U.S. National Semiconductor (NS) solutions for the growing solar energy system applications, recently, the company launched a total of 10 new SolarMagic IC chip, its advantage is to reduce the cost of photovoltaic power generation system, improve its stability and simplify circuit design related.
U.S. National Semiconductor Asia Pacific business development director Zhang Yaoqiang core markets, said the new chip family has the industry's first full-bridge gate driver and micro-power voltage regulator for photovoltaic systems in a variety of electronic devices, including micro-inverters, power optimizer, charge controller and battery board safety systems. In these 10 products, MPPT (maximum power conversion tracking) controller has 2 models, respectively, SM72441 and SM72442, allowing optimization of photovoltaic distributed power systems to add the maximum power conversion tracking. Both chips have a variety of different functions, including voltage and current diagnostics, four built-in switch boost / buck converter control, overvoltage / overcurrent protection and I2C interface functions.
Gate drive has 2 full-bridge model SM72295 and SM72482 gate driver dual 5A compound gate driver can support power optimizer, micro-inverters and charge controllers in power processing circuits. In addition, both drives can drive 4 full-bridge configuration using discrete MOSFET, while each product is built-in high over-current sense amplifiers, the amplifiers have a higher current sink / source.
Regulator of two products in the United States National Semiconductor optimized specifically for the drive power, micro inverter and charge controller for various types of bias power supply system provides SM72485 constant on-time switching regulator, which is characterized by operation voltage up to 100V, and high power conversion efficiency. Another is to provide lower system power consumption SM72238 5V low dropout regulator.
Sensing and detection circuit of four products specifically for photovoltaic systems distributed power optimizer and battery chargers are widely used in the auxiliary circuit to provide a variety of different products, so that such applications can add protection, sensing, monitoring and control. For example, SM72240 chip is a reset circuit with a monitoring function; SM72375 chip is a dual micro-power rail-to-Rail Input CMOS Comparator; SM72480 chip is the industry's most accurate and pre-set temperature switch and sensor ; SM72501 is a chip can operate over a wide supply voltage range of high-precision CMOS rail-to-rail input / output amplifier with very low offset voltage and input bias current.
It is understood that long ago, the United States National Semiconductor has introduced 12 new SIMPLE SWITCHER power supply module is easy, the first of these modules on the market can deliver up to 10A of output current, and comply with CISPR 22 (B class) standards for radiation and Conductive EMI in the relevant provisions of the power products for industrial products and communications network infrastructure applications.
