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What Are The Requirements Of LED Floodlight For Low Voltage Drive Chips?
- Jan 29, 2018 -

LED Floodlight for Low-voltage Drive chip is required, the specific requirements of small series also summed up, as follows:


1. Drive chip resistance to EMI, noise and resistance to high pressure is also related to the entire LED lighting products can be successfully passed CE, UL and other certification, so the design of the driving chip to choose the advanced topology and high-pressure production process.


2. Drive chip packaging should be conducive to the rapid cooling of the drive chip tube core, such as the bare piece directly bound in the copper, and a pin directly extended to the package, so as to directly weld in the PCB board of copper foil rapid heat conduction. If the chip on a similar 4x4mm for a long time through the 300~1,000ma current, it will inevitably produce power and heat, so the chip itself physical cooling structure is also very important.


3. The nominal input voltage range of the drive chip shall satisfy the DC 8~40v to cover the wider application needs. The best pressure resistance is greater than 45V. When the input is AC 12V or 24V, the output voltage of the simple bridge rectifier will fluctuate with the voltage of the power grid, especially when the voltage is high, and the output DC voltage will be higher. If the drive IC does not have a wide input voltage range, it will often be penetrated when the power grid voltage rises, thus burning the LED light source.


4. The nominal output current of the drive chip is larger than 1.2~1.5a. As the LED light source for lighting, the nominal working current of the 1W power LED light source is the nominal working current of the LED light source with 350ma,3w power as 700mA. High-power LED light source needs more current, so LED lighting selection of the driver IC must have sufficient current output, design products must also make the driver IC work in full load output 70~90% best work area. The use of full load output current driver IC in the light in the small space of light cooling, easy to cause the lamp fatigue and early failure.


5. Drive Chip's own power consumption requirements are less than 0.5W, switching operating frequency requirements greater than 120Hz, so as to avoid the occurrence of the frequency of interference to produce visible flashes. In short, led green lighting drive chip to the development of innovative design. LED lighting can not be separated from the driver chip, so need multi-function LED light source driver IC. If the LED lamps choose the following 36V AC power supply, you can consider the non-isolated power supply; If you choose 220V and 100V AC power, you should consider isolating the power supply. Direct use of AC 100~220v drive chip, due to the application of the volume of demanding requirements, in the technical still higher requirements, greater difficulty, at present all countries are working hard to develop. LED lamps of the mass demand market for all IC design companies once again the chance of success, if the rapid transformation, early out of the product, the chances of winning a lot.