双极性晶体管

二极管

ESD保护、TVS、滤波和信号调节ESD保护

MOSFET

氮化镓场效应晶体管(GaN FET)

绝缘栅双极晶体管(IGBTs)

模拟和逻辑IC

汽车应用认证产品(AEC-Q100/Q101)

Photovoltaic (PV) single-phase string inverter

For larger residential as well as commercial projects, when it comes to solar installations often the preferred option is to connect multiple panels in series (string) and convert the combined DC output into AC. Photovoltaic string inverters therefore typically operate in power range of a few kilowatts up to several hundred kilowatts. Their straightforward design and centralized configuration reduce installation complexity and maintenance costs. However, if one panel fails or is shaded, it affects the output level of the entire string, reducing energy production until repairs are made. Overall, string inverters are a popular choice for a wide range of user cases for their simplicity of expanding, ease of installation and transportation.

Block diagrams

Highlighted components are Nexperia focus products

Products

Design considerations

  • Choice of topology for DC/DC and DC/AC conversion, but isolated half-bridge boost and full bridge inverter offer the highest efficiencies
  • Need to ensure a optimal gain ratio on the half-bridge boost and a 50% duty cycle
  • Despite IGBTs dominating the DC/AC stage due to their very low cost, GaN FETs allow for higher efficiency and smaller line filters.

DFN0606 MOSFET：小封装里的高效器件

用更少的器件实现更多的功能，这是移动和便携式应用（尤其是可穿戴设备）的宗旨。通过使用可用的最高效开关选项，设计人员可以获得更多的空间来嵌入功能，同时最大程度地减少电池消耗。Nexperia新推出的小信号MOSFET采用超小型DFN0606封装，能够大幅节省空间，且导通电阻超低。

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Quick Learning - Benefits of using power GaN FETs in Solar inverters

Quick Learning - Benefits of using power GaN FETs in Solar inverters

Join Ilian as he explains the differences between an IGBT based DC/AC converter and a GaN FET based DC/AC converter, highlighting the benefits GaN brings.