In modern society, digital switching power supply in the field of electronics has an irreplaceable role, digital switching power supply has been successfully applied to transportation, medical, mechanical aviation and other fields, which also reflects the importance of digital switching power supply, and digital switching power supply design is extremely important, we through efficient related design. Design method means to ensure the stability and continuity of digital switching power supply, thus meeting the needs of many industries. Therefore, this paper mainly discusses the PWM controller and MOSFET integrated chip and discusses the voltage adjustable digital switch control power supply circuit control
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