LNK456DG

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LED lighting has been widely used in LED screens, LED outdoor lighting, industrial lighting, lighting sources, decoration lighting and medical lighting applications. With its efficient, durable and reliable properties, this type of light has become popular in a variety of industries and is frequently used in both residential and commercial applications. To manage and control the LED lighting, a reliable power management integrated circuit (PMIC) must be present in order to ensure that the light is distributed evenly and performs optimally.

The LNK456DG PMIC LED driver is designed for LED backlight management and LED lighting applications. This device provides up to 35.4 mA LED drive current and 0.98% current accuracy. It is specifically designed to power LED displays from a 5 V supply, with a differential input voltage of 3V – 10V. It has a wide range of operating temperature, from -40℃ up to 125℃. Its small 3mm2 QFN package makes the driver suitable for high-density applications, such as mobile phones, computers, and industrial lamps.

The LNK456DG offers several protection features, including optimized PWM dimming efficiency, temperature grade protection, over voltage protection and over current protection. This ensures that the driver is safe to operate and provides consistent operation and reliability even in extreme environmental conditions. The device also features a very low standby current of only 0.7 μA, which helps in saving energy.

The LNK456DG is easy to configure and provides an adjustable boost current and frequency, as well as an adjustable valley current for controlling the illumination of the LED light source. It also provides an analog voltage control feature for dimming the LED lighting. This allows for more accurate and efficient control of the LED drive current and light output.

The working principle of LNK456DG PMIC LED driver is to convert the input voltage into a regulated current, which drives the LED load. It employs a fixed frequency, continuous conduction mode variable frequency dc/dc converter utilizing synchronous rectification. This type of converter provides greater than 85% efficiency and is suitable for driving low current LEDs such as those found in LCD backlighting applications. The PWM dimming function is used to modulate the drive current and to reduce the current consumption, thereby extend the life of the LED by reducing the applied voltage. The adjustable boost current and frequency allows for efficient control of the light output in various applications. The adjustable valley current ensures efficient dimming performance over a wide range of illumination levels.

In summary, the LNK456DG PMIC LED driver is an efficient and reliable power management integrated circuit for LED lighting applications. It is designed for LED backlight management and is suitable for various environments. It provides optimal current accuracy, temperature grade protection, over voltage protection and over current protection, as well providing energy efficiency with its low standby current. The adjustable boost current and frequency provides efficient control of the light output and the adjustable valley current ensures efficient dimming performance. This makes it an ideal solution for driving low current LEDs in various applications.}

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