The characteristic of the LED street light

In fact, for LED street light, higher efficiency and longer service life are indispensable to reduce costs. (LED street light)The switching power supply designed for the power supply of LED lamps must also have high efficiency and durability to ensure that it has the same long maintenance free service life as LED lamps. Here, resonant converters are one of the most popular power supply topologies because their performance brings higher power efficiency and reduces EMI compared with previous power supply topologies. (LED street light)Soft switching is an important feature of resonant converter. However, the use of parasitic diodes in resonant converters sometimes leads to system failure. The charge stored in the parasitic diode must be completely removed to avoid large current and voltage surges, including high DV / dt and high di / dt in the topology. Therefore, the key parameters of power MOSFET, such as qrr and reverse recovery DV / DT, will directly affect the dynamic performance of resonant converter