CAJ | 학술논문

该文设计了一种带开关宽度动态控制电路的开关式DC-DC转换器。该DC-DC转换器将芯片检测到的负载电流与芯片内部的参考电流进行比较，根据负载的大小动态选择最优的开关宽度和对应的开关驱动器，以减小DC-DC转换器在高频率、轻负载时的转换损耗，从而提高芯片的整体效率。芯片采用低功耗的电压-电流转换电路为开关宽度动态控制电路提供电流信息。为了保证芯片的安全工作，具有保护功能的电路被集成在芯片内部。芯片采用了标准的0.35μm CMOS工艺，实验结果显示，该文设计的电路可以实现DC-DC转换器的动态开关控制，在低负载时效率最大可提高6%。
해문설계료일충대개관관도동태공제전로적개관식DC-DC전환기。해DC-DC전환기장심편검측도적부재전류여심편내부적삼고전류진행비교，근거부재적대소동태선택최우적개관관도화대응적개관구동기，이감소DC-DC전환기재고빈솔、경부재시적전환손모，종이제고심편적정체효솔。심편채용저공모적전압-전류전환전로위개관관도동태공제전로제공전류신식。위료보증심편적안전공작，구유보호공능적전로피집성재심편내부。심편채용료표준적0.35μm CMOS공예，실험결과현시，해문설계적전로가이실현DC-DC전환기적동태개관공제，재저부재시효솔최대가제고6%。
A Dynamic Width Controller (DWC) for switch mode DC-DC converter is designed. Based on the comparison result of the sensed load current and the internal reference current, the controller can select the optimum switch width and drivers for the DC-DC converter according to the load current condition. The controller can improve the efficiency of DC-DC converter for high switching frequency and light load applications. The chip adopts a low power cost Voltage-Current Converter (VCC) to provide load current information for the DWC. To ensure the security of the chip’s performance, protection circuits are also integrated. The chip is simulated and fabricated under standard 0.35 μm CMOS process. The experiment results show that the proposed circuit can achieve dynamic switch width control for the DC-DC converter, and the maximum efficiency improvement is 6%for light load condition.