LM2705MF-ADJ/NOPB

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The LM2705MF-ADJ/NOPB is a high-efficiency LED driver designed for LED illumination applications. It is a complete solution for LED systems ranging from 1.8V to 30V input and provides up to 300mA output current. The device includes power factor correction and constant-current control. It also includes short-circuit protection, thermal shutdown and open LED protection.

The LM2705MF-ADJ/NOPB is part of Texas Instruments\' Analog Power Management and Control portfolio, specifically the Power Management and Integrated Circuit (PMIC-LED) Drivers family. By combining constant current control, continuous conduction mode (CCM) PFC, and programmable transition frequency operation, the LM2705MF-ADJ/NOPB simplifies system design and cost by eliminating optional components. It is well suited for medical and industrial applications.

Application Field: The LM2705MF-ADJ/NOPB is designed for a variety of LED illumination applications such as LED Light bars, LED street lights, escalator lights, tunnel lights, LED security systems and wall-mounted spotlights. It provides high-efficiency LED lighting solutions with minimal external part count. The LM2705MF-ADJ/NOPB also offers an open LED protection and short-circuit protection to enhance the reliability of LED illumination systems.

Working Principle: The LM2705MF-ADJ/NOPB is a buck converter-based PFC LED driver. It uses a synchronous buck converter to regulate the output current of the LED load. The IC includes a PFC controller, which maintains the output voltage of the LED load within a fixed range, while generating a high input power factor. The constant-current controller regulates the LED load\'s current. The LED control dims and/or controls the LED load\'s current, depending on the voltage across the LED string. The LM2705MF-ADJ/NOPB also offers a programmable frequency transition and soft-start for improving system efficiency. The output stage of the LM2705MF-ADJ/NOPB consists of an external switch, a synchronous MOSFET and an LC filter. The external switch is connected to the PFC controller to control the external MOSFET to regulate the output current and voltage of the LED load.

The LM2705MF-ADJ/NOPB is a highly configurable, highly efficient, and reliable power management and integrated circuits (PMIC-LED) driver. It offers high power factor, wide input voltage range, and excellent MTBF (Mean TimeBetween Failures). With its programmable transition frequency, the user can optimize system efficiency for various LED load conditions. The LM2705MF-ADJ/NOPB also features wide temperature range and multiple protections to enhance reliability. The device is well-suited for LED illumination applications and its flexible design is ideal for a variety of LED applications.

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