Quasi-frequency conversion control circuit and method based on single-inductor dual-output switch converter

The embodiment of the invention discloses a quasi-frequency conversion control circuit and method based on a single-inductor dual-output switch converter. A critical conduction mode and a discontinuous conduction mode are introduced to be combined to form a mixed conduction mode with a free-wheeling current value being zero, decoupling between different output loops of the single-inductor dual-output switch converter is achieved, the cross influence between two output branches is eliminated, and the output voltage of the single-inductor dual-output switch converter is improved. The single-inductor dual-output converter has the advantages of no cross influence between different output branches, high load transient response speed, simple structure, convenience in compensator design and the like, and the single-inductor dual-output converter can be more efficient and stable. 本发明实施例公开了基于单电感双输出开关变换器的准变频控制电路及方法。通过引入临界导电模式与断续导电模式相结合，形成续流电流值为零的混合导电模式，实现单电感双输出开关变换器不同输出回路之间的解耦，消除两个输出支路之间的交叉影响，本发明具有不同输出支路之间无交叉影响、负载瞬态响应速