1. The nominal output current of the driver chip is required to be greater than 1.2-1.5A. As LED beads for lighting, the operating current of 1W and 3W LED beads is 350mA and 700mA respectively. High power LED beads require higher current output. Therefore, the driver IC selected for LED bead lighting fixtures must have satisfactory current output. When planning the product, it is necessary to ensure that the driver IC operates in the optimal operating area of 70-90% of the full negative output. 2. The output current of the driving chip must be long-lasting and stable, so that the LED beads can emit light steadily and the brightness will not shine; The same batch of driver chips should be used under the same conditions, and their output current size should be as common as possible, that is, their dispersion should be small, so that they can be produced effectively and orderly on large-scale automated production lines; For driver chips with certain discreteness in output current, it is necessary to select different stages before leaving the factory or putting them into production line. Adjust the resistance value of the current setting resistor (Rs) on the PCB board to ensure that the LED bead constant current driver board produced has the same brightness for similar LED beads. 3. The input voltage scale of the driver chip should be satisfied with DC8-40V to cover the needs of the application surface, and the withstand voltage should be better if it can be greater than 45V; When AC12V or 24V is input, the output voltage of a simple bridge rectifier will fluctuate with the grid voltage, especially when the voltage is too high, the output DC voltage will also be too high. If the driving IC cannot adapt to a wide voltage scale, it will often be broken down when the grid voltage increases, and the LED beads will be burned out as a result. 4. The ability of the driver chip to resist EMI, noise, and high voltage is also related to whether the entire LED bead product can smoothly pass CE, UL, and other certifications. Therefore, the driver chip itself needs to choose excellent topology structure and high voltage production process at the beginning of planning.

5. The packaging of the driver chip is beneficial for rapid heat dissipation of the driver chip core. 6. The power consumption of the driver chip itself is required to be less than 0.5W, and the switching frequency is required to be greater than 120Hz to avoid visible flicker caused by power frequency interference. LED bead green lighting promotes the development of driving chips towards innovative planning. LED bead lighting cannot be separated from driving chips, thus requiring LED bead driving ICs with multiple functions.