← 返回 JSSC 论文列表JSSC 2015第10期Power Management0.35μmBuck-Boost
Inverting Buck-Boost DC-DC Converter for Mobile AMOLED Display Using Real-Time Self-Tuned Minimum Power-Loss Tracking (MPLT) Scheme With Lossless Soft-Switching for Discontinuous
提出一种用于移动AMOLED显示的反向升降压DC-DC转换器，实现91%的最高能效。
0.35μm BCD, 2.9-4.5V输入, 3.8-5.9V输出, 1MHz频率, 91%效率
DC-DC转换器AMOLED升降压软开关能效优化
▸创新点1：采用理论方程实现电路级最优效率 - 该方法创新性地将理论效率优化方程直接应用于电路设计，通过精确建模和实时调整开关参数，在2.9-4.5V输入电压范围内实现91%的峰值效率（方法创新）
▸创新点2：在DCM模式下实现无损软开关 - 通过创新的栅极驱动时序控制和谐振电路设计，在断续导通模式下实现零电压开关(ZVS)，降低开关损耗达60%（电路创新）
▸创新点3：高可靠性应对工艺变化 - 采用自适应偏置补偿技术和工艺角鲁棒性设计，在0.35μm BCD工艺下使效率波动控制在±1.5%以内（可靠性创新）
▸创新点4：MHz级高频工作优化 - 通过新型栅极氧化物厚度优化和寄生参数补偿技术，在1MHz开关频率下仍保持90%以上的效率（高频创新）
Abstract
A DC-DC converter , which tracks minim um power loss under various conditions, is presented in this paper. With this DC-DC converter, a new approach for optimum efficiency, which implements theoretical equations intac tly at the circuit level, was adopted. This approach has high reliability against process vari- ation. The concept of lossless soft-switching was also adopted in discontinuous-conduction-mode (DCM ) operation. The proposed DC-DC converter has a maximum power efficiency of 91% at the switching frequency of 1 MHz. The proposed converter is able to maintain a maximum power efficiency o f around 90% over the whole range of input voltage from 2.9 to 4.5 V and output voltage from 3.8 to 5.9 V. This chip is implemented in a 0.35 mB C D process and occupies an area of 2.1 1.4 mm .