NS SM72442太阳能充电MPPT控制方案

NS公司的SM72442是可编程MPPT控制器,可控制四个开关降压/升压转换器的四路PWM栅极驱动信号,和光伏电压全桥驱动器一起,可组成MPPT配置的DC/DC转换器,效率高达99.5%.器件集成了8路12位ADC,用来检测输入和输出电压与电流以及板配置,可编程的数值包括最大输出电压,电流和转换速率,软起动和板模式等.本文介绍了SM72442主要特性, 典型应用电路图以及SolarMagic™ SM3320-BATT-EV充电控制器参考设计主要特性,方框图,电路图和材料清单.
SM72442 Programmable Maximum Power Point Tracking Controller for Photovoltaic Solar Panels
The SM72442 is a programmable MPPT controller capable of controlling four PWM gate drive signals for a 4-switch buckboost converter. The SM72442 also features a proprietary algorithm called Panel Mode which allows for the panel to be connected directly to the output of your power optimizer circuit.
Along with the SM72295 (Photovoltaic Full Bridge Driver) it creates a solution for an MPPT configured DC-DC converter with efficiencies up to 99.5%. Integrated into the chip is an 8- channel, 12 bit A/D converter used to sense input and output voltages and currents, as well as board configuration. Externally programmable values include maximum output voltage and current as well as different settings on slew rate, soft-start and Panel Mode.
SM72442主要特性:
■ Renewable Energy Grade
■ Programmable maximum power point tracking
■ Photovoltaic solar panel voltage and current diagnostic
■ Single inductor four switch buck-boost converter control
■ I2C interface for communication
■ VOUT Overvoltage protection
■ Over-current protection

图1.SM72442方框图

图2.SM72442典型应用电路图

图3.SM72442平板模式应用案例框图
SolarMagic™ SM3320-BATT-EV充电控制器参考设计
SolarMagic™ SM3320-BATT-EV Charge Controller Reference Design
The SM72442 MPPT digital controller and SM72295 photovoltaic full bridge drivers are designed to control high efficiency DC/DC conversion used in photovoltaic applications. This application note will de...