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    • 9. 发明授权
    • Controlled DC voltage stabilizer
    • 受控直流稳压器
    • US5644481A
    • 1997-07-01
    • US547053
    • 1995-10-23
    • Hirofumi KonishiMasanori Yamanaka
    • Hirofumi KonishiMasanori Yamanaka
    • H02M3/28H02M3/335
    • H02M3/33523
    • A current source circuit is contained in an output control IC and amplifies a feedback current produced by a photocoupler by 7 to 10 times. The current amplifier has an adequate current amplification factor and is composed of an IC. A capacitor connected to the oscillator is charged by a current amplified at the current amplifier and a period of the output of the oscillator is controlled by the charging current. A conductive period of the switching device connected to the oscillator through a driver is also controlled. Accordingly, the amount of energy supplied to the secondary side of the switching transformer is also controlled and a stable secondary dc output voltage is produced. A stable voltage control is obtained over a wide range of loads, from a light load to a heavy load. Because the current amplification factor is stable against an environmental temperature condition and has little variation, there is no abnormal oscillation of the power source circuit due to a ripple component included in the secondary dc output voltage and a stable controlled dc voltage stabilizer can be realized.
    • 电流源电路包含在输出控制IC中,并将由光电耦合器产生的反馈电流放大7〜10次。 电流放大器具有足够的电流放大系数,由IC组成。 连接到振荡器的电容器由在电流放大器放大的电流充电,并且振荡器的输出周期由充电电流控制。 通过驱动器连接到振荡器的开关装置的导通时段也被控制。 因此,也控制供给到开关变压器的二次侧的能量的量,并且产生稳定的次级直流输出电压。 在宽负载范围内,从轻负载到重负载,可获得稳定的电压控制。 由于电流放大系数对环境温度条件稳定且变化小,所以由于二次直流输出电压中包含的纹波成分,电源电路不会发生异常振荡,因此可以实现稳定的受控直流稳压器。