MAX20078ATE/V+

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The MAX20078ATE/V+ is a linear LED driver offering a compact solution for LED backlighting in liquid crystal displays (LCDs). It offers a wide range of LED constant current sources, with a step-up voltage output that scales up to 16V, and it enables maximum LED performance in a range of applications. This article will discuss the application field and working principle of the MAX20078ATE/V+.

Application Field

The main application field of the MAX20078ATE/V+ is LCD backlighting. The device is especially suitable for LCD backlighting in notebook PCs and other devices with limited space. It enables high output voltage while consuming only a few microamps in order to maximize power efficiency and minimize power consumption. The device is designed to provide consistent light output over the entire lifetime of the LCD panel, ensuring that the LCD panel’s performance remains consistent over time.

The device is also very suitable for LED indicators. It can be used to drive multiple LEDs with a constant current source. This feature makes it ideal for applications requiring a single-source LED driver, while still providing the necessary light intensity and aspect ratio. Furthermore, the device is capable of driving wide ranges of LED currents without compromising the output efficiency. This allows for greater control and customization of LED lighting.

The MAX20078ATE/V+ is also an excellent choice for LED lighting applications in buildings or for general illumination. The device can be used to provide a consistent light intensity throughout a wide area, without compromising efficiency. It is also capable of providing a high dynamic range of light output, allowing for more precise and adjustable light control. Finally, it is capable of driving a wide range of LEDs, enabling the use of different LED types for different lighting scenarios.

Working Principle

The MAX20078ATE/V+ LED driver operates in a linear manner, meaning that the current through the LED (I LED ) is proportional to the voltage across it (V LED ) according to Ohm\'s law (V LED = I LED R LED ). The device works by maintaining a fixed, constant current through the LED while adjusting the voltage across it in response to changes in the input voltage. The device is designed to maintain a very stable constant current with input voltage variations of up to 10%.

The device uses two MOSFETs in a linear topology to produce a constant current. The output voltage of the device is determined by the input voltage, the output current setting, and the load resistance. The device is capable of handling a wide range of output currents, up to a maximum of 1.25A. It is also capable of handling a wide range of load resistances, ranging from 2.5Ω to 12Ω.

The device includes an on-board, adjustable current-limit feature to ensure that the output current does not exceed the maximum allowable current for the application. This feature allows the device to be used in applications with varying input voltages, as the device will adjust the output voltage accordingly to ensure that the desired current level is maintained. The device also includes over-voltage protection, as well as over-temperature shutdown, to ensure safe operation.

Conclusion

The MAX20078ATE/V+ is a linear LED driver offering a compact solution for LED backlighting in liquid crystal displays (LCDs). It offers a wide range of LED constant current sources, with a step-up voltage output that scales up to 16V, and it enables maximum LED performance in a range of applications. This article discussed the application field and working principle of the MAX20078ATE/V+. It is an excellent choice for LED backlights, LED indicators, and LED lighting applications in general. With its wide range of LED current sources, adjustable current-limit feature, and over-voltage and over-temperature protection, the MAX20078ATE/V+ is a highly efficient and reliable LED driver for many applications.

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