To prevent sub-harmonic oscillation and improve the stability and load capacity of the system,a piecewise linear slope compensation circuit is designed. Compared with the traditional design, this circuit provides a co...To prevent sub-harmonic oscillation and improve the stability and load capacity of the system,a piecewise linear slope compensation circuit is designed. Compared with the traditional design, this circuit provides a compensation signal whose slope varies from different duty cycles at - 40-85℃ ,and reduces the negative effect of slope compensation on the system＇s load capacity and transient response. A current mode PWM Boost DC-DC converter employing this slope compensation circuit is implemented in a UMC 0.6μm-BCD process. The results indicate that the circuit works well and effectively,and the load capacity is increased by 20%. The chip area of the piecewise linear slope compensation circuit is 0.01mm^2 ,which consumes only 8μA quiescent current,and the efficiency ranges up to 93%.展开更多
提出一种单电感双输出(SIDO)开关变换器的电流型控制技术。以工作于连续导电模式(CCM)的SIDO Boost变换器为例,详细分析电流型控制CCM SIDO Boost变换器的工作原理、工作时序、系统稳定性,得到变换器稳定工作的条件。建立电流型控制CCM ...提出一种单电感双输出(SIDO)开关变换器的电流型控制技术。以工作于连续导电模式(CCM)的SIDO Boost变换器为例,详细分析电流型控制CCM SIDO Boost变换器的工作原理、工作时序、系统稳定性,得到变换器稳定工作的条件。建立电流型控制CCM SIDO Boost变换器的时域仿真模型,通过时域仿真分析变换器的稳态性能、瞬态性能、输出支路的交叉影响以及稳定性。研究结果表明:相比于传统的共模-差模电压型控制,电流型控制CCM SIDO Boost变换器可提高变换器的瞬态响应速度并抑制输出支路间的交叉影响;对于变换器存在的不稳定性问题,可以通过引入适当的斜坡补偿解决。最后通过实验验证了理论分析的正确性。展开更多
文摘To prevent sub-harmonic oscillation and improve the stability and load capacity of the system,a piecewise linear slope compensation circuit is designed. Compared with the traditional design, this circuit provides a compensation signal whose slope varies from different duty cycles at - 40-85℃ ,and reduces the negative effect of slope compensation on the system＇s load capacity and transient response. A current mode PWM Boost DC-DC converter employing this slope compensation circuit is implemented in a UMC 0.6μm-BCD process. The results indicate that the circuit works well and effectively,and the load capacity is increased by 20%. The chip area of the piecewise linear slope compensation circuit is 0.01mm^2 ,which consumes only 8μA quiescent current,and the efficiency ranges up to 93%.
文摘提出一种单电感双输出(SIDO)开关变换器的电流型控制技术。以工作于连续导电模式(CCM)的SIDO Boost变换器为例,详细分析电流型控制CCM SIDO Boost变换器的工作原理、工作时序、系统稳定性,得到变换器稳定工作的条件。建立电流型控制CCM SIDO Boost变换器的时域仿真模型,通过时域仿真分析变换器的稳态性能、瞬态性能、输出支路的交叉影响以及稳定性。研究结果表明:相比于传统的共模-差模电压型控制,电流型控制CCM SIDO Boost变换器可提高变换器的瞬态响应速度并抑制输出支路间的交叉影响;对于变换器存在的不稳定性问题,可以通过引入适当的斜坡补偿解决。最后通过实验验证了理论分析的正确性。
