LC5525F

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The LC5525F is an LED Driver belonging to the PMIC (power manage integrated circuit) family. It is specifically designed for driving and controlling ultra-high bright LEDs requiring a high current at low voltage. This device is ideal for display backlighting in notebook PC, mobile phone, LCD and so on.

The key features of the LC5525F are: an integrated charge pump, high current operation with low shutdown current, low ripple current, low voltage, and a wide operating temperature range. The LC5525F also includes a current limiter which ensures the operation of the device is safe and will not get out of hand, as well as a temperature monitoring system to limit the internal temperatures.

Essentially, this device can provide over 40mA of forward current and up to 1.2V of driving voltage at high efficiency for ultra-high bright LEDs. In this manner, it can drive numerous LED strings without an external voltage booster, or operate in multiple strings even at a single LED. In addition, with its linear current control mode, the LC5525F allows for the adjustment of brightness between 0.5 to 100%, making it easily adaptable to different applications.

The working principle of the LC5525F is quite straightforward. It consists of two core parts, a charge pump and a current limiter. The charge pump allows for the production of a voltage higher than the input voltage, and is used to reduce the ripple current by providing a steady voltage supply to the LED strings. The current limiter works in parallel with the charge pump to ensure the device is operating safely within its limits and restricts the current to the pre-set value. This device also includes a temperature monitor, which automatically shuts down the device in case the internal temperature exceeds a certain limit.

The LC5525F is a versatile device which can be used in multiple applications due to its features and working principle. It is suitable for display backlighting in mobile phones, notebook PCs and LCDs and can also operate with multiple LED strings. The LC5525F also provides adjustable brightness in the range of 0.5 to 100%, making it ideal for applications requiring varying brightness levels. Moreover, its efficient charge pump and low ripple current make it perfect for use in situations with a low input voltage.

All in all, the LC5525F is a powerful LED driver device ideal for use in applications such as backlighting, providing adjustable brightness and low power consumption.

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