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Evaluation Boards - LED Drivers

The LM3633EVM is a cost-effective evaluation platform for driving and controlling high power LEDs. It is powered by Texas Instruments’ LM3633 high power LED driver IC, which provides a flexible and programmable solution for driving multiple white, RGB, and RGBW LEDs electrically. This platform is suitable for many different lighting designs, from low power to high power, and from single channel to multi-channel systems. The LM3633EVM enables designers to quickly see the performance and features of the LM3633 when used in a lighting application. The platform uses pushbutton switches and an on-board current sense resistor to emulate real-world user control. The LM3633’s integrated brightness control and current control features, along with the appropriate external components and PCB board layout, allow the designer to quickly and easily evaluate how the LM3633 performs in their application.

LM3633EVM Application Field

The LM3633EVM is designed to be used in any application where high power LEDs are used and real-world user control is desired. These applications include general lighting, automotive interior and exterior lighting, industrial lighting, display backlighting, and portable lighting, to name a few. The computer interface allows for control, monitoring, and data gathering over a wide range of applications and conditions.

The LM3633EVM is a great tool for designers of LED lighting systems, as it provides an easy way to quickly evaluate the performance of the LM3633 for their application. It also enables designers to experiment with different system parameters, such as current levels, PWM dimming frequency, and thermal protection settings. The evaluation board provides a flexible and powerful platform for development and testing of multi-channel LED systems. Additionally, the board layout and accompanying documentation provide guidance on board layout and component placement, ensuring that the application works as designed and that the LED system operates as intended.

LM3633EVM Working Principle

The LM3633EVM is based on the LM3633 high power LED driver IC. The LM3633 can be used to drive high power LEDs up to 6A per channel, and the evaluation board supports up to 3 channels. The board incorporates a synchronous Buck DC/DC converter topology, which allows the designers to programmable circuit parameters easily using external resistors, as well as setting current limits, voltage levels, and frequency to achieve optimal performance. The board also includes a user interface circuit consisting of pushbutton switches and a trimpot. With the user interface, the designer can easily control the brightness of the LEDs, manage current level, and test various features of the regulator. An as well as set of programming signals allow the user to tailor the designer to adjust over current, over voltage and over temperature protection, as well as dimming frequency.

The board also contains an on-board current sense resistors, which allow the regulator to monitor current levels within the LED circuit, ensuring that it is within the accepted range. Additionally, the board includes a 10-bit digital-to-analog converter (DAC) for LED brightness control, as well as a set of opto-isolated digital I/Os for development system control. The DAC provides a resolution of 10 bits for bright optimization for the application. A USB port enables the use of a computer to monitor and adjust various system parameters, as well as monitor and control the application.

The LM3633EVM can be used in any application where high power LEDs are used and real-world user control is desired. It is an ideal tool to quickly evaluate the performance of the LM3633 in a lighting application. The board is fully assembled, tested and verified; however, some components may require minor modification or addition depending on the application. It is designed to support both single and multi-channel applications, and its user interface, computer monitoring, and control capabilities make it easy to evaluate the performance of the LM3633. Additionally, the accompanying documentation provides guidance on board layout and component placement; ensures that the application works as designed; and that the LED system operates as intended.

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