AL9902FDF-13 Integrated Circuits (ICs)

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AL9902FDF-13 is a high efficiency LED driver from the PMIC-LED drivers category. It is a Low-Side Current Source and a High-Side Current Sink. This LED driver provides high-performance current drive for various LED configurations, offering multiple output current sources that can be used for driving LEDs. The AL9902FDF-13 uses a host chip such as a microcontroller or an LED controller as the master application controlling its LED driving operations.

The AL9902FDF-13 is designed to provide the system designer with a single-package solution to drive up to two strings of LEDs in a variety of LED product applications. The device allows the user to select either internal or external current control. The internal control provides a “programmable” current capability that can be programmed with a few external components. The external control allows the user to adjust the output linearly, with no “programmable” current option. The AL9902FDF-13 also offers a programmable over-temperature shutdown with adjustable hysteresis and thermal overload protection.

The AL9902FDF-13’s working principle is divided into two sections: the first section deals with current regulation and the second deals with thermal management. For the first section, the device uses a built-in current regulator that drives the current in both channels linearly with the duty cycle of the DC current at the same time over the entire output current range. A voltage source is applied to the internal source of the current regulator. When the voltage across the current regulator is set to a certain level, the output current is set according to the selected current-regulation mode. The thermal management section monitors the power consumption of the device and trips a shut-down when the power consumption exceeds the safe level. The device then resets and enters a normal operating mode when the power consumption reduces below the preset level. Should the temperature continue to rise, the device enters an over-temperature shut-down which prevents damage to the LEDs.

The AL9902FDF-13 LED driver is designed for LED lighting and backlight applications. In LED lighting applications, the device allows users to further customize the LED lighting by providing adjustable LED current sources. With two selectable current sources and two output channels, customers can choose from a wide range of LED lighting designs and applications. The AL9902FDF-13 can also be used in backlight applications such as LCD or OLED displays. By enabling adjustable LED current levels, customers can use the device for some very sophisticated backlighting applications.

In conclusion, the AL9902FDF-13 is a high efficiency LED driver from the PMIC-LED drivers category that is designed for LED lighting and backlight applications. It provides high-performance current drive for various LED configurations, multiple output current sources, programmable over-temperature shutdown, and adjustable LED current levels. The device can be used with a host chip such as a microcontroller or an LED controller as the master application. The AL9902FDF-13 can help system designers to provide their customers with a wide range of LED lighting designs and applications in both LED lighting and backlight applications.

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