Acleap Power Inc.

Lishen Zhou

Yifeng Sun

Yuan Liu

Qixue Yu

Xiaojian Zhao

Embodiments of the present disclosure relate to a circuit for limiting duty cycle for a DC switching power supply. The circuit includes: a timing module and a switch control module. The timing module is configured to cause the variable output voltage to increase to a voltage threshold within a time shorter than a duration time of the first level of the period. The switch control module is configured to: in a period having the duty cycle greater than the maximum limit duty cycle, output a signal enabling the switch to be turned on before the variable output voltage increases to the voltage threshold, and output a signal enabling the switch to be turned off independently of the pulse signal after the variable output voltage increases to the voltage threshold. The circuit enables the duty cycle of the switch not to be excessively large during the transition phase.

Circuit for limiting duty cycle and DC switching power supply with constant output

Devices and methods for DC-to-DC conversion. The device includes a first transformer having a first winding at a primary side and a second winding at a secondary side. The device also includes a second transformer having a third winding at a primary side and a fourth winding at a secondary side. The device includes a controller configured to control a first current in the first winding of the first transformer and a second current in the third winding of the second transformer to flow in a first pattern, and to control the first current and the second current to flow in a second pattern.

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Shanghai, China

Lishen Zhou