公开(公告)号：US10811185B2

公开(公告)日：2020-10-20

申请号：US16130899

申请日：2018-09-13

Applicant: Analog Devices Global Unlimited Company

Inventor： Liuqing Yang ,  Jian Ye ,  Zhijie Zhu

IPC: H02M3/335 ,  H01F27/40 ,  H02M7/06 ,  H02M1/40

Abstract: The subject disclosure provides for utilizing pulse width modulation (PWM) signaling to influence a closed loop of a shunt boost controller and reduce an imbalance of a load. The imbalance reduction helps reduce remanence of a current transformer (CT) and thereby prevent saturation of the CT. A shunt boost controller provides the control signal to control flow of current to the load. A feedback network provides a feedback signal to the shunt boost controller based on a direct current (DC) voltage and causes a power switch circuit to turn on when a magnitude of the feedback signal exceeds a threshold magnitude. The PWM generator supplies a PWM signal to cause the control signal to be provided more symmetrical to the power switch circuit and causes the power switch circuit to turn on more frequently with the control signal to reduce the imbalance of the load.

公开(公告)号：US09866136B2

公开(公告)日：2018-01-09

申请号：US14100463

申请日：2013-12-09

Applicant: Analog Devices Global

Inventor： Jun Duan ,  Liuqing Yang ,  Xudong Huang ,  Zhijie Zhu ,  Renjian Xie

IPC: H02M3/335 ,  H02M3/337

CPC classification number: H02M3/337 ,  H02M3/33569 ,  H02M3/33592 ,  Y02B70/1475

Abstract: A power converter can include an electrical isolation circuit between input and output nodes. An input signal monitor node can be provided, such as on a converter output side of the isolation circuit. In an example, a peak detection circuit can be coupled to the input signal monitor node. The output node of the power converter can be configured to supply an output power signal that is a function of an input signal at the input node. The power converter can include multiple, independently-switchable switches at one or more of the input and output sides of the isolation circuit. In an example, the power converter with the input signal monitor node can be configured as a bias supply to provide power, at the output node, to a controller circuit for a main stage power converter circuit.

公开(公告)号：US09577509B2

公开(公告)日：2017-02-21

申请号：US14260690

申请日：2014-04-24

Applicant: Analog Devices Global

Inventor： Basa Wang ,  Zhijie Zhu

IPC: H02M1/32 ,  H02M3/156 ,  H02M1/00

CPC classification number: H02M1/32 ,  H02M3/156 ,  H02M2001/0009

Abstract: An apparatus comprises a switching circuit, an error amplifier circuit, a current threshold circuit, and an over-current detection circuit. The switching circuit provides a switching duty cycle that includes a charge portion and a discharge portion. The error amplifier circuit generates an error signal representative of a difference between a target voltage value and a voltage at an output of the voltage regulator circuit. The switching circuit adjusts the switching duty cycle to regulate the voltage at the output using the error signal and a reference waveform signal. The current threshold circuit generates an adaptive peak current limit threshold. The over-current detection circuit generates an over-current signal when the reference waveform signal satisfies the adaptive peak current limit threshold during the charging portion of the switching cycle. The switching circuit interrupts one or more switching cycles when the reference waveform signal satisfies the adaptive peak current limit threshold.

Abstract translation: 一种装置包括开关电路，误差放大器电路，电流阈值电路和过电流检测电路。 开关电路提供包括充电部分和放电部分的开关占空比。 误差放大器电路产生表示目标电压值与电压调节器电路输出端的电压之差的误差信号。 开关电路调整开关占空比，以使用误差信号和参考波形信号来调节输出端的电压。 电流阈值电路产生自适应峰值电流限制阈值。 当在开关周期的充电部分中参考波形信号满足自适应峰值电流限制阈值时，过电流检测电路产生过电流信号。 当参考波形信号满足自适应峰值电流限制阈值时，开关电路中断一个或多个开关周期。