Multi-phase switching converter and integrated circuit control device and control method thereof

Abstract

The invention discloses a multiphase switching converter and an integrated circuit control device and a control method thereof. The multi-phase switching converter comprises a master switching circuit with a first power switch and a plurality of slave switching circuits, and the control method comprises the following steps: receiving a slave temperature signal representing the slave power switch temperature of each slave switching circuit and a first temperature signal representing the first power switch temperature, proportionally integrating the difference between the slave temperature signal and the first temperature signal to provide a corresponding gain; multiplying a slave current signal representing a corresponding slave switching circuit current by the gain to provide a corresponding current feedback signal; proportional integration is carried out on the difference value between the current feedback signal and a first current signal representing the current of the main switch circuit, and corresponding bias is provided; providing a corresponding bias conduction duration signal based on the bias; and superposing the bias conduction duration signal and the first conduction duration signal to respectively generate conduction duration signals corresponding to the slave power switches.

Description

technical field [0001] Embodiments of the present invention relate to electronic circuits, in particular to a multi-phase switching converter with thermal balance function and its integrated circuit control device and control method. Background technique [0002] With its superior performance, multi-phase switching converters are widely used in solutions for high-performance CPU power supplies. The operating temperature of each phase switching circuit in a multi-phase switching converter should be equal. Overheating of any one phase switching circuit will make the operation of the switching converter unstable, and even cause the entire switching converter to be shut down. [0003] Generally, the multi-phase switching converter achieves the effect of temperature equalization by equalizing the output currents of the switching circuits of each phase. Ideally, when the output current of each phase switching circuit is equal, its power loss and its temperature rise should also b...

AI Technical Summary

Problems solved by technology

However, in today's application environment, the CPU application system and its peripheral devices are becoming more and more complex, and their power delivery requirements are also becoming more and more complex

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