A hysteresis control circuit based on a multiphase power supply

Abstract

This invention discloses a hysteresis control circuit based on a multiphase power supply. The hysteresis control circuit includes multiple DC-DC converter units connected in parallel. The output of the hysteresis comparator module is connected to the DC-DC converter via a frequency control module. The frequency control module compares the switching frequency of the switching control signal output by the hysteresis comparator module with a reference switching frequency. When the switching frequency is greater than the reference switching frequency, the frequency control module sends a first adjustment command to the control terminal of the hysteresis comparator module to increase the width of the hysteresis window of the hysteresis comparator module, thereby reducing the actual switching frequency of the switching control signal finally output by the hysteresis comparator module to the DC-DC converter. In this way, by adjusting the switching frequency of the switching control signal output by the hysteresis comparator module in real time through the frequency control module, it is ensured that each DC-DC converter unit can accurately stabilize its switching frequency at the set value when conditions such as process, voltage, and temperature change, thus improving the stability of the circuit.

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