概述
MPT612是首个针对使用太阳能光伏(Photovoltaic,简称PV)电池或燃料电池的应用提供最大功率点跟踪(Maximum Power Point Tracking,简称MPPT)的低功耗集成电路。为进一步简化开发和最大限度提升系统的执行效率,MPT612提供了恩智浦正在申请专利的MPPT算法、易于使用的API接口函数和针对特定应用的软件库。
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.
Features:
ARM7TDMI-S 32 bit RISC core operating at up to 70 MHz
128-bit wide interface and accelerator enabling 70 MHz operation
10-bit ADC providing
Eight analog inputs
Conversion times as low as 2.44 μs per channel and dedicated result registers minimize interrupt overhead
Five analog inputs available for user specific applications
One 32-bit timer and external event counter with four capture and four compare channels
One 16-bit timer and external event counter with three compare channels
Low power Real-Time Clock (RTC) with independent power supply and dedicated 32 kHz clock input
Serial interfaces including:
Two UARTs (16C550)
Two Fast I2C-buses (400 kbit/s)
SPI and SSP with buffering and variable data length capabilities
Vectored interrupt controller with configurable priorities and vector addresses
Up to twenty eight (28), 5 V tolerant fast general purpose I/O pins
Up to 13 edge or level sensitive external interrupt pins available
Three levels of flash Code Read Protection (CRP)
70 MHz maximum clock available from programmable on-chip PLL with input frequencies between 10 MHz and 25 MHz and a settling time of 100 ms
Integrated oscillator operates with an external crystal at between 1 MHz and 25 MHz
Power saving modes include:
Idle mode
Two Power-down modes; one with the RTC active and with the RTC deactivated
Individual enabling/disabling of peripheral functions and peripheral clock scaling for additional power optimization
Processor wake-up from Power-down and Deep power-down mode using an external interrupt or the RTC
Applications:
DC application charge controller for solar PV power and fuel-cells. The use cases are
Battery charging for home appliances such as lighting, DC fans, DC TV,DC motor or any other DC appliance
Battery charging for public lighting and signaling - LED street lighting, garden/driveway lighting, railway signaling, traffic signaling, remote telecom terminals/towers etc
Battery charging for portable devices
DC-DC converter per panel to provide improved efficiency
Micro inverter per panel removes the need for one large system inverter