ON Semiconductor FL7740 is used in intelligent lighting to achieve dimming and energy saving.
Light is vital to our daily lives, whether at work, at home or on the road. Without light, people simply cannot perform normal daily activities. So we probably shouldn't be surprised by the huge amount of electricity used in lighting. According to estimates by the US Energy Information Administration, US residential and industrial/commercial lighting consumed 279 billion kilowatt-hours of electricity in 2016. This accounts for about 10% of the total energy consumption in these two areas, about 7% of the total US energy consumption. The relative value of such electricity consumption in other developed countries in the world is similar.
Traditional basic lighting technology is very energy inefficient. In fact, inconspicuous incandescent bulbs can convert less than 5% of the energy used into visible light. Fortunately, this century-old core technology is gradually being phased out, especially with the beginning of the emergence of light-emitting diode (LED) technology, the technology can now achieve more than 50% conversion energy efficiency. The decline in the price of LED products and incentives to move users to more advanced technologies have further spurred adoption rates. Some estimates say that by 2030, the widespread use of LEDs can save 40% of electricity consumption.
In addition to the inherent energy efficiency improvements, LED lighting is also used in smart lighting applications, and smart lighting applications are rapidly gaining popularity due to the ability to save more energy and tailor flexible solutions to specific application needs.
But intelligent lighting has its inevitability, it requires the corresponding "smart", efficient semiconductor-based drivers and controllers. In 10W to 100W intelligent lighting applications for offices, factories and homes, ON Semiconductor's FL7740 (primary end) and FL7760 (DC-DC buck) combine to support a simplified topology and bill of materials. They provide precise constant voltage regulation and support analog and pulse width modulation (PWM) dimming. They help intelligent lighting engineers achieve and exceed design goals to meet and exceed increasingly stringent emerging global standards.
In addition to providing the constant voltage regulation required for LED lighting steady state, the FL7740 also features fast response time, low power consumption (included in standby mode, which is a key specification for smart lighting), a high power factor of approximately 0.9, Less than 10% total harmonic distortion (THD) and universal input at half load.
It is a good thing to dim
The FL7760 is responsible for dimming and features an industry-leading 5 to 100% wide analog dimming range; this range makes analog dimming a practical choice for lighting designers for the first time. While the inherent problems of fast and intense switching causing flicker and audible noise are less than ideal, the device can support PWM dimming over the entire range. One of the main innovations of the FL7760 is its ability to seamlessly combine analog and PWM dimming when dimming is required below the 5% analog dimming limit.
Thanks to the control functions provided by semiconductor technology, LED smart lighting is not only practical but also easier to implement, making it possible to improve the working and living environment and save tens of billions of kilowatts of electricity in the near future.
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