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1.发明授权Constant-peak-current minimum-off-time pulse frequency modulator for switching regulators 有权用于开关稳压器的恒峰值电流最小关断时间脉冲频率调制器公开(公告)号：US07439720B2
公开(公告)日：2008-10-21
申请号：US11509908
申请日：2006-08-25
CPC分类号： H02M3/156
摘要： Methods and apparatus are disclosed for controlling switching regulators to automatically switch from a traditional pulse-width modulation (PWM) mode, when the load current is higher than a predetermined value, to a pulse-frequency modulation (PFM) mode, when the load current drops to a point lower than the predetermine value. Switching modes increases the efficiency of the regulator when the load current is low without provoking a large output voltage transient. In some embodiments, a single switching cycle regulates the output in the PFM mode, which reduces the switching losses and enhances the efficiency of the regulator.
摘要翻译： 公开了用于当负载电流高于预定值时将控制开关调节器自动从传统脉宽调制（PWM）模式切换到脉冲 - 频率调制（PFM）模式的方法和装置，当负载电流 下降到低于预定值的点。 当负载电流低时，开关模式会提高调节器的效率，而不会引起大的输出电压瞬变。 在一些实施例中，单个开关周期调节PFM模式中的输出，这降低了开关损耗并提高了调节器的效率。
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2.发明授权Constant-peak-current minimum-off-time pulse frequency modulator for switching regulators 有权用于开关稳压器的恒峰值电流最小关断时间脉冲频率调制器公开(公告)号：US07116089B1
公开(公告)日：2006-10-03
申请号：US11261874
申请日：2005-10-28
IPC分类号： G05F1/613
CPC分类号： H02M3/156
摘要： Methods and apparatus are disclosed for controlling switching regulators to automatically switch from a traditional pulse-width modulation (PWM) mode, when the load current is higher than a predetermined value, to a pulse-frequency modulation (PFM) mode, when the load current drops to a point lower than the predetermine value. Switching modes increases the efficiency of the regulator when the load current is low without provoking a large output voltage transient. In some embodiments, a single switching cycle regulates the output in the PFM mode, which reduces the switching losses and enhances the efficiency of the regulator.
摘要翻译： 公开了用于当负载电流高于预定值时将控制开关调节器自动从传统脉宽调制（PWM）模式切换到脉冲 - 频率调制（PFM）模式的方法和装置，当负载电流 下降到低于预定值的点。 当负载电流低时，开关模式会提高调节器的效率，而不会引起大的输出电压瞬变。 在一些实施例中，单个开关周期调节PFM模式中的输出，这降低了开关损耗并提高了调节器的效率。
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