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首页> 外文期刊>IEEE Journal of Solid-State Circuits >An 18 V Input 10 MHz Buck Converter With 125 ps Mixed-Signal Dead Time Control
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An 18 V Input 10 MHz Buck Converter With 125 ps Mixed-Signal Dead Time Control

机译：具有125ps混合信号空载时间控制的18V输入10MHz降压转换器

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摘要

A highly integrated synchronous buck converter with a predictive dead time control for input voltages with 10 MHz switching frequency is presented. A high resolution dead time of allows to reduce dead time dependent losses without requiring body diode conduction to evaluate the dead time. High resolution is achieved by frequency compensated sampling of the switching node and by an 8 bit differential delay chain. Dead time parameters are derived in a comprehensive study of dead time depended losses. This way, the efficiency of fast switching DCDC converters can be optimized by eliminating the body diode forward conduction losses, minimizing reverse recovery losses and by achieving zero voltage switching. High-speed circuit blocks for fast switching operation are presented including level shifter, gate driver, PWM generator. The converter has been implemented in a 180 nm high-voltage BiCMOS technology. The power losses were measured to be reduced by up to 31% by the proposed dead time control, which results in a 5.3% efficiency increase at , , and 0.45 A load. At , the peak efficiency is 81.2% with an efficiency improvement of 6% with dead time control.
机译：提出了一种具有预测死区时间控制的高度集成的同步降压转换器，用于具有10MHz开关频率的输入电压。高分辨率的死区时间允许减少与死区时间有关的损耗，而无需体二极管导通来评估死区时间。通过对交换节点进行频率补偿采样以及通过8位差分延迟链来实现高分辨率。死区时间参数是在死区时间相关损失的综合研究中得出的。这样，可以通过消除体二极管的正向传导损耗，最小化反向恢复损耗并实现零电压开关来优化快速开关DCDC转换器的效率。提出了用于快速开关操作的高速电路模块，包括电平转换器，栅极驱动器，PWM发生器。该转换器已采用180 nm高压BiCMOS技术实现。通过建议的空载时间控制测量得出的功率损耗最多可降低31％，这导致在，和0.45A负载下效率提高5.3％。在处，峰值效率为81.2％，通过死区时间控制，效率提高了6％。

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