为了提高光伏电池的收集效率和环境适应性,提出了一种带有MPPT功能的高效率光伏电池升压转换器芯片。该电路系统包括新型四相高效电荷泵模块、扰动观察法MPPT控制电路模块、反馈控制模块、纳安级电流基准、检测电路模块等。该芯片采用0.35 μm BCD工艺设计、仿真并流片。芯片尺寸为3.15 mm×2.43 mm。测试结果表明,当光伏电池输出电压大于0.5 V时,升压转换器芯片输出电压提升到3Vin,电压转换效率可达99.4%。MPPT算法使输出功率提升8.53%。当输出负载电流为297 μA时,最宽输出PCE达到85.1%。该芯片实现了高效升压光伏电池输出电压的目标。

To improve the collection efficiency and environmental adaptability of PV cell, a high efficiency boost converter chip with MPPT function for PV cell was proposed. This circuit system included a new type of four-phase high efficiency charge pump module, an MPPT control circuit module which utilized a disturbance observation method, a feedback control module, a nA level current reference, and a detection circuit module. The chip was designed, simulated and manufactured in a 0.35 μm BCD process. The chip size was 3.15 mm×2.43 mm. The test results showed that when the PV cell output voltage was more than 0.5 V, the output voltage of the converter was raised to 3Vin, and the voltage conversion efficiency could reach 99.4%. The MPPT algorithm made the output power improve by 8.53%. When the output load current was 297 μA, the widest output PCE achieved 85.1%. The chip was highly efficient in boosting the output voltage of PV cells.