Buck/Boost型开关电源,伴随开关管的开和关,储能电感的电流波形如图1-3所示: 从图中可以看到,电感的电流波形等价于在直流IDC上叠加一个IP-P值为ΔI的交流。因而,IDC成为输出电流IO,主要消耗在负载上;交流ΔI则消耗在负载电容的ESR(EquationSerialResistance)上,成为输出纹波Vripple。 在一个连续模式的周期内,开关...
Ton=(Vo/Vin)*T=Vo/(Vin*fswitch) 任意代入△IL=Ton*(Vin-Vo)/L,可得,流经电感的纹波电流(峰峰值交流成分)Iripple: Iripple=(Vin-Vo)/L✖️Vo/(Vin*fswitch) ☞Iripple为峰峰值电流: Iripple=Vo*(Vin-Vo)/L*Vin*fswitch =Ipeak(max)-Ipeak(min) 👉🏻出达到稳态后,在某一开关周...
Buck-Boost变换器的能量传输模式及输出纹波电压分析 Energy Transmission Modes and Output Ripple Voltage of Buck-Boost Converters.pdf,第5 期电子学报 Voi. 35 No. 5 2007 年5 月 ACTA ELECTRONICA SINICA May 2007 Buck-Boost 变换器的能量传输模式 及输出纹波电
开关电源设计之Buck电路电感、电容值的选取-开关电源从储能器件类型可以分为电感型的和电容型的。针对电感型的无论是Buck还是Boost,无论是升压降压或其他类型,电感在整个电路里起着非常重要的的作用。
The power stage performs the basic power conversion from the input voltage to the output voltage and includes switches and the output filter. This report addresses the buck-boost power stage only and does not cover control circuits. Detailed steady-state and small-signal analysis of the buck-...
推导出了变换器工作于三种模式时的输出纹波电压表示式,指出对于给定负载、电容和开关频率的Buck-Boost变换器,CISM的输出纹波电压最小且与电感无关,而IISM-CCM和IISM-DCM的输出纹波电压较大且随电感减小而增大.CISM和IISM的临界电感即为使得变换器的输出纹波电压最低的最小电感.文中给出实例,实验结果与理论分析...
This paper re-examines the typical textbook analysis of the ideal boost and buck-boost dc-dc converters operating in the continuous conduction mode. It is shown that there is a range of valid average load currents for which the simple equation usually derived to relate output voltage ripple to...
29、ties. These properties include the steady-state voltage conversion ratios, the nature of the input and output currents, and the character of the output voltage ripple. Another important property is the frequency response of the duty-cycle-to-output-voltage transfer function. The buck-boost is...
Boost Converter Working By charging the capacitor C the load is applied to the entire circuit in the ON State and it can construct earlier oscillator cycles. During the ON period the capacitor C can discharge regularly and the amount of high ripple frequency on the output voltage. The approxima...
Switch Mode Power Supplies 15 ZHCA041–1999年3月–2002年11月修订 Understanding Buck-Boost Power Stages in Switch Mode Power Supplies 全面认识开关型电源中的BUCK-BOOST功率级 15 15 The above two equations are then used with loop equations to derive the duty-cycle-to-output voltage transfer ...