A6278ELWTR-T Integrated Circuits (ICs)

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A6278ELWTR-T is a two-channel white LED driver, which offers a highly efficient conduit for controlling and regulating the output of two pairs of light emitting diodes (LEDs). As a part of a large range of power management integrated circuits (PMICs) and LED drivers, A6278ELWTR-T is specifically designed for use in mobile device backlight applications, such as smartphones and tablets. The device is manufactured by Monolithic Power Systems and offers a simple solution for providing an adjustable 0.1%-100% brightness level with only one resistor. In addition, it is capable of driving two white LEDs to provide a range of colours and brightness levels.

In terms of its design, the A6278ELWTR-T driver offers a low-power package that features a 4-pin 3x2-mm package that requires only a low input voltage (2.70-5.5V) and a tiny 2A switch. This makes it an ideal choice for mobile device backlight applications that require low-power systems. The main components which make up the A6278ELWTR-T driver include two sets of internal current-limiting resistors, two external current-limiting resistors and a voltage multiplier for boost voltage supply to the LEDs. The device also includes an internal startup circuit and an auto-start function which eliminates the need for external switches and provides a low-power solution.

In terms of its working principles, the A6278ELWTR-T driver enables switching between two LEDs connected in series by using the External Current Sense Resistor (ExRS) to reduce power dissipation. In simple terms, the driver works by changing the voltage applied to the ExRS in order to control the output current and brightness of the two LEDs. Furthermore, the A6278ELWTR-T driver features an adjustable voltage and current boost stage which enables it to offer a wide range of 0.1%-100% brightness level with just one resistor. This makes the device a highly efficient and cost-effective solution for mobile device backlight applications.

Overall, the A6278ELWTR-T driver is a highly efficient and cost-effective PMIC - LED driver that offers a simple solution for controlling and regulating the output of two pairs of light emitting diodes (LEDs). Its low-power package, adjustable 0.1%-100% brightness level and easy-to-use auto-start function makes it an ideal choice for mobile device backlight applications.

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