CN219086992U - Core voltage switching circuit - Google Patents
Core voltage switching circuit Download PDFInfo
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- CN219086992U CN219086992U CN202223223910.5U CN202223223910U CN219086992U CN 219086992 U CN219086992 U CN 219086992U CN 202223223910 U CN202223223910 U CN 202223223910U CN 219086992 U CN219086992 U CN 219086992U
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Abstract
The application provides a core voltage switching circuit, including: the power chip, the first configuration resistor, the second configuration resistor, the first configuration switching component, the third configuration resistor and the second configuration switching component; the first configuration resistor is connected between an OUT pin of the power chip and an FB pin of the power chip in a bridging manner, one end of the second configuration resistor and one end of the third configuration resistor are connected to the FB pin of the power chip, the other end of the second configuration resistor is connected to one end of the first configuration switching component, and the other end of the first configuration component is connected with an external SOC control chip; the other end of the third configuration resistor is connected with one end of the second configuration switching component, and the other end of the second configuration component is connected with the other path of pins of the external SOC control chip. Through the different level states of IO1, IO2 input to outside SOC control chip, just can change the output voltage of circuit, the scheme of this application has control mode simple, output big advantage.
Description
Technical Field
The application relates to the field of vehicle engineering, in particular to a core voltage switching circuit.
Background
Under the condition that an SOC main power supply, a DDR power supply or other peripheral power supplies are different in working state and stability, the power supply voltage of the SOC main power supply, the DDR power supply or other peripheral power supplies is required to be modified in the hardware design and test process.
The current modifiable power supply voltage scheme needs to be controlled by an advanced MCU (micro control unit) or a special power supply chip, and has the defects of complex control mode, limited output capacity and the like.
Disclosure of Invention
An object of the present application is to provide a core voltage switching circuit, comprising: the power chip, the first configuration resistor, the second configuration resistor, the first configuration switching component, the third configuration resistor and the second configuration switching component; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first configuration resistor is connected between an OUT pin of the power chip and an FB pin of the power chip in a bridging way, one end of the second configuration resistor and one end of the third configuration resistor are connected to the FB pin of the power chip, the other end of the second configuration resistor is connected to one end of the first configuration switching component, and the other end of the first configuration component is connected with an external SOC control chip; the other end of the third configuration resistor is connected with one end of the second configuration switching component, and the other end of the second configuration component is connected with the other path of pins of the external SOC control chip.
In some optional embodiments, the first configuration switching component is a first configuration MOS transistor, a source of the first configuration MOS transistor is connected to the other end of the second configuration resistor, a gate of the first configuration MOS transistor is connected to an external SOC control chip pin, and a drain of the first configuration MOS transistor is grounded.
In some optional embodiments, the second configuration switching component is a second configuration MOS transistor, a source electrode of the second configuration MOS transistor is connected to the other end of the third configuration resistor, a gate electrode of the second configuration MOS transistor is connected to another external SOC control chip pin, and a drain electrode of the second configuration MOS transistor is grounded.
IN some alternative embodiments, the power chip includes an IN pin, which is a power chip power input pin.
In some alternative embodiments, the power chip is one of a TI chip, an MPS chip, or an ADI chip.
In some alternative embodiments, the first configuration switching component is one of a control switch, a relay, and an analog switch.
In some alternative embodiments, the second configuration switching component is one of a control switch, a relay, and an analog switch.
The application provides a core voltage switching circuit, including: the power chip, the first configuration resistor, the second configuration resistor, the first configuration switching component, the third configuration resistor and the second configuration switching component; the first configuration resistor is connected between an OUT pin of the power chip and an FB pin of the power chip in a bridging manner, one end of the second configuration resistor and one end of the third configuration resistor are connected to the FB pin of the power chip, the other end of the second configuration resistor is connected to one end of the first configuration switching component, and the other end of the first configuration component is connected with an external SOC control chip; the other end of the third configuration resistor is connected with one end of the second configuration switching component, and the other end of the second configuration component is connected with the other path of pins of the external SOC control chip. Through the different level states of IO1, IO2 input to outside SOC control chip, just can change the output voltage of circuit, the scheme of this application has control mode simple, output big advantage.
Additional features and advantages of the present application will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate the application and, together with the description, do not limit the application. In the drawings:
fig. 1 is a schematic structural diagram of a core voltage switching circuit according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of the relationship between the SOC and the core voltage switching circuit (PWR) provided herein.
Detailed Description
The following detailed description of specific embodiments of the present application refers to the accompanying drawings. It should be understood that the detailed description is presented herein for purposes of illustration and explanation only and is not intended to limit the present application.
Referring to fig. 1, in an embodiment of the present application, a core voltage switching circuit is provided, including: a power chip, a first configuration resistor R1, a second configuration resistor R2, a first configuration switching component Q1, a third configuration resistor R3 and a second configuration switching component Q2; the first configuration resistor R1 is bridged between an OUT pin of the power chip and an FB pin of the power chip, one end of the second configuration resistor R2 and one end of the third configuration resistor R3 are both connected to the FB pin of the power chip, the other end of the second configuration resistor R2 is connected to one end of the first configuration switching component Q1, and the other end of the first configuration switching component Q1 is connected with an external SOC control chip; the other end of the third configuration resistor R3 is connected with one end of the second configuration switching component Q2, and the other end of the second configuration switching component Q2 is connected with the other path of pins of the external SOC control chip. The power supply chip adjusts the output interface voltage, maintains the constant voltage configuration interface voltage, under the normal working condition, the FB voltage is obtained by dividing the output voltage of the power supply chip through R1 and R2, and the magnitude of the output voltage value can be changed by changing the resistance ratio of R1 and R2.
It should be noted that most of the adjustable output voltage power supply chips have an input interface IN, an output interface OUT, a voltage configuration interface FB, and so on. The IN pin is a power supply input pin of the power supply chip. The power chip may be one of a TI chip, an MPS chip, or an ADI chip.
The core voltage switching circuit can change the output voltage of the circuit by inputting different level states to IO1 and IO2 through the external SOC control chip, and the scheme of the application has the advantages of simple control mode and high output power.
Optionally, the first configuration switching component is a first configuration MOS transistor, a source electrode of the first configuration MOS transistor is connected to the other end of the second configuration resistor, a gate electrode of the first configuration MOS transistor is connected to an external SOC control chip pin, and a drain electrode of the first configuration MOS transistor is grounded. The second configuration switching component is a second configuration MOS tube, a source electrode of the second configuration MOS tube is connected with the other end of the third configuration resistor, a grid electrode of the second configuration MOS tube is connected with another path of pins of the external SOC control chip, and a drain electrode of the second configuration MOS tube is grounded. In further embodiments, the first configuration switching component and the second configuration switching component may each be one of a control switch, a relay, and an analog switch.
The working process of the core voltage switching circuit provided by the application is described below by taking a switching component as an MOS as an example, and referring to FIG. 1, the on and off of the low-side resistor in the voltage dividing resistor are continuously changed by using an NMOS, whether the resistor is connected into the circuit or not is changed, when the external IO input is high level, the MOS is led in, the resistor is connected into the circuit, the resistor is divided by R1, the OUT outputs a specific voltage value, when the other IO input is high level, the other resistor is divided by R1, another specific voltage value is output, when the two paths of input are both high level, the two paths of resistors form a parallel connection relationship, and the parallel connection relationship and the R1 voltage dividing power chip jointly output a third voltage.
The relation between the SOC and the core voltage switching circuit (PWR) provided by the application is shown in fig. 2, and the SOC is connected to the SOC VCC part, so that when the SOC needs to adjust the voltage, the SOC changes the output state of the GPIO, controls the working state of the module, and further controls the output voltage of the module.
The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the various possible combinations are not described further.
Moreover, any combination of the various embodiments of the present application may be made, as long as it does not depart from the spirit of the present application, which should also be construed as the subject matter of the present application.
Claims (7)
1. A core voltage switching circuit, comprising: the power chip, the first configuration resistor, the second configuration resistor, the first configuration switching component, the third configuration resistor and the second configuration switching component; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first configuration resistor is connected between an OUT pin of the power chip and an FB pin of the power chip in a bridging manner, one end of the second configuration resistor and one end of the third configuration resistor are connected to the FB pin of the power chip, the other end of the second configuration resistor is connected to one end of the first configuration switching component, and the other end of the first configuration switching component is connected with an external SOC control chip; the other end of the third configuration resistor is connected with one end of a second configuration switching component, and the other end of the second configuration switching component is connected with the other path of pins of the external SOC control chip.
2. The circuit of claim 1, wherein the first configuration switching component is a first configuration MOS transistor, a source of the first configuration MOS transistor is connected to the other end of the second configuration resistor, a gate of the first configuration MOS transistor is connected to an external SOC control chip pin, and a drain of the first configuration MOS transistor is grounded.
3. The circuit according to claim 1 or 2, wherein the second configuration switching component is a second configuration MOS transistor, a source electrode of the second configuration MOS transistor is connected to the other end of the third configuration resistor, a gate electrode of the second configuration MOS transistor is connected to another external SOC control chip pin, and a drain electrode of the second configuration MOS transistor is grounded.
4. The circuit of claim 1, wherein the power chip comprises an IN pin, the IN pin being a power chip power input pin.
5. The circuit of claim 1, wherein the power chip is one of a TI chip, an MPS chip, or an ADI chip.
6. The circuit of claim 1, wherein the first configuration switching component is one of a control switch, a relay, and an analog switch.
7. The circuit of claim 1, wherein the second configuration switching component is one of a control switch, a relay, and an analog switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223223910.5U CN219086992U (en) | 2022-12-01 | 2022-12-01 | Core voltage switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223223910.5U CN219086992U (en) | 2022-12-01 | 2022-12-01 | Core voltage switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219086992U true CN219086992U (en) | 2023-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223223910.5U Active CN219086992U (en) | 2022-12-01 | 2022-12-01 | Core voltage switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219086992U (en) |
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2022
- 2022-12-01 CN CN202223223910.5U patent/CN219086992U/en active Active
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