NXP公司的MPT612是基于低功耗ARM7TDMI-S 32位RISC处理器的最大功率跟踪(MPPT)集成电路,工作频率高达72MHz,具有多种串行接口(I2C, UART, SPI, SSP),专用的功能如光伏(PV)电压和电流测量,PV板参数配置,系统效率高达98%,提供10位ADC和8个模拟输入,转换时间低至 2.44 μs,主要用在太阳能PV和燃料电池DC充电控制,公共照明和LED街灯照明的电池充电,DC/DC转换器,微逆变器等.本文介绍了MPT612主要特性和优势,方框图,PV板,控制器 DC负载的简化PV系统框图以及MPPT充电控制器参考系统框图,电路图和材料清单.

The MPT612, the first dedicated IC for performing the Maximum Power Point Tracking (MPPT) function, is designed for use in applications that use solar photovoltaic (PV) cells or in fuel cells. To simplify development and maximize system efficiency, the MPT612 is supported by a patent-pending MPPT algorithm, an application-specific software library and easy-to-use application programming interfaces (APIs). Dedicated hardware functions for PV panels, including voltage and current measurement and panel parameter configuration, simplify design and speed development.

The MPT612 is based on a low-power ARM7TDMI-S RISC processor that operates at up to 70 MHz and can achieve system efficiency ratings up to 98 %. It controls the external switching device through a signal derived from a patent-pending MPPT algorithm. The DC source can be connected to the IC through appropriate voltage and current sensors. The IC dynamically extracts the maximum power from the DC source, without user intervention. The IC can be configured for boundary conditions set in software. There are up to 15 kB of flash memory available for application software.