FAN5331SX Integrated Circuits (ICs)

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FAN5331SX is a Common Cathode P-Channel MOSFET linear LED driver device specifically designed to drive a backlight LED chain in LCD display applications. It offers an integrated constant-current regulator and enables a simple, low-cost design solution with minimal external components. It uses patent pending dimming control algorithms and a very low drop out voltage to accurately regulate the LED chain current from 0.5 mA to 1 A. The device also features adjustable peak current for various LED chain topologies and also supports external PWM dimming input.

FAN5331SX is intended for use as an LED driver in the backlight of an LCD display. This device provides a constant current output for up to 16 LEDs in series, with a minimum input voltage of 9V, and an output voltage of up to 26V. The output current is adjustable between 0.5mA and 1A. The device is designed to be thermally efficient and is optimized for peak efficiency at 100% LED current. It offers a wide range of dimming options, including external PWM dimming, as well as adjustable internal dimming. The device can also be used as a general-purpose linear LED driver.

The main components of the FAN5331SX are its main output transistor, a P-Channel MOSFET, and a P-Channel linear driver. The P-Channel MOSFET is the primary switch that controls the output current to the LEDs in the backlight. It is controlled by the P-Channel linear driver, which is responsible for providing a constant current output to the LEDs. The linear driver is a specialized type of MOSFET driver, and its primary function is to provide a steady current output over the wide range of input voltages and LED chain configurations.

In order to precisely regulate the LED chain current, the FAN5331SX utilizes several patent pending dimming control algorithms. These algorithms allow the device to accurately adjust the output current in real-time according to the varying input voltage and LED chain configuration. Additionally, the device supports external PWM dimming input for further flexibility. The device has built-in over-current and thermal protection, as well as soft-start, restart and safety features.

The FAN5331SX is a highly integrated and cost-effective solution for LCD backlight applications. It is an ideal choice for designers looking for a compact and easy-to-implement LED driver solution that provides excellent light intensity control and dimming capability. It offers superior performance, with high efficiency, low drop out voltage and low quiescent current.

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