公开(公告)号：US09231543B2

公开(公告)日：2016-01-05

申请号：US14153984

申请日：2014-01-13

Applicant: Apple Inc.

Inventor： Roderick Hogan ,  Joseph J. Curcio ,  Nathan A. Johanningsmeier ,  Casey L. Hardy

IPC: H03F99/00 ,  H03G3/00 ,  H03G3/20

CPC classification number: H03G3/004 ,  H03G3/20 ,  H03G3/3005

Abstract: A power converter has an output that is coupled in parallel with an energy reservoir circuit and a power supply node of an audio power amplifier. The converter can set an upper limit on its input supply current that is variable in accordance with a control input. A controller is to produce a signal, coupled to the control input of the power converter, that is responsive to a measure of input supply voltage of the power converter and either output voltage of the power converter or output power of the amplifier. Other embodiments are also described and claimed.

Abstract translation: 功率转换器具有与能量存储器电路和音频功率放大器的电源节点并联的输出。 转换器可以根据控制输入设置可变输入电源电流的上限。 控制器将产生耦合到功率转换器的控制输入端的信号，其响应于功率转换器的输入电源电压的测量以及功率转换器的输出电压或放大器的输出功率。 还描述和要求保护其他实施例。