AS1109-BSSU

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AS1109-BSSU is an integrated power management and illumination control IC that is designed to provide a complete solution for LED lighting driver applications. The IC provides an output voltage of up to 19.5V with a peak current up to 3.3A. Combining an advanced signal processing core with an integrated power control stage eliminates the need for external components, yielding a highly efficient and reliable solution for LED lighting control. The device includes a fast-start controller and a high-speed PWM dimming control loop that enables smooth brightness. In addition, the built-in over-temperature protection feature ensures safe operation.

The AS1109-BSSU combines a high-side power stage, a low-side power stage, and a controller. The high-side power stage is used to deliver current to the LED load, and is comprised of four paralleled transistors, providing a maximum drain current of 3.3A. The parallel architecture allows for greater efficiency and power delivery, and enables a wide range of LED wattages to be driven. The low-side power stage consists of two paralleled transistors, providing a maximum sink current of 2.5A.

The controller is the main feature of the AS1109-BSSU, and forms the core of the control system. It is responsible for providing the switching waveforms that control the operation of the power stages, and for monitoring the voltage and current levels at the input and output of the device. It features a sophisticated signal processing core that is capable of recognizing waveform shapes and providing the appropriate response. This provides advanced features such as waveform-based dimming, pulse-width modulation (PWM) dimming control, and waveform-based overvoltage protection.

The AS1109-BSSU also offers a variety of protection features for enhanced reliability and safety. The device includes an over-temperature protection feature that automatically shuts down the output when the temperature exceeds a preset threshold. It also features a current limit, an overvoltage protection circuit, and undervoltage lockout for additional safety. The IC is designed to operate over a wide temperature range, from -40°C to 85°C.

The AS1109-BSSU is an ideal solution for applications such as automotive lighting, general illumination, display lighting, architectural lighting, illumination control, and energy-saving lighting. The highly efficient and reliable device enables the construction of durable, cost-effective LED lighting systems.

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