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    • 7. 发明申请
    • OVERCURRENT PROTECTION IN A BATTERY CHARGER
    • 电池充电器中的过电流保护
    • US20160204631A1
    • 2016-07-14
    • US14981776
    • 2015-12-28
    • INTERSIL AMERICAS LLC
    • Michael Jason HoustonJohn Stuart KleineLei ZhaoJia Wei
    • H02J7/00
    • H02J7/0029H02H3/202H02J7/007H02J2007/0039
    • Systems and methods for overcurrent protection in a battery charger are provided. For example, a method for overcurrent protection may include controlling a switching regulator to direct electrical current between the switching regulator and a battery port; sensing a voltage drop that is related to the electrical current passing between the switching regulator and the battery port; applying a first ramp voltage to the sensed voltage drop generating a modified sensed voltage drop; comparing the modified sensed voltage drop against at least one reference voltage; and when the modified sensed voltage drop exceeds the at least one reference voltage, changing operation of the switching regulator to protect the battery charger from an overcurrent state.
    • 提供了一种用于电池充电器中的过电流保护的系统和方法。 例如,用于过电流保护的方法可以包括控制开关调节器以引导开关调节器和电池端口之间的电流; 感测与在开关调节器和电池端口之间通过的电流相关的电压降; 对所感测的电压降施加第一斜坡电压,产生修改的感测电压降; 将修改的感测电压降与至少一个参考电压进行比较; 并且当修改的感测电压降超过至少一个参考电压时,改变开关调节器的操作以保护电池充电器免受过电流状态的影响。
    • 8. 发明申请
    • VOLTAGE CONVERTERS AND METHODS FOR USE THEREWITH
    • 电压转换器及其使用方法
    • US20150372613A1
    • 2015-12-24
    • US14539699
    • 2014-11-12
    • Intersil Americas LLC
    • Michael Jason HoustonLei Zhao
    • H02M7/217H02J7/00
    • H02J7/0052H02J3/00H02J2007/0059H02M1/14H02M3/158H02M7/04H02M2001/0003H02M2001/007Y10T307/406
    • A voltage error signal VERR is provided to a PWM controller of a voltage regular and used to produce a PWM signal that drives a power stage of the regulator. When operating in an adaptor current limit regulation mode, an adaptor current sense voltage VACS, indicative of an adapter current IA, is compared to an adapter current reference voltage VAC—REF to produce an adapter current error signal VAC—ERR. A compensator receives the adapter current error signal VAC—ERR and outputs a compensated adapter current error signal. The adaptor current sense voltage VACS, or a high pass filtered version thereof, is subtracted from the compensated adapter current error signal to produce the voltage error signal VERR provided to the PWM controller. Alternatively, an input voltage VIN, or a high pass filtered version thereof, is added to the compensated adapter current error signal to produce the voltage error signal VERR.
    • 电压误差信号VERR被提供给恒定电压的PWM控制器,并用于产生驱动调节器的功率级的PWM信号。 当在适配器电流限制模式下操作时,将指示适配器电流IA的适配器电流感测电压VACS与适配器电流参考电压VAC-REF进行比较,以产生适配器电流误差信号VAC-ERR。 补偿器接收适配器电流误差信号VAC-ERR并输出补偿的适配器电流误差信号。 从补偿的适配器电流误差信号中减去适配器电流感测电压VACS或其高通滤波版本,以产生提供给PWM控制器的电压误差信号VERR。 或者,将输入电压VIN或其高通滤波版本添加到经补偿的适配器电流误差信号以产生电压误差信号VERR。
    • 9. 发明申请
    • SYSTEM AND METHOD FOR MAINTAINING A CONSTANT OUTPUT VOLTAGE RIPPLE IN A BUCK CONVERTER IN DISCONTINUOUS CONDUCTION MODE
    • 在不连续导通模式下保持输出转换器中恒定输出电压纹波的系统和方法
    • US20150318786A1
    • 2015-11-05
    • US14312678
    • 2014-06-23
    • INTERSIL AMERICAS, LLC
    • Michael Jason HoustonSteven Patrick Laur
    • H02M3/158
    • H02M3/157H02M1/083H02M1/15H02M3/158H02M3/1588Y02B70/1466
    • The system and method creates a substantially constant output voltage ripple in a buck converter in discontinuous conduction mode by varying the on-time of a pulse width modulator (PWM) signal driving the buck converter when the buck converter is operating in discontinuous conduction mode. A first signal is generated that is a function of the switching frequency of the buck converter. This signal is low-pass filtered and compared with a second signal that is a function of the switching frequency of the buck converter when operating in continuous conduction mode and with constant PWM on-time. The output signal generated by the comparator is a signal that is equal to the ratio of said first signal and said second signal. The on-time of a voltage controlled oscillator is controlled by said output signal, the oscillator signal causing the on-time of said PWM signal to vary in a controlled fashion.
    • 该系统和方法通过改变当降压转换器工作在不连续导通模式时驱动降压转换器的脉冲宽度调制器(PWM)信号的导通时间,在不连续导通模式中的降压转换器中产生基本恒定的输出电压纹波。 产生第一信号,其是降压转换器的开关频率的函数。 该信号被低通滤波,并且与在连续导通模式下工作并且具有恒定PWM导通时间时的降压转换器的开关频率的函数的第二信号进行比较。 由比较器产生的输出信号是等于所述第一信号和所述第二信号的比率的信号。 电压控制振荡器的导通时间由所述输出信号控制,导致所述PWM信号导通时间的振荡器信号以受控的方式变化。