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Why does a DC DC converter have a bleeder resistor at its output?

At the output of the conventional DC/DC converter, there is an output voltage sampling resistor inside, and its main function is to sample and output the output voltage to the feedback circuit, which can function as a certain bleeder resistor; part of the DC/DC converter According to the user's needs, a pure resistive load will be added to the input to ensure the output of the DC/DC converter is stable. The pure resistive load can be used as a bleeder resistor.