A Right-Half-Plane Zero-Free Buck-Boost DC-DC Converter with 97.46% High Efficiency and Low Output Voltage Ripple
A Right-Half-Plane Zero-Free Buck-Boost DC-DC Converter with 97.46% High Efficiency and Low Output Voltage Ripple
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A%20右半平面%20零自由%20降压-升压%20DC-DC%20转换器%20with%2097.46%%20高%20效率%20和%20低%20输出%20电压%20纹波
DOI：
10.23919/vlsic.2019.8778075
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Hung
中科院分区：
文献类型：
--
作者：
Yen;Tzu;You;Zheng;Ke;Ying;Ming;Hung
提出的降压升压（BB）转换器可以消除右半平面（RHP）零，以实现物联网（IoT）应用的快速瞬变。BB变换器中的伪升压模式消除了电流通路上的一个电源开关，确保电感的连续电流为常规设计值的一半，从而实现97.46%的峰值效率。输出电压纹波减小到7mV。通过插入一个额外的相位，降压和伪升压模式之间的平滑过渡确保了电压降小于15mV。基于斜率的瞬态增强（SBTE）电路在负载变化为400 mA时加速了9 $\mu$S的瞬态响应。
The right-half-plane (RHP) zero can be eliminated in the proposed buck-boost (BB) converter to achieve fast transients for Internet-of-Thing (IoT) applications. The pseudo-boost mode in the BB converter eliminates one power switch in the current path and ensures that the continuous inductor current is half of the conventional design value to achieve 97.46% peak efficiency. Besides, the output voltage ripple is reduced to 7mV. By inserting an additional phase, a smooth transition between the buck and pseudo-boost modes ensures a voltage drop less than 15mV. The slope-based transient enhancement (SBTE) circuit accelerates transient response in 9 $\mu$S with a load variation of 400 mA.