为提高开关电源控制电路的抗干扰性能,提出了3种设计方法。使开关电源控制电路工作在准谐振模式,并且控制与之配套使用的开关管在谷底导通,从而降低导通电流的尖峰值;通过采用"变频"技术,将开关电源中的电压和电流各次谐波的...为提高开关电源控制电路的抗干扰性能,提出了3种设计方法。使开关电源控制电路工作在准谐振模式,并且控制与之配套使用的开关管在谷底导通,从而降低导通电流的尖峰值;通过采用"变频"技术,将开关电源中的电压和电流各次谐波的频带进行展宽,以降低高次谐波的幅度;通过限制开关管的电流,降低电流纹波。采用0.25μm 5 V/40 V BCD工艺设计了开关电源控制的电路SX1608,进行流片和封装测试,并将之应用在实际的开关电源中,经测试开关电源的电流纹波较小,抗电磁干扰能力较强。展开更多
in this paper, the nonlinear response of spherical caps under centrally distributed pressures isstudied by the hybrid changeable basis Galerkin techmique. The influence of the boundary conditions and thesize of loaded...in this paper, the nonlinear response of spherical caps under centrally distributed pressures isstudied by the hybrid changeable basis Galerkin techmique. The influence of the boundary conditions and thesize of loaded radius on the nonlinear response of the caps is analyzed. The effectiveness of teclmique isdemonstrated by the numerical examples.展开更多
文摘为提高开关电源控制电路的抗干扰性能,提出了3种设计方法。使开关电源控制电路工作在准谐振模式,并且控制与之配套使用的开关管在谷底导通,从而降低导通电流的尖峰值;通过采用"变频"技术,将开关电源中的电压和电流各次谐波的频带进行展宽,以降低高次谐波的幅度;通过限制开关管的电流,降低电流纹波。采用0.25μm 5 V/40 V BCD工艺设计了开关电源控制的电路SX1608,进行流片和封装测试,并将之应用在实际的开关电源中,经测试开关电源的电流纹波较小,抗电磁干扰能力较强。
文摘in this paper, the nonlinear response of spherical caps under centrally distributed pressures isstudied by the hybrid changeable basis Galerkin techmique. The influence of the boundary conditions and thesize of loaded radius on the nonlinear response of the caps is analyzed. The effectiveness of teclmique isdemonstrated by the numerical examples.