Chips, driver circuits and electronic devices

Abstract

This application provides a chip, a driver circuit, and an electronic device, belonging to the field of semiconductor technology. The chip provided in this application includes: a first power interface, a first voltage conversion circuit, a second voltage conversion circuit, a first pin, and a driver pin; the input terminal of the first voltage conversion circuit is electrically connected to the first power interface, the output terminal of the first voltage conversion circuit is electrically connected to the input terminal of the second voltage conversion circuit, and the output terminal of the second voltage conversion circuit is electrically connected to the driver pin; wherein, when the control terminal of the second voltage conversion circuit is grounded through the first pin, the driver pin outputs a first driving voltage; when the control terminal of the second voltage conversion circuit is not grounded through the first pin, the driver pin outputs a second driving voltage.

Description

Technical Field

[0001] This application belongs to the field of semiconductor technology, specifically relating to a chip, a driver circuit, and an electronic device. Background Technology

[0002] In related technologies, the voltage output by the chip's driver pin is fixed, and it cannot be directly connected to drive devices with different drive voltages. This limits the application scenarios of the chip and makes it difficult to use the chip flexibly and promote its widespread adoption. Summary of the Invention

[0003] The purpose of this application is to provide a chip, a driving circuit, and an electronic device, which aims to solve the technical problem in the related art that chips cannot be used to drive different types of devices due to their fixed output voltage.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] In a first aspect, embodiments of this application provide a chip, including: a first power interface, a first voltage conversion circuit, a second voltage conversion circuit, a first pin, and a driving pin;

[0006] The input terminal of the first voltage conversion circuit is electrically connected to the first power interface, the output terminal of the first voltage conversion circuit is electrically connected to the input terminal of the second voltage conversion circuit, and the output terminal of the second voltage conversion circuit is electrically connected to the drive pin.

[0007] Wherein, when the control terminal of the second voltage conversion circuit is grounded through the first pin, the drive pin outputs the first drive voltage;

[0008] When the control terminal of the second voltage conversion circuit is not grounded through the first pin, the drive pin outputs the second drive voltage.

[0009] Secondly, embodiments of this application provide a driving circuit, which includes the chip described in the first aspect.

[0010] Thirdly, embodiments of this application provide an electronic device, which includes the chip described in the first aspect.

[0011] The chip provided in this application includes a first power interface, a first voltage conversion circuit, a second voltage conversion circuit, a first pin, and a drive pin. The input terminal of the first voltage conversion circuit is electrically connected to the first power interface, the output terminal of the first voltage conversion circuit is electrically connected to the input terminal of the second voltage conversion circuit, and the output terminal of the second voltage conversion circuit is electrically connected to the drive pin. In this application embodiment, when the control terminal of the second voltage conversion circuit is grounded through the first pin, a first drive voltage is output; when the control terminal of the second voltage conversion circuit is not grounded through the first pin, a second drive voltage is output. The chip provided in this application embodiment allows the drive pin of the chip to output different drive voltages by changing the grounding state of the control terminal of the second voltage conversion circuit through the first pin, thereby making the chip suitable for driving different types of devices and facilitating the expansion of the chip's application scenarios. Attached Figure Description

[0012] Figure 1 This is one of the schematic diagrams of the chip structure provided in some embodiments of this application;

[0013] Figure 2 This is a schematic diagram of a first driving voltage and a second driving voltage provided in some embodiments of this application;

[0014] Figure 3 This is a second schematic diagram of the chip structure provided in some embodiments of this application;

[0015] Figure 4 This is one of the circuit diagrams of a first voltage conversion circuit and a second voltage conversion circuit provided in some embodiments of this application;

[0016] Figure 5 This is a second circuit diagram of a first voltage conversion circuit and a second voltage conversion circuit provided in some embodiments of this application;

[0017] Figure 6 This is the third schematic diagram of the chip structure provided in some embodiments of this application.

[0018] Figure 7 This is the fourth schematic diagram of the chip structure provided in some embodiments of this application;

[0019] Figure 8 This is a schematic diagram of the drive circuit provided in some embodiments of this application. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0022] Please see Figure 1 , Figure 1 This is one of the schematic diagrams of the chip structure provided in some embodiments of this application. For example... Figure 1 As shown, the chip provided in this embodiment includes a first power interface 110, a first voltage conversion circuit 120, a second voltage conversion circuit 130, a first pin 150, and a drive pin 140; the input terminal of the first voltage conversion circuit 120 is electrically connected to the first power interface 110, the output terminal of the first voltage conversion circuit 120 is electrically connected to the input terminal of the second voltage conversion circuit 130, and the output terminal of the second voltage conversion circuit 130 is electrically connected to the drive pin 140.

[0023] Alternatively, in one embodiment, the control terminal of the second voltage conversion circuit 130 is grounded via the first pin 150.

[0024] In this implementation, the voltage output by the first power interface 110 is defined as VCC. After the voltage VCC output by the first power interface 110 is converted by the first voltage conversion circuit 120 and the second voltage conversion circuit 130, the first driving voltage VL0 is output by the driving pin 140.

[0025] In another embodiment of this example, the control terminal of the second voltage conversion circuit 130 is not grounded through the first pin 150.

[0026] In this implementation, the second voltage conversion circuit 130, which is electrically connected to the first pin 150, acts as a voltage follower. The voltage VCC output from the first power interface 110 is converted by the first voltage conversion circuit 120, and then the second driving voltage VH0 is output from the driving pin 140.

[0027] Optionally, the first driving voltage is different from the second driving voltage.

[0028] To facilitate understanding of the variations in the chip's output drive voltage under different implementation methods, please refer to the previous section. Figure 2 .

[0029] Figure 2 In the diagram, identifier S1 indicates the voltage VCC output from the first power interface 110, identifier S2 indicates the first drive voltage, and identifier S3 indicates the second drive voltage. Figure 2 It can be seen that from time T0 to time T1, the control terminal of the second voltage conversion circuit 130 is grounded through the first pin 150, the second voltage conversion circuit 130 works, reduces the voltage output by the first voltage conversion circuit 120, and the chip outputs the first driving voltage; from time T1 to time T2, the control terminal of the second voltage conversion circuit 130 is not grounded through the first pin 150, the second voltage conversion circuit 130 is equivalent to a voltage follower, does not reduce the voltage output by the first voltage conversion circuit 120, and the chip outputs the second driving voltage.

[0030] In this embodiment, when the control terminal of the second voltage conversion circuit 130 is grounded through the first pin 150, a first driving voltage is output; when the control terminal of the second voltage conversion circuit 130 is not grounded through the first pin 150, a second driving voltage is output. The chip provided in this embodiment allows the driving pin 140 to output different driving voltages by changing the grounding state of the control terminal of the second voltage conversion circuit 130 through the first pin 150. This makes the chip suitable for driving different types of devices, thus expanding the chip's application scenarios.

[0031] Optionally, the control terminal of the second voltage conversion circuit 130 is electrically connected to the first pin 150;

[0032] When the first pin 150 is grounded, the drive pin 140 outputs the first drive voltage;

[0033] With the first pin 150 left floating, the drive pin 140 outputs a second drive voltage.

[0034] Please see Figure 3 ,like Figure 3As shown, the control terminal of the second voltage conversion circuit 130 is electrically connected to the first pin 150. In this case, if the first pin 150 is grounded, it is equivalent to the first pin 150 being electrically connected to a low-resistance circuit. In this implementation, the second voltage conversion circuit 130, which is electrically connected to the first pin 150, functions to convert the voltage. The control terminal of the second voltage conversion circuit 130 is grounded through the first pin 150, driving the first driving voltage to be output from the driving pin 140.

[0035] If the first pin 150 is left floating, it is equivalent to the first pin 150 being electrically connected to a high resistor. In this case, the control terminal of the second voltage conversion circuit 130 is not grounded through the first pin 150, and the drive pin 140 outputs the second drive voltage.

[0036] It should be noted that switching the first pin 150 between grounded and floating settings is equivalent to whether the second voltage conversion circuit 130 and the ground wire are connected via a switch or not. When the first pin 150 is grounded, it is equivalent to the second voltage conversion circuit 130 and the ground wire being connected via a switch, and the second voltage conversion circuit 130 performs the function of voltage conversion; when the first pin 150 is floating, it is equivalent to the second voltage conversion circuit 130 and the ground wire not being connected via a switch, and the second voltage conversion circuit 130 functions as a voltage follower.

[0037] Optionally, the voltage value of the second driving voltage is greater than the voltage value of the first driving voltage.

[0038] The first driving voltage VL0 is greater than or equal to 5V and less than or equal to 7V; optionally, VL0 is 6V. The second driving voltage VH0 is greater than or equal to 10V and less than or equal to 20V; optionally, the second driving voltage VH0 is 12V.

[0039] Optionally, the first voltage conversion circuit 120 includes a first resistor R1, a first Zener diode D1, and a first switching transistor K1;

[0040] The first terminal of the first switching transistor K1 serves as the input terminal of the first voltage conversion circuit 120. The first terminal of the first switching transistor K1 is also electrically connected to the first terminal of the first resistor R1. The second terminal of the first resistor R1 is electrically connected to the control terminal of the first switching transistor K1. The control terminal of the first switching transistor K1 is also electrically connected to the first electrode of the first Zener diode D1. The second electrode of the first Zener diode D1 is grounded. The second terminal of the first switching transistor K1 serves as the output terminal of the first voltage conversion circuit 120.

[0041] Please see Figure 4 and Figure 5The first voltage conversion circuit 120 mentioned above can be a step-down circuit composed of a first resistor R1, a first Zener diode D1 and a first switching transistor K1.

[0042] It should be understood that the voltage reduction capability of the first voltage conversion circuit 120 can be adjusted by regulating the parameters of each component in the first voltage conversion circuit 120. For example, the voltage reduction capability of the first voltage conversion circuit 120 can be adjusted by adjusting the resistance value of the first resistor R1. As another example, the voltage reduction capability of the first voltage conversion circuit 120 can be adjusted by adjusting the regulated voltage value of the first Zener diode D1.

[0043] In this embodiment, by defining the connection relationship between the first resistor R1, the first Zener diode D1 and the first switching transistor K1, a first voltage conversion circuit 120 with a step-down function is formed to realize the conversion of the output voltage of the first power interface 110.

[0044] Optionally, the second voltage conversion circuit 130 includes a second resistor R2, a second Zener diode D2, and a second switching transistor K2;

[0045] The first terminal of the second switching transistor K2 is electrically connected to the second terminal of the first switching transistor K1 as the input terminal of the second voltage conversion circuit 130. The first terminal of the second switching transistor K2 is also electrically connected to the first terminal of the second resistor R2. The second terminal of the second resistor R2 is electrically connected to the control terminal of the second switching transistor K2. The control terminal of the second switching transistor K2 is also electrically connected to the first electrode of the second Zener diode D2. The second electrode of the second Zener diode D2 is electrically connected to the first pin 150 as the control terminal of the second voltage conversion circuit 130. The second terminal of the second switching transistor K2 is electrically connected to the drive pin 140.

[0046] Please see Figure 4 The second voltage conversion circuit 130 described above can be a step-down circuit composed of a second resistor R2, a second Zener diode D2, and a second switching transistor K2. The output terminal of the second voltage conversion circuit 130 is also called the driver (DRI) terminal.

[0047] Optionally, when the first pin 150 is grounded, the second switch K2 is turned on, the second voltage conversion circuit 130 converts the voltage output by the first voltage conversion circuit 120, and the drive pin 140 outputs the first drive voltage.

[0048] Optionally, when the first pin 150 is left floating, the second switching transistor K2 is turned off, the second voltage conversion circuit 130 acts as a voltage follower, and the drive pin 140 outputs the second drive voltage.

[0049] It should be understood that the voltage reduction capability of the second voltage conversion circuit 130 can be adjusted by regulating the parameters of each component in the second voltage conversion circuit 130. For example, the voltage reduction capability of the second voltage conversion circuit 130 can be adjusted by adjusting the resistance value of the second resistor R2. As another example, the voltage reduction capability of the second voltage conversion circuit 130 can be adjusted by adjusting the regulated voltage value of the second Zener diode D2.

[0050] In this embodiment, by defining the connection relationship between the second resistor R2, the second Zener diode D2, and the second switch K2, a second voltage conversion circuit 130 with a voltage reduction function is formed to realize the conversion of the output voltage of the first voltage conversion circuit 120.

[0051] Optionally, both the first switch K1 and the second switch K2 are MOS switches. The first terminal of the first switch K1 is the drain, the second terminal of the first switch K1 is the source, and the control terminal of the first switch K1 is the gate. The first terminal of the second switch K2 is the drain, the second terminal of the second switch K2 is the source, and the control terminal of the second switch K2 is the gate.

[0052] The first electrode of the first Zener diode D1 is the cathode, and the second electrode of the first Zener diode D1 is the anode; the first electrode of the second Zener diode D2 is the cathode, and the second electrode of the second Zener diode D2 is the anode.

[0053] The Zener voltage of the first Zener diode D1 is higher than that of the second Zener diode D2;

[0054] The voltage value of the second driving voltage is greater than the voltage value of the first driving voltage.

[0055] Optionally, the regulated voltage of the first Zener diode D1 is set as the driving voltage of the MOS switch; the regulated voltage of the second Zener diode D2 is set as the driving voltage of the GaN switch. The second driving voltage is set as the driving voltage of the MOS switch; the first driving voltage is set as the driving voltage of the GaN switch.

[0056] In an alternative implementation scenario, the voltage output of the first power interface 110 is 15V, and the voltage regulation value of the first Zener diode D1 can be set to 11V, and the voltage regulation value of the second Zener diode D2 can be set to 6V.

[0057] If the anode of the second Zener diode D2 is grounded through the first pin 150, the voltage output by the first voltage conversion circuit 120 is the same as the Zener voltage of the first Zener diode D1, which is 11V. The voltage output by the second voltage conversion circuit 130 is the same as the Zener voltage of the second Zener diode D2, which is 6V. That is, the voltage output by the drive pin 140 is 6V, and the chip outputs the first drive voltage that can drive the GaN switch.

[0058] If the anode of the second Zener diode D2 is not grounded through the first pin 150, i.e., the first pin 150 is left floating, the voltage output by the first voltage conversion circuit 120 is the same as the Zener voltage of the first Zener diode D1, which is 11V. The second voltage conversion circuit 130 does not perform voltage conversion, and the voltage output by the drive pin 140 is 11V, i.e., the chip outputs a second drive voltage that can drive the MOS switch.

[0059] It should be understood that the magnitudes of the first and second driving voltages can also be adjusted by adjusting the regulated voltage values ​​of the first Zener diode D1 and the second Zener diode D2. For example, if the regulated voltage value of the first Zener diode D1 is set lower than the regulated voltage value of the second Zener diode D2, then the voltage value of the second driving voltage will be lower than the voltage value of the first driving voltage.

[0060] In an optional embodiment, the first switch K1 and the second switch K2 can also be transistors. In this embodiment, the first terminal of the first switch K1 is the collector, the second terminal of the first switch K1 is the emitter, and the control terminal of the first switch K1 is the base. The first terminal of the second switch K2 is the collector, the second terminal of the second switch K2 is the emitter, and the control terminal of the second switch K2 is the base.

[0061] Optionally, the second voltage conversion circuit 130 includes a third resistor R3, a third Zener diode D3, a third switch K3, a fourth resistor R4, and a fourth switch K4;

[0062] The first end of the third switch K3 is connected to the first end of the fourth switch K4 to form a first node P1. The first node P1 is electrically connected to the input terminal of the second voltage conversion circuit 130. The first end of the third resistor R3 is electrically connected to the first end of the third switch K3. The first end of the fourth resistor R4 is electrically connected to the first end of the fourth switch K4. The second end of the fourth resistor R4 is electrically connected to the control terminal of the fourth switch K4. The control terminal of the fourth switch K4 serves as the control terminal of the second voltage conversion circuit 130 and is electrically connected to the first pin 150. The second end of the third resistor R3 is electrically connected to the control terminal of the third switch K3. The control terminal of the third switch K3 is also electrically connected to the first electrode of the third Zener diode D3. The second electrode of the third Zener diode D3 is grounded. The second ends of the third switch K3 and the fourth switch K4 are both electrically connected to the drive pin 140.

[0063] Please see Figure 5 The aforementioned second voltage conversion circuit 130 can be a step-down circuit composed of a third resistor R3, a third Zener diode D3, a third switch K3, a fourth resistor R4, and a fourth switch K4.

[0064] Optionally, when the first pin 150 is grounded, the fourth switch K4 is turned on, the second voltage conversion circuit 130 converts the voltage output by the first voltage conversion circuit 120, and the drive pin 140 outputs the first drive voltage.

[0065] Optionally, with the first pin 150 left floating, the fourth switch K4 is turned off, the second voltage conversion circuit 130 acts as a voltage follower, and the drive pin 140 outputs the second drive voltage.

[0066] It should be understood that the voltage reduction capability of the second voltage conversion circuit 130 can be adjusted by regulating the parameters of each component in the second voltage conversion circuit 130. In this embodiment, by defining the connection relationship between the third resistor R3, the third Zener diode D3, the third switch K3, the fourth resistor R4, and the fourth switch K4, a second voltage conversion circuit 130 with a voltage reduction function is formed to realize the conversion of the output voltage of the first voltage conversion circuit 120.

[0067] Optionally, the first switch K1, the third switch K3, and the fourth switch K4 are all MOS switches. The first terminal of the first switch K1 is the drain, the second terminal of the first switch K1 is the source, and the control terminal of the first switch K1 is the gate. The first terminal of the third switch K3 is the drain, the second terminal of the third switch K3 is the source, and the control terminal of the third switch K3 is the gate. The first terminal of the fourth switch K4 is the drain, the second terminal of the fourth switch K4 is the source, and the control terminal of the fourth switch K4 is the gate.

[0068] The first electrode of the first Zener diode D1 is the cathode, the second electrode of the first Zener diode D1 is the anode, the first electrode of the third Zener diode D3 is the cathode, and the second electrode of the third Zener diode D3 is the anode;

[0069] The Zener voltage of the first Zener diode D1 is higher than that of the third Zener diode D3;

[0070] The voltage value of the second driving voltage is greater than the voltage value of the first driving voltage.

[0071] Optionally, the regulated voltage of the first Zener diode D1 is set as the driving voltage of the MOS switch; and the regulated voltage of the third Zener diode D3 is set as the driving voltage of the GaN switch. Optionally, the voltage of the second driving voltage is set as the driving voltage of the MOS switch; and the voltage of the first driving voltage is set as the driving voltage of the GaN switch.

[0072] In an alternative implementation scenario, the voltage output of the first power interface 110 is 15V, and the voltage regulation value of the first Zener diode D1 can be set to 11V, and the voltage regulation value of the second Zener diode D2 can be set to 6V.

[0073] With the first pin 150 grounded, the fourth switch K4 is turned on. The voltage output by the first voltage conversion circuit 120 is the same as the voltage regulated by the first Zener diode D1, which is 11V. The voltage output by the second terminal of the third switch K3 is the same as the voltage regulated by the third Zener diode D23, which is 6V. The voltage output by the second terminal of the fourth switch K4 is the same as the voltage output by the second terminal of the third switch K3. That is, the voltage output by the drive pin 140 is 6V. The chip outputs the first drive voltage that can drive the GaN switch.

[0074] With the first pin 150 floating, the fourth switch K4 is turned on. The voltage output by the first voltage conversion circuit 120 is the same as the voltage regulated by the first Zener diode D1, which is 11V. The voltage output by the second terminal of the fourth switch K4 is the same as the voltage output by the first voltage conversion circuit 120, which is 11V. The voltage output by the second terminal of the third switch K3 is the same as the voltage output by the second terminal of the fourth switch K4. That is, the voltage output by the drive pin 140 is 11V, and the chip outputs a second drive voltage that can drive the MOS switch.

[0075] It should be understood that the magnitudes of the first and second driving voltages can also be adjusted by adjusting the regulated voltage values ​​of the first and third Zener diodes D1 and D3. For example, if the regulated voltage value of the first Zener diode D1 is set lower than the regulated voltage value of the third Zener diode D3, then the voltage value of the second driving voltage will be lower than the voltage value of the first driving voltage.

[0076] In an optional embodiment, the first switch K1, the third switch K3, and the fourth switch K4 can also be transistors. In this embodiment, the first terminal of the first switch K1 is the collector, the second terminal of the first switch K1 is the emitter, and the control terminal of the first switch K1 is the base. The first terminal of the third switch K3 is the collector, the second terminal of the third switch K3 is the emitter, and the control terminal of the third switch K3 is the base. The first terminal of the fourth switch K4 is the collector, the second terminal of the fourth switch K4 is the emitter, and the control terminal of the fourth switch K4 is the base.

[0077] Optionally, the second voltage conversion circuit 130 includes a voltage conversion module 131 and a voltage follower 132;

[0078] The first terminal of the voltage conversion module 131 is electrically connected to the output terminal of the first voltage conversion circuit 120, the second terminal of the voltage conversion module 131 is grounded, and the third terminal of the voltage conversion module 131 is electrically connected to the drive pin 140.

[0079] The first terminal of the voltage follower 132 is electrically connected to the first terminal of the voltage conversion module 131, the second terminal of the voltage follower 132 is electrically connected to the first pin 150 as the control terminal of the second voltage conversion circuit 130, and the third terminal of the voltage follower 132 is electrically connected to the third terminal of the voltage conversion module 131.

[0080] Please see Figure 6 ,exist Figure 6In the schematic diagram of the chip structure shown, the second voltage conversion circuit 130 includes a voltage conversion module 131 and a voltage follower 132. It should be understood that the voltage conversion module 131 has the function of the second voltage conversion circuit 130, that is, the voltage conversion module 131 can convert the voltage output by the first voltage conversion circuit 120.

[0081] In an alternative embodiment, if the first pin 150 is left floating, the voltage follower 132 operates, and the voltage output by the voltage follower 132 is the same as the input voltage, both being the voltage output by the first voltage conversion circuit 120. In this embodiment, the voltage output by the drive pin 140 is the second drive voltage.

[0082] In an alternative embodiment, if the first pin 150 is grounded, the voltage follower 132 does not work, and the voltage output from the first power interface 110 is converted into a first driving voltage through the first voltage conversion circuit 120 and the second voltage conversion circuit 130.

[0083] The chip provided in this embodiment adjusts the working state of the voltage follower 132 through the specific setting of the first pin 150, thereby outputting different driving voltages to the outside.

[0084] Optionally, the second voltage conversion circuit 130 includes a voltage conversion module 131, a voltage follower 132, and a first switch K5;

[0085] The first terminal of the voltage conversion module 131 is electrically connected to the output terminal of the first voltage conversion circuit 120, the second terminal of the voltage conversion module 132 is grounded, and the third terminal of the voltage conversion module 132 is electrically connected to the drive pin 140.

[0086] The first end of the voltage follower 132 is electrically connected to the first end of the voltage conversion module 131. The second end of the voltage follower 132 serves as the control terminal of the second voltage conversion circuit 130 and is electrically connected to one end of the first switch K5. The other end of the first switch K5 is electrically connected to the first pin 150. The third end of the voltage follower 132 is electrically connected to the third end of the voltage conversion module 131. The first pin 150 is grounded.

[0087] When the first switch K5 is in the ON state, the control terminal of the second voltage conversion circuit 130 is grounded through the first pin 150, and the drive pin 140 outputs the first drive voltage;

[0088] When the first switch K5 is in the open state, the control terminal of the second voltage conversion circuit 130 is disconnected from the first pin 150, and the drive pin 140 outputs the second drive voltage.

[0089] Please see Figure 7 ,like Figure 7 As shown, the second voltage conversion circuit 130 includes a voltage conversion module 131, a voltage follower 132, and a first switch K5. One end of the first switch K5 is electrically connected to the control terminal of the second voltage conversion circuit 130, and the other end of the first switch K5 is grounded.

[0090] In an optional embodiment, if the first switch K5 is open, the voltage follower 132 operates, and the voltage output by the voltage follower 132 is the same as the input voltage, both being the voltage output by the first voltage conversion circuit 120. In this embodiment, the voltage output by the drive pin 140 is the second drive voltage.

[0091] In an alternative embodiment, if the first switch K5 is turned on, the voltage follower 132 does not work, and the voltage output by the first power interface 110 is converted into the first driving voltage through the first voltage conversion circuit 120 and the second voltage conversion circuit 130.

[0092] The chip provided in this embodiment adjusts the working state of the voltage follower 132 by turning the first switch K5 on or off, thereby outputting different driving voltages to the outside.

[0093] Please see Figure 8 This application also provides a driving circuit, such as... Figure 8 As shown, the driving circuit includes the chip described in the above embodiment. The specific implementation of the chip can be referred to the above description and can achieve the same technical effect; therefore, to avoid repetition, it will not be described in detail here.

[0094] Optionally, the driving pin 140 of the chip in the above driving circuit is connected to the control terminal of the external switching transistor.

[0095] Generally speaking, the driving voltage of GaN switches is 5V to 7V, and the driving voltage of MOS switches is 10V to 20V.

[0096] Optionally, if the external switching transistor is a GaN switching transistor, the control terminal of the chip's second voltage conversion circuit can be set to ground through the first pin 150. In this case, the drive pin 140 outputs the first drive voltage to turn on the GaN switching transistor.

[0097] As described above, in an optional embodiment, when the control terminal of the second voltage conversion circuit is grounded through the first pin 150, the drive pin 140 outputs a first drive voltage, which is 6V. In this case, if the external switch is a GaN switch, the GaN switch can be turned on.

[0098] Optionally, if the external switching transistor is a MOS switching transistor, the control terminal of the chip's second voltage conversion circuit can be set not to be grounded through the first pin 150. In this case, the drive pin 140 outputs the second drive voltage to turn on the MOS switching transistor.

[0099] As described above, in an optional embodiment, when the control terminal of the second voltage conversion circuit is not grounded through the first pin 150, the drive pin 140 outputs a second drive voltage, which is 12V. In this case, if the external switch is a MOS switch, the MOS switch can be turned on.

[0100] The driving circuit provided in this application includes the chip described in the above embodiment. By changing the grounding state of the control terminal of the second voltage conversion circuit inside the chip through the first pin 150, the driving circuit can output different driving voltages. The driving circuit does not need to set up an additional driving module, which simplifies the circuit structure of the driving circuit.

[0101] This application also provides an electronic device, which includes the chip described in the above embodiments or the driving circuit described above. The specific implementation of the chip and the specific implementation of the driving circuit can be referred to the above description and can achieve the same technical effect; therefore, to avoid repetition, they will not be described again.

[0102] The electronic device provided in this application includes the chip as described in the above embodiment or the driving circuit as described in the above embodiment. By changing the grounding state of the control terminal of the second voltage conversion circuit inside the chip through the first pin, the chip can output different driving voltages. The electronic device does not need to set up an additional driving module, which reduces the manufacturing cost of the electronic device.

[0103] In this application embodiment, the aforementioned electronic device may be a computer, mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), mobile internet device (MID), wearable device, e-reader, navigator, digital camera, etc.

[0104] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A driving circuit, characterized in that, The chip includes a first power interface, a first voltage conversion circuit, a second voltage conversion circuit, a first pin, and a drive pin. The input terminal of the first voltage conversion circuit is electrically connected to the first power interface, the output terminal of the first voltage conversion circuit is electrically connected to the input terminal of the second voltage conversion circuit, and the output terminal of the second voltage conversion circuit is electrically connected to the drive pin. Wherein, when the control terminal of the second voltage conversion circuit is grounded through the first pin, the drive pin outputs the first drive voltage; When the control terminal of the second voltage conversion circuit is not grounded through the first pin, the drive pin outputs the second drive voltage; The drive pin is connected to the control terminal of an external switching transistor; Wherein, when the external switching transistor is a GaN switching transistor and the control terminal of the second voltage conversion circuit is grounded through the first pin, the driving pin outputs a first driving voltage to turn on the GaN switching transistor. When the external switching transistor is a MOS switching transistor and the control terminal of the second voltage conversion circuit is not grounded through the first pin, the driving pin outputs a second driving voltage to turn on the MOS switching transistor.

2. The driving circuit according to claim 1, characterized in that, in, The control terminal of the second voltage conversion circuit is electrically connected to the first pin; When the first pin is grounded, the drive pin outputs a first drive voltage; When the first pin is left floating, the drive pin outputs a second drive voltage.

3. The driving circuit according to claim 1 or 2, characterized in that, The first voltage conversion circuit includes a first resistor, a first Zener diode, and a first switching transistor; The first terminal of the first switching transistor serves as the input terminal of the first voltage conversion circuit. The first terminal of the first switching transistor is also electrically connected to the first terminal of the first resistor. The second terminal of the first resistor is electrically connected to the control terminal of the first switching transistor. The control terminal of the first switching transistor is also electrically connected to the first electrode of the first Zener diode. The second electrode of the first Zener diode is grounded. The second terminal of the first switching transistor serves as the output terminal of the first voltage conversion circuit.

4. The driving circuit according to claim 3, characterized in that, The second voltage conversion circuit includes a second resistor, a second Zener diode, and a second switching transistor; The first terminal of the second switching transistor is electrically connected to the second terminal of the first switching transistor as the input terminal of the second voltage conversion circuit. The first terminal of the second switching transistor is also electrically connected to the first terminal of the second resistor. The second terminal of the second resistor is electrically connected to the control terminal of the second switching transistor. The control terminal of the second switching transistor is also electrically connected to the first electrode of the second Zener diode. The second electrode of the second Zener diode is electrically connected to the first pin as the control terminal of the second voltage conversion circuit. The second terminal of the second switching transistor is electrically connected to the drive pin. When the first pin is grounded, the second switch is turned on, and the drive pin outputs the first drive voltage. When the first pin is left floating, the second switch is turned off, and the drive pin outputs the second drive voltage.

5. The driving circuit according to claim 4, characterized in that, Both the first and second switching transistors are MOS switching transistors. The first terminal of the first switching transistor is the drain, the second terminal of the first switching transistor is the source, and the control terminal of the first switching transistor is the gate. The first terminal of the second switching transistor is the drain, the second terminal of the second switching transistor is the source, and the control terminal of the second switching transistor is the gate. The first electrode of the first Zener diode is the cathode, and the second electrode of the first Zener diode is the anode; the first electrode of the second Zener diode is the cathode, and the second electrode of the second Zener diode is the anode. The voltage regulation value of the first Zener diode is higher than that of the second Zener diode, and the voltage value of the second driving voltage is greater than that of the first driving voltage.

6. The driving circuit according to claim 3, characterized in that, The second voltage conversion circuit includes a third resistor, a third Zener diode, a third switching transistor, a fourth resistor, and a fourth switching transistor; The first end of the third switch is connected to the first end of the fourth switch to form a first node. The first node is electrically connected to the input terminal of the second voltage conversion circuit. The first end of the third resistor is electrically connected to the first end of the third switch. The first end of the fourth resistor is electrically connected to the first end of the fourth switch. The second end of the fourth resistor is electrically connected to the control terminal of the fourth switch. The control terminal of the fourth switch serves as the control terminal of the second voltage conversion circuit and is electrically connected to the first pin. The second end of the third resistor is electrically connected to the control terminal of the third switch. The control terminal of the third switch is also electrically connected to the first electrode of the third Zener diode. The second electrode of the third Zener diode is grounded. The second ends of both the third and fourth switches are electrically connected to the driving pin. When the first pin is grounded, the fourth switch is turned on, and the drive pin outputs the first drive voltage. When the first pin is left floating, the fourth switch is turned off, and the drive pin outputs the second drive voltage.

7. The driving circuit according to claim 6, characterized in that, The first switch, the third switch, and the fourth switch are all MOS switches. The first terminal of the first switch is the drain, the second terminal of the first switch is the source, and the control terminal of the first switch is the gate. The first terminal of the third switch is the drain, the second terminal of the third switch is the source, and the control terminal of the third switch is the gate. The first terminal of the fourth switch is the drain, the second terminal of the fourth switch is the source, and the control terminal of the fourth switch is the gate. The first electrode of the first Zener diode is the cathode, the second electrode of the first Zener diode is the anode, the first electrode of the third Zener diode is the cathode, and the second electrode of the third Zener diode is the anode; The Zener voltage of the first Zener diode is higher than that of the third Zener diode; The voltage value of the second driving voltage is greater than the voltage value of the first driving voltage.

8. The driving circuit according to claim 2, characterized in that, The second voltage conversion circuit includes a voltage conversion module and a voltage follower; The first terminal of the voltage conversion module is electrically connected to the output terminal of the first voltage conversion circuit, the second terminal of the voltage conversion module is grounded, and the third terminal of the voltage conversion module is electrically connected to the drive pin. The first terminal of the voltage follower is electrically connected to the first terminal of the voltage conversion module, the second terminal of the voltage follower is electrically connected to the first pin as the control terminal of the second voltage conversion circuit, and the third terminal of the voltage follower is electrically connected to the third terminal of the voltage conversion module.

9. The driving circuit according to claim 1, characterized in that, The second voltage conversion circuit includes a voltage conversion module, a voltage follower, and a first switch; The first terminal of the voltage conversion module is electrically connected to the output terminal of the first voltage conversion circuit, the second terminal of the voltage conversion module is grounded, and the third terminal of the voltage conversion module is electrically connected to the drive pin. The first terminal of the voltage follower is electrically connected to the first terminal of the voltage conversion module. The second terminal of the voltage follower serves as the control terminal of the second voltage conversion circuit and is electrically connected to one terminal of the first switch. The other terminal of the first switch is electrically connected to the first pin. The third terminal of the voltage follower is electrically connected to the third terminal of the voltage conversion module. The first pin is grounded. When the first switch is in the ON state, the control terminal of the second voltage conversion circuit is grounded through the first pin, and the drive pin outputs the first drive voltage; When the first switch is in the open state, the control terminal of the second voltage conversion circuit is disconnected from the first pin, and the drive pin outputs the second drive voltage.

10. The driving circuit according to any one of claims 1 to 2, characterized in that, The voltage value of the second driving voltage is greater than the voltage value of the first driving voltage.

11. An electronic device, characterized in that, The electronic device includes a drive circuit as described in any one of claims 1 to 10.

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