AS3681 DB

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As the world marches ahead into an era of digital and technological advances, lighting products are now more than just a means of providing illumination. Adopting smart lighting products with advanced lighting control systems helps to reduce electricity consumption, adds convenience and provides aesthetic appeal. The automotive industry also faces such challenges and needs custom-made solutions to meet their requirements for lighting systems. The AS3681 DB is an advanced lighting control system that is designed specifically for automotive and industrial use. It provides an integrated solution for managing and controlling the brightness, color and intensity of a lighting device. The AS3681 DB evaluation board is an evaluation platform based on the AS3681 DB. This highly configurable and versatile platform provides controlled output current per channel, delivering dimming and color control to a variety of LED illuminations. It is capable of driving up to four widely-used RGB LED packages at up to 10mA of continuous current per color. Additionally, its 24-bit trim control feature enables precise current adjustment of ±10%, ensuring accuracy of the illuminance levels. The AS3681 DB evaluation board is field programmable, allowing for customization of the entire application with different I2C parameters. It also provides market-leading Dimming Performance with Smooth Dimming, flicker free dimming from 0.1% to 100%, and excellent EMI performance due to its high switching frequency. To ensure the end-user’s safety, the evaluation board also has over thermal and over voltage protection, making it suitable for most applications.The AS3681 DB evaluation board is robust and efficient, providing excellent power efficiency with its low RDS(ON) design and integrates a low quiescent current mode (<5 µA). It is also capable of working under extreme environmental conditions, making it suitable for automotive environments.The working principle of the AS3681 DB evaluation board is relatively straightforward. It combines four constant current sources, which are operated by pulse-width modulation and four high-side switches to control the current of the LEDs. The four constant current sources and high-side switches are connected to a multiplexer, which is connected to a host microcontroller. The host microcontroller is also connected to an I2C bus. The host microcontroller controls the multiplexer, which controls which of the current sources and switches are enabled and which LEDs to drive. This allows for smooth and efficient dimming of the LEDs.In conclusion, due to its flexible architecture, high performance and excellent safety features, the AS3681 DB evaluation board is an ideal solution for automotive and industrial lighting applications. It is robust, efficient and capable of driving up to four RGB LED packages. Additionally, it features a 24-bit trim control, market-leading dimming performance and excellent EMI performance, making it one of the best solutions available in the automotive and industrial markets.

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