Switching current integrator for high power density buck switching converter

• Main Authors: ZHEN SHAOWEI, ZHANG BO, FANG ZHOU, LUO PAN, YI ZIHAO
• Format: Patent
• Language: Chinese; English
• Published: 25.06.2021
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; PULSE TECHNIQUE

The invention discloses a switching current integrator circuit for a high-power-density step-down switching converter. The switching current integrator circuit comprises four capacitors, four transmission gates, fourteen NMOS tubes, fifteen PMOS tubes and a current source. The components are mutually connected to form a switching current circuit, so a transfer function is equivalent to an integrator, low-frequency gain is improved, a self-adaptive zero point is introduced to enable a Buck loop to keep stable under different switching frequencies, the chip area is reduced, and the problems that off-chip compensation needs to be introduced into a traditional error amplifier, and transient response is poor when the bandwidth of a Buck converter is fixed at high frequency are solved. 本发明公开了一种用于高功率密度降压型开关变换器的开关电流积分器电路，包括四个电容，四个传输门，十四个NMOS管，十五个PMOS管和电流源。通过这些元件相互连接构成开关电流电路使传递函数等效成一个积分器，提高了低频增益，并引入了自适应零点来使得Buck环路在不同开关频率下保持稳定，减小芯片面积，解决了传统误差放大器需要引入片外补偿，Buck变换器带宽固定在高频时瞬态响应较差的问题。