LM3409MYX/NOPB Integrated Circuits (ICs)

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Non-isolated buck LED drivers are energy efficient solutions for driving LEDs from a variety of low voltage sources. LM3409MYX/NOPB drivers are part of the family of LED drivers from Texas Instruments that offers a variety of features and compact packages. The LM3409MYX/NOPB offers a high efficiency, low ripple current, low noise, and wide input voltage range, making it ideal for general purpose LED applications. This product is suitable for use in solid state lighting, automotive lighting, LCD backlighting, and industrial displays.

The LM3409MYX/NOPB driver is a high efficiency, non-isolated buck LED driver integrated circuit (IC). This IC is designed to drive LEDs from a wide range of input voltages, from 4.5V to 42V. It is configured as a single buck converter with a programmable frequency of up to 2MHz. The IC can drive up to three LEDs in series or up to two multi-string LED configurations in parallel. The chip also features a wide range of protections, including overvoltage protection, overcurrent protection, short-circuit protection, thermal shutdown, and open-circuit protection. The LM3409MYX/NOPB can be configured to source constant current or constant voltage output, making it suitable for a wide range of different LED applications.

The LM3409MYX/NOPB has an internal 300mΩ power switch and an integrated synchronous rectifier. The 300mΩ power switch enables higher efficiency and low input voltage ripple while the synchronous rectifier increases the device efficiency even further. The switching frequency can be set using an external resistor, allowing designers to optimize the frequency for their particular application. The IC also features a dimming control interface, allowing it to be dimmed using a PWM signal or a linear voltage signal. Finally, the IC includes a high-side LED current sense for measuring and regulating the LED operating current.

The LM3409MYX/NOPB is a compact IC with a small footprint – it only requires a handful of external components, making it suitable for space-constrained applications. The IC is protected against ElectroStatic Discharge (ESD) up to 4kV Human Body Model (HBM), ensuring robustness in the presence of ESD events. It is available in the industry-standard 6-pin SOP package and the tiny 3mm x 3mm WSON package.

The LM3409MYX/NOPB LED driver is a versatile and efficient solution for driving LEDs in a variety of applications. Its wide input voltage range, high efficiency, low ripple current, and low noise make it an ideal solution for general purpose LED applications such as solid state lighting, automotive lighting, LCD backlighting, and industrial displays. Its small size and modest component count make it well-suited for space-constrained designs. Finally, its robust protection features protect it against ESD events and other potential hazards.

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