Digital Pulse Width Modulation (DPWM) is the core of digital control switching power supply. Generally, there is a contradiction between DPWM resolution and system operating frequency in the implementation of DPWM. This paper proposes a new hybrid high-resolution DPWM implementation method, which uses the frequency multiplication and phase shifting functions of the digital clock manager (DCM) in FPGA, the high-frequency counting comparison module and the digital \"dithering\" method to achieve 11-bit DPWM resolution under the conditions of system hardware operating frequency of 32MHz and switching frequency of 1MHz.
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