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公开(公告)号：US10420179B1
公开(公告)日：2019-09-17
申请号：US16202184
申请日：2018-11-28
发明人： Ching-Yu Chen , Hsing-Shen Huang
摘要： A driver circuit supplies a positive voltage and a negative voltage to a load. The driver circuit includes: a positive power conversion circuit, coupled to the load, and generating the positive voltage according to an input voltage; a negative power conversion circuit, coupled to the positive power conversion circuit and the load, and generating the negative voltage according to the positive voltage; and a headroom adaptive adjustment circuit, coupled to the positive power conversion circuit and the load, and generating an adjustment signal according to one or more of a load current flowing through the load, the positive voltage Vp and the negative voltage Vn. The adjustment signal is sent to the positive power conversion circuit to adjust a regulation target of the positive voltage.
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公开(公告)号：US20230223987A1
公开(公告)日：2023-07-13
申请号：US18050784
申请日：2022-10-28
发明人： Jung-Sheng Chen , Chin-Yen Lin , Ching-Yu Chen , Ting-Jung Lo , Hsing-Shen Huang
CPC分类号： H04B1/7172 , H02M1/0009 , H02M1/0025 , H02M1/44 , H04B1/7174
摘要： A spread spectrum switching converter converts an input power to an output power. The spread spectrum switching converter includes a pulse width modulation (PWM) circuit and a pulse omission control circuit. The PWM circuit generate an initial PWM signal according to a feedback signal related to the output power. The initial PWM signal controls at least one switch to switch an inductor to generate the output power. The pulse omission control circuit generates a pulse omission control signal to mask a portion of pulses of the initial PWM signal, to thereby generate an adjusted PWM signal. The pulse omission control circuit randomly adjusts the pulse width of the pulse omission control signal according to a random control signal, such that the adjusted PWM signal has a spread spectrum characteristic.
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