CN213072450U

CN213072450U - Switchable power supply circuit

Info

Publication number: CN213072450U
Application number: CN202021835532.4U
Authority: CN
Inventors: 李俊明; 吴志高; 龚潇; 丁靖
Original assignee: Shenzhen Hongdian Technologies Corp
Current assignee: Shenzhen Hongdian Technologies Corp
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-04-27
Anticipated expiration: 2030-08-26

Abstract

The embodiment of the utility model discloses changeable supply circuit is connected with first electric module or second electric module, include: the signal input circuit is used for generating a first signal according to a connected first electric module or generating a second signal according to a connected second electric module; a voltage input terminal for inputting a first voltage; the control circuit is connected with the voltage input end and used for converting the first voltage into a second voltage according to the first signal or converting the first voltage into a third voltage according to the second signal; and the voltage output end is connected with the first electric module or the second electric module and is used for outputting a second voltage to the first electric module or outputting a third voltage to the second electric module. The utility model provides a pair of changeable power supply circuit is through judging the module type adjustment output voltage who connects, has solved the module required voltage difference and has leaded to appearing the problem that voltage is too high and burn out after the connection of different modules, has realized the effect according to link module dynamic adjustment output voltage.

Description

Switchable power supply circuit

Technical Field

The embodiment of the utility model provides a relate to the power supply technology, especially relate to a changeable supply circuit.

Background

The 5G technology is becoming mature at present, and the eight characteristics of the 5G technology bring about high power consumption of the module, which is represented by the fact that the power supply voltage is increased from the default 3.3V of the 4G module to the default 4.0V of the 5G module. Because the highest voltage that the module can bear is different, the performance of the 5G module installed on the 4G module can not exert the maximum performance.

The special chip has high cost due to large current to be supported, and needs large layout adjustment of the power supply, so that the special chip has large workload of change and is easy to have new risks. The compatibility of the 4G module must be realized in the current operation situation of a company, the 4G module needs to be compatible on a 5G module slot powered by 4.0V, and the resistance of the power supply voltage needs to be manually replaced. In actual operation, a plurality of semi-finished BOMs for different modules are matched. Although different semi-finished BOMs can ensure the normal operation of the whole machine in an assembly line, the power supply voltage cannot be dynamically updated along with the requirement updating or the testing requirement. The risk that the 4G module is burnt due to overhigh voltage when being inserted into the 5G module cannot be avoided.

SUMMERY OF THE UTILITY MODEL

The utility model provides a changeable supply circuit to the realization is according to the effect of link module dynamic adjustment output voltage.

In a first aspect, an embodiment of the present invention provides a switchable power supply circuit, connected to a first power utilization module or a second power utilization module, including:

a signal input circuit for generating a first signal according to the connected first electrical module or a second signal according to the connected second electrical module;

a voltage input terminal for inputting a first voltage;

the control circuit is connected with the voltage input end and used for converting the first voltage into a second voltage according to the first signal or converting the first voltage into a third voltage according to the second signal;

and the voltage output end is connected with the first electric module or the second electric module and is used for outputting a second voltage to the first electric module or outputting a third voltage to the second electric module.

Optionally, the first electrical module is a 4G module, and the second electrical module is a 5G module.

Optionally, the signal input circuit comprises a first signal input circuit and a second signal input circuit.

Optionally, the first signal input circuit includes: a MOS tube Q1, a resistor R4, a resistor R5 and a first signal input terminal PWR _ SEL0, wherein the gate of the MOS tube Q1 is connected to the first signal input terminal, the drain of the MOS tube Q1 is connected to the control circuit, and the source of the MOS tube Q1 is connected to the first terminal of the resistor R5; the second end of the resistor R5 is grounded, the first end of the resistor R4 is connected to the gate of the MOS transistor Q1, and the second end of the resistor R4 is grounded.

Optionally, the second signal input circuit includes: a MOS tube Q2, a resistor R6, a resistor R7 and a second signal input terminal PWR _ SEL1, wherein the gate of the MOS tube Q2 is connected to the second signal input terminal, the drain of the MOS tube Q2 is connected to the control circuit, and the source of the MOS tube Q2 is connected to the first terminal of the resistor R7; the second end of the resistor R7 is grounded, the first end of the resistor R6 is connected to the gate of the MOS transistor Q2, and the second end of the resistor R6 is grounded.

Optionally, the voltage input terminal includes an input terminal VDD.

Optionally, the voltage output terminal includes an output terminal VLTE.

Optionally, the control circuit includes a chip U1, a resistor R1, a capacitor C3, an inductor L1, a capacitor C1, a resistor R2, a resistor R3, a capacitor C2, and a capacitor C4, a first end of the capacitor C3 is connected to the voltage input terminal, and a second end of the capacitor C3 is grounded; a first end of the resistor R1 is connected to the 2 nd pin of the chip U1, and a second end of the resistor R1 is connected to the 1 st pin of the chip U1; a first end of the inductor L1 is connected to the 3 rd pin of the chip U1, and a second end of the inductor L1 is connected to the voltage output end; a first terminal of the capacitor C1 is connected to a first terminal of the resistor R2, and a second terminal of the capacitor C1 is connected to a second terminal of the resistor R2; the first end of the resistor R3 is connected to the second end of the resistor R2, and the second end of the resistor R3 is grounded; the first end of the capacitor C2 is connected to the second end of the inductor L1, and the second end of the capacitor C2 is grounded; the first end of the capacitor C4 is connected to the second end of the inductor L1, and the second end of the capacitor C4 is grounded.

Optionally, the apparatus further comprises a third signal input circuit, wherein the third signal input circuit is connected to the control circuit and is used for generating a third signal.

Optionally, the third signal input circuit includes: a MOS transistor Q3, a resistor R8, a resistor R9 and a third signal input terminal PWR _ SEL2, wherein the gate of the MOS transistor Q3 is connected to the third signal input terminal, the drain of the MOS transistor Q3 is connected to the control circuit, and the source of the MOS transistor Q3 is connected to the first terminal of the resistor R9; the second end of the resistor R9 is grounded, the first end of the resistor R8 is connected to the gate of the MOS transistor Q3, and the second end of the resistor R8 is grounded.

Drawings

Fig. 1 is a block diagram of a switchable power supply circuit according to a first embodiment of the present invention;

fig. 2 is a circuit diagram of a switchable power supply circuit according to a first embodiment of the present invention;

fig. 3 is a module connection diagram of a switchable power supply circuit according to a second embodiment of the present invention;

fig. 4 is a circuit diagram of a switchable power supply circuit according to a second embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the steps as a sequential process, many of the steps can be performed in parallel, concurrently or simultaneously. In addition, the order of the steps may be rearranged. A process may be terminated when its operations are completed, but may have additional steps not included in the figure. A process may correspond to a method, a function, a procedure, a subroutine, a subprogram, etc.

Furthermore, the terms "first," "second," and the like may be used herein to describe various orientations, actions, steps, elements, or the like, but the orientations, actions, steps, or elements are not limited by these terms. These terms are only used to distinguish one direction, action, step or element from another direction, action, step or element. For example, a first module may be termed a second module, and, similarly, a second module may be termed a first module, without departing from the scope of the present application. The first module and the second module are both modules, but they are not the same module. The terms "first", "second", etc. are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Example one

Fig. 1 is a module connection diagram of a switchable power supply circuit according to an embodiment of the present invention, the switchable power supply circuit provided by this embodiment is suitable for connecting a plurality of power utilization modules and providing a voltage, and specifically, the switchable power supply circuit provided by this embodiment is connected to a first power utilization module 5 or a second power utilization module 6, including: signal input circuit 1, voltage input terminal 2, control circuit 3 and voltage output terminal 4.

Referring to fig. 2, fig. 2 is a circuit diagram of a switchable power supply circuit provided in this embodiment, and the signal input circuit 1 is configured to generate a first signal according to the connected first power utilization module 5 or generate a second signal according to the connected second power utilization module 6. The signal input circuit 1 includes a first signal input circuit 11 and a second signal input circuit 12. The first signal input circuit 11 includes: a MOS tube Q1, a resistor R4, a resistor R5 and a first signal input terminal PWR _ SEL0, wherein the gate of the MOS tube Q1 is connected to the first signal input terminal, the drain of the MOS tube Q1 is connected to the control circuit 3, and the source of the MOS tube Q1 is connected to the first terminal of the resistor R5; the second end of the resistor R5 is grounded, the first end of the resistor R4 is connected to the gate of the MOS transistor Q1, and the second end of the resistor R4 is grounded. The second signal input circuit 12 includes: a MOS tube Q2, a resistor R6, a resistor R7 and a second signal input terminal PWR _ SEL1, wherein the gate of the MOS tube Q2 is connected to the second signal input terminal, the drain of the MOS tube Q2 is connected to the control circuit 3, and the source of the MOS tube Q2 is connected to the first terminal of the resistor R7; the second end of the resistor R7 is grounded, the first end of the resistor R6 is connected to the gate of the MOS transistor Q2, and the second end of the resistor R6 is grounded.

In the present embodiment, the signal input circuit 1 includes a first signal input circuit 11 and a second signal input circuit 12, wherein the first signal input terminal PWR _ SEL0 and the second signal input terminal PWR _ SEL1 are connected to an external software device, and the external software device can recognize that the voltage output terminal 4 is connected to the first power module 5 or the second power module 6, in the present embodiment, the first power module 5 is a 4G module, and the second power module 6 is a 5G module. The first signal and the second signal are used to act together on the control circuit 3 and control its output voltage. Software devices are configured to read VID (vendor ID) and PID (product identification code) under the USB BUS, both VID and PID being two bytes long, where Vendor ID (VID) is applied by vendors to the USB execution forum, VID is unique for each vendor, PID is vendor-specific, theoretically, different products, different models of the same product, different designs of the same model, and preferably different PIDs are used to distinguish different devices of the same manufacturer. The combination of PWR _ SEL0 and PWR _ SEL1 is selected based on the VID and PID lookup table to adjust the correct voltage level at the voltage output 4. Illustratively, Bus 001Device 002: ID 2c7c:0125 [ 4G module, adaptation voltage needs to be set to 3.3V, PWR _ SEL [1:0] ═ 00 ]; bus 001Device 002: ID 1c9e:9b3c [ 4G module, adaptation voltage needs to be set to 3.3V, PWR _ SEL [1:0] ═ 00 ]; bus 002Device 002: ID 2cb7:0105 [ 5G module, adaptation voltage needs to be set to 4.0V, PWR _ SEL [1:0] ═ 10 ]; bus 002Device 004: ID 12d1:15c3 [ 5G module, adaptation voltage needs to be set to 4.0V, PWR _ SEL [1:0] ═ 10 ]; connecting into other non-4G or 5G modules will not turn on the voltage select bits, i.e., PWR _ SEL [1:0] 00 remains in the default 3.3V voltage range because VID and PID are not within the 4.0V range of table turn on. MOS transistor Q1 and MOS transistor Q2 have requirements on the minimum voltage of Vds, and need to be matched with the Vfb voltage of the switching power supply. When calculating the feedback voltage with Vfb equal to 0.6V, it is recommended to use a BSH105 MOS transistor as shown. It must be ensured that Vds must be such that the MOS transistor can be turned on when Vfb is 0.6V. If the switching power supply chip Vfb at the previous stage is 0.8V or 1.23V, the selection of the model of MOS transistor Q1 and MOS transistor Q2 may be more.

The voltage input terminal 2 is used for inputting a first voltage, and the voltage input terminal 2 comprises an input terminal VDD.

In this embodiment, the first voltage of the input terminal VDD is generally an input 5V dc voltage, and can be connected to an external battery or a power supply terminal, and the input voltage can be adjusted according to actual circuit requirements, and generally matches with the control circuit 3.

The control circuit 3 is connected to the voltage input terminal 2, and is configured to convert the first voltage into a second voltage according to the first signal or convert the first voltage into a third voltage according to the second signal.

In this embodiment, the chip U1 is preferably a power chip with model MP2143, and has an operating voltage range of 2.5V-5.5V, when receiving the first signal, the representative voltage output terminal 4 is connected to the 4G module at this time, and the end of the control circuit 3 outputs 3.3V to the voltage output terminal 4, and when receiving the second signal, the representative voltage output terminal 4 is connected to the 5G module at this time, and the end of the control circuit 3 outputs 4V to the voltage output terminal 4. The unnecessary loss of mistakenly inserting the 4G module into the 5G module slot and burning the module due to the fact that the voltage exceeds the limit is avoided by 100%. The welding maintenance cost caused by the fact that the resistance needs to be detached and welded for many times in the testing process is reduced or eliminated.

The voltage output terminal 4 is connected to the first consumer module 5 or the second consumer module 6, and is configured to output a second voltage to the first consumer module 5 or output a third voltage to the second consumer module 6.

In the present embodiment, the voltage output terminal 4 is directly connected to the 4G module or the 5G module, and provides the 3.3V voltage output by the control circuit 3 to the 4G module or provides the 4V voltage output by the control circuit 3 to the 5G module.

The embodiment discloses a switchable power supply circuit, which is connected with a first electrical module or a second electrical module, and comprises: the signal input circuit is used for generating a first signal according to a connected first electric module or generating a second signal according to a connected second electric module; a voltage input terminal for inputting a first voltage; the control circuit is connected with the voltage input end and used for converting the first voltage into a second voltage according to the first signal or converting the first voltage into a third voltage according to the second signal; and the voltage output end is connected with the first electric module or the second electric module and is used for outputting a second voltage to the first electric module or outputting a third voltage to the second electric module. The utility model provides a pair of changeable power supply circuit is through judging the module type adjustment output voltage who connects, has solved the module required voltage difference and has leaded to appearing the problem that voltage is too high and burn out after the connection of different modules, has realized the effect according to link module dynamic adjustment output voltage.

Example two

Fig. 3 is a module connection diagram of a switchable power supply circuit according to a second embodiment of the present invention, where the switchable power supply circuit provided by this embodiment is suitable for connecting a plurality of power utilization modules and providing a voltage, and specifically, the switchable power supply circuit provided by this embodiment is connected to the first power utilization module 5 or the second power utilization module 6, and includes: signal input circuit 1, voltage input terminal 2, control circuit 3 and voltage output terminal 4.

Referring to fig. 4, fig. 4 is a circuit diagram of a switchable power supply circuit provided in this embodiment, in which the signal input circuit 1 is configured to generate a first signal according to the connected first power module 5 or generate a second signal according to the connected second power module 6. The signal input circuit 1 includes a first signal input circuit 11 and a second signal input circuit 12. The first signal input circuit 11 includes: a MOS tube Q1, a resistor R4, a resistor R5 and a first signal input terminal PWR _ SEL0, wherein the gate of the MOS tube Q1 is connected to the first signal input terminal, the drain of the MOS tube Q1 is connected to the control circuit 3, and the source of the MOS tube Q1 is connected to the first terminal of the resistor R5; the second end of the resistor R5 is grounded, the first end of the resistor R4 is connected to the gate of the MOS transistor Q1, and the second end of the resistor R4 is grounded. The second signal input circuit 12 includes: a MOS tube Q2, a resistor R6, a resistor R7 and a second signal input terminal PWR _ SEL1, wherein the gate of the MOS tube Q2 is connected to the second signal input terminal, the drain of the MOS tube Q2 is connected to the control circuit 3, and the source of the MOS tube Q2 is connected to the first terminal of the resistor R7; the second end of the resistor R7 is grounded, the first end of the resistor R6 is connected to the gate of the MOS transistor Q2, and the second end of the resistor R6 is grounded. And the control circuit further comprises a third signal input circuit 13, wherein the third signal input circuit 13 is connected with the control module and is used for generating a third signal. The third signal input circuit 13 includes: a MOS transistor Q3, a resistor R8, a resistor R9 and a third signal input terminal PWR _ SEL2, wherein the gate of the MOS transistor Q3 is connected to the first signal input terminal, the drain of the MOS transistor Q3 is connected to the control circuit 3, and the source of the MOS transistor Q3 is connected to the first terminal of the resistor R9; the second end of the resistor R9 is grounded, the first end of the resistor R8 is connected to the gate of the MOS transistor Q3, and the second end of the resistor R8 is grounded.

In the present embodiment, the signal input circuit includes a first signal input circuit 11, a second signal input circuit 12, and a third signal input circuit 13, wherein the first signal input terminal PWR _ SEL0, the second signal input terminal PWR _ SEL1, and the third signal input terminal PWR _ SEL2 are connected to an external software device, and the external software device can recognize that the voltage output terminal 4 is connected to the first power module 5 or the second power module 6, in the present embodiment, the first power module 5 is a 4G module, and the second power module 6 is a 5G module. In this embodiment, the accuracy and stability of the control signal are improved through the three signal input ends, and the circuit can continue to work when any one of the three signal input ends fails, so that the normal operation of the circuit is ensured.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A switchable power supply circuit for connection to a first consumer module or a second consumer module, comprising:

a voltage input terminal for inputting a first voltage;

2. The switchable power supply circuit of claim 1, wherein the first electrical module is a 4G module and the second electrical module is a 5G module.

3. A switchable power supply circuit as claimed in claim 1, wherein the signal input circuit comprises a first signal input circuit and a second signal input circuit.

4. A switchable power supply circuit as claimed in claim 3, wherein the first signal input circuit comprises: a MOS tube Q1, a resistor R4, a resistor R5 and a first signal input terminal PWR _ SEL0, wherein the gate of the MOS tube Q1 is connected to the first signal input terminal, the drain of the MOS tube Q1 is connected to the control circuit, and the source of the MOS tube Q1 is connected to the first terminal of the resistor R5; the second end of the resistor R5 is grounded, the first end of the resistor R4 is connected to the gate of the MOS transistor Q1, and the second end of the resistor R4 is grounded.

5. A switchable power supply circuit as claimed in claim 3, wherein the second signal input circuit comprises: a MOS tube Q2, a resistor R6, a resistor R7 and a second signal input terminal PWR _ SEL1, wherein the gate of the MOS tube Q2 is connected to the second signal input terminal, the drain of the MOS tube Q2 is connected to the control circuit, and the source of the MOS tube Q2 is connected to the first terminal of the resistor R7; the second end of the resistor R7 is grounded, the first end of the resistor R6 is connected to the gate of the MOS transistor Q2, and the second end of the resistor R6 is grounded.

6. A switchable power supply circuit as claimed in claim 1, characterized in that the voltage input comprises the input VDD.

7. A switchable power supply circuit as claimed in claim 1, characterized in that the voltage output comprises an output VLTE.

8. A switchable power supply circuit as claimed in claim 1, wherein said control circuit comprises a chip U1, a resistor R1, a capacitor C3, an inductor L1, a capacitor C1, a resistor R2, a resistor R3, a capacitor C2 and a capacitor C4, a first terminal of said capacitor C3 is connected to said voltage input terminal, a second terminal of said capacitor C3 is connected to ground; a first end of the resistor R1 is connected to the 2 nd pin of the chip U1, and a second end of the resistor R1 is connected to the 1 st pin of the chip U1; a first end of the inductor L1 is connected to the 3 rd pin of the chip U1, and a second end of the inductor L1 is connected to the voltage output end; a first terminal of the capacitor C1 is connected to a first terminal of the resistor R2, and a second terminal of the capacitor C1 is connected to a second terminal of the resistor R2; the first end of the resistor R3 is connected to the second end of the resistor R2, and the second end of the resistor R3 is grounded; the first end of the capacitor C2 is connected to the second end of the inductor L1, and the second end of the capacitor C2 is grounded; the first end of the capacitor C4 is connected to the second end of the inductor L1, and the second end of the capacitor C4 is grounded.

9. A switchable power supply circuit as claimed in claim 1, further comprising a third signal input circuit, said third signal input circuit being connected to said control circuit for generating a third signal.

10. A switchable power supply circuit as claimed in claim 9, wherein the third signal input circuit comprises: a MOS transistor Q3, a resistor R8, a resistor R9 and a third signal input terminal PWR _ SEL2, wherein the gate of the MOS transistor Q3 is connected to the third signal input terminal, the drain of the MOS transistor Q3 is connected to the control circuit, and the source of the MOS transistor Q3 is connected to the first terminal of the resistor R9; the second end of the resistor R9 is grounded, the first end of the resistor R8 is connected to the gate of the MOS transistor Q3, and the second end of the resistor R8 is grounded.