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1. 发明申请

WO2005079513A2 HALF BRIDGE ADAPTIVE DEAD TIME CIRCUIT AND METHOD 审中-公开
标题翻译：半桥自适应死区时间电路和方法
公开(公告)号：WO2005079513A2
公开(公告)日：2005-09-01
申请号：PCT/US2005/005349
申请日：2005-02-22
申请人： INTERNATIONAL RECTIFIER CORPORATION , RUSU, Iulia , WILHELM, Dana , GREEN, Peter
发明人： RUSU, Iulia , WILHELM, Dana , GREEN, Peter
IPC分类号： G05F1/40 , H02M1/38
CPC分类号： H02M1/38 , H03K17/166 , H03K17/284 , H03K17/6871 , H03K2217/0063 , H03K2217/0072 , H03K2217/0081
摘要： A high voltage offset detection circuit registers the voltage at the midpoint of a switching half-bridge and may determine when the midpoint voltage reaches a given value to avoid hard-switching in the half-bridge switches. The midpoint voltage of the switching half-bridge is applied through a buffer to a MOSFET that is current limited to produce a voltage that reflects the voltage of the midpoint of the switching half-bridge. The voltage produced by the MOSFET may be supplied to a comparator with a threshold input to obtain a signal that indicates when the switches of the switching half-bridge may be turned on to avoid hard-switching. An adaptive dead-time circuit and method may comprise the above sensing circuit, a first circuit for generating a first signal indicative of a high to low transition of the midpoint voltage; and an output circuit for generating an adaptive dead-time output signal based thereon. A second circuit may generate a second signal indicative of a low to high transition of the voltage; wherein the output circuit generates the adaptive dead-time output signal based on both the first and second signals. The second circuit preferably generates the second signal by reproducing the first signal. The first circuit may generate the first signal by charging a capacitor in response to pulses, and the second circuit may generate the second signal by charging a second capacitor corresponding to said first capacitor, and the adaptive dead-time output signal may be responsive to the charges on the first and second capacitors.
摘要翻译：高电压失调检测电路在开关半桥的中点登记电压，并且可以确定中点电压何时达到给定值以避免半桥开关中的硬切换。开关半桥的中点电压通过缓冲器施加到电流限制的MOSFET，以产生反映开关半桥中点电压的电压。由MOSFET产生的电压可以提供给具有阈值输入的比较器，以获得指示开关半桥的开关何时导通以避免硬切换的信号。自适应死区时间电路和方法可以包括上述感测电路，用于产生指示中点电压的高到低转换的第一信号的第一电路; 以及用于基于此产生自适应死区时间输出信号的输出电路。第二电路可以产生指示电压的低到高转换的第二信号; 其中所述输出电路基于所述第一和第二信号两者产生所述自适应死区时间输出信号。第二电路优选地通过再现第一信号来产生第二信号。第一电路可以通过响应于脉冲对电容器充电来产生第一信号，并且第二电路可以通过对与所述第一电容器相对应的第二电容器进行充电来产生第二信号，并且自适应死区时间输出信号可以响应于在第一和第二电容器上充电。

2. 发明申请

WO2003059017A1 BASIC HALOGEN CONVERTOR IC 审中-公开
标题翻译：基本卤化物转换器IC
公开(公告)号：WO2003059017A1
公开(公告)日：2003-07-17
申请号：PCT/US2002/041836
申请日：2002-12-30
申请人： INTERNATIONAL RECTIFIER CORPORATION , GREEN, Peter , RUSU, Iulia
发明人： GREEN, Peter , RUSU, Iulia
IPC分类号： H05B37/02
CPC分类号： H05B39/02 , H05B39/045 , H05B41/2981
摘要： A driving circuit for providing a control signal to a power semiconductor device for providing power to a filament lamp, said driving circuit comprising an oscillator for generating said control signal. The driving circuit may further comprise a soft start circuit (180) which controls said oscillator so as to avoid excessive current in said lamp at start-up; a voltage compensation circuit which controls said oscillator so as to compensate for variations in load; a shutdown circuit (254) for shutting down and automatically restarting said oscillator in response to a fault condition; an adaptive dead time circuit (78) which controls said oscillator for providing cool running of said power semiconductor device; and/or a dimming circuit which controls said oscillator for driving said lamp. The driving circuit and its control circuitry may be implemented in an integrated circuit (50).
摘要翻译：一种用于向功率半导体器件提供控制信号以向白炽灯提供电力的驱动电路，所述驱动电路包括用于产生所述控制信号的振荡器。驱动电路还可以包括软启动电路（180），其控制所述振荡器，以避免启动时所述灯中的过大电流; 电压补偿电路，其控制所述振荡器以补偿负载的变化; 关闭电路（254），用于响应于故障状况关闭和自动重启所述振荡器; 自适应死区电路（78），其控制所述振荡器以提供所述功率半导体器件的冷却运行; 和/或控制用于驱动所述灯的所述振荡器的调光电路。驱动电路及其控制电路可以在集成电路（50）中实现。

3. 发明申请

WO2004047298A2 DUAL SLOPE DUAL RANGE OSCILLATOR 审中-公开
标题翻译：双坡度双振荡器
公开(公告)号：WO2004047298A2
公开(公告)日：2004-06-03
申请号：PCT/US2003/036598
申请日：2003-11-14
申请人： INTERNATIONAL RECTIFIER CORPORATION
发明人： RUSU, Iulia , RIBARICH, Thomas
IPC分类号： H03L
CPC分类号： H03K3/0231
摘要： A dual range oscillator provides two different ranges of oscillator frequency output based on switched current sources charging a capacitor. As several current sources are combined to charge capacitor, the interval for charging the capacitor decreases and changes the oscillator frequency output accordingly. A reference voltage supplied to a comparator checks the voltage on the capacitor to determine when to combine current sources to charge the capacitor and modify the timing interval and the corresponding oscillator frequency output. The different current sources are switched to the capacitor to provide modified charging slopes. The dual slope, dual range oscillator permits frequency switching operation in a variety of environments and applications with a simplified control and integration into a single chip.
摘要翻译：双量程振荡器基于对电容器充电的开关电流源提供两种不同范围的振荡器频率输出。由于几个电流源被组合以对电容器充电，所以对电容器充电的间隔减小并相应地改变振荡器频率输出。提供给比较器的参考电压检查电容器上的电压，以确定何时组合电流源以对电容充电并修改定时间隔和相应的振荡器频率输出。将不同的电流源切换到电容器以提供改进的充电斜率。双斜率双范围振荡器允许在各种环境和应用中进行频率切换操作，简化控制并集成到单个芯片中。

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