12A and the first receiving unit U12B, the second feedback unit U7B and the second receiving unit U7A can also be implemented based on the principle of photoelectric coupling. The second feedback unit U7B and the second receiving unit U7A can be a group of optocoupler elements, the second feedback unit U7B can be the light source of the first optocoupler element, and the second receiving unit U7A can be the light receiver of the first optocoupler element; in this way, the second feedback unit U7B can convert the second voltage at both ends thereof into a second optical signal, and after the second receiving unit U7A receives the second optical signal, it converts the second optical signal into a second voltage to realize 1:1 transmission, thereby avoiding the direct use of multiple electronic components for signal transmission, which may cause circuit oscillation problems.

[0040] In some embodiments, the rated voltage of the transformer T1 may be 100V, and the withstand voltage value (ie, the withstanding voltage) of the transformer T1 may be 1.1 to 1.3 times of the rated voltage, so that the entire voltage regulation circuit may achieve a withstand voltage of 1 kilovolt (kV).

[0041] Optionally, the third signal control chip U5 adjusts the voltage at the input end of the transformer T1 according to the first power supply voltage and the second voltage received by the second receiving unit U7A, so that after being adjusted by the transformer T1, the voltage of the second node is the first working voltage. In this way, Figure 4 The circuit shown is able to operate stably so as to regulate the target voltage.

[0042] Alternatively, see Figure 2 The third signal control chip U5 can be an 8-pin integrated circuit chip, and the eight pins are comp (compensation) pin (pin 1), FB (feedback) pin (pin 2), CS pin (pin 3), Rect (reset) pin (pin 4), gnd pin (pin 5), GATE (gate) pin (pin 6), vcc (voltage at the common collector, positive power supply) pin (pin 7) and vref pin (pin 8).

[0043] Among them, the vcc pin of the third signal control chip U5 is connected to the output end of the first power management chip U8 and is connected to the first power supply voltage, and the FB pin and the gnd pin are both grounded.

[0044] The comp pin of the third signal control chip U5 is connected to one end of the second receiving unit U7A and one end of the capacitor C12. The other end of the second receiving unit U7A is grounded. The other end of the capacitor C12 is connected in series with the resistor R23. The other end of the resistor R23 is grounded. In this way, the voltage fed back from the second receiving unit U7A to the third signal control chip U5 can be made more stable through the series-connected capacitor C12 and resistor R23.

[0045] The Rect pin of the third signal control chip U5 is grounded through the filter capacitor C10, the vref pin is connected to the Rect pin through the resistor R22, and the vref pin is also grounded through the filter capacitor C11; in this way, under the action of the filter capacitor C10, the resistor R22 and the filter capacitor C11, the third signal control chip U5 can work more stably.

[0046] The CS pin of the third signal control chip U5 is grounded through the capacitor C9, the GATE pin of the third signal control chip U5 is connected to one end of the resistor R20, the other end of the resistor R20 is connected to the gate of the switch tube Q2 and one end of the resistor R19, the drain of the switch tube Q2 is connected to the source through the capacitor C17, the source of the switch tube Q2, one end of the capacitor C17, the positive electrode of the diode D4 is connected to the first input pin (i.e., pin 3) of the transformer T1, the gate of the switch tube Q2 is connected to the drain through the resistor R19, the drain of the switch tube Q2, the other end of the capacitor C17, the other end of the resistor R19, one end of the resistor R17, and the other end of the resistor R18 are connected; the other end of the capacitor C11 is grounded; the other end of the resistor R17 is grounded, and the other end of the capacitor C9 is grounded; in this way, the third signal control chip U5 can work more stably by limiting the current and feedback through the resistors R17, R18, and R19. The voltage at the input end of the transformer T1 is controlled by opening and closing the switch tube Q2.

[0047] Alternatively, see Figure 2 , a second node formed by connecting one end of the sixth resistor R26, the first output pin in the output end of the transformer T1 and one end of the seventh resistor R28 can be connected to the network label A4. In this way, when the network label A4 and the network label A5 are connected to each other, it can be Figure 4 The circuit shown provides the operating voltage.

[0048] In the above embodiment, the first power management chip U8 and the third signal control chip U5 are located on one side of the transformer T1, and the second feedback unit U7B is located on the other side of the transformer T1. The transformer T1 can be used to isolate the input and output ends of the transformer, thereby providing isolation protection for the entire voltage regulation circuit and achieving a withstand voltage of 1kV.

[0049] In some embodiments, see Figure 2 The main circuit 1 further includes a capacitor C16, a PIN switch diode U9, an eighth resistor R29 and a ninth resistor R27, The other end of the sixth resistor R26 is connected to one end of the second feedback unit U7B. The other end of the second feedback unit U7B and the second pin of the PIN switch diode U9 are connected to one end of the capacitor C16. The first pin of the PIN switch diode U9 is connected to the other end of the seventh resistor R28, one end of the eighth resistor R29, and one end of the ninth resistor R27, and the other end of the capacitor C16 is connected to the other end of the ninth resistor R27; the third pin of the PIN switch diode U9 and the other end of the eighth resistor R29 are grounded.

[0050] In some embodiments, the resistance of the seventh resistor R28 is 39.2kΩ, the resistance of the eighth resistor R29 is 10kΩ, and the reference voltage of the PIN switch diode U9 is 0.25V, the first power supply voltage is less than or equal to 12V, and the first operating voltage is 12V.

[0051] Optionally, the sixth resistor R26, the seventh resistor R28, the eighth resistor R29 and the ninth resistor R27 can play a voltage limiting role. The second voltage across the second feedback unit U7B can be adjusted through the voltage dividing effect of the sixth resistor R26.

[0052] Optionally, the voltage at the output end of the transformer T1 is adjusted, and after the output voltage is output, the PIN switch diode U9 can operate at its reference voltage.

[0053] When the PIN switch diode U9 operates at its reference voltage, the reference voltage of the PIN switch diode U9 is 0.25V, the resistance of the seventh resistor R28 is 39.2kΩ, the resistance of the eighth resistor R29 is 10kΩ, and the voltage at the node between the first pin (i.e., pin 1) of the PIN switch diode U9 and one end of the eighth resistor R29 is 2.5V. Since the other end of the eighth resistor R29 is grounded, the voltage across the eighth resistor R29 is 2.5V, and the current flowing through the eighth resistor R29 is 2.5V÷10KΩ=0.25mA. The total resistance of the seventh resistor R28 and the eighth resistor R29 is: 39.2KΩ+10KΩ=49.2 KΩ, then the first operating voltage of the second node (i.e., the connection node of the network label A4) is: 0.25 mA×49.2Ω=12.3V.

[0054] In some embodiments, in order to make the circuit where the sixth resistor R26, the second feedback unit U7B, the capacitor C16, the PIN switch diode U9, the eighth resistor R29 and the ninth resistor R27 are located (hereinafter referred to as the "first circuit") more stable, an electrolytic capacitor C15 can also be connected between the output ends of the transformer T1, and a Y capacitor CY1 is connected to the second output pin of the output end of the transformer T1 and the other end of the electrolytic capacitor C15, and the other end of the Y capacitor is grounded. In this way, energy storage filtering can be performed under the action of charging and discharging of the electrolytic capacitor C15, and the first circuit can be made more stable under the filtering action of the Y capacitor CY1.

[0055] In some embodiments, the first input pin and the second input pin of the transformer T1 are connected via a voltage stabilizing module and a rectifier diode D4 connected in series, serving as the input end of the transformer T1; the input end of the rectifier diode D4 is connected to the third signal control chip U5, and the output end of the rectifier diode D4 is connected to the voltage stabilizing module; The first output pin and the second output pin of the transformer T1 are connected via an electrolytic capacitor C15 to serve as the output end of the transformer T1.

[0056] See also Figure 2 , the first input pin of the transformer T1 is pin 1 of the transformer T1, the second input pin of the transformer T1 is pin 3 of the transformer T1, the first output pin of the transformer T1 is pin 6 of the transformer T1, and the second input pin of the transformer T1 is pin 4 of the transformer T1.

[0057] Optionally, the voltage stabilizing module can be implemented based on a capacitor C13, a resistor R21 and a Zener diode D7 in parallel. Through the filtering effect of the capacitor C13, the voltage limiting effect of the resistor R21 and the voltage stabilizing effect of the Zener diode D7, the input voltage and current of the transformer T1 are stabilized. For example, the input voltage of the transformer T1 is less than or equal to 13V.

[0058] At the same time, in order to make the entire voltage regulation circuit more stable, the electrolytic capacitor C8 can be connected to the input end of the first power management chip U8, and the other end of the electrolytic capacitor C8 is grounded to perform energy storage filtering, so that the entire voltage regulation circuit is more stable.

[0059] The present application also provides a switch control circuit. Figure 5 , the switch control circuit includes a connection terminal CON1, a load terminal, a voltage stabilizing diode D11 and a tenth resistor R11: One end of the connection terminal CON1 is connected to the first node in the voltage regulating circuit according to any one of claims 1 to 8, and the other end is grounded; Two ends of the connection terminal CON1 are connected to two ends of the load and two ends of the Zener diode D11, the anode of the Zener diode D11 is grounded, the cathode of the Zener diode D11 is connected to the tenth resistor R11, and the other end of the tenth resistor R11 is connected to the first working voltage.

[0060] like Figure 5 As shown, one end formed by connecting pins 1 and 2 of the connection terminal CON1 is grounded, and the positive electrode of the voltage zener diode D11 is grounded; one end formed by connecting pins 3 and 4 of the connection terminal CON1 is connected to the first node through a network label A8 and connected to the target voltage, and one end formed by connecting pins 3 and 4 of the connection terminal CON1 is connected to the negative electrode of the voltage zener diode D11 and one end of the tenth resistor R11, and the other end of the tenth resistor R11 is connected to the first working voltage 12V through a network label A6; the two ends of the connection terminal CON1 are respectively connected to the two ends of the load.

[0061] In this way, by reversely connecting the voltage zener diode D11 and connecting the voltage zener diode D11 and R24 in series, static electricity can be prevented from being generated during the operation of the load.

[0062] The device of the embodiment of the present application can execute the method provided by the embodiment of the present application, and the implementation principle is similar. The actions performed by each module in the device of each embodiment of the present disclosure correspond to the steps in the method of each embodiment of the present disclosure. For the detailed functional description of each module of the device, please refer to the description in the corresponding method shown in the previous text, which will not be repeated here.

[0063] The terms "first", "second", etc. in the claims, the specification, and the drawings of the embodiments of the present application are used to distinguish different objects rather than to describe a specific order.

[0064] It should be understood that, although each operation step is indicated by arrows in the flowchart of the embodiment of the present application, the implementation order of these steps is not limited to the order indicated by the arrows. Unless clearly stated herein, in some implementation scenarios of the embodiment of the present application, the implementation steps in each flowchart can be performed in other orders according to demand. In addition, some or all of the steps in each flowchart may include multiple sub-steps or multiple stages based on actual implementation scenarios. Some or all of these sub-steps or stages may be executed at the same time, and each sub-step or stage in these sub-steps or stages may also be executed at different times respectively. In different scenarios of execution time, the execution order of these sub-steps or stages may be flexibly configured according to demand, and the embodiment of the present application does not limit this.

[0065] In addition, those skilled in the art will understand that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. The terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or electronic device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or electronic devices.

[0066] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present disclosure. Displaying the phrase at various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments. The term "and / or" used in this disclosure and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0067] In the embodiments of the present application, the term "module" or "unit" refers to a computer program or a part of a computer program that has a predetermined function and works together with other related parts to achieve a predetermined goal, and can be implemented in whole or in part by using software, hardware (such as processing circuits or memories), or a combination thereof. Similarly, a processor (or multiple processors or memories) can be used to implement one or more modules or units. In addition, each module or unit can be part of an overall module or unit that includes the function of the module or unit.

[0068] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Professional and technical personnel may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0069] The above is only an optional implementation method for some implementation scenarios of the present disclosure. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the scheme of the present disclosure, other similar implementation methods based on the technical ideas of the present disclosure are also within the protection scope of the embodiments of the present application.

Claims

1. A voltage regulating circuit, characterized in that: include: A main circuit, used for performing a voltage conversion operation on an input voltage to generate a first working voltage and a first power supply voltage; the input voltage is a 12V or 24V DC voltage; A first signal control chip, used for adjusting the voltage across the first feedback unit according to the first power supply voltage; The first feedback unit is used to detect the voltage across the first feedback unit and feed back the detected first voltage to the first receiving unit; A voltage regulating potentiometer control chip, used for connecting to the first node; a second signal control chip, configured to adjust the voltage of the first node to a target voltage according to the first voltage received by the first receiving unit and the first working voltage under the control of the adjusting potentiometer control chip; The first node is connected to one end of a first resistor, the other end of the first resistor is connected to the second signal control chip and one end of a second resistor, and the other end of the second resistor is grounded.

2. The voltage regulating circuit according to claim 1, characterized in that: The voltage regulating circuit further includes a third resistor, a fourth resistor and a fifth resistor. One end of the first feedback unit is connected to the input pin of the first signal control chip, the other end of the first feedback unit is connected to one end of the third resistor and one end of the fourth resistor, the other end of the third resistor is grounded, and the other end of the fourth resistor is connected to the output pin of the first signal control chip; the first voltage is obtained by dividing the input voltage of the first signal control chip according to the resistance value of the third resistor and the resistance value of the fourth resistor; One end of the first receiving unit is connected to the first output pin of the second signal control chip through the fifth resistor, and the other end of the first receiving unit is grounded; the output voltage of the first output pin of the second signal control chip is obtained by the voltage across the fifth resistor and the first voltage; The other end of the first resistor and the second output pin of the second signal control chip are connected to one end of the second resistor; the target voltage is obtained by dividing the output voltage of the second output pin of the second signal control chip according to the resistance value of the first resistor and the resistance value of the second resistor.

3. The voltage regulating circuit according to claim 2, characterized in that: The first feedback unit is a light source of the first optical coupling element, and the first receiving unit is a light receiver of the first optical coupling element; The first feedback unit is used for transmitting the first optical signal to the first receiving unit by converting the first voltage into a first optical signal; The first receiving unit is used to receive the first optical signal and convert the first optical signal into the first voltage.

4. The voltage regulating circuit according to any one of claims 1 to 3, characterized in that: The main circuit includes a first power management chip, a third signal control chip, a transformer, a second feedback unit, a second receiving unit, a sixth resistor and a seventh resistor, wherein the first power management chip and the third signal control chip are located on one side of the transformer, and the second feedback unit is located on the other side of the transformer; wherein, The first power management chip is used to perform a voltage conversion process on the input voltage to obtain the first power supply voltage; The second feedback unit is used to detect the voltage across the second feedback unit based on the voltage at the output end of the transformer, and feed back the detected second voltage to the second receiving unit; The third signal control chip is used to adjust the voltage of the input end of the transformer according to the first power supply voltage and the second voltage received by the second receiving unit, so that after adjustment by the transformer, the voltage of the second node is the first working voltage; The transformer is used to perform voltage conversion processing on the voltage at the input end of the transformer to obtain the voltage at the input end of the transformer; Among them, one end of the sixth resistor, the first output pin in the output end of the transformer and one end of the seventh resistor are connected to form the second node.

5. The voltage regulating circuit according to claim 4, characterized in that: The main circuit also includes a capacitor, a PIN switch diode, an eighth resistor and a ninth resistor. The other end of the sixth resistor is connected to one end of the second feedback unit, The other end of the second feedback unit and the second pin of the PIN switch diode are connected to one end of the capacitor. The first pin of the PIN switch diode is connected to the other end of the seventh resistor, one end of the eighth resistor, and one end of the ninth resistor, and the other end of the capacitor is connected to the other end of the ninth resistor; the third pin of the PIN switch diode and the other end of the eighth resistor are grounded.

6. The voltage regulating circuit according to claim 5, characterized in that: The resistance of the seventh resistor is 39.2 kΩ, the resistance of the eighth resistor is 10 kΩ, the reference voltage of the PIN switch diode is 0.25 V, the first power supply voltage is less than or equal to 12 V, and the first operating voltage is 12 V.

7. The voltage regulating circuit according to claim 4, characterized in that: The second feedback unit is a light source of the second optical coupling element, and the second receiving unit is a light receiver of the second optical coupling element; The second feedback unit is used for transmitting the second optical signal to the second receiving unit by converting the second voltage into a second optical signal; The second receiving unit is used to receive the second optical signal and convert the second optical signal into the second voltage.

8. The voltage regulating circuit according to claim 4, characterized in that: The first input pin and the second input pin of the transformer are connected via a voltage stabilizing module and a rectifier diode connected in series, serving as the input end of the transformer; the input end of the rectifier diode is connected to the third signal control chip, and the output end of the rectifier diode is connected to the voltage stabilizing module; The first output pin and the second output pin of the transformer are connected via an electrolytic capacitor to serve as the output end of the transformer.

9. A switch control circuit, characterized in that: The circuit comprises a connecting terminal, a load terminal, a voltage stabilizing diode and a tenth resistor: One end of the connection terminal is connected to the first node in the voltage regulating circuit according to any one of claims 1 to 8, and the other end is grounded; Two ends of the connection terminal are connected to two ends of the load and two ends of the Zener diode, the anode of the Zener diode is grounded, the cathode of the Zener diode is connected to the tenth resistor, and the other end of the tenth resistor is connected to the first working voltage.

10. An electronic device, characterized in that: The electronic device serves as the load according to claim 9, is connected to both ends of the connection terminal, and operates under the switch control circuit.

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