公开(公告)号：US20140266122A1

公开(公告)日：2014-09-18

申请号：US13827666

申请日：2013-03-14

Applicant: ANALOG DEVICES TECHNOLOGY

Inventor： Zhijie Zhu ,  Junxiao Chen ,  Bin Shao

IPC: H02M3/156

CPC classification number: H02M3/156 ,  H02M2003/1566

Abstract: Apparatus and methods for generating a drive signal of a switching signal are disclosed. A first circuit receives an oscillating reference signal, a first compensation signal, a second compensation signal, and a third compensation signal. The first compensation signal is indicative of an error between an output voltage of a power converter and a reference voltage. The second compensation signal is indicative of the error relative to a threshold. The third compensation signal is indicative of an output current of the power converter. The first circuit generates a comparison signal having a waveform including pulses having durations based at least partly on a combination of the periodic reference signal, the first compensation signal, the second compensation signal, and the third compensation signal. A second circuit receives a clock signal and the comparison signal and generates a drive signal for activation and deactivation of a driver transistor.

Abstract translation: 公开了用于产生开关信号的驱动信号的装置和方法。 第一电路接收振荡参考信号，第一补偿信号，第二补偿信号和第三补偿信号。 第一补偿信号表示功率转换器的输出电压与参考电压之间的误差。 第二补偿信号指示相对于阈值的误差。 第三补偿信号表示功率转换器的输出电流。 第一电路产生具有波形的比较信号，该波形包括至少部分地基于周期性参考信号，第一补偿信号，第二补偿信号和第三补偿信号的组合的具有持续时间的脉冲。 第二电路接收时钟信号和比较信号并产生用于驱动晶体管的激活和去激活的驱动信号。

公开(公告)号：US20140253083A1

公开(公告)日：2014-09-11

申请号：US13791240

申请日：2013-03-08

Applicant: ANALOG DEVICES TECHNOLOGY

Inventor： Bin Shao

IPC: G05F1/618

CPC classification number: H02M3/157 ,  H02M1/32 ,  H02M2001/0009 ,  H02M2001/0035

Abstract: In one aspect, this disclosure relates to a method of controlling current output from a switching regulator to a load via an inductor. Inductor current information can be sampled at a peak level, such as just before a transistor configured to cause current to flow through the inductor is turned off. The sampled inductor current can be compared with a reference current, and a current limit threshold can be adjusted based on the comparison. The output current of the switching regulator can be controlled based on a comparison of the current limit threshold with an indicator of current flowing through the inductor. This method can accurately and efficiently limit current in a switching regulator.

Abstract translation: 一方面，本公开涉及一种通过电感器控制从开关调节器到负载的电流输出的方法。 电感电流信息可以在峰值电平进行采样，例如在配置为使电流流过电感器的晶体管关闭之前。 可以将采样的电感电流与参考电流进行比较，并且可以基于比较来调整限流阈值。 可以基于电流限制阈值与流过电感器的电流指标的比较来控制开关稳压器的输出电流。 该方法可以准确有效地限制开关稳压器中的电流。