The invention discloses a power supply
system, which comprises a digital power supply manager and a plurality of power supply modules, wherein each supply
power module is used for supplying power to a corresponding load, and comprises a power supply part of a non-isolated DC / DC (
Direct Current-
Direct Current) converter, a
signal sampling and converting circuit for providing analog
voltage signals for representing output
voltage, output current, temperature and the like, and a
driving circuit for receiving a pulse-width modulation (PWM)
signal and driving a switching device; a
closed loop voltage control and protection function of each power supply module is integrated into a digital power supply; the digital power supply manager comprises a nonvolatile memory containing a register; the register comprises a digital power supply manager configuration register, a power supply module setting register, a power supply module monitoring register and a user customizing space; and the digital power supply manager is used for compiling and monitoring the operation of each power supply module, and can further comprise a
user interface such as an I2C interface for receiving programmable data from a host user
system and transmitting
monitoring data.