AL1792AFE-13

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The AL1792AFE-13 is an LED driver application-specific integrated circuit (ASIC) manufactured by an outstanding company called Advanced Linear Devices Inc. (ALD). This chip is designed to address the problem of driving multi-channel LED strings efficiently and increase the life span of LED lights. It has a wide range of typical applications, including general lightings, RGB/RGBW scheme with three to four PWMs, and even dimmable lightings with phase cut dimmers. It can also be used in outdoor decorative lighting, signage and street lighting. The AL1792AFE-13 has several features that make it an ideal solution for powering different types of LEDs.

The main purpose of the chip is to control the current drive of the multi channel LED string. The chip uses Pulse-Width Modulation (PWM) to regulate the current flow, and has a built-in protection from short circuit or overtemp events. Furthermore, it is designed to minimize power losses and current disturbances on the output. It is also designed with a very low power consumption and a customizable soft-start function for each channel.

In terms of its operational principle, the AL1792AFE-13 chip is powered by a wide voltage range ranging from 5V to 70V dc without need of external components. This allows users to provide a single power supply to multiple output channels which can be adjusted with PWM signals. An internal oscillator provides the necessary clock signal to the internal logic circuit, while a dedicated input stage controls the PWM current level and the on-time length. The chip enables active PFC (power factor correction) during dimming operations, which helps provide improved levels of power efficiency.

The Output stage of the chip is made up of two current sensing FETs, which driver the LED strip. The load is connected between OUT1 and OUT2, and the load current is monitored and adjusted between these two pins. The logic control circuit monitors the current level on the output and compares it to the target PWM level, then controls the FETs on or off state in order to modulate the LED current level. The chip can work in both continuous or pulse-width modulation modes, depending on the desired application.

Finally, the AL1792AFE-13 chip offers multiple protection features such as built-in overvoltage limiter, overcurrent limiter, and thermal protection. This makes it suitable for applications subjected to varying operating conditions, and helps in increasing the life span of LED lights. Furthermore, the chip is assembled with a dielectric surface-mount package that ensures excellent thermal and electrical isolation.

In conclusion, the AL1792AFE-13 LED driver chip has a wide range of typical applications such as general illumination, RGB/RGBW schemes and dimmable lightings. It has a wide voltage range and offers high power efficiency, along with various protection features. It is a great solution for LED lighting applications, and can be used to increase the life span of the LED lights.

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