Isolation type power supply circuit and control method thereof

Abstract

The invention discloses an isolation type power supply circuit and a control method thereof. The isolation type power supply circuit comprises a first reference ground, a second reference ground, a power supply, a first receiving circuit, a second receiving circuit, a first phase inverting circuit, a second phase inverting circuit and an isolation conversion circuit; the first reference ground andthe second reference ground are isolated mutually; the first receiving circuit is coupled with the first reference ground; the second receiving circuit is coupled with the second reference ground; the power supply directly outputs a first power supply signal to the first receiving circuit; the first phase inverting circuit and the second phase inverting circuit receive the first power supply signal to generate a first phase inverting circuit output signal and a second phase inverting circuit output signal; and a second power supply signal is output to the second receiving circuit through theisolation conversion circuit. Compared with the prior art, one power supply can supply power for multiple non-common-ground receiving circuits synchronously, so that the system size is reduced and thecost is lowered.

Description

technical field [0001] The present invention relates to an electronic circuit, specifically but not limited to an isolated power supply circuit and a control method thereof. Background technique [0002] In the application of electronic circuit systems, there are often multiple circuit systems that do not share a common ground. The traditional solution is to use multiple power supplies that do not share a common ground to supply power to these circuit systems that do not share a common ground. Such as figure 1 As shown, there are two receiving circuits that do not share a common ground in an electronic circuit system, namely the first receiving circuit 10 and the second receiving circuit 20, the first receiving circuit 10 is coupled to the first reference ground GND1, and the The second receiving circuit 20 is coupled to the second reference ground GND2. In the system, the power supply P1 provides the power signal Vdc1 for the first receiving circuit 10, and the power suppl...

AI Technical Summary

Problems solved by technology

like figure 1 As shown, there are two receiving circuits that do not share a common ground in an electronic circuit system, namely the first receiving circuit 10 and the second receiving circuit 20, the first receiving circuit 10 is coupled to the first reference ground GND1, and the The second receiving circuit 20 is coupled to the second reference ground GND2. In the system, the power supply P1 provides the power signal Vdc1 for the first receiving circuit 10, and the power supply P2 provides the power signal Vdc2 for the second receiving circuit 20, wherein the power supply P1 and the reference ground GND1 is coupled, and the power supply P2 is coupled to the reference ground GND2, but this solution of using multiple power supplies increases the size and cost of the system

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