AS1109-BSOU

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AS1109-BSOU is a high-performance, 3-channel, constant-current LED driver from Allegro MicroSystems. The device is designed for use in a variety of applications such as LED lighting, retail display lighting, and automotive lighting. AS1109-BSOU is a member of Allegro\'s family of pulse width modulation (PWM) LED drivers, which has been developed to provide high-accuracy LED dimming control.

The AS1109-BSOU is a high-performance, low-cost solution for controlling both single- and multi-channel LED lighting applications. The device delivers up to 3 channels of 0.8 A constant-current regulated LED current, and is capable of dissipating up to 0.8 watts per channel. The output current can be regulated over a wide range of input voltage down to 6.5 V.

The AS1109-BSOU utilizes Pulse Width Modulation (PWM) to achieve a high level of accuracy in controlling output current. PWM allows the device to modify the amount of current delivered to the LEDs by varying the duty cycle of the PWM signal, which in turn results in variable brightness levels from the LEDs. This is ideal for applications that require variable brightness levels to be precisely controlled.

The AS1109-BSOU is designed with a high-efficiency buck-boost regulator, which allows for wide input voltage range operation, even with a single input supply. This enables the device to regulate LED currents precisely even when the supply voltage fluctuates in a wide range. The device includes both a single-channel and a multi-channel input, which allows the user to configure the LED current according to the application needs. The LED current output of each channel can be adjusted using the dedicated control pin or through the I2C interface.

In addition, the AS1109-BSOU offers flexibility for programming the output current. It can be programmed via the I2C interface with the ability to adjust the LED current per channel in steps of 100 mA (with 0.4 mA accuracy). The device also features programmable over-temperature protection (OTP), programmable intelligent protection (IPR), and programmable open-wire detection.

AS1109-BSOU is ideal for applications requiring accurate, stable, and efficient control of multiple LEDs. The device makes it easy to control single and multi-channel LED applications with flexibility and accuracy. The device enables your system to achieve high efficiency and superior performance at a price point that fits your budget.

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