阅读说明：本技术 供电电路和终端设备 (Power supply circuit and terminal equipment ) 是由 陶帮富 于 2019-10-25 设计创作，主要内容包括：本发明公开了供电电路和终端设备。该供电电路包括：检测模块、升压模块、降压模块和开关电路；检测模块连接开关电路,获取终端设备的工作状态信息,并输出第一控制信息或者第二控制信息至开关电路；开关电路的第一端连接检测模块,开关电路的第二端与升压模块的输出端和降压模块的输入端均连接,开关电路的第三端与降压模块的输出端和功率放大器的输入端均连接；升压模块与降压模块连接,在开关电路导通时,经过开关电路对功率放大器供电；以及在开关电路断开时,经过降压模块对所述功率放大器供电。在本发明实施例中,通过在供电电路中增加升压模块和开关电路,实现了智能终端在不同的工作状态下供电电路高压和低压电路的转换,降低了生产成本。(The invention discloses a power supply circuit and terminal equipment, wherein the power supply circuit comprises a detection module, a boosting module, a voltage reduction module and a switch circuit, the detection module is connected with the switch circuit and is used for acquiring the working state information of the terminal equipment and outputting th control information or second control information to the switch circuit, the th end of the switch circuit is connected with the detection module, the second end of the switch circuit is connected with the output end of the boosting module and the input end of the voltage reduction module, the third end of the switch circuit is connected with the output end of the voltage reduction module and the input end of a power amplifier, the boosting module is connected with the voltage reduction module and is used for supplying power to the power amplifier through the switch circuit when the switch circuit is switched on, and the power amplifier is supplied with power through the voltage reduction module when the switch circuit is switched off.)

kinds of power supply circuits, which are characterized by comprising a detection module, a boosting module, a voltage reduction module and a switch circuit;

the detection module is connected with the switch circuit and used for acquiring the working state information of the terminal equipment and outputting th control information or second control information to the switch circuit according to the working state information, wherein the th control information is used for indicating the switch circuit to be switched on, and the second control information is used for indicating the switch circuit to be switched off;

an th end of the switch circuit is connected with the detection module, a second end of the switch circuit is connected with the output end of the voltage boosting module and the input end of the voltage reducing module, and a third end of the switch circuit is connected with the output end of the voltage reducing module and the input end of the power amplifier;

the boosting module is connected with the voltage reducing module and used for supplying power to the power amplifier through the switching circuit when the switching circuit is switched on; and when the switch circuit is disconnected, the power amplifier is powered through the voltage reduction module.

2. The power supply circuit according to claim 1, wherein the switching circuit includes a MOS transistor, a gate of the MOS transistor is electrically connected to the input terminal of the detection module, a source of the MOS transistor is electrically connected to both the input terminal of the power amplifier and the output terminal of the voltage-reducing module, and a drain of the MOS transistor is electrically connected to both the output terminal of the voltage-increasing module and the input terminal of the voltage-reducing module.

3. The power supply circuit of claim 2, wherein the MOS transistor is an NMOS transistor.

4. The power supply circuit of claim 1, wherein an input terminal of the boost module is connected to a power supply voltage, and an output terminal of the boost module is connected to an input terminal of the buck module and the second terminal of the switch circuit.

5. The power supply circuit of claim 4, wherein the boost module comprises a boost power chip.

6. The power supply circuit of claim 1, wherein an input terminal of the voltage-reducing module is connected to an output terminal of the voltage-boosting module, and an output terminal of the voltage-reducing module is connected to the power amplifier and a third terminal of the switching circuit.

7. The power supply circuit of claim 6, wherein the buck module comprises a buck power chip.

8. The power supply circuit of claim 1, further comprising a control module, wherein a terminal of the control module is connected to the detection module, and a terminal of the control module is connected to a terminal of the switch circuit for controlling the switch circuit to be turned on and off.

Terminal equipment of , characterized in that it comprises a power supply module, a power amplifier and a supply circuit of any of claims 1-8, the input of the supply circuit being connected to the power supply module and the output of the supply circuit being connected to the power amplifier, so that the power supply module supplies power to the power amplifier via the supply circuit.

Technical Field

The invention relates to the field of power supply circuits, in particular to power supply circuits and terminal equipment.

Background

Due to the limitation of the current 4G technology, the experience of mobile phone communication and internet surfing is poor in weak signal environments such as basement staircases, and the like, so that the improvement of the power emission level of the mobile phone signal becomes problems to be solved urgently.

If the handheld terminal is enabled to support high-power output and supply power at low voltage, chips which can boost and buck must be designed, but the cost of the chips is expensive.

Disclosure of Invention

The embodiment of the invention provides power supply circuits and terminal equipment, so that the power supply circuits can realize the conversion between high-voltage circuits and low-voltage circuits under different working states of an intelligent terminal, and the production cost is reduced.

The embodiment of the invention provides power supply circuits, which comprise a detection module, a boosting module, a voltage reduction module and a switch circuit, wherein the detection module is used for detecting the voltage of a power supply;

the detection module is connected with the switch circuit and used for acquiring the working state information of the terminal equipment and outputting th control information or second control information to the switch circuit according to the working state information, wherein the th control information is used for indicating the switch circuit to be switched on, and the second control information is used for indicating the switch circuit to be switched off;

the th end of the switch circuit is connected with the detection module, the second end of the switch circuit is connected with the output end of the voltage boosting module and the input end of the voltage reducing module, and the third end of the switch circuit is connected with the output end of the voltage reducing module and the input end of the power amplifier;

the voltage boosting module is connected with the voltage reducing module and used for supplying power to the power amplifier through the switching circuit when the switching circuit is switched on; and when the switch circuit is disconnected, the power amplifier is powered through the voltage reduction module.

Optionally, the switching circuit includes an MOS transistor, a gate of the MOS transistor is electrically connected to the input terminal of the detection module, a source of the MOS transistor is electrically connected to both the input terminal of the power amplifier and the output terminal of the voltage-reducing module, and a drain of the MOS transistor is electrically connected to both the output terminal of the voltage-increasing module and the input terminal of the voltage-reducing module.

Optionally, the MOS transistor is an NMOS transistor.

Optionally, the input end of the voltage boosting module is connected to the power supply voltage, and the output end of the voltage boosting module is connected to the input end of the voltage reducing module and the second end of the switch circuit.

Optionally, the boost module includes a boost power supply chip.

Optionally, the input end of the voltage-reducing module is connected to the output end of the voltage-boosting module, and the output end of the voltage-reducing module is connected to the third ends of the power amplifier and the switch circuit.

Optionally, the voltage-reducing module includes a voltage-reducing power chip.

Optionally, the power supply circuit further includes a control module, an end of the control module is connected to the detection module, and another end of the control module is connected to the end of the switch circuit, and is used for controlling the switch circuit to be turned on and off.

The embodiment of the invention also provides terminal devices, which comprise a power supply module, a power amplifier and the power supply circuit described in any embodiment, wherein the input end of the power supply circuit is connected with the power supply module, and the output end of the power supply circuit is connected with the power amplifier, so that the power supply module supplies power to the power amplifier through the power supply circuit.

In the embodiment of the invention, the boosting module and the switching circuit are added in the power supply circuit, the switching circuit is switched on when the signal of the intelligent terminal is weak, the power supply supplies power to the power amplifier of the intelligent terminal through the boosting module, the power of the power amplifier is improved, the switching circuit is switched off when the signal of the intelligent terminal is strong, the power supply supplies power to the power amplifier of the intelligent terminal after passing through the boosting module and the voltage reduction module, the power consumption of the power amplifier is reduced, the switching between a high-voltage circuit and a low-voltage circuit of the power supply circuit is realized under different working states of the intelligent terminal, and the production cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a power supply circuit according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a power supply circuit according to a second embodiment of the invention;

fig. 3 is a schematic structural diagram of a power supply circuit in a third embodiment of the present invention.

Detailed Description

The present invention will now be described in further detail with reference to the drawings and examples, it being understood that the specific embodiments herein described are merely illustrative of and not restrictive on the broad invention, and it should be further noted that for the purposes of description, only some, but not all, of the structures associated with the present invention are shown in the drawings.