STMicroelectronics

ST3485EIDT  

Drivers, Receivers, Transceivers

The ST3485EIDT is a high-performance, monolithic integrated circuit manufactured by STMicroelectronics. This device is designed for use in automotive applications, specifically for controlling the brightness of LED arrays in automotive lighting systems.

Description:

The ST3485EIDT is a step-down (buck) converter with a built-in LED driver. It is designed to provide efficient and precise control of the current flowing through the LED array, ensuring consistent brightness and color temperature. The device is available in a compact, thermally enhanced TSSOP-20 package, making it suitable for space-constrained applications.

Features:

1. High efficiency: The ST3485EIDT offers high efficiency levels, which is crucial for automotive applications where energy consumption is a critical factor.
2. Wide input voltage range: The device can operate with an input voltage range of 9V to 28V, making it suitable for various automotive systems.
3. Integrated LED driver: The ST3485EIDT includes an integrated LED driver, which simplifies the design and reduces the number of external components required.
4. Precise current control: The device provides precise control of the LED current, ensuring consistent brightness and color temperature across the LED array.
5. Protection features: The ST3485EIDT includes various protection features such as over-current protection, over-voltage protection, and thermal shutdown to ensure the safety and reliability of the system.
6. PWM dimming: The device supports pulse-width modulation (PWM) dimming, allowing for smooth and efficient control of the LED brightness.
7. Thermal management: The TSSOP-20 package is designed for efficient thermal dissipation, ensuring the device operates within safe temperature limits.

Applications:

1. Automotive LED headlights: The ST3485EIDT is ideal for controlling the brightness of LED arrays in automotive headlights, providing consistent and efficient lighting.
2. Taillights and brake lights: The device can also be used for controlling the brightness of LED arrays in taillights and brake lights, ensuring optimal visibility and safety.
3. Interior lighting: The ST3485EIDT can be used in automotive interior lighting applications, such as ambient lighting or reading lights, to provide a consistent and energy-efficient lighting solution.
4. Daytime running lights (DRL): The device can be used to control the brightness of LED arrays in DRL systems, ensuring optimal visibility during daytime driving conditions.

In summary, the ST3485EIDT from STMicroelectronics is a high-performance, integrated LED driver and step-down converter designed for automotive applications. It offers a wide input voltage range, precise current control, and various protection features, making it an ideal solution for automotive LED lighting systems.

ST3485EIDT Documents

Download datasheets and manufacturer documentation for ST3485EIDT

Datasheets :

ST3485EB, EC, EIY      

HTML Datasheet :

ST3485EB, EC, EIY