公开(公告)号：US08624571B2

公开(公告)日：2014-01-07

申请号：US12647377

申请日：2009-12-24

申请人： José Barreiro da Silva ,  Rajul Ramesh Shah ,  Patrick Stanley Riehl

发明人： José Barreiro da Silva ,  Rajul Ramesh Shah ,  Patrick Stanley Riehl

IPC分类号： G05F1/00

CPC分类号： H02M3/156 ,  H02M2001/0032 ,  H03K7/06 ,  H03K7/08 ,  Y02B70/16

摘要： A DC-DC converter system having at least one DC-DC converter operating in either a PWM mode or a PFM mode is provided. The DC-DC converter system includes a state machine configured to control the switching between the PWM mode and PFM mode. The state machine determines whether an inductor current provided by the DC-DC converter reaches a first specified value for a selective number of clock cycles so switching between the PWM mode and PFM mode is to occur. A pulse generator circuit is connected to the state machine and being configured to provide the appropriate switching period for the PWM mode and the PFM mode at the time of switching. The pulse generator circuit is shared amongst the PWM mode or PFM mode and utilizes a master clock for its operations.

摘要翻译： 提供了具有以PWM模式或PFM模式工作的至少一个DC-DC转换器的DC-DC转换器系统。 DC-DC转换器系统包括配置为控制PWM模式和PFM模式之间的切换的状态机。 状态机确定由DC-DC转换器提供的电感电流是否达到选择数量的时钟周期的第一规定值，从而发生PWM模式和PFM模式之间的切换。 脉冲发生器电路连接到状态机，并且被配置为在切换时为PWM模式和PFM模式提供适当的开关周期。 脉冲发生器电路在PWM模式或PFM模式之间共享，并利用主时钟进行操作。

公开(公告)号：US20110156684A1

公开(公告)日：2011-06-30

申请号：US12647377

申请日：2009-12-24

申请人： José Barreiro da Silva ,  Rajul Ramesh Shah ,  Patrick Stanley Riehl

发明人： José Barreiro da Silva ,  Rajul Ramesh Shah ,  Patrick Stanley Riehl

IPC分类号： G05F1/10

CPC分类号： H02M3/156 ,  H02M2001/0032 ,  H03K7/06 ,  H03K7/08 ,  Y02B70/16

摘要： A DC-DC converter system having at least one DC-DC converter operating in either a PWM mode or a PFM mode is provided. The DC-DC converter system includes a state machine configured to control the switching between the PWM mode and PFM mode. The state machine determines whether an inductor current provided by the DC-DC converter reaches a first specified value for a selective number of clock cycles so switching between the PWM mode and PFM mode is to occur. A pulse generator circuit is connected to the state machine and being configured to provide the appropriate switching period for the PWM mode and the PFM mode at the time of switching. The pulse generator circuit is shared amongst the PWM mode or PFM mode and utilizes a master clock for its operations.

摘要翻译： 提供了具有以PWM模式或PFM模式工作的至少一个DC-DC转换器的DC-DC转换器系统。 DC-DC转换器系统包括配置为控制PWM模式和PFM模式之间的切换的状态机。 状态机确定由DC-DC转换器提供的电感电流是否达到选择数量的时钟周期的第一规定值，从而发生PWM模式和PFM模式之间的切换。 脉冲发生器电路连接到状态机，并且被配置为在切换时为PWM模式和PFM模式提供适当的开关周期。 脉冲发生器电路在PWM模式或PFM模式之间共享，并利用主时钟进行操作。