AL3157F-7

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AL3157F-7 belongs to PMIC - LED Drivers. It is an advanced dimming step-down switching regulator with adaptive analog constant current output, designed for driving a single group of LEDs. It intelligently adjusts the internal current limiting value of the charger according to the voltage used by the LED. With its ultra-low standby current, it is suitable for display applications, such as backlighting for LCD displays, digital photo frames, and mobile application units.

ADIB04 is a unique device combining the features of an analog driver, such as dimmable range and efficiency, with a digital controller, such as I2C support and PWM output. This device utilizes a digitally controllable storage capacitor to provide a uniform analog current in the operating range. In addition, it provides temperature compensation for temperature stability and output current accuracy.

AL3157F-7 provides both AC and DC outputs, so it can be used to drive both AC and DC LEDs. This provides more flexibility in the selection of LED types, as well as more efficient operation in certain applications. The device supports a wide range of LED types, such as white LED, LED RGB, LED RGBW, LED dimmable and LED segmented.

The working principle of AL3157F-7 is based on the fact that the LED current is constantly monitored, and the voltage input to the LED is adjusted accordingly. This ensures a constant current output, regardless of the LED\'s operating voltage. The device uses an integrated DCDC controller, which provides a constant voltage output, and a feedback circuit, which measures the current and controls the voltage output from the controller.

The built-in thermal protection can allow the device to operate at high temperatures without damaging the LED. The device also provides built-in protection against short circuit, overvoltage, overcurrent and over temperature. The device is also compatible with all kinds of I2C control devices, such as MCUs, PICs, and digital signal processors. This enables the device to be connected to various control systems.

The AL3157F-7 also provides protections against open circuit, reverse current and under voltage. This reduces the risk of damage to the device and the LEDs from an improper connection or incorrect control signals. It also features automatic voltage scan and LED current balancing, preventing premature LED dimming. The device also supports dimming from 0.1% to 100%, so it can be used for high quality and accurate lighting control.

Overall, AL3157F-7 is an ideal LED driver for applications that require dimming, current regulation and stability. Its advanced design ensures consistent current output, protection against short circuit and overvoltage, and temperature stability. This makes it a reliable, efficient, and cost-effective solution for LED lighting applications.

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