Power module and output voltage regulating method thereof

Abstract

The invention relates to a power module and an output voltage regulating method thereof. The power module is provided with a voltage output end and comprises a power supply IC and an output voltage feedback network. The voltage output end is electrically connected with the output end of the power supply IC. The output voltage feedback network comprises a first divider resistor and a second divider resistor, wherein the first divider resistor and the second divider resistor are connected between the voltage output end and a reference potential in series, and a node between the first divider resistor and the second divider resistor is electrically connected with the feedback end of the power supply IC. In addition, the output voltage feedback network further comprises a divider resistance value regulating unit electrically connected between the node and the reference potential. The divider resistance value regulating unit comprises a three-end switch element and a third divider resistor. The three-end switch element comprises a first end, a second end and a control end. The first end is electrically connected with the reference potential, and the second end is electrically connected with the node through the third divider resistor. Thus, the multi-stage output voltage regulation of the power module can be achieved, and the power module has the advantages of being low in implementation cost, stable in implementation and the like.

Description

technical field [0001] The invention relates to the technical field of power management, in particular to a power module and an output voltage regulating method thereof. Background technique [0002] In the existing electronic product circuit, the power supply voltage power conversion module of each chip (referred to as the power module) generally has two modes, one is fixed voltage, which is relatively simple to deal with, and the disadvantage is that the voltage cannot be changed; the other is Dynamic adjustment, mostly through the cooperation of various functional chips and back-end equipment for dynamic adjustment processing, the disadvantage is that the implementation cost and technical requirements are high, and the adjustment range is generally preset according to the requirements of the chip specification, so the application range and technical requirements are relatively large. high. Contents of the invention [0003] In view of this, in order to overcome the def...

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Problems solved by technology

[0002] In the existing electronic product circuit, the power supply voltage power conversion module of each chip (referred to as the power module) generally has two modes, one is fixed voltage, which is relatively simple to deal with, and the disadvantage is that the voltage cannot be changed; the other is Dynamic adjustment, mostly through the cooperation of various functional chips and back-end equipment for dynamic adjustment processing, the disadvantage is that the implementation cost and technical requirements are high, and the adjustment range is generally preset according to the requirements of the chip specification, so the application range and technical requirements are relatively large. high

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