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31. 发明申请

US20080094049A1 PWM modulator for scalable converters 有权
标题翻译：用于可扩展转换器的PWM调制器
公开(公告)号：US20080094049A1
公开(公告)日：2008-04-24
申请号：US11975469
申请日：2007-10-19
申请人： Wenkai Wu , George Schuellein
发明人： Wenkai Wu , George Schuellein
IPC分类号： H02M1/084
CPC分类号： H02M3/1584 , H02M1/084
摘要： A PWM modulator for generating a PWM control signal for operating transistor switches of a phase of a multi-phase converter including a plurality of ramp generators, each ramp generator receiving a dedicated clock input signal corresponding to a phase of the multi-phase converter and providing a ramp signal starting when the dedicated clock signal is received by the ramp generator, one of the plurality of ramp generators being dedicated to provide the PWM control signal; a plurality of comparators, each comparator associated with a respective ramp generator for terminating the ramp signal when a predefined inequality exists between an error amplifier output of a feedback loop of the multi-phase converter and an output of the associated ramp generator; a plurality of current generator circuits, each current generator circuit associated with a respective ramp generator for providing current to the dedicated ramp generator to control the slope of the ramp signal of the dedicated ramp generator, the dedicated ramp generator controlling its associated comparator to provide the PWM control signal; and a plurality of current generator control circuits for controlling the operation of the plurality of current generator circuits.
摘要翻译：一种用于产生PWM控制信号的PWM调制器，用于操作包括多个斜坡发生器的多相转换器的相位的晶体管开关，每个斜坡发生器接收对应于多相转换器的相位的专用时钟输入信号，并提供当斜坡发生器接收到专用时钟信号时启动的斜坡信号，多个斜坡发生器之一专用于提供PWM控制信号; 多个比较器，每个比较器与相应的斜坡发生器相关联，用于当多相转换器的反馈回路的误差放大器输出和相关联的斜坡发生器的输出之间存在预定义的不等式时终止斜坡信号; 多个电流发生器电路，每个电流发生器电路与相应的斜坡发生器相关联，用于向专用斜坡发生器提供电流以控制专用斜坡发生器的斜坡信号的斜率，专用斜坡发生器控制其相关比较器，以提供 PWM控制信号; 以及用于控制多个电流发生器电路的操作的多个电流发生器控制电路。

32. 发明申请

US20080043499A1 BUCK CONVERTER FAULT DETECTION METHOD 有权
标题翻译： BUCK转换器故障检测方法
公开(公告)号：US20080043499A1
公开(公告)日：2008-02-21
申请号：US11838339
申请日：2007-08-14
申请人： Wenkai Wu , George Schuellein
发明人： Wenkai Wu , George Schuellein
IPC分类号： H02H7/10
CPC分类号： H02H7/1213
摘要： A circuit for detecting faults in at least one converter in a converter system, the at least one converter including a switching stage having high- and low-side switches connected at a switching node and fault circuitry for managing a plurality of fault conditions. The circuit including a gate driver circuit connected to gate terminals of the high- and low-side switches for providing PWM signals to control the switching stage; a comparator circuit for comparing a voltage at the switching node to the input voltage and providing an output signal, the comparator circuit having output, positive and negative terminals; a fourth capacitor connected to the output terminal of the comparator circuit to generate an AC component of the comparator circuit output signal; and a rectifier circuit connected to the fourth capacitor for rectifying the AC component of the comparator circuit and providing a fault-indicating signal to the gate driver. The fault-indicating signal is used to drive the fault circuitry to correct a fault condition selected from the plurality of fault conditions in the converter system.
摘要翻译：一种用于检测转换器系统中的至少一个转换器中的故障的电路，所述至少一个转换器包括具有连接在开关节点的高侧和低侧开关的开关级，以及用于管理多个故障状况的故障电路。该电路包括连接到高侧和低侧开关的栅极端的栅极驱动电路，用于提供PWM信号以控制开关级; 比较器电路，用于将开关节点处的电压与输入电压进行比较并提供输出信号，所述比较器电路具有输出端子，正极端子和负极端子; 连接到比较器电路的输出端的第四电容器，以产生比较器电路输出信号的AC分量; 以及连接到第四电容器的整流电路，用于对比较电路的AC分量进行整流，并向门驱动器提供故障指示信号。故障指示信号用于驱动故障电路以校正从转换器系统中的多个故障状况中选择的故障状况。

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