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    • 4. 发明授权
    • DC-DC converter
    • DC-DC转换器
    • US08134348B2
    • 2012-03-13
    • US12395127
    • 2009-02-27
    • Shinichiro Yamada
    • Shinichiro Yamada
    • G05F1/00
    • H02M3/156
    • A DC-DC converter includes an error amplifying circuit to output an error signal by amplifying differences between a reference voltage and a feedback voltage for an output voltage generated by switching an output transistor between on and off, a triangular wave generation circuit to generate a triangular wave, a PWM comparison circuit to compares the triangular wave with the error signal and output a duty control signal having a duty ratio based on the comparison, a pulse width control circuit to control a pulse width of the duty control signal output from the PWM comparison circuit, and a drive circuit to drive the output transistor according to a signal output from the pulse width control circuit.
    • DC-DC转换器包括误差放大电路,用于通过放大参考电压和反馈电压之间的差异来输出误差信号,所述差异用于通过在输出和断开之间切换输出晶体管而产生的输出电压,三角波产生电路以产生三角形 波形,PWM比较电路,用于将三角波与误差信号进行比较,并输出基于该比较的占空比的占空比控制信号;脉冲宽度控制电路,用于控制从PWM比较输出的占空比控制信号的脉冲宽度 电路以及根据从脉宽控制电路输出的信号驱动输出晶体管的驱动电路。
    • 5. 发明授权
    • Switching regulator and method of adjusting pulse width
    • 开关调节器和脉宽调整方法
    • US07859239B2
    • 2010-12-28
    • US12209835
    • 2008-09-12
    • Shinichiro Yamada
    • Shinichiro Yamada
    • G05F1/40G05F1/56
    • H02M3/1588Y02B70/1466
    • A switching regulator switches according to an input signal and performs PWM control with a PWM pulse signal. The switching regulator includes a pulse width limiting circuit that includes a reference current source, a constant current source, a capacitor, an inverting block including a first switch circuit to supply a constant current to the capacitor and a second switch circuit to discharge a voltage across the capacitor to a ground, a determination circuit to determine whether the voltage across the capacitor becomes a given value or greater, and a limiting circuit to limit a pulse width of the PWM pulse signal. The inverting block further includes either a third switch circuit configured to pass the given constant current or a switching control circuit configured to cause the first and second switch circuits to pass the given constant current regardless of the PWM pulse signal.
    • 开关稳压器根据输入信号进行开关,并通过PWM脉冲信号进行PWM控制。 开关稳压器包括脉冲宽度限制电路,其包括参考电流源,恒流源,电容器,包括向电容器提供恒定电流的第一开关电路的反相块和用于向电容器放电的第二开关电路 将电容器接地,确定电路确定电容器两端的电压是否达到给定值或更大的限制电路,以限制PWM脉冲信号的脉冲宽度。 反相模块进一步包括配置成传递给定恒定电流的第三开关电路或配置成使第一和第二开关电路通过给定恒定电流而不管PWM脉冲信号如何的开关控制电路。