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On/off time modulation for constant on-time and constant off-time switching regulators
On/off time modulation for constant on-time and constant off-time switching regulators
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机译：接通/断开时间调制，用于恒定的接通时间和恒定的断开时间开关调节器
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摘要
An apparatus includes a constant on-time or constant off-time (COT) switching regulator configured to generate an output signal. The switching regulator includes a switch that is turned on or off for a specified amount of time during each of multiple switching cycles. The apparatus also includes a modulator configured to modulate the specified amount of time that the switch is turned on or off during at least some of the switching cycles. The specified amount of time that the switch is turned on or off during each of the switching cycles could be equal to tON/OFF+ΔtMODF(ωMOD), where tON/OFF denotes a constant amount of time, ΔtMOD denotes an amplitude of the second signal, ωMOD denotes a frequency of the second signal, and F( ) denotes a modulation function. This could help to modulate switching noise over a range of frequencies and spread electro-magnetic interference generated by the switching regulator.
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机译：一种设备，包括被配置为生成输出信号的恒定导通时间或恒定截止时间（COT）开关调节器。开关调节器包括一个开关，该开关在多个开关周期的每个周期内接通或断开指定的时间。该设备还包括调制器，该调制器被配置为在至少一些开关周期内调制开关被接通或断开的指定时间量。在每个开关周期内指定的开关打开或关闭时间等于t ON / OFF +Δt MOD F（ω MOD ），其中t ON / OFF 表示恒定的时间量，Δt MOD 表示第二个信号ω MOD 表示第二信号的频率，并且F（）表示调制函数。这可能有助于在一定频率范围内调制开关噪声，并扩展由开关调节器产生的电磁干扰。
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