LT3478IFE#PBF

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LED Drivers have been widely used for a variety of applications, including mobile phones, automotive lighting and other lighting solutions. The LT3478IFE#PBF high-efficiency, high-current LED driver from Linear Technology is designed for highly efficient LED driving applications.

The LT3478IFE#PBF is a current-mode PWM LED driver that allows for fast energy transfer from input side to output side. The device features 2-MHz fixed frequency operation, low-side current sensing, integrated inductor current sensing, step-up/step-down controller functionality, and open-collector logic outputs. In addition, the LT3478IFE#PBF offers up to 5A peak output current and up to 5V output voltage.

The LT3478IFE#PBF offers two power paths, an externally adjustable main power path, and a secondary pre-regulator path that maintains maximum efficiency. This allows users to adjust the output configurations to meet their individual application needs. Its low-side integrated P-RDS support up to 5A peak current, allowing the device to drive multiple LEDs with a single IC. The LT3478IFE#PBF also features a 2.5V to 5.5V input voltage range, making the device suitable for a variety of applications.

In terms of working principle, the LT3478IFE#PBF has a DC buck-boost regulator that converts the input voltage to a required output voltage. The input voltage is first given to an input voltage error amplifier that compares it to an internal reference voltage. The output of the error amplifier is then given to a pulse-width modulator that controls the peak inductor current. The loss in inductor current is compensated by controlling the peak current and providing a portion of the energy from the output. The output of the pulse-width modulator is then fed to the switch that drives the inductor. The output is then monitored for over-current or over-voltage protection.

The LT3478IFE#PBF is a high-efficiency, high-current LED driver designed for automotive lighting, mobile phones, and other lighting solutions. The device features integrated inductor current sensing, step-up/step-down controller functionality, open-collector logic outputs, 2-MHz fixed frequency operation, and output current up to 5A. The LT3478IFE#PBF also offers two power paths, allowing users to adjust the output configurations to meet their individual application needs. Its high efficiency makes it an ideal choice for applications that require maximum brightness and clarity.

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