1. The nominal input voltage range of the driving chip should meet the DC 8~40v to cover the wide application needs. Pressure resistance is better than 45V. When input is AC 12V or 24V, the output voltage of a simple bridge rectifier will fluctuate with the voltage of the network, especially when the voltage is high, the output DC voltage will be high. If the drive IC does not have a wide input voltage range, it will often be penetrated when the grid voltage is elevated, thus burning the LED light source.
2. The nominal output current of the driver chip is greater than 1.2~1.5A. As the LED light source for lighting, the nominal working current of 1W power LED light source is 350mA, the nominal working current of 3W power LED light source is 700mA. Large power LED light source needs more current, so the LED lighting selection of the driver IC must have enough current output, design products must also make the drive IC work in full load output of the $number best working area. The use of full load output current of the driver IC in the lamp small space cooling, easy to cause the lamp to fatigue and early failure.
3. The output current of the driving chip must be kept constant so that the LED can be stabilized and will not flicker. The same number of driving chips under the same conditions, the output current size to be as consistent as possible, that is, the dispersion to be small, in order to ensure the production of large batches of automated production line can be effective and orderly. For the output current has a certain discrete driving chip, must be selected in the factory or put into the production line before the sorting, adjust the PCB on the resistance of the current setting resistor size, so that the production of LED lamps constant-current drive plate to similar LED light source luminous brightness consistent to maintain the final product consistency.