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US 9,425,676 B2Granted
Control method for series resonant converter
AssigneeZte Corporation
InventorsXichuan Liu, Shenghua Bao, Zhou Chen
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AssigneeZte Corporation
InventorsXichuan Liu, Shenghua Bao, Zhou Chen
Estimating the term…
Disclosed is a control method for a series resonant converter is provided, which includes: a feedback signal is acquired by collecting an analog output signal of a series resonant converter, and an operating frequency of the series resonant converter is changed according to the feedback signal; the series resonant converter adopts a hybrid control mode combing frequency and width modulation with width-fixed frequency modulation when lightly loaded or unloaded and a frequency modulation control mode when heavily loaded, wherein a switching can be conducted between the hybrid control mode and the frequency modulation control mode through hysteresis control. By adopting a hybrid control mode when a series resonant converter is lightly loaded or unloaded and switching between the hybrid control mode and a frequency modulation control mode through hysteresis control, the disclosure effectively addresses the problem that the voltage of a series resonant converter is unstable when the series resonant converter is lightly loaded or unloaded at a low voltage, effectively expands the output range of the series resonant converter, and also addresses the problems that it is difficult to control a loop due to the monotony of the gain of an output voltage during a duty cycle adjustment process.
A control method for a series resonant converter, comprising:
Dependencies are inferred from the claim text.